<?php

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Models\Competition;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;
use Illuminate\Validation\ValidationException;

class CompetitionLogoController extends Controller
{
    public function store(Request $request, Competition $competition): JsonResponse
    {
        $request->validate([
            'file' => ['required', 'file', 'max:2048', 'mimes:png,jpg,jpeg,webp,gif,svg'],
        ]);

        $uploaded = $request->file('file');
        $ext = strtolower((string) ($uploaded->getClientOriginalExtension() ?: $uploaded->extension() ?: 'png'));
        $dir = 'competitions/'.$competition->id;
        $filename = 'logo-'.bin2hex(random_bytes(4)).'.'.$ext;

        $this->deleteStoredLogos($competition);

        try {
            $path = $uploaded->storeAs($dir, $filename, 'public');
        } catch (\Throwable $e) {
            Log::error('competition.logo.store_exception', [
                'competition_id' => $competition->id,
                'error' => $e->getMessage(),
            ]);

            throw ValidationException::withMessages([
                'file' => ['Logo 保存失败，请稍后重试'],
            ]);
        }

        if (! is_string($path) || $path === '' || $path === '0' || ! Storage::disk('public')->exists($path)) {
            throw ValidationException::withMessages([
                'file' => ['Logo 保存失败，请稍后重试'],
            ]);
        }

        $url = '/storage/'.$path.'?t='.time();
        $this->writeLogoUrl($competition, $url);

        return response()->json([
            'url' => $url,
            'logoUrl' => $url,
        ]);
    }

    public function destroy(Competition $competition): JsonResponse
    {
        $this->deleteStoredLogos($competition);
        $this->writeLogoUrl($competition, '');

        return response()->json([
            'url' => '',
            'logoUrl' => '',
        ]);
    }

    private function writeLogoUrl(Competition $competition, string $url): void
    {
        $branding = is_array($competition->branding_json) ? $competition->branding_json : [];
        $login = is_array($branding['login'] ?? null) ? $branding['login'] : [];
        if ($url === '') {
            unset($login['logoUrl']);
        } else {
            $login['logoUrl'] = $url;
        }
        if ($login === []) {
            unset($branding['login']);
        } else {
            $branding['login'] = $login;
        }
        $competition->branding_json = $branding === [] ? null : $branding;
        $competition->save();
    }

    private function deleteStoredLogos(Competition $competition): void
    {
        $dir = 'competitions/'.$competition->id;
        $disk = Storage::disk('public');
        if (! $disk->exists($dir)) {
            return;
        }
        foreach ($disk->files($dir) as $file) {
            if (str_starts_with(basename($file), 'logo')) {
                $disk->delete($file);
            }
        }
    }
}