version: 2
jobs:
  build:

    # Set working diretory
    working_directory: ~/kikaha-api

    # Import docker image for java
    docker:
      - image: circleci/openjdk:8-jdk-browsers

    # Declare steps needed
    steps:

      # Git checkout latest code.
      - checkout

      # Restores cache if any
      - restore_cache:
          key: kikaha-api-{{ checksum "pom.xml" }}

      # Run mvn go-offline for optimasation
      - run: mvn dependency:go-offline

      # Save cache for any mvn dependency download
      - save_cache:
          paths:
            - ~/.m2
          key: kikaha-api-{{ checksum "pom.xml" }}

      # Install rsync, we need it to copy files from dynamic boot environment to target server
      - run: sudo apt install rsync

      # Deploy info
      - deploy:
          # Git branch name to deploy
          name: deploy master
          command: |

            # Multiple profile to support multiple instances of kikaha on a single server.

            MVN_PROFILE="production_instance_1"

            TARGET_DIR=/tmp

            case $MVN_PROFILE in production_instance_1)
            	TARGET_DIR=/opt/dir/kikaha-api
            	break
            	;;
            production_instance_2)
            	TARGET_DIR=/opt/dir/kikaha-api2
            	break
            	;;
            production_instance_3)
            	TARGET_DIR=/opt/dir/kikaha-api3
            	;;
            esac

            rsync -avz -e 'ssh -p 222 -o StrictHostKeyChecking=no' --progress /home/circleci/kikaha-api/ <host-user>@<host-ip-address>:$TARGET_DIR
            STATUS=$?
            if [ $STATUS -eq 0 ]; then
              ssh -p 222 -o StrictHostKeyChecking=no <host-user>@<host-ip-address> MP=$MVN_PROFILE TD=$TARGET_DIR 'bash -s' <<'ENDSSH'

                # Change directory to target/working directory.
                cd $TD

                # Stop kikaha running instance, if any.
                if [[ -f output/kikaha-api-0.0.1/bin/kikaha.sh ]]; then
                    sh output/kikaha-api-0.0.1/bin/kikaha.sh stop
                else
                    echo "kikaha.sh stop failed. File does not exists"
                fi

                # Perform `mvn clean install -P <Maven Profile>`
                # Maven lets you specify either goals or lifecycle phases on the command line (or both). 
                # You can call more than one target goal with maven. mvn clean install calls clean first, then install . 
                # You have to clean manually, because clean is not a standard target goal 
                # and not executed automatically on every install.
                mvn clean install -P $MP
                STATUS=$?

                # Handle success.
                if [ $STATUS -eq 0 ]; then
                    echo "Maven build is successful."

                    # Output directory.
                    cd output/
                    pwd

                    # Extract .zip file created by the CircleCI.
                    unzip kikaha-api-0.0.1.zip
                    STATUS=$?
                    if [ $STATUS -eq 0 ]; then
                        echo "Unzip is successful."

                        sh kikaha-api-0.0.1/bin/kikaha.sh start
                        STATUS=$?
                        if [ $STATUS -eq 0 ]; then
                            echo "Service has started!"

                            if [[ -f kikaha-api-0.0.1/server.log ]]; then
                            tail -f kikaha-api-0.0.1/server.log
                            fi
                        else
                            echo "Failed to start service.."
                        fi
                    else
                        echo "Unzip has failed."
                    fi
                else
                    echo "Maven build has failed."
                fi
            ENDSSH
            else
              echo "Rsync has failed. Please check and try again."
            fi
workflows:
  version: 2
  build:
    jobs:
      - build