const state = {
  jobId: null,
  draft: null,
};

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

function pretty(obj) {
  return JSON.stringify(obj, null, 2);
}

async function refreshHealth() {
  const el = $("health");
  try {
    const res = await fetch("/api/health");
    const data = await res.json();
    const z = data.zhipu_configured ? `智谱 OK (${data.zhipu_model})` : "智谱未配置";
    const g = data.geometry?.available ? "几何后端可用" : "几何后端未装(占位 mesh)";
    el.textContent = `${z} · ${g}`;
    el.className = "pill " + (data.zhipu_configured ? "ok" : "warn");
  } catch (e) {
    el.textContent = "后端未连接";
    el.className = "pill warn";
  }
}

$("btnParse").addEventListener("click", async () => {
  const file = $("file").files?.[0];
  if (!file) {
    $("parseOut").textContent = "请先选择 STEP 文件";
    $("parseOut").classList.add("error");
    return;
  }
  $("parseOut").classList.remove("error");
  $("parseOut").textContent = "解析中…";
  const fd = new FormData();
  fd.append("file", file);
  try {
    const res = await fetch("/api/parse", { method: "POST", body: fd });
    if (!res.ok) throw new Error(await res.text());
    const data = await res.json();
    state.jobId = data.job_id;
    $("btnPropose").disabled = false;
    $("parseOut").textContent = pretty({
      job_id: data.job_id,
      root_name: data.root_name,
      product_count: data.product_names?.length,
      product_names: data.product_names,
      stats: data.stats,
    });
  } catch (e) {
    $("parseOut").textContent = String(e);
    $("parseOut").classList.add("error");
  }
});

$("btnPropose").addEventListener("click", async () => {
  if (!state.jobId) return;
  $("proposeOut").classList.remove("error");
  $("proposeOut").textContent = "调用智谱中（可能需要几十秒）…";
  try {
    const res = await fetch("/api/propose", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        job_id: state.jobId,
        profile: $("profile").value,
        robot_name: $("robotName").value || "A7",
        extra_hint: $("hint").value || "",
      }),
    });
    if (!res.ok) throw new Error(await res.text());
    const draft = await res.json();
    state.draft = draft;
    $("draftEditor").value = pretty(draft);
    $("btnExport").disabled = false;
    $("proposeOut").textContent = `links=${draft.links?.length || 0}, joints=${draft.joints?.length || 0}\n` +
      (draft.notes || []).map((n) => `- ${n}`).join("\n");
  } catch (e) {
    $("proposeOut").textContent = String(e);
    $("proposeOut").classList.add("error");
  }
});

$("btnExport").addEventListener("click", async () => {
  if (!state.jobId) return;
  $("exportOut").classList.remove("error");
  try {
    const draft = JSON.parse($("draftEditor").value);
    state.draft = draft;
    const res = await fetch("/api/export", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        job_id: state.jobId,
        draft,
        include_meshes: true,
      }),
    });
    if (!res.ok) throw new Error(await res.text());
    const meta = await res.json();
    $("exportOut").textContent = pretty(meta);
    const name = draft.name || "robot";
    const a = $("dlLink");
    a.hidden = false;
    a.href = `/api/jobs/${state.jobId}/download/${encodeURIComponent(name)}`;
    a.textContent = `下载 ${name}.urdf`;
  } catch (e) {
    $("exportOut").textContent = String(e);
    $("exportOut").classList.add("error");
  }
});

refreshHealth();