import mergeJsonStr from "merge-packages";
import fs from "fs";

export function mergePackageJson(targetPackageJsonPath: string, secondPackageJsonPath: string, isDev: boolean) {
  const existsTarget = fs.existsSync(targetPackageJsonPath);
  const existsSecond = fs.existsSync(secondPackageJsonPath);
  if (!existsTarget && !existsSecond) {
    return;
  }

  const targetPackageJson = existsTarget ? fs.readFileSync(targetPackageJsonPath, "utf8") : "{}";

  const secondPackageJson = existsSecond ? fs.readFileSync(secondPackageJsonPath, "utf8") : "{}";

  const mergedPkgStr = mergeJsonStr.default(targetPackageJson, secondPackageJson);

  const formattedPkgStr = JSON.stringify(JSON.parse(mergedPkgStr), null, 2);

  fs.writeFileSync(targetPackageJsonPath, formattedPkgStr, "utf8");
  if (isDev) {
    const devStr = `TODO: write relevant information for the contributor`;
    fs.writeFileSync(`${targetPackageJsonPath}.dev`, devStr, "utf8");
  }
}