'use strict'

const Joi = require('joi')
const { errorMessagesFor } = require('./github-helpers')

const issueSchema = Joi.object({
  head: Joi.object({
    sha: Joi.string().required(),
  }).required(),
}).required()

async function fetchIssue(serviceInstance, { user, repo, number }) {
  return serviceInstance._requestJson({
    schema: issueSchema,
    url: `/repos/${user}/${repo}/pulls/${number}`,
    errorMessages: errorMessagesFor('pull request or repo not found'),
  })
}

module.exports = {
  fetchIssue,
}