from __future__ import annotations

from decimal import Decimal
from typing import Any

import pytest

from llm_trade_bot.binance_gateway import BinanceError, BinanceGateway
from llm_trade_bot.config import BinanceAccountConfig, BinanceConfig, ScannerConfig
from llm_trade_bot.models import (
    Category,
    OpenTradeRequest,
    OrderType,
    Side,
    ValidatedOrder,
)


class FakeBinanceClient:
    def __init__(self, exchange_info_path: str, mutation_results: list[dict[str, Any]]):
        self.exchange_info_path = exchange_info_path
        self.mutation_results = mutation_results
        self.requests: list[tuple[str, str, dict[str, Any] | None, dict[str, Any]]] = []
        self.mutations: list[tuple[str, str, dict[str, Any]]] = []

    async def request(self, method: str, path: str, parameters=None, **kwargs):
        self.requests.append((method, path, parameters, kwargs))
        if path == self.exchange_info_path:
            return {
                "symbols": [
                    {
                        "symbol": "BTCUSDT",
                        "status": "TRADING",
                        "otoAllowed": True,
                        "ocoAllowed": True,
                        "filters": [
                            {"filterType": "PRICE_FILTER", "tickSize": "0.1"},
                            {"filterType": "LOT_SIZE", "minQty": "0.001", "stepSize": "0.001"},
                            {"filterType": "MIN_NOTIONAL", "minNotional": "5"},
                        ],
                    }
                ]
            }
        if path == "/fapi/v1/positionSide/dual":
            return {"dualSidePosition": False}
        return {"ok": True}

    async def mutate_with_recovery(self, method: str, path: str, parameters: dict[str, Any], **kwargs):
        self.mutations.append((method, path, parameters))
        return self.mutation_results.pop(0)

    async def close(self) -> None:
        return None


def gateway(spot: FakeBinanceClient, usdm: FakeBinanceClient) -> BinanceGateway:
    return BinanceGateway(
        BinanceConfig(BinanceAccountConfig("spot-key", "spot-secret"), BinanceAccountConfig("future-key", "future-secret")),
        ScannerConfig(),
        spot_client=spot,  # type: ignore[arg-type]
        usdm_client=usdm,  # type: ignore[arg-type]
    )


def request(category: Category, **changes: Any) -> OpenTradeRequest:
    values = {
        "category": category,
        "symbol": "BTCUSDT",
        "side": Side.BUY,
        "order_type": OrderType.LIMIT if category is Category.SPOT else OrderType.MARKET,
        "reference_price": Decimal(100),
        "limit_price": Decimal(100) if category is Category.SPOT else None,
        "stop_loss": Decimal(90),
        "take_profit": Decimal(120),
        "trailing_distance": None,
        "risk_pct": Decimal(2),
        "leverage": Decimal(3),
        "rationale": "test",
    }
    values.update(changes)
    return OpenTradeRequest(**values)


def order(**changes: Any) -> ValidatedOrder:
    values = {
        "entry_price": Decimal(100),
        "quantity": Decimal(2),
        "notional": Decimal(200),
        "stop_loss": Decimal(90),
        "take_profit": Decimal(120),
        "trailing_distance": None,
        "leverage": Decimal(3),
    }
    values.update(changes)
    return ValidatedOrder(**values)


async def test_spot_uses_single_atomic_otoco_with_market_tp_and_sl():
    spot = FakeBinanceClient(
        "/api/v3/exchangeInfo",
        [
            {
                "orderListId": 7,
                "listOrderStatus": "EXECUTING",
                "orderReports": [{"orderId": 11, "clientOrderId": "ltb-1-entry", "status": "NEW"}],
            }
        ],
    )
    usdm = FakeBinanceClient("/fapi/v1/exchangeInfo", [])
    result = await gateway(spot, usdm).open_trade(request(Category.SPOT), order(), "ltb-1")
    assert result["provider"] == "binance"
    assert result["category"] == "spot"
    assert result["order_id"] == "11"
    assert len(spot.mutations) == 1
    method, path, parameters = spot.mutations[0]
    assert (method, path) == ("POST", "/api/v3/orderList/otoco")
    assert parameters["workingType"] == "LIMIT"
    assert parameters["workingSide"] == "BUY"
    assert parameters["pendingSide"] == "SELL"
    assert parameters["pendingAboveType"] == "TAKE_PROFIT"
    assert parameters["pendingBelowType"] == "STOP_LOSS"


async def test_futures_installs_stop_and_take_profit_after_market_fill():
    spot = FakeBinanceClient("/api/v3/exchangeInfo", [])
    usdm = FakeBinanceClient(
        "/fapi/v1/exchangeInfo",
        [
            {"orderId": 44, "status": "FILLED", "executedQty": "2", "avgPrice": "100"},
            {"algoId": 45},
            {"algoId": 46},
        ],
    )
    result = await gateway(spot, usdm).open_trade(request(Category.LINEAR), order(), "ltb-2")
    assert result["status"] == "Filled"
    assert result["protection"]["status"] == "active"
    assert [path for _, path, _ in usdm.mutations] == [
        "/fapi/v1/order",
        "/fapi/v1/algoOrder",
        "/fapi/v1/algoOrder",
    ]
    stop = usdm.mutations[1][2]
    take_profit = usdm.mutations[2][2]
    assert stop["type"] == "STOP_MARKET"
    assert stop["closePosition"] is True
    assert take_profit["type"] == "TAKE_PROFIT_MARKET"
    assert take_profit["closePosition"] is True
    assert any(path == "/fapi/v1/marginType" for _, path, _, _ in usdm.requests)
    assert any(path == "/fapi/v1/leverage" for _, path, _, _ in usdm.requests)


async def test_trailing_rate_outside_binance_range_rejects_before_opening():
    spot = FakeBinanceClient("/api/v3/exchangeInfo", [])
    usdm = FakeBinanceClient("/fapi/v1/exchangeInfo", [])
    with pytest.raises(BinanceError, match="callbackRate"):
        await gateway(spot, usdm).open_trade(
            request(Category.LINEAR, take_profit=None, trailing_distance=Decimal("0.05")),
            order(take_profit=None, trailing_distance=Decimal("0.05")),
            "ltb-3",
        )
    assert not usdm.requests
    assert not usdm.mutations