name: Build Zero OS Initramfs

on:
  push:
    branches: [ main, master, development ]
  pull_request:
    branches: [ main, master ]
  workflow_dispatch:

env:
  ALPINE_VERSION: "3.22"
  KERNEL_VERSION: "6.12.44"
  RUST_TARGET: "x86_64-unknown-linux-musl"
  OPTIMIZATION_LEVEL: "max"

jobs:
  build:
    runs-on: ubuntu-latest
    timeout-minutes: 120
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
    
    - name: Setup rootless containers
      run: |
        # Configure subuid/subgid for runner user
        echo "runner:100000:65536" | sudo tee -a /etc/subuid
        echo "runner:100000:65536" | sudo tee -a /etc/subgid
        
        # Install container runtime
        sudo apt-get update
        sudo apt-get install -y podman
        
        # Verify rootless setup
        podman system info
    
    - name: Install build dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y \
          build-essential \
          rustc \
          cargo \
          upx-ucl \
          binutils \
          git \
          wget \
          qemu-system-x86 \
          musl-tools \
          bc \
          flex \
          bison \
          libelf-dev \
          libssl-dev
    
    - name: Setup Rust environment
      run: |
        rustup target add x86_64-unknown-linux-musl
        rustup component add clippy rustfmt
    
    - name: Cache Rust dependencies
      uses: actions/cache@v4
      with:
        path: |
          ~/.cargo/registry
          ~/.cargo/git
          components/*/target
        key: ${{ runner.os }}-rust-${{ hashFiles('config/sources.conf') }}
        restore-keys: |
          ${{ runner.os }}-rust-
    
    - name: Cache Alpine downloads
      uses: actions/cache@v4
      with:
        path: |
          /tmp/alpine-miniroot*.tar.gz
          /tmp/linux-*.tar.xz
        key: ${{ runner.os }}-downloads-${{ env.ALPINE_VERSION }}-${{ env.KERNEL_VERSION }}
        restore-keys: |
          ${{ runner.os }}-downloads-
    
    - name: Build initramfs
      run: |
        echo "Starting Zero OS build..."
        ./scripts/build.sh --no-container
    
    - name: Test with QEMU
      run: |
        echo "Testing with QEMU..."
        timeout 120 ./scripts/test.sh --qemu --timeout 60 || echo "Test completed (timeout expected)"
    
    - name: Analyze build artifacts
      run: |
        echo "Build artifacts:"
        ls -la dist/ || echo "No dist directory"
        
        if [ -f dist/vmlinuz.efi ]; then
          echo "Kernel size: $(du -h dist/vmlinuz.efi | cut -f1)"
        fi
        
        if [ -f dist/initramfs.cpio.xz ]; then
          echo "Initramfs size: $(du -h dist/initramfs.cpio.xz | cut -f1)"
        fi
        
        # Test archive integrity
        if [ -f dist/initramfs.cpio.xz ]; then
          echo "Testing initramfs archive integrity..."
          xz -t dist/initramfs.cpio.xz && echo "Archive integrity: OK"
        fi
    
    - name: Upload build artifacts
      uses: actions/upload-artifact@v4
      with:
        name: zero-os-initramfs-${{ github.sha }}
        path: |
          dist/vmlinuz.efi
          dist/initramfs.cpio.xz
        retention-days: 30
        if-no-files-found: warn
    
    - name: Upload build logs
      uses: actions/upload-artifact@v4
      if: always()
      with:
        name: build-logs-${{ github.sha }}
        path: |
          /tmp/qemu-*.log
          /tmp/cloud-hypervisor-*.log
        retention-days: 7
        if-no-files-found: ignore
    
    - name: Create release
      if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master'
      uses: softprops/action-gh-release@v1
      with:
        tag_name: v${{ github.run_number }}
        name: Zero OS Alpine Initramfs v${{ github.run_number }}
        body: |
          Zero OS Alpine Initramfs build ${{ github.run_number }}
          
          Built from commit: ${{ github.sha }}
          Alpine version: ${{ env.ALPINE_VERSION }}
          Kernel version: ${{ env.KERNEL_VERSION }}
          
          ## Files
          - `vmlinuz.efi`: Kernel with embedded initramfs
          - `initramfs.cpio.xz`: Standalone initramfs archive
        files: |
          dist/vmlinuz.efi
          dist/initramfs.cpio.xz
        draft: false
        prerelease: false
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  test-matrix:
    runs-on: ubuntu-latest
    needs: build
    if: success()
    strategy:
      matrix:
        test_type: [basic, serial]
        runner: [qemu]
      fail-fast: false
    
    steps:
    - name: Checkout code
      uses: actions/checkout@v4
    
    - name: Download build artifacts
      uses: actions/download-artifact@v4
      with:
        name: zero-os-initramfs-${{ github.sha }}
        path: dist/
    
    - name: Install test dependencies
      run: |
        sudo apt-get update
        sudo apt-get install -y qemu-system-x86
    
    - name: Test boot - ${{ matrix.runner }} ${{ matrix.test_type }}
      run: |
        chmod +x scripts/test.sh
        timeout 90 ./scripts/test.sh --${{ matrix.runner }} --${{ matrix.test_type }} --timeout 60 || echo "Test completed"