name: Build and Push Docker Images

on:
  push:
    branches: [main]
    paths:
      - 'images/**'
  workflow_dispatch:
    inputs:
      image:
        description: 'Image to build (e.g., terraform-ci). Leave empty to build all.'
        required: false
        default: ''

env:
  REGISTRY: gitea.arnodo.fr

jobs:
  build:
    runs-on: docker
    container:
      image: docker:cli
    steps:
      - name: Install dependencies
        run: apk add --no-cache git

      - name: Checkout repository
        run: |
          git clone --depth 2 https://gitea.arnodo.fr/${{ gitea.repository }}.git .
          git checkout ${{ gitea.sha }}

      - name: Detect images to build
        id: detect
        run: |
          echo "Event: ${{ gitea.event_name }}"
          
          if [ "${{ gitea.event_name }}" = "workflow_dispatch" ]; then
            if [ -n "${{ inputs.image }}" ]; then
              # Manual trigger with specific image
              echo "Manual trigger - building specific image: ${{ inputs.image }}"
              IMAGES="${{ inputs.image }}"
            else
              # Manual trigger without input = build all
              echo "Manual trigger - building all images"
              IMAGES=""
              for dir in images/*/; do
                if [ -f "${dir}Dockerfile" ]; then
                  name=$(basename "$dir")
                  echo "Found image: $name"
                  IMAGES="${IMAGES}${name} "
                fi
              done
            fi
          else
            # Push event = detect changes only
            echo "Push event - detecting changes"
            IMAGES=$(git diff --name-only HEAD~1 HEAD -- images/ 2>/dev/null | cut -d'/' -f2 | sort -u | grep -v '^$' | tr '\n' ' ')
          fi
          
          echo "Images to build: $IMAGES"
          echo "images=$IMAGES" >> $GITHUB_OUTPUT

      - name: Login to Registry
        run: |
          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login ${{ env.REGISTRY }} -u ${{ gitea.actor }} --password-stdin

      - name: Build and Push all images
        run: |
          IMAGES="${{ steps.detect.outputs.images }}"
          
          if [ -z "$IMAGES" ]; then
            echo "No images to build"
            exit 0
          fi
          
          for IMAGE in $IMAGES; do
            IMAGE_NAME="${{ env.REGISTRY }}/damien/${IMAGE}"
            IMAGE_PATH="images/${IMAGE}"
            
            # Validate image path exists
            if [ ! -d "$IMAGE_PATH" ]; then
              echo "❌ Error: Directory $IMAGE_PATH does not exist"
              exit 1
            fi
            
            if [ ! -f "$IMAGE_PATH/Dockerfile" ]; then
              echo "❌ Error: Dockerfile not found in $IMAGE_PATH"
              exit 1
            fi
            
            echo "========================================"
            echo "Building ${IMAGE_NAME}:latest"
            echo "========================================"
            
            docker build -t "${IMAGE_NAME}:latest" "${IMAGE_PATH}"
            docker push "${IMAGE_NAME}:latest"
            
            echo "✅ Pushed ${IMAGE_NAME}:latest"
          done