#!/usr/bin/env python3
"""Generate a C++ header that embeds an image file as a byte array.

Usage: icon_to_header.py INPUT_IMAGE OUTPUT_HEADER
"""

import sys


def main() -> int:
    if len(sys.argv) != 3:
        print(f"usage: {sys.argv[0]} INPUT_IMAGE OUTPUT_HEADER", file=sys.stderr)
        return 2

    with open(sys.argv[1], "rb") as src:
        data = src.read()

    words = ", ".join(f"0x{byte:02x}" for byte in data)
    header = f"""// GENERATED FILE - do not edit by hand.
// Produced by scripts/icon_to_header.py from screencast_icon/screencast_256.png.

#pragma once

#include <array>
#include <cstdint>

namespace sc {{
inline constexpr std::array<std::uint8_t, {len(data)}> app_icon_png = {{
    {words}
}};
}}  // namespace sc
"""
    with open(sys.argv[2], "w") as dst:
        dst.write(header)
    return 0


if __name__ == "__main__":
    sys.exit(main())