const shell = require("shelljs"),
  fs = require("fs"),
  path = require("path"),
  ansi = require("ansi"),
  cursor = ansi(process.stdout),
  homedir = require("os").homedir(),
  rcPath = getRCFilePath(),
  exec = shell.exec,
  { COPYFILE_EXCL } = fs.constants;

function getRCFilePath() {
  try {
    fs.accessSync(path.join(homedir, ".zshrc"));
    return ".zshrc";
  } catch (err) {
    try {
      fs.accessSync(path.join(homedir, ".bashrc"));
      return ".bashrc";
    } catch (err) {
      console.error("No bash file found");
      throw err;
    }
  }
}

function cloneRepo(url, dest) {
  return exec(`git clone ${url} --depth=1 --single-branch ${dest}`);
}

function installFile(fileName) {
  const src = path.join(__dirname, fileName),
    dst = path.join(homedir, `.${fileName}`);

  fs.symlink(src, dst, (err) => {
    if (err) {
      if (err.code == "EEXIST") {
        console.log(`${fileName} already installed`);
      } else {
        throw err;
      }
    } else {
      console.log(`installing ${fileName}`);
    }
  });
}

function sourceOnSession(scriptName) {
  const scriptPath = path.join(__dirname, scriptName);
  let bashRC = fs.readFileSync(rcPath, "utf8");
  if (!bashRC.match(scriptName)) {
    console.log(`installing ${scriptName}`);
    bashRC += `\n. ${scriptPath}`;
    fs.writeFileSync(rcPath, bashRC);
  } else {
    console.log(`${scriptName} already installed`);
  }
}

module.exports = {
  sourceOnSession,
  installFile,
  cloneRepo,
  exec: shell.exec,
  tryAndRunScript: function (name) {
    try {
      fs.accessSync(`./${name}.js`);
      const result = shell.exec(`./${name}.js`);
      if (result.code) {
        return false;
      }
    } catch (err) {
      console.log(`Skippking ${name} step`);
    }
    return true;
  },
  print: function (message) {
    cursor.green().write(message).reset().write("\n");
  },
  stagedFiles: function () {
    return shell.exec(`git diff --staged --name-only`).stdout.split("\n");
  },
};