"""Tests for the Git handler module."""

import os
from pathlib import Path
from unittest.mock import MagicMock

import pytest
from git.exc import GitCommandError

from git_commit_ai.core.git_handler import GitHandler, GitError, get_git_handler


class TestGitHandlerBasic:
    """Basic Git handler tests."""

    def test_is_repository_true(self, temp_git_repo):
        """Test is_repository returns True for git repo."""
        handler = GitHandler(str(temp_git_repo))
        assert handler.is_repository() is True

    def test_is_repository_false(self, tmp_path):
        """Test is_repository returns False for non-git directory."""
        handler = GitHandler(str(tmp_path))
        assert handler.is_repository() is False


class TestGitHandlerStagedChanges:
    """Tests for staged changes functionality."""

    def test_is_staged_true(self, temp_git_repo):
        """Test is_staged returns True when changes are staged."""
        handler = GitHandler(str(temp_git_repo))

        test_file = temp_git_repo / "test.py"
        test_file.write_text("print('test')")
        os.system(f"git add {test_file}")

        assert handler.is_staged() is True

    def test_get_staged_changes(self, temp_git_repo):
        """Test getting staged changes."""
        handler = GitHandler(str(temp_git_repo))

        test_file = temp_git_repo / "test.py"
        test_file.write_text("print('test')")
        os.system(f"git add {test_file}")

        diff = handler.get_staged_changes()
        assert diff != ""
        assert "test.py" in diff


class TestGitHandlerCommitHistory:
    """Tests for commit history functionality."""

    def test_get_commit_history(self, temp_git_repo):
        """Test getting commit history."""
        handler = GitHandler(str(temp_git_repo))
        commits = handler.get_commit_history(max_commits=5)

        assert len(commits) >= 1
        assert any(c["message"] == "Initial commit" for c in commits)

    def test_get_commit_history_conventional_only(self, temp_git_repo):
        """Test getting only conventional commits."""
        handler = GitHandler(str(temp_git_repo))
        commits = handler.get_commit_history(max_commits=10, conventional_only=True)

        for commit in commits:
            assert commit["type"] != "unknown"


class TestGitHandlerLanguageDetection:
    """Tests for language detection functionality."""

    def test_get_changed_languages_python(self, temp_git_repo):
        """Test detecting Python files."""
        handler = GitHandler(str(temp_git_repo))

        test_file = temp_git_repo / "test.py"
        test_file.write_text("print('hello')")
        os.system(f"git add {test_file}")

        languages = handler.get_changed_languages()
        assert "Python" in languages

    def test_get_changed_languages_multiple(self, temp_git_repo):
        """Test detecting multiple languages."""
        handler = GitHandler(str(temp_git_repo))

        py_file = temp_git_repo / "test.py"
        py_file.write_text("print('hello')")
        js_file = temp_git_repo / "test.js"
        js_file.write_text("console.log('hello')")

        os.system(f"git add {py_file} {js_file}")

        languages = handler.get_changed_languages()
        assert "Python" in languages
        assert "JavaScript" in languages


class TestGitHandlerHelpers:
    """Tests for helper methods."""

    def test_get_staged_files(self, temp_git_repo):
        """Test getting staged files list."""
        handler = GitHandler(str(temp_git_repo))

        test_file = temp_git_repo / "test.py"
        test_file.write_text("print('test')")
        os.system(f"git add {test_file}")

        files = handler.get_staged_files()
        assert "test.py" in [f for f in files if "test.py" in f]

    def test_get_diff_summary(self, temp_git_repo):
        """Test getting diff summary."""
        handler = GitHandler(str(temp_git_repo))

        test_file = temp_git_repo / "test.py"
        test_file.write_text("print('test')")
        os.system(f"git add {test_file}")

        summary = handler.get_diff_summary()
        assert "Files changed" in summary
        assert "Python" in summary


class TestGitError:
    """Tests for GitError exception."""

    def test_git_error_raised(self):
        """Test GitError is raised on git errors."""
        with pytest.raises(GitError):
            handler = GitHandler("/nonexistent/path")
            handler.repo