name: Build & publish Docker image

# Publishes the FireSight container image to GitHub Container Registry
# (ghcr.io/<owner>/<repo>) so the Unraid Community Apps template can pull it.
#
# Triggers:
#   - push to main          -> tags `latest` and `main-<sha>`
#   - push of a v* tag      -> tags `vX.Y.Z`, `X.Y`, `X` and `latest`
#   - manual run            -> tags `latest`
#
# Multi-arch: linux/amd64 (Unraid) + linux/arm64 (Pi / Apple Silicon test).

on:
  push:
    branches: [main]
    tags: ["v*.*.*"]
  workflow_dispatch:

permissions:
  contents: read
  packages: write

concurrency:
  group: docker-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Lowercase image name
        id: img
        run: echo "name=ghcr.io/${GITHUB_REPOSITORY,,}" >> "$GITHUB_OUTPUT"

      - name: Derive tags & labels
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ steps.img.outputs.name }}
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=raw,value=latest,enable={{is_default_branch}}
            type=sha,prefix=main-,enable=${{ github.ref == 'refs/heads/main' }}

      - name: Build & push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max