name: Docker CI

on:
  pull_request:
    paths:
      - 'docker/**'
      - 'docker-compose.yaml'
      - '.dockerignore'
      - 'chatmaild/**'
      - 'cmdeploy/**'
      - '.github/workflows/docker-ci.yaml'
  push:
    branches:
      - main
      - j4n/docker-pr
    paths:
      - 'docker/**'
      - 'docker-compose.yaml'
      - '.dockerignore'
      - 'chatmaild/**'
      - 'cmdeploy/**'
      - '.github/workflows/docker-ci.yaml'
    tags:
      - 'v*'

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

jobs:
  build:
    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: j4n/docker → :j4n-docker
            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' }}
          load: true
          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"

      - name: Save image as tarball
        run: docker save ${{ steps.image-ref.outputs.image }} | zstd -T0 -o /tmp/chatmail-image.tar.zst

      - name: Upload image artifact
        uses: actions/upload-artifact@v4
        with:
          name: chatmail-image
          path: /tmp/chatmail-image.tar.zst
          retention-days: 1

  deploy:
    name: Deploy docker image to ${{ matrix.host }}
    needs: build
    if: github.event_name == 'push'
    runs-on: ubuntu-latest
    timeout-minutes: 30
    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:
      - uses: actions/checkout@v4

      - name: prepare SSH
        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 ${HOST} > ~/.ssh/known_hosts
          # save previous acme & dkim state
          rsync -avz root@${HOST}:/var/lib/acme/ ${ACME_DIR}/ || true
          rsync -avz root@${HOST}:/etc/dkimkeys/ ${DKIM_DIR}/ || true
          # store previous acme & dkim state on ns.testrun.org, if it contains useful certs
          if [ -f ${DKIM_DIR}/opendkim.private ]; then rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" ${DKIM_DIR} root@ns.testrun.org:/tmp/ || true; fi
          if [ "$(ls -A ${ACME_DIR}/certs 2>/dev/null)" ]; then rsync -avz -e "ssh -o StrictHostKeyChecking=accept-new" ${ACME_DIR} root@ns.testrun.org:/tmp/ || true; fi
          # make sure CAA record isn't set
          scp -o StrictHostKeyChecking=accept-new .github/workflows/${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 ${{ matrix.host }} to have a clean 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
        run: |
          rm ~/.ssh/known_hosts
          while ! ssh -o ConnectTimeout=180 -o StrictHostKeyChecking=accept-new root@${{ matrix.host }} id -u ; do sleep 1 ; done

      - name: install Docker on VPS
        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: restore ACME & DKIM state
        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/${DKIM_DIR} dkimkeys-restore || true
          # restore to acme & dkim state
          rsync -avz acme-restore/${ACME_DIR}/ root@${HOST}:/var/lib/acme/ || true
          rsync -avz dkimkeys-restore/${DKIM_DIR}/ root@${HOST}:/etc/dkimkeys/ || true
          # copy acme & dkim state to docker bind mounts
          ssh root@${HOST} 'mkdir -p /srv/chatmail/certs /srv/chatmail/dkim && cp -a /var/lib/acme/. /srv/chatmail/certs/ && cp -a /etc/dkimkeys/. /srv/chatmail/dkim/'

      - name: generate chatmail.ini
        env:
          HOST: ${{ matrix.host }}
          DISABLE_IPV6: ${{ matrix.disable_ipv6 }}
        run: |
          cmdeploy init ${HOST}
          if [ "${DISABLE_IPV6}" = "true" ]; then
            sed -i 's/disable_ipv6 = False/disable_ipv6 = True/' chatmail.ini
          fi
          sed -i 's/#\s*mtail_address/mtail_address/' chatmail.ini
          scp chatmail.ini root@${HOST}:/srv/chatmail/chatmail.ini

      - name: Download image artifact
        uses: actions/download-artifact@v4
        with:
          name: chatmail-image
          path: /tmp

      - name: upload repo and deploy with Docker
        env:
          HOST: ${{ matrix.host }}
        run: |
          GHCR_IMAGE="${{ needs.build.outputs.image }}"
          rsync -avz --exclude='.git' --exclude='venv' --exclude='__pycache__' ./ root@${HOST}:/srv/chatmail/relay/
          # Load pre-built image from artifact
          zstd -d /tmp/chatmail-image.tar.zst -o /tmp/chatmail-image.tar
          scp /tmp/chatmail-image.tar root@${HOST}:/tmp/chatmail-image.tar
          ssh root@${HOST} "docker load -i /tmp/chatmail-image.tar && rm /tmp/chatmail-image.tar"
          # # Login to GHCR on VPS and pull pre-built image
          # echo "${{ 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 to become healthy
        env:
          HOST: ${{ matrix.host }}
        run: |
          # Stream journald inside the container so we see chatmail-init output in real time
          # (docker logs doesn't work with logging driver: none)
          ssh root@${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
            sleep 5
          done
          echo "Container did not become healthy in time."
          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
        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: add ssh keys to staging server
        if: matrix.add_ssh_keys
        run: ssh root@${{ matrix.host }} 'curl -s https://github.com/hpk42.keys https://github.com/j4n.keys >> .ssh/authorized_keys'

      - name: run deploy-chatmail offline tests
        run: CHATMAIL_DOCKER=chatmail pytest --pyargs cmdeploy

      - name: set DNS entries
        env:
          HOST: ${{ matrix.host }}
          ZONE: ${{ matrix.zone_file }}
        run: |
          ssh root@${HOST} 'docker exec chatmail chown opendkim:opendkim -R /etc/dkimkeys'
          # run cmdeploy dns inside the container
          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: cmdeploy test
        run: CHATMAIL_DOCKER=chatmail CHATMAIL_DOMAIN2=ci-chatmail.testrun.org cmdeploy test --slow

      - name: cmdeploy dns
        run: |
          ssh root@${{ matrix.host }} 'docker exec chatmail cmdeploy dns -v --ssh-host @local'