boss_dp/server/api/tasks.py

# -*- 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 datetime import datetime
from typing import Optional

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 MsgType, TaskStatus, TaskType, make_msg
from server.core.response import api_success, api_error
from server.models import BossAccount, TaskCreate, TaskLog, Task
from server.serializers import TaskCreateSerializer
from server.core.worker_manager import worker_manager
from server.core.task_dispatcher import task_dispatcher

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


def _format_timestamp(ts: float) -> str:
    """将时间戳转换为指定格式的字符串：2026-03-01T20:19:51"""
    dt = datetime.fromtimestamp(ts)
    return dt.strftime("%Y-%m-%dT%H:%M:%S")


def _task_to_dict(t) -> dict:
    """将任务实例（Task ORM）转为可序列化字典。"""
    return {
        "task_id": t.task_id,
        "task_type": str(t.task_type),
        "status": str(t.status),
        "worker_id": t.worker_id,
        "account_name": getattr(t, "account_name", None),
        "params": t.params or {},
        "progress": getattr(t, "progress", None),
        "result": t.result,
        "error": t.error,
        "created_at": (
            t.created_at.strftime("%Y-%m-%dT%H:%M:%S")
            if hasattr(t.created_at, "strftime")
            else _format_timestamp(t.created_at)
        ),
        "updated_at": (
            t.updated_at.strftime("%Y-%m-%dT%H:%M:%S")
            if hasattr(t.updated_at, "strftime")
            else _format_timestamp(t.updated_at)
        ),
    }


def _parse_limit(raw_value, default: int = 50, max_value: int = 200) -> int:
    """解析分页上限，避免非法参数导致 500。"""
    try:
        value = int(raw_value)
    except (TypeError, ValueError):
        return default
    if value <= 0:
        return default
    return min(value, max_value)


def _parse_positive_int(raw_value, default: int = 1) -> int:
    """解析正整数参数。"""
    try:
        value = int(raw_value)
    except (TypeError, ValueError):
        return default
    if value <= 0:
        return default
    return value


def _parse_task_status(raw_status: Optional[str]) -> Optional[TaskStatus]:
    """解析任务状态。为空时返回 None。"""
    if not raw_status:
        return None
    try:
        return TaskStatus(raw_status)
    except ValueError:
        return None


def _task_log_account_name(task_log: TaskLog) -> Optional[str]:
    """从任务日志里提取可识别的环境名。"""
    result = task_log.result if isinstance(task_log.result, dict) else {}
    params = task_log.params if isinstance(task_log.params, dict) else {}
    account_name = (
        result.get("browser_name")
        or result.get("account_name")
        or params.get("account_name")
        or params.get("browser_name")
    )
    if not account_name:
        return None
    return str(account_name).strip() or None


def _task_log_to_dict(task_log: TaskLog, account_name: Optional[str] = None) -> dict:
    """将 TaskLog 转为统一响应结构。"""
    return {
        "task_id": task_log.task_id,
        "task_type": task_log.task_type,
        "status": task_log.status,
        "worker_id": task_log.worker_id,
        "account_name": account_name or _task_log_account_name(task_log),
        "params": task_log.params if isinstance(task_log.params, dict) else {},
        "progress": None,
        "result": task_log.result,
        "error": task_log.error,
        "created_at": task_log.created_at.strftime("%Y-%m-%dT%H:%M:%S"),
        "updated_at": task_log.created_at.strftime("%Y-%m-%dT%H:%M:%S"),
    }


def _is_task_log_for_account(task_log: TaskLog, account: BossAccount) -> bool:
    """判断任务日志是否属于某个账号（用于账号任务列表兼容）。"""
    if task_log.worker_id and task_log.worker_id != account.worker_id:
        return False

    if account.current_task_id and task_log.task_id == account.current_task_id:
        return True

    matched_name = _task_log_account_name(task_log)
    if matched_name and matched_name == account.browser_name:
        return True

    params = task_log.params if isinstance(task_log.params, dict) else {}
    account_pk = str(account.pk)
    for key in ("id", "account_id", "boss_id"):
        value = params.get(key)
        if value is None:
            continue
        if str(value).strip() == account_pk:
            return True

    return False


def _list_tasks_by_account(account: BossAccount, task_status: Optional[TaskStatus], limit: Optional[int] = 50) -> list:
    """
    按账号维度查询任务列表，完全基于 Task 表。
    - 不再依赖内存中的 TaskInfo；
    - 你可以直接修改数据库中 Task.status/Task.result 等字段来影响这里的返回。
    """
    qs = Task.objects.filter(
        worker_id=account.worker_id,
        account_name=account.browser_name,
    ).order_by("-created_at")
    if task_status:
        qs = qs.filter(status=task_status.value if hasattr(task_status, "value") else str(task_status))

    if limit is not None:
        qs = qs[:limit]
    return [_task_to_dict(t) for t in qs]


@api_view(["GET", "POST"])
def task_list(request):
    """
    GET  -> 查询任务列表，支持以下过滤参数：
           - ?worker_id=       : 按 Worker ID 过滤
           - ?account_id=      : 按账号 ID 过滤（自动查询对应的 account_name）
           - ?status=          : 按任务状态过滤
           - ?limit=           : 返回条数上限，默认 50
    POST -> 提交新任务（支持 JSON 和 form-data）
    """
    if request.method == "GET":
        wid = request.query_params.get("worker_id")
        account_id = request.query_params.get("account_id")
        st = request.query_params.get("status")
        limit = _parse_limit(request.query_params.get("limit", 50))
        task_status = _parse_task_status(st)
        if st and task_status is None:
            return api_error(http_status.HTTP_400_BAD_REQUEST, f"不支持的任务状态: {st}")

        # 如果指定了 account_id，直接返回该账号的任务列表（兼容前端“查看任务”）
        if account_id:
            try:
                account_id = int(account_id)
                account = BossAccount.objects.get(pk=account_id)
            except (ValueError, BossAccount.DoesNotExist):
                return api_error(
                    http_status.HTTP_404_NOT_FOUND,
                    f"未找到 id={account_id} 的账号",
                )
            return api_success(_list_tasks_by_account(account, task_status=task_status, limit=limit))

        qs = Task.objects.all().order_by("-created_at")
        if wid:
            qs = qs.filter(worker_id=wid)
        if task_status:
            qs = qs.filter(status=task_status.value if hasattr(task_status, "value") else str(task_status))
        qs = qs[:limit]
        return api_success([_task_to_dict(t) for t in qs])

    # 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)
    if not ser.is_valid():
        logger.warning("任务提交参数校验失败: data=%s, errors=%s", data, ser.errors)
        from rest_framework.exceptions import ValidationError
        raise ValidationError(ser.errors)

    validated = ser.validated_data.copy()
    # boss_id 即 /api/accounts 返回的 id（账号主键），与 id/account_id 等价，均按主键查表
    account_id = (
        validated.pop("id", None)
        or validated.pop("account_id", None)
        or validated.pop("boss_id", None)
    )
    if account_id is not None:
        try:
            account_id = int(account_id)
        except (TypeError, ValueError):
            account_id = None
    req = TaskCreate(**validated)
    target_worker_id = req.worker_id or ""
    account_name = req.account_name or ""

    # 指定 id / account_id / boss_id（均为账号主键）时，按主键查表
    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、boss_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
    try:
        task = task_dispatcher.create_task(req)
    except ValueError as e:
        return api_error(http_status.HTTP_409_CONFLICT, str(e))

    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
                # 派发成功后，将状态设为 DISPATCHED（不是 task.status.value，因为那可能还是 PENDING）
                account.current_task_status = TaskStatus.DISPATCHED.value
                account.save(update_fields=["current_task_id", "current_task_status"])
                logger.info("账号 %s 任务关联: task_id=%s, status=%s", req.account_name, task.task_id, account.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(["POST"])
def task_cancel(request, task_id: str):
    """
    取消任务。
    - 若任务已结束（success/failed/cancelled）返回 409；
    - 若任务可取消：先写入 cancelled，再向 Worker 下发 TASK_CANCEL。
    """
    task = Task.objects.filter(task_id=task_id).first()
    if not task:
        return api_error(http_status.HTTP_404_NOT_FOUND, f"任务 {task_id} 不存在")

    active_status_values = {
        TaskStatus.PENDING.value,
        TaskStatus.DISPATCHED.value,
        TaskStatus.RUNNING.value,
    }
    if str(task.status) not in active_status_values:
        return api_error(http_status.HTTP_409_CONFLICT, f"任务当前状态为 {task.status}，不可取消")

    cancelled_task = task_dispatcher.cancel_task(task_id, error="任务已取消")
    if not cancelled_task:
        return api_error(http_status.HTTP_409_CONFLICT, "任务已结束或已被取消")

    if cancelled_task.worker_id:
        worker_manager.set_current_task(cancelled_task.worker_id, None)

    if cancelled_task.account_name:
        BossAccount.objects.filter(
            worker_id=cancelled_task.worker_id,
            browser_name=cancelled_task.account_name,
            current_task_id=cancelled_task.task_id,
        ).update(current_task_status=TaskStatus.CANCELLED.value)

    send_fn = worker_manager.get_send_fn(cancelled_task.worker_id)
    if send_fn:
        cancel_msg = make_msg(MsgType.TASK_CANCEL, task_id=cancelled_task.task_id)
        try:
            async_to_sync(send_fn)(cancel_msg)
        except Exception as e:
            logger.warning("向 Worker 下发任务取消失败 task_id=%s: %s", cancelled_task.task_id, e)

    return api_success(_task_to_dict(cancelled_task), msg="任务已取消")


@api_view(["GET"])
def task_list_by_account(request, account_id: int):
    """
    按账号 ID 查询任务列表（不支持按 task_id 查询）。
    - 兼容模式：不传 page/page_size 时，返回数组
    - 分页模式：传 page 或 page_size 时，返回 {total, page, page_size, results}
    """
    account = BossAccount.objects.filter(pk=account_id).first()
    if not account:
        return api_error(http_status.HTTP_404_NOT_FOUND, f"账号 {account_id} 不存在")

    st = request.query_params.get("status")
    task_status = _parse_task_status(st)
    if st and task_status is None:
        return api_error(http_status.HTTP_400_BAD_REQUEST, f"不支持的任务状态: {st}")

    # 旧接口兼容：默认返回数组，limit 控制条数
    enable_paging = ("page" in request.query_params) or ("page_size" in request.query_params)
    if not enable_paging:
        limit = _parse_limit(request.query_params.get("limit", 50))
        return api_success(_list_tasks_by_account(account, task_status=task_status, limit=limit))

    page = _parse_positive_int(request.query_params.get("page"), default=1)
    page_size = _parse_limit(
        request.query_params.get("page_size", request.query_params.get("limit", 20)),
        default=20,
        max_value=200,
    )

    all_items = _list_tasks_by_account(account, task_status=task_status, limit=None)
    total = len(all_items)
    start = (page - 1) * page_size
    end = start + page_size

    return api_success({
        "total": total,
        "page": page,
        "page_size": page_size,
        "results": all_items[start:end],
    })