/**
 * @fileoverview URL Utilities for Rantii
 * @author retoor <retoor@molodetz.nl>
 * @description URL parsing and detection utilities
 * @keywords url, link, youtube, image, detection
 */

const URL_REGEX = /https?:\/\/[^\s<]+[^<.,:;"')\]\s]/gi;
const YOUTUBE_REGEX = /(?:youtube\.com\/(?:watch\?v=|embed\/|v\/)|youtu\.be\/)([a-zA-Z0-9_-]{11})/i;
const IMAGE_EXTENSIONS = ['.jpg', '.jpeg', '.png', '.gif', '.webp', '.svg', '.bmp'];

function extractUrls(text) {
    const matches = text.match(URL_REGEX);
    return matches || [];
}

function isYoutubeUrl(url) {
    return YOUTUBE_REGEX.test(url);
}

function getYoutubeVideoId(url) {
    const match = url.match(YOUTUBE_REGEX);
    return match ? match[1] : null;
}

function getYoutubeThumbnail(videoId) {
    return `/api/proxy-image?url=${encodeURIComponent(`https://img.youtube.com/vi/${videoId}/hqdefault.jpg`)}`;
}

function getYoutubeEmbedUrl(videoId) {
    return `https://www.youtube-nocookie.com/embed/${videoId}`;
}

function isImageUrl(url) {
    const lower = url.toLowerCase();
    return IMAGE_EXTENSIONS.some(ext => lower.includes(ext));
}

function isGifUrl(url) {
    return url.toLowerCase().includes('.gif');
}

function extractImageUrls(text) {
    return extractUrls(text).filter(isImageUrl);
}

function extractYoutubeUrls(text) {
    return extractUrls(text).filter(isYoutubeUrl);
}

function extractNonMediaUrls(text) {
    return extractUrls(text).filter(url => !isImageUrl(url) && !isYoutubeUrl(url));
}

function sanitizeUrl(url) {
    try {
        const parsed = new URL(url);
        if (parsed.protocol !== 'http:' && parsed.protocol !== 'https:') {
            return null;
        }
        return parsed.href;
    } catch {
        return null;
    }
}

function getDomain(url) {
    try {
        const parsed = new URL(url);
        return parsed.hostname;
    } catch {
        return null;
    }
}

function makeAbsoluteUrl(url, base) {
    try {
        return new URL(url, base).href;
    } catch {
        return url;
    }
}

function isDevrantImageUrl(url) {
    return url.includes('devrant.com') || url.includes('devrant.io');
}

function buildDevrantImageUrl(imagePath) {
    if (!imagePath) return null;
    if (imagePath.startsWith('http')) {
        return `/api/proxy-image?url=${encodeURIComponent(imagePath)}`;
    }
    return `/api/proxy-image?url=${encodeURIComponent(`https://img.devrant.com/${imagePath}`)}`;
}

function buildAvatarUrl(avatar) {
    if (!avatar || !avatar.i) {
        return null;
    }
    return `/api/proxy-image?url=${encodeURIComponent(`https://avatars.devrant.com/${avatar.i}`)}`;
}

export {
    extractUrls,
    isYoutubeUrl,
    getYoutubeVideoId,
    getYoutubeThumbnail,
    getYoutubeEmbedUrl,
    isImageUrl,
    isGifUrl,
    extractImageUrls,
    extractYoutubeUrls,
    extractNonMediaUrls,
    sanitizeUrl,
    getDomain,
    makeAbsoluteUrl,
    isDevrantImageUrl,
    buildDevrantImageUrl,
    buildAvatarUrl
};