import subprocess
import tempfile
from pathlib import Path

from aider_gitea import contains_only_ruff_changes


class TestContainsOnlyRuffChanges:
    """Test the contains_only_ruff_changes function."""

    def setup_test_repo(self) -> Path:
        """Create a test git repository."""
        temp_dir = Path(tempfile.mkdtemp())

        # Initialize git repo
        subprocess.run(['git', 'init'], cwd=temp_dir, check=True)
        subprocess.run(
            ['git', 'config', 'user.name', 'Test User'],
            cwd=temp_dir,
            check=True,
        )
        subprocess.run(
            ['git', 'config', 'user.email', 'test@example.com'],
            cwd=temp_dir,
            check=True,
        )

        # Create initial content and commit
        test_file = temp_dir / 'test.py'
        test_file.write_text('def hello():\n    print("hello")\n')
        subprocess.run(['git', 'add', '.'], cwd=temp_dir, check=True)
        subprocess.run(
            ['git', 'commit', '-m', 'Initial commit'],
            cwd=temp_dir,
            check=True,
        )

        # Rename master to main for consistency
        subprocess.run(
            ['git', 'branch', '-m', 'master', 'main'],
            cwd=temp_dir,
            check=True,
        )

        return temp_dir

    def test_no_commits_returns_true(self):
        """Test that branches with no commits return True."""
        temp_dir = self.setup_test_repo()

        # Create a new branch but don't commit anything
        subprocess.run(
            ['git', 'checkout', '-b', 'test-branch'],
            cwd=temp_dir,
            check=True,
        )

        result = contains_only_ruff_changes(temp_dir, 'main', 'test-branch')
        assert result is True

    def test_only_ruff_commits_returns_true(self):
        """Test that branches with only ruff-related commits return True."""
        temp_dir = self.setup_test_repo()

        # Create a new branch and make ruff-related commits
        subprocess.run(
            ['git', 'checkout', '-b', 'test-branch'],
            cwd=temp_dir,
            check=True,
        )

        # Modify the file with formatting changes
        test_file = temp_dir / 'test.py'
        test_file.write_text('def hello():\n    print("hello")\n\n')  # Added newline
        subprocess.run(['git', 'add', '.'], cwd=temp_dir, check=True)
        subprocess.run(
            ['git', 'commit', '-m', 'ruff format changes'],
            cwd=temp_dir,
            check=True,
        )

        # Another ruff commit
        test_file.write_text(
            'def hello():\n    print("hello")\n',
        )  # Removed newline again
        subprocess.run(['git', 'add', '.'], cwd=temp_dir, check=True)
        subprocess.run(
            ['git', 'commit', '-m', 'auto-fix lint issues'],
            cwd=temp_dir,
            check=True,
        )

        result = contains_only_ruff_changes(temp_dir, 'main', 'test-branch')
        assert result is True

    def test_substantive_changes_returns_false(self):
        """Test that branches with substantive changes return False."""
        temp_dir = self.setup_test_repo()

        # Create a new branch and make substantive changes
        subprocess.run(
            ['git', 'checkout', '-b', 'test-branch'],
            cwd=temp_dir,
            check=True,
        )

        # Add a new function (substantive change)
        test_file = temp_dir / 'test.py'
        test_file.write_text(
            'def hello():\n    print("hello")\n\ndef goodbye():\n    print("goodbye")\n',
        )
        subprocess.run(['git', 'add', '.'], cwd=temp_dir, check=True)
        subprocess.run(
            ['git', 'commit', '-m', 'Add goodbye function'],
            cwd=temp_dir,
            check=True,
        )

        result = contains_only_ruff_changes(temp_dir, 'main', 'test-branch')
        assert result is False

    def test_mixed_commits_returns_false(self):
        """Test that branches with both ruff and substantive commits return False."""
        temp_dir = self.setup_test_repo()

        # Create a new branch
        subprocess.run(
            ['git', 'checkout', '-b', 'test-branch'],
            cwd=temp_dir,
            check=True,
        )

        # First, a substantive change
        test_file = temp_dir / 'test.py'
        test_file.write_text(
            'def hello():\n    print("hello world")\n',
        )  # Changed string
        subprocess.run(['git', 'add', '.'], cwd=temp_dir, check=True)
        subprocess.run(
            ['git', 'commit', '-m', 'Update greeting message'],
            cwd=temp_dir,
            check=True,
        )

        # Then, a ruff change
        test_file.write_text(
            'def hello():\n    print("hello world")\n\n',
        )  # Added newline
        subprocess.run(['git', 'add', '.'], cwd=temp_dir, check=True)
        subprocess.run(['git', 'commit', '-m', 'ruff format'], cwd=temp_dir, check=True)

        result = contains_only_ruff_changes(temp_dir, 'main', 'test-branch')
        assert result is False

    def test_ruff_keywords_in_commit_messages(self):
        """Test various ruff-related keywords in commit messages."""
        temp_dir = self.setup_test_repo()

        ruff_messages = [
            'ruff format',
            'Ruff after aider',
            'auto-fix lint issues',
            'code style formatting',
            'Apply formatting changes',
            'Lint fixes',
        ]

        for i, message in enumerate(ruff_messages):
            # Create a branch for each test
            branch_name = f'test-branch-{i}'
            subprocess.run(['git', 'checkout', 'main'], cwd=temp_dir, check=True)
            subprocess.run(
                ['git', 'checkout', '-b', branch_name],
                cwd=temp_dir,
                check=True,
            )

            # Make a minor formatting change that's always different
            test_file = temp_dir / 'test.py'
            content = test_file.read_text()
            # Add a unique comment to make each change different
            content += f'# formatting change {i}\n'
            test_file.write_text(content)

            subprocess.run(['git', 'add', '.'], cwd=temp_dir, check=True)
            subprocess.run(['git', 'commit', '-m', message], cwd=temp_dir, check=True)

            result = contains_only_ruff_changes(temp_dir, 'main', branch_name)
            assert result is True, f'Failed for message: {message}'