name: Deploy

on:
  push:
    branches:
      - main
      - j4n/docker-pr
  pull_request:
    paths-ignore:
      - 'scripts/**'
      - '**/README.md'
      - 'CHANGELOG.md'
      - 'LICENSE'

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-docker:
    name: Build Docker image
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    outputs:
      image: ${{ steps.image-ref.outputs.image }}
    steps:
      - uses: actions/checkout@v4

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

      - name: Login to GHCR
        if: github.event_name == 'push'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            # Tagged releases: v1.2.3 -> :1.2.3, :1.2, :latest
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            # Branch pushes: foo/docker-pr -> :foo-docker-pr
            type=ref,event=branch
            # Always: :sha-<hash>
            type=sha

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          file: docker/chatmail_relay.dockerfile
          push: ${{ github.event_name == 'push' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            GIT_HASH=${{ github.sha }}

      - name: Output image reference
        id: image-ref
        run: |
          SHORT_SHA=$(echo "${{ github.sha }}" | cut -c1-7)
          IMAGE="${{ env.REGISTRY }}/$(echo "${{ env.IMAGE_NAME }}" | tr '[:upper:]' '[:lower:]'):sha-${SHORT_SHA}"
          echo "image=${IMAGE}" >> "$GITHUB_OUTPUT"

  deploy:
    name: Deploy to ${{ matrix.host }}
    needs: build-docker
#    if: >- !cancelled() && ( github.event_name == 'push' || (github.event_name == 'pull_request' && !startsWith(github.head_ref, 'j4n/')))
    runs-on: ubuntu-latest
    timeout-minutes: 60
    strategy:
      fail-fast: false
      matrix:
        include:
          - host: staging2.testrun.org
            acme_dir: acme
            dkim_dir: dkimkeys
            zone_file: staging.testrun.org-default.zone
            disable_ipv6: false
            add_ssh_keys: true
          - host: staging-ipv4.testrun.org
            acme_dir: acme-ipv4
            dkim_dir: dkimkeys-ipv4
            zone_file: staging-ipv4.testrun.org-default.zone
            disable_ipv6: true
            add_ssh_keys: false
    environment:
      name: ${{ matrix.host }}
      url: https://${{ matrix.host }}/
    concurrency: ${{ matrix.host }}
    steps:
      # --- Common setup ---

      - uses: actions/checkout@v4

      - name: prepare SSH and save ACME/DKIM
        env:
          HOST: ${{ matrix.host }}
          ACME_DIR: ${{ matrix.acme_dir }}
          DKIM_DIR: ${{ matrix.dkim_dir }}
          ZONE: ${{ matrix.zone_file }}
        run: |
          mkdir ~/.ssh
          echo "${{ secrets.STAGING_SSH_KEY }}" >> ~/.ssh/id_ed25519
          chmod 600 ~/.ssh/id_ed25519
          ssh-keyscan ${HOST} > ~/.ssh/known_hosts
          # save previous acme & dkim state (trailing slash = copy contents)
          rsync -avz root@${HOST}:/var/lib/acme/ ${ACME_DIR}/ || true
          rsync -avz root@${HOST}:/etc/dkimkeys/ ${DKIM_DIR}/ || true
          # backup to ns.testrun.org if contents are useful
          if [ -f ${DKIM_DIR}/opendkim.private ]; then
            rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" ${DKIM_DIR}/ root@ns.testrun.org:/tmp/${DKIM_DIR}/ || true
          fi
          if [ "$(ls -A ${ACME_DIR}/certs 2>/dev/null)" ]; then
            rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" ${ACME_DIR}/ root@ns.testrun.org:/tmp/${ACME_DIR}/ || true
          fi
          # make sure CAA record isn't set
          scp -o StrictHostKeyChecking=accept-new .github/workflows/${ZONE} root@ns.testrun.org:/etc/nsd/${HOST}.zone
          ssh root@ns.testrun.org sed -i '/CAA/d' /etc/nsd/${HOST}.zone
          ssh root@ns.testrun.org nsd-checkzone ${HOST} /etc/nsd/${HOST}.zone
          ssh root@ns.testrun.org systemctl reload nsd

      - name: rebuild VPS
        env:
          SERVER_ID: ${{ matrix.host == 'staging2.testrun.org' && secrets.STAGING_SERVER_ID || secrets.STAGING_IPV4_SERVER_ID }}
        run: |
          curl -X POST \
            -H "Authorization: Bearer ${{ secrets.HETZNER_API_TOKEN }}" \
            -H "Content-Type: application/json" \
            -d '{"image":"debian-12"}' \
            "https://api.hetzner.cloud/v1/servers/${SERVER_ID}/actions/rebuild"

      - run: scripts/initenv.sh
      - name: append venv/bin to PATH
        run: echo venv/bin >>$GITHUB_PATH

      - name: wait for VPS rebuild
        id: wait-for-vps
        env:
          HOST: ${{ matrix.host }}
        run: |
          rm ~/.ssh/known_hosts
          while ! ssh -o ConnectTimeout=180 -o StrictHostKeyChecking=accept-new root@${HOST} id -u ; do sleep 1 ; done

      - name: restore ACME/DKIM
        env:
          HOST: ${{ matrix.host }}
          ACME_DIR: ${{ matrix.acme_dir }}
          DKIM_DIR: ${{ matrix.dkim_dir }}
        run: |
          # download from ns.testrun.org
          rsync -e "ssh -o StrictHostKeyChecking=accept-new" -avz root@ns.testrun.org:/tmp/${ACME_DIR}/ acme-restore/ || true
          rsync -avz root@ns.testrun.org:/tmp/${DKIM_DIR}/ dkimkeys-restore/ || true
          # restore to VPS
          rsync -avz acme-restore/ root@${HOST}:/var/lib/acme/ || true
          rsync -avz dkimkeys-restore/ root@${HOST}:/etc/dkimkeys/ || true
          ssh root@${HOST} chown root:root -R /var/lib/acme || true

      - name: bare offline tests
        if: github.ref == 'refs/heads/main' || github.event_name == 'pull_request'
        run: pytest --pyargs cmdeploy

      - name: bare deploy
        if: github.ref == 'refs/heads/main' || github.event_name == 'pull_request'
        env:
          HOST: ${{ matrix.host }}
          DISABLE_IPV6: ${{ matrix.disable_ipv6 }}
        run: |
          ssh root@${HOST} 'apt update && apt install -y git python3.11-venv python3-dev gcc'
          ssh root@${HOST} 'git clone https://github.com/chatmail/relay'
          ssh root@${HOST} "cd relay && git checkout ${{ github.head_ref || github.ref_name }}"
          ssh root@${HOST} 'cd relay && scripts/initenv.sh'
          ssh root@${HOST} "cd relay && scripts/cmdeploy init ${HOST}"
          if [ "${DISABLE_IPV6}" = "true" ]; then
            ssh root@${HOST} "sed -i 's#disable_ipv6 = False#disable_ipv6 = True#' relay/chatmail.ini"
          fi
          ssh root@${HOST} "sed -i 's/#\s*mtail_address/mtail_address/' relay/chatmail.ini"
          ssh root@${HOST} "cd relay && scripts/cmdeploy run --verbose --skip-dns-check --ssh-host localhost"

      - name: bare DNS
        if: github.ref == 'refs/heads/main' || github.event_name == 'pull_request'
        env:
          HOST: ${{ matrix.host }}
          ZONE: ${{ matrix.zone_file }}
        run: |
          ssh root@${HOST} chown opendkim:opendkim -R /etc/dkimkeys
          ssh root@${HOST} "cd relay && scripts/cmdeploy dns --zonefile staging-generated.zone --ssh-host localhost"
          ssh root@${HOST} cat relay/staging-generated.zone >> .github/workflows/${ZONE}
          cat .github/workflows/${ZONE}
          scp .github/workflows/${ZONE} root@ns.testrun.org:/etc/nsd/${HOST}.zone
          ssh root@ns.testrun.org nsd-checkzone ${HOST} /etc/nsd/${HOST}.zone
          ssh root@ns.testrun.org systemctl reload nsd

      - name: bare integration tests
        if: github.ref == 'refs/heads/main' || github.event_name == 'pull_request'
        env:
          HOST: ${{ matrix.host }}
        run: ssh root@${HOST} "cd relay && CHATMAIL_DOMAIN2=ci-chatmail.testrun.org scripts/cmdeploy test --slow --ssh-host localhost"

      - name: bare final DNS check
        if: github.ref == 'refs/heads/main' || github.event_name == 'pull_request'
        env:
          HOST: ${{ matrix.host }}
        run: ssh root@${HOST} "cd relay && scripts/cmdeploy dns -v --ssh-host localhost"

      # --- Docker deploy (push only, runs even if bare failed) ---

      - name: stop bare services
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: |
          ssh root@${HOST} 'systemctl stop postfix dovecot nginx opendkim unbound filtermail doveauth chatmail-metadata iroh-relay mtail fcgiwrap acmetool 2>/dev/null || true'

      - name: install Docker on VPS
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: |
          ssh root@${HOST} 'apt-get update && apt-get install -y ca-certificates curl'
          ssh root@${HOST} 'install -m 0755 -d /etc/apt/keyrings'
          ssh root@${HOST} 'curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc && chmod a+r /etc/apt/keyrings/docker.asc'
          ssh root@${HOST} 'echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian $(. /etc/os-release && echo $VERSION_CODENAME) stable" > /etc/apt/sources.list.d/docker.list'
          ssh root@${HOST} 'apt-get update && apt-get install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin'

      - name: prepare Docker bind mounts
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: |
          ssh root@${HOST} 'mkdir -p /srv/chatmail/certs /srv/chatmail/dkim'
          ssh root@${HOST} 'cp -a /var/lib/acme/. /srv/chatmail/certs/ && cp -a /etc/dkimkeys/. /srv/chatmail/dkim/' || true

      - name: generate and upload chatmail.ini
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: |
          cmdeploy init ${HOST}
          sed -i 's/#\s*mtail_address/mtail_address/' chatmail.ini
          scp chatmail.ini root@${HOST}:/srv/chatmail/chatmail.ini

      - name: deploy with Docker
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: |
          GHCR_IMAGE="${{ needs.build-docker.outputs.image }}"
          rsync -avz --exclude='.git' --exclude='venv' --exclude='__pycache__' ./ root@${HOST}:/srv/chatmail/relay/
          # Login to GHCR on VPS and pull pre-built image
          echo "${{ secrets.GITHUB_TOKEN }}" | ssh root@${HOST} 'docker login ghcr.io -u ${{ github.actor }} --password-stdin'
          ssh root@${HOST} "docker pull ${GHCR_IMAGE}"
          ssh root@${HOST} "cd /srv/chatmail/relay && CHATMAIL_IMAGE=${GHCR_IMAGE} MAIL_DOMAIN=${HOST} docker compose -f docker-compose.yaml -f docker/docker-compose.ci.yaml up -d"

      - name: wait for container healthy
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: |
          # Stream journald inside the container
          ssh root@${HOST} 'docker exec chatmail journalctl -f --no-pager' &
          LOG_PID=$!
          trap "kill $LOG_PID 2>/dev/null || true" EXIT
          for i in $(seq 1 60); do
            status=$(ssh root@${HOST} 'docker inspect --format={{.State.Health.Status}} chatmail 2>/dev/null' || echo "missing")
            echo "  [$i/60] status=$status"
            if [ "$status" = "healthy" ]; then
              echo "Container is healthy."
              exit 0
            fi
            if [ "$status" = "unhealthy" ]; then
              echo "Container is unhealthy!"
              break
            fi
            sleep 5
          done
          echo "Container did not become healthy."
          kill $LOG_PID 2>/dev/null || true
          echo "--- failed units ---"
          ssh root@${HOST} 'docker exec chatmail systemctl --failed --no-pager' || true
          echo "--- service logs ---"
          ssh root@${HOST} 'docker exec chatmail journalctl -u dovecot -u postfix -u nginx -u unbound --no-pager -n 50' || true
          echo "--- listening ports ---"
          ssh root@${HOST} 'docker exec chatmail ss -tlnp' || true
          echo "--- chatmail.ini ---"
          ssh root@${HOST} 'docker exec chatmail cat /etc/chatmail/chatmail.ini' || true
          exit 1

      - name: show container state
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: |
          echo "--- listening ports ---"
          ssh root@${HOST} 'docker exec chatmail ss -tlnp'
          echo "--- chatmail.ini ---"
          ssh root@${HOST} 'docker exec chatmail cat /etc/chatmail/chatmail.ini'

      - name: Docker offline tests
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        run: CHATMAIL_DOCKER=chatmail pytest --pyargs cmdeploy

      - name: Docker DNS
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
          ZONE: ${{ matrix.zone_file }}
        run: |
          # Reset zone file in case bare DNS already appended to it
          git checkout .github/workflows/${ZONE}
          ssh root@${HOST} 'docker exec chatmail chown opendkim:opendkim -R /etc/dkimkeys'
          ssh root@${HOST} 'docker exec chatmail cmdeploy dns --ssh-host @local --zonefile /opt/chatmail/staging.zone --verbose'
          ssh root@${HOST} 'docker cp chatmail:/opt/chatmail/staging.zone /tmp/staging.zone'
          scp root@${HOST}:/tmp/staging.zone staging-generated.zone
          cat staging-generated.zone >> .github/workflows/${ZONE}
          cat .github/workflows/${ZONE}
          scp .github/workflows/${ZONE} root@ns.testrun.org:/etc/nsd/${HOST}.zone
          ssh root@ns.testrun.org nsd-checkzone ${HOST} /etc/nsd/${HOST}.zone
          ssh root@ns.testrun.org systemctl reload nsd

      - name: Docker integration tests
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        run: CHATMAIL_DOCKER=chatmail CHATMAIL_DOMAIN2=ci-chatmail.testrun.org cmdeploy test --slow

      - name: Docker final DNS check
        if: >-
          !cancelled() && github.event_name == 'push'
          && steps.wait-for-vps.outcome == 'success'
        env:
          HOST: ${{ matrix.host }}
        run: ssh root@${HOST} 'docker exec chatmail cmdeploy dns -v --ssh-host @local'

      # --- Cleanup ---

      - name: add SSH keys
        if: >-
          !cancelled() && matrix.add_ssh_keys
          && steps.wait-for-vps.outcome == 'success'
        run: ssh root@${{ matrix.host }} 'curl -s https://github.com/hpk42.keys https://github.com/j4n.keys >> .ssh/authorized_keys'