"""
Utility functions for data augmentation
"""
import os
import logging
from pathlib import Path
from typing import List, Tuple, Optional
import cv2
import numpy as np
from PIL import Image

def setup_logging(log_level: str = "INFO") -> logging.Logger:
    """Setup logging configuration"""
    logging.basicConfig(
        level=getattr(logging, log_level.upper()),
        format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
        handlers=[
            logging.FileHandler('data_augmentation.log'),
            logging.StreamHandler()
        ]
    )
    return logging.getLogger(__name__)

def get_image_files(directory: Path) -> List[Path]:
    """Get all image files from directory"""
    SUPPORTED_FORMATS = ['.jpg', '.jpeg', '.png', '.bmp', '.tiff']
    
    image_files = []
    if directory.exists():
        for ext in SUPPORTED_FORMATS:
            image_files.extend(directory.glob(f"*{ext}"))
            image_files.extend(directory.glob(f"*{ext.upper()}"))
    return sorted(image_files)



def load_image(image_path: Path, target_size: Tuple[int, int] = None) -> Optional[np.ndarray]:
    """Load and resize image"""
    try:
        # Load image using OpenCV
        image = cv2.imread(str(image_path))
        if image is None:
            return None
        # Convert BGR to RGB
        image = cv2.cvtColor(image, cv2.COLOR_BGR2RGB)
        # Resize if target_size is provided
        if target_size:
            image = cv2.resize(image, target_size, interpolation=cv2.INTER_AREA)
        return image
    except Exception as e:
        print(f"Error loading image {image_path}: {e}")
        return None

def save_image(image: np.ndarray, output_path: Path, quality: int = 95) -> bool:
    """Save image to file"""
    try:
        # Convert RGB to BGR for OpenCV
        image_bgr = cv2.cvtColor(image, cv2.COLOR_RGB2BGR)
        
        # Create output directory if it doesn't exist
        output_path.parent.mkdir(parents=True, exist_ok=True)
        
        # Save image
        cv2.imwrite(str(output_path), image_bgr, [cv2.IMWRITE_JPEG_QUALITY, quality])
        return True
    except Exception as e:
        print(f"Error saving image {output_path}: {e}")
        return False

def create_augmented_filename(original_path: Path, index: int, method: str = "aug") -> Path:
    """Create filename for augmented image with method name"""
    stem = original_path.stem
    suffix = f"_{method}_{index:02d}"
    return original_path.parent / f"{stem}{suffix}{original_path.suffix}"



def print_progress(current: int, total: int, prefix: str = "Progress"):
    """Print progress bar"""
    bar_length = 50
    filled_length = int(round(bar_length * current / float(total)))
    percents = round(100.0 * current / float(total), 1)
    bar = '=' * filled_length + '-' * (bar_length - filled_length)
    print(f'\r{prefix}: [{bar}] {percents}% ({current}/{total})', end='')
    if current == total:
        print()