# utils.py
import numpy as np
from pathlib import Path
from typing import List, Tuple, Optional
import torch
import config

def get_available_models() -> List[str]:
    """Lấy danh sách tất cả model trong folder models"""
    models_dir = Path(config.CONFIG['models_dir'])
    model_files = list(models_dir.glob("*.pth"))
    return sorted([f.name for f in model_files])

def validate_model_file(model_path: str) -> bool:
    """Kiểm tra xem file model có hợp lệ không"""
    path = Path(model_path)
    
    if not path.exists():
        return False
    
    if path.suffix != '.pth':
        return False
    
    if path.stat().st_size < 1000:  # File quá nhỏ
        return False
    
    return True

def format_time(seconds: float) -> str:
    """Format thời gian từ giây sang HH:MM:SS"""
    hours = int(seconds // 3600)
    minutes = int((seconds % 3600) // 60)
    secs = int(seconds % 60)
    
    if hours > 0:
        return f"{hours}h {minutes}m {secs}s"
    elif minutes > 0:
        return f"{minutes}m {secs}s"
    else:
        return f"{secs}s"

def get_color_for_value(color_val: int) -> str:
    """Lấy màu hex từ giá trị color"""
    return config.COLORS_MAP.get(color_val, '#ffffff')

def create_bottle_html(bottle_state: np.ndarray, bottle_idx: int, 
                       selected: bool = False) -> str:
    """Tạo HTML cho một chai"""
    border_color = '#FFD700' if selected else '#333'
    border_width = '3' if selected else '2'
    
    html = f'<div style="text-align: center; margin: 10px;">'
    html += f'<div style="width: 60px; height: 150px; border: {border_width}px solid {border_color}; '
    html += f'background: #f0f0f0; margin-bottom: 10px; display: flex; flex-direction: column-reverse; overflow: hidden;">'
    
    for height_idx in range(len(bottle_state)):
        color_val = int(bottle_state[height_idx])
        color = get_color_for_value(color_val)
        html += f'<div style="width: 100%; height: 30px; background: {color}; border-bottom: 1px solid #999;"></div>'
    
    html += '</div>'
    html += f'<p style="margin: 5px 0; font-weight: bold;">Chai {bottle_idx}</p>'
    html += '</div>'
    
    return html

def get_device() -> torch.device:
    """Lấy device (GPU hoặc CPU)"""
    device_config = config.MODEL_CONFIG['device']
    
    if device_config == 'auto':
        return torch.device('cuda' if torch.cuda.is_available() else 'cpu')
    elif device_config == 'cuda':
        if torch.cuda.is_available():
            return torch.device('cuda')
        else:
            print("Warning: CUDA not available, falling back to CPU")
            return torch.device('cpu')
    else:
        return torch.device('cpu')

def print_device_info():
    """In thông tin về device"""
    device = get_device()
    print(f"Device: {device}")
    
    if device.type == 'cuda':
        print(f"GPU Name: {torch.cuda.get_device_name(0)}")
        print(f"GPU Memory: {torch.cuda.get_device_properties(0).total_memory / 1e9:.1f} GB")