on:
  workflow_dispatch:
    inputs:
      buildThreads:
        description: 'Build threads for libnd4j. Used to control memory usage of builds.'
        required: true
        default: 2

      deployToReleaseStaging:
        description: 'Whether to deploy to release staging or not.'
        required: false
        default: 0

      releaseVersion:
        description: 'Release version target'
        required: false
        default: 1.0.0-M3

      snapshotVersion:
        description: 'Snapshot version target'
        required: false
        default: 1.0.0-SNAPSHOT

      serverId:
        description: 'Server id to publish to'
        required: false
        default: central

      releaseRepoId:
        description: 'Release repository id'
        required: false
        default: ''

      mvnFlags:
        description: "Extra maven flags (must escape input yourself if used)"
        required: false
        default: ""

      libnd4jUrl:
        description: 'Sets a libnd4j download url for this build. LIBND4J_HOME will automatically be set. Should be used when only needing to build other modules.'
        required: false
        default: ""

      runsOn:
        description: 'System to run on'
        required: false
        default: ubuntu-22.04

      debug_enabled:
        description: 'Run the build with tmate debugging enabled (https://github.com/marketplace/actions/debugging-with-tmate)'
        required: false
        default: false

      swapSize:
        description: 'Swap file size in GB (e.g., 4 for 4GB)'
        required: false
        default: 12

jobs:
  #Note: no -pl here because we publish everything from this branch and use this as the basis for all uploads.
  linux-x86_64:
    strategy:
      fail-fast: false
      matrix:
        helper: [onednn,""]
        extension: [avx2,avx512,""]
        include:
          - mvn_ext: ${{ github.event.inputs.mvnFlags }}
            experimental: true
            name: Extra maven flags
          - debug_enabled: ${{ github.event.inputs.debug_enabled }}
            experimental: true
            name: Debug enabled

          - runs_on: ${{ github.event.inputs.runsOn }}
            experimental: true
            name: OS to run on

          - libnd4j_file_download: ${{ github.event.inputs.libnd4jUrl }}
            experimental: true
            name: libnd4j download URL

          - deploy_to_release_staging: ${{ github.event.inputs.deployToReleaseStaging }}
            experimental: true
            name: Whether to deploy to release staging or not

          - release_version: ${{ github.event.inputs.releaseVersion }}
            experimental: true
            name: Release version

          - snapshot_version: ${{ github.event.inputs.snapshotVersion }}
            experimental: true
            name: Snapshot version

          - server_id: ${{ github.event.inputs.serverId }}
            experimental: true
            name: Server id

          - release_repo_id: ${{ github.event.inputs.releaseRepoId }}
            experimental: true
            name: Release repository id

          - mvn_flags: ${{ github.event.inputs.mvnFlags }}
            experimental: true
            name: Extra maven flags to use as part of the build

          - build_threads: ${{ github.event.inputs.buildThreads }}
            experimental: true
            name: The number of threads to build libnd4j with

          - swap_size: ${{ github.event.inputs.swapSize }}
            experimental: true
            name: Swap file size in GB

    runs-on: ${{ matrix.runs_on }}
    steps:
      - uses: AutoModality/action-clean@v1

      - name: Cancel Previous Runs
        uses: styfle/cancel-workflow-action@0.8.0
        with:
          access_token: ${{ github.token }}

      - uses: actions/checkout@v4

      - name: Free Disk Space
        uses: jlumbroso/free-disk-space@main
        with:
          tool-cache: false
          android: true
          dotnet: true
          haskell: true
          large-packages: true
          docker-images: true
          swap-storage: true

      - name: Configure swap space
        shell: bash
        run: |
          echo "=== Initial system status ==="
          free -h
          df -h
          echo "Available disk space on root:"
          df -h /
          
          # Check if swap is already enabled
          if swapon --show | grep -q "/"; then
            echo "Swap already configured:"
            swapon --show
          else
            echo "Configuring swap space..."
          
            # Use input parameter for swap size, default to 12GB like Android workflow
            SWAP_SIZE="${{ matrix.swap_size }}G"
            echo "Creating ${SWAP_SIZE} swap file..."
          
            # Create swap file
            sudo fallocate -l ${SWAP_SIZE} /swapfile || {
              echo "fallocate failed, trying dd..."
              sudo dd if=/dev/zero of=/swapfile bs=1G count=${{ matrix.swap_size }} status=progress
            }
          
            # Set up swap
            sudo chmod 600 /swapfile
            sudo mkswap /swapfile
            sudo swapon /swapfile
          
            # Verify swap is active
            echo "=== Swap configuration completed ==="
            free -h
            swapon --show
          fi
          
          # Tune swappiness for build workloads - using Android workflow settings
          # Lower values (10-20) prefer RAM, higher values (60+) use swap more aggressively
          echo "Current swappiness: $(cat /proc/sys/vm/swappiness)"
          sudo sysctl vm.swappiness=80
          echo "Adjusted swappiness: $(cat /proc/sys/vm/swappiness)"
          sudo sysctl vm.overcommit_memory=2        # Allow overcommit
          sudo sysctl vm.overcommit_ratio=80
          
          # Show final memory status
          echo "=== Final memory status ==="
          free -h

      - uses: ./.github/actions/set-linux-distro-version

      - name: Set mvn build command based on matrix
        shell: bash
        run: |
          if  [  "${{ matrix.libnd4j_file_download }}" != '' ]; then
             modules=':nd4j-native,:nd4j-native-preset'
          else 
           echo "Building libnd4j from source"
           modules=':nd4j-native,:nd4j-native-preset,:libnd4j'
          fi
          command="mvn  ${{ matrix.mvn_ext }} -Dlibnd4j.generate.flatc=ON --no-transfer-progress -pl $modules -Pcpu -Dlibnd4j.buildthreads=${{ matrix.build_threads }} -Dhttp.keepAlive=false -Dmaven.wagon.http.pool=false -Dmaven.wagon.http.retryHandler.count=3   -Possrh  -DskipTestResourceEnforcement=true  -Dmaven.javadoc.failOnError=false -Djavacpp.platform=linux-x86_64  -Pcpu  --also-make  --batch-mode deploy -DskipTests"
          if [ "${{ matrix.helper }}" != '' ] && [ "${{ matrix.extension }}" != '' ]; then
                 mvn_ext=" -Dlibnd4j.helper=${{ matrix.helper }} -Dlibnd4j.extension=${{ matrix.extension }} -Djavacpp.platform.extension=-${{ matrix.helper }}-${{ matrix.extension }} -Dlibnd4j.classifier=linux-x86_64-${{ matrix.helper }}-${{matrix.extension}}"
          elif [ "${{ matrix.helper }}" != '' ]; then
                 mvn_ext=" -Dlibnd4j.helper=${{ matrix.helper }} -Dlibnd4j.extension=${{ matrix.helper }} -Djavacpp.platform.extension=-${{ matrix.helper }} -Dlibnd4j.classifier=linux-x86_64-${{ matrix.helper }}"
          elif [ "${{ matrix.extension }}" != '' ]; then
                 mvn_ext=" -Dlibnd4j.extension=${{ matrix.extension }} -Djavacpp.platform.extension=-${{ matrix.extension }} -Dlibnd4j.classifier=linux-x86_64-${{ matrix.extension }}"
           else
               mvn_ext=""
          fi
          if  [  "${{ matrix.libnd4j_file_download }}" != '' ]; then
             echo "Adding libnd4j download"
          fi
          command="${command} ${mvn_ext}"
          echo "Setting command for helper ${{ matrix.helper }} and extension ${{ matrix.extension }} to ${command}"
          echo "COMMAND=${command}" >> $GITHUB_ENV

      - uses: ./.github/actions/update-deps-linux

      - name: Cache cmake install
        uses: actions/cache@v4
        id: cache-cmake
        with:
          path: /opt/cmake
          key: ${{ runner.os }}-cmake-${{ github.run_id }}
          restore-keys: |
            ${{ runner.os }}-cmake-

      - name: Cache protobuf install
        uses: actions/cache@v4
        id: cache-protobuf
        with:
          path: /opt/protobuf
          key: ${{ runner.os }}-protobuf-${{ github.run_id }}
          restore-keys: |
            ${{ runner.os }}-protobuf-

      - uses: ./.github/actions/install-protobuf-linux
        if: steps.cache-protobuf.outputs.cache-hit != 'true'

      - uses: ./.github/actions/install-cmake-linux
        if: steps.cache-cmake.outputs.cache-hit != 'true'

      - name: Set up Java for publishing to GitHub Packages
        uses: actions/setup-java@v4
        with:
          java-version: 11
          distribution: 'temurin'
          server-id:  ${{ github.event.inputs.serverId }}
          server-username: MAVEN_USERNAME
          server-password: MAVEN_PASSWORD
          gpg-private-key: ${{ secrets.SONATYPE_GPG_KEY }}
          gpg-passphrase: MAVEN_GPG_PASSPHRASE
          cache: 'maven'

      - name: Setup libnd4j home if a download url is specified
        shell: bash
        run: |
          mkdir "${GITHUB_WORKSPACE}/openblas_home"
          cd "${GITHUB_WORKSPACE}/openblas_home"
          wget https://repo1.maven.org/maven2/org/bytedeco/openblas/0.3.28-1.5.11/openblas-0.3.28-1.5.11-linux-x86_64.jar
          unzip openblas-0.3.28-1.5.11-linux-x86_64.jar
          cd ..
          echo "OPENBLAS_PATH=${GITHUB_WORKSPACE}/openblas_home/org/bytedeco/openblas/linux-x86_64" >> "$GITHUB_ENV"
          cp ${GITHUB_WORKSPACE}/openblas_home/org/bytedeco/openblas/linux-x86_64/libopenblas.so.0  ${GITHUB_WORKSPACE}/openblas_home/org/bytedeco/openblas/linux-x86_64/libopenblas.so
        if: ${{ github.event.inputs.libnd4jUrl != '' }}

      - name: Monitor memory during build
        shell: bash
        run: |
          # Start background memory monitoring
          (while true; do 
            echo "$(date '+%H:%M:%S'): $(free -h | head -n 2 | tail -n 1)"
            if swapon --show | grep -q "/"; then
              echo "$(date '+%H:%M:%S'): Swap: $(swapon --show --noheadings)"
            fi
            sleep 120  # Check every 2 minutes
          done) > memory_monitor.log 2>&1 &
          MONITOR_PID=$!
          echo "MONITOR_PID=${MONITOR_PID}" >> $GITHUB_ENV
          echo "Started memory monitoring (PID: ${MONITOR_PID})"

      - name: Build on linux-x86_64
        shell: bash
        env:
          MAVEN_GPG_KEY: ${{ secrets.SONATYPE_GPG_KEY }}
          DEBIAN_FRONTEND: noninteractive
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          PUBLISH_TO: central
          MAVEN_USERNAME: ${{ secrets.CENTRAL_SONATYPE_TOKEN_USERNAME }}
          MAVEN_PASSWORD: ${{ secrets.CENTRAL_SONATYPE_TOKEN_PASSWORD }}
          MAVEN_GPG_PASSPHRASE: ${{ secrets.PACKAGES_GPG_PASS }}
          PERFORM_RELEASE: ${{ matrix.deploy_to_release_staging }}
          RELEASE_VERSION: ${{ matrix.release_version }}
          SNAPSHOT_VERSION: ${{ matrix.snapshot_version }}
          RELEASE_REPO_ID: ${{ matrix.release_repo_id }}
          MODULES: ${{ matrix.mvn_flags }}
          HELPER: ${{ matrix.helper }}
          EXTENSION: ${{ matrix.extension }}
          MAVEN_OPTS: -Xmx2g
          LIBND4J_FILE_NAME: ${{ matrix.libnd4j_file_download }}
          RLIMIT_AS: 6442450944  # 6GB virtual memory limit
          RLIMIT_DATA: 4294967296  # 4GB data segment limit
        run: |
          echo "libnd4j build threads ${{ matrix.build_threads }}"
          echo "deploy to release staging repo or not ${{ matrix.deploy_to_release_staging }}"
          echo "release version ${{ matrix.release_version }}"
          echo "snapshot version ${{ matrix.snapshot_version }}"
          echo "debug enabled ${{ matrix.debug_enabled }}"
          echo "libnd4j url ${{ matrix.libnd4j_file_download }}"
          echo "maven flags ${{ matrix.mvn_flags }}"
          echo "snapshot version ${{ matrix.snapshot_version }}"
          echo "server id ${{ matrix.server_id }}"
          echo "release repo id ${{ matrix.release_repo_id }}"
          echo "swap size ${{ matrix.swap_size }}GB"
          
          # Show memory status before build
          echo "=== Memory status before build ==="
          free -h
          
          export PATH=/opt/protobuf/bin:/opt/cmake/bin:$PATH
          mvn --version
          cmake --version
          protoc --version
          export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$OPENBLAS_PATH"
          
          if [ "$PERFORM_RELEASE" == 1 ]; then
                    bash ${GITHUB_WORKSPACE}/release-specified-component.sh "${RELEASE_VERSION}" "${SNAPSHOT_VERSION}" "${RELEASE_REPO_ID}" "${COMMAND}"
                   else
                       echo "Running build and deploying to snapshots"
                       eval "${COMMAND}"
          fi

      - name: Show memory usage summary
        if: always()
        shell: bash
        run: |
          # Stop memory monitoring
          if [ -n "$MONITOR_PID" ]; then
            kill $MONITOR_PID 2>/dev/null || true
          fi
          
          echo "=== Final memory status ==="
          free -h
          if swapon --show | grep -q "/"; then
            echo "=== Swap usage ==="
            swapon --show
          fi
          
          echo "=== Memory usage during build ==="
          if [ -f memory_monitor.log ]; then
            cat memory_monitor.log
          else
            echo "No memory monitoring log found"
          fi

      - name: Cleanup swap
        if: always()
        shell: bash
        run: |
          echo "Cleaning up swap configuration..."
          sudo swapoff /swapfile 2>/dev/null || true
          sudo rm -f /swapfile 2>/dev/null || true
          echo "Swap cleanup completed"