<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\CrawlShotJob;
use App\Jobs\ProcessCrawlShotJob;
use Illuminate\Http\Request;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Response;
use Illuminate\Support\Str;
use Illuminate\Support\Facades\Storage;

class ShotController extends Controller
{
    public function shot(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'url' => 'required|url|max:2048',
            'viewport_width' => 'integer|min:320|max:3840',
            'viewport_height' => 'integer|min:240|max:2160',
            'quality' => 'integer|min:1|max:100',
            'timeout' => 'integer|min:5|max:300',
            'delay' => 'integer|min:0|max:30000',
            'block_ads' => 'boolean',
            'block_cookie_banners' => 'boolean',
            'block_trackers' => 'boolean',
            'webhook_url' => 'nullable|url|max:2048',
            'webhook_events_filter' => 'nullable|array',
            'webhook_events_filter.*' => 'in:queued,processing,completed,failed'
        ]);

        $uuid = Str::uuid()->toString();

        $job = CrawlShotJob::create([
            'uuid' => $uuid,
            'type' => 'shot',
            'url' => $validated['url'],
            'status' => 'queued',
            'webhook_url' => $validated['webhook_url'] ?? null,
            'webhook_events_filter' => isset($validated['webhook_events_filter']) ? $validated['webhook_events_filter'] : ['queued', 'processing', 'completed', 'failed'],
            'parameters' => array_filter([
                'viewport_width' => $validated['viewport_width'] ?? 1920,
                'viewport_height' => $validated['viewport_height'] ?? 1080,
                'format' => 'webp', // Force WebP for all screenshots
                'quality' => $validated['quality'] ?? 90,
                'timeout' => $validated['timeout'] ?? 30,
                'delay' => $validated['delay'] ?? 0,
                'block_ads' => $validated['block_ads'] ?? true,
                'block_cookie_banners' => $validated['block_cookie_banners'] ?? true,
                'block_trackers' => $validated['block_trackers'] ?? true
            ])
        ]);

        ProcessCrawlShotJob::dispatch($uuid);

        return response()->json([
            'uuid' => $uuid,
            'status' => 'queued',
            'message' => 'Screenshot job initiated successfully'
        ], 201);
    }

    public function status(string $uuid): JsonResponse
    {
        $job = CrawlShotJob::where('uuid', $uuid)->first();

        if (!$job) {
            return response()->json(['error' => 'Job not found'], 404);
        }

        $response = [
            'uuid' => $job->uuid,
            'status' => $job->status,
            'url' => $job->url,
            'created_at' => $job->created_at->toISOString()
        ];

        if ($job->started_at) {
            $response['started_at'] = $job->started_at->toISOString();
        }

        if ($job->completed_at) {
            $response['completed_at'] = $job->completed_at->toISOString();
        }

        if ($job->status === 'completed' && $job->file_path) {
            $imageData = Storage::get($job->file_path);

            $response['result'] = [
                'image' => [
                    'url' => url("/api/shot/{$job->uuid}.webp"),
                    'raw' => base64_encode($imageData),
                ],
                'mime_type' => 'image/webp',
                'format' => 'webp',
                'width' => $job->parameters['viewport_width'] ?? 1920,
                'height' => $job->parameters['viewport_height'] ?? 1080,
                'size' => strlen($imageData)
            ];
        }

        if ($job->status === 'failed' && $job->error_message) {
            $response['error'] = $job->error_message;
        }

        return response()->json($response);
    }

    public function serve(string $uuid): Response
    {
        $job = CrawlShotJob::where('uuid', $uuid)->where('type', 'shot')->first();

        if (!$job || $job->status !== 'completed') {
            return response('Screenshot not found or not ready', 404);
        }

        if (!$job->file_path || !Storage::exists($job->file_path)) {
            return response('Screenshot file not found', 404);
        }

        // Always serve as WebP
        return response(Storage::get($job->file_path))
            ->header('Content-Type', 'image/webp');
    }

    public function index(): JsonResponse
    {
        $jobs = CrawlShotJob::where('type', 'shot')
            ->orderBy('created_at', 'desc')
            ->paginate(20);

        $response = [
            'jobs' => $jobs->items(),
            'pagination' => [
                'current_page' => $jobs->currentPage(),
                'total_pages' => $jobs->lastPage(),
                'total_items' => $jobs->total(),
                'per_page' => $jobs->perPage()
            ]
        ];

        return response()->json($response);
    }

    private function getMimeType(string $format): string
    {
        $mimeTypes = [
            'jpg' => 'image/jpeg',
            'png' => 'image/png',
            'webp' => 'image/webp'
        ];

        return $mimeTypes[$format] ?? 'image/webp';
    }
}