#!/usr/bin/env python3
"""
读取 agent_test_cases.json（或 --cases 指定），批量执行 Agent 并做简单断言。
规范见：(红头)agent测试用例文档.md
"""
from __future__ import annotations

import argparse
import json
import os
import sys
import time
from typing import Any, Dict, List, Optional, Tuple

import requests

DEFAULT_CASES_FILE = "agent_test_cases.json"


def _ensure_utf8_stdio() -> None:
    if sys.platform != "win32":
        return
    for name in ("stdout", "stderr"):
        stream = getattr(sys, name, None)
        if stream is not None and hasattr(stream, "reconfigure"):
            try:
                stream.reconfigure(encoding="utf-8", errors="replace")
            except Exception:
                pass


_ensure_utf8_stdio()


def _login(base_url: str, username: str, password: str, timeout: float) -> Optional[Dict[str, str]]:
    r = requests.post(
        f"{base_url}/api/v1/auth/login",
        data={"username": username, "password": password},
        headers={"Content-Type": "application/x-www-form-urlencoded"},
        timeout=timeout,
    )
    if r.status_code != 200:
        print(f"[FAIL] 登录 {r.status_code}: {r.text[:500]}")
        return None
    token = r.json().get("access_token")
    if not token:
        print("[FAIL] 登录响应无 access_token")
        return None
    return {"Authorization": f"Bearer {token}"}


def _resolve_agent_id(
    base_url: str,
    headers: Dict[str, str],
    agent: Dict[str, Any],
    timeout: float,
) -> Optional[str]:
    if agent.get("id"):
        return str(agent["id"])
    name = agent.get("name")
    if not name:
        print("[FAIL] agent 需包含 id 或 name")
        return None
    r = requests.get(
        f"{base_url}/api/v1/agents",
        headers=headers,
        params={"search": name, "limit": 100},
        timeout=timeout,
    )
    if r.status_code != 200:
        print(f"[FAIL] 查找 Agent {r.status_code}: {r.text[:500]}")
        return None
    agents: List[Dict[str, Any]] = r.json() or []
    exact = [a for a in agents if (a.get("name") or "").strip() == name]
    pick = exact[0] if exact else (agents[0] if agents else None)
    if not pick:
        print(f"[FAIL] 未找到 Agent: {name}")
        return None
    print(f"[OK] Agent: {pick.get('name')} ({pick['id']}) status={pick.get('status')}")
    return str(pick["id"])


def _extract_output_text(output_data: Any) -> str:
    if output_data is None:
        return ""
    if isinstance(output_data, str):
        return output_data
    if isinstance(output_data, dict):
        for key in ("result", "output", "text", "content"):
            v = output_data.get(key)
            if v is not None:
                return v if isinstance(v, str) else str(v)
        return json.dumps(output_data, ensure_ascii=False)
    return str(output_data)


def _poll_until_terminal(
    base_url: str,
    headers: Dict[str, str],
    execution_id: str,
    max_wait: float,
    poll_interval: float,
    timeout: float,
) -> Tuple[str, Optional[Dict[str, Any]]]:
    deadline = time.time() + max_wait
    last_status = "unknown"
    while time.time() < deadline:
        sr = requests.get(
            f"{base_url}/api/v1/executions/{execution_id}/status",
            headers=headers,
            timeout=timeout,
        )
        if sr.status_code != 200:
            print(f"[WARN] status {sr.status_code}: {sr.text[:300]}")
            time.sleep(poll_interval)
            continue
        body = sr.json()
        last_status = str(body.get("status") or "")
        if last_status in ("completed", "failed", "cancelled", "awaiting_approval"):
            break
        time.sleep(poll_interval)
    dr = requests.get(
        f"{base_url}/api/v1/executions/{execution_id}",
        headers=headers,
        timeout=timeout,
    )
    if dr.status_code != 200:
        print(f"[FAIL] 获取执行详情 {dr.status_code}: {dr.text[:500]}")
        return last_status, None
    return last_status, dr.json()


def _check_expect(text: str, status: str, detail: Optional[Dict[str, Any]], expect: Dict[str, Any]) -> List[str]:
    errors: List[str] = []
    want_status = expect.get("status", "completed")
    if status != want_status:
        errors.append(f"状态期望 {want_status!r}，实际 {status!r}")
    if detail and status != "completed":
        em = detail.get("error_message")
        if em:
            errors.append(f"error_message: {em[:500]}")
    if not expect:
        return errors
    ci = bool(expect.get("case_insensitive"))
    hay = text if not ci else text.lower()
    for sub in expect.get("output_contains") or []:
        s = sub if not ci else sub.lower()
        if s not in hay:
            errors.append(f"输出应包含 {sub!r}")
    for sub in expect.get("output_not_contains") or []:
        s = sub if not ci else sub.lower()
        if s in hay:
            errors.append(f"输出不应包含 {sub!r}")
    return errors


def _run_one_case(
    base_url: str,
    headers: Dict[str, str],
    defaults: Dict[str, Any],
    case: Dict[str, Any],
) -> bool:
    cid = case.get("id", "(no-id)")
    title = case.get("name", "")
    print("\n" + "-" * 60)
    print(f"CASE {cid}" + (f" — {title}" if title else ""))

    req_timeout = float(case.get("request_timeout_sec", defaults.get("request_timeout_sec", 120)))
    max_wait = float(case.get("max_wait_sec", defaults.get("max_wait_sec", 300)))
    poll_iv = float(case.get("poll_interval_sec", defaults.get("poll_interval_sec", 2)))

    agent_id = _resolve_agent_id(base_url, headers, case.get("agent") or {}, req_timeout)
    if not agent_id:
        return False

    message = case.get("message")
    if message is None:
        print("[FAIL] 缺少 message")
        return False

    input_data: Dict[str, Any] = {"query": message, "USER_INPUT": message}
    extra = case.get("input_extra")
    if isinstance(extra, dict):
        input_data = {**extra, **input_data}

    er = requests.post(
        f"{base_url}/api/v1/executions",
        headers=headers,
        json={"agent_id": agent_id, "input_data": input_data},
        timeout=req_timeout,
    )
    if er.status_code != 201:
        print(f"[FAIL] 创建执行 {er.status_code}: {er.text[:800]}")
        return False
    ex = er.json()
    eid = ex["id"]
    print(f"[OK] execution_id={eid}")

    st, detail = _poll_until_terminal(base_url, headers, eid, max_wait, poll_iv, req_timeout)
    text = _extract_output_text((detail or {}).get("output_data"))
    expect = case.get("expect") or {}
    errs = _check_expect(text, st, detail, expect)
    if errs:
        for e in errs:
            print(f"[FAIL] {e}")
        if text:
            print("[OUTPUT_PREVIEW]")
            print(text[:2000] + ("…" if len(text) > 2000 else ""))
        return False
    print(f"[OK] 通过 status={st}")
    if text:
        print("[OUTPUT_PREVIEW]")
        print(text[:1200] + ("…" if len(text) > 1200 else ""))
    return True


def main() -> int:
    ap = argparse.ArgumentParser(description="批量运行 Agent 测试用例（JSON）")
    ap.add_argument(
        "--cases",
        default=os.environ.get("AGENT_TEST_CASES", DEFAULT_CASES_FILE),
        help=f"用例 JSON 路径（默认 {DEFAULT_CASES_FILE}）",
    )
    ap.add_argument("--username", default=None)
    ap.add_argument("--password", default=None)
    ap.add_argument("--base-url", default=None, help="覆盖 defaults.base_url / API_BASE_URL")
    args = ap.parse_args()

    path = args.cases
    if not os.path.isfile(path):
        print(f"[FAIL] 找不到用例文件: {path}")
        print("请先按 (红头)agent测试用例文档.md 创建 JSON，或复制示例为 agent_test_cases.json")
        return 2

    with open(path, encoding="utf-8") as f:
        spec = json.load(f)

    defaults = spec.get("defaults") or {}
    base_url = (
        args.base_url
        or defaults.get("base_url")
        or os.environ.get("API_BASE_URL", "http://localhost:8037")
    )
    base_url = base_url.rstrip("/")

    username = args.username or defaults.get("username", "admin")
    password = args.password or defaults.get("password", "123456")
    req_timeout = float(defaults.get("request_timeout_sec", 120))

    print(f"API: {base_url}")
    print(f"用例文件: {path}")

    headers = _login(base_url, username, password, req_timeout)
    if not headers:
        return 3

    cases: List[Dict[str, Any]] = spec.get("cases") or []
    if not cases:
        print("[FAIL] cases 为空")
        return 4

    ok, skip, fail = 0, 0, 0
    for case in cases:
        if case.get("enabled") is False:
            print(f"\n[SKIP] {case.get('id', '?')}")
            skip += 1
            continue
        if _run_one_case(base_url, headers, defaults, case):
            ok += 1
        else:
            fail += 1

    print("\n" + "=" * 60)
    print(f"汇总: 通过 {ok}  失败 {fail}  跳过 {skip}")
    return 0 if fail == 0 else 1


if __name__ == "__main__":
    sys.exit(main())