"""通知（お知らせ）路由：从 Redis 读取 worker 抓取的账号通知。

worker（pruchase_jhw）定时抓取骏河屋 action_news 页面，把每条通知按 data_id
作为 field 写入 Redis Hash（key 见 redis_keys.news_hash）。本路由读取该 Hash，
按 data_id 倒序（新→旧）返回，只读不删除。Redis 读取沿用 session_store 复用的连接，
与 scrape 路由保持一致。
"""
from __future__ import annotations

import json
import logging
from typing import Any

from fastapi import APIRouter, Depends, Query

from app.api.dependencies import get_container, require_bearer_token
from app.core.container import ServiceContainer
from app.models.scrape import ApiResponse, NewsItemData
from surugaya_common import redis_keys

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api", tags=["news"])


def _news_sort_key(item: dict[str, Any]) -> tuple[int, int]:
    """排序键：优先按 data_id 数值倒序，非数值退化到最小，保证排序稳定。"""
    raw = str(item.get("data_id", "")).strip()
    if raw.isdigit():
        return (1, int(raw))
    return (0, 0)


@router.get(
    "/news",
    response_model=ApiResponse[list[NewsItemData]],
    dependencies=[Depends(require_bearer_token)],
)
async def list_news(
        limit: int | None = Query(default=None, ge=1, le=500, description="返回条数上限，省略则返回全部"),
        container: ServiceContainer = Depends(get_container),
) -> ApiResponse[list[NewsItemData]]:
    """读取通知列表（按 data_id 倒序，新→旧），只读不删除。"""
    if container.session_store._redis is None:
        return ApiResponse[list[NewsItemData]](
            success=False,
            msg="Redis 未配置",
            data=None,
            code=500,
        )

    # dev/prod 由本服务 app_env 推导，需与 worker 写入端（APP_ENV）保持一致。
    is_dev = "1" if container.settings.app_env == "dev" else "0"
    raw_map = await container.session_store._redis.hgetall(redis_keys.news_hash(is_dev))

    items: list[dict[str, Any]] = []
    for data_id, raw_value in raw_map.items():
        try:
            items.append(json.loads(raw_value))
        except (json.JSONDecodeError, TypeError):
            logger.warning("通知 data_id=%s 的 JSON 解析失败，已跳过。", data_id)

    items.sort(key=_news_sort_key, reverse=True)
    if limit is not None and limit > 0:
        items = items[:limit]

    return ApiResponse[list[NewsItemData]](
        success=True,
        msg="success",
        data=[NewsItemData(**item) for item in items],
        code=0,
    )