'use strict'

let validator = require('validator')
let inquirer = require('inquirer')
let api = require('./api')

function * disambiguate (heroku, pipelineIDOrName) {
  var pipeline
  if (validator.isUUID(pipelineIDOrName)) {
    pipeline = yield api.getPipeline(heroku, pipelineIDOrName)
  } else {
    let pipelines = yield api.findPipelineByName(heroku, pipelineIDOrName)
    if (pipelines.length === 0) {
      throw new Error('Pipeline not found')
    } else if (pipelines.length === 1) {
      pipeline = pipelines[0]
    } else {
      // Disambiguate
      let choices = pipelines.map(function (x) { return {name: new Date(x.created_at), value: x} })
      let questions = [{
        type: 'list',
        name: 'pipeline',
        message: `Which ${pipelineIDOrName} pipeline?`,
        choices: choices
      }]
      pipeline = yield new Promise(function (resolve, reject) {
        inquirer.prompt(questions, function (answers) {
          if (answers.pipeline) resolve(answers.pipeline)
          else reject('Must pick a pipeline')
        })
      })
    }
  }
  return pipeline
}

module.exports = disambiguate