"""
Utility Functions Module
Common helper functions used across the application.
"""
from pathlib import Path
from datetime import datetime


def format_size(size: int) -> str:
    """Format bytes to human readable string"""
    for unit in ['B', 'KB', 'MB', 'GB', 'TB']:
        if size < 1024:
            return f"{size:.1f} {unit}"
        size /= 1024
    return f"{size:.1f} PB"


def get_file_icon(name: str, is_dir: bool = False) -> str:
    """Get emoji icon for file type"""
    if is_dir:
        return "📁"
    ext = Path(name).suffix.lower()
    icons = {
        '.txt': '📄', '.md': '📝', '.pdf': '📕', '.doc': '📘', '.csv': '📊',
        '.py': '🐍', '.js': '📜', '.json': '📋', '.html': '🌐', '.css': '🎨',
        '.jpg': '🖼️', '.jpeg': '🖼️', '.png': '🖼️', '.gif': '🖼️', '.svg': '🖼️',
        '.mp3': '🎵', '.wav': '🎵', '.mp4': '🎬', '.avi': '🎬',
        '.zip': '📦', '.tar': '📦', '.gz': '📦',
        '.pt': '🧠', '.pth': '🧠', '.safetensors': '🧠', '.ckpt': '🧠', '.bin': '🧠',
        '.env': '🔐', '.log': '📜', '.sh': '🖥️',
    }
    return icons.get(ext, '📄')


def get_mime_type(name: str) -> str:
    """Get mime type category for file"""
    ext = Path(name).suffix.lower()
    if ext in ['.jpg', '.jpeg', '.png', '.gif', '.svg', '.webp']:
        return 'image'
    if ext in ['.txt', '.md', '.py', '.js', '.json', '.html', '.css', '.yaml', '.yml', '.sh', '.log', '.csv']:
        return 'text'
    return 'binary'


def format_timestamp(ts: float) -> str:
    """Format unix timestamp to string"""
    return datetime.fromtimestamp(ts).strftime("%Y-%m-%d %H:%M")