<?php

namespace Streamline\Services\WardManagement;

use Carbon\Carbon;
use Illuminate\Support\Facades\Auth;
use Streamline\Exceptions\ModelNotFoundException;
use Streamline\Models\Drug;
use Streamline\Models\WardTreatmentDispensation;

class WardTreatmentDispensationService
{
    public function __construct()
    {
    }

    /**
     * @throws ModelNotFoundException
     */
    public function saveDispensation(int $patient_id, int $episode_id, int $drug_id, int $quantity_given,
                                     int $ward_treatment_id, int $ward_id, $batch_id = null): bool|int
    {
        $drug_details = Drug::find($drug_id);

        if (!$drug_details) {
            throw new ModelNotFoundException("Drug not found: ${$drug_id}");
        }

        $drug_exists = WardTreatmentDispensation::where('episode_id', $episode_id)
            ->where('drug_id', $drug_id)->first();

        if (!$drug_exists) {
            $ward_treatments_dispensation = new WardTreatmentDispensation;
            $ward_treatments_dispensation->patient_id = $patient_id;
            $ward_treatments_dispensation->episode_id = $episode_id;
            $ward_treatments_dispensation->drug_id = $drug_id;
            $ward_treatments_dispensation->quantity_given = $quantity_given;
            $ward_treatments_dispensation->ward_treatment_id = $ward_treatment_id;
            $ward_treatments_dispensation->ward_id = $ward_id;
            $ward_treatments_dispensation->current_chart_of_account = $drug_details->account_id;
            $ward_treatments_dispensation->cost_price = $drug_details->cost_price;
            $ward_treatments_dispensation->inventory_account = $drug_details->inventory_account;
            $ward_treatments_dispensation->cost_of_goods_account = $drug_details->cost_of_goods_account;
            $ward_treatments_dispensation->batch_id = $batch_id;

            if(patient_insurance_status($patient_id) == 1){
                $drug_insurance_details = get_item_insurance_pricing($patient_id, $drug_id, 4, true, $ward_id);
                $drug_selling_price = $drug_insurance_details[2];
                $ward_treatments_dispensation->chi_price = $drug_insurance_details[1];
            } else {
                $price_list_id = is_patient_category_attached_to_price_list($patient_id);
                if ($price_list_id) {
                    $drug_selling_price = get_price_list_category_price($price_list_id, 3, $drug_id);
                } else {
                    $drug_selling_price = $drug_details->non_insured_price;
                }
            }

            $ward_treatments_dispensation->price = $drug_selling_price;
            $ward_treatments_dispensation->created_by = Auth::id();
            $dispensation_history = [[
                'entered_at' => Carbon::now()->toDateTimeString(),
                'entered_by' => Auth::id()
            ]];
            $ward_treatments_dispensation->dispensation_history = json_encode($dispensation_history);
        } else {
            $ward_treatments_dispensation = $drug_exists;
            $ward_treatments_dispensation->quantity_given = $ward_treatments_dispensation->quantity_given + $quantity_given;
            $ward_treatments_dispensation->updated_by = Auth::id();

            $dispensation_history = json_decode($ward_treatments_dispensation->dispensation_history, true);

            if (is_null($ward_treatments_dispensation->dispensation_history)) {
                $dispensation_history[] = [
                    'entered_at' => $ward_treatments_dispensation->created_at->toDateTimeString(),
                    'entered_by' => $ward_treatments_dispensation->created_by,
                ];
            }

            $dispensation_history[] = [
                'entered_at' => Carbon::now()->toDateTimeString(),
                'entered_by' => Auth::id(),
            ];
            $ward_treatments_dispensation->dispensation_history = json_encode($dispensation_history);
        }

        if ($ward_treatments_dispensation->save()) {
            return $ward_treatments_dispensation->id;
        } else {
            return false;
        }
    }
}