import type { VideoProvider, VideoMetadata, EmbedOptions } from './types';
import { getCachedMetadata, setCachedMetadata } from './metadata-cache';
import { resolveServerBunnyCdnHostname } from '@/lib/bunny-cdn';

// Bunny Stream URL patterns
// e.g. https://iframe.mediadelivery.net/play/libraryId/videoId
// e.g. https://video.bunnycdn.com/play/libraryId/videoId
const BUNNY_PATTERNS = [
    /(?:iframe\.mediadelivery\.net|video\.bunnycdn\.com)\/(?:play|embed)\/[0-9]+\/([a-zA-Z0-9_-]+)/,
];

export const bunnyProvider: VideoProvider = {
    id: 'bunny',
    name: 'Bunny Stream',
    icon: 'Video',

    canHandle(url: string): boolean {
        return BUNNY_PATTERNS.some(pattern => pattern.test(url));
    },

    extractVideoId(url: string): string | null {
        for (const pattern of BUNNY_PATTERNS) {
            const match = url.match(pattern);
            if (match && match[1]) {
                return match[1];
            }
        }
        return null;
    },

    getEmbedUrl(videoId: string, options: EmbedOptions = {}): string {
        // Requires library ID, but our current DB only stores `videoId` for standard providers
        // For Bunny, we typically store the full embed URL as `originalUrl`
        // So if this function is called, we try to extract it from the environment or default
        const libraryId = process.env.NEXT_PUBLIC_BUNNY_STREAM_LIBRARY_ID || process.env.BUNNY_STREAM_LIBRARY_ID || '0';

        const params = new URLSearchParams();

        if (options.autoplay) params.set('autoplay', 'true');
        if (options.loop) params.set('loop', 'true');
        if (options.muted) params.set('muted', 'true');

        // We can use video.bunnycdn.com or iframe.mediadelivery.net
        return `https://iframe.mediadelivery.net/embed/${libraryId}/${videoId}?${params.toString()}`;
    },

    getThumbnailUrl(videoId: string): string {
        const bunnyCdnHostname = resolveServerBunnyCdnHostname();
        if (!bunnyCdnHostname) return '';
        return `https://${bunnyCdnHostname}/${videoId}/thumbnail.jpg`;
    },

    async getMetadata(videoId: string): Promise<VideoMetadata> {
        const cacheKey = `bunny:${videoId}`;
        const cached = getCachedMetadata(cacheKey);
        if (cached) return cached;

        // We can't fetch title/duration via public API without an API key,
        // so we return basic metadata. When videos are uploaded via our server,
        // the title will be passed during creation.
        const fallback: VideoMetadata = {
            title: 'Bunny Video',
            thumbnailUrl: this.getThumbnailUrl(videoId, 'large'),
        };

        setCachedMetadata(cacheKey, fallback);
        return fallback;
    },
};