// The packager's native-target proof module (ADR 0049). Its backend uses sharp, a native dependency,
// so it packages only for a native target. It is plain JavaScript and needs no build step.
import { defineModuleRuntime } from "@ekklesia/module-sdk";
import sharp from "sharp";

/** A deterministic image operation: a 4×4 solid red image resized to 2×2, returned as raw pixels,
 * and the same image encoded as PNG and decoded again. */
export async function proof() {
  const resized = await sharp({
    create: { background: { b: 0, g: 0, r: 255 }, channels: 3, height: 4, width: 4 },
  })
    .resize(2, 2)
    .raw()
    .toBuffer({ resolveWithObject: true });
  const png = await sharp({
    create: { background: { b: 255, g: 0, r: 0 }, channels: 3, height: 3, width: 5 },
  })
    .png()
    .toBuffer();
  const decoded = await sharp(png).metadata();
  return {
    pixels: [...resized.data],
    png: { format: decoded.format, height: decoded.height, width: decoded.width },
    resized: {
      channels: resized.info.channels,
      height: resized.info.height,
      width: resized.info.width,
    },
  };
}

export default defineModuleRuntime({
  database: { abi: 1 },
  id: "native-proof",
  version: "0.1.0",
  register() {},
});