"""
Batch Processing for VintageGAN
Specification Reference: Day 14

Process multiple images in a folder with vintage effects.

Author: VintageGAN Project
Date: 2024
"""

import argparse
from pathlib import Path
from tqdm import tqdm
import sys

sys.path.insert(0, str(Path(__file__).parent.parent))

from inference.apply_filter import VintageFilter


def process_folder(
    input_dir: str,
    output_dir: str,
    checkpoint: str,
    conditions: str = "soft_fade",
    extensions: tuple = (".jpg", ".jpeg", ".png"),
    device: str = "cuda",
    image_size: int = 256,
):
    """
    Process all images in a folder.

    Args:
        input_dir: Input directory
        output_dir: Output directory
        checkpoint: Generator checkpoint path
        conditions: Condition preset or custom values
        extensions: Image file extensions to process
        device: Device to use
    """
    input_path = Path(input_dir)
    output_path = Path(output_dir)
    output_path.mkdir(parents=True, exist_ok=True)

    # Find all images
    image_files = []
    for ext in extensions:
        image_files.extend(input_path.glob(f"*{ext}"))
        image_files.extend(input_path.glob(f"*{ext.upper()}"))

    if len(image_files) == 0:
        print(f"No images found in {input_dir}")
        return

    print(f"Found {len(image_files)} images")

    # Initialize filter
    print("Loading model...")
    filter = VintageFilter(checkpoint=checkpoint, device=device, image_size=image_size)

    # Process images
    print(f"\nProcessing with preset: {conditions}")
    for img_path in tqdm(image_files, desc="Processing"):
        try:
            # Apply filter
            output = filter.apply(img_path, conditions)

            # Save with same filename
            output_file = output_path / img_path.name
            output.save(output_file, quality=95)

        except Exception as e:
            print(f"\nError processing {img_path.name}: {e}")
            continue

    print(f"\n✓ Processed {len(image_files)} images")
    print(f"✓ Saved to: {output_dir}")


def main():
    """Command-line interface for batch processing."""
    parser = argparse.ArgumentParser(description="Batch process images with VintageGAN")
    parser.add_argument("input_dir", type=str, help="Input directory")
    parser.add_argument("output_dir", type=str, help="Output directory")
    parser.add_argument(
        "--checkpoint", type=str, required=True, help="Path to generator checkpoint"
    )
    parser.add_argument(
        "--preset", type=str, default="soft_fade", help="Preset condition name"
    )
    parser.add_argument(
        "--device",
        type=str,
        default="cuda" if __import__("torch").cuda.is_available() else "cpu",
    )
    parser.add_argument("--image-size", type=int, default=256)

    args = parser.parse_args()

    print("=" * 60)
    print("VINTAGEGAN BATCH PROCESSING")
    print("=" * 60)

    process_folder(
        args.input_dir,
        args.output_dir,
        args.checkpoint,
        args.preset,
        device=args.device,
        image_size=args.image_size,
    )

    print("=" * 60)


if __name__ == "__main__":
    main()