import pytest
from datetime import datetime
from src.models.data_structures import (
    Author,
    Commit,
    FileChange,
    CommitAnalysis,
    CodeChurnAnalysis,
    RiskyCommitAnalysis,
    VelocityAnalysis,
)


class TestAuthor:
    """Test Author dataclass."""

    def test_author_creation(self):
        """Test creating an Author."""
        author = Author(
            name="John Doe",
            email="john@example.com",
            commit_count=100,
            lines_added=5000,
            lines_deleted=1000,
        )
        assert author.name == "John Doe"
        assert author.email == "john@example.com"
        assert author.commit_count == 100


class TestCommit:
    """Test Commit dataclass."""

    def test_commit_creation(self):
        """Test creating a Commit."""
        commit = Commit(
            sha="abc123",
            message="Test commit",
            author="John Doe",
            author_email="john@example.com",
            timestamp=datetime.now(),
        )
        assert commit.sha == "abc123"
        assert commit.message == "Test commit"
        assert commit.lines_added == 0
        assert commit.lines_deleted == 0

    def test_commit_with_changes(self):
        """Test creating a Commit with changes."""
        commit = Commit(
            sha="abc123",
            message="Test commit",
            author="John Doe",
            author_email="john@example.com",
            timestamp=datetime.now(),
            lines_added=100,
            lines_deleted=50,
            files_changed=["src/main.py", "tests/test.py"],
            is_merge=False,
            is_revert=False,
        )
        assert len(commit.files_changed) == 2
        assert commit.lines_added == 100


class TestFileChange:
    """Test FileChange dataclass."""

    def test_file_change_creation(self):
        """Test creating a FileChange."""
        change = FileChange(
            filepath="src/main.py",
            lines_added=50,
            lines_deleted=10,
            change_type="M",
        )
        assert change.filepath == "src/main.py"
        assert change.lines_added == 50


class TestCommitAnalysis:
    """Test CommitAnalysis dataclass."""

    def test_commit_analysis_creation(self):
        """Test creating a CommitAnalysis."""
        analysis = CommitAnalysis(
            total_commits=100,
            unique_authors=5,
            commits_by_hour={"10:00": 10, "14:00": 15},
            commits_by_day={"Monday": 20, "Tuesday": 15},
            commits_by_week={"2024-W01": 50},
            top_authors=[],
            average_commits_per_day=3.3,
        )
        assert analysis.total_commits == 100
        assert analysis.unique_authors == 5


class TestCodeChurnAnalysis:
    """Test CodeChurnAnalysis dataclass."""

    def test_code_churn_analysis_creation(self):
        """Test creating a CodeChurnAnalysis."""
        analysis = CodeChurnAnalysis(
            total_lines_added=5000,
            total_lines_deleted=1000,
            net_change=4000,
            churn_by_file={},
            churn_by_author={},
            high_churn_commits=[],
            average_churn_per_commit=50.0,
        )
        assert analysis.total_lines_added == 5000
        assert analysis.net_change == 4000


class TestRiskyCommitAnalysis:
    """Test RiskyCommitAnalysis dataclass."""

    def test_risky_commit_analysis_creation(self):
        """Test creating a RiskyCommitAnalysis."""
        analysis = RiskyCommitAnalysis(
            total_risky_commits=10,
            large_change_commits=[],
            merge_commits=[],
            revert_commits=[],
            risk_score=5.5,
        )
        assert analysis.total_risky_commits == 10


class TestVelocityAnalysis:
    """Test VelocityAnalysis dataclass."""

    def test_velocity_analysis_creation(self):
        """Test creating a VelocityAnalysis."""
        analysis = VelocityAnalysis(
            commits_per_day=5.0,
            commits_per_week=35.0,
            commits_per_month=150.0,
            velocity_trend="stable",
            top_contributors=[],
            most_active_day="Monday",
            most_active_hour="10:00",
        )
        assert analysis.commits_per_day == 5.0
        assert analysis.velocity_trend == "stable"