"""Contract tests for get_project_summary MCP tool."""

from pathlib import Path

import pytest

from xer_mcp.db import db


@pytest.fixture(autouse=True)
def setup_db():
    """Initialize and clear database for each test."""
    db.initialize()
    yield
    db.clear()


class TestGetProjectSummaryContract:
    """Contract tests verifying get_project_summary tool interface."""

    async def test_get_project_summary_returns_basic_info(
        self, sample_xer_single_project: Path
    ) -> None:
        """get_project_summary returns project name, dates, and activity count."""
        from xer_mcp.tools.get_project_summary import get_project_summary
        from xer_mcp.tools.load_xer import load_xer

        await load_xer(file_path=str(sample_xer_single_project))

        result = await get_project_summary()

        assert "project_name" in result
        assert "data_date" in result
        assert "plan_start_date" in result
        assert "plan_end_date" in result
        assert "activity_count" in result

    async def test_get_project_summary_returns_correct_values(
        self, sample_xer_single_project: Path
    ) -> None:
        """get_project_summary returns correct project values from loaded XER."""
        from xer_mcp.tools.get_project_summary import get_project_summary
        from xer_mcp.tools.load_xer import load_xer

        await load_xer(file_path=str(sample_xer_single_project))

        result = await get_project_summary()

        assert result["project_name"] == "Test Project"
        assert result["activity_count"] == 5

    async def test_get_project_summary_includes_milestone_count(
        self, sample_xer_single_project: Path
    ) -> None:
        """get_project_summary includes count of milestones."""
        from xer_mcp.tools.get_project_summary import get_project_summary
        from xer_mcp.tools.load_xer import load_xer

        await load_xer(file_path=str(sample_xer_single_project))

        result = await get_project_summary()

        assert "milestone_count" in result
        assert result["milestone_count"] == 2

    async def test_get_project_summary_includes_critical_count(
        self, sample_xer_single_project: Path
    ) -> None:
        """get_project_summary includes count of critical path activities."""
        from xer_mcp.tools.get_project_summary import get_project_summary
        from xer_mcp.tools.load_xer import load_xer

        await load_xer(file_path=str(sample_xer_single_project))

        result = await get_project_summary()

        assert "critical_activity_count" in result
        assert result["critical_activity_count"] == 4

    async def test_get_project_summary_no_file_loaded_returns_error(self) -> None:
        """get_project_summary without loaded file returns NO_FILE_LOADED error."""
        from xer_mcp.server import set_file_loaded
        from xer_mcp.tools.get_project_summary import get_project_summary

        set_file_loaded(False)
        result = await get_project_summary()

        assert "error" in result
        assert result["error"]["code"] == "NO_FILE_LOADED"