# -*- coding: utf-8 -*-
"""
任务提交与查询 API（需要登录）。
统一任务入口：前端通过 task_type 指定任务类型（如 check_login、boss_recruit）。
"""
import json
import logging

from asgiref.sync import async_to_sync
from rest_framework import status as http_status
from rest_framework.decorators import api_view

from common.protocol import TaskStatus, TaskType
from server.core.response import api_success, api_error
from server.models import BossAccount, TaskCreate
from server.serializers import TaskCreateSerializer, TaskOutSerializer
from server.core.worker_manager import worker_manager
from server.core.task_dispatcher import task_dispatcher

logger = logging.getLogger("server.api.tasks")


def _task_to_dict(t) -> dict:
    """将 TaskInfo 转为可序列化字典。"""
    return {
        "task_id": t.task_id,
        "task_type": t.task_type.value if hasattr(t.task_type, "value") else str(t.task_type),
        "status": t.status.value if hasattr(t.status, "value") else str(t.status),
        "worker_id": t.worker_id,
        "account_name": t.account_name,
        "params": t.params,
        "progress": t.progress,
        "result": t.result,
        "error": t.error,
        "created_at": t.created_at,
        "updated_at": t.updated_at,
    }


@api_view(["GET", "POST"])
def task_list(request):
    """
    GET  -> 查询任务列表，支持 ?worker_id= / ?status= / ?limit= 过滤
    POST -> 提交新任务（支持 JSON 和 form-data）
    """
    if request.method == "GET":
        wid = request.query_params.get("worker_id")
        st = request.query_params.get("status")
        limit = int(request.query_params.get("limit", 50))
        task_status = TaskStatus(st) if st else None
        tasks = task_dispatcher.list_tasks(worker_id=wid, status=task_status, limit=limit)
        return api_success([_task_to_dict(t) for t in tasks])

    # POST: 提交新任务
    data = request.data.copy()
    # form-data 中 params 可能是 JSON 字符串
    params_raw = data.get("params", {})
    if isinstance(params_raw, str):
        try:
            data["params"] = json.loads(params_raw) if params_raw.strip() else {}
        except (json.JSONDecodeError, ValueError):
            data["params"] = {}

    ser = TaskCreateSerializer(data=data)
    ser.is_valid(raise_exception=True)

    validated = ser.validated_data.copy()
    account_id = validated.pop("id", None)
    req = TaskCreate(**validated)
    target_worker_id = req.worker_id or ""
    account_name = req.account_name or ""

    # 指定 id 时，直接从数据库解析 worker_id 和 account_name
    if account_id:
        try:
            account = BossAccount.objects.get(pk=account_id)
        except BossAccount.DoesNotExist:
            return api_error(
                http_status.HTTP_404_NOT_FOUND,
                f"未找到 id={account_id} 的账号",
            )
        target_worker_id = account.worker_id
        account_name = account.browser_name
        req.worker_id = target_worker_id
        req.account_name = account_name

    if not target_worker_id and account_name:
        target_worker_id = worker_manager.find_worker_by_account(account_name)
        if not target_worker_id:
            return api_error(
                http_status.HTTP_404_NOT_FOUND,
                f"未找到拥有浏览器 '{account_name}' 的在线 Worker",
            )
        req.worker_id = target_worker_id

    if not target_worker_id:
        return api_error(http_status.HTTP_400_BAD_REQUEST, "请指定 id、worker_id 或 account_name")

    if not worker_manager.is_online(target_worker_id):
        return api_error(http_status.HTTP_503_SERVICE_UNAVAILABLE, f"Worker {target_worker_id} 不在线")

    req.worker_id = target_worker_id
    task = task_dispatcher.create_task(req)

    send_fn = worker_manager.get_send_fn(target_worker_id)
    if not send_fn:
        task.status = TaskStatus.FAILED
        task.error = "Worker WebSocket 连接不存在"
        return api_error(http_status.HTTP_503_SERVICE_UNAVAILABLE, "Worker WebSocket 连接不存在")

    success = async_to_sync(task_dispatcher.dispatch)(task, send_fn)
    if not success:
        return api_error(http_status.HTTP_503_SERVICE_UNAVAILABLE, f"任务派发失败: {task.error}")

    worker_manager.set_current_task(target_worker_id, task.task_id)

    # check_login 任务：关联账号的任务状态
    if req.task_type == TaskType.CHECK_LOGIN and req.account_name:
        try:
            account = BossAccount.objects.filter(
                browser_name=req.account_name, worker_id=target_worker_id,
            ).first()
            if account:
                account.current_task_id = task.task_id
                account.current_task_status = task.status.value
                account.save(update_fields=["current_task_id", "current_task_status"])
        except Exception as e:
            logger.warning("关联账号任务状态失败: %s", e)

    return api_success(_task_to_dict(task), http_status=http_status.HTTP_201_CREATED)


@api_view(["GET"])
def task_detail(request, task_id):
    """查询指定任务的状态和结果。"""
    task = task_dispatcher.get_task(task_id)
    if not task:
        return api_error(http_status.HTTP_404_NOT_FOUND, f"任务 {task_id} 不存在")
    return api_success(_task_to_dict(task))