"""bzzoiro standings 管线:联赛积分榜快照(/leagues/{id}/standings/)→ standings 表。

从 bzzoiro.py 拆出。同一联赛同一赛季只保留最新快照(按 (league, season, team)
upsert);球队名与 events 管线使用同一 normalize 规则,保证 Team 匹配。

可替换协作者(抓取函数 / Bronze 写入助手)在运行期经聚合门面
src.data.bzzoiro 解析 —— 与拆分前的单文件 monkeypatch 语义一致。
"""
from __future__ import annotations

import logging
from collections.abc import Iterable
from datetime import datetime, timezone

from sqlalchemy import select

from src.data.bzzoiro_common import _to_float_or_none, _to_int_or_none
from src.data.config import BZZOIRO_LEAGUE_IDS, LEAGUE_COUNTRIES, LEAGUE_NAMES
from src.data.pipeline_write import _safe_write_ingest_failure, _write_lineage, _write_raw_event
from src.data.team_names_zh import zh_name
from src.db.models import Standing, Team
from src.db.repositories import LeagueRepository, TeamRepository

logger = logging.getLogger(__name__)


async def fetch_bzzoiro_standings(league_code: str, season: str | None = None) -> dict:
    """抓取联赛积分榜(纯抓取,不入库)。season 为 None 时取当前赛季。"""
    from src.data import bzzoiro as bz

    league_id = BZZOIRO_LEAGUE_IDS.get(league_code)
    if league_id is None:
        raise ValueError(f"未知联赛代码: {league_code}")
    params: dict = {}
    if season:
        params["season"] = season

    return await bz._fetch_json_async(f"/leagues/{league_id}/standings/", params)


def _season_label_from_dates(start_date, end_date) -> str:
    """从赛季起止日期推导赛季标签(与 derive_season_label 语义一致)。"""
    try:
        if isinstance(start_date, str):
            start = datetime.fromisoformat(start_date[:10])
        else:
            start = start_date
        if start is None:
            return "?"
        y = start.year
        return f"{y}-{y + 1}" if start.month >= 8 else f"{y - 1}-{y}"
    except (TypeError, ValueError):
        return "?"


async def ingest_bzzoiro_standings(db, *, leagues: Iterable[str], season: str | None = None) -> dict:
    """采集积分榜 → upsert standings 表。

    season 为 None 时采集当前赛季(bzzoiro 默认返回 is_current 赛季)。
    球队名与 events 管线使用同一 normalize 规则,保证 Team 匹配。
    """
    from src.data.team_names import normalize as normalize_name

    from src.data import bzzoiro as bz

    result: dict = {"leagues": {}, "total_upserted": 0, "errors": []}
    for code in leagues:
        league_r: dict = {"upserted": 0, "teams_created": 0, "rows": 0, "errors": []}
        try:
            payload = await bz.fetch_bzzoiro_standings(code, season=season)
        except Exception as e:
            logger.exception("bzzoiro standings fetch failed for %s", code)
            league_r["errors"].append(str(e))
            await _safe_write_ingest_failure(
                db,
                entity_type="standings",
                source_record_id=None,
                error=e,
                raw_payload={"league": code, "season": season},
            )
            result["leagues"][code] = league_r
            result["errors"].append(f"{code}: {e}")
            continue

        rows = payload.get("standings") or []
        if not rows:
            result["leagues"][code] = {"error": "无积分榜数据(赛季未开始或未提供)"}
            result["errors"].append(f"{code}: 无积分榜数据")
            continue

        # 联赛(get-or-create,D4: 经 LeagueRepository)
        league = await LeagueRepository(db).get_or_create(
            code, LEAGUE_NAMES.get(code, code), LEAGUE_COUNTRIES.get(code)
        )
        team_r = TeamRepository(db)

        # 赛季标签:优先用返回的 season 对象推导
        season_obj = payload.get("season") or {}
        season_label = _season_label_from_dates(
            season_obj.get("start_date"), season_obj.get("end_date")
        )
        if season_label == "?":
            season_label = season or ""

        # 批量预载球队(与 events 管线使用同一 normalize 规则,保证 Team 匹配)
        names = {normalize_name(str(r.get("team_name", ""))) for r in rows}
        names.discard("")
        team_map: dict[str, Team] = await team_r.get_all_by_names(list(names))

        now = datetime.now(timezone.utc)
        for r in rows:
            team_name = normalize_name(str(r.get("team_name", "")))
            if not team_name:
                continue
            team = team_map.get(team_name)
            if team is None:
                team = await team_r.get_or_create(team_name, name_zh=zh_name(team_name))
                team_map[team_name] = team
                league_r["teams_created"] += 1

            zone = r.get("zone") or {}
            values = dict(
                position=_to_int_or_none(r.get("position")) or 0,
                played=_to_int_or_none(r.get("played")) or 0,
                won=_to_int_or_none(r.get("won")) or 0,
                drawn=_to_int_or_none(r.get("drawn")) or 0,
                lost=_to_int_or_none(r.get("lost")) or 0,
                goals_for=_to_int_or_none(r.get("gf")) or 0,
                goals_against=_to_int_or_none(r.get("ga")) or 0,
                goal_diff=_to_int_or_none(r.get("gd")) or 0,
                points=_to_int_or_none(r.get("pts")) or 0,
                xg_for=_to_float_or_none(r.get("xgf")),
                xg_against=_to_float_or_none(r.get("xga")),
                form=r.get("form") or None,
                zone=zone.get("label") or zone.get("key") or None,
                updated_at=now,
                retrieved_at=now,
            )

            # P0-02: 追加快照——每次采集 INSERT 新行(available_at=now),
            # ON CONFLICT (league, season, team, available_at) DO NOTHING。
            standing = Standing(
                league_id=league.id, season=season_label, team_id=team.id, available_at=now, **values
            )
            db.add(standing)
            league_r["upserted"] += 1

        league_r["rows"] = len(rows)

        # D1(对称 events/stats 管线): 联赛成功 upsert → 补写 Bronze 层。
        # 幂等键 standings:{league}:{season}:积分榜是联赛级快照,一次成功
        # 采集写一条 RawEvent(整份原始载荷)+ 一条血缘。season 用实际入库的
        # 标签(由载荷推导,与 Standing.season 同口径),不依赖调用方传参,
        # 保证不同调用方(season=None 或显式传参)对同一赛季命中同一条 RawEvent。
        if league_r["upserted"] > 0:
            bronze_batch_id = f"bzzoiro-standings-{code}-{now:%Y%m%d%H%M%S}"
            await _write_standings_bronze(
                db,
                source_record_id=f"standings:{code}:{season_label}",
                raw_payload=payload,
                league_id=league.id,
                league_code=code,
                season_label=season_label,
                rows_upserted=league_r["upserted"],
                batch_id=bronze_batch_id,
            )

        result["leagues"][code] = league_r
        result["total_upserted"] += league_r["upserted"]
        logger.info(
            "bzzoiro standings 采集完成: %s 赛季 %s, upsert %d/%d",
            code, season_label, league_r["upserted"], league_r["rows"],
        )
    return result


async def _write_standings_bronze(
    db,
    *,
    source_record_id: str,
    raw_payload: dict,
    league_id: int | None,
    league_code: str,
    season_label: str,
    rows_upserted: int,
    batch_id: str,
) -> None:
    """standings 成功 upsert 一个联赛后的 Bronze 层补写:RawEvent(幂等) + DataLineage。

    与 _write_events_bronze 同级约束:幂等性由 _write_raw_event 的
    source_record_id 查重保证(积分榜是联赛级快照,同联赛同赛季重复采集
    命中同一条 RawEvent);best-effort:基础设施写入失败只记 warning,
    绝不拖垮采集主流程。
    """
    try:
        await _write_raw_event(db, "bzzoiro", source_record_id, raw_payload, batch_id)
        await _write_lineage(
            db, "bzzoiro", source_record_id,
            "standings", league_id, "standings_ingest",
            {"league": league_code, "season": season_label, "rows_upserted": rows_upserted},
            batch_id,
        )
    except Exception:
        logger.warning(
            "standings Bronze 写入失败(record=%s, league=%s),不影响采集主流程",
            source_record_id, league_code, exc_info=True,
        )