"""IBKR tool functions: Pydantic schemas + async dispatch to client/ws."""
from __future__ import annotations

import asyncio
from typing import Any

from pydantic import BaseModel

from cerbero_mcp.exchanges.ibkr.client import _SEC_TYPE_MAP, IBKRClient, IBKRError
from cerbero_mcp.exchanges.ibkr.leverage_cap import enforce_leverage, get_max_leverage  # noqa: F401
from cerbero_mcp.exchanges.ibkr.ws import IBKRWebSocket

# === Schemas: reads ===

class GetAccountReq(BaseModel):
    pass

class GetPositionsReq(BaseModel):
    pass

class GetOpenOrdersReq(BaseModel):
    pass

class GetActivitiesReq(BaseModel):
    days: int = 7

class GetTickerReq(BaseModel):
    symbol: str
    asset_class: str = "stocks"

class GetBarsReq(BaseModel):
    symbol: str
    asset_class: str = "stocks"
    period: str = "1d"
    bar: str = "5min"

class GetSnapshotReq(BaseModel):
    symbol: str
    asset_class: str = "stocks"

class GetOptionChainReq(BaseModel):
    underlying: str
    expiry: str | None = None

class SearchContractsReq(BaseModel):
    symbol: str
    sec_type: str = "STK"

class GetClockReq(BaseModel):
    pass

# === Schemas: streaming ===

class GetTickReq(BaseModel):
    symbol: str
    asset_class: str = "stocks"

class GetDepthReq(BaseModel):
    symbol: str
    asset_class: str = "stocks"
    rows: int = 5
    exchange: str = "SMART"

class SubscribeTickReq(BaseModel):
    symbol: str
    asset_class: str = "stocks"

class UnsubscribeReq(BaseModel):
    symbol: str
    asset_class: str = "stocks"

# === Schemas: writes simple ===

class PlaceOrderReq(BaseModel):
    symbol: str
    side: str
    qty: float
    order_type: str = "market"
    limit_price: float | None = None
    stop_price: float | None = None
    tif: str = "day"
    asset_class: str = "stocks"
    sec_type: str | None = None
    exchange: str = "SMART"
    outside_rth: bool = False

class AmendOrderReq(BaseModel):
    order_id: str
    qty: float | None = None
    limit_price: float | None = None
    stop_price: float | None = None
    tif: str | None = None

class CancelOrderReq(BaseModel):
    order_id: str

class CancelAllOrdersReq(BaseModel):
    pass

class ClosePositionReq(BaseModel):
    symbol: str
    qty: float | None = None

class CloseAllPositionsReq(BaseModel):
    pass

# === Schemas: writes complex ===

class PlaceBracketOrderReq(BaseModel):
    symbol: str
    side: str
    qty: float
    entry_price: float
    stop_loss: float
    take_profit: float
    tif: str = "gtc"
    asset_class: str = "stocks"
    exchange: str = "SMART"

class OrderLeg(BaseModel):
    symbol: str
    side: str
    qty: float
    order_type: str = "limit"
    limit_price: float | None = None
    stop_price: float | None = None
    tif: str = "gtc"
    asset_class: str = "stocks"

class PlaceOcoOrderReq(BaseModel):
    legs: list[OrderLeg]

class PlaceOtoOrderReq(BaseModel):
    trigger: OrderLeg
    child: OrderLeg

# === Read tools ===

async def environment_info(
    client: IBKRClient, *, creds: dict, env_info: Any | None = None
) -> dict:
    return {
        "exchange": "ibkr",
        "environment": "testnet" if client.paper else "mainnet",
        "paper": client.paper,
        "base_url": client.base_url,
        "max_leverage": get_max_leverage(creds),
    }

async def get_account(client: IBKRClient, params: GetAccountReq) -> dict:
    return await client.get_account()

async def get_positions(client: IBKRClient, params: GetPositionsReq) -> dict:
    return {"positions": await client.get_positions()}

async def get_open_orders(client: IBKRClient, params: GetOpenOrdersReq) -> dict:
    return {"orders": await client.get_open_orders()}

async def get_activities(client: IBKRClient, params: GetActivitiesReq) -> dict:
    return {"activities": await client.get_activities(params.days)}

async def get_ticker(client: IBKRClient, params: GetTickerReq) -> dict:
    return await client.get_ticker(params.symbol, params.asset_class)

async def get_bars(client: IBKRClient, params: GetBarsReq) -> dict:
    return await client.get_bars(
        params.symbol, params.asset_class, params.period, params.bar,
    )

async def get_snapshot(client: IBKRClient, params: GetSnapshotReq) -> dict:
    return await client.get_ticker(params.symbol, params.asset_class)

async def get_option_chain(client: IBKRClient, params: GetOptionChainReq) -> dict:
    return await client.get_option_chain(params.underlying, params.expiry)

async def search_contracts(client: IBKRClient, params: SearchContractsReq) -> dict:
    return {"contracts": await client.search_contracts(params.symbol, params.sec_type)}

async def get_clock(client: IBKRClient, params: GetClockReq) -> dict:
    import datetime as _dt
    now = _dt.datetime.now(_dt.UTC)
    return {
        "timestamp": now.isoformat(),
        "is_open": _dt.time(13, 30) <= now.time() <= _dt.time(20, 0)
                   and now.weekday() < 5,
    }


# === Streaming tools ===


def _sec_type_for(asset_class: str) -> str:
    return _SEC_TYPE_MAP.get(asset_class.lower(), "STK")


async def get_tick(
    client: IBKRClient, params: GetTickReq,
    *, ws: IBKRWebSocket, timeout_s: float = 3.0,
) -> dict:
    sec = _sec_type_for(params.asset_class)
    conid = await client.resolve_conid(params.symbol, sec)
    snap = ws.get_tick_snapshot(conid)
    if snap:
        return {**snap, "symbol": params.symbol}
    await ws.subscribe_tick(conid)
    deadline = asyncio.get_event_loop().time() + timeout_s
    while asyncio.get_event_loop().time() < deadline:
        snap = ws.get_tick_snapshot(conid)
        if snap:
            return {**snap, "symbol": params.symbol}
        await asyncio.sleep(0.05)
    raise IBKRError(f"IBKR_TICK_TIMEOUT: {params.symbol}")


async def get_depth(
    client: IBKRClient, params: GetDepthReq,
    *, ws: IBKRWebSocket, timeout_s: float = 3.0,
) -> dict:
    sec = _sec_type_for(params.asset_class)
    conid = await client.resolve_conid(params.symbol, sec)
    snap = ws.get_depth_snapshot(conid)
    if snap:
        return {**snap, "symbol": params.symbol}
    await ws.subscribe_depth(conid, exchange=params.exchange, rows=params.rows)
    deadline = asyncio.get_event_loop().time() + timeout_s
    while asyncio.get_event_loop().time() < deadline:
        snap = ws.get_depth_snapshot(conid)
        if snap:
            return {**snap, "symbol": params.symbol}
        await asyncio.sleep(0.05)
    raise IBKRError(f"IBKR_DEPTH_TIMEOUT: {params.symbol}")


async def subscribe_tick(
    client: IBKRClient, params: SubscribeTickReq, *, ws: IBKRWebSocket,
) -> dict:
    sec = _sec_type_for(params.asset_class)
    conid = await client.resolve_conid(params.symbol, sec)
    await ws.subscribe_tick(conid, forced=True)
    return {"symbol": params.symbol, "conid": conid, "subscribed": True}


async def unsubscribe(
    client: IBKRClient, params: UnsubscribeReq, *, ws: IBKRWebSocket,
) -> dict:
    sec = _sec_type_for(params.asset_class)
    conid = await client.resolve_conid(params.symbol, sec)
    await ws.unsubscribe(conid)
    return {"symbol": params.symbol, "conid": conid, "unsubscribed": True}