import time
import math

from datetime import datetime
from typing import Optional, List, Dict
import pandas as pd
from pandas import DataFrame
from scipy import stats
from tqdm.asyncio import tqdm


class CrawlerAccountManagerConst:
    # 文章状态
    ARTICLE_LOW_SIMILARITY_STATUS = 0
    ARTICLE_INIT_STATUS = 1
    ARTICLE_PUBLISHED_STATUS = 2

    # 相似度阈值
    SIMILARITY_THRESHOLD = 0.4

    # 1天时间戳
    ONE_DAY_TIMESTAMP = 86400
    # 近30天时间戳
    THIRTY_DAYS_TIMESTAMP = 30 * ONE_DAY_TIMESTAMP


class CrawlerAccountManager(CrawlerAccountManagerConst):
    def __init__(self, pool, aliyun_log, trace_id):
        self.pool = pool
        self.aliyun_log = aliyun_log
        self.trace_id = trace_id

    @staticmethod
    def safe_float(x: float | None, default: float = 0.0) -> float:
        """把 None / NaN / Inf 统一替换成指定默认值"""
        return default if x is None or not math.isfinite(x) else float(x)

    async def get_crawling_accounts(self, platform) -> List[str]:
        """获取抓取账号信息"""
        match platform:
            case "weixin":
                query = f"""
                    select gh_id as 'account_id' from long_articles_accounts where is_using = 1;
                """
            case _:
                raise RuntimeError(f"Unknown platform: {platform}")

        account_list = await self.pool.async_fetch(query)
        return [i["account_id"] for i in account_list]


class WeixinAccountManager(CrawlerAccountManager):
    def __init__(self, pool, aliyun_log, trace_id):
        super().__init__(pool, aliyun_log, trace_id)
        self.pool = pool
        self.aliyun_log = aliyun_log
        self.trace_id = trace_id

    async def get_account_crawler_articles_info(
        self, account_id: str
    ) -> Optional[DataFrame]:
        """get articles and set as dataframe"""
        query = f"""
            select title, link, score, status, article_index, read_cnt, publish_time
            from crawler_meta_article where out_account_id = %s;
        """
        response = await self.pool.async_fetch(query=query, params=(account_id,))
        return DataFrame(
            response,
            columns=[
                "title",
                "link",
                "score",
                "status",
                "article_index",
                "read_cnt",
                "publish_time",
            ],
        )

    async def update_account_stat_detail(
        self, account_id: str, history_info: Dict, recently_info: Dict
    ) -> int:
        """更新账号统计详情"""
        query = f"""
            update long_articles_accounts 
            set history_publish_frequency = %s, history_score_ci_lower = %s, 
                recent_publish_frequency= %s, recent_score_ci_lower = %s, update_date = %s
            where gh_id = %s;
        """
        return await self.pool.async_save(
            query=query,
            params=(
                history_info["publish_frequency"],
                history_info["ci_lower"],
                recently_info["publish_frequency"],
                recently_info["ci_lower"],
                datetime.today().strftime("%Y-%m-%d"),
                account_id,
            ),
        )

    def analysis_dataframe(self, dataframe: DataFrame) -> Optional[Dict]:
        score_list = dataframe["score"].dropna()
        n = len(score_list)
        mean = score_list.mean() if n else 0.0
        # 置信区间
        if n < 2:
            ci_lower, ci_upper = 0.0, 0.0
        else:
            sem = stats.sem(score_list)  # 可能返回 NaN
            t_val = stats.t.ppf(0.975, df=n - 1)
            margin = t_val * sem if math.isfinite(sem) else 0.0
            ci_lower, ci_upper = mean - margin, mean + margin

        # 计算发文频率
        publish_times = pd.to_numeric(dataframe["publish_time"], errors="coerce")
        publish_times = publish_times.replace(
            [float("inf"), float("-inf")], pd.NA
        ).dropna()
        if len(publish_times) >= 2:
            dates = pd.to_datetime(publish_times, unit="s").dt.normalize()
            days_delta = max(int((dates.max() - dates.min()).days) + 1, 1)
            publish_frequency = len(publish_times) / days_delta
        else:
            publish_frequency = 0.0

        return {
            "publish_frequency": self.safe_float(publish_frequency),
            "ci_lower": self.safe_float(ci_lower),
            "ci_upper": self.safe_float(ci_upper),
        }

    async def analysis_single_account(self, account_id: str) -> int:
        dataframe = await self.get_account_crawler_articles_info(account_id)
        history_articles_analysis = self.analysis_dataframe(dataframe)
        thirty_days_before = int(time.time()) - self.THIRTY_DAYS_TIMESTAMP
        recent_30_days_df = dataframe[dataframe["publish_time"] >= thirty_days_before]
        recent_30_days_analysis = self.analysis_dataframe(recent_30_days_df)
        return await self.update_account_stat_detail(
            account_id, history_articles_analysis, recent_30_days_analysis
        )

    async def deal(self, platform, account_id_list: Optional[List[str]] = None) -> None:
        """deal"""
        if not account_id_list:
            account_id_list = await self.get_crawling_accounts(platform=platform)

        for account_id in tqdm(account_id_list):
            await self.analysis_single_account(account_id)