from pathlib import Path

import pytest

from llm_trade_bot.config import ConfigError, load_config

CONFIG = """
[deepseek]
api_key = "deepseek-key"
[bybit]
api_key = "bybit-key"
api_secret = "bybit-secret"
[telegram]
api_id = 123
api_hash = "api-hash"
bot_token = "bot-token"
admin_user_ids = [42]
[brave]
api_key = "brave-key"
[prompts]
file_path = "prompts.md"
[schedule]
timezone = "Europe/Warsaw"
times = ["09:00", "21:00"]
[scanner]
categories = ["spot", "linear"]
[risk]
max_risk_per_trade_pct = 2
max_total_exposure_pct = 40
max_positions = 5
max_leverage = 3
[storage]
database_path = "state.db"
"""

PROMPTS = """# Prompts
## master_prompt
Master prompt.
## run_prompt
Run prompt.
"""


def write_config(tmp_path: Path, content: str = CONFIG) -> Path:
    path = tmp_path / "config.toml"
    path.write_text(content, encoding="utf-8")
    (tmp_path / "prompts.md").write_text(PROMPTS, encoding="utf-8")
    return path


def test_loads_and_resolves_database_path(tmp_path: Path):
    path = write_config(tmp_path)
    config = load_config(path)
    assert config.deepseek.model == "deepseek-flash"
    assert config.telegram.admin_user_ids == frozenset({42})
    assert config.storage.database_path == tmp_path / "state.db"
    assert config.prompts.file_path == tmp_path / "prompts.md"


def test_rejects_risk_above_hard_limit(tmp_path: Path):
    path = write_config(tmp_path, CONFIG.replace("max_leverage = 3", "max_leverage = 4"))
    with pytest.raises(ConfigError, match="max_leverage"):
        load_config(path)


def test_rejects_non_official_deepseek_endpoint(tmp_path: Path):
    changed = CONFIG.replace("api_key = \"deepseek-key\"", 'api_key = "deepseek-key"\nbase_url = "https://example.com"', 1)
    path = write_config(tmp_path, changed)
    with pytest.raises(ConfigError, match="base_url"):
        load_config(path)


def test_rejects_missing_prompts_file(tmp_path: Path):
    path = tmp_path / "config.toml"
    path.write_text(CONFIG, encoding="utf-8")
    with pytest.raises(ConfigError, match="Prompts file not found"):
        load_config(path)


def test_legacy_bybit_config_selects_bybit(tmp_path: Path):
    config = load_config(write_config(tmp_path))
    assert config.exchange.provider == "bybit"
    assert config.bybit is not None
    assert config.binance is None


def test_binance_config_only_requires_binance_credentials(tmp_path: Path):
    content = CONFIG.replace(
        '[bybit]\napi_key = "bybit-key"\napi_secret = "bybit-secret"\n',
        '''[exchange]
provider = "binance"
[binance.spot]
api_key = "spot-key"
api_secret = "spot-secret"
[binance.usdm]
api_key = "usdm-key"
api_secret = "usdm-secret"
''',
    )
    config = load_config(write_config(tmp_path, content))
    assert config.exchange.provider == "binance"
    assert config.bybit is None
    assert config.binance is not None
    assert config.binance.spot.api_key == "spot-key"


def test_binance_rejects_endpoint_override(tmp_path: Path):
    content = CONFIG.replace(
        '[bybit]\napi_key = "bybit-key"\napi_secret = "bybit-secret"\n',
        '''[exchange]
provider = "binance"
[binance]
base_url = "https://api.binance.com"
[binance.spot]
api_key = "spot-key"
api_secret = "spot-secret"
[binance.usdm]
api_key = "usdm-key"
api_secret = "usdm-secret"
''',
    )
    with pytest.raises(ConfigError, match="fixed to Testnet"):
        load_config(write_config(tmp_path, content))


def test_binance_requires_both_selected_wallet_credentials(tmp_path: Path):
    content = CONFIG.replace(
        '[bybit]\napi_key = "bybit-key"\napi_secret = "bybit-secret"\n',
        '''[exchange]
provider = "binance"
[binance.spot]
api_key = "spot-key"
api_secret = "spot-secret"
[binance.usdm]
api_key = "replace-me"
api_secret = "replace-me"
''',
    )
    with pytest.raises(ConfigError, match="placeholder"):
        load_config(write_config(tmp_path, content))