#!/usr/bin/env python3
# TODO: Consider removing when Kitty Graphics Addon is shipped.
"""
Minimal Kitty Graphics Protocol image sender.
Based on: https://sw.kovidgoyal.net/kitty/graphics-protocol/#a-minimal-example

Usage:
    ./send-png image.png           # Original size
    ./send-png image.png 10        # Scale to 10 columns wide
    ./send-png image.png 10 5      # Scale to 10 columns x 5 rows
"""
import sys
from base64 import standard_b64encode

def serialize_image(path):
    with open(path, 'rb') as f:
        data = f.read()
    return standard_b64encode(data).decode('ascii')

def write_chunked(data, columns=None, rows=None):
    # a=T means transmit and display
    # f=100 means PNG format
    # c=columns, r=rows for sizing
    params = 'a=T,f=100'
    if columns:
        params += f',c={columns}'
    if rows:
        params += f',r={rows}'
    sys.stdout.write(f'\x1b_G{params};{data}\x1b\\')
    sys.stdout.flush()

if __name__ == '__main__':
    if len(sys.argv) < 2:
        print("Usage: ./send-png <image.png> [columns] [rows]", file=sys.stderr)
        sys.exit(1)

    img_data = serialize_image(sys.argv[1])
    columns = int(sys.argv[2]) if len(sys.argv) > 2 else None
    rows = int(sys.argv[3]) if len(sys.argv) > 3 else None
    write_chunked(img_data, columns, rows)
    print()  # newline after the sequence