// Twitch-/YouTube-Benachrichtigungen: pollt alle 5 min und postet in den
// Social-Kanal. YouTube läuft ohne Key (RSS), Twitch braucht App-Credentials
// (dev.twitch.tv → App registrieren → Client-ID + Secret im System-Tab).
import { EmbedBuilder } from 'discord.js';
import { getSetting, setSetting } from '../db.js';
import {
    socialAnnounceChannelId, youtubeChannelId,
    twitchChannel, twitchClientId, twitchClientSecret,
    brandColor, brandColor2, brandFooter,
} from '../runtime-settings.js';
import { moduleEnabled } from '../modules.js';
import { everyTuned } from '../tuning.js';

let twitchToken = null; // { token, expiresAt }

async function announce(client, embed) {
    const channelId = socialAnnounceChannelId();
    if (!channelId) return;
    const channel = await client.channels.fetch(channelId).catch(() => null);
    if (channel?.isTextBased()) await channel.send({ embeds: [embed] }).catch(() => {});
}

/* ── YouTube (RSS, ohne API-Key) ───────────────────── */

async function checkYouTube(client) {
    if (!moduleEnabled('social')) return;
    const channelId = youtubeChannelId();
    if (!channelId) return;
    const res = await fetch(`https://www.youtube.com/feeds/videos.xml?channel_id=${channelId}`, {
        signal: AbortSignal.timeout(10_000),
    });
    if (!res.ok) return;
    const xml = await res.text();
    const videoId = xml.match(/<yt:videoId>([^<]+)<\/yt:videoId>/)?.[1];
    const title = xml.match(/<entry>[\s\S]*?<title>([^<]+)<\/title>/)?.[1];
    if (!videoId) return;

    const last = getSetting('yt_last_video');
    if (last === videoId) return;
    setSetting('yt_last_video', videoId);
    if (last === null) return; // Erststart: nur merken, nicht alte Videos posten

    await announce(client, new EmbedBuilder()
        .setColor(brandColor2())
        .setTitle(`▶️ Neues Video: ${title ?? 'YouTube'}`)
        .setURL(`https://www.youtube.com/watch?v=${videoId}`)
        .setImage(`https://i.ytimg.com/vi/${videoId}/maxresdefault.jpg`)
        .setFooter({ text: brandFooter('YOUTUBE') }));
    console.log(`[social] Neues YouTube-Video angekündigt (${videoId})`);
}

/* ── Twitch (Helix, Client-Credentials) ────────────── */

async function getTwitchToken() {
    if (twitchToken && Date.now() < twitchToken.expiresAt) return twitchToken.token;
    const res = await fetch('https://id.twitch.tv/oauth2/token', {
        method: 'POST',
        headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
        body: new URLSearchParams({
            client_id: twitchClientId(),
            client_secret: twitchClientSecret(),
            grant_type: 'client_credentials',
        }),
    });
    if (!res.ok) throw new Error(`Twitch-Token ${res.status}`);
    const data = await res.json();
    twitchToken = { token: data.access_token, expiresAt: Date.now() + (data.expires_in - 60) * 1000 };
    return twitchToken.token;
}

async function checkTwitch(client) {
    if (!moduleEnabled('social')) return;
    const login = twitchChannel();
    if (!login || !twitchClientId() || !twitchClientSecret()) return;

    const token = await getTwitchToken();
    const res = await fetch(`https://api.twitch.tv/helix/streams?user_login=${encodeURIComponent(login)}`, {
        headers: { 'Client-ID': twitchClientId(), Authorization: `Bearer ${token}` },
        signal: AbortSignal.timeout(10_000),
    });
    if (!res.ok) return;
    const stream = (await res.json()).data?.[0] ?? null;

    const wasLive = getSetting('twitch_live') === '1';
    if (stream && !wasLive) {
        setSetting('twitch_live', '1');
        await announce(client, new EmbedBuilder()
            .setColor(0x9146ff)
            .setTitle(`🔴 ${login} ist LIVE: ${stream.title ?? ''}`.slice(0, 250))
            .setURL(`https://twitch.tv/${login}`)
            .setDescription(stream.game_name ? `Spielt **${stream.game_name}**` : null)
            .setImage(stream.thumbnail_url?.replace('{width}', '1280').replace('{height}', '720') ?? null)
            .setFooter({ text: brandFooter('TWITCH') }));
        console.log('[social] Twitch-Live angekündigt');
    } else if (!stream && wasLive) {
        setSetting('twitch_live', '0');
    }
}

export function startSocialNotify(client) {
    const tick = async () => {
        try { await checkYouTube(client); } catch (e) { console.error('[social] YouTube:', e.message); }
        try { await checkTwitch(client); } catch (e) { console.error('[social] Twitch:', e.message); }
    };
    everyTuned('social_interval', 'minutes', tick, 'social');
}