name: Setup Zig
description: Install Zig compiler

inputs:
  version:
    description: Zig version
    required: true

runs:
  using: composite
  steps:
    - name: Determine platform
      id: platform
      shell: bash
      run: |
        case "${{ runner.os }}-${{ runner.arch }}" in
          Linux-X64)   echo "slug=x86_64-linux" >> $GITHUB_OUTPUT; echo "ext=tar.xz" >> $GITHUB_OUTPUT ;;
          Linux-ARM64) echo "slug=aarch64-linux" >> $GITHUB_OUTPUT; echo "ext=tar.xz" >> $GITHUB_OUTPUT ;;
          macOS-X64)   echo "slug=x86_64-macos" >> $GITHUB_OUTPUT; echo "ext=tar.xz" >> $GITHUB_OUTPUT ;;
          macOS-ARM64) echo "slug=aarch64-macos" >> $GITHUB_OUTPUT; echo "ext=tar.xz" >> $GITHUB_OUTPUT ;;
          Windows-X64) echo "slug=x86_64-windows" >> $GITHUB_OUTPUT; echo "ext=zip" >> $GITHUB_OUTPUT ;;
          *) echo "Unsupported platform: ${{ runner.os }}-${{ runner.arch }}" >&2; exit 1 ;;
        esac
        echo "install_path=$RUNNER_TEMP/zig" >> $GITHUB_OUTPUT

    - name: Cache Zig
      id: cache
      uses: actions/cache@v4
      with:
        path: ${{ steps.platform.outputs.install_path }}
        key: zig-${{ steps.platform.outputs.slug }}-${{ inputs.version }}

    - name: Download and install Zig
      if: steps.cache.outputs.cache-hit != 'true'
      shell: bash
      run: |
        cd "$RUNNER_TEMP"
        URL="https://ziglang.org/download/${{ inputs.version }}/zig-${{ steps.platform.outputs.slug }}-${{ inputs.version }}.${{ steps.platform.outputs.ext }}"
        echo "Downloading: $URL"
        curl -fSL -o zig.${{ steps.platform.outputs.ext }} "$URL"
        ls -la zig.${{ steps.platform.outputs.ext }}
        if [[ "${{ steps.platform.outputs.ext }}" == "zip" ]]; then
          unzip -q zig.${{ steps.platform.outputs.ext }}
        else
          tar -xJf zig.${{ steps.platform.outputs.ext }}
        fi

        INSTALL_PATH="${{ steps.platform.outputs.install_path }}"
        mkdir -p "$(dirname "$INSTALL_PATH")"
        mv zig-${{ steps.platform.outputs.slug }}-${{ inputs.version }} "$INSTALL_PATH"

    - name: Add to PATH
      shell: bash
      run: echo "${{ steps.platform.outputs.install_path }}" >> $GITHUB_PATH