import * as photon from "@cf-wasm/photon";
import * as png from "@cf-wasm/png";

const worker = {
    async fetch() {
        const imageUrl = "https://avatars.githubusercontent.com/u/314135";

        const imageBuffer = await fetch(imageUrl).then((res) => res.arrayBuffer());
        const imageBytes = new Uint8Array(imageBuffer);

        const inputImage = photon.PhotonImage.new_from_byteslice(imageBytes);

        // resizing using photon
        const outputImage = photon.resize(
            inputImage,
            inputImage.get_width() * 0.5,
            inputImage.get_height() * 0.5,
            1
        );

        // encoding using png
        const outputPng = png.encode(
            outputImage.get_raw_pixels(),
            outputImage.get_width(),
            outputImage.get_height()
        );

        const imageResponse = new Response(outputPng, {
            headers: {
                "Content-Type": "image/png"
            }
        });

        inputImage.free();
        outputImage.free();

        return imageResponse;
    }
};

export default worker;