pipeline {
  agent any

  options {
    timestamps()
    disableConcurrentBuilds()
  }

  environment {
    // ===== Registry =====
    REGISTRY_HOST     = "registry.pjt.kr"
    IMAGE_REPO        = "alist/api"
    DOCKER_CRED       = "registry-pjt"

    // ===== api ssh =====
    SSH_HOST          = "121.160.234.222"
    SSH_PORT          = "2001"
    SSH_USER          = "bigfuntnp"
    SSH_COMPOSE_DIR   = "/srv/project/alist/compose"
    SSH_COMPOSE_FILE  = "api-compose.pjt.yml"

    // ===== jenkins workspace path =====
    WORK_COMPOSE_DIR  = "deploy/pjt/compose"
    WORK_COMPOSE_FILE = "api-compose.pjt.yml"
  }

  stages {
    stage('1) Git check out') {
      steps {
        echo "[1/1] Git check out"

        checkout scm
      }
    }

    stage('2) Build (Gradle)') {
      steps {
        sh '''
          set -e

          echo "[1/1] Gradle build"

          chmod +x ./gradlew
          ./gradlew clean build -x test
        '''
      }
    }

    stage('3) ImageTag create') {
      steps {
        script {

          echo "[1/1] ImageTag create"

          env.SHORT_SHA = sh(script: "git rev-parse --short HEAD", returnStdout: true).trim()
          echo "SHORT_SHA = ${env.SHORT_SHA}"
          env.IMAGE_TAG = "${env.BUILD_NUMBER}-${env.SHORT_SHA}"
          echo "IMAGE_TAG = ${env.IMAGE_TAG}"
        }
      }
    }

    stage('4) Docker Build') {
      steps {
        sh '''
          set -e

          echo "[1/1] docker build"

          docker build -t ${REGISTRY_HOST}/${IMAGE_REPO}:${IMAGE_TAG} .
         '''
      }
    }

    stage('5) Docker registry Login & Push') {
      steps {
        withCredentials([usernamePassword(
          credentialsId: DOCKER_CRED,
          usernameVariable: 'DOCKER_USER',
          passwordVariable: 'DOCKER_PASS'
        )]) {
          sh '''
            set -e

            echo "[1/2] docker registry login"
            echo "$DOCKER_PASS" | docker login ${REGISTRY_HOST} \
              -u "$DOCKER_USER" --password-stdin

            echo "[2/2] docker image push"
            docker push ${REGISTRY_HOST}/${IMAGE_REPO}:${IMAGE_TAG}

            docker logout ${REGISTRY_HOST}
          '''
        }
      }
    }

    stage('6) Jenkins cleanup') {
      steps {
        sh '''
          set -e

          echo "[1/3] Remove pushed image from Jenkins"
          docker rmi ${REGISTRY_HOST}/${IMAGE_REPO}:${IMAGE_TAG} 2>/dev/null || true

          echo "[2/3] Remove dangling images"
          docker image prune -f

          echo "[3/3] Remove old build cache (safe-ish)"
          docker builder prune -f || true
        '''
      }
    }

    stage('7) Copy compose') {
      steps {
        sshagent(['ssh-pjt']) {
          sh '''
            set -e

            echo "[1/2] ssh login"

            SRC="${WORK_COMPOSE_DIR}/${WORK_COMPOSE_FILE}"
            DST="${SSH_USER}@${SSH_HOST}:${SSH_COMPOSE_DIR}/${SSH_COMPOSE_FILE}"

            echo "[2/2] Copy compose $SRC -> $DST"
            scp -P ${SSH_PORT} -o StrictHostKeyChecking=no "$SRC" "$DST"
          '''
        }
      }
    }

    stage('8) Remote docker registry login') {
      steps {
        sshagent(['ssh-pjt']) {
          withCredentials([usernamePassword(
            credentialsId: DOCKER_CRED,
            usernameVariable: 'DOCKER_USER',
            passwordVariable: 'DOCKER_PASS'
          )]) {
            sh '''
              set -e

              echo "[1/1] docker registry login"

              ssh -p ${SSH_PORT} \
                -o StrictHostKeyChecking=no \
                -o UserKnownHostsFile=/dev/null \
                ${SSH_USER}@${SSH_HOST} \
                'set -e
                 REGISTRY_HOST='"${REGISTRY_HOST}"'
                 DOCKER_USER='"${DOCKER_USER}"'
                 DOCKER_PASS='"${DOCKER_PASS}"'

                 echo "$DOCKER_PASS" | docker login "$REGISTRY_HOST" -u "$DOCKER_USER" --password-stdin
                '
            '''
          }
        }
      }
    }

    stage('9) Remote docker pull') {
      steps {
        sshagent(['ssh-pjt']) {
          sh '''
            set -e
            ssh -p ${SSH_PORT} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
              ${SSH_USER}@${SSH_HOST} \
              'set -e
               cd '"${SSH_COMPOSE_DIR}"'
               export IMAGE_TAG='"${IMAGE_TAG}"'

               echo "[1/1] docker pull"
               docker compose -p alist-api --env-file /srv/project/alist/env/api/.env -f '"${SSH_COMPOSE_FILE}"' pull
              '
          '''
        }
      }
    }

    stage('10) Remote docker down & up') {
      steps {
        sshagent(['ssh-pjt']) {
          sh '''
            set -e
            ssh -p ${SSH_PORT} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null \
              ${SSH_USER}@${SSH_HOST} \
              'set -e
               cd '"${SSH_COMPOSE_DIR}"'
               export IMAGE_TAG='"${IMAGE_TAG}"'

               echo "[1/3] docker down (remove orphans)"
               docker compose -p alist-api --env-file /srv/project/alist/env/api/.env -f "'"${SSH_COMPOSE_FILE}"'" down --remove-orphans

               echo "[2/3] docker up"
               docker compose -p alist-api --env-file /srv/project/alist/env/api/.env -f '"${SSH_COMPOSE_FILE}"' up -d

               echo "[3/3] docker ps"
               docker compose -p alist-api --env-file /srv/project/alist/env/api/.env -f '"${SSH_COMPOSE_FILE}"' ps
              '
          '''
        }
      }
    }

    stage('11) Remote cleanup') {
      steps {
        sshagent(['ssh-pjt']) {
          sh '''
            set -e
            ssh -p ${SSH_PORT} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${SSH_USER}@${SSH_HOST} '
              set -e

              Repo='"${REGISTRY_HOST}/${IMAGE_REPO}"'

              docker images "${Repo}" --format '{{.Repository}}:{{.Tag}}' | grep -v -F -f <(docker ps --format '{{.Image}}') | xargs -r docker rmi
            '
          '''
        }
      }
    }

  }
}