"""
Test suite for Gitea backend functionality.

These tests ensure the Gitea backend works correctly with the API.
"""

import pytest
import json
from unittest.mock import Mock, patch, MagicMock
from issue_core.backends.gitea.backend import GiteaBackend, GiteaAPIError


class TestGiteaBackend:
    """Test Gitea backend implementation."""

    def setup_method(self):
        """Set up test environment."""
        self.backend = GiteaBackend()
        self.test_config = {
            'type': 'gitea',
            'base_url': 'https://git.example.com',
            'owner': 'testorg',
            'repo': 'testrepo',
            'token': 'test-token'
        }

    def test_backend_initialization(self):
        """Test backend initializes correctly."""
        assert self.backend.base_url is None
        assert self.backend.token is None
        assert self.backend.owner is None
        assert self.backend.repo is None
        assert self.backend.session is not None

    @patch('issue_core.backends.gitea.backend.requests.Session')
    def test_connect_success(self, mock_session_class):
        """Test successful connection to Gitea API."""
        mock_session = MagicMock()
        mock_session_class.return_value = mock_session

        # Mock successful API response
        mock_response = Mock()
        mock_response.status_code = 200
        mock_session.request.return_value = mock_response

        backend = GiteaBackend()
        backend.session = mock_session

        backend.connect(self.test_config)

        # Verify configuration is set
        assert backend.base_url == 'https://git.example.com'
        assert backend.token == 'test-token'
        assert backend.owner == 'testorg'
        assert backend.repo == 'testrepo'

        # Verify headers are set
        mock_session.headers.update.assert_called_once_with({
            'Authorization': 'token test-token',
            'Content-Type': 'application/json',
            'Accept': 'application/json'
        })

    @patch('issue_core.backends.gitea.backend.requests.Session')
    def test_connect_failure(self, mock_session_class):
        """Test failed connection raises appropriate error."""
        mock_session = MagicMock()
        mock_session_class.return_value = mock_session

        # Mock failed API response
        mock_response = Mock()
        mock_response.status_code = 404
        mock_session.request.return_value = mock_response

        backend = GiteaBackend()
        backend.session = mock_session

        with pytest.raises(GiteaAPIError, match="Failed to connect to Gitea API"):
            backend.connect(self.test_config)

    def test_url_construction_fix(self):
        """Test that URL construction properly handles urljoin edge cases."""
        backend = GiteaBackend()
        backend.base_url = 'https://git.example.com'

        # Test the fixed _api_request URL construction
        with patch.object(backend.session, 'request') as mock_request:
            mock_response = Mock()
            mock_response.status_code = 200
            mock_request.return_value = mock_response

            backend._api_request('GET', '/repos/owner/repo')

            # Verify the correct URL was called
            mock_request.assert_called_once()
            called_url = mock_request.call_args[1]['url'] if 'url' in mock_request.call_args[1] else mock_request.call_args[0][1]
            assert called_url == 'https://git.example.com/api/v1/repos/owner/repo'

    @patch('issue_core.backends.gitea.backend.requests.Session')
    def test_test_connection_success(self, mock_session_class):
        """Test test_connection method works correctly."""
        mock_session = MagicMock()
        mock_session_class.return_value = mock_session

        # Mock successful API response
        mock_response = Mock()
        mock_response.status_code = 200
        mock_session.request.return_value = mock_response

        backend = GiteaBackend()
        backend.session = mock_session
        backend.base_url = 'https://git.example.com'
        backend.owner = 'testorg'
        backend.repo = 'testrepo'
        backend.token = 'test-token'

        result = backend.test_connection()
        assert result is True

    @patch('issue_core.backends.gitea.backend.requests.Session')
    def test_test_connection_failure(self, mock_session_class):
        """Test test_connection handles failures gracefully."""
        mock_session = MagicMock()
        mock_session_class.return_value = mock_session

        # Mock failed API response
        mock_response = Mock()
        mock_response.status_code = 404
        mock_response.raise_for_status.side_effect = Exception("404 Not Found")
        mock_session.request.return_value = mock_response

        backend = GiteaBackend()
        backend.session = mock_session
        backend.base_url = 'https://git.example.com'
        backend.owner = 'testorg'
        backend.repo = 'testrepo'
        backend.token = 'test-token'

        result = backend.test_connection()
        assert result is False

    @patch('issue_core.backends.gitea.backend.requests.Session')
    def test_get_issue_success(self, mock_session_class):
        """Test successful issue retrieval."""
        mock_session = MagicMock()
        mock_session_class.return_value = mock_session

        # Mock Gitea issue response
        gitea_issue = {
            "id": 123,
            "number": 42,
            "title": "Test Issue",
            "body": "Test description",
            "state": "open",
            "user": {"login": "testuser", "email": "test@example.com"},
            "created_at": "2023-01-01T12:00:00Z",
            "updated_at": "2023-01-01T12:00:00Z",
            "labels": [],
            "assignees": [],
            "milestone": None,
            "comments": 0
        }

        mock_response = Mock()
        mock_response.status_code = 200
        mock_response.json.return_value = gitea_issue
        mock_session.request.return_value = mock_response

        backend = GiteaBackend()
        backend.session = mock_session
        backend.base_url = 'https://git.example.com'
        backend.owner = 'testorg'
        backend.repo = 'testrepo'
        backend.token = 'test-token'

        issue = backend.get_issue(42)

        assert issue.number == 42
        assert issue.title == "Test Issue"
        assert issue.description == "Test description"
        assert issue.state.value == "open"

    def test_disconnect(self):
        """Test disconnect method cleans up properly."""
        self.backend.base_url = 'https://git.example.com'
        self.backend.token = 'test-token'
        self.backend.owner = 'testorg'
        self.backend.repo = 'testrepo'

        self.backend.disconnect()

        assert self.backend.base_url is None
        assert self.backend.token is None
        assert self.backend.owner is None
        assert self.backend.repo is None