name: "Build Zola site for GitHub Pages"
description: "Build a Zola site using a specific Zola version and upload a GitHub Pages artifact."

inputs:
  zola_version:
    description: "Zola version tag (e.g. v0.22.0)"
    required: true

  working_directory:
    description: "Directory containing config.toml"
    required: false
    default: "."

  output_dir:
    description: "Zola output directory"
    required: false
    default: "public"

  build_flags:
    description: "Extra flags passed to `zola build`"
    required: false
    default: ""

  check_links:
    description: "Run `zola check` before building"
    required: false
    default: "false"

  check_flags:
    description: "Extra flags passed to `zola check`"
    required: false
    default: ""

runs:
  using: "composite"
  steps:
    - name: Validate Zola version
      shell: bash
      run: |
        set -euo pipefail
        v="${{ inputs.zola_version }}"
        if [[ ! "$v" =~ ^v[0-9]+\.[0-9]+\.[0-9]+([\-+].*)?$ ]]; then
          echo "Invalid zola_version: '$v' (expected e.g. v0.22.0)" >&2
          exit 1
        fi

    - name: Build site with Zola
      shell: bash
      run: |
        set -euo pipefail
        image="ghcr.io/getzola/zola:${{ inputs.zola_version }}"
        echo "Using image: $image"

        if [[ "${{ inputs.check_links }}" == "true" ]]; then
          docker run --rm \
            -v "${{ github.workspace }}":/workspace \
            -w "/workspace/${{ inputs.working_directory }}" \
            "$image" check ${{ inputs.check_flags }}
        fi

        docker run --rm \
          -v "${{ github.workspace }}":/workspace \
          -w "/workspace/${{ inputs.working_directory }}" \
          "$image" build ${{ inputs.build_flags }}

    - name: Upload GitHub Pages artifact
      uses: actions/upload-pages-artifact@7b1f4a764d45c48632c6b24a0339c27f5614fb0b
      with:
        path: ${{ inputs.working_directory }}/${{ inputs.output_dir }}