#!/usr/bin/env python3
"""
Generate placeholder icons for the GallerySubscriber extension.
Run this script from the extension directory.

Requirements: Pillow (pip install Pillow)
"""

import os
from pathlib import Path

try:
    from PIL import Image, ImageDraw
except ImportError:
    print("Pillow not installed. Install with: pip install Pillow")
    print("Or manually create icon-16.png, icon-32.png, icon-48.png, icon-128.png")
    exit(1)

# Icon configuration
BACKGROUND_COLOR = '#1976d2'  # Primary blue
SIZES = [16, 32, 48, 128]

def create_icon(size):
    """Create a simple colored square icon with rounded corners effect."""
    img = Image.new('RGBA', (size, size), (0, 0, 0, 0))
    draw = ImageDraw.Draw(img)

    # Draw filled rounded rectangle (approximated with circle corners for small sizes)
    margin = max(1, size // 16)
    radius = max(2, size // 8)

    # For simplicity, just draw a solid square with the primary color
    draw.rectangle([margin, margin, size - margin - 1, size - margin - 1],
                   fill=BACKGROUND_COLOR)

    # Draw a simple "G" or download arrow for larger sizes
    if size >= 32:
        # Draw a simple download arrow
        center_x = size // 2
        center_y = size // 2
        arrow_size = size // 3

        # Arrow body (vertical line)
        line_width = max(2, size // 12)
        draw.rectangle([
            center_x - line_width // 2,
            center_y - arrow_size // 2,
            center_x + line_width // 2,
            center_y + arrow_size // 4
        ], fill='white')

        # Arrow head (triangle pointing down)
        head_size = arrow_size // 2
        draw.polygon([
            (center_x - head_size, center_y),
            (center_x + head_size, center_y),
            (center_x, center_y + head_size)
        ], fill='white')

        # Base line
        draw.rectangle([
            center_x - arrow_size // 2,
            center_y + arrow_size // 2,
            center_x + arrow_size // 2,
            center_y + arrow_size // 2 + line_width
        ], fill='white')

    return img

def main():
    icons_dir = Path(__file__).parent / 'icons'
    icons_dir.mkdir(exist_ok=True)

    for size in SIZES:
        icon = create_icon(size)
        output_path = icons_dir / f'icon-{size}.png'
        icon.save(output_path, 'PNG')
        print(f'Created {output_path}')

    print('\nDone! Icons created successfully.')
    print('You can replace these with custom icons later.')

if __name__ == '__main__':
    main()