name: Build & Push Docker Image

env:
  REGISTRY: git.revwal.de

on:
  push:
    branches:
      - main
      - master
    tags:
      - "v*"
  workflow_dispatch: # allow manual runs from the Gitea UI

jobs:
  build-and-push:
    name: Build and push
    runs-on: ubuntu-latest

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

      # ── Docker setup ────────────────────────────────────────────────────────
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      # ── Authenticate to the Gitea container registry ────────────────────────
      - name: Log in to Gitea container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ gitea.actor }}
          password: ${{ secrets.GITEATOKEN }}

      # ── Tag strategy ────────────────────────────────────────────────────────
      # Produces:
      #   • latest           – on every push to the default branch
      #   • <branch-name>    – on every push to a non-default branch
      #   • v1.2.3 / 1.2    – on version tags (v*)
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ gitea.repository }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      # ── Build and push ───────────────────────────────────────────────────────
      # Layer cache is stored in the Gitea/act_runner GHA cache so the slow
      # cargo-leptos compilation is reused across runs when nothing changes.
      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max