#!/usr/bin/env python3
"""
E2E: 验证 subworkflow 真执行 + 父子 execution 关联链路。

用法:
  cd backend && .\\venv\\Scripts\\python.exe scripts/e2e_subworkflow_chain.py
"""
from __future__ import annotations

import os
import time
from typing import Any, Dict, Optional

import requests

BASE = os.getenv("PLATFORM_BASE_URL", "http://127.0.0.1:8037").rstrip("/")
USER = os.getenv("PLATFORM_USERNAME", "admin")
PWD = os.getenv("PLATFORM_PASSWORD", "123456")

CHILD_NAME = "E2E-Subworkflow-Child"
PARENT_NAME = "E2E-Subworkflow-Parent"


def _login_headers() -> Dict[str, str]:
    r = requests.post(
        f"{BASE}/api/v1/auth/login",
        data={"username": USER, "password": PWD},
        headers={"Content-Type": "application/x-www-form-urlencoded"},
        timeout=15,
    )
    r.raise_for_status()
    token = r.json().get("access_token")
    if not token:
        raise RuntimeError("登录成功但缺少 access_token")
    return {"Authorization": f"Bearer {token}", "Content-Type": "application/json"}


def _find_agent_id(h: Dict[str, str], name: str) -> Optional[str]:
    r = requests.get(f"{BASE}/api/v1/agents", params={"search": name, "limit": 100}, headers=h, timeout=30)
    r.raise_for_status()
    for a in r.json() or []:
        if a.get("name") == name:
            return a.get("id")
    return None


def _create_or_update_agent(
    h: Dict[str, str], name: str, desc: str, wf: Dict[str, Any]
) -> str:
    aid = _find_agent_id(h, name)
    if aid:
        r = requests.put(
            f"{BASE}/api/v1/agents/{aid}",
            headers=h,
            json={"description": desc, "workflow_config": wf},
            timeout=30,
        )
        r.raise_for_status()
        return aid

    r = requests.post(
        f"{BASE}/api/v1/agents",
        headers=h,
        json={"name": name, "description": desc, "workflow_config": wf},
        timeout=30,
    )
    r.raise_for_status()
    return r.json()["id"]


def _child_workflow() -> Dict[str, Any]:
    return {
        "nodes": [
            {"id": "start-1", "type": "start", "data": {"label": "开始"}, "position": {"x": 60, "y": 120}},
            {
                "id": "code-1",
                "type": "code",
                "data": {
                    "label": "子流程代码",
                    "language": "python",
                    "code": "q = input_data.get('query', '') if isinstance(input_data, dict) else ''\nresult = {'reply': f'子流程收到: {q}', 'child_ok': True}",
                },
                "position": {"x": 340, "y": 120},
            },
            {"id": "end-1", "type": "end", "data": {"label": "结束"}, "position": {"x": 620, "y": 120}},
        ],
        "edges": [
            {"id": "e_start_code", "source": "start-1", "target": "code-1", "sourceHandle": "right", "targetHandle": "left"},
            {"id": "e_code_end", "source": "code-1", "target": "end-1", "sourceHandle": "right", "targetHandle": "left"},
        ],
    }


def _parent_workflow(child_agent_id: str) -> Dict[str, Any]:
    return {
        "nodes": [
            {"id": "start-1", "type": "start", "data": {"label": "开始"}, "position": {"x": 60, "y": 120}},
            {
                "id": "sub-1",
                "type": "subworkflow",
                "data": {
                    "label": "调用子Agent",
                    "agent_id": child_agent_id,
                    "input_mapping": {"query": "query", "user_id": "user_id"},
                    "max_subworkflow_depth": 2,
                },
                "position": {"x": 340, "y": 120},
            },
            {"id": "end-1", "type": "end", "data": {"label": "结束"}, "position": {"x": 620, "y": 120}},
        ],
        "edges": [
            {"id": "e_start_sub", "source": "start-1", "target": "sub-1", "sourceHandle": "right", "targetHandle": "left"},
            {"id": "e_sub_end", "source": "sub-1", "target": "end-1", "sourceHandle": "right", "targetHandle": "left"},
        ],
    }


def _wait_execution(h: Dict[str, str], execution_id: str, timeout_s: float = 120.0) -> Dict[str, Any]:
    t0 = time.time()
    while time.time() - t0 < timeout_s:
        r = requests.get(f"{BASE}/api/v1/executions/{execution_id}", headers=h, timeout=30)
        r.raise_for_status()
        d = r.json()
        st = d.get("status")
        if st in ("completed", "failed"):
            return d
        time.sleep(1.2)
    raise TimeoutError(f"执行超时: {execution_id}")


def main() -> int:
    h = _login_headers()

    child_id = _create_or_update_agent(
        h, CHILD_NAME, "E2E 子流程 Agent", _child_workflow()
    )
    parent_id = _create_or_update_agent(
        h, PARENT_NAME, "E2E 父流程 Agent（含 subworkflow）", _parent_workflow(child_id)
    )

    print(f"child_agent={child_id}")
    print(f"parent_agent={parent_id}")

    create = requests.post(
        f"{BASE}/api/v1/executions",
        headers=h,
        json={
            "agent_id": parent_id,
            "input_data": {"query": "你好", "user_id": "e2e_sub_user"},
        },
        timeout=30,
    )
    create.raise_for_status()
    execution_id = create.json()["id"]
    print(f"execution={execution_id}")

    done = _wait_execution(h, execution_id)
    print(f"status={done.get('status')}")
    if done.get("status") != "completed":
        print(f"error={done.get('error_message')}")
        return 2

    chain = requests.get(
        f"{BASE}/api/v1/execution-logs/executions/{execution_id}/chain",
        headers=h,
        timeout=30,
    )
    chain.raise_for_status()
    tree = chain.json()
    child_count = len(tree.get("children") or [])
    print(f"child_executions={child_count}")
    if child_count < 1:
        print("未发现子执行记录，校验失败")
        return 3

    print("E2E 通过")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())