// 验证 DuckDB 处理 Excel：加载 data.xlsx 并按部门统计金额
const dec = new TextDecoder();

async function chat(messages: any[]): Promise<string> {
  let url = "http://127.0.0.1:3100/api/chat";
  let body: any = { messages };
  let total = "", guard = 0;
  while (guard++ < 8) {
    const resp = await fetch(url, { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(body) });
    const reader = resp.body!.getReader();
    let buf = "", out = "", approval: any = null;
    while (true) {
      const { done, value } = await reader.read();
      if (done) break;
      buf += dec.decode(value, { stream: true });
      const lines = buf.split("\n"); buf = lines.pop() || "";
      for (const line of lines) {
        const t = line.trim(); if (!t.startsWith("data:")) continue;
        let ev: any; try { ev = JSON.parse(t.slice(5).trim()); } catch { continue; }
        if (ev.type === "token") out += ev.content;
        else if (ev.type === "toolcall") console.log("  [tool]", ev.toolcall.function.name);
        else if (ev.type === "approval_required") { approval = ev; }
        else if (ev.type === "error") console.log("  [error]", ev.content);
      }
    }
    total += out;
    if (!approval) break;
    url = "http://127.0.0.1:3100/api/approve";
    body = { approved: true, tool_call_id: approval.tool_call_id };
  }
  return total;
}

console.log("=== test: DuckDB analyze Excel ===");
const r = await chat([{ role: "user", content: "Load data.xlsx with load_excel, then use query_duckdb to sum 金额 by 部门 (department)." }]);
console.log("\nfinal reply (first 600):\n", r.slice(0, 600));
console.log("\nverdict:", /技术/.test(r) && /销售|市场/.test(r) ? "PASS: DuckDB group-by works" : "check reply");