require('regenerator-runtime/runtime')

const core = require('@actions/core')
const axios = require('axios')

// All variables we need from the runtime are loaded here
const getContext = require('./context')

const errorStatus = {
  'unknown_status' : 'Unable to get deployment status.',
  'not_found' :  'Deployment not found.',
  'deployment_attempt_error' : 'Deployment temporarily failed, a retry will be automatically scheduled...'
}

class Deployment {
    constructor() {
      const context = getContext()
      this.runTimeUrl = context.runTimeUrl
      this.repositoryNwo = context.repositoryNwo
      this.runTimeToken = context.runTimeToken
      this.buildVersion = context.buildVersion
      this.buildActor = context.buildActor
      this.actionsId = context.workflowRun
      this.githubToken = context.githubToken
      this.workflowRun = context.workflowRun
      this.requestedDeployment = false
      this.deploymentInfo = null
      this.githubApiUrl = context.githubApiUrl
      this.artifactName = context.artifactName
    }

    // Ask the runtime for the unsigned artifact URL and deploy to GitHub Pages
    // by creating a deployment with that artifact
    async create(idToken) {
      try {
        core.info(`Actor: ${this.buildActor}`)
        core.info(`Action ID: ${this.actionsId}`)
        const pagesDeployEndpoint = `${this.githubApiUrl}/repos/${this.repositoryNwo}/pages/deployment`
        const artifactExgUrl = `${this.runTimeUrl}_apis/pipelines/workflows/${this.workflowRun}/artifacts?api-version=6.0-preview`
        core.info(`Artifact URL: ${artifactExgUrl}`)
        const {data} = await axios.get(artifactExgUrl, {
          headers: {
            Authorization: `Bearer ${this.runTimeToken}`,
            'Content-Type': 'application/json'
          }
        })
        core.info(JSON.stringify(data))
        const artifactRawUrl = data?.value?.find(artifact => artifact.name === this.artifactName)?.url
        if (!artifactRawUrl) {
            throw new Error('No uploaded artifact was found! Please check if there are any errors at build step, or uploaded artifact name is correct.')
        }

        const artifactUrl = `${artifactRawUrl}&%24expand=SignedContent`
        const payload = {
          artifact_url: artifactUrl,
          pages_build_version: this.buildVersion,
          oidc_token: idToken
        }
        core.info(`Creating deployment with payload:\n${JSON.stringify(payload, null, '\t')}`)
        const response = await axios.post(pagesDeployEndpoint, payload, {
          headers: {
            Accept: 'application/vnd.github.v3+json',
            Authorization: `Bearer ${this.githubToken}`,
            'Content-type': 'application/json'
          }
        })
        this.requestedDeployment = true
        core.info(`Created deployment for ${this.buildVersion}`)
        if (response && response.data) {
          core.info(JSON.stringify(response.data))
          this.deploymentInfo = response.data
        }
      } catch (error) {

        core.info(error.stack)

        // output raw error in debug mode.
        core.debug(JSON.stringify(error))

        // build customized error message based on server response
        if (error.response) {
          let errorMessage = `Failed to create deployment (status: ${error.response.status}) with build version ${this.buildVersion}. `
          if (error.response.status == 400) {
            let message = ""
            if (error.response.data && error.response.data.message) {
              message = error.response.data.message
            } else {
              message = error.response.data
            }
            errorMessage += `Responded with: ${message}`
          }
          else if (error.response.status == 403) {
            errorMessage += `Ensure GITHUB_TOKEN has permission "pages: write".`
          } else if (error.response.status == 404) {
            errorMessage += `Ensure GitHub Pages has been enabled.`
          }
          else if (error.response.status >= 500) {
            errorMessage += `Server error, is githubstatus.com reporting a Pages outage? Please re-run the deployment at a later time.`
          }
          throw errorMessage
        } else {
          throw error
        }
      }
    }

    // Poll the deployment endpoint for status
    async check() {
      try {
        const statusUrl = this.deploymentInfo != null ?
          this.deploymentInfo["status_url"] :
          `${this.githubApiUrl}/repos/${this.repositoryNwo}/pages/deployment/status/${process.env['GITHUB_SHA']}`
        core.setOutput('page_url', this.deploymentInfo != null ? this.deploymentInfo["page_url"] : "")
        const timeout = Number(core.getInput('timeout'))
        const reportingInterval = Number(core.getInput('reporting_interval'))
        const maxErrorCount = Number(core.getInput('error_count'))
        var startTime = Date.now()
        var errorCount = 0

        // Time in milliseconds between two deployment status report when status errored, default 0.
        var errorReportingInterval = 0

        /*eslint no-constant-condition: ["error", { "checkLoops": false }]*/
        while (true) {
          // Handle reporting interval
          await new Promise(r => setTimeout(r, reportingInterval + errorReportingInterval))

          // Check status
          var res = await axios.get(statusUrl, {
            headers: {
              Authorization: `token ${this.githubToken}`
            }
          })

          if (res.data.status == 'succeed') {
            core.info('Reported success!')
            core.setOutput('status', 'succeed')
            break
          } else if (res.data.status == 'deployment_failed') {
            // Fall into permanent error, it may be caused by ongoing incident or malicious deployment content or exhausted automatic retry times.
            core.setFailed('Deployment failed, try again later.')
            break
          } else if(res.data.status == 'deployment_content_failed') {
            // The uploaded artifact is invalid.
            core.setFailed('Artifact could not be deployed. Please ensure the content does not contain any hard links, symlinks and total size is less than 10GB.')
            break
          } else if (errorStatus[res.data.status]) {
            // A temporary error happened, will query the status again
            core.info(errorStatus[res.data.status])
          } else {
            core.info('Current status: ' + res.data.status)
          }

          if (res.status != 200 || !!errorStatus[res.data.status]) {
            errorCount++

            // set the Maximum error reporting interval greater than 15 sec but below 30 sec.
            if (errorReportingInterval < 1000 * 15) {
              errorReportingInterval = errorReportingInterval << 1 | 1
            }
          } else {
            // reset the error reporting interval once get the proper status back.
            errorReportingInterval = 0
          }

          if (errorCount >= maxErrorCount) {
            core.info('Too many errors, aborting!')
            core.setFailed('Failed with status code: ' + res.status)
            break
          }

          // Handle timeout
          if (Date.now() - startTime >= timeout) {
            core.info('Timeout reached, aborting!')
            core.setFailed('Timeout reached, aborting!')
            return
          }
        }
      } catch (error) {
        core.setFailed(error)
        if (error.response && error.response.data) {
          core.info(JSON.stringify(error.response.data))
        }
      }
    }
  }
  module.exports = {Deployment}