'use strict'

let exec = require('child_process').execFile
let fs = require('fs')

module.exports = function (context) {
  let sshGitUrl = (app) => `git@${context.gitHost}:${app}.git`
  let gitUrl = (app) => `https://${context.httpGitHost}/${app}.git`

  function git (args) {
    return new Promise(function (resolve, reject) {
      exec('git', args, function (error, stdout, stderr) {
        process.stderr.write(stderr)
        if (error) return reject(error)
        resolve(stdout)
      })
    })
  }

  function hasGitRemote (remote) {
    return git(['remote'])
      .then((remotes) => remotes.split('\n'))
      .then((remotes) => remotes.find((r) => r === remote))
  }

  function createRemote (remote, url) {
    return hasGitRemote(remote)
      .then((exists) => !exists ? git(['remote', 'add', remote, url]) : null)
  }

  function listRemotes () {
    return git(['remote', '-v'])
      .then((remotes) => remotes.trim().split('\n').map((r) => r.split(/\s/)))
  }

  function inGitRepo () {
    try {
      fs.lstatSync('.git')
      return true
    } catch (err) {
      if (err.code !== 'ENOENT') throw err
    }
  }

  function rmRemote (remote) {
    return git(['remote', 'rm', remote])
  }

  return {
    sshGitUrl,
    gitUrl,
    createRemote,
    listRemotes,
    rmRemote,
    inGitRepo
  }
}