(async function () {
    "use strict";
    // Qwen3-TTS (vllm-omni auf der DGX) statt Azure. Gleicher Ablauf wie
    // SpeechSynthesis_SSML.js, fragt aber nacheinander ab:
    //   1. Stimme   -> Klonstimmen aus voice_clone/ oder feste Qwen-Stimmen
    //   2. Text     -> <break time="500ms"/> bzw. <break time="1s"/> fuer Pausen
    //                  (Qwen3-TTS kann kein SSML, andere Tags werden entfernt)
    //   3. Datei    -> Endung bestimmt das Format (Enter = tts_asterisk.wav):
    //                    .wav  WAV 8 kHz mono (Asterisk)
    //                    .g722 G.722 16 kHz roh (Asterisk)
    //                    .mp3  MP3 (WhatsApp, E-Mail)
    //
    // Aufruf (Musik wie bisher):
    //   node SpeechSynthesis_Qwen.js                  -> background.wav, falls vorhanden
    //   node SpeechSynthesis_Qwen.js meine-musik.mp3  -> diese Musik
    //   node SpeechSynthesis_Qwen.js --no-music       -> ohne Musik (auch: none, -n)
    //
    // Neue Klonstimme: Aufnahme (max. 30 s) als voice_clone/<name>.wav ablegen,
    // exaktes Transkript als voice_clone/<name>.txt daneben -> erscheint in der Liste.
    //
    // Ohne Rueckfragen (z. B. in Skripten, Text dann per stdin):
    //   QWEN_TTS_VOICE=<name oder nummer>  QWEN_TTS_OUT=<datei>
    //   QWEN_TTS_REF_AUDIO=<aufnahme> [QWEN_TTS_REF_TEXT=<transkript.txt>]  (Klon ausserhalb voice_clone/)
    //   QWEN_TTS_INSTRUCT=<Stilanweisung, nur feste Stimmen>  QWEN_TTS_URL=<api>
    const readline = require("readline");
    const { execFile } = require("child_process");
    const fs = require("fs");
    const path = require("path");

    const host = "http://10.146.97.103";
    const sampleRate = 24000;
    const rawFile = "tts_raw.wav";

    const arg = process.argv[2];
    const noMusic = ["--no-music", "none", "-n"].includes(arg);
    const musicFile = noMusic ? null : (arg || "background.wav");
    const musicVolume = 0.15;
    const introMs = 2000; // Musik-Vorlauf vor der Sprache

    // Klonstimmen: Audiodatei mit gleichnamiger .txt in voice_clone/ ("alex_ref.wav" -> "alex")
    const cloneDir = path.join(__dirname, "voice_clone");
    const txtFor = (f) => f.replace(/\.[^./]+$/, "") + ".txt";
    const clones = (fs.existsSync(cloneDir) ? fs.readdirSync(cloneDir) : [])
        .filter((f) => /\.(wav|mp3|m4a|ogg|flac)$/i.test(f) && fs.existsSync(path.join(cloneDir, txtFor(f))))
        .map((f) => ({ name: f.replace(/(_ref)?\.[^.]+$/, ""), file: path.join(cloneDir, f) }));
    // Feste Stimmen des CustomVoice-Modells (per QWEN_TTS_VOICE auch: ono_anna, sohee, eric, dylan)
    const builtins = ["serena", "vivian", "ryan", "aiden", "uncle_fu"];
    const voices = [...clones, ...builtins.map((name) => ({ name }))];

    function outArgs(file) {
        if (/\.g722$/i.test(file)) return ["-ac", "1", "-ar", "16000", "-c:a", "g722", "-f", "g722", file];
        if (/\.mp3$/i.test(file)) return ["-ac", "1", "-ar", "44100", "-c:a", "libmp3lame", "-b:a", "96k", file];
        return ["-acodec", "pcm_s16le", "-ar", "8000", "-ac", "1", file];
    }

    function ffmpeg(args) {
        return new Promise((resolve, reject) => {
            execFile("ffmpeg", ["-y", "-loglevel", "error", ...args], (error, stdout, stderr) => {
                if (error) reject(new Error(stderr || error.message));
                else resolve();
            });
        });
    }

    // "Hallo <break time="1s"/> Welt" -> [{text:"Hallo"}, {pauseMs:1000}, {text:"Welt"}]
    function parseInput(input) {
        const parts = [];
        const re = /<break\s+time\s*=\s*["']?([\d.]+)\s*(ms|s)["']?\s*\/?>/gi;
        let last = 0, m;
        const pushText = (t) => {
            t = t.replace(/<[^>]+>/g, " ").replace(/\s+/g, " ").trim();
            if (t) parts.push({ text: t });
        };
        while ((m = re.exec(input)) !== null) {
            pushText(input.slice(last, m.index));
            parts.push({ pauseMs: Math.round(parseFloat(m[1]) * (m[2].toLowerCase() === "s" ? 1000 : 1)) });
            last = re.lastIndex;
        }
        pushText(input.slice(last));
        return parts;
    }

    // Aufnahme (beliebiges Format) -> 24 kHz mono WAV als data-URL fuer ref_audio
    async function loadRefAudio(file) {
        const refWav = "tts_ref.wav";
        await ffmpeg(["-i", file, "-ac", "1", "-ar", String(sampleRate), refWav]);
        const dataUrl = "data:audio/wav;base64," + fs.readFileSync(refWav).toString("base64");
        fs.unlinkSync(refWav);
        return dataUrl;
    }

    // Zeilenweise lesen statt rl.question: funktioniert auch mit per Pipe uebergebenem Text
    const rl = readline.createInterface({ input: process.stdin, output: process.stdout });
    const lines = rl[Symbol.asyncIterator]();
    async function ask(question) {
        process.stdout.write(question);
        const { value, done } = await lines.next();
        return done ? "" : value.trim();
    }

    // 1. Stimme
    let voice;
    if (process.env.QWEN_TTS_REF_AUDIO) {
        voice = { name: path.basename(process.env.QWEN_TTS_REF_AUDIO), file: process.env.QWEN_TTS_REF_AUDIO };
    } else {
        let choice = process.env.QWEN_TTS_VOICE;
        if (!choice) {
            console.log("Stimmen:");
            voices.forEach((v, i) => console.log(`  ${i + 1}) ${v.name}${v.file ? "" : "  (feste Qwen-Stimme)"}`));
            choice = (await ask("Stimme [1]: ")) || "1";
        }
        const n = Number(choice);
        voice = Number.isInteger(n) ? voices[n - 1]
            : voices.find((v) => v.name === choice.toLowerCase()) || { name: choice.toLowerCase() };
        if (!voice) {
            console.error(`Ungueltige Auswahl: ${choice}`);
            rl.close();
            return;
        }
    }
    const refTextFile = voice.file && (process.env.QWEN_TTS_REF_TEXT ||
        [txtFor(voice.file), path.join(path.dirname(voice.file), "referenztext.txt")].find((f) => fs.existsSync(f)));
    const apiUrl = process.env.QWEN_TTS_URL || `${host}:${voice.file ? 8012 : 8011}/v1/audio/speech`;
    const instructions = process.env.QWEN_TTS_INSTRUCT || "";

    // 2. Text, 3. Datei
    const userInput = await ask("Text (<break time=\"500ms\"/> fuer Pausen):\n> ");
    const parts = parseInput(userInput);
    if (!parts.some((p) => p.text)) {
        console.error("Kein Text eingegeben.");
        rl.close();
        return;
    }
    const outFile = process.env.QWEN_TTS_OUT ||
        (await ask("Datei [tts_asterisk.wav] (.wav / .g722 / .mp3): ")) || "tts_asterisk.wav";
    rl.close();

    let clone = null; // { audio, text } im Klon-Modus

    async function synthesize(text, file) {
        const body = { input: text, language: "German", response_format: "wav", sample_rate: sampleRate };
        if (clone) {
            // Base-Modell kennt keine instructions
            Object.assign(body, { task_type: "Base", ref_audio: clone.audio, ref_text: clone.text });
        } else {
            body.voice = voice.name;
            if (instructions) body.instructions = instructions;
        }
        const res = await fetch(apiUrl, {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify(body)
        });
        if (!res.ok) throw new Error(`HTTP ${res.status}: ${await res.text()}`);
        fs.writeFileSync(file, Buffer.from(await res.arrayBuffer()));
    }

    const started = Date.now();
    console.log(`Synthesizing (Qwen3-TTS, ${voice.file ? `Klon: ${voice.name}` : `Stimme: ${voice.name}`})...`);
    const segFiles = [];
    const ffArgs = [];
    const labels = [];
    try {
        if (voice.file) {
            if (!refTextFile) throw new Error(`Kein Transkript zu ${voice.file} gefunden (.txt daneben oder QWEN_TTS_REF_TEXT)`);
            clone = {
                audio: await loadRefAudio(voice.file),
                text: fs.readFileSync(refTextFile, "utf8").trim()
            };
        }
        for (const p of parts) {
            if (p.text) {
                const f = `tts_seg_${segFiles.length}.wav`;
                await synthesize(p.text, f);
                segFiles.push(f);
                ffArgs.push("-i", f);
            } else {
                ffArgs.push("-f", "lavfi", "-t", String(p.pauseMs / 1000),
                    "-i", `anullsrc=r=${sampleRate}:cl=mono`);
            }
            labels.push(`[${labels.length}:a]`);
        }
        await ffmpeg([...ffArgs, "-filter_complex",
            `${labels.join("")}concat=n=${labels.length}:v=0:a=1`, rawFile]);
    } catch (err) {
        console.error("TTS failed:", err.message);
        return;
    } finally {
        segFiles.forEach((f) => fs.existsSync(f) && fs.unlinkSync(f));
    }

    const hasMusic = !noMusic && fs.existsSync(musicFile);
    if (!noMusic && !hasMusic) {
        console.warn(`Hinweis: "${musicFile}" nicht gefunden -> ohne Musik.`);
    }
    console.log(
        "Qwen3-TTS done → converting" +
        (hasMusic ? ` (mit Musik: ${musicFile})...` : " (ohne Musik)...")
    );

    try {
        if (hasMusic) {
            await ffmpeg(["-i", rawFile, "-stream_loop", "-1", "-i", musicFile, "-filter_complex",
                `[0:a]adelay=${introMs}:all=1[sp];` +
                `[1:a]volume=${musicVolume}[bg];` +
                `[sp][bg]amix=inputs=2:duration=first:dropout_transition=0,` +
                `areverse,afade=t=in:d=2,areverse`,
                ...outArgs(outFile)]);
        } else {
            await ffmpeg(["-i", rawFile, ...outArgs(outFile)]);
        }
    } catch (err) {
        console.error("FFmpeg error:", err.message);
        return;
    }
    console.log(`Fertig: ${outFile} (${((Date.now() - started) / 1000).toFixed(1)} s)`);
    fs.unlinkSync(rawFile);
})();