<?php

namespace App\Services;

use App\Http\Controllers\GadaianController;
use App\Http\Controllers\AliranTunaiController;
use App\Events\Dashboard\GadaiNotify;
use Illuminate\Http\Request;
use Illuminate\Pagination\LengthAwarePaginator;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Http;
use Throwable;

class ShorakaFinancingService
{
    public function ensureReady(): void
    {
        $response = $this->api()->get(rtrim(config('api.url'), '/') . '/api/shoraka/readiness')->throw()->json();
        abort_unless(!empty($response['ready']), 503, 'Shoraka belum dikonfigurasi. Pembiayaan baharu ditahan.');
    }

    public function api()
    {
        return Http::withOptions(['verify' => config('app.api_verify')])
            ->acceptJson()->timeout(75);
    }

    public function url(string $reference, string $suffix = ''): string
    {
        return rtrim(config('api.url'), '/') . '/api/shoraka/gadai/'
            . rawurlencode(Auth::user()->cawangan) . '/' . rawurlencode($reference) . $suffix;
    }

    public function hasOrder(string $reference): bool
    {
        $snapshot = $this->snapshot($reference);
        return !empty($snapshot['order']);
    }

    public function snapshot(string $reference): array
    {
        $response = $this->api()->get($this->url($reference));
        if ($response->status() === 404) {
            return [];
        }
        if ($response->serverError()) {
            abort(503, 'Shoraka belum dikonfigurasi. Pembiayaan baharu ditahan.');
        }
        $response->throw();
        return $response->json()['data'] ?? [];
    }

    public function listForBranch(string $branch)
    {
        $response = $this->api()->get(rtrim(config('api.url'), '/') . '/api/shoraka/transactions', [
            'kodcaw' => $branch,
            'per_page' => 100,
        ])->throw()->json();
        return collect($response['data'] ?? []);
    }

    public function search(array $filters, ?string $onlyBranch): array
    {
        $query = [
            'per_page' => 25,
            'page' => max(1, (int) request()->input('page', 1)),
            'with_branches' => 1,
        ];
        if ($onlyBranch) {
            $query['kodcaw'] = $onlyBranch;
            $query['branch_scope'] = $onlyBranch;
        } elseif (!empty($filters['kodcaw'])) {
            $query['kodcaw'] = $filters['kodcaw'];
        }
        foreach (['norujukan', 'status', 'date_from', 'date_to'] as $field) {
            if (!empty($filters[$field])) {
                $query[$field] = $filters[$field];
            }
        }
        $response = $this->api()->get(rtrim(config('api.url'), '/') . '/api/shoraka/transactions', $query)->throw()->json();
        $items = collect($response['data'] ?? []);
        $records = new LengthAwarePaginator(
            $items,
            (int) ($response['total'] ?? 0),
            (int) ($response['per_page'] ?? 25),
            (int) ($response['current_page'] ?? 1),
            ['path' => request()->url(), 'query' => request()->query()]
        );
        return [$records, collect($response['branches'] ?? [])];
    }

    public function hold(Request $request, string $reference, string $action, array $extra = [])
    {
        if ($this->hasOrder($reference)) {
            return $this->failed($request, 'Order Shoraka telah dihantar. Jangan hantar semula.');
        }

        $context = array_merge($request->except(['_token', 'password']), $extra, ['action' => $action]);
        try {
            $response = $this->api()->post($this->url($reference, '/submit'), [
                'teller' => Auth::user()->name,
            ]);
        } catch (Throwable $exception) {
            if ($this->hasOrder($reference)) {
                return $this->failed($request, 'Order Shoraka telah dihantar. Jangan hantar semula.');
            }
            return $this->failed($request, 'Order Shoraka tidak berjaya dihantar. Gadaian tidak dihantar.');
        }

        if (!$response->successful()) {
            $message = $response->json()['message'] ?? ($this->hasOrder($reference)
                ? 'Order Shoraka telah dihantar. Jangan hantar semula.'
                : 'Order Shoraka tidak berjaya dihantar. Gadaian tidak dihantar.');
            return $this->failed($request, $message);
        }

        $snapshot = $this->waitUntilCompleted($reference);
        $status = $snapshot['order']['status'] ?? null;
        if ($status !== 'Completed') {
            return $this->failed($request, 'Pengesahan Shoraka belum Completed. Jangan hantar semula.');
        }
        if (empty($snapshot['can_complete'])
            || (array_key_exists('pinjaman', $context)
                && number_format((float) $context['pinjaman'], 2, '.', '')
                    !== number_format((float) ($snapshot['order_amount'] ?? 0), 2, '.', ''))) {
            return $this->failed($request, 'Amaun pembiayaan berubah. Bayaran tidak diproses.');
        }

        return $this->complete($request, $reference, $context);
    }

    private function waitUntilCompleted(string $reference): array
    {
        set_time_limit(150);
        $deadline = microtime(true) + 120;
        $snapshot = [];
        do {
            try {
                $this->api()->post($this->url($reference, '/refresh'))->throw();
                $snapshot = $this->snapshot($reference);
            } catch (Throwable $exception) {
                $snapshot = [];
            }
            $status = $snapshot['order']['status'] ?? null;
            if ($status === 'Completed' || in_array($status, ['Cancelled', 'FAILED', 'UNKNOWN'], true)) {
                return $snapshot;
            }
            if (microtime(true) >= $deadline) {
                return $snapshot;
            }
            sleep(2);
        } while (true);
    }

    private function complete(Request $request, string $reference, array $context)
    {
        $branch = Auth::user()->cawangan;
        $saved = new Request($context);
        $saved->setLaravelSession($request->session());
        if (($context['action'] ?? null) === 'gadai') {
            return app(GadaianController::class)->completeShorakaFinancing($saved);
        }
        if (!empty($context['update_history'])) {
            $this->api()->put(rtrim(config('api.url'), '/') . '/api/gadai/updatehistory/'
                . rawurlencode($branch) . '/' . rawurlencode($reference), [
                    'historygadaian' => $saved->norujukan,
                    'jenistebus' => $saved->jenistebus,
                ])->throw();
        }
        $cash = app(AliranTunaiController::class);
        if (($context['action'] ?? null) === 'autotawarruq') {
            $cash->alirantunaiTebusAutoTawarruq($saved);
        } else {
            $cash->alirantunaiTebus($saved);
        }
        event(new \App\Events\Dashboard\TebusNotify('lulus', $branch));
        event(new GadaiNotify('lulus', $branch));
        return redirect()->route('customer_info');
    }

    public function printData(string $reference): ?array
    {
        $response = $this->api()->get($this->url($reference))->throw()->json()['data'];
        $order = $response['order'] ?? null;
        if (!$order) {
            return null;
        }
        abort_unless(!empty($response['can_complete']), 409, 'SAG ditahan: Shoraka belum Completed.');
        $details = $response['details'] ?? [];
        $certificateDetails = $details['certificateDetails1'] ?? '';
        if (is_array($certificateDetails)) {
            $certificateDetails = $certificateDetails[0] ?? '';
        }
        $certificate = is_string($certificateDetails) ? trim(explode('|', $certificateDetails)[0]) : '';
        abort_unless($certificate !== '' && isset($details['unit'], $details['volume'], $details['commodityType']),
            409, 'Maklumat sijil belum lengkap. Semak status Shoraka dahulu.');
        return [
            'komoditi' => ['no_sijil' => $certificate],
            'product' => [
                'kodproduk' => $details['commodityType'],
                'description' => $details['commodityType'] === '000-COPPER' ? 'Copper' : 'Plastic resin',
                'unit' => $details['unit'],
            ],
            'kuantiti' => $details['volume'],
        ];
    }

    private function failed(Request $request, string $message)
    {
        if ($request->ajax() || $request->expectsJson()) {
            abort(502, $message);
        }
        return redirect()->back()->with('error', $message);
    }
}