"""Contract tests for issue MCP tools (T020-T022)

These tests verify that the MCP tool interfaces remain stable and match the contract
defined in contracts/mcp-tools.yaml
"""

from unittest.mock import Mock

import pytest

# Note: These tests verify the tool signatures and behavior contracts
# Once FastMCP tools are implemented, we'll import them here


class TestIssueCreateToolContract:
    """Contract tests for jira_issue_create tool (T020)."""

    def test_tool_has_required_parameters(self) -> None:
        """Verify jira_issue_create has required parameters per contract."""
        # Contract specifies: project (required), summary (required)
        # Optional: issue_type, description, priority, assignee, labels, due_date, custom_fields
        # This test will verify tool registration once implemented
        assert True  # Placeholder for FastMCP tool inspection

    def test_tool_validates_required_fields(self) -> None:
        """Verify tool rejects requests missing required fields."""
        # When implemented, this should test that calling without project or summary fails
        assert True  # Placeholder

    def test_tool_returns_created_issue(self) -> None:
        """Verify tool returns issue with key, id, and field values."""
        # Expected return: {"key": "PROJ-123", "id": "10001", "summary": "...", ...}
        assert True  # Placeholder

    def test_tool_handles_custom_fields(self) -> None:
        """Verify tool accepts and processes custom_fields parameter."""
        assert True  # Placeholder

    def test_tool_validates_custom_fields_against_schema(self) -> None:
        """Verify tool validates custom field values before submission."""
        assert True  # Placeholder


class TestIssueUpdateToolContract:
    """Contract tests for jira_issue_update tool (T021)."""

    def test_tool_has_required_parameters(self) -> None:
        """Verify jira_issue_update has issue_key parameter."""
        # Contract specifies: issue_key (required)
        # Optional: summary, description, priority, assignee, labels, due_date, custom_fields
        assert True  # Placeholder

    def test_tool_validates_issue_key_format(self) -> None:
        """Verify tool validates issue key format (PROJECT-123)."""
        # Invalid formats should fail: "invalid", "123", "PROJ"
        assert True  # Placeholder

    def test_tool_updates_only_provided_fields(self) -> None:
        """Verify tool updates only fields that are provided."""
        # If only summary provided, should not touch other fields
        assert True  # Placeholder

    def test_tool_returns_updated_issue(self) -> None:
        """Verify tool returns updated issue data."""
        assert True  # Placeholder


class TestIssueGetToolContract:
    """Contract tests for jira_issue_get tool (T022)."""

    def test_tool_has_required_parameters(self) -> None:
        """Verify jira_issue_get has issue_key parameter."""
        # Contract specifies: issue_key (required)
        assert True  # Placeholder

    def test_tool_validates_issue_key_format(self) -> None:
        """Verify tool validates issue key format."""
        assert True  # Placeholder

    def test_tool_returns_full_issue_details(self) -> None:
        """Verify tool returns all standard and custom fields."""
        # Should include: key, summary, status, all custom fields
        assert True  # Placeholder

    def test_tool_handles_nonexistent_issue(self) -> None:
        """Verify tool returns clear error for non-existent issues."""
        assert True  # Placeholder


class TestIssueToolsErrorHandling:
    """Contract tests for error handling across all issue tools."""

    def test_tools_handle_authentication_failure(self) -> None:
        """Verify all tools return clear error on auth failure."""
        # Should return: "Authentication failed. Check your JIRA_TOKEN..."
        assert True  # Placeholder

    def test_tools_handle_network_timeout(self) -> None:
        """Verify all tools handle network timeouts gracefully."""
        assert True  # Placeholder

    def test_tools_handle_validation_errors(self) -> None:
        """Verify all tools return actionable validation error messages."""
        # Should include field name and reason
        assert True  # Placeholder

    def test_tools_handle_permission_errors(self) -> None:
        """Verify all tools handle permission denied errors."""
        assert True  # Placeholder


# Integration placeholders - these will test actual MCP tool execution
# once FastMCP server is implemented


@pytest.mark.integration
class TestIssueToolsIntegration:
    """Integration tests for issue tools with mocked Jira responses."""

    @pytest.fixture
    def mock_jira_client(self) -> Mock:
        """Create mock JiraClient for testing."""
        return Mock()

    def test_create_issue_end_to_end(self, mock_jira_client: Mock) -> None:
        """Test creating issue through MCP tool."""
        # Setup mock to return created issue
        mock_jira_client.create_issue.return_value = {
            "key": "PROJ-123",
            "id": "10001",
        }

        # Call MCP tool
        # result = jira_issue_create(project="PROJ", summary="Test")

        # Verify result
        # assert result["key"] == "PROJ-123"

        assert True  # Placeholder

    def test_update_issue_end_to_end(self, mock_jira_client: Mock) -> None:
        """Test updating issue through MCP tool."""
        assert True  # Placeholder

    def test_get_issue_end_to_end(self, mock_jira_client: Mock) -> None:
        """Test getting issue through MCP tool."""
        assert True  # Placeholder
