from __future__ import annotations

import pytest
from mcp_common.environment import (
    EnvironmentInfo,
    EnvironmentMismatchError,
    consistency_check,
    resolve_environment,
)


def test_env_var_overrides_secret(monkeypatch):
    monkeypatch.setenv("DERIBIT_TESTNET", "false")
    creds = {"testnet": True, "base_url_live": "L", "base_url_testnet": "T"}
    info = resolve_environment(
        creds,
        env_var="DERIBIT_TESTNET",
        flag_key="testnet",
        exchange="deribit",
    )
    assert info.environment == "mainnet"
    assert info.source == "env"
    assert info.env_value == "false"
    assert info.base_url == "L"


def test_secret_used_when_env_missing(monkeypatch):
    monkeypatch.delenv("DERIBIT_TESTNET", raising=False)
    creds = {"testnet": True, "base_url_live": "L", "base_url_testnet": "T"}
    info = resolve_environment(
        creds,
        env_var="DERIBIT_TESTNET",
        flag_key="testnet",
        exchange="deribit",
    )
    assert info.environment == "testnet"
    assert info.source == "credentials"
    assert info.env_value is None
    assert info.base_url == "T"


def test_default_when_both_missing(monkeypatch):
    monkeypatch.delenv("FOO_TESTNET", raising=False)
    creds = {"base_url_live": "L", "base_url_testnet": "T"}
    info = resolve_environment(
        creds,
        env_var="FOO_TESTNET",
        flag_key="testnet",
        exchange="foo",
    )
    assert info.environment == "testnet"
    assert info.source == "default"
    assert info.env_value is None


@pytest.mark.parametrize("raw,expected", [
    ("1", "testnet"),
    ("true", "testnet"),
    ("yes", "testnet"),
    ("on", "testnet"),
    ("TRUE", "testnet"),
    ("0", "mainnet"),
    ("false", "mainnet"),
    ("no", "mainnet"),
    ("off", "mainnet"),
    ("garbage", "mainnet"),
])
def test_env_value_truthy_parsing(monkeypatch, raw, expected):
    monkeypatch.setenv("X_TESTNET", raw)
    info = resolve_environment(
        {"base_url_live": "L", "base_url_testnet": "T"},
        env_var="X_TESTNET",
        flag_key="testnet",
        exchange="x",
    )
    assert info.environment == expected


def test_default_base_urls_applied_when_creds_missing(monkeypatch):
    monkeypatch.delenv("X_TESTNET", raising=False)
    creds: dict = {}
    info = resolve_environment(
        creds,
        env_var="X_TESTNET",
        flag_key="testnet",
        exchange="x",
        default_base_url_live="https://live.example",
        default_base_url_testnet="https://test.example",
    )
    assert info.base_url == "https://test.example"
    assert creds["base_url_live"] == "https://live.example"
    assert creds["base_url_testnet"] == "https://test.example"


def test_creds_base_urls_override_defaults(monkeypatch):
    monkeypatch.delenv("X_TESTNET", raising=False)
    creds = {"base_url_live": "L", "base_url_testnet": "T"}
    info = resolve_environment(
        creds,
        env_var="X_TESTNET",
        flag_key="testnet",
        exchange="x",
        default_base_url_live="https://live.example",
        default_base_url_testnet="https://test.example",
    )
    assert info.base_url == "T"
    assert creds["base_url_live"] == "L"


def test_alpaca_paper_flag_key(monkeypatch):
    """Alpaca usa 'paper' invece di 'testnet' nel secret."""
    monkeypatch.delenv("ALPACA_PAPER", raising=False)
    creds = {"paper": False, "base_url_live": "L", "base_url_testnet": "T"}
    info = resolve_environment(
        creds,
        env_var="ALPACA_PAPER",
        flag_key="paper",
        exchange="alpaca",
    )
    assert info.environment == "mainnet"
    assert info.source == "credentials"


# ───────── consistency_check ─────────


def _info(env: str, exchange: str = "deribit") -> EnvironmentInfo:
    """Helper costruisce EnvironmentInfo per test."""
    return EnvironmentInfo(
        exchange=exchange,
        environment=env,
        source="env",
        env_value="false" if env == "mainnet" else "true",
        base_url=f"https://api.{exchange}.com" if env == "mainnet" else f"https://test.{exchange}.com",
    )


def test_consistency_check_testnet_no_confirmation_ok():
    """Testnet senza conferma esplicita → ok, ritorna []. Default safe."""
    info = _info("testnet")
    creds = {"api_key": "k", "api_secret": "s"}
    warnings = consistency_check(info, creds)
    assert warnings == []


def test_consistency_check_mainnet_no_confirmation_raises():
    """Mainnet senza creds['environment']='mainnet' esplicito → fail-fast."""
    info = _info("mainnet")
    creds = {"api_key": "k", "api_secret": "s"}
    with pytest.raises(EnvironmentMismatchError, match="mainnet.*explicit confirmation"):
        consistency_check(info, creds)


def test_consistency_check_mainnet_with_confirmation_ok():
    info = _info("mainnet")
    creds = {"api_key": "k", "api_secret": "s", "environment": "mainnet"}
    warnings = consistency_check(info, creds)
    assert warnings == []


def test_consistency_check_explicit_mismatch_raises():
    """Secret dichiara mainnet ma resolver risolve testnet → fail-fast."""
    info = _info("testnet")
    creds = {"environment": "mainnet"}
    with pytest.raises(EnvironmentMismatchError, match="declared.*resolved"):
        consistency_check(info, creds)


def test_consistency_check_strict_mainnet_disabled():
    """Con strict_mainnet=False mainnet senza conferma logga warning ma non raise."""
    info = _info("mainnet")
    creds = {"api_key": "k", "api_secret": "s"}
    warnings = consistency_check(info, creds, strict_mainnet=False)
    assert any("mainnet" in w for w in warnings)


def test_consistency_check_url_does_not_match_environment_warns():
    """Base URL contiene 'test' ma environment='mainnet' → warning."""
    from mcp_common.environment import EnvironmentInfo
    info = EnvironmentInfo(
        exchange="bybit",
        environment="mainnet",
        source="env",
        env_value="false",
        base_url="https://api-testnet.bybit.com",  # url DICE testnet ma resolver MAINNET
    )
    creds = {"environment": "mainnet"}
    warnings = consistency_check(info, creds)
    assert any("base_url" in w.lower() for w in warnings)