"""登录任务路由 + WebSocket 实时日志"""

import asyncio
import threading
from datetime import datetime
from fastapi import APIRouter, Depends, HTTPException, WebSocket, WebSocketDisconnect
from sqlalchemy.orm import Session

from ..database import get_db, SessionLocal
from ..models import User, Account, LoginTask, ProxyConfig as ProxyConfigModel
from ..schemas import LoginBatchRequest, LoginTaskOut
from ..deps import get_current_user, require_permission, authenticate_websocket
from ..permissions import user_has_permission, get_user_permissions
from ..services.login_service import LoginBatchRunner, batch_registry

router = APIRouter(prefix="/api/login", tags=["登录任务"])


@router.post("/batch")
async def create_batch(
    req: LoginBatchRequest,
    db: Session = Depends(get_db),
    current: User = Depends(require_permission("login:batch")),
):
    """创建批量登录任务。"""
    if not req.account_ids:
        raise HTTPException(status_code=400, detail="请选择账号")

    # 读取代理配置
    proxy = db.query(ProxyConfigModel).first()

    # 权限过滤账号
    valid_ids = []
    for aid in req.account_ids:
        acc = db.query(Account).filter(Account.id == aid).first()
        if not acc:
            continue
        if not user_has_permission(current, "login:view_all"):
            if acc.assigned_to != current.id:
                continue
        valid_ids.append(aid)

    if not valid_ids:
        raise HTTPException(status_code=403, detail="没有可登录的账号")

    # 在主事件循环中创建 log_queue，传给后台线程
    log_queue = asyncio.Queue()
    loop = asyncio.get_running_loop()

    # 创建执行器（用独立的 DB 会话，因为在线程中运行）
    thread_db = SessionLocal()
    runner = LoginBatchRunner(
        db=thread_db,
        account_ids=valid_ids,
        created_by=current.id,
        creator_permissions=get_user_permissions(current),
        max_geetest_retries=req.max_geetest_retries,
        max_proxy_retries=req.max_proxy_retries,
        proxy_config=proxy,
        log_queue=log_queue,
        loop=loop,
        concurrency=req.concurrency,
    )

    batch_id = runner.batch_id

    # 先注册到批次注册表，再启动线程，确保 WebSocket 连接时能找到
    batch_registry.register(batch_id, log_queue, loop, runner)

    # 启动线程
    thread = threading.Thread(target=runner.run, daemon=True)
    thread.start()

    return {"batch_id": batch_id, "count": len(valid_ids), "success": True}


@router.get("/tasks", response_model=list[LoginTaskOut])
def list_tasks(
    batch_id: str | None = None,
    db: Session = Depends(get_db),
    current: User = Depends(get_current_user),
):
    """查看登录任务列表。"""
    query = db.query(LoginTask).join(Account, LoginTask.account_id == Account.id)

    # 客服只能看自己账号的任务
    if not user_has_permission(current, "login:view_all"):
        query = query.filter(Account.assigned_to == current.id)

    if batch_id:
        query = query.filter(LoginTask.batch_id == batch_id)

    rows = query.order_by(LoginTask.id.desc()).limit(200).all()
    # 批量收集 account_id，一次性查出 username
    account_ids = [t.account_id for t in rows]
    accounts_map = {}
    if account_ids:
        accs = db.query(Account).filter(Account.id.in_(account_ids)).all()
        accounts_map = {a.id: a.username for a in accs}

    result = []
    for t in rows:
        result.append(LoginTaskOut(
            id=t.id, batch_id=t.batch_id, account_id=t.account_id,
            account_username=accounts_map.get(t.account_id, ""),
            status=t.status, cookie=t.cookie or "", message=t.message or "",
            created_by=t.created_by, created_at=t.created_at, finished_at=t.finished_at,
        ))
    return result


@router.delete("/tasks/{task_id}")
def delete_task(
    task_id: int,
    db: Session = Depends(get_db),
    current: User = Depends(require_permission("login:batch")),
):
    """删除单个登录任务。"""
    task = db.query(LoginTask).filter(LoginTask.id == task_id).first()
    if not task:
        raise HTTPException(status_code=404, detail="任务不存在")
    db.delete(task)
    db.commit()
    return {"message": "已删除", "success": True}


@router.delete("/tasks")
def delete_tasks(
    task_ids: str = "",
    db: Session = Depends(get_db),
    current: User = Depends(require_permission("login:batch")),
):
    """批量删除登录任务。"""
    if not task_ids:
        raise HTTPException(status_code=400, detail="请指定任务ID")
    ids = [int(x) for x in task_ids.split(",") if x.strip().isdigit()]
    if not ids:
        raise HTTPException(status_code=400, detail="无效的任务ID")
    deleted = db.query(LoginTask).filter(LoginTask.id.in_(ids)).delete(synchronize_session=False)
    db.commit()
    return {"message": f"已删除 {deleted} 个任务", "deleted": deleted, "success": True}


@router.post("/stop/{batch_id}")
def stop_batch(
    batch_id: str,
    current: User = Depends(require_permission("login:batch")),
):
    batch = batch_registry.get(batch_id)
    if batch:
        batch["runner"].stop()
        return {"message": "已发送停止信号", "success": True}
    raise HTTPException(status_code=404, detail="批次不存在或已结束")


@router.websocket("/ws/login/{batch_id}")
async def ws_login_logs(websocket: WebSocket, batch_id: str):
    """WebSocket 推送登录实时日志（需认证）。"""
    # 认证：从 cookie 或 token query param 验证用户身份
    user = authenticate_websocket(websocket)
    if not user:
        await websocket.close(code=1008, reason="未授权")
        return

    await websocket.accept()

    # 从已注册的批次中获取 log_queue（由 create_batch 创建）
    batch = batch_registry.get(batch_id)
    if not batch:
        await websocket.send_json({"level": "error", "message": "批次不存在或已结束"})
        await websocket.close()
        return

    log_queue: asyncio.Queue = batch["log_queue"]

    try:
        while True:
            try:
                msg = await asyncio.wait_for(log_queue.get(), timeout=30)
                await websocket.send_json(msg)
                # 收到 result 表示任务结束
                if msg.get("level") == "result":
                    await asyncio.sleep(0.1)
                    break
            except asyncio.TimeoutError:
                await websocket.send_json({"level": "heartbeat", "message": ""})
    except WebSocketDisconnect:
        pass
    finally:
        batch_registry.pop(batch_id)