"""
Mock Compatibility Validation Tests

Validates that test mocks match actual domain models and prevent
the interface compatibility issues encountered in Issue #59.
"""

import pytest
from unittest.mock import Mock
from datetime import datetime, timezone
from typing import List

# Import domain models for validation
from domain.issues.models import Issue, IssueState, Label


class TestMockCompatibility:
    """Validate that test mocks match actual domain models."""

    def test_issue_mock_has_all_required_attributes(self):
        """Test that Issue mocks include all required attributes."""
        # Create a real Issue to get expected attributes
        real_issue = Issue(
            number=1,
            title="Real Issue",
            state=IssueState.OPEN,
            labels=[],
            created_at=datetime.now(timezone.utc),
            updated_at=datetime.now(timezone.utc)
        )

        # Create mock with spec
        mock_issue = Mock(spec=Issue)
        mock_issue.number = 1
        mock_issue.title = "Mock Issue"
        mock_issue.state = IssueState.OPEN
        mock_issue.labels = []
        mock_issue.created_at = datetime.now(timezone.utc)
        mock_issue.updated_at = datetime.now(timezone.utc)
        mock_issue.milestone = None
        mock_issue.assignee = None

        # Verify critical attributes match
        real_attrs = {attr for attr in dir(real_issue) if not attr.startswith('_')}
        mock_attrs = {attr for attr in dir(mock_issue) if not attr.startswith('_')}

        missing_attrs = real_attrs - mock_attrs
        # Filter out methods - we only care about data attributes
        critical_missing = [attr for attr in missing_attrs
                          if not callable(getattr(real_issue, attr, None))]

        assert not critical_missing, f"Mock missing critical attributes: {critical_missing}"

    def test_issue_mock_uses_correct_types(self):
        """Test that Issue mocks use correct types."""
        mock_issue = Mock(spec=Issue)
        mock_issue.state = IssueState.OPEN  # Should be enum, not string

        assert isinstance(mock_issue.state, IssueState), "State should be IssueState enum"

    def test_issue_mock_correct_pattern_from_issue_59_fix(self):
        """Test the correct mock pattern that fixes Issue #59 problems."""
        # ✅ CORRECT pattern - what we learned from Issue #59
        mock_datetime = Mock()
        mock_datetime.strftime.return_value = "2023-01-01 00:00"

        mock_issue = Mock(spec=Issue)  # Use spec parameter!
        mock_issue.number = 59
        mock_issue.title = "Test Issue"
        mock_issue._body = "Test issue body"  # CLI expects _body attribute
        mock_issue.state = Mock()
        mock_issue.state.value = "open"  # CLI converts state.value
        mock_issue.created_at = mock_datetime  # Must support strftime()
        mock_issue.updated_at = mock_datetime
        mock_issue.labels = []
        mock_issue.assignee = None
        mock_issue.milestone = None

        # Attributes that the view layer expects (learned from Issue #59)
        mock_issue.state_label = "OPEN"
        mock_issue.priority_label = "Normal"
        mock_issue.type_labels = []
        mock_issue.other_labels = []
        mock_issue.html_url = ""
        mock_issue.kanban_column = "To Do"

        # Verify it behaves like Issue #59 tests expect
        assert mock_issue.number == 59
        assert mock_issue.state.value == "open"
        assert mock_issue.created_at.strftime('%Y-%m-%d') == "2023-01-01 00:00"
        assert isinstance(mock_issue.labels, list)

    def test_label_mock_has_correct_attributes(self):
        """Test that Label mocks match domain model."""
        real_label = Label(name="bug", color="#ff0000", description="Bug label")

        mock_label = Mock(spec=Label)
        mock_label.name = "bug"
        mock_label.color = "#ff0000"
        mock_label.description = "Bug label"

        # Verify key attributes exist
        assert hasattr(mock_label, 'name')
        assert hasattr(mock_label, 'color')
        assert hasattr(mock_label, 'description')

    def test_enum_vs_string_validation(self):
        """Validate that enums are used instead of strings (Issue #59 lesson)."""
        # ❌ WRONG - what caused Issue #59 problems
        wrong_mock = Mock()
        wrong_mock.state = "open"  # String instead of enum!

        # ✅ CORRECT - proper enum usage
        correct_mock = Mock(spec=Issue)
        correct_mock.state = IssueState.OPEN

        # Verify correct usage
        assert isinstance(correct_mock.state, IssueState)
        assert not isinstance(wrong_mock.state, IssueState)

        # This test serves as documentation of the correct pattern


class TestIssue59Prevention:
    """Specific tests to prevent Issue #59 problems from recurring."""

    def test_plugin_manager_mock_discovery_pattern(self):
        """Test the correct plugin manager mocking pattern."""
        from markitect.issues.manager import IssuePluginManager

        # ✅ CORRECT: Mock at _discover_plugins level (learned from Issue #59)
        from unittest.mock import patch
        with patch.object(IssuePluginManager, '_discover_plugins') as mock_discover:
            mock_plugin_class = Mock()
            mock_discover.return_value = {'gitea': mock_plugin_class}

            manager = IssuePluginManager()

            # This pattern works because it mocks at the right level
            assert 'gitea' in manager.plugins
            mock_plugin_class.assert_not_called()  # Only called when get_backend() is used

    def test_cli_mock_realistic_attributes(self):
        """Test CLI layer mocks have all required attributes for views."""
        # These are the attributes the CLI view layer expects (learned from Issue #59)
        required_view_attributes = [
            'number', 'title', 'state', 'created_at', 'updated_at',
            'labels', 'assignee', 'milestone', '_body'
        ]

        # Additional attributes the view expects (discovered during Issue #59 fixing)
        view_layer_attributes = [
            'state_label', 'priority_label', 'type_labels',
            'other_labels', 'html_url', 'kanban_column'
        ]

        mock_issue = Mock(spec=Issue)

        # Set all required attributes
        for attr in required_view_attributes:
            setattr(mock_issue, attr, None)  # Set to None or appropriate default

        for attr in view_layer_attributes:
            setattr(mock_issue, attr, None)

        # Verify all critical attributes exist
        for attr in required_view_attributes + view_layer_attributes:
            assert hasattr(mock_issue, attr), f"Mock missing required attribute: {attr}"

    def test_datetime_mock_strftime_support(self):
        """Test datetime mocks support strftime (Issue #59 requirement)."""
        # The view layer calls created_at.strftime() - mocks must support this
        mock_datetime = Mock()
        mock_datetime.strftime.return_value = "2023-01-01"

        mock_issue = Mock(spec=Issue)
        mock_issue.created_at = mock_datetime
        mock_issue.updated_at = mock_datetime

        # Verify strftime works
        assert mock_issue.created_at.strftime('%Y-%m-%d') == "2023-01-01"
        assert mock_issue.updated_at.strftime('%Y-%m-%d') == "2023-01-01"


class TestMockGuidelines:
    """Tests that demonstrate correct mock patterns for future development."""

    def test_correct_mock_creation_pattern(self):
        """Demonstrate the correct way to create mocks."""
        # ✅ ALWAYS use spec= parameter
        mock_issue = Mock(spec=Issue)

        # ✅ Use actual enums, not strings
        mock_issue.state = IssueState.OPEN

        # ✅ Include all required attributes based on domain model analysis
        mock_issue.number = 1
        mock_issue.title = "Test"
        mock_issue.labels = []
        mock_issue.created_at = datetime.now(timezone.utc)
        mock_issue.updated_at = datetime.now(timezone.utc)

        # Verify this is the correct pattern
        assert hasattr(mock_issue, '_spec_class')  # Mock(spec=X) creates this
        assert isinstance(mock_issue.state, IssueState)

    def test_integration_test_mocking_strategy(self):
        """Demonstrate proper mocking for integration tests."""
        # For integration tests, create mocks that match the actual interface contracts
        from markitect.issues.base import IssueBackend

        mock_backend = Mock(spec=IssueBackend)
        mock_backend.list_issues.return_value = []
        mock_backend.get_issue.return_value = Mock(spec=Issue)

        # Verify the mock supports the interface
        assert hasattr(mock_backend, 'list_issues')
        assert hasattr(mock_backend, 'get_issue')
        assert callable(mock_backend.list_issues)


if __name__ == '__main__':
    pytest.main([__file__, '-v'])