# Runs only on pushes to main.
# Builds the Docker image, pushes it to the Forgejo container registry,
# then SSHes into the deploy host and restarts the service.
#
# Required secrets (set in Forgejo repo → Settings → Secrets):
#   REGISTRY_USER    — your Forgejo username
#   REGISTRY_TOKEN   — Forgejo personal access token (write:packages scope)
#   DEPLOY_HOST      — hostname or IP of the server running the app
#   DEPLOY_USER      — SSH username on that server
#   DEPLOY_SSH_KEY   — private SSH key (the public key must be in authorized_keys on the server)
#   DEPLOY_PATH      — absolute path to the directory containing docker-compose.yml
name: Build & Deploy

on:
  push:
    branches: [main]

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

jobs:
  build:
    name: Build & push image
    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 }}
          # Registry-side layer cache — dramatically speeds up rebuilds.
          # On first run there is no cache so it builds cold; after that
          # unchanged layers (npm install, pip install) are reused.
          cache-from: type=registry,ref=${{ env.IMAGE }}:cache
          cache-to: type=registry,ref=${{ env.IMAGE }}:cache,mode=max

  deploy:
    name: Deploy
    needs: build
    runs-on: ubuntu-latest
    steps:
      - name: Pull new image and restart
        uses: appleboy/ssh-action@v1
        with:
          host: ${{ secrets.DEPLOY_HOST }}
          username: ${{ secrets.DEPLOY_USER }}
          key: ${{ secrets.DEPLOY_SSH_KEY }}
          script: |
            set -e
            cd ${{ secrets.DEPLOY_PATH }}
            echo "${{ secrets.REGISTRY_TOKEN }}" | docker login git.fabledsword.com \
              -u "${{ secrets.REGISTRY_USER }}" --password-stdin
            docker compose pull app
            docker compose up -d --no-build app
            docker image prune -f