"""股票集合 CRUD 路由"""

from fastapi import APIRouter, HTTPException
from pydantic import BaseModel
from typing import Optional
from database import get_connection, dict_from_row

router = APIRouter()


class CollectionCreate(BaseModel):
    name: str
    description: Optional[str] = None
    user_id: str


class CollectionUpdate(BaseModel):
    name: Optional[str] = None
    description: Optional[str] = None
    user_id: Optional[str] = None
    last_accessed_at: Optional[str] = None


class StockAdd(BaseModel):
    stock_code: str
    stock_name: str
    added_price: Optional[float] = None


@router.get("", summary="列表集合")
async def list_collections(user_id: str = ""):
    conn = get_connection()
    try:
        rows = conn.execute(
            "SELECT * FROM stock_collections WHERE user_id = ? OR user_id = '' ORDER BY created_at DESC",
            (user_id,),
        ).fetchall()
        collections = [dict_from_row(r) for r in rows]

        # 更新空 user_id 的记录
        for c in collections:
            if not c["user_id"]:
                conn.execute("UPDATE stock_collections SET user_id = ? WHERE id = ?", (user_id, c["id"]))
        conn.commit()
        return collections
    finally:
        conn.close()


@router.post("", summary="创建集合", status_code=201)
async def create_collection(body: CollectionCreate):
    from datetime import datetime
    now = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    conn = get_connection()
    try:
        cur = conn.execute(
            "INSERT INTO stock_collections (name, description, user_id, last_accessed_at, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?)",
            (body.name, body.description, body.user_id, now, now, now),
        )
        conn.commit()
        row = conn.execute("SELECT * FROM stock_collections WHERE id = ?", (cur.lastrowid,)).fetchone()
        return dict_from_row(row)
    finally:
        conn.close()


@router.get("/{collection_id}", summary="获取集合详情")
async def get_collection(collection_id: int):
    conn = get_connection()
    try:
        row = conn.execute("SELECT * FROM stock_collections WHERE id = ?", (collection_id,)).fetchone()
        if not row:
            raise HTTPException(status_code=404, detail="集合不存在")
        return dict_from_row(row)
    finally:
        conn.close()


@router.patch("/{collection_id}", summary="更新集合")
async def update_collection(collection_id: int, body: CollectionUpdate):
    conn = get_connection()
    try:
        existing = conn.execute("SELECT * FROM stock_collections WHERE id = ?", (collection_id,)).fetchone()
        if not existing:
            raise HTTPException(status_code=404, detail="集合不存在")

        updates = {}
        if body.name is not None:
            updates["name"] = body.name
        if body.description is not None:
            updates["description"] = body.description
        if body.user_id is not None:
            updates["user_id"] = body.user_id
        if body.last_accessed_at is not None:
            updates["last_accessed_at"] = body.last_accessed_at

        if updates:
            from datetime import datetime
            updates["updated_at"] = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
            set_clause = ", ".join(f"{k} = ?" for k in updates)
            values = list(updates.values())
            values.append(collection_id)
            conn.execute(f"UPDATE stock_collections SET {set_clause} WHERE id = ?", values)
            conn.commit()

        row = conn.execute("SELECT * FROM stock_collections WHERE id = ?", (collection_id,)).fetchone()
        return dict_from_row(row)
    finally:
        conn.close()


@router.delete("/{collection_id}", summary="删除集合")
async def delete_collection(collection_id: int):
    conn = get_connection()
    try:
        existing = conn.execute("SELECT * FROM stock_collections WHERE id = ?", (collection_id,)).fetchone()
        if not existing:
            raise HTTPException(status_code=404, detail="集合不存在")
        conn.execute("DELETE FROM stock_collections WHERE id = ?", (collection_id,))
        conn.commit()
        return {"success": True}
    finally:
        conn.close()


@router.get("/{collection_id}/stocks", summary="列表集合中的股票")
async def list_stocks(collection_id: int):
    conn = get_connection()
    try:
        rows = conn.execute(
            "SELECT * FROM collection_stocks WHERE collection_id = ? ORDER BY added_at DESC",
            (collection_id,),
        ).fetchall()
        return [dict_from_row(r) for r in rows]
    finally:
        conn.close()


@router.post("/{collection_id}/stocks", summary="添加股票到集合", status_code=201)
async def add_stock(collection_id: int, body: StockAdd):
    conn = get_connection()
    try:
        # 检查集合存在
        coll = conn.execute("SELECT id FROM stock_collections WHERE id = ?", (collection_id,)).fetchone()
        if not coll:
            raise HTTPException(status_code=404, detail="集合不存在")

        try:
            cur = conn.execute(
                "INSERT INTO collection_stocks (collection_id, stock_code, stock_name, added_price) VALUES (?, ?, ?, ?)",
                (collection_id, body.stock_code, body.stock_name, body.added_price),
            )
            conn.commit()
            row = conn.execute("SELECT * FROM collection_stocks WHERE id = ?", (cur.lastrowid,)).fetchone()
            return dict_from_row(row)
        except Exception as e:
            if "UNIQUE constraint failed" in str(e):
                raise HTTPException(status_code=409, detail="该股票已在集合中")
            raise
    finally:
        conn.close()


@router.get("/stock/{stock_code}", summary="在所有集合中查找股票记录")
async def find_stock(stock_code: str):
    conn = get_connection()
    try:
        row = conn.execute(
            "SELECT * FROM collection_stocks WHERE stock_code = ? ORDER BY added_at DESC LIMIT 1",
            (stock_code,),
        ).fetchone()
        if not row:
            return None
        return dict_from_row(row)
    finally:
        conn.close()


@router.delete("/{collection_id}/stocks/{stock_code}", summary="从集合移除股票")
async def remove_stock(collection_id: int, stock_code: str):
    conn = get_connection()
    try:
        conn.execute(
            "DELETE FROM collection_stocks WHERE collection_id = ? AND stock_code = ?",
            (collection_id, stock_code),
        )
        conn.commit()
        return {"success": True}
    finally:
        conn.close()