<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Http;
use App\Komoditi;
use PDF;

class KomuditiController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth');
    }

    public function index(){
        $auth_user = Auth::user();
        $api_url = config('api.url');
        $user_name = $auth_user['name'];
        $komoditi = Komoditi::first();
        $min_komoditi = $komoditi['min_komoditi'];
        return view('operasi.komuditi.index',compact('user_name','api_url','min_komoditi'));
    }

    public function cetakRekodKomoditi(){
        $rekod = Http::withOptions(['verify' => config('app.api_verify')])->get(config('api.url') . '/api/komuditi/rekodkomuditi')->json();

        return view('print.laporan_komoditi',compact('rekod'));
    }

    public function rekodKomoditi(Request $request){
        $auth_user = Auth::user();
        $api_url = config('api.url');
        $user_name = $auth_user['name'];
        return view('operasi.komuditi.rekod_transaksi',compact('user_name','api_url'));
    }

    public function printRekodTransaksi(Request $request){
        $tarikh_rekod = $request->tarikh_print;
        $rekod_print = Http::withOptions(['verify' => config('app.api_verify')])->get(config('api.url') . '/api/komoditi/rekod/transaksi',[
            'tarikh' => $request->tarikh_print
        ])->json();

        return view('print.laporan_transaksi_komoditi',compact('rekod_print','tarikh_rekod'));
    }

    public function komoditiUpdate(Request $request){

        $komoditi = Komoditi::first();

        $komoditi->min_komoditi = $request->komoditi_limit;
        $komoditi->save();

        return redirect()->route('komuditi');
    }

    /**
     * Khazanah branch list of BSAS commodity orders.
     */
    public function khazanahBsas()
    {
        $auth_user = Auth::user();
        $cawangan_info = Http::withOptions(['verify' => config('app.api_verify')])
            ->get(config('api.url') . '/api/cawangan/' . $auth_user['cawangan'])
            ->json();

        return view('homepage.khazanah.bsas_komoditi', compact('cawangan_info'));
    }

    /**
     * Dummy BSAS eCert layout preview (bid, OTC, STB, then one commodity schedule).
     */
    public function previewBsasEcert()
    {
        $line = [
            ['SUPPLIER' => 'FGV TRADING SDN BHD', 'VOLUME' => '0.75276406'],
        ];

        return view('print.bsas_ecert', $this->presentBsasCertificates([
            'e_cert_no' => 'CPO21OCT26-0000031-000',
            'serial_number' => '1',
            'otc_counter_party' => 'ALI BIN ABU',
            'otc_murabaha_value' => '3,814.40',
            'product_code' => 'CPO-MSIA-09',
            'bid_ecert' => [
                'ECERTNO' => 'CPO21OCT26-0000031-000',
                'BUYER' => 'KOPERASI PERMODALAN KELANTAN BERHAD',
                'OWNER' => 'KOPERASI PERMODALAN KELANTAN BERHAD',
                'BIDNO' => '8',
                'TOTALVALUE' => '3,200.00',
                'CURRENCY' => 'MYR',
                'PRICE' => '4,251.00',
                'PRICE_MYR_EQUIVALENT' => '4,251.00',
                'PURCHASETIMEDATE' => '15:11:53.316 21 Oct 2026',
                'VALUEDATE' => '21 Oct 2026',
                'PNAME' => 'CPO-MSIA-09',
                'PVOLUME' => '0.75276406',
                'LINE' => $line,
            ],
            'otc_ecert' => [
                'ECERTNO' => 'CPO21OCT26-0000031-000',
                'SELLER' => 'KOPERASI PERMODALAN KELANTAN BERHAD',
                'BUYER' => 'ALI BIN ABU',
                'REPORTINGTIMEDATE' => '15:11:53.320 21 Oct 2026',
                'VALUEDATE' => '21 Oct 2026',
                'PNAME' => 'CPO-MSIA-09',
                'PVOLUME' => '0.75276406',
                'CURRENCY' => 'MYR',
                'PRICE' => '4,251.00',
                'PRICE_MYR_EQUIVALENT' => '4,251.00',
                'TOTALVALUE' => '3,200.00',
                'MURABAHAVALUE' => '3,814.40',
                'LINE' => $line,
            ],
            'stb_ecert' => [
                'ECERTNO' => 'CPO21OCT26-0000031-000',
                'SELLER' => 'ALI BIN ABU',
                'BUYER' => 'BURSA MALAYSIA ISLAMIC SERVICES',
                'TOTALVALUE' => '3,200.00',
                'CURRENCY' => 'MYR',
                'PRICE' => '4,251.00',
                'PRICE_MYR_EQUIVALENT' => '4,251.00',
                'SELLINGTIMEDATE' => '15:11:53.325 21 Oct 2026',
                'VALUEDATE' => '21 Oct 2026',
                'PNAME' => 'CPO-MSIA-09',
                'PVOLUME' => '0.75276406',
                'LINE' => $line,
            ],
        ], true));
    }

    /**
     * Live BSAS eCerts from stored bid, OTC and STB payloads.
     */
    public function showBsasEcert($uuid)
    {
        $response = Http::withOptions(['verify' => config('app.api_verify')])
            ->get(config('api.url') . '/api/komuditi/bsas/order/' . urlencode($uuid) . '/ecert');

        if ($response->status() === 404) {
            abort(404, $response->json('message') ?: 'eCert tidak dijumpai.');
        }

        if (!$response->successful()) {
            abort(502, 'Gagal memuatkan eCert BSAS.');
        }

        $payload = $response->json();
        if (!is_array($payload)) {
            abort(502, 'Gagal memuatkan eCert BSAS.');
        }

        $presented = $this->presentBsasCertificates($payload, false);
        if ($presented['certificates'] === []) {
            abort(404, 'eCert belum tersedia untuk order ini.');
        }

        return view('print.bsas_ecert', $presented);
    }

    /**
     * Bid, OTC and STB pages, plus one shared commodity schedule.
     */
    protected function presentBsasCertificates(array $payload, bool $isDummy): array
    {
        $certificates = [];

        $bid = $payload['bid_ecert'] ?? null;
        if (is_array($bid) && $bid !== []) {
            $certificates[] = $this->mapBidCertificate($bid, $payload);
        }

        $otc = $payload['otc_ecert'] ?? null;
        if (is_array($otc) && $otc !== []) {
            $certificates[] = $this->mapOtcCertificate($otc, $payload);
        }

        $stb = $payload['stb_ecert'] ?? null;
        if (is_array($stb) && $stb !== []) {
            $certificates[] = $this->mapStbCertificate($stb, $payload);
        }

        $scheduleSource = [];
        if (is_array($otc) && $otc !== []) {
            $scheduleSource = $otc;
        } elseif (is_array($bid) && $bid !== []) {
            $scheduleSource = $bid;
        } elseif (is_array($stb) && $stb !== []) {
            $scheduleSource = $stb;
        }

        $ecertNo = $scheduleSource['ECERTNO'] ?? ($payload['e_cert_no'] ?? '-');

        return [
            'certificates' => $certificates,
            'ecert_no' => $ecertNo,
            'lines' => $this->mapBsasLines($scheduleSource),
            'isDummy' => $isDummy,
        ];
    }

    protected function mapBidCertificate(array $ecert, array $orderMeta): array
    {
        [$time, $date] = $this->splitBsasDateTime((string) ($ecert['PURCHASETIMEDATE'] ?? ''));

        return $this->certificatePage(
            'Certificate of Purchase',
            'This is to certify that the following bid transaction has been executed<br>through the Bursa Suq Al-Sila\' in accordance with the<br>Rules of Bursa Suq Al-Sila\'.',
            $ecert,
            $orderMeta,
            array_merge([
                ['label' => 'Buyer', 'value' => $ecert['BUYER'] ?? '-'],
                ['label' => 'Owner', 'value' => $ecert['OWNER'] ?? '-'],
                ['label' => 'Bid No', 'value' => $ecert['BIDNO'] ?? ($orderMeta['serial_number'] ?? '-')],
                ['label' => 'Purchase Time / Date', 'value' => $time . ' / ' . $date],
            ], $this->commodityDetailRows($ecert, $orderMeta))
        );
    }

    protected function mapOtcCertificate(array $ecert, array $orderMeta): array
    {
        [$time, $date] = $this->splitBsasDateTime((string) ($ecert['REPORTINGTIMEDATE'] ?? ''));

        $page = $this->certificatePage(
            'Certificate of Murabahah',
            'This is to certify that the following transaction has been executed<br>through the Bursa Suq Al-Sila\' in accordance with the<br>Rules of Bursa Suq Al-Sila\'.',
            $ecert,
            $orderMeta,
            array_merge([
                ['label' => 'Seller', 'value' => $ecert['SELLER'] ?? 'KOPERASI PERMODALAN KELANTAN BERHAD'],
                ['label' => 'Buyer', 'value' => $ecert['BUYER'] ?? ($orderMeta['otc_counter_party'] ?? '-')],
                ['label' => 'Bid No', 'value' => $orderMeta['serial_number'] ?? '1'],
                ['label' => 'Reporting Time / Date', 'value' => $time . ' / ' . $date],
            ], $this->commodityDetailRows($ecert, $orderMeta), [
                ['label' => 'Transaction Type', 'value' => '-'],
            ])
        );

        $page['show_murabaha'] = true;
        $page['murabaha'] = $ecert['MURABAHAVALUE'] ?? ($orderMeta['otc_murabaha_value'] ?? '-');

        return $page;
    }

    protected function mapStbCertificate(array $ecert, array $orderMeta): array
    {
        [$time, $date] = $this->splitBsasDateTime((string) ($ecert['SELLINGTIMEDATE'] ?? ''));

        return $this->certificatePage(
            'Certificate of Sale',
            'This is to certify that the following sale transaction has been executed<br>through the Bursa Suq Al-Sila\' in accordance with the<br>Rules of Bursa Suq Al-Sila\'.',
            $ecert,
            $orderMeta,
            array_merge([
                ['label' => 'Seller', 'value' => $ecert['SELLER'] ?? ($orderMeta['otc_counter_party'] ?? '-')],
                ['label' => 'Buyer', 'value' => $ecert['BUYER'] ?? '-'],
                ['label' => 'Selling Time / Date', 'value' => $time . ' / ' . $date],
            ], $this->commodityDetailRows($ecert, $orderMeta))
        );
    }

    protected function certificatePage(string $title, string $statement, array $ecert, array $orderMeta, array $rows): array
    {
        return [
            'title' => $title,
            'statement' => $statement,
            'ecert_no' => $ecert['ECERTNO'] ?? ($orderMeta['e_cert_no'] ?? '-'),
            'currency' => $ecert['CURRENCY'] ?? 'MYR',
            'rows' => $rows,
            'show_murabaha' => false,
            'murabaha' => null,
        ];
    }

    protected function commodityDetailRows(array $ecert, array $orderMeta): array
    {
        return [
            ['label' => 'Value Date', 'value' => isset($ecert['VALUEDATE']) ? strtoupper((string) $ecert['VALUEDATE']) : '-'],
            ['label' => 'Product Code / Description', 'value' => $ecert['PNAME'] ?? ($orderMeta['product_code'] ?? '-')],
            ['label' => 'Unit', 'value' => 'Tonnage'],
            ['label' => 'Volume', 'value' => $ecert['PVOLUME'] ?? '-'],
            ['label' => 'Currency', 'value' => $ecert['CURRENCY'] ?? 'MYR'],
            ['label' => 'Price (MYR)', 'value' => $ecert['PRICE'] ?? '-'],
            ['label' => 'Price (MYR Equivalent)', 'value' => $ecert['PRICE_MYR_EQUIVALENT'] ?? ($ecert['PRICE'] ?? '-')],
            ['label' => 'Value', 'value' => $ecert['TOTALVALUE'] ?? '-'],
        ];
    }

    protected function mapBsasLines(array $ecert): array
    {
        $lines = [];
        foreach (($ecert['LINE'] ?? []) as $line) {
            if (!is_array($line)) {
                continue;
            }
            $lines[] = [
                'supplier' => $line['SUPPLIER'] ?? '-',
                'volume' => $line['VOLUME'] ?? ($ecert['PVOLUME'] ?? '-'),
            ];
        }

        if ($lines === []) {
            $lines[] = [
                'supplier' => '-',
                'volume' => $ecert['PVOLUME'] ?? '-',
            ];
        }

        return $lines;
    }

    protected function splitBsasDateTime(string $value): array
    {
        $value = trim($value);
        if ($value === '') {
            return ['-', '-'];
        }

        $parts = explode(' ', $value, 2);

        return [
            $parts[0] ?? '-',
            isset($parts[1]) ? strtoupper($parts[1]) : '-',
        ];
    }
}