<?php

namespace Modules\Expenses\Http\Controllers;

use Carbon\Carbon;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Validator;
use Streamline\Models\Banking;
use Streamline\Models\ChartOfAccount;
use Streamline\Models\HospitalBill;
use Streamline\Models\HospitalInformation;
use Streamline\Models\PatientPaymentMethod;
use Streamline\Models\Payment;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Streamline\Models\PaymentItem;
use Streamline\Models\Quotation;
use Streamline\Models\QuotationType;
use Streamline\Models\Supplier;
use Streamline\Models\TrackInvoice;
use Streamline\Models\TrackReceipt;
use Streamline\Models\User;
use Illuminate\Database\QueryException;
use Streamline\Models\FamilyAccount;
use Barryvdh\Snappy\Facades\SnappyPdf;

class PaymentController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth');
        $this->middleware('permission:Payments-create-payment-item');
        $this->middleware('permission:Payments-edit-payment-item');
        $this->middleware('permission:Payments-list-payment-items');
        $this->middleware('permission:Payments-delete-payment-item');
        $this->middleware('permission:Payments-activate-payment-item');
        $this->middleware('permission:Payments-make-payment');
        $this->middleware('permission:Payments-view-payments-history');
    }

    public function index()
    {

        $hospital_information = HospitalInformation::first();
        $suppliers = Supplier::get();
        $banks = DB::table('chart_of_accounts')->whereNull('deleted_at')->where('type', 4)->get()->toArray();
        $items = DB::table('payment_items')->whereNull('deleted_at')->get()->toArray();
        $expense_accounts = DB::table('chart_of_accounts')->whereNull('deleted_at')->whereIn('type', [2])->get()->toArray();

        return view('expenses::payments.index', compact('banks', 'items', 'suppliers', 'hospital_information', 'expense_accounts'));
    }

    public function make_payment(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'account_balance' => 'required',
            'bank' => 'required',
            'memo' => 'required',
            'item_id' => 'required',
            'expense_date' => 'required',
            'total_amount' => 'required',
        ]);

        $is_payment_of_greater_expense_allowed = is_payment_of_greater_expense_allowed();

        //if the stre@mline is set to not allow banks with less balance pay for bigger expenses then fail & go back
        if (($is_payment_of_greater_expense_allowed == 0) && ((int)$request->total_amount > (int)$request->account_balance)) {
            flash('Your account balance is low.')->error();
            return back()->withInput();
        }

        if ($validator->fails()) {
            $string = "";
            foreach ($validator->errors()->getMessages() as $item) {
                $string .= "{$item[0]}<br>";
            }
            flash($string)->error();
            return back()->withErrors($validator)->withInput();
        } else {

            $logged_in_user_id = Auth::user()->id;

            // actual number of records saved because those with missing fields are disregarded
            $payment_counter = 0;
            $memo = isset($request->memo) ? $request->memo : "N/A";
            $trans_id = generateReceiptNumberFromDB($memo);
            $qty_array = $request->quantity;
            $amt_array = $request->amount;
            $item_array = $request->item_id;
            $expense_acc_id_array = $request->expense_acc_id;
            $vendor_array = $request->supplier_id;
            $unit_cost_array = $request->amount;
            $item_memo_array = $request->item_memo;

            $account_balance = ((int)$request->account_balance - (int)$request->total_amount);
            $bank = ChartOfAccount::where('id', $request->bank)->update(['balance' => $account_balance]);

            // insert this payment
            $expense_date = Carbon::parse($request->expense_date)->toDateString();
            $account_balance_record_on_expense_date = get_latest_banking_record_based_on_transaction_date($request->bank, $expense_date);
            $account_balance_on_expense_date = $account_balance_record_on_expense_date ? (int)$account_balance_record_on_expense_date->account_balance : 0;
            $account_balance_on_expense_date_after_payment = ($account_balance_on_expense_date - (int)$request->total_amount);
            $last_insert_id = capture_bank_record(
                'PAYMENT',
                $expense_date,
                $request->bank,
                implode(',', $expense_acc_id_array),
                $account_balance_on_expense_date_after_payment,
                0,
                (int)$request->total_amount,
                $request->memo,
                $trans_id
            );

            update_banking_record_balances($expense_date, $request->bank, $last_insert_id, $account_balance_on_expense_date_after_payment);

            for ($x = 0; $x < count($qty_array); $x++) {
                if ($qty_array[$x]) {
                    $payment = new Payment;
                    $current = ChartOfAccount::where('id', $expense_acc_id_array[$x])->first();
                    $new = ChartOfAccount::where('id', $expense_acc_id_array[$x])->update(['balance' => ($amt_array[$x] + $current->balance)]);

                    $payment->item_id = $item_array[$x];
                    $payment->vendor = $vendor_array[$x];
                    $payment->unit_cost = $unit_cost_array[$x];
                    $payment->amount = $amt_array[$x];
                    $payment->quantity = $qty_array[$x];
                    $payment->memo = $memo;
                    $payment->item_memo = $item_memo_array[$x];
                    $payment->account_balance = $account_balance_on_expense_date_after_payment;
                    $payment->transaction_id = $trans_id;
                    $payment->account_id = $request->bank;
                    $payment->created_by = $logged_in_user_id;
                    $payment->expense_date = Carbon::parse($request->expense_date)->toDateTimeString();
                    $payment->expense_account = $expense_acc_id_array[$x]; //get_name($item_array[$x], 'id', 'account_id', 'payment_items');

                    $track_receipt = new TrackReceipt;
                    $track_receipt->created_by = $logged_in_user_id;
                    $track_receipt->reason = "Payment transaction of id " . $trans_id;

                    try {
                        if (!is_null($new) && !is_null($bank)) {
                            $payment->save();
                            $track_receipt->save();
                            ++$payment_counter;
                        }

                        ++$payment_counter;
                    } catch (QueryException $e) {
                        //
                    }
                }
            }
            flash(" Payment has been successfully made")->success();
            return redirect()->route('payments.payment_details', $trans_id);
        }
    }

    public function history(Request $request)
    {
        $payments = [];
        $suppliers = Supplier::get();
        $staff_members = User::get();
        $display = expense_report_label_setter($request);
        $today = Carbon::today()->toDateString();
        $yesterday = Carbon::yesterday()->toDateString();
        $hospital_information = HospitalInformation::first();
        $end = Carbon::parse($request->end_date)->endOfDay()->toDateTimeString();
        $start = Carbon::parse($request->start_date)->startOfDay()->toDateTimeString();

        if ($request->vendor == "ALL VENDORS") {
            if ($request->staff_member == "ALL STAFF") {
                switch ($request->dates) {
                    case 'today':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereDate('expense_date', $today)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'yesterday':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereDate('expense_date', $yesterday)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereDate('expense_date', $start)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date_range':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereBetween('expense_date', [$start, $end])->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                }
            } else {
                switch ($request->dates) {
                    case 'today':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereDate('expense_date', $today)->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'yesterday':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereDate('expense_date', $yesterday)->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereDate('expense_date', $start)->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date_range':
                        $payments = DB::table('payments')->whereNull('deleted_at')->whereBetween('expense_date', [$start, $end])->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                }
            }
        } else {
            if ($request->staff_member == "ALL STAFF") {
                switch ($request->dates) {
                    case 'today':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereDate('expense_date', $today)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'yesterday':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereDate('expense_date', $yesterday)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereDate('expense_date', $start)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date_range':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereBetween('expense_date', [$start, $end])->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                }
            } else {
                switch ($request->dates) {
                    case 'today':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereDate('expense_date', $today)->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'yesterday':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereDate('expense_date', $yesterday)->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereDate('expense_date', $start)->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                    case 'custom_date_range':
                        $payments = DB::table('payments')->whereNull('deleted_at')->where('vendor', $request->vendor)->whereBetween('expense_date', [$start, $end])->where('created_by', $request->staff_member)->groupBy('transaction_id')->selectRaw('*, sum(amount) as sum')
                            ->orderBy('id', 'asc')->get()->toArray();
                        break;
                }
            }
        }

        return view('expenses::payments.history', compact('payments', 'hospital_information', 'staff_members', 'suppliers', 'display', 'request'));
    }

    public function detail($trans_id)
    {
        $hospital_information = HospitalInformation::first();
        $payment = DB::table('payments')->whereNull('deleted_at')->where('transaction_id', $trans_id)->get()->toArray();
        if (count($payment) > 0) {
            foreach ($payment as $item) {
                $memo = $item->memo;
                $date = $item->created_at;
                $expense_date = $item->expense_date;
            }
        }
        return view('expenses::payments.details', compact('payment', 'hospital_information', 'memo', 'date', 'expense_date', 'trans_id'));
    }

    public function print_payment_voucher_detail(Request $request)
    {
        $hospital_information = json_decode($request->hospital_information);
        $payment = json_decode($request->payment);
        $memo = $request->memo;
        $date = $request->created_at;
        $expense_date = $request->expense_date;
        $trans_id = $request->trans_id;
        $pdf = SnappyPDF::loadView("expenses::payments.print_voucher_details", compact('payment', 'hospital_information', 'memo', 'date', 'expense_date', 'trans_id'))
            ->setOrientation('portrait')
            ->setPaper('a4')
            ->setOption('margin-bottom', 5)
            ->setOption('margin-top', 5)
            ->setOption('footer-html', '<i>'.config('app.name').' - Printed On ' . date('Y-m-d') . ' By ' . auth()->user()->first_name . " " . auth()->user()->last_name . '</i>');
        return $pdf->inline('Payment Voucher' . date(" d-m-y h:ia") . '.pdf');
    }

    public function edit_payments($trans_id)
    {
        $hospital_information = HospitalInformation::first();
        $suppliers = Supplier::get();
        $items = DB::table('payment_items')->whereNull('deleted_at')->get()->toArray();
        $expense_and_payable_accounts = DB::table('chart_of_accounts')->whereIn('type', [2, 6, 9])->pluck('name', 'id')->toArray();
        $payments_total = 0;

        $payments = DB::table('payments')->whereNull('deleted_at')->where('transaction_id', $trans_id)->orderBy('id', 'asc')->get()->toArray();
        if (count($payments) > 0) {
            foreach ($payments as $item) {
                $memo = $item->memo;
                $date = $item->created_at;
                $expense_date = $item->expense_date;
                $bank = $item->account_id;
                $payments_total += (int)$item->amount;
                $max_id = $item->id;
            }
        }

        $today = Carbon::today()->toDateString();
        $latest_bank_record = get_latest_banking_record_based_on_transaction_date($bank, $today);
        $bank_balance = $latest_bank_record->account_balance;

        return view('expenses::payments.details_edit', compact('trans_id', 'max_id', 'payments', 'payments_total', 'hospital_information', 'memo', 'date', 'expense_date', 'trans_id', 'bank', 'bank_balance', 'items', 'suppliers', 'expense_and_payable_accounts'));
    }

    public function update_payments(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'account_balance' => 'required',
            'bank' => 'required',
            'memo' => 'required',
            'item_id' => 'required',
            'expense_date' => 'required',
            'total_amount' => 'required',
        ]);

        if ((int)$request->total_amount <= (int)$request->account_balance) {
            if ($validator->fails()) {
                $string = "";
                foreach ($validator->errors()->getMessages() as $item) {
                    $string .= "{$item[0]}<br>";
                }
                flash($string)->error();
                return back()->withErrors($validator)->withInput();
            } else {
                $logged_in_user_id = Auth::user()->id;

                $qty_array = $request->quantity;
                $amt_array = $request->amount;
                $item_array = $request->item_id;
                $expense_acc_id_array = $request->expense_acc_id;
                $vendor_array = $request->supplier_id;
                $unit_cost_array = $request->amount;

                $expense_date = Carbon::parse($request->expense_date)->toDateString(); // same as the one in the db since edit is blocked on UI

                // simply editing the past records
                $past_total_expense = 0;
                $past_total_expense_update = 0;
                $payment_index = 0;
                $past_payments = Payment::where('transaction_id', $request->trans_id)->whereNull('deleted_at')->orderBy('id', 'asc')->get();
                if (count($past_payments) > 0) {
                    foreach ($past_payments as $payment) {
                        $past_total_expense += $payment->amount;
                        $past_total_expense_update += $amt_array[$payment_index];

                        // if changes have been submitted
                        $payment_copy = clone $payment;
                        $payment->quantity = $qty_array[$payment_index];
                        $old_payment_amount = $payment->amount;
                        $new_payment_amount = $amt_array[$payment_index];
                        $payment->amount = $new_payment_amount;
                        $payment->item_id = $item_array[$payment_index];
                        $payment->expense_account = $expense_acc_id_array[$payment_index];
                        $payment->vendor = $vendor_array[$payment_index];
                        $payment->unit_cost = $unit_cost_array[$payment_index];
                        if ($payment_copy == $payment) {
                            continue;
                        } else {
                            $bill_id = $payment->bill_id;
                            if ($bill_id != null) {
                                $bill = HospitalBill::where('id', $bill_id)->first();
                                if ($bill) {
                                    $bill->balance = $bill->balance + $old_payment_amount - $new_payment_amount;
                                    $bill->updated_by = $logged_in_user_id;
                                    $bill->update();
                                    flash("Bill (" . $bill->bill_number . ") has been updated")->success();
                                }
                            }
                            $payment->updated_by = $logged_in_user_id;
                            $payment->update();
                            flash("Payment (" . $payment->id . ") has been successfully updated")->success();
                        }
                        $payment_index++;
                    }

                    // if total payment changed, the bank payment record needs an update (amount)
                    if ($past_total_expense != $past_total_expense_update) {
                        $past_bank_records = Banking::where('trans_id', $request->trans_id)
                            ->whereNull('deleted_at')
                            ->where('trans_type', 'PAYMENT')
                            ->get(); // expect one record
                        if (count($past_bank_records) > 0) {
                            foreach ($past_bank_records as $record) {
                                $account_balance_record_on_expense_date = get_latest_banking_record_based_on_transaction_date($record->bank, $expense_date);
                                $account_balance_on_expense_date = (int)$account_balance_record_on_expense_date->account_balance;
                                $account_balance_on_expense_date_after_payment = ($account_balance_on_expense_date - $past_total_expense_update);

                                $record->debit = $past_total_expense_update;
                                $record->account_balance = $account_balance_on_expense_date_after_payment;
                                $record->update();
                                flash("Bank Payment record: " . $record->id . " updated!");

                                // use the bank record before the one just deleted
                                $previous_bank_record = Banking::where('bank', $record->bank)
                                    ->whereNull('deleted_at')
                                    ->where('id', '<', $record->id)
                                    ->orderBy('id', 'desc')
                                    ->first();

                                if ($previous_bank_record) {
                                    update_banking_record_balances(Carbon::parse($previous_bank_record->trans_date)->toDateString(), $record->bank, $previous_bank_record->id, $previous_bank_record->account_balance);
                                } else {
                                    update_banking_record_balances($expense_date, $record->bank, $record->id, $account_balance_on_expense_date_after_payment);
                                }
                                flash("Payment has been deleted successfully from Bank: " . get_name($record->bank, 'id', 'name', 'chart_of_accounts'))->success();
                            }
                        }
                    }
                }
                return redirect()->route('payments.payment_details', $request->trans_id);
            }
        } else {
            flash('Your account balance is low.')->error();
            return back()->withInput();
        }
    }

    public function delete_payments(Request $request)
    {
        $logged_in_user_id = Auth::user()->id;

        // deleting the past records
        $past_total_expense = 0;
        $past_payments = Payment::where('transaction_id', $request->trans_id)->whereNull('deleted_at')->orderBy('id', 'asc')->get();
        if (count($past_payments) > 0) {
            foreach ($past_payments as $payment) {
                $past_total_expense += $payment->amount;

                $payment->updated_by = $logged_in_user_id;
                $payment->update();
                $payment->delete();
                flash("Payment (" . $payment->id . ") has been successfully deleted")->success();
            }

            // delete related bank records
            if ($past_total_expense > 0) {
                $past_bank_records = Banking::where('trans_id', $request->trans_id)
                    ->whereNull('deleted_at')
                    ->where('trans_type', 'PAYMENT')
                    ->get(); // expect one record
                if (count($past_bank_records) > 0) {
                    foreach ($past_bank_records as $record) {
                        $expense_date = Carbon::parse($record->trans_date)->toDateString();
                        $account_balance_record_on_expense_date = get_latest_banking_record_based_on_transaction_date($record->bank, $expense_date);
                        $account_balance_on_expense_date = (int)$account_balance_record_on_expense_date->account_balance;
                        $account_balance_on_expense_date_after_payment = ($account_balance_on_expense_date - $past_total_expense);

                        $record->updated_by = $logged_in_user_id;
                        $record->update();
                        $record->delete();
                        flash("Bank Payment record: " . $record->id . " deleted!")->success();

                        // use the bank record before the one just deleted
                        $previous_bank_record = Banking::where('bank', $record->bank)
                            ->whereNull('deleted_at')
                            ->where('id', '<', $record->id)
                            ->orderBy('id', 'desc')
                            ->first();

                        if ($previous_bank_record) {
                            flash("Recursive update based on previous_bank_record: " . $previous_bank_record->id . "!")->success();
                            update_banking_record_balances(Carbon::parse($previous_bank_record->trans_date)->toDateString(), $record->bank, $previous_bank_record->id, $previous_bank_record->account_balance);
                        } else {
                            flash("Recursive update based on current_bank_record: " . $record->id . "!")->success();
                            update_banking_record_balances($expense_date, $record->bank, $record->id, $account_balance_on_expense_date_after_payment);
                        }
                    }
                }
            }
            return 'success';
        }
        return 'fail';
    }

    public function get_account_balance(Request $request)
    {
        $acc = DB::table('chart_of_accounts')->where('id', $request->bank_id)->get()->toArray();
        return $acc;
    }

    public function __get_payment_item_details(Request $request)
    {

        $item = DB::table('payment_items')->where('id', $request->item_id)->get()->toArray();
        foreach ($item as $i) {
            $account = get_name($i->account_id, 'id', 'name', 'chart_of_accounts');
            $unit_cost = $i->unit_cost;
        }
        return array($item, $account, $unit_cost);
    }

    public function get_payment_item_details(Request $request)
    {

        $response_text = "";

        $item = DB::table('payment_items')->where('id', $request->item_id)->first();

        $response_text .= "<div class='form-inline'>";

        $response_text .= "<div class='form-group' style='margin-left: 70px'>";
        // $response_text .= "<label>Quantity:</label>";
        $response_text .= "<input type='number' class='form-control compulsory' onchange = 'change_amt(this.value)' id='qty' name='qty[]' value='" . 1 . "'/>";
        $response_text .= "</div>";

        $response_text .= "<div class='form-group' style='margin-left: 40px'>";
        // $response_text .= "<label>Amount:</label>";
        $response_text .= "<input type='text' class='form-control compulsory amt' id='amt' readonly name='amt[]' value='" . $item->unit_cost . "'/>";
        $response_text .= "</div>";

        $response_text .= "<div class='form-group' style='margin-left: 40px'>";
        // $response_text .= "<label>Expense Account:</label>";
        $response_text .= "<input type='text' class='form-control compulsory' id='exs' readonly name='exs[]' value='" . get_name($item->account_id, 'id', 'name', 'chart_of_accounts') . "'/>";
        $response_text .= "<input type='hidden' class='form-control compulsory' id='unit_cost' readonly name='unit_cost[]' value='" . $item->unit_cost . "'/>";
        $response_text .= "<input type='hidden' class='form-control compulsory' id='account_id' readonly name='account_id[]' value='" . $item->account_id . "'/>";

        $response_text .= "</div>";

        $response_text .= "</div>";

        return $response_text;
    }

    public function get_expense_acc(Request $request)
    {

        $item = PaymentItem::where('id', $request->item_id)->first();
        $expense_acc = ChartOfAccount::where('id', $item->account_id)->first();
        $payable_acc = ChartOfAccount::where('id', $item->payable_account)->first();

        return array($expense_acc, $payable_acc);
    }

    public function total_price(Request $request)
    {

        $unit_cost = get_name($request->item_id, 'id', 'unit_cost', 'payment_items');
        $quantity = $request->quantity;
        $amount = (int)$unit_cost * (int)$quantity;
        return array($amount, $unit_cost);
    }

    public function store_bill_payment(Request $request) {
        $logged_in_user = Auth::id();

        $bill_update = HospitalBill::find($request->bill_id);

        $payment_memo = (isset($request->payment_memo) && $request->payment_memo != "") ? $request->payment_memo : "N/A";

        $track_receipt = new TrackReceipt;
        $track_receipt->reason = "Bill Payment on Bill number " . $bill_update->bill_number;
        $track_receipt->created_by = $logged_in_user;
        $track_receipt->save();
        $receipt_number = sprintf("%04u", $track_receipt->id);

        $bill_update->balance = (int)$request->bill_balance;

        $date_paid_history = unserialize($bill_update->date_paid_history);
        array_push($date_paid_history, $request->payment_date);
        $date_paid_serial = serialize($date_paid_history);

        $amount_paid_history = unserialize($bill_update->amount_paid_history);
        array_push($amount_paid_history, (int)$request->amount_to_pay);
        $amount_paid_serial = serialize($amount_paid_history);

        $staff_incharge_history = unserialize($bill_update->staff_incharge_history);
        array_push($staff_incharge_history, Auth::id());
        $staff_in_charge_serial = serialize($staff_incharge_history);

        $receipt_history = unserialize($bill_update->receipt_history);
        array_push($receipt_history, $receipt_number);
        $receipt_serial = serialize($receipt_history);

        $balance_history = unserialize($bill_update->balance_history);
        array_push($balance_history, (int)$request->bill_balance);
        $balance_serial = serialize($balance_history);

        $bill_update->amount_paid_history = $amount_paid_serial;
        $bill_update->date_paid_history = $date_paid_serial;
        $bill_update->staff_incharge_history = $staff_in_charge_serial;
        $bill_update->receipt_history = $receipt_serial;
        $bill_update->balance_history = $balance_serial;

        $bill_update->payment_status = 1;
        $bill_update->updated_by = $logged_in_user;
        $bill_update->update();

        clearBill($request->bill_id);

        $item_id_array = explode(',', $bill_update->item_ids);
        $item_accounts = ($bill_update->item_accounts != '' && $bill_update->item_accounts != null) ? $bill_update->item_accounts : '' . $bill_update->payable_account;
        $items_quantity_array = explode(',', $bill_update->item_quantities);
        $items_amount_array = explode(',', $bill_update->item_subtotals);

        $account_balance = ((int)$request->current_account_balance - (int)$request->amount_to_pay);
        ChartOfAccount::where('id', $request->bank_account)->update(['balance' => $account_balance]);

        // insert this payment
        $payment_date = Carbon::parse($request->payment_date)->toDateString();
        $account_balance_record_on_expense_date = get_latest_banking_record_based_on_transaction_date($request->bank_account, $payment_date);
        $account_balance_on_expense_date = (int)$account_balance_record_on_expense_date->account_balance;
        $account_balance_on_expense_date_after_payment = ($account_balance_on_expense_date - (int)$request->amount_to_pay);
        $last_insert_id = capture_bank_record(
            'PAYMENT',
            $payment_date,
            $request->bank_account,
            $item_accounts,
            $account_balance_on_expense_date_after_payment,
            0,
            (int)$request->amount_to_pay,
            $payment_memo,
            $receipt_number
        );

        update_banking_record_balances($payment_date, $request->bank_account, $last_insert_id, $account_balance_on_expense_date_after_payment);

        $bill_payment = new Payment;
        $bill_payment->item_id = $item_id_array[0];
        $bill_payment->vendor = $bill_update->vendor;
        $bill_payment->unit_cost = get_name($item_id_array[0], 'id', 'unit_cost', 'payment_items');
        $bill_payment->amount = (int)$request->amount_to_pay;
        $bill_payment->quantity = $items_quantity_array[0];
        $bill_payment->memo = $payment_memo;
        $bill_payment->account_balance = $account_balance;
        $bill_payment->transaction_id = $receipt_number;
        $bill_payment->account_id = $request->bank_account;
        $bill_payment->created_by = $logged_in_user;
        $bill_payment->expense_date = Carbon::parse($request->payment_date)->toDateTimeString();
        $bill_payment->bill_id = $request->bill_id;

        if ($bill_update->bill_type != "ASSETS") {
            $bill_payment->expense_account = get_name($item_id_array[0], 'id', 'account_id', 'payment_items');
        }

        $bill_payment->save();

        $accounts_payable_balance = ChartOfAccount::find(14);
        ChartOfAccount::where('id', 14)->update(['balance' => (int)$accounts_payable_balance->balance - (int)$request->amount_to_pay]);

        return (int)$request->bill_balance;
    }

    public function create_bills()
    {

        $suppliers = Supplier::orderBy('name', 'asc')->get();
        $staff_members = User::orderBy('first_name', 'asc')->get();
        $payments = [];
        $banks = DB::table('chart_of_accounts')->whereNull('deleted_at')->where('type', 4)->orderBy('name', 'asc')->get()->toArray();
        $items = DB::table('payment_items')->whereNull('deleted_at')->orderBy('name', 'asc')->get()->toArray();
        $hospital_information = HospitalInformation::first();

        return view('expenses::payments.bills.create', compact(
            'staff_members',
            'suppliers',
            'hospital_information',
            'payments',
            'banks',
            'items'
        ));
    }

    public function edit_bill($id)
    {
        $suppliers = Supplier::orderBy('name', 'asc')->pluck('name', 'id')->prepend('-select-', '')->toArray();
        $staff_members = User::orderBy('first_name', 'asc')->get();
        $banks = DB::table('chart_of_accounts')->whereNull('deleted_at')->where('type', 4)->orderBy('name', 'asc')->get()->toArray();
        $payment_items = PaymentItem::orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $chart_of_accounts = ChartOfAccount::orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $option_items_array = DB::table('payment_items')->whereNull('deleted_at')->orderBy('name', 'asc')->get()->toArray();
        $option_suppliers_array = DB::table('suppliers')->where('available', 1)->whereNull('deleted_at')->orderBy('name', 'asc')->get()->toArray();
        $hospital_information = HospitalInformation::first();
        $bill = HospitalBill::find($id);
        $payments = Payment::where('bill_id', $id)->get();

        return view('expenses::payments.bills.edit', compact(
            'staff_members',
            'suppliers',
            'hospital_information',
            'payments',
            'option_items_array',
            'chart_of_accounts',
            'option_suppliers_array',
            'banks',
            'payment_items',
            'bill'
        ));
    }

    public function update_bill(Request $request, $id)
    {

        $validator = Validator::make($request->all(), [
            'vendor' => 'required',
            'bill_date' => 'required',
            'bill_number' => 'required',
            'bill_due_date' => 'required',
            'bill_memo' => 'required',
        ]);

        if ($validator->fails()) {
            $string = "";
            foreach ($validator->errors()->getMessages() as $item) {
                $string .= "{$item[0]}<br>";
            }
            flash($string)->error();
            return back()->withErrors($validator)->withInput();
        } else {
            if ($request->bill_action == 'save') {

                $logged_in_user = Auth::id();
                $bill_date = Carbon::parse($request->bill_date)->toDateString();
                $bill_due_date = Carbon::parse($request->bill_due_date)->toDateString();

                $bill = HospitalBill::find($id);
                $bill->vendor = $request->vendor;
                $bill->bill_date = $bill_date;
                $bill->bill_term = $request->bill_term;
                $bill->bill_memo = $request->bill_memo;
                $bill->bill_number = $request->bill_number;
                $bill->bill_due_date = $bill_due_date;
                $bill->total_amount = (int)$request->total_amount;
                $bill->item_ids = implode(',', $request->item_id);
                $bill->item_accounts = implode(',', $request->expense_acc_id);
                $bill->item_quantities = implode(',', $request->quantity);
                $bill->item_subtotals = implode(',', $request->amount);
                $bill->payable_account = implode(',', $request->payable_acc_id);
                $bill->created_by = $logged_in_user;
                $bill->bill_type = 'PAY';

                // update the bill balance
                $item_amounts_paid = array_map('intval', explode(',', $bill->item_amount_paid));
                $amount_paid = array_sum($item_amounts_paid);
                $bill->balance = (int)$request->total_amount - $amount_paid;

                $track_invoice = new TrackInvoice;
                $track_invoice->reason = $request->bill_memo;
                $track_invoice->created_by = $logged_in_user;

                if ($bill->save() && $track_invoice->save()) {

                    flash('Bill has successfully been Updated.')->info();
                } else {

                    flash('Failed to save Bill.')->error();
                }
                return redirect()->route('payments.bills');
            }
        }
    }

    public function save_bill(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'vendor' => 'required',
            'bill_date' => 'required',
            'bill_number' => 'required',
            'bill_due_date' => 'required',
            'bill_memo' => 'required',
        ]);

        if ($validator->fails()) {
            $string = "";
            foreach ($validator->errors()->getMessages() as $item) {
                $string .= "{$item[0]}<br>";
            }
            flash($string)->error();
            return back()->withErrors($validator)->withInput();
        } else {
            if ($request->bill_action == 'save') {

                $logged_in_user = Auth::id();
                $bill_date = Carbon::parse($request->bill_date)->toDateString();
                $bill_due_date = Carbon::parse($request->bill_due_date)->toDateString();

                $bill = new HospitalBill;
                $bill->vendor = $request->vendor;
                $bill->bill_date = $bill_date;
                $bill->bill_term = $request->bill_term;
                $bill->bill_memo = $request->bill_memo;
                $bill->bill_number = $request->bill_number;
                $bill->bill_due_date = $bill_due_date;
                $bill->total_amount = (int)$request->total_amount;
                $bill->item_ids = implode(',', $request->item_id);
                $bill->item_accounts = implode(',', $request->expense_acc_id);
                $bill->item_quantities = implode(',', $request->quantity);
                $bill->item_subtotals = implode(',', $request->amount);
                $bill->payable_account = implode(',', $request->payable_acc_id);
                $bill->created_by = $logged_in_user;
                $bill->bill_type = 'PAY';

                $bill->balance_history = serialize(array());
                $bill->receipt_history = serialize(array());
                $bill->staff_incharge_history = serialize(array());
                $bill->amount_paid_history = serialize(array());
                $bill->date_paid_history = serialize(array());

                $track_invoice = new TrackInvoice;
                $track_invoice->reason = $request->bill_memo;
                $track_invoice->created_by = $logged_in_user;

                if ($bill->save() && $track_invoice->save()) {
                    // TODO: tag the correct accounts payable each time
                    // Note that multiple items can be selected when paying a bill and can be linked to different accounts payables
                    // CC: @koomabenjamin
                    $accounts_payable_balance = ChartOfAccount::find(14);
                    ChartOfAccount::where('id', 14)->update(['balance' => (int)$request->total_amount + (int)$accounts_payable_balance->balance]);
                    flash('Bill has successfully been saved.')->success();
                } else {
                    flash('Failed to save Bill.')->error();
                }
                return redirect()->route('payments.bills');
            }
        }
    }

    public function save_inventory_bill(Request $request)
    {

        $validator = Validator::make($request->all(), [
            'vendor' => 'required',
            'bill_date' => 'required',
            'bill_number' => 'required',
            'bill_due_date' => 'required',
            'bill_memo' => 'required',
        ]);

        if ($validator->fails()) {
            $string = "";
            foreach ($validator->errors()->getMessages() as $item) {
                $string .= "{$item[0]}<br>";
            }
            flash($string)->error();
            // return back()->withErrors($validator)->withInput();
            return redirect()->route('payments.bills.inventory');
        } else {
            $logged_in_user = Auth::id();
            $bill_date = Carbon::parse($request->bill_date)->toDateString();
            $bill_due_date = Carbon::parse($request->bill_due_date)->toDateString();

            /* == start:delete this existing temporary bill that was attached to quotation used for enforcing double entry === */
            $quotation_record = Quotation::where('quotation_number', $request->quotation_number)->first();
            $dentals_radiologies_and_general_items_expe_accounts = "";
            $item_type = null;
            if($quotation_record){
                $temp_bill_id_to_delete = $quotation_record->bill_id;
                $bill_to_delete = HospitalBill::find($temp_bill_id_to_delete);

                if($bill_to_delete){
                    $item_type = $bill_to_delete->quotation_type_id;
                    $dentals_radiologies_and_general_items_expe_accounts = $bill_to_delete->item_accounts;
                    $bill_to_delete->delete();
                    $restore_order = Quotation::where('quotation_number', $request->quotation_number)
                        ->update(['bill_id' => null, 'invoice_generated' => null, 'invoice_date' => null, 'invoice_number' => null]);
                }
            }
            /* =============== end: ==================== */


            $bill = new HospitalBill;
            $bill->vendor = $request->vendor;
            $bill->bill_date = $bill_date;
            $bill->bill_term = $request->bill_term;
            $bill->bill_memo = $request->bill_memo;
            $bill->bill_number = $request->bill_number;
            $bill->bill_due_date = $bill_due_date;
            $bill->total_amount = (int)$request->total_amount;
            $bill->item_ids = implode(',', $request->item_id);
            $bill->item_accounts = in_array($item_type, [1,2]) ? implode(',', $request->expense_acc_id) : $dentals_radiologies_and_general_items_expe_accounts;
            $bill->item_quantities = implode(',', $request->quantity);
            $bill->item_subtotals = implode(',', $request->amount);
            $bill->created_by = $logged_in_user;

            $bill->balance_history = serialize(array());
            $bill->receipt_history = serialize(array());
            $bill->staff_incharge_history = serialize(array());
            $bill->amount_paid_history = serialize(array());
            $bill->date_paid_history = serialize(array());

            $track_invoice = new TrackInvoice;
            $track_invoice->reason = $request->bill_memo;
            $track_invoice->created_by = $logged_in_user;

            switch ($request->quotation_type_id) {
                case 1:
                    $bill->bill_type = 'DRU';
                    break;
                case 2:
                    $bill->bill_type = 'SUN';
                    break;
                case 3:
                    $bill->bill_type = 'DEN';
                    break;
                case 4:
                    $bill->bill_type = 'RAD';
                    break;
                case 5:
                    $bill->bill_type = 'LAB';
                    break;
                case 6:
                    $bill->bill_type = 'GEN';
                    break;
                case 7:
                    $bill->bill_type = 'EYE';
                    break;
                default:
                    // bill type is supposed to be defined
                    throw new \Exception("Bill Type was not found");
            }

            if ($bill->save() && $track_invoice->save()) {
                $accounts_payable_balance = ChartOfAccount::find(14);
                ChartOfAccount::where('id', 14)->update(['balance' => (int)$request->total_amount + (int)$accounts_payable_balance->balance]);
                flash('Bill has successfully been saved.')->success();
            } else {
                flash('Failed to save Bill.')->error();
            }

            $update = Quotation::where('quotation_number', $request->quotation_number)
                ->update(['bill_id' => $bill->id, 'invoice_generated' => 1, 'invoice_date' => $request->bill_date, 'invoice_number' => $request->bill_number]);
            // ->update(['invoice_generated' => 1, 'invoice_date' => $request->bill_date, 'invoice_number' => $request->bill_number]);

            return redirect('/payments/bills/inventory');
        }
    }

    public function voucher($id) {
        $payments = Payment::where('bill_id', $id)->groupBy('transaction_id')->get();
        $hospital_information = HospitalInformation::first();
        return view('expenses::payments.bills.voucher', compact('payments', 'hospital_information'));
    }

    public function get_bill_number()
    {
        return generateInvoiceNumberFromDB("Get Bill Number");
    }

    public function bills(Request $request) {
        $banks = ChartOfAccount::where('type', 4)->get();
        $suppliers = Supplier::get();
        $staff_members = User::get();
        $display = "";
        $bank_accounts = ChartOfAccount::where('type', 4)->pluck('name', 'id')->prepend('-select-', '')->toArray();
        $filters = [];

        if ($request->dates == "today") {
            $filters[] = ['bill_date', '=', date('Y-m-d')];
            $display .= "Today | ";
        } elseif ($request->dates == "yesterday") {
            $filters[] = ['bill_date', '=', date("Y-m-d", strtotime("yesterday"))];
            $display .= "Yesterday | ";
        } elseif ($request->dates == "custom_date") {
            $filters[] = ['bill_date', '=', date('Y-m-d', strtotime($request->start_date))];
            $display .= "On: " . streamline_date($request->start_date) . " | ";
        } elseif ($request->dates == "custom_date_range") {
            $filters[] = ['bill_date', '>=', date('Y-m-d', strtotime($request->start_date))];
            $filters[] = ['bill_date', '<=', date('Y-m-d', strtotime($request->end_date))];
            $display .= "From: " . streamline_date($request->start_date) . " To: " . streamline_date($request->end_date) . " | ";
        }

        if ($request->vendor != "ALL VENDORS") {
            $filters[] = ['vendor', '=', $request->vendor];
            $display .= "Vendor: " . get_name($request->vendor, 'id', 'name', 'suppliers') . " | ";
        } else {
            $display .= "All Vendors | ";
        }

        if ($request->staff_member != "ALL STAFF") {
            $filters[] = ['created_by', '=', $request->staff_member];
            $display .= "Staff: " . get_full_name($request->staff_member, 'id', 'first_name', 'last_name', 'users') . " | ";
        } else {
            $display .= "All Staff | ";
        }

        if ($request->bill_status == "paid") {
            $display .= 'Paid Bills';
            $filters[] = ['balance', '=', 0];
        } elseif ($request->bill_status == "unpaid") {
            $display .= 'Unpaid Bills';
            $filters[] = ['balance', '=', NULL];
        } elseif ($request->bill_status == "paid_but_with_balance") {
            $display .= 'Paid Bills with balance';
            $filters[] = ['balance', '>', 0];
        } else {
            $display .= 'All Bills';
        }

        $bills = DB::table('hospital_bills')->whereNull('deleted_at')->where($filters)->get()->toArray();

        return view('expenses::payments.bills.index', compact('bills', 'staff_members', 'suppliers', 'display', 'banks', 'request', 'bank_accounts'));
    }

    public function bills_bulk_pay(Request $request)
    {
        $bill_id_array = explode(',', $request->selected_bill_ids);
        $deductions = $bill_deductions = [];
        $logged_in_user = Auth::id();

        $track_receipt = new TrackReceipt;
        $track_receipt->reason = "Bulk Bill Payment";
        $track_receipt->created_by = $logged_in_user;
        $track_receipt->save();
        $receipt_number = sprintf("%04u", $track_receipt->id);

        $bill_amount_paid = (int)$request->amount_to_pay + (int)$request->total_amount_paid_off;

        // split amounts for the bills

        for ($i = 0; $i < count($bill_id_array); $i++) {

            $bill = HospitalBill::find($bill_id_array[$i]);
            $bill_total = $bill->total_amount;
            $bill_balance = $bill->balance;
            $item_amount_paid = [];
            $item_balance_remaining = [];
            $items_array = explode(',', $bill->item_ids);
            $items_quantity_array = explode(',', $bill->item_quantities);
            $items_subtotal_array = explode(',', $bill->item_subtotals);

            for ($x = 0; $x < count($items_array); $x++) {

                $new_amount = $bill_amount_paid - array_sum($deductions);

                $bill_payment = new Payment;

                if ($items_subtotal_array[$x] <= $new_amount) {

                    $item_amount_paid[] = $items_subtotal_array[$x];
                    $item_balance_remaining[] = 0;
                    $deductions[] = $items_subtotal_array[$x];
                    $bill_payment->amount = $items_subtotal_array[$x];
                } else {

                    $item_amount_paid[] = $new_amount;
                    $item_balance_remaining[] = (int)$items_subtotal_array[$x] - (int)$new_amount;
                    $deductions[] = $new_amount;
                    $bill_payment->amount = $new_amount;
                }

                if ($bill->bill_type == "PAY") {

                    $bill_payment->item_id = $items_array[$x];
                    $bill_payment->vendor = $bill->vendor;
                    $bill_payment->unit_cost = get_name($items_array[$x], 'id', 'unit_cost', 'payment_items');
                    $bill_payment->quantity = $items_quantity_array[$x];
                    $bill_payment->memo = 'A portion of a Bulk Payment';
                    $bill_payment->account_balance = 0;
                    $bill_payment->transaction_id = $receipt_number;
                    $bill_payment->account_id = $request->bank_account;
                    $bill_payment->created_by = $logged_in_user;
                    $bill_payment->expense_date = Carbon::parse($request->payment_date)->toDateTimeString();
                    $bill_payment->bill_id = $bill->id;
                    $bill_payment->expense_account = get_name($items_array[$x], 'id', 'account_id', 'payment_items');
                    $bill_payment->save();
                }
            }

            HospitalBill::where('id', $bill_id_array[$i])->update([
                'balance' => array_sum($item_balance_remaining),
                'item_amount_paid' => implode(',', $item_amount_paid),
                'item_balance_remaining' => implode(',', $item_balance_remaining)
            ]);

            $date_paid_history = unserialize($bill->date_paid_history);
            array_push($date_paid_history, $request->payment_date);
            $date_paid_serial = serialize($date_paid_history);

            $amount_paid_history = unserialize($bill->amount_paid_history);
            array_push($amount_paid_history, array_sum($item_amount_paid));
            $amount_paid_serial = serialize($amount_paid_history);

            $staff_incharge_history = unserialize($bill->staff_incharge_history);
            array_push($staff_incharge_history, Auth::id());
            $staff_in_charge_serial = serialize($staff_incharge_history);

            $receipt_history = unserialize($bill->receipt_history);
            array_push($receipt_history, $receipt_number);
            $receipt_serial = serialize($receipt_history);

            $balance_history = unserialize($bill->balance_history);
            array_push($balance_history, array_sum($item_balance_remaining));
            $balance_serial = serialize($balance_history);

            $bill->amount_paid_history = $amount_paid_serial;
            $bill->date_paid_history = $date_paid_serial;
            $bill->staff_incharge_history = $staff_in_charge_serial;
            $bill->receipt_history = $receipt_serial;
            $bill->balance_history = $balance_serial;

            $bill->payment_status = 1;
            $bill->updated_by = $logged_in_user;
            $bill->save();
        }

        if (Carbon::parse($request->payment_date)->toDateString() < Carbon::today()->toDateString()) {
            $to_banking_records = Banking::where('bank', $request->transfer_to)->where('trans_date', '>', Carbon::parse($request->transfer_date)->toDateString())->get();
            $from_banking_records = Banking::where('bank', $request->transfer_from)->where('trans_date', '>', Carbon::parse($request->transfer_date)->toDateString())->get();

            foreach ($to_banking_records as $record) {
                Banking::where('id', $record->id)->update(['account_balance' => ((int)$record->account_balance + (int)$request->transfer_amount)]);
            }

            foreach ($from_banking_records as $record) {
                Banking::where('id', $record->id)->update(['account_balance' => ((int)$record->account_balance - (int)$request->transfer_amount)]);
            }
        }

        // record bank transfers / payments
        capture_bank_record(
            'PAYMENT',
            Carbon::parse($request->payment_date)->toDateString(),
            $request->bank_account,
            "",
            ((int)$request->account_balance - (int)$request->amount_to_pay),
            0,
            (int)$request->amount_to_pay,
            $request->payment_memo,
            $receipt_number
        );

        return redirect()->route('payments.bills');
    }

    public function delete_bill(Request $request)
    {

        $bill_id = $request->bill_id;
        $bill = HospitalBill::find($bill_id);

        if ($bill) {
            $accounts_payable_balance = ChartOfAccount::find(14);
            ChartOfAccount::where('id', 14)->update(['balance' => (int)$accounts_payable_balance->balance - (int)$bill->total_amount]);
            Quotation::where('bill_id', $bill_id)->update(['bill_id' => null, 'invoice_generated' => 0, 'invoice_date' => null, 'invoice_number' => null]);
            $bill->delete();
            return 'success';
        } else {
            return 'fail';
        }
    }

    public function get_bill_details($id)
    {
        $bill = HospitalBill::find($id);
        //dd($bill);
        return response()->json($bill);
    }

    public function bills_inactive()
    {
        $bills = HospitalBill::onlyTrashed()->orderBy('created_at', 'asc')->paginate(50);
        $banks = ChartOfAccount::where('type', 4)->get();
        $suppliers = Supplier::get();
        $staff_members = User::get();

        if (empty($bills)) {
            flash()->error("There is no inactive bills");
            return redirect('/payments/bills/');
        } else {
            return view('expenses::payments.bills.inactive', compact('bills', 'staff_members', 'suppliers', 'banks'));
        }
    }

    public function bill_activate($id)
    {
        $bill = HospitalBill::withTrashed()->find($id);
        $accounts_payable_balance = ChartOfAccount::find(14);
        ChartOfAccount::where('id', 14)->update(['balance' => (int)$accounts_payable_balance->balance - (int)$bill->total_amount]);

        if ($bill->restore()) :
            flash("Bill has been activated.")->success();
            return redirect('/payments/bills/inactive');
        endif;
    }

    public function inventory(Request $request) {
        $suppliers = Supplier::get();
        $staff_members = User::get();
        $display = "";
        $filters = [];

        if ($request->dates == "yesterday") {
            $start = Carbon::yesterday()->startOfDay();
            $end = Carbon::yesterday()->endOfDay();
            $display .= "Yesterday | ";
        } elseif ($request->dates == "custom_date") {
            $end = Carbon::parse($request->start_date)->endOfDay()->toDateTimeString();
            $start = Carbon::parse($request->start_date)->startOfDay()->toDateTimeString();
            $display .= "On: " . streamline_date($request->start_date) . " | ";
        } elseif ($request->dates == "custom_date_range") {
            $end = Carbon::parse($request->end_date)->endOfDay();
            $start = Carbon::parse($request->start_date)->startOfDay();
            $display .= "From: " . streamline_date($request->start_date) . " To: " . streamline_date($request->end_date) . " | ";
        } else {
            $start = Carbon::today()->startOfDay();
            $end = Carbon::today()->endOfDay();
            $display .= "Today | ";
        }

        if ($request->vendor != "ALL VENDORS") {
            $filters[] = ['supplier_id', '=', $request->vendor];
            $display .= "Vendor: " . get_name($request->vendor, 'id', 'name', 'suppliers') . " | ";
        } else {
            $display .= "All Vendors | ";
        }

        if ($request->staff_member != "ALL STAFF") {
            $filters[] = ['created_by', '=', $request->staff_member];
            $display .= "Staff: " . get_full_name($request->staff_member, 'id', 'first_name', 'last_name', 'users');
        } else {
            $display .= "All Staff";
        }

        $quotations = Quotation::whereBetween('receive_date', [$start, $end])->where($filters)
            ->where('receive_status', 1)
            ->where('invoice_generated', 0)
            ->groupBy('quotation_number')
            ->get();

        return view('expenses::payments.inventory.index', compact('quotations', 'staff_members', 'suppliers', 'display'));
    }

    public function create_inventory_bill(Request $request)
    {
        $suppliers = Supplier::get();
        $staff_members = User::get();
        $chart_of_accounts = ChartOfAccount::get();
        $quotation_type_options = QuotationType::pluck('name', 'id')->toArray();
        $quotation_number = $request->quotation_number;
        $quotations = Quotation::where('quotation_number', $quotation_number)->get();
        $quotation = Quotation::where('quotation_number', $quotation_number)->first();

        return view('expenses::payments.inventory.create', compact(
            'quotations',
            'quotation',
            'quotation_type_options',
            'quotation_number',
            'suppliers',
            'staff_members',
            'chart_of_accounts'
        ));
    }

    public function custom_bills($vendor, $category)
    {
        $bills = [];
        $request = new Request();
        $banks = ChartOfAccount::where('type', 4)->get();
        $suppliers = Supplier::get();
        $staff_members = User::get();
        $hospital_information = HospitalInformation::first();
        $bank_accounts = ChartOfAccount::where('type', 4)->pluck('name', 'id')->prepend('-select-', '')->toArray();

        $today = Carbon::now()->toDateString();
        $today_minus_thirty = Carbon::now()->subDays(30)->toDateString();
        $today_minus_sixty = Carbon::now()->subDays(60)->toDateString();
        $today_minus_ninety = Carbon::now()->subDays(90)->toDateString();

        $display = get_name($vendor, 'id', 'name', 'suppliers') . ' - UNPAID BILLS AND PAID BILLS (BUT WITH BALANCE) ';

        $request->staff_member = "ALL STAFF";
        $request->vendor = $vendor;
        $request->bill_status = "UNPAID BILLS";
        $request->dates = 'custom_date_range';
        $request->start_date = $today;
        $request->end_date = $today;

        switch ($category) {
            case 'current':
                $display .= " for today, the " . streamline_date($today);
                $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor = {$vendor} AND bill_date = '{$today}' ORDER BY id ASC";
                if ($vendor == 0) {
                    $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor IS NULL AND bill_date = '{$today}' ORDER BY id ASC";
                }
                $bills = DB::select($bills_query);
                break;

            case 'one_to_thirty':
                $request->start_date = $today_minus_thirty;
                $display .= " from " . streamline_date($today_minus_thirty) . " to " . streamline_date($today);
                $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor = {$vendor} AND bill_date BETWEEN '{$today_minus_thirty}' AND '{$today}' ORDER BY id ASC";
                if ($vendor == 0) {
                    $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor IS NULL AND bill_date BETWEEN '{$today_minus_thirty}' AND '{$today}' ORDER BY id ASC";
                }
                $bills = DB::select($bills_query);
                break;

            case 'thirty_one_to_sixty':
                $request->start_date = $today_minus_sixty;
                $request->end_date = $today_minus_thirty;
                $display .= " from " . streamline_date($today_minus_sixty) . " to " . streamline_date($today_minus_thirty);
                $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor = {$vendor} AND bill_date BETWEEN '{$today_minus_sixty}' AND '{$today_minus_thirty}' ORDER BY id ASC";
                if ($vendor == 0) {
                    $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor IS NULL AND bill_date BETWEEN '{$today_minus_sixty}' AND '{$today_minus_thirty}' ORDER BY id ASC";
                }
                $bills = DB::select($bills_query);
                break;

            case 'sixty_one_to_ninety':
                $request->start_date = $today_minus_ninety;
                $request->end_date = $today_minus_sixty;
                $display .= " from " . streamline_date($today_minus_ninety) . " to " . streamline_date($today_minus_sixty);
                $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor = {$vendor} AND bill_date BETWEEN '{$today_minus_ninety}' AND '{$today_minus_sixty}' ORDER BY id ASC";
                if ($vendor == 0) {
                    $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor IS NULL AND bill_date BETWEEN '{$today_minus_ninety}' AND '{$today_minus_sixty}' ORDER BY id ASC";
                }
                $bills = DB::select($bills_query);
                break;

            case 'ninety_one_and_over':
                $request->start_date = Carbon::now()->startOfYear()->toDateString();
                $request->end_date = $today_minus_ninety;
                $display .= " before " . streamline_date($today_minus_ninety);
                $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor = {$vendor} AND bill_date < '{$today_minus_ninety}' ORDER BY id ASC";
                if ($vendor == 0) {
                    $bills_query  = "SELECT * FROM hospital_bills WHERE deleted_at IS NULL AND (balance IS NULL OR balance > 0) AND vendor IS NULL AND bill_date < '{$today_minus_ninety}' ORDER BY id ASC";
                }
                $bills = DB::select($bills_query);
                break;
        }

        return view('expenses::payments.bills.index', compact('bills', 'hospital_information', 'staff_members', 'suppliers', 'display', 'banks', 'request', 'bank_accounts'));
    }

    public function custom_bill($vendor, $category, $id)
    {
        $bills = [];
        $request = new Request();
        $banks = ChartOfAccount::where('type', 4)->get();
        $suppliers = Supplier::get();
        $staff_members = User::get();
        $hospital_information = HospitalInformation::first();
        $bank_accounts = ChartOfAccount::where('type', 4)->pluck('name', 'id')->prepend('-select-', '')->toArray();

        $today = Carbon::now()->toDateString();
        $today_minus_thirty = Carbon::now()->subDays(30)->toDateString();
        $today_minus_sixty = Carbon::now()->subDays(60)->toDateString();
        $today_minus_ninety = Carbon::now()->subDays(90)->toDateString();

        $display = get_name($vendor, 'id', 'name', 'suppliers') . ' - UNPAID BILLS AND PAID BILLS (BUT WITH BALANCE) ';

        $request->staff_member = "ALL STAFF";
        $request->vendor = $vendor;
        $request->bill_status = "UNPAID BILLS";
        $request->dates = 'custom_date_range';
        $request->start_date = $today;
        $request->end_date = $today;

        if ($vendor == 0) {
            $vendor = null;
        }

        $bills = DB::table('hospital_bills')->where('id', $id)->get()->toArray();

        switch ($category) {
            case 'current':
                $display .= " for today, the " . streamline_date($today);
                break;

            case 'one_to_thirty':
                $request->start_date = $today_minus_thirty;
                $display .= " from " . streamline_date($today_minus_thirty) . " to " . streamline_date($today);
                break;

            case 'thirty_one_to_sixty':
                $request->start_date = $today_minus_sixty;
                $request->end_date = $today_minus_thirty;
                $display .= " from " . streamline_date($today_minus_sixty) . " to " . streamline_date($today_minus_thirty);
                break;

            case 'sixty_one_to_ninety':
                $request->start_date = $today_minus_ninety;
                $request->end_date = $today_minus_sixty;
                $display .= " from " . streamline_date($today_minus_ninety) . " to " . streamline_date($today_minus_sixty);
                break;

            case 'ninety_one_and_over':
                $request->start_date = Carbon::now()->startOfYear()->toDateString();
                $request->end_date = $today_minus_ninety;
                $display .= " before " . streamline_date($today_minus_ninety);
                break;
        }

        return view('expenses::payments.bills.index', compact('bills', 'hospital_information', 'staff_members', 'suppliers', 'display', 'banks', 'request', 'bank_accounts'));
    }

    public function undo_bill_payment($transaction_id) {
        $payment = Payment::where('transaction_id', $transaction_id)->get();

        if (isset($payment[0])) {
            $amount = $payment[0]->amount;
            $bill_id = $payment[0]->bill_id;
            $account_id = $payment[0]->account_id;

            if (Payment::where('transaction_id', $transaction_id)->delete()) {
                $bill_update = HospitalBill::find($bill_id);
                $new_bill_balance = $bill_update->balance + $amount;
                $bill_update->balance = $new_bill_balance;
                $bill_update->payment_status = 0;
                $bill_update->updated_by = Auth::id();
                $bill_update->save();

                // update general payables balance
                $accounts_payable_balance = ChartOfAccount::find(14);
                ChartOfAccount::where('id', 14)->update(['balance' => (int)$accounts_payable_balance->balance + $amount]);

                // Delete related bank entry
                $bank_record = Banking::where('bank', $account_id)
                    ->where('trans_id', $transaction_id)
                    ->where('trans_type', 'PAYMENT')
                    ->where('debit', $amount)

                    ->first();

                $account_balance_record_on_expense_date = get_latest_banking_record_based_on_transaction_date($bank_record->bank, $bank_record->trans_date);
                $account_balance_on_expense_date = ($account_balance_record_on_expense_date != null) ? (int)$account_balance_record_on_expense_date->account_balance : 0;
                $account_balance_on_expense_date_after_payment_reversal = ($account_balance_on_expense_date + $amount);

                $bank_record->debit = 0;
                $bank_record->account_balance = $account_balance_on_expense_date_after_payment_reversal;
                $bank_record->updated_by = Auth::id();
                $bank_record->update();
                flash("Bank Payment record: " . $bank_record->id . " updated!");

                // use the bank record before the one just deleted
                $previous_bank_record = Banking::where('bank', $bank_record->bank)
                    ->whereNull('deleted_at')
                    ->where('id', '<', $bank_record->id)
                    ->orderBy('id', 'desc')
                    ->first();

                if ($previous_bank_record) {
                    update_banking_record_balances(Carbon::parse($previous_bank_record->trans_date)->toDateString(), $bank_record->bank, $previous_bank_record->id, $previous_bank_record->account_balance);
                } else {
                    update_banking_record_balances(Carbon::parse($bank_record->trans_date)->toDateString(), $bank_record->bank, $bank_record->id, $account_balance_on_expense_date_after_payment_reversal);
                }
                flash("Payment has been deleted successfully from Bank: " . get_name($bank_record->bank, 'id', 'name', 'chart_of_accounts') . " and the bill balance has been update to " . ugandan_shillings($new_bill_balance))->success();
                return 'success';
            } else {
                return 'fail';
            }
        } else {
            return 'fail';
        }
    }
}