const $ = (id) => document.getElementById(id);

async function fetchHealth() {
  try {
    const res = await fetch("/api/health");
    const data = await res.json();
    $("healthInfo").textContent = `모델: ${data.model} · 샘플 ${data.samples_count}개`;
  } catch {
    $("healthInfo").textContent = "API 서버에 연결할 수 없습니다.";
  }
}

async function loadSamples() {
  const select = $("sampleSelect");
  try {
    const res = await fetch("/api/voice-samples");
    const data = await res.json();
    for (const s of data.samples) {
      const opt = document.createElement("option");
      opt.value = s.path;
      opt.textContent = `${s.label}/${s.id}${s.has_transcript ? "" : " (대본 없음)"}`;
      select.appendChild(opt);
    }
  } catch (e) {
    console.warn("samples load failed", e);
  }
}

async function uploadIfNeeded() {
  const fileInput = $("fileUpload");
  if (!fileInput.files?.length) return null;

  const form = new FormData();
  form.append("file", fileInput.files[0]);
  const refText = $("refText").value.trim();
  if (refText) form.append("ref_text", refText);

  const res = await fetch("/api/voice-sample", { method: "POST", body: form });
  if (!res.ok) {
    const err = await res.json().catch(() => ({}));
    throw new Error(err.detail || "업로드 실패");
  }
  const data = await res.json();
  return data.path;
}

$("generateBtn").addEventListener("click", async () => {
  const text = $("text").value.trim();
  if (!text) {
    $("status").textContent = "텍스트를 입력하세요.";
    return;
  }

  const btn = $("generateBtn");
  btn.disabled = true;
  $("status").textContent = "음성 생성 중… (GPU 추론은 수십 초 걸릴 수 있습니다)";
  $("resultSection").hidden = true;

  try {
    let refAudio = $("sampleSelect").value || null;
    const uploaded = await uploadIfNeeded();
    if (uploaded) refAudio = uploaded;

    const body = {
      text,
      preprocess: true,
      ref_text: $("refText").value.trim() || null,
      ref_audio: refAudio,
    };

    const res = await fetch("/api/tts", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(body),
    });

    if (!res.ok) {
      const err = await res.json().catch(() => ({}));
      const detail =
        typeof err.detail === "string"
          ? err.detail
          : JSON.stringify(err.detail || err);
      throw new Error(detail || res.statusText);
    }

    const data = await res.json();
    const url = data.audio_url + "?t=" + Date.now();
    $("player").src = url;
    $("downloadLink").href = url;
    $("downloadLink").download = `${data.job_id}.wav`;
    $("resultSection").hidden = false;
    $("status").textContent = `완료 (모델: ${data.model}, job: ${data.job_id})`;
  } catch (e) {
    $("status").textContent = `오류: ${e.message}`;
  } finally {
    btn.disabled = false;
  }
});

fetchHealth();
loadSamples();