"""市场补充数据源（供 AI 分析与看板扩展）

- fetch_news: 新浪财经 7x24 快讯
- fetch_sector_fund_flow: 东方财富板块主力资金流排行（行业/概念）
- fetch_margin_summary: 东方财富两融余额汇总（T+1 数据）

均为公开接口，失败时返回 []/None，不阻塞主流程。
"""

import asyncio

import httpx

_TIMEOUT = 10.0
_UA = ("Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 "
       "(KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36")


async def fetch_news(limit: int = 30) -> list[dict]:
    """新浪财经 7x24 快讯，返回 [{time: 'MM-DD HH:MM', content}]；失败返回 []"""
    try:
        limit = max(1, min(int(limit or 30), 50))
    except (TypeError, ValueError):
        limit = 30
    try:
        async with httpx.AsyncClient(timeout=_TIMEOUT, headers={"User-Agent": _UA}) as client:
            resp = await client.get(
                "https://zhibo.sina.com.cn/api/zhibo/feed",
                params={"page": 1, "page_size": limit, "zhibo_id": 152, "tag_id": 0},
            )
            resp.raise_for_status()
            items = resp.json()["result"]["data"]["feed"]["list"]
        news = []
        for it in items or []:
            text = (it.get("rich_text") or "").strip()
            if not text:
                continue
            news.append({
                "time": (it.get("create_time") or "")[5:16],  # 'MM-DD HH:MM'
                "content": text[:300],
            })
        return news
    except Exception:
        return []


_FLOW_HOSTS = (
    # push2 对部分客户端有 TLS 指纹拦截（peer closed），delay 镜像同接口且稳定
    "https://push2delay.eastmoney.com",
    "https://push2.eastmoney.com",
)


async def _fetch_flow_boards(client: httpx.AsyncClient, fs: str, po: int, pz: int) -> list[dict]:
    """拉取一类板块的主力净流入排行。po=1 降序（净流入最多），po=0 升序（净流出最多）

    查询串保持字面量 + 号（与东财网页请求一致），逐 host 尝试。
    """
    qs = (f"/api/qt/clist/get?fid=f62&po={po}&pz={pz}&pn=1&np=1"
          f"&fltt=2&invt=2&fs={fs}&fields=f12,f14,f62,f184")
    last_err: Exception | None = None
    for host in _FLOW_HOSTS:
        try:
            resp = await client.get(host + qs)
            resp.raise_for_status()
            diff = (resp.json().get("data") or {}).get("diff") or []
            break
        except Exception as e:
            last_err = e
            diff = []
    else:
        raise ConnectionError(f"板块资金流全部数据源失败: {last_err}")
    if isinstance(diff, dict):  # 兼容旧版 {index: item} 结构
        diff = list(diff.values())
    boards = []
    for d in diff:
        amt = d.get("f62")
        if not isinstance(amt, (int, float)):
            continue
        boards.append({
            "code": d.get("f12", ""),
            "name": d.get("f14", ""),
            "mainNet": round(amt / 1e8, 1),  # 亿元
            "mainNetPct": d.get("f184"),     # 主力净占比 %
        })
    return boards


async def fetch_sector_fund_flow() -> dict | None:
    """板块主力资金流排行：行业净流入/净流出 TOP6 + 概念净流入 TOP6；失败返回 None"""
    try:
        async with httpx.AsyncClient(timeout=_TIMEOUT, headers={"User-Agent": _UA}) as client:
            industry_in, industry_out, concept_in = await asyncio.gather(
                _fetch_flow_boards(client, "m:90+t:2", 1, 6),
                _fetch_flow_boards(client, "m:90+t:2", 0, 6),
                _fetch_flow_boards(client, "m:90+t:3", 1, 6),
            )
        return {
            "industryInflow": industry_in,    # 主力净流入降序
            "industryOutflow": industry_out,  # 升序（净流出最多在前）
            "conceptInflow": concept_in,
            "unit": "亿元",
        }
    except Exception:
        return None


async def fetch_margin_summary() -> dict | None:
    """沪深北两融余额汇总（交易所 T+1 披露）；失败返回 None"""
    try:
        async with httpx.AsyncClient(timeout=_TIMEOUT, headers={"User-Agent": _UA}) as client:
            resp = await client.get(
                "https://datacenter-web.eastmoney.com/api/data/v1/get",
                params={
                    "reportName": "RPTA_RZRQ_LSHJ",
                    "columns": "ALL",
                    "source": "WEB",
                    "sortColumns": "dim_date",
                    "sortTypes": "-1",
                    "pageSize": 2,
                    "pageNumber": 1,
                },
            )
            resp.raise_for_status()
            rows = ((resp.json().get("result") or {}).get("data")) or []
        if not rows:
            return None

        def _balance(row: dict) -> float:
            return float(row.get("RZYE") or 0) + float(row.get("RQYE") or 0)

        latest = rows[0]
        prev = rows[1] if len(rows) > 1 else None
        balance = _balance(latest)
        change = (balance - _balance(prev)) if prev else None
        return {
            "date": (latest.get("DIM_DATE") or "")[:10],
            "balanceYi": round(balance / 1e8),  # 亿元
            "changeYi": round(change / 1e8) if change is not None else None,
            "rzjmeYi": round(float(latest.get("RZJME") or 0) / 1e8, 1),  # 融资净买入
        }
    except Exception:
        return None