<?php

namespace App\Exports\Sheets\Invoices;

use Illuminate\Support\Facades\DB;
use PhpOffice\PhpSpreadsheet\Cell\{
    Cell,
    DataType,
    StringValueBinder
};
use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
use Maatwebsite\Excel\Concerns\{
    FromCollection,
    WithHeadings,
    WithMapping,
    WithTitle,
    WithCustomValueBinder,
    WithEvents
};
use Maatwebsite\Excel\Events\AfterSheet;

class VOPSheet extends StringValueBinder implements
    FromCollection,
    WithHeadings,
    WithMapping,
    WithTitle,
    WithCustomValueBinder,
    WithEvents
{
    protected array $filters;
    protected int $no = 0;
    protected float $grandTotal = 0;

    protected array $benefits = [];

    protected $benefitAmounts;

    protected bool $benefitInitialized = false;


    public function __construct(array $filters = [])
    {
        $this->filters = $filters;
    }

    public function collection()
    {
        $query = DB::table('invoice_payments')
        ->leftJoin('invoice_payment_details', 'invoice_payment_details.invoice_payment_id', '=', 'invoice_payments.id')
        ->leftJoin('claim_requests', 'claim_requests.id', '=', 'invoice_payment_details.claim_request_id')
        ->leftJoin('request_logs', 'request_logs.id', '=', 'claim_requests.request_log_id')
        ->leftJoin('organizations', 'organizations.id', '=', 'request_logs.organization_id')
        ->leftJoin('members', 'members.id', '=', 'request_logs.member_id')
        ->leftJoin('specialities', 'specialities.id', '=', 'request_logs.specialities_id')
        ->leftJoin('icd', DB::raw("icd.code"), '=', DB::raw("SUBSTRING_INDEX(request_logs.diagnosis, ',', 1)"))
        ->orderBy('request_logs.service_code', 'desc')
        ->select(
            'invoice_payments.*',
            'organizations.name as organization_name',
            'members.name as member_name',
            'request_logs.diagnosis as code_diagnosis',
            'request_logs.service_code',
            'request_logs.dppj',
            'specialities.name as specialities_name',
            'request_logs.submission_date as in',
            'request_logs.discharge_date as out',
            'request_logs.code as code_log',
            'members.payor_id',
            'request_logs.nominal as amount',
            'claim_requests.request_log_id',
            'members.member_id as batch_number',
            'request_logs.keterangan',
            'icd.name as diagnosis',
            'request_logs.type_of_member'
        );


        if (!empty($this->filters['search'])) {
            $query->where('invoice_number', 'like', '%' . $this->filters['search'] . '%');
        }

        if (!empty($this->filters['start_date'])) {
            $query->whereDate('invoice_payments.created_at', '>=', $this->filters['start_date']);
        }

        if (!empty($this->filters['end_date'])) {
            $query->whereDate('invoice_payments.created_at', '<=', $this->filters['end_date']);
        }

        if (!empty($this->filters['orderBy'])) {
            $query->orderBy(
                $this->filters['orderBy'],
                $this->filters['order'] ?? 'asc'
            );
        }

        $items = $query->get();

        // ambil request_log_id
        $requestLogIds = $items
            ->pluck('request_log_id')
            ->filter()
            ->unique()
            ->values();

        // set benefit header (hanya yg dipakai)
        $this->benefits = DB::table('request_log_benefits')
            ->join('benefits', 'benefits.id', '=', 'request_log_benefits.benefit_id')
            ->whereIn('request_log_benefits.request_log_id', $requestLogIds)
            ->select('benefits.id', 'benefits.description')
            ->distinct()
            ->orderBy('benefits.id')
            ->pluck('benefits.description', 'benefits.id')
            ->toArray();

        // 🔥 preload benefit amount SEKALI (anti N+1)
        $this->benefitAmounts = DB::table('request_log_benefits')
            ->whereIn('request_log_id', $requestLogIds)
            ->get()
            ->groupBy('request_log_id');

        return $items;
    }

    public function map($item): array
    {
        $this->no++;
        $this->grandTotal += (float) $item->amount_paid;
        $benefitData = $this->getBenefitAmountsWithTotal($item->request_log_id);

        return array_merge([
            // $this->no,
            (string) $item->invoice_number,
            // (string) $item->payment_number,
            '',
            '',
            '',
            (string) $item->no_reference,
            '',
            '',
            (string) ($item->code_log ?? '-'),
            (string) ($item->payor_id ?? '-'),
            '',
            '',
            (string) ($item->organization_name ?? '-'),
            (string) ($item->member_name ?? '-'),
            (string) ($item->batch_number ?? '-'),
            (string) $benefitData['total'],
            '',
            '',
        ],
        $benefitData['amounts'],
        [
            (string) ($item->in ?? '-'),
            (string) ($item->out ?? '-'),
            '',
            (string) ($item->diagnosis ?? '-'),
            (string) ($item->type_of_member ?? '-'), // omt
            (string) ($item->service_code == 'OP' ? 'RJ' : 'RI'),
            '',
            '',
            '',
            (string) ($item->dppj ?? '-'),
            (string) ($item->in ?? '-'),
            (string) ($item->out ?? '-'),
            (string) ($item->specialities_name ?? '-'),
            'Karyawan',
            '',
            '',
            '',
            (string) ($item->keterangan ?? '-'),
            // (string) $item->invoice_date,
            // (string) $item->start_date,
            // (string) $item->end_date,
            // (float)  $item->amount_paid,
            // (string) $item->created_at,
            // (string) $item->updated_at,
        ]);
    }

    public function headings(): array
    {
        $this->initBenefits();
        return array_merge([
            // 'No',
            'No Invoice', //ok
            // 'Pembayaran Ke',
            'MONTH', //ok
            'PERIODE SES', //ok
            'SUBMIT INV/SES', //ok
            'REFERENCE', //ok
            'RECEIVED', //ok
            'INV. DATE', //ok
            'CODE', //ok
            'VENDOR', //ok
            'PO', //ok
            'SES', //ok
            'MAIN DESCRIPTION', //ok
            'DESCRIPTION', //ok
            'BN', //ok
            'AMOUNT', //ok
            'WBS', // ok
            'NOTE', // ok
        ],
        array_values($this->benefits),
        [   'DEPARTURE', // ok
            'ARRIVED', // ok
            'TEMPORARY DIAGNOSA', // ok
            'FINAL DIAGNOSA',
            'NOTE (OMT / NON OMT)',
            'RI/RJ', // OK
            'Dept', // OK
            'Cost Center', // OK
            'No.TA', // OK
            'DPJP', // OK
            'IN', // OK
            'OUT', // OK
            'SPECIALIST', // OK
            'Employee', // OK
            'Total Invoice sebelum BPJS', // OK
            'BPJS', // OK
            'Ditanggung Perusahaan', // OK
            'KETERANGAN',  // OK
            // 'Tanggal Invoice',
            // 'Start Date',
            // 'End Date',
            // 'Nominal Pembayaran',
            // 'Created At',
            // 'Updated At',
        ]);
    }

    public function title(): string
    {
        return 'VOP & VIP';
    }

    /**
     * FOOTER: Grand Total
     */
    public function registerEvents(): array
    {
        return [
            AfterSheet::class => function (AfterSheet $event) {
                // $event->sheet->getStyle('A1:AO1')
                // ->getFont()
                // ->setBold(true);

                $highestColumn = $event->sheet->getDelegate()->getHighestColumn();

                $event->sheet->getStyle('A1:' . $highestColumn . '1')
                    ->getFont()
                    ->setBold(true);


                // $row = $event->sheet->getHighestRow() + 1;

                // $event->sheet->setCellValue("A{$row}", 'Grand Total');
                // $event->sheet->setCellValue("G{$row}", $this->grandTotal);

                // // Bold footer
                // $event->sheet->getStyle("A{$row}:G{$row}")
                //     ->getFont()
                //     ->setBold(true);
            },
        ];
    }

    /**
     * FORCE: object → string
     */
    public function bindValue(Cell $cell, $value)
    {
        if (is_object($value) || is_array($value)) {
            $value = json_encode($value);
        }

        $cell->setValueExplicit($value, DataType::TYPE_STRING);
        return true;
    }

    protected function getBenefitAmountsWithTotal(?int $requestLogId): array
    {
        if (!$requestLogId || !isset($this->benefitAmounts[$requestLogId])) {
            return [
                'amounts' => array_fill(0, count($this->benefits), 0),
                'total' => 0,
            ];
        }

        $rows = $this->benefitAmounts[$requestLogId]
            ->pluck('amount_approved', 'benefit_id')
            ->toArray();

        $amounts = [];
        $total = 0;

        foreach ($this->benefits as $benefitId => $desc) {
            $amount = (float) ($rows[$benefitId] ?? 0);
            $amounts[] = $amount;
            $total += $amount;
        }

        // 🔥 kalau ini memang mau jadi grand total global
        $this->grandTotal += $total;

        return [
            'amounts' => $amounts,
            'total' => $total,
        ];
    }


    protected function initBenefits(): void
    {
        if ($this->benefitInitialized) {
            return;
        }

        // ambil request_log_id dulu
        $requestLogIds = DB::table('invoice_payments')
            ->leftJoin('invoice_payment_details', 'invoice_payment_details.invoice_payment_id', '=', 'invoice_payments.id')
            ->leftJoin('claim_requests', 'claim_requests.id', '=', 'invoice_payment_details.claim_request_id')
            ->whereNotNull('claim_requests.request_log_id')
            ->pluck('claim_requests.request_log_id')
            ->unique()
            ->values();

        if ($requestLogIds->isEmpty()) {
            $this->benefits = [];
            return;
        }

        $this->benefits = DB::table('request_log_benefits')
            ->join('benefits', 'benefits.id', '=', 'request_log_benefits.benefit_id')
            ->whereIn('request_log_benefits.request_log_id', $requestLogIds)
            ->select('benefits.id', 'benefits.description')
            ->distinct()
            ->orderBy('benefits.id')
            ->pluck('benefits.description', 'benefits.id')
            ->toArray();

        $this->benefitInitialized = true;
    }


}