import { ProgramMetadata } from "https://gear-js.deno.dev/api/index.ts";
import { parse } from "https://deno.land/std/toml/mod.ts";
import {
  hexToU8a,
  u8aToHex,
} from "https://deno.land/x/polkadot@0.2.45/util/index.ts";
import {
  blake2AsHex,
  blake2AsU8a,
} from "https://deno.land/x/polkadot@0.2.45/util-crypto/index.ts";

function packageName(): string {
  let cargoToml = Deno.readTextFileSync("Cargo.toml");
  const parsedToml = parse(cargoToml) as { [key: string]: any };
  const packageName = parsedToml["package"]["name"];
  return packageName;
}

export function metaTxtU8a(): Uint8Array {
  let pkgName = packageName().replaceAll("-", "_");
  return hexToU8a(Deno.readTextFileSync(`./target/wasm32-unknown-unknown/debug/${pkgName}.meta.txt`));
}

export function metaHex() {
  return u8aToHex(metaTxtU8a());
}

export function meta() {
  return ProgramMetadata.from(metaHex());
}