"""看板 API：每天同步情况 / 任务历史 / 数据集统计。

复用 db_ops.list_sync_history() + daily_sync_summary()。
"""
from __future__ import annotations

from datetime import date

from fastapi import APIRouter, Query

from app.core.db import ops as db_ops

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


@router.get("/daily")
def daily_summary(days: int = Query(7, ge=1, le=90)):
    """按日期聚合的同步状态计数（看板首页用）。"""
    return {"days": days, "summary": db_ops.daily_sync_summary(days=days)}


@router.get("/history")
def sync_history(
    dataset_id: str | None = Query(None),
    days: int = Query(7, ge=1, le=90),
    limit: int = Query(200, ge=1, le=1000),
    run_date: str | None = Query(None, description="YYYY-MM-DD 过滤某天"),
):
    """同步历史记录（每次 run 一行，append-only）。"""
    rd = None
    if run_date:
        try:
            rd = date.fromisoformat(run_date)
        except ValueError:
            return {"error": f"run_date must be YYYY-MM-DD, got {run_date!r}"}
    rows = db_ops.list_sync_history(
        dataset_id=dataset_id, run_date=rd, days=days, limit=limit,
    )
    return {"dataset_id": dataset_id, "days": days, "count": len(rows), "history": rows}


@router.get("/today")
def today_summary():
    """今天的同步情况（看板头部卡片用）。"""
    rows = db_ops.daily_sync_summary(days=1)
    today_str = date.today().isoformat()
    today = next((r for r in rows if r["date"] == today_str), None) or {
        "date": today_str, "ok": 0, "warning": 0, "error": 0, "blocked": 0,
        "total": 0, "tasks_run": 0,
    }
    # 列出今天每个 task 的最新状态
    history = db_ops.list_sync_history(days=1, limit=500)
    return {"summary": today, "tasks": history}


@router.get("/datasets")
def dataset_overview():
    """所有 dataset 的当前状态 + 最近一次 run。

    合并 dataset_registry（当前状态）+ sync_history（最近一次历史）。
    """
    from app.core.sync import get_registry_status
    registry = get_registry_status()
    history = db_ops.list_sync_history(days=7, limit=500)
    last_by_task: dict[str, dict] = {}
    for h in history:
        if h["dataset_id"] not in last_by_task:
            last_by_task[h["dataset_id"]] = h
    enriched = []
    for r in registry:
        ds_id = r["dataset_id"]
        last = last_by_task.get(ds_id)
        enriched.append({
            **r,
            "last_run": last,
            "history_count_7d": sum(1 for h in history if h["dataset_id"] == ds_id),
        })
    return {"count": len(enriched), "datasets": enriched}


@router.get("/stats")
def data_stats():
    """数据集的数据范围/数据量（用于看板"数据规模"卡片）。"""
    from sqlalchemy import func, select
    from app.core.db.models import (
        KlineStock, KlineIndex, Kline5Min, Moneyflow, Share, TickTrade,
        SectorIndices, SectorFeaturesDaily, MarketRegimeDaily,
        LonghubangDaily, LonghubangSeat, Stocks, Industry,
        NodeCategory, Node, StockNodeMap, KlineStockMADaily,
    )
    from app.core.db.orm import SessionLocal

    targets = [
        ("stocks", Stocks),
        ("kline_stock", KlineStock),
        ("kline_index", KlineIndex),
        ("kline_5min", Kline5Min),
        ("kline_stock_ma_daily", KlineStockMADaily),
        ("moneyflow", Moneyflow),
        ("share", Share),
        ("tick_trade", TickTrade),
        ("sector_indices", SectorIndices),
        ("sector_features_daily", SectorFeaturesDaily),
        ("market_regime_daily", MarketRegimeDaily),
        ("longhubang_daily", LonghubangDaily),
        ("longhubang_seat", LonghubangSeat),
        ("industry", Industry),
        ("node_categories", NodeCategory),
        ("nodes", Node),
        ("stock_node_map", StockNodeMap),
    ]
    out = []
    with SessionLocal() as s:
        for name, model in targets:
            try:
                count = s.execute(select(func.count()).select_from(model)).scalar() or 0
                # 尝试拿最早/最新 trade_date
                date_range = None
                if hasattr(model, "trade_date"):
                    mn = s.execute(select(func.min(model.trade_date))).scalar()
                    mx = s.execute(select(func.max(model.trade_date))).scalar()
                    date_range = {"min": str(mn), "max": str(mx)} if mn else None
                out.append({"table": name, "rows": int(count), "date_range": date_range})
            except Exception as e:
                out.append({"table": name, "rows": -1, "error": str(e)[:100]})
    return {"tables": out}


@router.get("/")
def dashboard_index():
    """看板 HTML 入口（前端单文件 SPA）。"""
    from fastapi.responses import FileResponse, RedirectResponse
    return RedirectResponse(url="/static/dashboard.html")