#!/usr/bin/env python3
"""
Tests for codebase_scraper.py - Standalone codebase analysis CLI.

Test Coverage:
- Language detection
- Directory exclusion
- File walking
- .gitignore loading
"""

import os
import shutil
import sys
import tempfile
import unittest
from pathlib import Path

# Add src to path
sys.path.insert(0, os.path.join(os.path.dirname(__file__), "..", "src"))

from skill_seekers.cli.codebase_scraper import (
    DEFAULT_EXCLUDED_DIRS,
    detect_language,
    load_gitignore,
    should_exclude_dir,
    walk_directory,
)


class TestLanguageDetection(unittest.TestCase):
    """Tests for language detection from file extensions"""

    def test_python_detection(self):
        """Test Python file detection."""
        self.assertEqual(detect_language(Path("test.py")), "Python")

    def test_javascript_detection(self):
        """Test JavaScript file detection."""
        self.assertEqual(detect_language(Path("test.js")), "JavaScript")
        self.assertEqual(detect_language(Path("test.jsx")), "JavaScript")

    def test_typescript_detection(self):
        """Test TypeScript file detection."""
        self.assertEqual(detect_language(Path("test.ts")), "TypeScript")
        self.assertEqual(detect_language(Path("test.tsx")), "TypeScript")

    def test_cpp_detection(self):
        """Test C++ file detection."""
        self.assertEqual(detect_language(Path("test.cpp")), "C++")
        self.assertEqual(detect_language(Path("test.h")), "C++")
        self.assertEqual(detect_language(Path("test.hpp")), "C++")

    def test_csharp_detection(self):
        """Test C# file detection."""
        self.assertEqual(detect_language(Path("test.cs")), "C#")

    def test_go_detection(self):
        """Test Go file detection."""
        self.assertEqual(detect_language(Path("test.go")), "Go")

    def test_rust_detection(self):
        """Test Rust file detection."""
        self.assertEqual(detect_language(Path("test.rs")), "Rust")

    def test_java_detection(self):
        """Test Java file detection."""
        self.assertEqual(detect_language(Path("test.java")), "Java")

    def test_ruby_detection(self):
        """Test Ruby file detection."""
        self.assertEqual(detect_language(Path("test.rb")), "Ruby")

    def test_php_detection(self):
        """Test PHP file detection."""
        self.assertEqual(detect_language(Path("test.php")), "PHP")

    def test_unknown_language(self):
        """Test unknown file extension."""
        self.assertEqual(detect_language(Path("test.swift")), "Unknown")
        self.assertEqual(detect_language(Path("test.txt")), "Unknown")


class TestDirectoryExclusion(unittest.TestCase):
    """Tests for directory exclusion logic"""

    def test_node_modules_excluded(self):
        """Test that node_modules is excluded."""
        self.assertTrue(should_exclude_dir("node_modules", DEFAULT_EXCLUDED_DIRS))

    def test_venv_excluded(self):
        """Test that venv is excluded."""
        self.assertTrue(should_exclude_dir("venv", DEFAULT_EXCLUDED_DIRS))

    def test_git_excluded(self):
        """Test that .git is excluded."""
        self.assertTrue(should_exclude_dir(".git", DEFAULT_EXCLUDED_DIRS))

    def test_normal_dir_not_excluded(self):
        """Test that normal directories are not excluded."""
        self.assertFalse(should_exclude_dir("src", DEFAULT_EXCLUDED_DIRS))
        self.assertFalse(should_exclude_dir("tests", DEFAULT_EXCLUDED_DIRS))


class TestDirectoryWalking(unittest.TestCase):
    """Tests for directory walking functionality"""

    def setUp(self):
        """Set up test environment"""
        self.temp_dir = tempfile.mkdtemp()
        self.root = Path(self.temp_dir)

    def tearDown(self):
        """Clean up test environment"""
        shutil.rmtree(self.temp_dir, ignore_errors=True)

    def test_walk_empty_directory(self):
        """Test walking empty directory."""
        files = walk_directory(self.root)
        self.assertEqual(len(files), 0)

    def test_walk_with_python_files(self):
        """Test walking directory with Python files."""
        # Create test files
        (self.root / "test1.py").write_text('print("test")')
        (self.root / "test2.py").write_text('print("test2")')
        (self.root / "readme.txt").write_text("readme")

        files = walk_directory(self.root)

        # Should only find Python files
        self.assertEqual(len(files), 2)
        self.assertTrue(all(f.suffix == ".py" for f in files))

    def test_walk_excludes_node_modules(self):
        """Test that node_modules directory is excluded."""
        # Create test files
        (self.root / "test.py").write_text("test")

        # Create node_modules with files
        node_modules = self.root / "node_modules"
        node_modules.mkdir()
        (node_modules / "package.js").write_text("test")

        files = walk_directory(self.root)

        # Should only find root test.py, not package.js
        self.assertEqual(len(files), 1)
        self.assertEqual(files[0].name, "test.py")

    def test_walk_with_subdirectories(self):
        """Test walking nested directory structure."""
        # Create nested structure
        src_dir = self.root / "src"
        src_dir.mkdir()
        (src_dir / "module.py").write_text("test")

        tests_dir = self.root / "tests"
        tests_dir.mkdir()
        (tests_dir / "test_module.py").write_text("test")

        files = walk_directory(self.root)

        # Should find both files
        self.assertEqual(len(files), 2)
        filenames = [f.name for f in files]
        self.assertIn("module.py", filenames)
        self.assertIn("test_module.py", filenames)


class TestGitignoreLoading(unittest.TestCase):
    """Tests for .gitignore loading"""

    def setUp(self):
        """Set up test environment"""
        self.temp_dir = tempfile.mkdtemp()
        self.root = Path(self.temp_dir)

    def tearDown(self):
        """Clean up test environment"""
        shutil.rmtree(self.temp_dir, ignore_errors=True)

    def test_no_gitignore(self):
        """Test behavior when no .gitignore exists."""
        spec = load_gitignore(self.root)
        # Should return None when no .gitignore found
        self.assertIsNone(spec)

    def test_load_gitignore(self):
        """Test loading valid .gitignore file."""
        # Create .gitignore
        gitignore_path = self.root / ".gitignore"
        gitignore_path.write_text("*.log\ntemp/\n")

        spec = load_gitignore(self.root)

        # Should successfully load pathspec (if pathspec is installed)
        # If pathspec is not installed, spec will be None
        if spec is not None:
            # Verify it's a PathSpec object
            self.assertIsNotNone(spec)


if __name__ == "__main__":
    # Run tests with verbose output
    unittest.main(verbosity=2)