<?php

namespace Streamline\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Artisan;
use Illuminate\Support\Facades\DB;
use Streamline\Models\ChartOfAccount;
use Symfony\Component\Process\Process;

class DataExtractionController extends Controller  {
    
    public function select_data_type(){
        return view('data_extraction.select_data_type');
    }

    public function import_csv ($tag_id) {
        if ($tag_id == 3) {
            $tag_name = "drugs";
        } else if ($tag_id == 2) {
            $tag_name = "investigations";
        } else if ($tag_id == 4) {
            $tag_name = "procedures";
        } else if ($tag_id == 5) {
            $tag_name = "sundries";
        } else if ($tag_id == 6) {
            $tag_name = "services";
        } else {
            $tag_name = "None";
        }

        $chart_of_accounts = ChartOfAccount::where(['type' => 1])->orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $chart_of_accounts = ['' => '- select -'] + $chart_of_accounts;

        $cost_of_goods_accounts = ChartOfAccount::where(['type' => 7])->orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $cost_of_goods_accounts = ['' => '- select -'] + $cost_of_goods_accounts;

        $inventory_asset_accounts = ChartOfAccount::where(['type' => 10])->orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $inventory_asset_accounts = ['' => '- select -'] + $inventory_asset_accounts;
        
        return view('data_extraction.import_csv', compact('tag_id', 'tag_name', 'chart_of_accounts',
            'cost_of_goods_accounts', 'inventory_asset_accounts'));
    }

    public function import_csv_upload(Request $request) {
        $csv_data = file($request->file('file'));
        $file_destination_path = 'uploads/csv_imports/';

        // check if the csv has data
        if (count($csv_data) > 0) {
            $first_row_data = explode(",", $csv_data[0]);
            $number_of_columns_in_data = count($first_row_data);

            // check if the csv has the required number of columns
            if (!((in_array($request->tag_id, [2, 4, 6]) && $number_of_columns_in_data == 3) ||
                ($request->tag_id == 5 && $number_of_columns_in_data == 4) ||
                ($request->tag_id == 3 && $number_of_columns_in_data == 7))) {
                flash("The CSV you uploaded does not contain or contains more than all the required number of column fields")->error();
                return redirect('/data_extraction/import_csv/' . $request->tag_id);
            }

            $attach_path = $request->file('file');
            $file_name = $attach_path->getClientOriginalName();

            $attach_path->move($file_destination_path, $file_name);

            $account_id = NULL;
            $inventory_account = NULL;
            $cost_of_goods_account = NULL;

            switch ($request->tag_id) {
                case 2:
                case 4:
                case 6:
                    $account_id = $request->account_id;
                    break;
                case 5:
                case 3:
                    $account_id = $request->account_id;
                    $inventory_account = $request->inventory_account;
                    $cost_of_goods_account = $request->cog_account;
                    break;
            }

            $insert_id = DB::table('csv_imports_processes')->insertGetId([
                "csv_path" => $file_destination_path . $file_name,
                "tag_id" => $request->tag_id,
                "account_id" => $account_id,
                "inventory_account" => $inventory_account,
                "cost_of_goods_account" => $cost_of_goods_account,
                "has_price_list" => 0,
                "created_by" => Auth::id(),
                "created_at" => date('Y-m-d H:i:s')
            ]);

            $exit_code = Artisan::call("import:csv $insert_id");

            return redirect('/data_extraction/import_csv_progress/' . $insert_id);
        } else {
            flash("You have uploaded an empty CSV")->error();
            return redirect('/data_extraction/import_csv/' . $request->tag_id);
        }
    }

    public function import_price_list_csv_upload(Request $request) {
        $csv_data = file($request->file('file'));
        $file_destination_path = 'uploads/csv_imports/';

        // check if the csv has data
        if (count($csv_data) > 0) {
            $first_row_data = explode(",", $csv_data[0]);
            $number_of_columns_in_data = count($first_row_data);

            // check if the csv has the required number of columns
            if ($number_of_columns_in_data > 2) {

                for ($i = 1; $i < count($first_row_data); $i++){
                    // confirm that all patient categories exist
                    $category_id = get_name(trim($first_row_data[$i]), 'name', 'id', 'patient_categories');

                    if ($category_id == 'N/A') {
                        flash("The CSV you uploaded contains a patient category; " . $first_row_data[$i] . " which does not exist in Stre@mline")->error();
                        return redirect('/data_extraction/import_price_list_csv/' . $request->tag_id);
                    }
                }
            } else {
                flash("The CSV you uploaded does not contain or contains more than all the required number of column fields")->error();
                return redirect('/data_extraction/import_price_list_csv/' . $request->tag_id);
            }

            $attach_path = $request->file('file');
            $file_name = "pl_" . $attach_path->getClientOriginalName();

            $attach_path->move($file_destination_path, $file_name);

            $insert_id = DB::table('csv_imports_processes')->insertGetId([
                "csv_path" => $file_destination_path . $file_name,
                "tag_id" => $request->tag_id,
                "account_id" => 0,
                "inventory_account" => 0,
                "cost_of_goods_account" => 0,
                "has_price_list" => 1,
                "created_by" => Auth::id(),
                "created_at" => date('Y-m-d H:i:s')
            ]);

            $exit_code = Artisan::call("import:price_list $insert_id");

            return redirect('/data_extraction/import_csv_progress/' . $insert_id);
        } else {
            flash("You have uploaded an empty CSV")->error();
            return redirect('/data_extraction/import_csv/' . $request->tag_id);
        }
    }

    public function import_csv_progress($id) {
        return view('data_extraction.import_csv_progress', compact('id'));
    }

    public function fetch_progress($id) {
        $record = DB::table('csv_imports_processes')->where('id', $id)->first();

        return $record->records_completed;
    }

    public function import_price_list_csv ($tag_id) {
        if ($tag_id == 3) {
            $tag_name = "drugs";
        } else if ($tag_id == 2) {
            $tag_name = "investigations";
        } else if ($tag_id == 4) {
            $tag_name = "procedures";
        } else if ($tag_id == 5) {
            $tag_name = "sundries";
        } else if ($tag_id == 6) {
            $tag_name = "services";
        } else {
            $tag_name = "None";
        }

        $chart_of_accounts = ChartOfAccount::where(['type' => 1])->orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $chart_of_accounts = ['' => '- select -'] + $chart_of_accounts;

        $cost_of_goods_accounts = ChartOfAccount::where(['type' => 7])->orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $cost_of_goods_accounts = ['' => '- select -'] + $cost_of_goods_accounts;

        $inventory_asset_accounts = ChartOfAccount::where(['type' => 10])->orderBy('name', 'asc')->pluck('name', 'id')->toArray();
        $inventory_asset_accounts = ['' => '- select -'] + $inventory_asset_accounts;

        return view('data_extraction.import_price_list_csv', compact('tag_id', 'tag_name', 'chart_of_accounts',
            'cost_of_goods_accounts', 'inventory_asset_accounts'));
    }

    public function start_process($id) {
        $exit_code = Artisan::call("import:csv $id");
    }

    public function start_price_list_process($id) {
        $exit_code = Artisan::call("import:price_list $id");
    }
}