import os
import tempfile
import shutil
import pytest
from pathlib import Path
from typing import Generator
from repo_to_text.main import (
    get_tree_structure,
    load_ignore_specs,
    should_ignore_file,
    is_ignored_path,
    remove_empty_dirs,
    save_repo_to_text
)

@pytest.fixture
def temp_dir() -> Generator[str, None, None]:
    """Create a temporary directory for testing."""
    temp_path = tempfile.mkdtemp()
    yield temp_path
    shutil.rmtree(temp_path)

@pytest.fixture
def sample_repo(temp_dir: str) -> str:
    """Create a sample repository structure for testing."""
    # Create directories
    os.makedirs(os.path.join(temp_dir, "src"))
    os.makedirs(os.path.join(temp_dir, "tests"))
    
    # Create sample files
    files = {
        "README.md": "# Test Project",
        ".gitignore": """
*.pyc
__pycache__/
.git/
""",
        "src/main.py": "print('Hello World')",
        "tests/test_main.py": "def test_sample(): pass",
        ".repo-to-text-settings.yaml": """
gitignore-import-and-ignore: True
ignore-tree-and-content:
  - ".git/"
  - ".repo-to-text-settings.yaml"
ignore-content:
  - "README.md"
"""
    }
    
    for file_path, content in files.items():
        full_path = os.path.join(temp_dir, file_path)
        os.makedirs(os.path.dirname(full_path), exist_ok=True)
        with open(full_path, "w") as f:
            f.write(content)
    
    return temp_dir

def test_is_ignored_path() -> None:
    """Test the is_ignored_path function."""
    assert is_ignored_path(".git/config") is True
    assert is_ignored_path("repo-to-text_output.txt") is True
    assert is_ignored_path("src/main.py") is False
    assert is_ignored_path("normal_file.txt") is False

def test_load_ignore_specs(sample_repo: str) -> None:
    """Test loading ignore specifications from files."""
    gitignore_spec, content_ignore_spec, tree_and_content_ignore_spec = load_ignore_specs(sample_repo)
    
    assert gitignore_spec is not None
    assert content_ignore_spec is not None
    assert tree_and_content_ignore_spec is not None
    
    # Test gitignore patterns
    assert gitignore_spec.match_file("test.pyc") is True
    assert gitignore_spec.match_file("__pycache__/cache.py") is True
    assert gitignore_spec.match_file(".git/config") is True
    
    # Test content ignore patterns
    assert content_ignore_spec.match_file("README.md") is True
    
    # Test tree and content ignore patterns
    assert tree_and_content_ignore_spec.match_file(".git/config") is True

def test_should_ignore_file(sample_repo: str) -> None:
    """Test file ignoring logic."""
    gitignore_spec, content_ignore_spec, tree_and_content_ignore_spec = load_ignore_specs(sample_repo)
    
    # Test various file paths
    assert should_ignore_file(
        ".git/config",
        ".git/config",
        gitignore_spec,
        content_ignore_spec,
        tree_and_content_ignore_spec
    ) is True
    
    assert should_ignore_file(
        "src/main.py",
        "src/main.py",
        gitignore_spec,
        content_ignore_spec,
        tree_and_content_ignore_spec
    ) is False

def test_get_tree_structure(sample_repo: str) -> None:
    """Test tree structure generation."""
    gitignore_spec, _, tree_and_content_ignore_spec = load_ignore_specs(sample_repo)
    tree_output = get_tree_structure(sample_repo, gitignore_spec, tree_and_content_ignore_spec)
    
    # Basic structure checks
    assert "src" in tree_output
    assert "tests" in tree_output
    assert "main.py" in tree_output
    assert "test_main.py" in tree_output
    assert ".git" not in tree_output

def test_remove_empty_dirs(temp_dir: str) -> None:
    """Test removal of empty directories from tree output."""
    # Create test directory structure
    os.makedirs(os.path.join(temp_dir, "src"))
    os.makedirs(os.path.join(temp_dir, "empty_dir"))
    os.makedirs(os.path.join(temp_dir, "tests"))
    
    # Create some files
    with open(os.path.join(temp_dir, "src/main.py"), "w") as f:
        f.write("print('test')")
    with open(os.path.join(temp_dir, "tests/test_main.py"), "w") as f:
        f.write("def test(): pass")
    
    # Create a mock tree output that matches the actual tree command format
    tree_output = (
        f"{temp_dir}\n"
        f"├── {os.path.join(temp_dir, 'src')}\n"
        f"│   └── {os.path.join(temp_dir, 'src/main.py')}\n"
        f"├── {os.path.join(temp_dir, 'empty_dir')}\n"
        f"└── {os.path.join(temp_dir, 'tests')}\n"
        f"    └── {os.path.join(temp_dir, 'tests/test_main.py')}\n"
    )
    
    filtered_output = remove_empty_dirs(tree_output, temp_dir)
    
    # Check that empty_dir is removed but other directories remain
    assert "empty_dir" not in filtered_output
    assert os.path.join(temp_dir, "src") in filtered_output
    assert os.path.join(temp_dir, "tests") in filtered_output
    assert os.path.join(temp_dir, "src/main.py") in filtered_output
    assert os.path.join(temp_dir, "tests/test_main.py") in filtered_output

def test_save_repo_to_text(sample_repo: str) -> None:
    """Test the main save_repo_to_text function."""
    # Create output directory
    output_dir = os.path.join(sample_repo, "output")
    os.makedirs(output_dir, exist_ok=True)
    
    # Create .git directory to ensure it's properly ignored
    os.makedirs(os.path.join(sample_repo, ".git"))
    with open(os.path.join(sample_repo, ".git/config"), "w") as f:
        f.write("[core]\n\trepositoryformatversion = 0\n")
    
    # Test file output
    output_file = save_repo_to_text(sample_repo, output_dir=output_dir)
    assert os.path.exists(output_file)
    assert os.path.dirname(output_file) == output_dir
    
    # Check file contents
    with open(output_file, 'r') as f:
        content = f.read()
        
        # Basic content checks
        assert "Directory Structure:" in content
        
        # Check for expected files
        assert "src/main.py" in content
        assert "tests/test_main.py" in content
        
        # Check for file contents
        assert "print('Hello World')" in content
        assert "def test_sample(): pass" in content
        
        # Ensure ignored patterns are not in output
        assert ".git/config" not in content  # Check specific file
        assert "repo-to-text_" not in content
        assert ".repo-to-text-settings.yaml" not in content
        
        # Check that .gitignore content is not included
        assert "*.pyc" not in content
        assert "__pycache__" not in content

if __name__ == "__main__":
    pytest.main([__file__])