<?php

namespace App\Support;

use App\Models\Business\CourierAgreementSignature;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;
use Illuminate\Validation\Rule;
use Intervention\Image\ImageManager;
use RuntimeException;

final class CourierAgreementCredentials
{
    public const IMAGES = [
        'license' => '营业执照', 'id_front' => '身份证人像面', 'id_back' => '身份证国徽面',
        'bank_front' => '银行卡正面', 'bank_back' => '银行卡背面',
    ];

    public static function definitions(string $type): array
    {
        $sheets = [
            'identity' => ['name' => '身份证推送单', 'images' => ['id_front', 'id_back']],
            'bank' => ['name' => '银行卡推送单', 'images' => ['bank_front', 'bank_back']],
        ];
        return match ($type) {
            'authorization' => $sheets,
            'entity-change' => ['license' => ['name' => '营业执照盖章推送单', 'images' => ['license']]] + $sheets,
            default => [],
        };
    }

    public static function rules(string $type, bool $requested): array
    {
        $allowed = self::definitions($type);
        $required = $requested ? array_merge(...array_column($allowed ?: [['images' => []]], 'images')) : [];
        $rules = [
            'credential_required' => ['nullable', 'boolean', Rule::prohibitedIf($allowed === [] && $requested)],
            'credential_signer' => ['nullable', 'integer', 'in:0,1'],
            'credential_images' => ['nullable', 'array:' . implode(',', array_keys(self::IMAGES))],
        ];
        foreach (self::IMAGES as $key => $label) {
            $active = in_array($key, $required, true);
            $rules['credential_images.' . $key] = [Rule::requiredIf($active), Rule::prohibitedIf(! $active),
                'nullable', 'image', 'mimes:jpg,jpeg,png', 'max:10240', 'dimensions:max_width=5000,max_height=5000'];
        }
        return $rules;
    }

    public function prepare(CourierAgreementSignature $signature, array $uploads): array
    {
        $definitions = self::definitions($signature->document_type);
        if (! ($signature->payload['credential_required'] ?? false)) {
            return [];
        }
        $disk = Storage::disk('uploads');
        $base = "courier-agreements/{$signature->company_id}/{$signature->business_no}/credentials";
        $result = [];
        foreach ($definitions as $key => $definition) {
            $pictures = [];
            $originals = [];
            foreach ($definition['images'] as $imageKey) {
                $upload = $uploads[$imageKey] ?? null;
                if (! $upload instanceof UploadedFile || ! $upload->isValid()) {
                    throw new RuntimeException('证件图片不完整，请重新上传。');
                }
                $extension = $upload->getMimeType() === 'image/png' ? 'png' : 'jpg';
                $originalPath = "{$base}/{$imageKey}.{$extension}";
                $original = file_get_contents($upload->getRealPath());
                if (! $disk->put($originalPath, $original)) {
                    throw new RuntimeException('证件原始图片无法写入私有存储。');
                }
                $image = (new ImageManager(['driver' => 'gd']))->make($upload->getRealPath())->orientate();
                $image->resize(2400, 2400, static function ($constraint): void {
                    $constraint->aspectRatio();
                    $constraint->upsize();
                });
                $maxHeight = $key === 'license' ? 470 : 180;
                $scale = min(450 / $image->width(), $maxHeight / $image->height());
                $pictures[] = ['label' => self::IMAGES[$imageKey],
                    'uri' => 'data:image/png;base64,' . base64_encode((string) $image->encode('png')),
                    'width' => round($image->width() * $scale, 2), 'height' => round($image->height() * $scale, 2)];
                $originals[$imageKey] = ['path' => $originalPath, 'sha256' => hash('sha256', $original)];
                $image->destroy();
            }
            $pdf = app('dompdf.wrapper');
            $pdf->setPaper('a4', 'portrait');
            $pdf->loadHTML(view('business.pdf.courier-credential', [
                'title' => $definition['name'], 'pictures' => $pictures,
                'stampOnly' => $key === 'license', 'signature' => $signature,
                'fontPath' => str_replace('\\', '/', resource_path('fonts/DroidSansFallback.ttf')),
            ])->render(), 'UTF-8');
            $bytes = $pdf->output();
            if (! str_starts_with($bytes, '%PDF-') || $pdf->getDomPDF()->getCanvas()->get_page_count() !== 1) {
                throw new RuntimeException('证件推送单必须为一页 PDF，请检查上传图片。');
            }
            $sourcePath = "{$base}/{$key}-source.pdf";
            if (! $disk->put($sourcePath, $bytes)) {
                throw new RuntimeException('证件推送单无法写入私有存储。');
            }
            $result[$key] = ['name' => $definition['name'], 'source_path' => $sourcePath,
                'source_sha256' => hash('sha256', $bytes), 'originals' => $originals];
        }
        return $result;
    }
}