import os
import sys
import argparse
from tree_structurer import create_tree_structurer, get_structure

def main():
    parser = argparse.ArgumentParser(description='Display directory structure in a tree-like format')
    parser.add_argument('path', nargs='?', default=os.getcwd(),
                       help='Path to analyze (default: current directory)')
    parser.add_argument('-v', '--verbose', action='store_true',
                       help='Show more detailed output')
    args = parser.parse_args()

    try:
        if args.verbose:
            print(f"Analyzing directory: {args.path}")
        
        create_tree_structurer()
        structure = get_structure(args.path)
                    
        for line in structure:
            print(line)
            
    except Exception as e:
        error_msg = str(e)
        if "Directory does not exist" in error_msg:
            print(f"Error: The specified directory does not exist: {args.path}", file=sys.stderr)
        elif "Directory is empty" in error_msg:
            print(f"Error: The specified directory is empty: {args.path}", file=sys.stderr)
        elif "Path is not a directory" in error_msg:
            print(f"Error: The specified path is not a directory: {args.path}", file=sys.stderr)
        else:
            print(f"Error: {error_msg}", file=sys.stderr)
        sys.exit(1)
if __name__ == "__main__":
    main()