var Promise = require('promise')
var requestPromise = require('./helpers/requestPromise.js')
var BasePlugin = require('./base.js')
const logger = require('../logger')

class Kernel extends BasePlugin {
  constructor (config) {
    super(config)
    this.name = 'Kernel'
  }
  getKernelData (queryText) {
    var urlArgs = {}
    var url = 'https://www.kernel.org/releases.json'

    var promise = requestPromise(url, urlArgs)

    return promise
  }

  test (input) {
    // Kernel version
    if (input.match(/^\.kernel( (.+))?/i)) {
      return true
    }
    return false
  }

  result (input) {
    var that = this
    var resultPromise = new Promise(function (resolve, reject) {
      var res = input.match(/^\.kernel( (.+))?/i)
      if (res !== null) {
        var version = res[2]
        logger.info('Search kernel version ' + res[2])

        that.getKernelData().then(function (data) {
          var text = 'kernel: '

          // Store current versions!
          var releaseToVersion = {}
          data.releases.forEach(function (val) {
            var regex = /([0-9]+?)(\.([0-9]+))?(\.([0-9]+))?/
            var result = val.version.match(regex)

            var major = result[1]
            var minor = result[3]

            if (typeof major !== 'undefined' && typeof minor !== 'undefined') {
              var releaseWithVersion = val.moniker + '-' + major + '-' + minor
              var release = val.moniker + ''

              if (typeof releaseToVersion[releaseWithVersion] !== 'undefined') {
                if (releaseToVersion[releaseWithVersion] !== val.version) {
                  // new release
                }
              }
              if (typeof releaseToVersion[release] === 'undefined') {
                releaseToVersion[release] = val.version
              }

              releaseToVersion[releaseWithVersion] = val.version
            }
          }, function (error) {
            reject(error)
          })

          if (typeof releaseToVersion[version] !== 'undefined') {
            text += 'Viimeisin versio on ' + releaseToVersion[version] + ' (' + version + ')'
          } else {
            text += 'Viimeisin vakaa versio on ' + data.latest_stable.version
          }

          resolve(text)
        }, function (error) {
          reject(error)
        })
      }
    })

    return resultPromise
  }
}

module.exports = Kernel