#!/usr/bin/env python3
"""
Demo script showing the comprehensive directory tree JSON output capabilities
"""

import asyncio
import json
import tempfile
from pathlib import Path

from enhanced_mcp.file_operations import EnhancedFileOperations


async def demo_directory_tree_json():
    """Demonstrate the comprehensive JSON directory tree functionality"""

    print("🌳 Enhanced MCP Tools - Directory Tree JSON Demo")
    print("=" * 60)

    # Initialize the file operations class
    file_ops = EnhancedFileOperations()

    # Create a sample directory structure for demo
    with tempfile.TemporaryDirectory() as temp_dir:
        temp_path = Path(temp_dir)
        print(f"📁 Demo directory: {temp_path}")

        # Create sample structure
        (temp_path / "src").mkdir()
        (temp_path / "src" / "main.py").write_text(
            """#!/usr/bin/env python3
def main():
    print("Hello, World!")

if __name__ == "__main__":
    main()
"""
        )

        (temp_path / "src" / "utils.py").write_text(
            """def helper_function():
    return "This is a helper"
"""
        )

        (temp_path / "docs").mkdir()
        (temp_path / "docs" / "README.md").write_text(
            "# Project Documentation\n\nThis is the main documentation."
        )
        (temp_path / "docs" / "api.md").write_text("# API Reference\n\nAPI documentation here.")

        (temp_path / "config").mkdir()
        (temp_path / "config" / "settings.json").write_text('{"debug": true, "version": "1.0.0"}')

        # Hidden file
        (temp_path / ".gitignore").write_text("*.pyc\n__pycache__/\n.env\n")

        # Large file
        (temp_path / "large_file.txt").write_text("X" * 10000)  # 10KB file

        print("📋 Created sample project structure")

        # Demonstrate different scanning modes
        demos = [
            {
                "name": "Complete Metadata Scan",
                "params": {
                    "root_path": str(temp_path),
                    "include_hidden": True,
                    "include_metadata": True,
                    "exclude_patterns": None,
                },
            },
            {
                "name": "Production-Ready Scan",
                "params": {
                    "root_path": str(temp_path),
                    "include_hidden": False,
                    "include_metadata": True,
                    "exclude_patterns": ["*.pyc", "__pycache__", ".env"],
                    "max_depth": 3,
                },
            },
            {
                "name": "Large Files Only",
                "params": {
                    "root_path": str(temp_path),
                    "include_hidden": False,
                    "include_metadata": True,
                    "size_threshold_mb": 0.005,  # 5KB threshold
                },
            },
            {
                "name": "Minimal Structure",
                "params": {
                    "root_path": str(temp_path),
                    "include_hidden": False,
                    "include_metadata": False,
                    "max_depth": 2,
                },
            },
        ]

        for demo in demos:
            print(f"\n=== {demo['name']} ===")

            result = await file_ops.list_directory_tree(**demo["params"])

            if "error" in result:
                print(f"❌ Error: {result['error']}")
                continue

            print("✅ Scan completed successfully")
            print(f"📊 Summary: {result['summary']['total_items']} items found")

            # Show JSON structure sample
            print("📄 JSON Output Structure:")

            # Pretty print the result with limited depth to avoid overwhelming output
            def limit_json_depth(obj, max_depth=2, current_depth=0):
                """Limit JSON depth for display purposes"""
                if current_depth >= max_depth:
                    if isinstance(obj, dict):
                        return {"...": "truncated"}
                    elif isinstance(obj, list):
                        return ["...truncated..."]
                    else:
                        return obj

                if isinstance(obj, dict):
                    return {
                        k: limit_json_depth(v, max_depth, current_depth + 1) for k, v in obj.items()
                    }
                elif isinstance(obj, list):
                    return [
                        limit_json_depth(item, max_depth, current_depth + 1) for item in obj[:3]
                    ] + (["...more..."] if len(obj) > 3 else [])
                else:
                    return obj

            limited_result = limit_json_depth(result, max_depth=3)
            print(json.dumps(limited_result, indent=2))

        # Demonstrate real-world usage examples
        print("\n=== Real-World Usage Examples ===")

        # Example 1: Find all Python files
        print("\n🐍 Finding all Python files:")
        python_scan = await file_ops.list_directory_tree(
            root_path=str(temp_path),
            include_hidden=False,
            include_metadata=True,
            exclude_patterns=["*.pyc", "__pycache__"],
        )

        def find_files_by_extension(node, extension, files=None):
            if files is None:
                files = []

            if node["type"] == "file" and node["name"].endswith(extension):
                files.append(
                    {
                        "path": node["path"],
                        "size": node.get("size_human", "unknown"),
                        "modified": node.get("modified_iso", "unknown"),
                    }
                )

            if "children" in node:
                for child in node["children"]:
                    find_files_by_extension(child, extension, files)

            return files

        python_files = find_files_by_extension(python_scan["tree"], ".py")
        for py_file in python_files:
            print(
                f"   📄 {py_file['path']} ({py_file['size']}) - Modified: {py_file['modified'][:10]}"
            )

        # Example 2: Calculate directory sizes
        print("\n📊 Directory sizes:")
        size_scan = await file_ops.list_directory_tree(
            root_path=str(temp_path), include_metadata=True
        )

        def get_directory_sizes(node, sizes=None):
            if sizes is None:
                sizes = {}

            if node["type"] == "directory":
                total_size = node.get("total_size_bytes", 0)
                sizes[node["name"]] = {
                    "size_bytes": total_size,
                    "size_human": node.get("total_size_human", "0 B"),
                    "child_count": node.get("child_count", 0),
                }

            if "children" in node:
                for child in node["children"]:
                    get_directory_sizes(child, sizes)

            return sizes

        dir_sizes = get_directory_sizes(size_scan["tree"])
        for dir_name, info in dir_sizes.items():
            print(f"   📁 {dir_name}: {info['size_human']} ({info['child_count']} items)")

        # Example 3: Export to JSON file
        print("\n💾 Exporting complete structure to JSON file:")
        output_file = temp_path / "directory_structure.json"

        complete_scan = await file_ops.list_directory_tree(
            root_path=str(temp_path), include_hidden=True, include_metadata=True
        )

        with open(output_file, "w") as f:
            json.dump(complete_scan, f, indent=2)

        print(f"   ✅ Exported to: {output_file}")
        print(f"   📊 File size: {output_file.stat().st_size} bytes")

        # Verify the exported file
        with open(output_file) as f:
            imported_data = json.load(f)
            print(
                f"   ✅ Verification: {imported_data['summary']['total_items']} items in exported JSON"
            )

        print("\n🎯 Use Cases Demonstrated:")
        print("   • 📁 Complete directory metadata collection")
        print("   • 🔍 File filtering and search capabilities")
        print("   • 📊 Directory size analysis")
        print("   • 💾 JSON export for external tools")
        print("   • 🚀 Integration with build/CI systems")
        print("   • 📈 Project analysis and reporting")

        print("\n🎉 Directory Tree JSON Demo completed!")
        print("✅ Ready for production use with comprehensive metadata!")


if __name__ == "__main__":
    asyncio.run(demo_directory_tree_json())