import pytest
from unittest.mock import patch, MagicMock
from fastapi.testclient import TestClient
from main import app

# Create a test client
client = TestClient(app)

def test_health_check():
    """Test the health check endpoint."""
    response = client.get("/health")
    assert response.status_code == 200
    assert "status" in response.json()
    assert response.json()["status"] == "healthy"

def test_favicon():
    """Test the favicon endpoint."""
    response = client.get("/favicon.ico")
    # The favicon endpoint serves the actual favicon file, so we expect a 200
    # If the file doesn't exist, it would return a 404, but in our case it should exist
    assert response.status_code == 200

def test_get_client_config():
    """Test the client configuration endpoint."""
    response = client.get("/config")
    assert response.status_code == 200
    data = response.json()
    assert "client_id" in data
    assert "issuer" in data
    # Just check that we get a client_id, not necessarily the test value
    assert isinstance(data["client_id"], str)
    assert len(data["client_id"]) > 0

@patch('main.verify_token')
def test_validate_token_success(mock_verify_token):
    """Test successful token validation."""
    # Mock the verify_token function to return a valid payload
    mock_verify_token.return_value = {
        "email": "rene.luria@infomaniak.com",
        "iss": "https://login.infomaniak.com",
        "aud": "test-client-id"
    }
    
    response = client.post("/validate-token", json={
        "id_token": "valid.token.here"
    })
    
    assert response.status_code == 200
    data = response.json()
    assert data["valid"]
    assert data["user"] is not None
    assert data["user"]["email"] == "rene.luria@infomaniak.com"
    assert data["secret_phrase"] == "Welcome to the secret club!"

@patch('main.verify_token')
def test_validate_token_unauthorized_user(mock_verify_token):
    """Test token validation for unauthorized user."""
    # Mock the verify_token function to return a payload with unauthorized user
    mock_verify_token.return_value = {
        "email": "unauthorized@example.com",
        "iss": "https://login.infomaniak.com",
        "aud": "test-client-id"
    }
    
    response = client.post("/validate-token", json={
        "id_token": "valid.token.here"
    })
    
    assert response.status_code == 200
    data = response.json()
    assert data["valid"]
    assert data["user"] is not None
    assert data["user"]["email"] == "unauthorized@example.com"
    assert data["secret_phrase"] is None

@patch('main.verify_token')
def test_validate_token_missing_email(mock_verify_token):
    """Test token validation when email is missing from token."""
    # Mock the verify_token function to return a payload without email
    mock_verify_token.return_value = {
        "iss": "https://login.infomaniak.com",
        "aud": "test-client-id"
    }
    
    response = client.post("/validate-token", json={
        "id_token": "token.without.email"
    })
    
    assert response.status_code == 200
    data = response.json()
    assert not data["valid"]
    assert data["error"] == "Email not found in token"

@patch('main.verify_token')
def test_validate_token_invalid(mock_verify_token):
    """Test validation with an invalid token."""
    # Mock the verify_token function to raise an exception
    mock_verify_token.side_effect = ValueError("Invalid token")
    
    response = client.post("/validate-token", json={
        "id_token": "invalid.token.here"
    })
    
    assert response.status_code == 200
    data = response.json()
    assert not data["valid"]
    assert data["error"] == "Invalid token"

def test_validate_token_empty_request():
    """Test validation with empty token."""
    response = client.post("/validate-token", json={
        "id_token": ""
    })
    
    assert response.status_code == 200
    data = response.json()
    assert not data["valid"]

@patch('main.refresh_token')
def test_refresh_token_success(mock_refresh_token):
    """Test successful token refresh."""
    # Mock the refresh_token function
    mock_refresh_token.return_value = {
        "access_token": "new-access-token",
        "id_token": "new-id-token",
        "expires_in": 3600,
        "token_type": "Bearer"
    }
    
    response = client.post("/refresh-token", json={
        "refresh_token": "valid-refresh-token"
    })
    
    assert response.status_code == 200
    data = response.json()
    assert data["access_token"] == "new-access-token"
    assert data["id_token"] == "new-id-token"
    assert data["expires_in"] == 3600
    assert data["token_type"] == "Bearer"

@patch('main.refresh_token')
def test_refresh_token_failure(mock_refresh_token):
    """Test token refresh failure."""
    # Mock the refresh_token function to raise an exception
    mock_refresh_token.side_effect = ValueError("Invalid refresh token")
    
    response = client.post("/refresh-token", json={
        "refresh_token": "invalid-refresh-token"
    })
    
    assert response.status_code == 200
    data = response.json()
    assert data["error"] == "Invalid refresh token"