# Runs only on pushes to main.
# Builds the Docker image and pushes it to the Forgejo container registry.
# Registry-side layer caching means unchanged layers (npm install, pip install)
# are reused between builds — typically cuts build time from ~4 min to ~45 sec.
#
# The resulting image can then be deployed manually via Portainer.
#
# Required secrets (repo → Settings → Secrets → Actions):
#   REGISTRY_USER   — your Forgejo username
#   REGISTRY_TOKEN  — Forgejo PAT with write:packages scope (create at
#                     git.fabledsword.com → Settings → Applications → Generate Token)
name: Build & push image

on:
  push:
    branches: [main]
    paths:
      - "src/**"
      - "frontend/**"
      - "Dockerfile"
      - "pyproject.toml"
      - "alembic/**"
      - "alembic.ini"
      - ".forgejo/workflows/build.yml"

env:
  REGISTRY: git.fabledsword.com
  IMAGE: git.fabledsword.com/bvandeusen/fabledassistant

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

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

      - name: Log in to Forgejo registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_TOKEN }}

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