name: Build & Push Docker

on:
  push:
    branches: [ "main" ]
  workflow_dispatch:

jobs:
  build:
    runs-on: [rke2]   # tvůj Gitea runner
    env:
       REGISTRY: git.apps.sukany.cz

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Lowercase image name (owner/repo)
        run: |
          IMAGE_PATH="$(echo "${{ github.repository }}" | tr '[:upper:]' '[:lower:]')"
          echo "IMAGE=${{ env.REGISTRY }}/${IMAGE_PATH}" >> $GITHUB_ENV
          echo "TAG_SHA=${{ github.sha }}" >> $GITHUB_ENV
          echo "TAG_BRANCH=$(echo "${{ github.ref_name }}" | tr '/' '-')" >> $GITHUB_ENV

      - name: Setup Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Gitea Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.CR_USER }}
          password: ${{ secrets.CR_PAT }}

      - name: Build & Push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ${{ env.IMAGE }}:latest
            ${{ env.IMAGE }}:${{ env.TAG_BRANCH }}
            ${{ env.IMAGE }}:${{ env.TAG_SHA }}
          cache-from: type=registry,ref=${{ env.IMAGE }}:buildcache
          cache-to: type=registry,ref=${{ env.IMAGE }}:buildcache,mode=max