import fs from "fs";
import path from "path";

export enum AppType {
  UNKNOWN,
  NATIVE,
  GATSBY,
}

export function probeAppType(pwd: string): [AppType, boolean] {
  try {
    console.log('path', path.join(pwd, "gatsby-config.js"));
    fs.statSync(path.join(pwd, "gatsby-config.js"));
    try {
      if (
        fs
          .readdirSync(path.join(pwd, "src"))
          .find((dir) => dir === "components")
      ) {
        return [AppType.GATSBY, false];
      }
    } catch (ex) {
      // bypass
    }
    return [AppType.GATSBY, true];
  } catch (ex) {
    // bypass
  }

  for (const idxFile of ["index.js", "index.ts"]) {
    try {
      const rnExp = /import.*AppRegistry.*react-native/g;
      const idxContent = fs.readFileSync(path.join(pwd, idxFile)).toString();
      if (idxContent.match(rnExp)) {
        try {
          if (
            fs
              .readdirSync(path.join(pwd, "src"))
              .find((dir) => dir === "components")
          ) {
            return [AppType.GATSBY, false];
          }
        } catch (ex) {
          // bypass
        }
      }
      return [AppType.NATIVE, true];
    } catch (ex) {
      // bypass
    }
  }

  return [AppType.UNKNOWN, false];
}