name: docker-build-push

on:
  push:
    branches: [main]
  workflow_dispatch:

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

      - name: Build and push image via the admin host
        env:
          ADMIN_HOST_SSH_KEY: ${{ secrets.ADMIN_HOST_SSH_KEY }}
          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
        run: |
          mkdir -p ~/.ssh
          printf '%s\n' "$ADMIN_HOST_SSH_KEY" > ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          ssh-keyscan -H host.docker.internal >> ~/.ssh/known_hosts 2>/dev/null

          SHA="${{ github.sha }}"
          REMOTE_DIR="/tmp/ci-yttrx-welcomebot-$SHA"
          IMAGE="gitea.blairhaus.net/pmb/yttrx-welcomebot"

          tar czf - --exclude=.git . | ssh -i ~/.ssh/id_ed25519 pmb@host.docker.internal \
            "mkdir -p $REMOTE_DIR && tar xzf - -C $REMOTE_DIR"

          ssh -i ~/.ssh/id_ed25519 pmb@host.docker.internal bash -s <<EOF
          set -euo pipefail
          cd "$REMOTE_DIR"
          echo "==> [host] building $IMAGE:$SHA"
          docker build -t "$IMAGE:$SHA" -t "$IMAGE:latest" .
          printf '%s' "$REGISTRY_TOKEN" | docker login gitea.blairhaus.net -u pmb --password-stdin
          docker push "$IMAGE:$SHA"
          docker push "$IMAGE:latest"
          docker logout gitea.blairhaus.net
          rm -rf "$REMOTE_DIR"
          EOF

          echo "pushed $IMAGE:$SHA and $IMAGE:latest"