// Loading code requires a NODE context
// But we want the code accessible outside the node Context
// So declare common (object created by the LOAD operation) outside the Node block.
def common

// declarative pipeline
pipeline {
  agent any

  parameters {
    string(name: 'BUILD_BRANCH', defaultValue: 'main', description: 'Enter the branch of the NWL to build (default = main), will skip deployment if not main')
    booleanParam(name: 'CLEAN_BUILD', defaultValue: true, description: 'do a clean build, i.e. remove the yocto directory and start from scratch')
    booleanParam(name: 'DRY_RUN', defaultValue: true, description: 'do a dry run, i.e. without committing and pushing')
  }

  options {
    timeout(time: 1, unit: 'HOURS')
    buildDiscarder(
      logRotator(numToKeepStr: '10')
    )
  }

  stages {

    stage('Prepare') {
      steps {
        script {
          printJobParameters()
          setDisplayName()

          // load common file
          common = load "./jobs/Jenkinsfile_Common"

          handleCleanBuild(common)
          common.gitCheckout("${env.YOCTO_REPO_URL}", "${params.BUILD_BRANCH}", "${env.YOCTO_REPO_DIR}", true, false)
        }
      }
    }

    stage('Update') {
      steps {
        script {
          updateTheSourceRevisions(common, "${env.YOCTO_REPO_DIR}", "${params.BUILD_BRANCH}")
          commitAndPushTheChanges(common, "${env.YOCTO_REPO_DIR}", "${params.BUILD_BRANCH}")
        }
      }
      post {
        always {
          script {
            common.cleanupRepository("${env.YOCTO_REPO_DIR}")
          }
        }
      }

    }

  } // stages
}

//-----------------------------------------------------------------------------
def printJobParameters() {
  println "----------------------------------\n\
  Job Parameters:\n\
----------------------------------\n\
    BUILD_BRANCH       = ${params.BUILD_BRANCH}\n\
    CLEAN_BUILD        = ${params.CLEAN_BUILD}\n\
    DRY_RUN            = ${params.DRY_RUN}\n\
----------------------------------\n"
}
//---------------------------------------------------------------------------------------------------------------------
def setDisplayName() {
  def buildName = "#${env.BUILD_NUMBER}"
  def theBranch = "${params.BUILD_BRANCH}"
  def cleaning = ("${params.CLEAN_BUILD}" == true) ? "-clean" : ""
  currentBuild.displayName = "${buildName}-${theBranch}${cleaning}"
}
//---------------------------------------------------------------------------------------------------------------------
def handleCleanBuild(commonHelpers) {
  if(params.CLEAN_BUILD) {
    println "CLEAN BUILD REQUESTED, cleaning..."
    commonHelpers.cleaningClonedRepoDir()
  }
}


//---------------------------------------------------------------------------------------------------------------------
def updateTheSourceRevisions(commonHelpers, repoDir, theBranch) {
  dir(repoDir) {
    commonHelpers.gitUpdateSubmodulesCheckoutBranch(theBranch, true, true)
    commonHelpers.printSubmoduleStatus(true)
  }
}
//---------------------------------------------------------------------------------------------------------------------
def createPR(theBranch) {
  def prReviewer = "bard"
  def prProject = "NM-NSP"
  def prRepo = "netmodule-wireless-linux"

  def bitbucketRestApiUrl = "https://bitbucket.gad.local/rest/api/1.0"
  def prTitle = "Nightly: Src Rev Update"
  def prDescription = "CI is updating the source revisions to HEAD"
  def prRepository = "\"repository\": {\"slug\": \"${prRepo}\", \"name\": null, \"project\": {\"key\": \"${prProject}\"}}"
  def prDataJson = "{\"title\": \"${prTitle}\", \"description\": \"${prDescription}\",\
                     \"state\": \"OPEN\", \"open\": true, \"closed\": false,\
                     \"fromRef\": {\"id\": \"refs/heads/${theBranch}\", ${prRepository}},\
                     \"toRef\": {\"id\": \"refs/heads/main\", ${prRepository}},\
                     \"locked\": false,\
                     \"reviewers\": [{\"user\": {\"name\": \"${prReviewer}\"}}], \"links\": {\"self\": [null]}}"
  def prUrl = "${bitbucketRestApiUrl}/projects/${prProject}/repos/${prRepo}/pull-requests"
  def authHeader = "Authorization: Bearer MDI1NjczNzAyMTI3OrbDBQestfmsi/Iys5qvKP4Tgulp"
  def acceptHeader = "Accept: application/json"
  def contentHeader = "Content-Type: application/json"

  def prResponse = sh(returnStdout: true,
                      script: "curl --request POST --url '${prUrl}' \
                               --header '${authHeader}' \
                               --header '${acceptHeader}' \
                               --header '${contentHeader}' \
                               --data '${prDataJson}'").toString()
  if(prResponse.contains("error")) {
    error("Failed creating PR/MR:\n${prResponse}")
  }
}
//---------------------------------------------------------------------------------------------------------------------
def commitAndPushTheChanges(commonHelpers, repoDir, origBranch) {
  def commitMsg = "srcrev: updated source revisions by Jenkins Job"
  def nightlyBranch = "nightly"
  def usedBranch = "${origBranch}"
  def branchFile = "${env.NIGHTLY_BRANCH_FILE}"

  dir(repoDir) {
    if(sh(returnStdout: true, script: "git status | grep \"modified:\" | wc -l").toInteger() != 0) {
      def changedItems = sh(returnStdout: true, script: "git status")
      sh(label: "Stage tracked and changed git files", returnStdout: true, script: "git add \\*")

      if(params.DRY_RUN) {
        println "DRY RUN: commit message = '${commitMsg}'\n         changes = ${changedItems}"
        sh(script: "git reset HEAD > /dev/null")
      }
      else {
        def theCredentials = commonHelpers.getGitCredentialID()
        println "Commit and Push changes; message = '${commitMsg}'\nchanges = ${changedItems}"
        sshagent (credentials: [theCredentials]) {
          // ToDo: replace the user.email and user.name once a CI user is setup in the
          //       active directory.
          sh(label: "Commit and push changes", returnStdout: true, script: """
            git config --global user.email "marc.mattmueller@netmodule.com"
            git config --global user.name "Marc Mattm\u00fcller"
            git checkout -B ${nightlyBranch}
            git commit -m "${commitMsg}"
            git push --force --set-upstream origin ${nightlyBranch}
            """)
        }
        usedBranch = "${nightlyBranch}"
        createPR("${nightlyBranch}")
      }
    } // if changes available
  }
  writeFile(file: branchFile, text: "${usedBranch}")
  archiveArtifacts(artifacts: branchFile, onlyIfSuccessful: true)
}