from datetime import datetime
from typing import Callable, Dict, Optional

from app.core.config import GlobalConfigSettings

from app.domains.analysis_task import CrawlerDetailDeal
from app.domains.analysis_task import AccountPositionReadRateAvg
from app.domains.analysis_task import AccountPositionReadAvg
from app.domains.analysis_task import AccountPositionOpenRateAvg
from app.domains.analysis_task import RateLimitedArticleFilter

from app.domains.algorithm_tasks import AccountCategoryAnalysis

from app.domains.cold_start_tasks import ArticlePoolColdStart

from app.domains.crawler_tasks import CrawlerToutiao
from app.domains.crawler_tasks import WeixinAccountManager
from app.domains.crawler_tasks import CrawlerGzhAccountArticles
from app.domains.crawler_tasks import CrawlerGzhSearchArticles

from app.domains.data_recycle_tasks import ArticleDetailStat
from app.domains.data_recycle_tasks import RecycleDailyPublishArticlesTask
from app.domains.data_recycle_tasks import RecycleOutsideAccountArticlesTask
from app.domains.data_recycle_tasks import CheckDailyPublishArticlesTask
from app.domains.data_recycle_tasks import UpdateRootSourceIdAndUpdateTimeTask
from app.domains.data_recycle_tasks import RecycleFwhDailyPublishArticlesTask
from app.domains.data_recycle_tasks import RecycleMiniProgramDetailTask
from app.domains.data_recycle_tasks import (
    UpdateOutsideRootSourceIdAndUpdateTimeTask,
)

from app.domains.llm_tasks import TitleRewrite
from app.domains.llm_tasks import ArticlePoolCategoryGeneration
from app.domains.llm_tasks import CandidateAccountQualityScoreRecognizer
from app.domains.llm_tasks import ExtractTitleFeatures

from app.domains.monitor_tasks import AutoReplyCardsMonitor
from app.domains.monitor_tasks import check_kimi_balance
from app.domains.monitor_tasks import GetOffVideos
from app.domains.monitor_tasks import CheckVideoAuditStatus
from app.domains.monitor_tasks import CooperateAccountsMonitorTask
from app.domains.monitor_tasks import InnerGzhArticlesMonitor
from app.domains.monitor_tasks import OutsideGzhArticlesMonitor
from app.domains.monitor_tasks import OutsideGzhArticlesCollector
from app.domains.monitor_tasks import TaskProcessingMonitor
from app.domains.monitor_tasks import LimitedAccountAnalysisTask

from app.jobs.task_config import TaskStatus
from app.jobs.task_utils import TaskValidationError


_TASK_HANDLER_REGISTRY: Dict[str, Callable] = {}


def register(task_name: str):
    def decorator(func):
        _TASK_HANDLER_REGISTRY[task_name] = func
        return func

    return decorator


class TaskHandler:
    """任务处理器基类 - 使用装饰器模式自动注册任务"""

    # 任务注册表
    _handlers = _TASK_HANDLER_REGISTRY

    def __init__(
        self,
        data: dict,
        log_service,
        db_client,
        trace_id: str,
        config: GlobalConfigSettings,
    ):
        self.data = data
        self.log_client = log_service
        self.db_client = db_client
        self.trace_id = trace_id
        self.config = config

    @classmethod
    def get_handler(cls, task_name: str) -> Optional[Callable]:
        """获取任务处理器"""
        return cls._handlers.get(task_name)

    @classmethod
    def list_registered_tasks(cls) -> list:
        """列出所有已注册的任务"""
        return list(cls._handlers.keys())

    async def _log_task_event(self, event_type: str, **kwargs):
        """统一的任务日志记录"""
        log_data = {
            "timestamp": datetime.now().isoformat(),
            "trace_id": self.trace_id,
            "event_type": event_type,
            "task": self.data.get("task_name"),
            **kwargs,
        }
        await self.log_client.log(contents=log_data)

    # ==================== 监控类任务 ====================

    @register("check_kimi_balance")
    async def _check_kimi_balance_handler(self) -> int:
        """检查 Kimi 余额"""
        response = await check_kimi_balance()
        await self._log_task_event("kimi_balance_checked", data=response)
        return TaskStatus.SUCCESS

    @register("get_off_videos")
    async def _get_off_videos_task_handler(self) -> int:
        """视频下架任务"""
        sub_task = GetOffVideos(self.db_client, self.log_client, self.trace_id)
        return await sub_task.deal()

    @register("check_publish_video_audit_status")
    async def _check_video_audit_status_handler(self) -> int:
        """检查视频审核状态"""
        sub_task = CheckVideoAuditStatus(self.db_client, self.log_client, self.trace_id)
        return await sub_task.deal()

    @register("task_processing_monitor")
    async def _task_processing_monitor_handler(self) -> int:
        """任务处理监控"""
        sub_task = TaskProcessingMonitor(self.db_client)
        await sub_task.deal()
        return TaskStatus.SUCCESS

    @register("inner_article_monitor")
    async def _inner_gzh_articles_monitor_handler(self) -> int:
        """内部公众号文章监控"""
        sub_task = InnerGzhArticlesMonitor(self.db_client)
        return await sub_task.deal()

    @register("outside_article_monitor")
    async def _outside_monitor_handler(self) -> int:
        """外部文章监控"""
        collector = OutsideGzhArticlesCollector(self.db_client)
        await collector.deal()
        monitor = OutsideGzhArticlesMonitor(self.db_client)
        return await monitor.deal()

    @register("cooperate_accounts_monitor")
    async def _cooperate_accounts_monitor_handler(self) -> int:
        """合作账号文章监测"""
        task = CooperateAccountsMonitorTask(
            pool=self.db_client, log_client=self.log_client
        )
        await task.deal(task_name="save_articles")
        return TaskStatus.SUCCESS

    @register("cooperate_accounts_detail")
    async def _cooperate_accounts_detail_handler(self) -> int:
        """合作账号文章详情更新"""
        task = CooperateAccountsMonitorTask(
            pool=self.db_client, log_client=self.log_client
        )
        await task.deal(task_name="get_detail")
        return TaskStatus.SUCCESS

    # ==================== 爬虫类任务 ====================

    @register("crawler_toutiao")
    async def _crawler_toutiao_handler(self) -> int:
        """头条文章/视频抓取"""
        sub_task = CrawlerToutiao(
            self.db_client, self.log_client, self.trace_id, self.config
        )
        method = self.data.get("method", "account")
        media_type = self.data.get("media_type", "article")
        category_list = self.data.get("category_list", [])

        match method:
            case "account":
                await sub_task.crawler_task(media_type=media_type)
            case "recommend":
                await sub_task.crawl_toutiao_recommend_task(category_list)
            case "search":
                await sub_task.search_candidate_accounts()
            case _:
                raise TaskValidationError(f"Unsupported method: {method}")

        return TaskStatus.SUCCESS

    @register("crawler_gzh_articles")
    async def _crawler_gzh_article_handler(self) -> int:
        """抓取公众号文章"""
        account_method = self.data.get("account_method")
        crawl_mode = self.data.get("crawl_mode")
        strategy = self.data.get("strategy")

        match crawl_mode:
            case "account":
                task = CrawlerGzhAccountArticles(
                    self.db_client, self.log_client, self.trace_id, self.config
                )
                await task.deal(account_method, strategy)
            case "search":
                task = CrawlerGzhSearchArticles(
                    self.db_client, self.log_client, self.trace_id, self.config
                )
                await task.deal(strategy)
            case _:
                raise TaskValidationError(f"Unsupported crawl mode: {crawl_mode}")

        return TaskStatus.SUCCESS

    @register("crawler_account_manager")
    async def _crawler_account_manager_handler(self) -> int:
        """账号管理任务"""
        platform = self.data.get("platform", "weixin")
        account_id_list = self.data.get("account_id_list")

        match platform:
            case "weixin":
                task = WeixinAccountManager(
                    self.db_client, self.log_client, self.trace_id
                )
                await task.deal(platform=platform, account_id_list=account_id_list)
            case _:
                raise TaskValidationError(f"Unsupported platform: {platform}")

        return TaskStatus.SUCCESS

    @register("crawler_detail_analysis")
    async def _crawler_article_analysis_handler(self) -> int:
        """抓取视频/文章详情分析统计"""
        task = CrawlerDetailDeal(pool=self.db_client, trace_id=self.trace_id)
        await task.deal(params=self.data)
        return TaskStatus.SUCCESS

    # ==================== 数据回收类任务 ====================
    @register("article_detail_stat")
    async def _article_detail_stat_handler(self) -> int:
        """文章详情统计"""
        task = ArticleDetailStat(self.db_client, self.log_client)
        await task.deal()
        return TaskStatus.SUCCESS

    @register("daily_publish_articles_recycle")
    async def _recycle_article_data_handler(self) -> int:
        """每日发文数据回收"""
        date_str = self.data.get("date_string") or datetime.now().strftime("%Y-%m-%d")
        recycle = RecycleDailyPublishArticlesTask(
            self.db_client, self.log_client, date_str
        )
        await recycle.deal()
        check = CheckDailyPublishArticlesTask(self.db_client, self.log_client, date_str)
        await check.deal()
        return TaskStatus.SUCCESS

    @register("update_root_source_id")
    async def _update_root_source_id_handler(self) -> int:
        """更新 root_source_id"""
        sub_task = UpdateRootSourceIdAndUpdateTimeTask(self.db_client, self.log_client)
        await sub_task.deal()
        return TaskStatus.SUCCESS

    @register("recycle_outside_account_articles")
    async def _recycle_outside_account_article_handler(self) -> int:
        """回收外部账号文章"""
        date_str = self.data.get("date_string") or datetime.now().strftime("%Y-%m-%d")
        task = RecycleOutsideAccountArticlesTask(
            pool=self.db_client, log_client=self.log_client, date_string=date_str
        )
        await task.deal()
        return TaskStatus.SUCCESS

    @register("update_outside_account_article_root_source_id")
    async def _update_outside_account_article_root_source_id_handler(self) -> int:
        """更新外部账号文章的 root_source_id"""
        task = UpdateOutsideRootSourceIdAndUpdateTimeTask(
            pool=self.db_client, log_client=self.log_client
        )
        await task.deal()
        return TaskStatus.SUCCESS

    @register("fwh_daily_recycle")
    async def _recycle_fwh_article_handler(self) -> int:
        """回收服务号文章"""
        task = RecycleFwhDailyPublishArticlesTask(self.db_client, self.log_client)
        await task.deal()
        return TaskStatus.SUCCESS

    # ==================== 算法类任务 ====================

    @register("article_pool_cold_start")
    async def _article_pool_cold_start_handler(self) -> int:
        """文章池冷启动"""
        cold_start = ArticlePoolColdStart(
            self.db_client, self.log_client, self.trace_id, self.config
        )
        platform = self.data.get("platform", "weixin")
        crawler_methods = self.data.get("crawler_methods", [])
        category_list = self.data.get("category_list", [])
        strategy = self.data.get("strategy", "strategy_v1")

        await cold_start.deal(
            platform=platform,
            crawl_methods=crawler_methods,
            category_list=category_list,
            strategy=strategy,
        )
        return TaskStatus.SUCCESS

    @register("candidate_account_quality_analysis")
    async def _candidate_account_quality_score_handler(self) -> int:
        """候选账号质量分析"""
        task = CandidateAccountQualityScoreRecognizer(
            self.db_client, self.log_client, self.trace_id
        )
        await task.deal()
        return TaskStatus.SUCCESS

    @register("article_pool_category_generation")
    async def _article_pool_category_generation_handler(self) -> int:
        """文章池品类生成"""
        task = ArticlePoolCategoryGeneration(
            self.db_client, self.log_client, self.trace_id
        )
        limit_num = self.data.get("limit")
        await task.deal(limit=limit_num)
        return TaskStatus.SUCCESS

    @register("account_category_analysis")
    async def _account_category_analysis_handler(self) -> int:
        """账号品类分析"""
        task = AccountCategoryAnalysis(
            pool=self.db_client,
            log_client=self.log_client,
            trace_id=self.trace_id,
            data=self.data,
            date_string=None,
        )
        await task.deal()
        return TaskStatus.SUCCESS

    @register("update_limited_account_info")
    async def _update_limited_account_info_handler(self) -> int:
        """更新限流账号信息"""
        task = LimitedAccountAnalysisTask(
            pool=self.db_client, log_client=self.log_client
        )
        await task.deal(date_string=self.data.get("date_string"))
        return TaskStatus.SUCCESS

    # ==================== LLM 类任务 ====================

    @register("title_rewrite")
    async def _title_rewrite_handler(self) -> int:
        """标题重写"""
        sub_task = TitleRewrite(self.db_client, self.log_client, self.trace_id)
        return await sub_task.deal()

    @register("extract_title_features")
    async def _extract_title_features_handler(self) -> int:
        """提取标题特征"""
        task = ExtractTitleFeatures(self.db_client, self.log_client, self.trace_id)
        await task.deal(data=self.data)
        return TaskStatus.SUCCESS

    # ==================== 统计分析类任务 ====================

    @register("update_account_read_rate_avg")
    async def _update_account_read_rate_avg_handler(self) -> int:
        """更新账号阅读率均值"""
        task = AccountPositionReadRateAvg(
            pool=self.db_client, log_client=self.log_client, trace_id=self.trace_id
        )
        await task.deal(end_date=self.data.get("end_date"))
        return TaskStatus.SUCCESS

    @register("update_account_read_avg")
    async def _update_account_read_avg_handler(self) -> int:
        """更新账号阅读均值"""
        task = AccountPositionReadAvg(
            pool=self.db_client, log_client=self.log_client, trace_id=self.trace_id
        )
        await task.deal(end_date=self.data.get("end_date"))
        return TaskStatus.SUCCESS

    @register("update_account_open_rate_avg")
    async def _update_account_open_rate_avg_handler(self) -> int:
        """更新账号打开率均值"""
        task = AccountPositionOpenRateAvg(
            pool=self.db_client, log_client=self.log_client, trace_id=self.trace_id
        )
        await task.deal(date_string=self.data.get("date_string"))
        return TaskStatus.SUCCESS

    # ==================== 自动化任务 ====================

    @register("auto_follow_account")
    async def _auto_follow_account_handler(self) -> int:
        """自动关注公众号"""
        task = AutoReplyCardsMonitor(
            pool=self.db_client, log_service=self.log_client, config=self.config
        )
        await task.deal(task_name="follow_gzh_task")
        return TaskStatus.SUCCESS

    @register("get_follow_result")
    async def _get_follow_result_handler(self) -> int:
        """获取自动关注回复"""
        task = AutoReplyCardsMonitor(
            pool=self.db_client, log_service=self.log_client, config=self.config
        )
        await task.deal(task_name="get_auto_reply_task")
        return TaskStatus.SUCCESS

    @register("extract_reply_result")
    async def _extract_reply_result_handler(self) -> int:
        """解析自动回复结果"""
        task = AutoReplyCardsMonitor(
            pool=self.db_client, log_service=self.log_client, config=self.config
        )
        await task.deal(task_name="extract_task")
        return TaskStatus.SUCCESS

    # ==================== 其他任务 ====================

    @register("mini_program_detail_process")
    async def _mini_program_detail_handler(self) -> int:
        """更新小程序裂变信息"""
        task = RecycleMiniProgramDetailTask(
            pool=self.db_client, log_client=self.log_client, trace_id=self.trace_id
        )
        await task.deal(params=self.data)
        return TaskStatus.SUCCESS

    @register("rate_limited_article_filter")
    async def _rate_limited_article_filter(self) -> int:
        """限流文章删除"""
        task = RateLimitedArticleFilter(pool=self.db_client, config=self.config)
        await task.deal()
        return TaskStatus.SUCCESS


__all__ = ["TaskHandler"]