"""Tests for authentication module."""

import os
import pytest
from gitea_mcp.auth import AuthConfig


def test_auth_config_success(monkeypatch):
    """Test successful authentication configuration."""
    monkeypatch.setenv("GITEA_API_URL", "http://gitea.example.com/api/v1")
    monkeypatch.setenv("GITEA_API_TOKEN", "test_token_123")

    config = AuthConfig()

    assert config.api_url == "http://gitea.example.com/api/v1"
    assert config.api_token == "test_token_123"


def test_auth_config_removes_trailing_slash(monkeypatch):
    """Test that trailing slash is removed from URL."""
    monkeypatch.setenv("GITEA_API_URL", "http://gitea.example.com/api/v1/")
    monkeypatch.setenv("GITEA_API_TOKEN", "test_token_123")

    config = AuthConfig()

    assert config.api_url == "http://gitea.example.com/api/v1"


def test_auth_config_missing_url(monkeypatch):
    """Test error when GITEA_API_URL is missing."""
    monkeypatch.delenv("GITEA_API_URL", raising=False)
    monkeypatch.setenv("GITEA_API_TOKEN", "test_token_123")

    with pytest.raises(ValueError, match="GITEA_API_URL"):
        AuthConfig()


def test_auth_config_missing_token(monkeypatch):
    """Test error when GITEA_API_TOKEN is missing."""
    monkeypatch.setenv("GITEA_API_URL", "http://gitea.example.com/api/v1")
    monkeypatch.delenv("GITEA_API_TOKEN", raising=False)

    with pytest.raises(ValueError, match="GITEA_API_TOKEN"):
        AuthConfig()


def test_get_auth_headers(monkeypatch):
    """Test authentication headers generation."""
    monkeypatch.setenv("GITEA_API_URL", "http://gitea.example.com/api/v1")
    monkeypatch.setenv("GITEA_API_TOKEN", "test_token_123")

    config = AuthConfig()
    headers = config.get_auth_headers()

    assert headers["Authorization"] == "token test_token_123"
    assert headers["Content-Type"] == "application/json"