"""微信指数检索词汇总：从 wxindex_trend_json 提取全部检索词并持久化每日指数。"""

from __future__ import annotations

from datetime import date, datetime, timedelta
from typing import Any

from app.hot_content.client import JsonApiClient
from app.hot_content.demand_export import get_wxindex_keywords
from app.hot_content.exceptions import HotContentFlowError
from app.hot_content.repository import HotContentRepository
from app.hot_content.timezone import SHANGHAI_TZ

WXINDEX_WORDS_LOOKBACK_DAYS = 7
WXINDEX_WORDS_UPDATE_WINDOW_DAYS = 7
WXINDEX_WORDS_RECORD_SINCE = date(2026, 6, 11)
WXINDEX_WORDS_MIN_MAX_SCORE = 100_000.0


def get_fetch_start_ymd_from_event(
    event_created_at: datetime,
    *,
    lookback_days: int = WXINDEX_WORDS_LOOKBACK_DAYS,
) -> str:
    """数据窗口左边界：事件创建日往前 N 天（yyyymmdd）。"""
    event_date = normalize_event_created_at(event_created_at).date()
    start_date = event_date - timedelta(days=lookback_days)
    return start_date.strftime("%Y%m%d")


def get_fetch_end_ymd_from_event(
    event_created_at: datetime,
    *,
    forward_days: int = WXINDEX_WORDS_UPDATE_WINDOW_DAYS,
) -> str:
    """数据窗口右边界：事件创建日后 N 天（yyyymmdd）。"""
    event_date = normalize_event_created_at(event_created_at).date()
    end_date = event_date + timedelta(days=forward_days)
    return end_date.strftime("%Y%m%d")


def get_fetch_ymd_bounds_from_event(
    event_created_at: datetime,
    *,
    lookback_days: int = WXINDEX_WORDS_LOOKBACK_DAYS,
    forward_days: int = WXINDEX_WORDS_UPDATE_WINDOW_DAYS,
) -> tuple[str, str]:
    return (
        get_fetch_start_ymd_from_event(
            event_created_at,
            lookback_days=lookback_days,
        ),
        get_fetch_end_ymd_from_event(
            event_created_at,
            forward_days=forward_days,
        ),
    )


def get_word_data_window_ymd_bounds(
    event_created_at: datetime,
    *,
    window_days: int = WXINDEX_WORDS_LOOKBACK_DAYS,
) -> tuple[str, str]:
    """事件创建日前后 N 天的数据窗口 [start_ymd, end_ymd]。"""
    event_date = normalize_event_created_at(event_created_at).date()
    start_date = event_date - timedelta(days=window_days)
    end_date = event_date + timedelta(days=window_days)
    return start_date.strftime("%Y%m%d"), end_date.strftime("%Y%m%d")


def get_wxindex_fetch_start_ymd(
    *,
    today: date | None = None,
    lookback_days: int = WXINDEX_WORDS_LOOKBACK_DAYS,
) -> str:
    """首次拉取起始日期：近 N 日（截至昨日）。"""
    start_ymd, _end_ymd = get_lookback_range(lookback_days, today=today)
    return start_ymd


def normalize_event_created_at(value: datetime | None) -> datetime:
    if value is None:
        return datetime.now(SHANGHAI_TZ)
    if value.tzinfo is None:
        return value.replace(tzinfo=SHANGHAI_TZ)
    return value.astimezone(SHANGHAI_TZ)


def is_word_update_active(
    event_created_at: datetime,
    *,
    today: date | None = None,
    window_days: int = WXINDEX_WORDS_UPDATE_WINDOW_DAYS,
) -> bool:
    """事件创建后 window_days 天内继续更新，超出则停止。"""
    current = today or datetime.now(SHANGHAI_TZ).date()
    event_date = normalize_event_created_at(event_created_at).date()
    return (current - event_date).days <= window_days


def get_wxindex_end_ymd(*, today: date | None = None) -> str:
    current = today or datetime.now(SHANGHAI_TZ).date()
    return (current - timedelta(days=1)).strftime("%Y%m%d")


def get_lookback_range(lookback_days: int, *, today: date | None = None) -> tuple[str, str]:
    """原流程使用的近 N 日区间（截至昨日）。"""
    current = today or datetime.now(SHANGHAI_TZ).date()
    end_date = current - timedelta(days=1)
    start_date = end_date - timedelta(days=max(lookback_days, 1))
    return start_date.strftime("%Y%m%d"), end_date.strftime("%Y%m%d")


def extract_searched_words(trend_json: dict[str, Any] | None) -> list[str]:
    """提取 wxindex_trend_json 中实际检索过微信指数的全部词（非仅最高分词）。"""
    if not isinstance(trend_json, dict):
        return []

    words: list[str] = []
    seen: set[str] = set()
    for item in trend_json.get("wxindex_searches") or []:
        if not isinstance(item, dict):
            continue
        keyword = str(item.get("keyword") or "").strip()
        if keyword and keyword not in seen:
            seen.add(keyword)
            words.append(keyword)

    if words:
        return words
    return get_wxindex_keywords(trend_json)


def parse_wxindex_total_scores(wx_resp: dict[str, Any]) -> list[dict[str, Any]]:
    rows = ((wx_resp.get("data") or {}).get("data") or [])
    if not isinstance(rows, list):
        return []

    series: list[dict[str, Any]] = []
    for row in rows:
        if not isinstance(row, dict):
            continue
        ymd = str(row.get("ymd") or "").strip()
        total_score = (row.get("channel_score") or {}).get("total_score")
        try:
            score_num = float(total_score) if total_score is not None else None
        except (TypeError, ValueError):
            score_num = None
        if ymd and score_num is not None:
            series.append({"ymd": ymd, "total_score": score_num})
    series.sort(key=lambda item: item["ymd"])
    return series


def fetch_wxindex_scores(
    api_client: JsonApiClient,
    api_url: str,
    *,
    keyword: str,
    start_ymd: str,
    end_ymd: str | None = None,
) -> list[dict[str, Any]]:
    payload = {
        "keyword": keyword,
        "start_ymd": start_ymd,
        "end_ymd": end_ymd or get_wxindex_end_ymd(),
    }
    wx_resp = api_client.post_json(api_url, payload)
    return parse_wxindex_total_scores(wx_resp)


def get_max_total_score(scores: list[dict[str, Any]]) -> float | None:
    """从指数序列中取 total_score 最大值。"""
    values: list[float] = []
    for item in scores:
        if not isinstance(item, dict):
            continue
        try:
            values.append(float(item["total_score"]))
        except (TypeError, ValueError, KeyError):
            continue
    if not values:
        return None
    return max(values)


def word_meets_max_score_threshold(
    scores: list[dict[str, Any]],
    *,
    min_max_score: float = WXINDEX_WORDS_MIN_MAX_SCORE,
) -> bool:
    """新增词时：最大值需严格大于阈值（不超过阈值则不添加）。"""
    max_score = get_max_total_score(scores)
    if max_score is None:
        return False
    return max_score > min_max_score


def filter_scores_in_ymd_window(
    scores: list[dict[str, Any]],
    *,
    start_ymd: str,
    end_ymd: str,
) -> list[dict[str, Any]]:
    start = str(start_ymd or "").strip()
    end = str(end_ymd or "").strip()
    if not start or not end:
        return []
    filtered: list[dict[str, Any]] = []
    for item in scores:
        if not isinstance(item, dict):
            continue
        ymd = str(item.get("ymd") or item.get("dt") or "").strip()
        if not ymd or ymd < start or ymd > end:
            continue
        filtered.append(item)
    filtered.sort(key=lambda row: str(row.get("ymd") or row.get("dt") or ""))
    return filtered


def word_has_high_score_in_window(
    scores: list[dict[str, Any]],
    *,
    start_ymd: str,
    end_ymd: str,
    min_score: float = WXINDEX_WORDS_MIN_MAX_SCORE,
) -> bool:
    """窗口内是否存在严格大于阈值的微信指数。"""
    window_scores = filter_scores_in_ymd_window(
        scores,
        start_ymd=start_ymd,
        end_ymd=end_ymd,
    )
    for item in window_scores:
        try:
            score = float(item["total_score"])
        except (TypeError, ValueError, KeyError):
            continue
        if score > min_score:
            return True
    return False


def merge_wxindex_score_series(
    *series_list: list[dict[str, Any]],
) -> list[dict[str, Any]]:
    merged: dict[str, dict[str, Any]] = {}
    for series in series_list:
        for item in series:
            if not isinstance(item, dict):
                continue
            ymd = str(item.get("ymd") or item.get("dt") or "").strip()
            if not ymd:
                continue
            try:
                total_score = float(item["total_score"])
            except (TypeError, ValueError, KeyError):
                continue
            merged[ymd] = {"ymd": ymd, "total_score": total_score}
    return sorted(merged.values(), key=lambda row: row["ymd"])


def get_word_score_bounds(
    scores: list[dict[str, Any]],
) -> tuple[str | None, str | None]:
    ymds = [
        str(item.get("ymd") or item.get("dt") or "").strip()
        for item in scores
        if isinstance(item, dict) and str(item.get("ymd") or item.get("dt") or "").strip()
    ]
    if not ymds:
        return None, None
    return min(ymds), max(ymds)


def word_scores_need_supplement(
    scores: list[dict[str, Any]],
    *,
    end_ymd: str | None = None,
    start_ymd: str,
) -> tuple[bool, str]:
    """判断词是否需要补数：缺起始段、缺最新日期，或完全无数据。"""
    if not scores:
        return True, "empty"
    target_end = end_ymd or get_wxindex_end_ymd()
    earliest_ymd, latest_ymd = get_word_score_bounds(scores)
    if earliest_ymd is None or latest_ymd is None:
        return True, "empty"
    if earliest_ymd > start_ymd:
        return True, "missing_start"
    if latest_ymd < target_end:
        return True, "missing_end"
    return False, "complete"


def get_supplement_fetch_range(
    scores: list[dict[str, Any]],
    *,
    end_ymd: str | None = None,
    start_ymd: str,
) -> tuple[str, str] | None:
    """计算补数 API 查询区间；无需补数时返回 None。"""
    need_supplement, reason = word_scores_need_supplement(
        scores,
        end_ymd=end_ymd,
        start_ymd=start_ymd,
    )
    if not need_supplement:
        return None

    target_end = end_ymd or get_wxindex_end_ymd()
    if reason == "empty":
        return start_ymd, target_end

    earliest_ymd, latest_ymd = get_word_score_bounds(scores)
    if earliest_ymd is None or latest_ymd is None:
        return start_ymd, target_end
    if earliest_ymd > start_ymd:
        return start_ymd, target_end
    return next_ymd(latest_ymd), target_end


def slice_scores_lookback(
    full_scores: list[dict[str, Any]],
    lookback_days: int,
    *,
    today: date | None = None,
) -> tuple[list[dict[str, Any]], str, str]:
    """从全量序列截取原流程所需的近 N 日数据。"""
    start_ymd, end_ymd = get_lookback_range(lookback_days, today=today)
    series = [
        item
        for item in full_scores
        if isinstance(item, dict)
        and start_ymd <= str(item.get("ymd") or "") <= end_ymd
    ]
    series.sort(key=lambda item: str(item.get("ymd") or ""))
    if series:
        return series, start_ymd, end_ymd
    return [], start_ymd, end_ymd


def next_ymd(ymd: str) -> str:
    current = datetime.strptime(ymd, "%Y%m%d").date()
    return (current + timedelta(days=1)).strftime("%Y%m%d")


def refresh_stale_wxindex_words(
    repository: HotContentRepository,
    api_client: JsonApiClient,
    api_url: str,
    *,
    end_ymd: str | None = None,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, int]:
    """补全已存在但缺少最新日期数据的词（仅含 meta 的新词）。"""
    target_end = end_ymd or get_wxindex_end_ymd()
    summary = {
        "target_end_ymd": target_end,
        "stale_words": 0,
        "refreshed": 0,
        "inserted_rows": 0,
        "skipped_rows": 0,
        "fetch_failed": 0,
        "api_empty": 0,
        "no_new_range": 0,
    }

    stale_words = repository.list_stale_wxindex_words(
        end_ymd=target_end,
        update_window_days=WXINDEX_WORDS_UPDATE_WINDOW_DAYS,
    )
    summary["stale_words"] = len(stale_words)
    if not stale_words:
        return summary

    for item in stale_words:
        name = str(item.get("name") or "").strip()
        if not name:
            continue

        word_start_ymd = str(item.get("fetch_start_ymd") or "").strip()
        if not word_start_ymd:
            word_start_ymd = get_wxindex_fetch_start_ymd()

        stored_scores = repository.list_wxindex_word_scores(name)
        fetch_range = get_supplement_fetch_range(
            stored_scores,
            end_ymd=target_end,
            start_ymd=word_start_ymd,
        )
        if fetch_range is None:
            summary["no_new_range"] += 1
            if verbose:
                print(f"skip complete word={name}")
            continue

        start_ymd, end_ymd = fetch_range
        if start_ymd > end_ymd:
            summary["no_new_range"] += 1
            if verbose:
                print(f"skip up-to-date word={name}")
            continue

        if dry_run:
            summary["refreshed"] += 1
            if verbose:
                print(f"[dry-run] would refresh word={name} {start_ymd}->{end_ymd}")
            continue

        try:
            api_scores = fetch_wxindex_scores(
                api_client,
                api_url,
                keyword=name,
                start_ymd=start_ymd,
                end_ymd=end_ymd,
            )
            if not api_scores:
                summary["api_empty"] += 1
                if verbose:
                    print(f"api empty word={name} range={start_ymd}->{end_ymd}")
                continue

            inserted, skipped = repository.save_wxindex_daily_scores(
                name=name,
                scores=api_scores,
            )
        except Exception as exc:
            summary["fetch_failed"] += 1
            if verbose:
                print(f"refresh failed word={name}: {exc}")
            continue

        if inserted <= 0:
            summary["api_empty"] += 1
            if verbose:
                print(
                    f"no new rows word={name} range={start_ymd}->{end_ymd} "
                    f"api_rows={len(api_scores)} skipped={skipped}"
                )
            continue

        summary["refreshed"] += 1
        summary["inserted_rows"] += inserted
        summary["skipped_rows"] += skipped
        if verbose:
            print(
                f"refreshed word={name} range={start_ymd}->{end_ymd} "
                f"inserted={inserted} skipped={skipped}"
            )

    return summary


def sync_wxindex_words_from_meta(
    repository: HotContentRepository,
    api_client: JsonApiClient,
    api_url: str,
    *,
    end_ymd: str | None = None,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, Any]:
    """
    按 hot_content_wxindex_word_meta 同步 hot_content_wxindex_words。

    1. 删除 meta 中不存在的词
    2. 删除窗口 [fetch_start_ymd, fetch_end_ymd] 外的日期
    3. 补全窗口内缺失日期（含 fetch_start 早于昨日的历史段，如 20260615 之前）
    """
    target_end = end_ymd or get_wxindex_end_ymd()
    summary: dict[str, Any] = {
        "target_end_ymd": target_end,
        "meta_count": 0,
        "deleted_without_meta_rows": 0,
        "deleted_outside_window_rows": 0,
        "words_need_refresh": 0,
        "refreshed": 0,
        "inserted_rows": 0,
        "skipped_rows": 0,
        "fetch_failed": 0,
        "api_empty": 0,
        "no_new_range": 0,
        "dry_run": dry_run,
    }

    if dry_run:
        summary["deleted_without_meta_rows"] = repository.count_wxindex_words_without_meta()
        summary["deleted_outside_window_rows"] = (
            repository.count_wxindex_words_outside_event_window()
        )
    else:
        summary["deleted_without_meta_rows"] = repository.delete_wxindex_words_without_meta()
        summary["deleted_outside_window_rows"] = (
            repository.delete_wxindex_words_outside_event_window()
        )

    meta_rows = repository.list_all_wxindex_word_meta()
    summary["meta_count"] = len(meta_rows)

    for meta in meta_rows:
        name = str(meta.get("name") or "").strip()
        fetch_start = str(meta.get("fetch_start_ymd") or "").strip()
        fetch_end = str(meta.get("fetch_end_ymd") or "").strip()
        if not name or not fetch_start or not fetch_end:
            continue

        api_end = min(fetch_end, target_end)
        if fetch_start > api_end:
            summary["no_new_range"] += 1
            if verbose:
                print(
                    f"skip out-of-range word={name} "
                    f"window={fetch_start}~{fetch_end} api_end={api_end}"
                )
            continue

        stored_scores = repository.list_wxindex_word_scores(name)
        fetch_range = get_supplement_fetch_range(
            stored_scores,
            end_ymd=api_end,
            start_ymd=fetch_start,
        )
        if fetch_range is None:
            summary["no_new_range"] += 1
            if verbose:
                print(f"skip complete word={name} window={fetch_start}~{fetch_end}")
            continue

        summary["words_need_refresh"] += 1
        start_ymd, range_end = fetch_range
        if start_ymd > range_end:
            summary["no_new_range"] += 1
            if verbose:
                print(f"skip up-to-date word={name}")
            continue

        if dry_run:
            summary["refreshed"] += 1
            if verbose:
                print(
                    f"[dry-run] would fetch word={name} "
                    f"{start_ymd}->{range_end} "
                    f"save_window={fetch_start}~{fetch_end}"
                )
            continue

        try:
            api_scores = fetch_wxindex_scores(
                api_client,
                api_url,
                keyword=name,
                start_ymd=start_ymd,
                end_ymd=range_end,
            )
            window_scores = filter_scores_in_ymd_window(
                api_scores,
                start_ymd=fetch_start,
                end_ymd=fetch_end,
            )
            if not window_scores:
                summary["api_empty"] += 1
                if verbose:
                    print(
                        f"api empty word={name} fetch={start_ymd}->{range_end} "
                        f"window={fetch_start}~{fetch_end}"
                    )
                continue

            inserted, skipped = repository.save_wxindex_daily_scores(
                name=name,
                scores=window_scores,
            )
        except Exception as exc:
            summary["fetch_failed"] += 1
            if verbose:
                print(f"sync failed word={name}: {exc}")
            continue

        if inserted <= 0:
            summary["api_empty"] += 1
            if verbose:
                print(
                    f"no new rows word={name} fetch={start_ymd}->{range_end} "
                    f"api_rows={len(window_scores)} skipped={skipped}"
                )
            continue

        summary["refreshed"] += 1
        summary["inserted_rows"] += inserted
        summary["skipped_rows"] += skipped
        if verbose:
            print(
                f"synced word={name} fetch={start_ymd}->{range_end} "
                f"inserted={inserted} skipped={skipped}"
            )

    return summary


def cleanup_low_max_wxindex_words(
    repository: HotContentRepository,
    *,
    min_max_score: float = WXINDEX_WORDS_MIN_MAX_SCORE,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, int | float]:
    """删除各 dt 最大值低于阈值的词（按 name 整词删除）。"""
    summary: dict[str, int | float] = {
        "min_max_score": min_max_score,
        "low_max_words": 0,
        "deleted_rows": 0,
    }
    low_words = repository.list_low_max_wxindex_words(min_max_score=min_max_score)
    summary["low_max_words"] = len(low_words)
    if not low_words:
        return summary

    if dry_run:
        if verbose:
            for item in low_words:
                print(
                    f"[dry-run] would delete word={item['name']} "
                    f"max_score={item['max_score']:.0f} rows={item['row_count']}"
                )
        summary["deleted_rows"] = sum(int(item["row_count"]) for item in low_words)
        return summary

    names = [str(item["name"]) for item in low_words if str(item.get("name") or "").strip()]
    deleted_rows = repository.delete_wxindex_words_by_names(names)
    summary["deleted_rows"] = deleted_rows
    if verbose:
        for item in low_words:
            print(
                f"deleted word={item['name']} "
                f"max_score={item['max_score']:.0f} rows={item['row_count']}"
            )
    return summary


def try_register_wxindex_word_meta(
    repository: HotContentRepository,
    *,
    word: str,
    event_created_at: datetime | None = None,
    event_map: dict[str, datetime] | None = None,
    first_row_created_at: datetime | None = None,
    include_expired: bool = False,
    dry_run: bool = False,
    update_if_exists: bool = False,
) -> tuple[dict[str, Any] | None, str]:
    """补写 meta；返回 (meta, reason)。"""
    name = str(word or "").strip()
    if not name:
        return None, "empty"

    existing = repository.get_wxindex_word_meta(name)

    resolved_event_at = event_created_at
    if resolved_event_at is None and event_map is not None:
        resolved_event_at = event_map.get(name)
    if resolved_event_at is None:
        resolved_event_at = first_row_created_at
    if resolved_event_at is None:
        resolved_event_at = repository.get_wxindex_word_first_row_created_at(name)
    if resolved_event_at is None:
        if existing:
            return existing, "exists"
        return None, "no_event"

    normalized_event_at = normalize_event_created_at(resolved_event_at)
    if not include_expired and not is_word_update_active(normalized_event_at):
        if existing and not update_if_exists:
            return existing, "exists"
        if not existing:
            return None, "expired"

    fetch_start_ymd = get_fetch_start_ymd_from_event(normalized_event_at)
    fetch_end_ymd = get_fetch_end_ymd_from_event(normalized_event_at)
    if dry_run:
        return {
            "name": name,
            "event_created_at": normalized_event_at,
            "fetch_start_ymd": fetch_start_ymd,
            "fetch_end_ymd": fetch_end_ymd,
        }, "dry_run"

    if existing and update_if_exists:
        repository.update_wxindex_word_meta(
            name=name,
            event_created_at=normalized_event_at,
            fetch_start_ymd=fetch_start_ymd,
            fetch_end_ymd=fetch_end_ymd,
        )
        meta = repository.get_wxindex_word_meta(name)
        if meta is None:
            raise HotContentFlowError(f"failed to update wxindex word meta: {name}")
        return meta, "updated"

    if existing:
        return existing, "exists"

    meta = repository.ensure_wxindex_word_meta(
        name=name,
        event_created_at=normalized_event_at,
        fetch_start_ymd=fetch_start_ymd,
        fetch_end_ymd=fetch_end_ymd,
    )
    return meta, "registered"


def fix_wxindex_word_meta_fetch_bounds(
    repository: HotContentRepository,
    *,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, int]:
    """按 event_created_at 修正 meta.fetch_start_ymd / fetch_end_ymd。"""
    rows = repository.list_all_wxindex_word_meta()
    summary = {
        "total": len(rows),
        "updated": 0,
        "unchanged": 0,
    }
    for row in rows:
        name = str(row.get("name") or "").strip()
        event_created_at = row.get("event_created_at")
        old_fetch_start = str(row.get("fetch_start_ymd") or "").strip()
        old_fetch_end = str(row.get("fetch_end_ymd") or "").strip()
        if not name or event_created_at is None:
            continue
        new_fetch_start, new_fetch_end = get_fetch_ymd_bounds_from_event(event_created_at)
        if new_fetch_start == old_fetch_start and new_fetch_end == old_fetch_end:
            summary["unchanged"] += 1
            continue
        if dry_run:
            summary["updated"] += 1
            if verbose:
                print(
                    f"[dry-run] word={name} "
                    f"start {old_fetch_start}->{new_fetch_start} "
                    f"end {old_fetch_end}->{new_fetch_end}"
                )
            continue
        repository.update_wxindex_word_meta(
            name=name,
            event_created_at=event_created_at,
            fetch_start_ymd=new_fetch_start,
            fetch_end_ymd=new_fetch_end,
        )
        summary["updated"] += 1
        if verbose:
            print(
                f"updated word={name} "
                f"start {old_fetch_start}->{new_fetch_start} "
                f"end {old_fetch_end}->{new_fetch_end}"
            )
    return summary


def fix_wxindex_word_meta_fetch_start_ymd(
    repository: HotContentRepository,
    *,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, int]:
    """按 event_created_at 往前 7 天，批量修正 meta.fetch_start_ymd。"""
    return fix_wxindex_word_meta_fetch_bounds(
        repository,
        dry_run=dry_run,
        verbose=verbose,
    )


def cleanup_wxindex_words_outside_event_window(
    repository: HotContentRepository,
    *,
    window_days: int = WXINDEX_WORDS_LOOKBACK_DAYS,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, int]:
    """删除 hot_content_wxindex_words 中超出 event_created_at 前后 window_days 的数据。"""
    to_delete = repository.count_wxindex_words_outside_event_window(
        window_days=window_days,
    )
    summary = {
        "window_days": window_days,
        "rows_to_delete": to_delete,
        "deleted_rows": 0,
        "words_without_meta_rows": repository.count_wxindex_words_without_meta(),
    }
    if to_delete <= 0:
        return summary

    if dry_run:
        if verbose:
            samples = repository.list_wxindex_words_outside_event_window_samples(
                window_days=window_days,
                limit=20,
            )
            for item in samples:
                print(
                    f"[dry-run] word={item['name']} dt={item['dt']} "
                    f"window={item['start_ymd']}~{item['end_ymd']} "
                    f"event_created_at={item['event_created_at']}"
                )
        return summary

    summary["deleted_rows"] = repository.delete_wxindex_words_outside_event_window(
        window_days=window_days,
    )
    if verbose:
        print(f"deleted_rows={summary['deleted_rows']}")
    return summary


def build_word_earliest_event_map(
    repository: HotContentRepository,
    *,
    since_dt: datetime,
) -> dict[str, datetime]:
    """从热点记录中汇总每个检索词对应的最早事件创建时间。"""
    return repository.list_word_earliest_event_times(since_dt=since_dt)


def backfill_wxindex_word_meta(
    repository: HotContentRepository,
    *,
    since_date: date = WXINDEX_WORDS_RECORD_SINCE,
    include_expired: bool = True,
    fix_fetch_start: bool = True,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, Any]:
    """为 hot_content_wxindex_words 中缺 meta 的词补登记，并修正 fetch_start_ymd。"""
    since_dt = datetime.combine(since_date, datetime.min.time()).replace(tzinfo=SHANGHAI_TZ)
    event_map = build_word_earliest_event_map(repository, since_dt=since_dt)
    candidates = repository.list_wxindex_word_bounds_without_meta()
    register_summary: dict[str, int | str | bool] = {
        "since_date": since_date.isoformat(),
        "include_expired": include_expired,
        "candidates": len(candidates),
        "registered": 0,
        "skipped_expired": 0,
        "skipped_no_event": 0,
    }

    for item in candidates:
        name = str(item.get("name") or "").strip()
        if not name:
            continue
        meta, reason = try_register_wxindex_word_meta(
            repository,
            word=name,
            event_map=event_map,
            first_row_created_at=item.get("first_created_at"),
            include_expired=include_expired,
            dry_run=dry_run,
        )
        if reason in {"registered", "dry_run", "updated"}:
            register_summary["registered"] += 1
            if verbose:
                label = "[dry-run] would register" if dry_run else "registered"
                print(f"{label} meta word={name} event_at={meta['event_created_at']}")
        elif reason == "expired":
            register_summary["skipped_expired"] += 1
            if verbose:
                print(f"skip expired word={name}")
        elif reason == "no_event":
            register_summary["skipped_no_event"] += 1
            if verbose:
                print(f"skip no_event word={name}")

    fetch_start_summary: dict[str, int] | None = None
    if fix_fetch_start:
        fetch_start_summary = fix_wxindex_word_meta_fetch_start_ymd(
            repository,
            dry_run=dry_run,
            verbose=verbose,
        )

    return {
        "register": register_summary,
        "fetch_start_fix": fetch_start_summary,
    }


def backfill_active_wxindex_word_meta(
    repository: HotContentRepository,
    *,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, int | str]:
    """为表中仍处 7 天窗口内、但缺少 meta 的词补登记。"""
    current = datetime.now(SHANGHAI_TZ).date()
    since_dt = datetime.combine(
        current - timedelta(days=WXINDEX_WORDS_UPDATE_WINDOW_DAYS),
        datetime.min.time(),
    ).replace(tzinfo=SHANGHAI_TZ)
    event_map = build_word_earliest_event_map(repository, since_dt=since_dt)
    candidates = repository.list_wxindex_word_bounds_without_meta()
    summary: dict[str, int | str] = {
        "active_since": since_dt.date().isoformat(),
        "candidates": len(candidates),
        "registered": 0,
        "skipped_expired": 0,
        "skipped_no_event": 0,
    }

    for item in candidates:
        name = str(item.get("name") or "").strip()
        if not name:
            continue
        meta, reason = try_register_wxindex_word_meta(
            repository,
            word=name,
            event_map=event_map,
            first_row_created_at=item.get("first_created_at"),
            dry_run=dry_run,
        )
        if reason == "registered":
            summary["registered"] += 1
            if verbose:
                print(f"registered meta word={name} event_at={meta['event_created_at']}")
        elif reason == "dry_run":
            summary["registered"] += 1
            if verbose:
                print(f"[dry-run] would register meta word={name}")
        elif reason == "expired":
            summary["skipped_expired"] += 1
            if verbose:
                print(f"skip expired word={name}")
        elif reason == "no_event":
            summary["skipped_no_event"] += 1
            if verbose:
                print(f"skip no_event word={name}")

    return summary


def run_wxindex_words_daily_job(
    repository: HotContentRepository,
    api_client: JsonApiClient,
    api_url: str,
    *,
    end_ymd: str | None = None,
    min_max_score: float = WXINDEX_WORDS_MIN_MAX_SCORE,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, Any]:
    """定时任务：补 meta、补全缺失日期、清理低最大值词。"""
    meta_summary = backfill_active_wxindex_word_meta(
        repository,
        dry_run=dry_run,
        verbose=verbose,
    )
    refresh_summary = refresh_stale_wxindex_words(
        repository,
        api_client,
        api_url,
        end_ymd=end_ymd,
        dry_run=dry_run,
        verbose=verbose,
    )
    cleanup_summary = cleanup_low_max_wxindex_words(
        repository,
        min_max_score=min_max_score,
        dry_run=dry_run,
        verbose=verbose,
    )
    return {
        "meta_backfill": meta_summary,
        "refresh": refresh_summary,
        "cleanup": cleanup_summary,
    }


def ensure_word_full_scores(
    repository: HotContentRepository,
    api_client: JsonApiClient,
    api_url: str,
    *,
    keyword: str,
    end_ymd: str | None = None,
    event_created_at: datetime | None = None,
    include_expired: bool = False,
    force_refresh: bool = False,
    dry_run: bool = False,
    update_meta_if_exists: bool = False,
) -> tuple[list[dict[str, Any]], str]:
    """
    获取词微信指数并入库。

    - meta 表：窗口内存在指数 > 10 万才写入/更新
    - wxindex_words：仅保留 [fetch_start_ymd, fetch_end_ymd] 区间内数据
    - 超过 7 天窗口：不再更新

    返回 (scores, action)。
    """
    word = str(keyword or "").strip()
    if not word:
        return [], "empty"

    target_end = end_ymd or get_wxindex_end_ymd()
    stored_scores = repository.list_wxindex_word_scores(word)
    meta = repository.get_wxindex_word_meta(word)

    should_register_meta = meta is None and event_created_at is not None
    should_update_meta = (
        update_meta_if_exists
        and meta is not None
        and event_created_at is not None
    )

    fetch_start_ymd: str | None = None
    fetch_end_ymd: str | None = None

    if event_created_at is not None:
        normalized_event_at = normalize_event_created_at(event_created_at)
        if not include_expired and not is_word_update_active(normalized_event_at):
            if meta is None:
                return stored_scores, "expired"
            if not should_update_meta:
                return stored_scores, "expired"
        fetch_start_ymd, fetch_end_ymd = get_fetch_ymd_bounds_from_event(
            normalized_event_at
        )
    elif meta is not None:
        fetch_start_ymd = str(meta.get("fetch_start_ymd") or "").strip()
        fetch_end_ymd = str(meta.get("fetch_end_ymd") or "").strip()
        if not fetch_end_ymd:
            fetch_end_ymd = get_fetch_end_ymd_from_event(meta["event_created_at"])
        if not include_expired and not is_word_update_active(meta["event_created_at"]):
            return stored_scores, "expired"
    else:
        return stored_scores, "legacy"

    if not fetch_start_ymd or not fetch_end_ymd:
        return stored_scores, "legacy"

    api_end_ymd = min(fetch_end_ymd, target_end)
    fetch_range = None if force_refresh else get_supplement_fetch_range(
        stored_scores,
        end_ymd=api_end_ymd,
        start_ymd=fetch_start_ymd,
    )
    if fetch_range is None and stored_scores and meta is not None and not should_update_meta:
        merged_scores = merge_wxindex_score_series(stored_scores)
        window_scores = filter_scores_in_ymd_window(
            merged_scores,
            start_ymd=fetch_start_ymd,
            end_ymd=fetch_end_ymd,
        )
        return window_scores, "cached"

    if dry_run:
        return [], "dry_run"

    had_data = bool(stored_scores)
    start_ymd, fetch_end_ymd_api = fetch_range or (fetch_start_ymd, api_end_ymd)
    api_scores: list[dict[str, Any]] = []
    if fetch_range is not None or not stored_scores or force_refresh:
        api_scores = fetch_wxindex_scores(
            api_client,
            api_url,
            keyword=word,
            start_ymd=start_ymd,
            end_ymd=fetch_end_ymd_api,
        )

    merged_scores = merge_wxindex_score_series(stored_scores, api_scores)
    window_scores = filter_scores_in_ymd_window(
        merged_scores,
        start_ymd=fetch_start_ymd,
        end_ymd=fetch_end_ymd,
    )

    if should_register_meta or should_update_meta:
        if not word_has_high_score_in_window(
            window_scores,
            start_ymd=fetch_start_ymd,
            end_ymd=fetch_end_ymd,
        ):
            return stored_scores, "below_threshold"
        meta, register_reason = try_register_wxindex_word_meta(
            repository,
            word=word,
            event_created_at=event_created_at,
            include_expired=include_expired,
            dry_run=dry_run,
            update_if_exists=should_update_meta,
        )
        if meta is None:
            if register_reason == "expired":
                return stored_scores, "expired"
            return stored_scores, "legacy"
    elif meta is None:
        return stored_scores, "below_threshold"

    if meta is None:
        return stored_scores, "legacy"

    if not api_scores and not window_scores:
        return stored_scores, "api_empty"

    if not had_data and not word_has_high_score_in_window(
        window_scores,
        start_ymd=fetch_start_ymd,
        end_ymd=fetch_end_ymd,
    ):
        return [], "below_threshold"

    inserted, _skipped = repository.save_wxindex_daily_scores(
        name=word,
        scores=window_scores,
    )
    final_scores = filter_scores_in_ymd_window(
        repository.list_wxindex_word_scores(word),
        start_ymd=fetch_start_ymd,
        end_ymd=fetch_end_ymd,
    )
    if inserted > 0:
        action = "updated" if had_data else "inserted"
    elif final_scores:
        action = "cached"
    else:
        action = "api_empty"
    return final_scores or window_scores, action


def sync_words_from_trend_json(
    repository: HotContentRepository,
    api_client: JsonApiClient,
    api_url: str,
    *,
    trend_json: dict[str, Any],
    record_id: int,
    event_created_at: datetime | None = None,
    dry_run: bool = False,
    verbose: bool = False,
    update_meta_if_exists: bool = False,
) -> dict[str, int]:
    """将单条记录的 wxindex_trend_json 中检索词写入/刷新汇总表（近 7 日数据）。"""
    summary = {
        "words_found": 0,
        "inserted": 0,
        "updated": 0,
        "cached": 0,
        "legacy": 0,
        "expired": 0,
        "api_empty": 0,
        "below_threshold": 0,
        "fetch_failed": 0,
    }
    words = extract_searched_words(trend_json)
    summary["words_found"] = len(words)
    if not words:
        return summary

    for name in words:
        try:
            _, action = ensure_word_full_scores(
                repository,
                api_client,
                api_url,
                keyword=name,
                event_created_at=event_created_at,
                dry_run=dry_run,
                update_meta_if_exists=update_meta_if_exists,
            )
        except Exception as exc:
            summary["fetch_failed"] += 1
            if verbose:
                print(f"  fetch failed word={name}: {exc}")
            continue

        if action == "inserted":
            summary["inserted"] += 1
        elif action == "updated":
            summary["updated"] += 1
        elif action == "cached":
            summary["cached"] += 1
        elif action == "legacy":
            summary["legacy"] += 1
        elif action == "expired":
            summary["expired"] += 1
        elif action == "api_empty":
            summary["api_empty"] += 1
        elif action == "below_threshold":
            summary["below_threshold"] += 1
        elif action == "dry_run":
            summary["inserted"] += 1

        if verbose:
            print(f"  word={name} action={action}")

    return summary


def backfill_wxindex_words(
    repository: HotContentRepository,
    api_client: JsonApiClient,
    api_url: str,
    *,
    since_date: date = WXINDEX_WORDS_RECORD_SINCE,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, int]:
    """扫描 hot_content_records，汇总 6/11 起全部微信指数检索词（历史回填调 API）。"""
    summary = {
        "records_scanned": 0,
        "records_with_words": 0,
        "words_found": 0,
        "inserted": 0,
        "updated": 0,
        "cached": 0,
        "legacy": 0,
        "expired": 0,
        "api_empty": 0,
        "below_threshold": 0,
        "fetch_failed": 0,
        "invalid_json": 0,
    }

    since_dt = datetime.combine(since_date, datetime.min.time()).replace(tzinfo=SHANGHAI_TZ)
    records = repository.list_records_with_wxindex_trend(since_dt=since_dt)

    for row in records:
        summary["records_scanned"] += 1
        record_id = int(row["id"])
        try:
            trend_json = row.get("wxindex_trend_json")
            if not isinstance(trend_json, dict):
                summary["invalid_json"] += 1
                continue
        except (TypeError, ValueError):
            summary["invalid_json"] += 1
            continue

        words = extract_searched_words(trend_json)
        if not words:
            continue

        summary["records_with_words"] += 1
        if verbose:
            print(f"id={record_id} words={words}")

        result = sync_words_from_trend_json(
            repository,
            api_client,
            api_url,
            trend_json=trend_json,
            record_id=record_id,
            event_created_at=row.get("created_at"),
            dry_run=dry_run,
            verbose=verbose,
        )
        for key in (
            "words_found",
            "inserted",
            "updated",
            "cached",
            "legacy",
            "expired",
            "api_empty",
            "below_threshold",
            "fetch_failed",
        ):
            summary[key] += result[key]

    return summary


def build_word_event_map_from_records(
    records: list[dict[str, Any]],
) -> dict[str, datetime]:
    word_events: dict[str, datetime] = {}
    for row in records:
        created_at = row.get("created_at")
        if not isinstance(created_at, datetime):
            continue
        for word in extract_searched_words(row.get("wxindex_trend_json")):
            existing = word_events.get(word)
            if existing is None or created_at < existing:
                word_events[word] = created_at
    return word_events


def audit_wxindex_words_from_records(
    repository: HotContentRepository,
    *,
    after_created_at: datetime,
) -> dict[str, Any]:
    """检查指定时间后的热点记录，其微信指数词是否已在汇总表和 meta 表。"""
    records = repository.list_records_with_wxindex_trend_after(
        after_created_at=after_created_at,
    )
    word_events = build_word_event_map_from_records(records)
    missing_words: list[str] = []
    missing_meta: list[str] = []
    for word in sorted(word_events):
        if not repository.has_wxindex_word(word):
            missing_words.append(word)
        elif repository.get_wxindex_word_meta(word) is None:
            missing_meta.append(word)
    return {
        "after_created_at": after_created_at.isoformat(sep=" ", timespec="seconds"),
        "records_scanned": len(records),
        "words_found": len(word_events),
        "missing_words_count": len(missing_words),
        "missing_meta_count": len(missing_meta),
        "missing_words": missing_words,
        "missing_meta": missing_meta,
    }


def supplement_wxindex_words_from_records(
    repository: HotContentRepository,
    api_client: JsonApiClient,
    api_url: str,
    *,
    after_created_at: datetime,
    dry_run: bool = False,
    verbose: bool = False,
) -> dict[str, Any]:
    """补全指定时间后热点记录涉及、但缺失的 wxindex 词与 meta。"""
    audit = audit_wxindex_words_from_records(
        repository,
        after_created_at=after_created_at,
    )
    records = repository.list_records_with_wxindex_trend_after(
        after_created_at=after_created_at,
    )
    word_events = build_word_event_map_from_records(records)
    summary: dict[str, Any] = {
        "audit_before": {
            "records_scanned": audit["records_scanned"],
            "words_found": audit["words_found"],
            "missing_words_count": audit["missing_words_count"],
            "missing_meta_count": audit["missing_meta_count"],
        },
        "supplemented_words": 0,
        "inserted": 0,
        "updated": 0,
        "cached": 0,
        "meta_registered": 0,
        "api_empty": 0,
        "below_threshold": 0,
        "fetch_failed": 0,
    }

    for word, event_at in sorted(word_events.items()):
        had_meta = repository.get_wxindex_word_meta(word) is not None
        try:
            _, action = ensure_word_full_scores(
                repository,
                api_client,
                api_url,
                keyword=word,
                event_created_at=event_at,
                include_expired=True,
                dry_run=dry_run,
            )
        except Exception as exc:
            summary["fetch_failed"] += 1
            if verbose:
                print(f"fetch failed word={word}: {exc}")
            continue

        summary["supplemented_words"] += 1
        if action == "inserted":
            summary["inserted"] += 1
        elif action == "updated":
            summary["updated"] += 1
        elif action == "cached":
            summary["cached"] += 1
        elif action == "api_empty":
            summary["api_empty"] += 1
        elif action == "below_threshold":
            summary["below_threshold"] += 1
        elif action == "dry_run":
            summary["inserted"] += 1

        if not had_meta:
            if dry_run or repository.get_wxindex_word_meta(word) is not None:
                summary["meta_registered"] += 1

        if verbose:
            print(f"word={word} event_at={event_at} action={action}")

    audit_after = audit_wxindex_words_from_records(
        repository,
        after_created_at=after_created_at,
    )
    summary["audit_after"] = {
        "missing_words_count": audit_after["missing_words_count"],
        "missing_meta_count": audit_after["missing_meta_count"],
        "missing_words": audit_after["missing_words"],
        "missing_meta": audit_after["missing_meta"],
    }
    return summary