from __future__ import annotations

import json

import pytest

from mcp_common.environment import EnvironmentInfo, 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_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"