name: php-fpm-build

on:
  push:
    branches: [main]
    paths:
      - "php-fpm/**"
      - "shared/php-fpm/**"
      - ".github/workflows/php-fpm.yml"
  pull_request:
    branches: [main]
    paths:
      - "php-fpm/**"
      - "shared/php-fpm/**"
      - ".github/workflows/php-fpm.yml"
  workflow_dispatch:
    inputs:
      lane:
        description: 'Lane to build (e.g. 7.4). Use "all" to build all lanes. Leave blank to build based on changes.'
        required: false
        default: ""

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        lane: ["7.4"]

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check for file changes
        id: changes
        uses: tj-actions/changed-files@v44
        with:
          files: |
            .github/workflows/php-fpm.yml
            shared/php-fpm/**
            php-fpm/${{ matrix.lane }}/**

      - name: Set build flag
        id: build-flag
        run: |
          if [[ "${{ steps.changes.outputs.any_changed }}" == 'true' || "${{ github.event.inputs.lane }}" == 'all' || "${{ github.event.inputs.lane }}" == "${{ matrix.lane }}" ]]; then
            echo "should_build=true"
          else
            echo "should_build=false"
          fi >> $GITHUB_OUTPUT
        shell: bash

      - name: Set up Docker Buildx
        if: steps.build-flag.outputs.should_build == 'true'
        uses: docker/setup-buildx-action@v3

      - name: Log in to the Container Registry
        if: steps.build-flag.outputs.should_build == 'true'
        uses: docker/login-action@v3
        with:
          registry: gitea.auvem.com
          username: ${{ vars.REGISTRY_USER || github.actor }}
          password: ${{ secrets.REGISTRY_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        if: steps.build-flag.outputs.should_build == 'true'
        uses: docker/metadata-action@v5
        with:
          images: gitea.auvem.com/auvem/wordpress-docker/php-fpm
          tags: |
            type=raw,value=${{ matrix.lane }}-latest
            type=raw,value=${{ matrix.lane }}-${{ github.sha }}

      - name: Build and push Docker image
        if: steps.build-flag.outputs.should_build == 'true'
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./php-fpm/${{ matrix.lane }}/Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/amd64

      - name: Report build status
        if: steps.build-flag.outputs.should_build == 'false'
        run: echo "Skipping build for ${{ matrix.lane }}. No relevant changes detected."