<?php

namespace App\Support;

use App\Models\Business\CourierAgreementSignature;
use Illuminate\Support\Carbon;
use RuntimeException;

final class CourierAgreementPdf
{
    public function render(CourierAgreementSignature $signature): string
    {
        $payload = $signature->payload ?? [];
        $signatureDate = (string) ($payload['signature_date'] ?? $payload['entity_proof_date'] ?? $payload['shared_proof_date'] ?? '');
        try {
            $signatureDate = $signatureDate !== '' ? Carbon::parse($signatureDate)->format('Y年n月j日') : '待填写';
        } catch (\Throwable) {
            $signatureDate = '待填写';
        }
        $html = view('business.pdf.courier-agreement', [
            'signature' => $signature,
            'type' => $signature->document_type,
            'title' => $this->title($signature),
            'payload' => $payload,
            'signatureDate' => $signatureDate,
            'fontPath' => str_replace('\\', '/', resource_path('fonts/DroidSansFallback.ttf')),
        ])->render();

        $pdf = app('dompdf.wrapper');
        $pdf->setPaper('a4', 'portrait');
        $pdf->loadHTML($html, 'UTF-8');
        $bytes = $pdf->output();

        if (! is_string($bytes) || ! str_starts_with($bytes, '%PDF-')) {
            throw new RuntimeException('协议 PDF 生成失败。');
        }

        return $bytes;
    }

    private function title(CourierAgreementSignature $signature): string
    {
        return match ($signature->document_type) {
            'account-proof' => '收款帐户资料证明',
            'account-change' => '收款帐户资料变更证明',
            'entity-change' => '公司主体变更证明',
            'shared-contract' => '证明',
            'cooperation-contract' => '服务协议',
            default => '授权委托书',
        };
    }
}