"""实盘模拟 API 路由（spec §live-api）。

create 建 live_account(持久化配置,status=stopped);start/stop 改 status 字段;
GET 查询持仓/成交/账户/状态。runner(supervisor) 是独立常驻进程,轮询 status 字段
决定起停 LiveTradingEngine;两者只通过 DB 通信,本模块不实例化 engine。

风格参考 ``sanguo_api/routes_paper.py``。
"""
from __future__ import annotations

import os

from fastapi import APIRouter, Depends, Header, HTTPException
from pydantic import BaseModel

from .auth import verify_token as verify_token_impl

router = APIRouter()
_db_path = {"path": None}

# miniQMT 默认 userdata_mini 路径(国金QMT交易端模拟);
# req.mini_path 空 → env SANGUO_QMT_PATH → 此默认(双保险,避免 connect=-1)
_DEFAULT_MINI_PATH = r"C:\国金QMT交易端模拟\userdata_mini"


def set_db_path(p):
    _db_path["path"] = p
    if p:
        from sanguo_live.persistence import init_db
        init_db(p)  # app 启动建表(幂等)


async def verify_token(authorization: str | None = Header(None)):
    if authorization is None or not authorization.startswith("Bearer "):
        raise HTTPException(401, "Missing/invalid authorization")
    return verify_token_impl(authorization.split(" ", 1)[1])


class LiveCreateRequest(BaseModel):
    name: str = "live"
    account: str
    vt_symbol: str = "600000.SSE"
    strategy_class: str = "AShareDoubleMaStrategy"
    strategy_name: str
    setting: dict = {}
    interval: str = "15m"
    initial_capital: float = 1_000_000
    connect_wait_sec: int = 10
    init_wait_sec: int = 60
    mini_path: str = ""


@router.post("/live/create", dependencies=[Depends(verify_token)])
def create_live(req: LiveCreateRequest):
    """创建实盘实例(写 live_accounts,status=stopped)。需调 start 才会启动。"""
    from sanguo_live.persistence import init_db, save_account

    db = _db_path["path"] or ":memory:"
    init_db(db)
    payload = req.model_dump()
    # mini_path 兜底:req → env SANGUO_QMT_PATH → 内置默认(空值会导致 connect=-1)
    if not payload.get("mini_path"):
        payload["mini_path"] = (
            os.environ.get("SANGUO_QMT_PATH") or _DEFAULT_MINI_PATH
        )
    aid = save_account(db, {**payload, "status": "stopped"})
    return {"account_id": aid, "status": "stopped"}


@router.get("/live", dependencies=[Depends(verify_token)])
def list_lives():
    """实盘实例列表。每行带最新账户快照摘要(total/收益率)。

    收益率用首快照基线:(last_total - first_total) / first_total,
    避免用 initial_capital 兜底导致入金/出金瞬间收益率失真。
    无快照时 total_return=None(不兜底 initial_capital)。
    """
    from sanguo_live.persistence import (
        list_accounts, get_last_balance, get_first_balance, load_positions,
    )

    db = _db_path["path"]
    if not db:
        return {"accounts": []}
    items = list_accounts(db)
    for item in items:
        last = get_last_balance(db, item["id"])
        first = get_first_balance(db, item["id"])
        if last:
            item["latest_equity"] = last.get("total")
            item["latest_date"] = last.get("date")
        else:
            item["latest_equity"] = None
            item["latest_date"] = None
        # 收益率:首快照 total 为 baseline;last/first 同条时为 0
        baseline = (first or {}).get("total") if first else None
        if last and baseline:
            item["total_return"] = (last.get("total", 0) - baseline) / baseline
        else:
            item["total_return"] = None
        item["position_count"] = len(load_positions(db, item["id"]))
    return {"accounts": items}


@router.get("/live/{aid}", dependencies=[Depends(verify_token)])
def get_live(aid: int):
    from sanguo_live.persistence import get_account

    acc = get_account(_db_path["path"], aid)
    if not acc:
        raise HTTPException(404, "account not found")
    return acc


@router.post("/live/{aid}/start", dependencies=[Depends(verify_token)])
def start_live(aid: int):
    """启动实例(status=running)。supervisor 轮询发现后起 engine。"""
    from sanguo_live.persistence import get_account, update_account_status

    acc = get_account(_db_path["path"], aid)
    if not acc:
        raise HTTPException(404, "account not found")
    if not acc["account"]:
        raise HTTPException(400, "account 字段(交易账号)不能为空")
    update_account_status(_db_path["path"], aid, "running")
    return {"account_id": aid, "status": "running"}


@router.post("/live/{aid}/stop", dependencies=[Depends(verify_token)])
def stop_live(aid: int):
    """停止实例(status=stopped)。supervisor 轮询发现后停 engine。"""
    from sanguo_live.persistence import get_account, update_account_status

    if not get_account(_db_path["path"], aid):
        raise HTTPException(404, "account not found")
    update_account_status(_db_path["path"], aid, "stopped")
    return {"account_id": aid, "status": "stopped"}


@router.get("/live/{aid}/positions", dependencies=[Depends(verify_token)])
def get_positions(aid: int):
    """持仓快照(读 live_positions,supervisor 定时落库)。"""
    from sanguo_live.persistence import load_positions

    return load_positions(_db_path["path"], aid)


@router.get("/live/{aid}/trades", dependencies=[Depends(verify_token)])
def get_trades(aid: int):
    """成交明细(读 live_trades,supervisor 事件回调落库)。"""
    from sanguo_live.persistence import list_trades

    return list_trades(_db_path["path"], aid)


@router.get("/live/{aid}/account", dependencies=[Depends(verify_token)])
def get_account_balance(aid: int):
    """账户最新快照(读 live_balance 最新一条)。"""
    from sanguo_live.persistence import get_last_balance

    last = get_last_balance(_db_path["path"], aid)
    return last or {}


@router.get("/live/{aid}/status", dependencies=[Depends(verify_token)])
def get_status(aid: int):
    """运行状态(读 live_accounts.status)。"""
    from sanguo_live.persistence import get_account

    acc = get_account(_db_path["path"], aid)
    if not acc:
        raise HTTPException(404, "account not found")
    return {
        "account_id": aid, "status": acc["status"], "name": acc["name"],
        "account": acc["account"], "vt_symbol": acc["vt_symbol"],
        "strategy_name": acc["strategy_name"], "updated_at": acc["updated_at"],
        "error_msg": acc.get("error_msg", ""),
    }