name: CI

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

env:
  CARGO_TERM_COLOR: always
  RUSTFLAGS: "--cfg ci"

jobs:
  test:
    name: Test
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
        rust: [stable, beta]
    steps:
    - uses: actions/checkout@v4
    - name: Install Rust
      uses: dtolnay/rust-toolchain@master
      with:
        toolchain: ${{ matrix.rust }}
        targets: x86_64-unknown-linux-musl
    - name: Install cross-compilation tools (Ubuntu)
      if: matrix.os == 'ubuntu-latest'
      run: |
        sudo apt-get update
        sudo apt-get install -y musl-tools
    - name: Install cross-compilation tools (macOS)
      if: matrix.os == 'macos-latest'
      run: |
        # Install musl-cross from the correct tap
        brew install messense/macos-cross-toolchains/x86_64-unknown-linux-musl
        # Set up cargo config for cross-compilation
        mkdir -p ~/.cargo
        echo '[target.x86_64-unknown-linux-musl]' >> ~/.cargo/config.toml
        echo 'linker = "x86_64-unknown-linux-musl-gcc"' >> ~/.cargo/config.toml
    - name: Install cross-compilation tools (Windows)
      if: matrix.os == 'windows-latest'
      shell: pwsh
      run: |
        # On Windows, we'll use rust-lld as the linker for musl targets
        rustup component add llvm-tools-preview
        # Create cargo config directory
        New-Item -ItemType Directory -Force -Path "$env:USERPROFILE\.cargo"
        # Create config file
        Add-Content -Path "$env:USERPROFILE\.cargo\config.toml" -Value "[target.x86_64-unknown-linux-musl]"
        Add-Content -Path "$env:USERPROFILE\.cargo\config.toml" -Value 'linker = "rust-lld"'
    - name: Set up Docker (Windows and macOS)
      if: matrix.os == 'windows-latest' || matrix.os == 'macos-latest'
      uses: docker-practice/actions-setup-docker@v1
    - name: Cache cargo registry
      uses: actions/cache@v4
      with:
        path: ~/.cargo/registry
        key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
    - name: Cache cargo index
      uses: actions/cache@v4
      with:
        path: ~/.cargo/git
        key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
    - name: Cache cargo build
      uses: actions/cache@v4
      with:
        path: target
        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
    - name: Verify cross-compilation setup
      run: |
        echo "Installed targets:"
        rustup target list --installed
        echo "Cargo version:"
        cargo --version
        echo "Rustc version:"
        rustc --version
        echo "Available linkers:"
        which x86_64-unknown-linux-musl-gcc || echo "x86_64-unknown-linux-musl-gcc not found"
        which x86_64-linux-musl-gcc || echo "x86_64-linux-musl-gcc not found"
        which musl-gcc || echo "musl-gcc not found"
        which rust-lld || echo "rust-lld not found"
        echo "Cargo config:"
        cat ~/.cargo/config.toml || echo "No cargo config found"
    - name: Build
      run: cargo build --verbose
    - name: Run unit tests
      run: cargo test --verbose
    - name: Run e2e tests
      run: cargo test --test '*' --verbose

  fmt:
    name: Rustfmt
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - name: Install Rust
      uses: dtolnay/rust-toolchain@stable
      with:
        components: rustfmt
    - name: Check formatting
      run: cargo fmt -- --check

  clippy:
    name: Clippy
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - name: Install Rust
      uses: dtolnay/rust-toolchain@stable
      with:
        components: clippy
    - name: Run clippy
      run: cargo clippy -- -D warnings

  integration:
    name: Integration Test
    runs-on: ubuntu-latest
    needs: [test, fmt, clippy]  # Only run after other tests pass
    services:
      registry:
        image: registry:2
        ports:
          - 5000:5000
    steps:
    - uses: actions/checkout@v4
    - name: Install Rust
      uses: dtolnay/rust-toolchain@stable
      with:
        targets: x86_64-unknown-linux-musl
    - name: Install musl tools
      run: |
        sudo apt-get update
        sudo apt-get install -y musl-tools
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3
    - name: Build krust
      run: cargo build --release
    - name: Add krust to PATH
      run: echo "${{ github.workspace }}/target/release" >> $GITHUB_PATH
    - name: Test krust version
      run: krust version
    - name: Build and run example with krust
      run: |
        cd example/hello-krust
        # Build and push to ttl.sh (ephemeral registry)
        export KRUST_REPO=ttl.sh/${{ github.run_id }}
        IMAGE_REF=$(krust build ./)
        echo "Built image: $IMAGE_REF"
        # Run the image
        docker run --rm $IMAGE_REF
    - name: Test docker run with command substitution
      run: |
        cd example/hello-krust
        export KRUST_REPO=ttl.sh/${{ github.run_id }}-test2
        docker run --rm $(krust build ./)
    - name: Test build with --no-push
      run: |
        cd example/hello-krust
        krust build --no-push --image local.test/hello:latest ./

  # Takes too long to run on CI, so it's commented out for now.
  # coverage:
  #   name: Code coverage
  #   runs-on: ubuntu-latest
  #   steps:
  #   - uses: actions/checkout@v4
  #   - name: Install Rust
  #     uses: dtolnay/rust-toolchain@stable
  #   - name: Install cargo-tarpaulin
  #     run: cargo install cargo-tarpaulin
  #   - name: Generate code coverage
  #     run: cargo tarpaulin --verbose --workspace