<?php

namespace App\Http\Controllers;

use App\Models\Video;
use App\Services\VideoImporter;
use App\Services\HLS\HLSConverter;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Symfony\Component\HttpFoundation\BinaryFileResponse;

class VideoController extends Controller
{
    protected $importer;
    protected $hlsConverter;

    public function __construct(VideoImporter $importer, HLSConverter $hlsConverter)
    {
        $this->importer = $importer;
        $this->hlsConverter = $hlsConverter;
    }

    // === IMPORT VIDEO + HLS ===
    public function import(Request $request)
    {
        $this->validate($request, [
            'import_link' => 'required|url',
            'import_title' => 'nullable|string|max:150',
            'enable_hls' => 'nullable|boolean',
            'hls_quality' => 'nullable|array|min:1|max:3',
            'hls_quality.*' => 'in:1080,720,480'
        ]);

        try {
            $result = $this->importer->import(
                $request->input('import_link'),
                $request->input('import_title', ''),
                (bool) $request->input('enable_hls', false),
                $request->input('hls_quality', ['720'])
            );

            return response()->json([
                'status' => 'success',
                'data' => $result
            ]);
        } catch (\Exception $e) {
            return response()->json([
                'status' => 'error',
                'message' => $e->getMessage()
            ], 500);
        }
    }

    // === STREAM HLS (master.m3u8, playlist.m3u8, .ts, .chunk) ===
    public function streamHls($folder, $file = 'master.m3u8')
    {
        $path = public_path("hls/{$folder}/{$file}");

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

        $ext = pathinfo($path, PATHINFO_EXTENSION);

        // Xử lý .m3u8 → rewrite URL .ts
        if ($ext === 'm3u8') {
            $content = file_get_contents($path);
            $baseUrl = url("/api/hls/{$folder}");

            // Thay thế các segment .ts, .chunk hoặc .m4s thành full URL
            $content = preg_replace(
                '/(^\s*)(?!#)([\w\-\.%]+\.(ts|chunk|m4s))/m',
                "$1{$baseUrl}/$2",
                $content
            );

            return response($content, 200, [
                'Content-Type' => 'application/vnd.apple.mpegurl',
                'Access-Control-Allow-Origin' => '*',
                'Access-Control-Allow-Methods' => 'GET, OPTIONS',
                'Access-Control-Allow-Headers' => 'Range',
                'Cache-Control' => 'no-cache',
            ]);
        }

        // Xử lý .ts, .chunk, .m4s
        $mime = in_array($ext, ['ts', 'chunk']) ? 'video/mp2t' : 'video/mp4';

        $response = new BinaryFileResponse($path);
        $response->headers->set('Content-Type', $mime);
        $response->headers->set('Access-Control-Allow-Origin', '*');
        $response->headers->set('Accept-Ranges', 'bytes');
        $response->headers->set('Cache-Control', 'no-cache');

        return $response;
    }

    // === DANH SÁCH VIDEO ===
    public function index(Request $request)
    {
        $perPage = $request->input('per_page', 15);
        $videos = Video::orderBy('created_at', 'desc')->paginate($perPage);

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

    public function show($id)
    {
        $video = Video::findOrFail($id);
        return response()->json($video);
    }

    // === XÓA VIDEO + HLS FILES ===
    public function destroy($id)
    {
        $video = Video::findOrFail($id);

        // Xóa file gốc
        if ($video->path && file_exists($video->path)) {
            @unlink($video->path);
        }

        // Xóa thumbnail
        if ($video->thumbnail && file_exists(storage_path('app/' . $video->thumbnail))) {
            @unlink(storage_path('app/' . $video->thumbnail));
        }

        // Xóa HLS files
        if ($video->hls_enabled && $video->hls_master_playlist) {
            $this->hlsConverter->deleteHLSFiles($video->hls_master_playlist);
        }

        $video->delete();

        return response()->json([
            'status' => 'success',
            'message' => 'Đã xóa video thành công'
        ]);
    }
}