from __future__ import annotations

import pytest
from cerbero_mcp.common.candles import Candle, validate_candles
from fastapi import HTTPException


def test_valid_candle():
    c = Candle(timestamp=1_700_000_000_000, open=100.0, high=110.0,
               low=95.0, close=105.0, volume=12.5)
    assert c.high == 110.0


def test_high_below_close_rejected():
    with pytest.raises(ValueError):
        Candle(timestamp=1, open=100, high=90, low=80, close=95, volume=1)


def test_high_below_open_rejected():
    with pytest.raises(ValueError):
        Candle(timestamp=1, open=100, high=90, low=80, close=85, volume=1)


def test_low_above_close_rejected():
    with pytest.raises(ValueError):
        Candle(timestamp=1, open=100, high=110, low=105, close=102, volume=1)


def test_low_above_open_rejected():
    with pytest.raises(ValueError):
        Candle(timestamp=1, open=95, high=110, low=100, close=105, volume=1)


def test_negative_volume_rejected():
    with pytest.raises(ValueError):
        Candle(timestamp=1, open=100, high=110, low=90, close=105, volume=-1)


def test_non_positive_timestamp_rejected():
    with pytest.raises(ValueError):
        Candle(timestamp=0, open=100, high=110, low=90, close=105, volume=1)


def test_validate_candles_sorts_by_timestamp():
    raw = [
        {"timestamp": 3, "open": 1, "high": 2, "low": 1, "close": 1, "volume": 0},
        {"timestamp": 1, "open": 1, "high": 2, "low": 1, "close": 1, "volume": 0},
        {"timestamp": 2, "open": 1, "high": 2, "low": 1, "close": 1, "volume": 0},
    ]
    out = validate_candles(raw)
    assert [c["timestamp"] for c in out] == [1, 2, 3]


def test_validate_candles_coerces_string_numerics():
    raw = [{"timestamp": "1", "open": "100", "high": "110",
            "low": "90", "close": "105", "volume": "10"}]
    out = validate_candles(raw)
    assert out[0]["open"] == 100.0
    assert isinstance(out[0]["volume"], float)


def test_validate_candles_malformed_raises_http_502():
    raw = [{"timestamp": 1, "open": 100, "high": 50, "low": 90,
            "close": 105, "volume": 1}]
    with pytest.raises(HTTPException) as exc_info:
        validate_candles(raw)
    assert exc_info.value.status_code == 502
    assert "candle" in str(exc_info.value.detail).lower()


def test_validate_candles_empty_list():
    assert validate_candles([]) == []