import { execSync } from "node:child_process";
import fs from "node:fs";
import { pathToFileURL } from "node:url";

export const startMarker = "### START-OF-ICON-MAP";
export const endMarker = "### END-OF-ICON-MAP";

export function build() {
  execSync("./node_modules/.bin/svgtofont -s svgs/ -o dist/", {
    stdio: "inherit",
  });

  const iconMap = fs.readdirSync("./mappings").map((file) => {
    const iconName = file.replace(".svg", "");
    const appNames = fs.readFileSync(`./mappings/${file}`, "utf8").trim();
    return {
      iconName,
      appNames,
    };
  });

  const iconMapBashFn = `
${startMarker}
function __icon_map() {
    case "$1" in
${iconMap
  .map(
    ({ appNames, iconName }) =>
      `   ${appNames})
        icon_result="${iconName}"
        ;;`,
  )
  .join("\n")}
    *)
        icon_result=":default:"
        ;;
    esac
}
${endMarker}`;

  fs.writeFileSync(
    "./dist/icon_map.sh",
    `#!/usr/bin/env bash
${iconMapBashFn}
`,
    "utf8",
  );

  const iconMapLua = `return {
${iconMap
  .map(({ appNames, iconName }) =>
    appNames
      .split("|")
      // remove all * in mappings
      .map((app) => app.replace("*", ""))
      .map((app) => `\t[${app.trim()}] = "${iconName}",`)
      .join("\n"),
  )
  .join("\n")}
}`;

  fs.writeFileSync("./dist/icon_map.lua", iconMapLua, "utf8");

  // chmod +x ./dist/icon_map.sh
  fs.chmodSync("./dist/icon_map.sh", 0o755);

  return { iconMapBashFn };
}

// only execute if run directly (ESM)
// use url instead of __filename to support pnpm
if (import.meta.url === pathToFileURL(process.argv[1]).toString()) {
  build();
}