class HiAnime {
    constructor() {
        this.type = "anime-streaming";
        this.version = "1.0";
        this.baseUrl = "https://hianime.to";
        console.log("[HiAnime] Constructor initialized");
    }

    getSettings() {
        console.log("[HiAnime] getSettings called");
        return {
            episodeServers: ["HD-1", "HD-2", "HD-3", "HD-4"],
            supportsDub: true
        };
    }

    async search(query) {
        console.log("[HiAnime] search called with:", JSON.stringify(query));
        
        try {
            const normalize = (str) => this.safeString(str).toLowerCase().replace(/[^a-z0-9]+/g, "");

            let searchQuery = query;
            if (typeof query === "string") {
                try {
                    searchQuery = JSON.parse(query);
                } catch (e) {
                    searchQuery = { query: query, dub: false };
                }
            }

            console.log("[HiAnime] Parsed search query:", JSON.stringify(searchQuery));

            const queryText = searchQuery.query || searchQuery.title || "";
            if (!queryText) {
                console.error("[HiAnime] No query text provided");
                return [];
            }

            const media = searchQuery.media || {};
            const startDate = media.startDate || {};
            const year = startDate.year || new Date().getFullYear();
            const month = startDate.month || 1;

            const url = `${this.baseUrl}/search?keyword=${encodeURIComponent(queryText)}&sy=${year}&sm=${month}&sort=default`;
            console.log("[HiAnime] Fetching URL:", url);

            const response = fetch(url);
            console.log("[HiAnime] Fetch response status:", response.status);
            
            const html = response.text();
            console.log("[HiAnime] HTML length:", html.length);

            const regex = /<a href="\/watch\/([^"]+)"[^>]+title="([^"]+)"[^>]+data-id="(\d+)"/g;
            const matches = [...html.matchAll(regex)];
            console.log("[HiAnime] Found", matches.length, "raw matches");

            const results = matches.map((m, idx) => {
                const id = m[3];
                const pageUrl = m[1];
                const title = m[2];

                console.log(`[HiAnime] Match ${idx + 1}: id=${id}, title="${title}"`);

                const jnameRegex = new RegExp(
                    `<h3 class="film-name">[\\s\\S]*?<a[^>]+href="\\/${pageUrl}[^"]*"[^>]+data-jname="([^"]+)"`,
                    "i"
                );
                const jnameMatch = html.match(jnameRegex);
                const jname = jnameMatch ? jnameMatch[1] : null;

                const imageRegex = new RegExp(
                    `<a href="/watch/${pageUrl.replace(/\//g, "\\/")}"[\\s\\S]*?<img[^>]+data-src="([^"]+)"`,
                    "i"
                );
                const imageMatch = html.match(imageRegex);
                const image = imageMatch ? imageMatch[1] : null;

                return {
                    id: `${id}/${searchQuery.dub ? "dub" : "sub"}`,
                    title: title,
                    image: image,
                    url: `${this.baseUrl}/${pageUrl}`,
                    subOrDub: searchQuery.dub ? "dub" : "sub"
                };
            });

            console.log("[HiAnime] Returning", results.length, "results");
            return results;

        } catch (error) {
            console.error("[HiAnime] search error:", error);
            throw error;
        }
    }

    async findEpisodes(animeId) {
        console.log("[HiAnime] findEpisodes called with:", animeId);
        
        try {
            let id, subOrDub;
            
            if (typeof animeId === "string") {
                if (animeId.includes("/")) {
                    [id, subOrDub] = animeId.split("/");
                } else {
                    try {
                        const parsed = JSON.parse(animeId);
                        id = parsed.id || parsed.animeId || animeId;
                        subOrDub = parsed.subOrDub || "sub";
                    } catch (e) {
                        id = animeId;
                        subOrDub = "sub";
                    }
                }
            } else if (typeof animeId === "object") {
                id = animeId.id || animeId.animeId;
                subOrDub = animeId.subOrDub || "sub";
            } else {
                id = String(animeId);
                subOrDub = "sub";
            }

            if (id && id.includes("/")) {
                [id, subOrDub] = id.split("/");
            }

            console.log("[HiAnime] Parsed episode params: id=", id, "subOrDub=", subOrDub);

            const url = `${this.baseUrl}/ajax/v2/episode/list/${id}`;
            console.log("[HiAnime] Fetching episodes from:", url);

            const response = fetch(url, {
                headers: { "X-Requested-With": "XMLHttpRequest" }
            });

            console.log("[HiAnime] Episodes fetch status:", response.status);

            const json = response.json();
            console.log("[HiAnime] Episodes JSON keys:", Object.keys(json).join(", "));

            const html = json.html || "";
            console.log("[HiAnime] Episodes HTML length:", html.length);

            const episodes = [];
            const regex = /<a[^>]*class="[^"]*\bep-item\b[^"]*"[^>]*data-number="(\d+)"[^>]*data-id="(\d+)"[^>]*href="([^"]+)"[\s\S]*?<div class="ep-name[^"]*"[^>]*title="([^"]+)"/g;

            let match;
            let matchCount = 0;
            while ((match = regex.exec(html)) !== null) {
                matchCount++;
                const episode = {
                    id: `${match[2]}/${subOrDub}`,
                    number: parseInt(match[1], 10),
                    url: this.baseUrl + match[3],
                    title: match[4],
                };
                console.log(`[HiAnime] Episode ${matchCount}: num=${episode.number}, id=${episode.id}, title="${episode.title}"`);
                episodes.push(episode);
            }

            console.log("[HiAnime] Total episodes found:", episodes.length);
            return episodes;

        } catch (error) {
            console.error("[HiAnime] findEpisodes error:", error);
            throw error;
        }
    }

    async findEpisodeServer(episode, _server) {
        console.log("[HiAnime] findEpisodeServer called with episode:", JSON.stringify(episode), "server:", _server);
        
        try {
            let episodeId, subOrDub;
            
            if (typeof episode === "string") {
                if (episode.includes("/")) {
                    [episodeId, subOrDub] = episode.split("/");
                } else {
                    try {
                        const parsed = JSON.parse(episode);
                        episodeId = parsed.id || parsed.episodeId || episode;
                        subOrDub = parsed.subOrDub || "sub";
                    } catch (e) {
                        episodeId = episode;
                        subOrDub = "sub";
                    }
                }
            } else if (typeof episode === "object") {
                const epId = episode.id || episode.episodeId || "";
                if (epId.includes("/")) {
                    [episodeId, subOrDub] = epId.split("/");
                } else {
                    episodeId = epId;
                    subOrDub = episode.subOrDub || "sub";
                }
            } else {
                episodeId = String(episode);
                subOrDub = "sub";
            }

            if (episodeId && episodeId.includes("/")) {
                [episodeId, subOrDub] = episodeId.split("/");
            }

            console.log("[HiAnime] Parsed server params: episodeId=", episodeId, "subOrDub=", subOrDub);

            let serverName = (_server && _server !== "default") ? _server : "HD-1";
            console.log("[HiAnime] Using server:", serverName);

            if (_server === "HD-4") {
                console.log("[HiAnime] HD-4 not supported, returning null");
                return null;
            }

            const serversUrl = `${this.baseUrl}/ajax/v2/episode/servers?episodeId=${episodeId}`;
            console.log("[HiAnime] Fetching servers from:", serversUrl);

            const serverResponse = fetch(serversUrl, {
                headers: { "X-Requested-With": "XMLHttpRequest" }
            });

            console.log("[HiAnime] Servers fetch status:", serverResponse.status);

            const serverJson = serverResponse.json();
            const serverHtml = serverJson.html || "";
            console.log("[HiAnime] Server HTML length:", serverHtml.length);

            const regex = new RegExp(
                `<div[^>]*class="item server-item"[^>]*data-type="${subOrDub}"[^>]*data-id="(\\d+)"[^>]*>\\s*<a[^>]*>\\s*${serverName}\\s*</a>`,
                "i"
            );

            const match = regex.exec(serverHtml);
            if (!match) {
                console.error(`[HiAnime] Server "${serverName}" (${subOrDub}) not found in HTML`);
                throw new Error(`Server "${serverName}" (${subOrDub}) not found`);
            }

            const serverId = match[1];
            console.log("[HiAnime] Found serverId:", serverId);

            const sourcesUrl = `${this.baseUrl}/ajax/v2/episode/sources?id=${serverId}`;
            console.log("[HiAnime] Fetching sources from:", sourcesUrl);

            const sourcesResponse = fetch(sourcesUrl, {
                headers: { "X-Requested-With": "XMLHttpRequest" }
            });

            console.log("[HiAnime] Sources fetch status:", sourcesResponse.status);

            const sourcesJson = sourcesResponse.json();
            console.log("[HiAnime] Sources JSON link:", sourcesJson.link);

            let decryptData = null;
            let requiredHeaders = {};

            try {
                console.log("[HiAnime] Attempting primary decrypter...");
                decryptData = this.extractMegaCloud(sourcesJson.link, true);
                if (decryptData && decryptData.headersProvided) {
                    requiredHeaders = decryptData.headersProvided;
                }
                console.log("[HiAnime] Primary decrypter succeeded");
            } catch (err) {
                console.warn("[HiAnime] Primary decrypter failed:", err);
            }

            if (!decryptData) {
                console.log("[HiAnime] Trying fallback API...");
                const fallbackUrl = `https://ac-api.ofchaos.com/api/anime/embed/convert/v2?embedUrl=${encodeURIComponent(sourcesJson.link)}`;
                const fallbackResponse = fetch(fallbackUrl);
                console.log("[HiAnime] Fallback fetch status:", fallbackResponse.status);
                
                decryptData = fallbackResponse.json();
                
                requiredHeaders = {
                    "Referer": "https://megacloud.club/",
                    "Origin": "https://megacloud.club",
                    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36",
                    "X-Requested-With": "XMLHttpRequest"
                };
                console.log("[HiAnime] Fallback succeeded");
            }

            const streamSource =
                (decryptData.sources || []).find((s) => s.type === "hls") ||
                (decryptData.sources || []).find((s) => s.type === "mp4");

            if (!streamSource || !streamSource.file) {
                console.error("[HiAnime] No valid stream file found in sources");
                throw new Error("No valid stream file found");
            }

            console.log("[HiAnime] Stream URL:", streamSource.file);

            const subtitles = (decryptData.tracks || [])
                .filter((t) => t.kind === "captions")
                .map((track, index) => ({
                    id: `sub-${index}`,
                    language: track.label || "Unknown",
                    url: track.file,
                    isDefault: !!track.default,
                }));

            console.log("[HiAnime] Found", subtitles.length, "subtitles");

            const result = {
                server: serverName,
                headers: requiredHeaders,
                videoSources: [{
                    url: streamSource.file,
                    type: streamSource.type === "hls" ? "m3u8" : "mp4",
                    quality: "auto",
                    subtitles: subtitles
                }]
            };

            console.log("[HiAnime] Returning server result");
            return result;

        } catch (error) {
            console.error("[HiAnime] findEpisodeServer error:", error);
            throw error;
        }
    }

    safeString(str) {
        return (typeof str === "string" ? str : "");
    }

    normalizeSeasonParts(title) {
        const s = this.safeString(title);
        return s.toLowerCase()
            .replace(/[^a-z0-9]+/g, "")
            .replace(/\d+(st|nd|rd|th)/g, (m) => m.replace(/st|nd|rd|th/, ""))
            .replace(/season|cour|part/g, "");
    }

    extractMegaCloud(embedUrl, returnHeaders) {
        console.log("[HiAnime] extractMegaCloud called with:", embedUrl);
        
        try {
            const url = new URL(embedUrl);
            const baseDomain = `${url.protocol}//${url.host}/`;

            const headers = {
                "Accept": "*/*",
                "X-Requested-With": "XMLHttpRequest",
                "Referer": baseDomain,
                "Origin": `${url.protocol}//${url.host}`,
                "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36",
            };

            const response = fetch(embedUrl, { headers: headers });
            console.log("[HiAnime] MegaCloud embed fetch status:", response.status);
            
            const html = response.text();
            console.log("[HiAnime] MegaCloud HTML length:", html.length);

            const fileIdMatch = html.match(/<title>\s*File\s+#([a-zA-Z0-9]+)\s*-/i);
            if (!fileIdMatch) {
                console.error("[HiAnime] file_id not found in embed page");
                throw new Error("file_id not found in embed page");
            }
            const fileId = fileIdMatch[1];
            console.log("[HiAnime] Found fileId:", fileId);

            let nonce = null;
            const match48 = html.match(/\b[a-zA-Z0-9]{48}\b/);
            if (match48) {
                nonce = match48[0];
                console.log("[HiAnime] Found 48-char nonce");
            } else {
                const match3x16 = [...html.matchAll(/["']([A-Za-z0-9]{16})["']/g)];
                if (match3x16.length >= 3) {
                    nonce = match3x16[0][1] + match3x16[1][1] + match3x16[2][1];
                    console.log("[HiAnime] Found 3x16-char nonce");
                }
            }
            
            if (!nonce) {
                console.error("[HiAnime] nonce not found");
                throw new Error("nonce not found");
            }

            const sourcesUrl = `${baseDomain}embed-2/v3/e-1/getSources?id=${fileId}&_k=${nonce}`;
            console.log("[HiAnime] Fetching sources from:", sourcesUrl);

            const sourcesResponse = fetch(sourcesUrl, { headers: headers });
            console.log("[HiAnime] Sources fetch status:", sourcesResponse.status);
            
            const sourcesJson = sourcesResponse.json();
            console.log("[HiAnime] Sources has", (sourcesJson.sources || []).length, "sources");

            return {
                sources: sourcesJson.sources || [],
                tracks: sourcesJson.tracks || [],
                intro: sourcesJson.intro || null,
                outro: sourcesJson.outro || null,
                server: sourcesJson.server || null,
                headersProvided: returnHeaders ? headers : undefined
            };

        } catch (error) {
            console.error("[HiAnime] extractMegaCloud error:", error);
            throw error;
        }
    }
}

module.exports = HiAnime;