name: deploy docs

on:
  push:
    branches:
      - main
      - canary
    paths:
      - fluxer_docs/**
      - .github/workflows/deploy-docs.yaml
  workflow_dispatch:
    inputs:
      channel:
        type: choice
        options:
          - stable
          - canary
        default: stable
        description: Channel to deploy
      ref:
        type: string
        required: false
        default: ''
        description: Optional git ref to deploy (defaults to main/canary based on channel)

concurrency:
  group: deploy-fluxer-docs-${{ github.event_name == 'workflow_dispatch' && inputs.channel || (github.ref_name == 'canary' && 'canary') || 'stable' }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  channel-vars:
    uses: ./.github/workflows/channel-vars.yaml
    with:
      github_event_name: ${{ github.event_name }}
      github_ref_name: ${{ github.ref_name }}
      github_ref: ${{ github.ref }}
      workflow_dispatch_channel: ${{ github.event_name == 'workflow_dispatch' && inputs.channel || '' }}
      workflow_dispatch_ref: ${{ github.event_name == 'workflow_dispatch' && inputs.ref || '' }}

  deploy:
    name: Deploy docs
    needs: channel-vars
    runs-on: blacksmith-2vcpu-ubuntu-2404
    timeout-minutes: 10
    env:
      CHANNEL: ${{ needs.channel-vars.outputs.channel }}
      IS_CANARY: ${{ needs.channel-vars.outputs.is_canary }}
      SOURCE_REF: ${{ needs.channel-vars.outputs.source_ref }}
      STACK_SUFFIX: ${{ needs.channel-vars.outputs.stack_suffix }}

      STACK: ${{ format('fluxer-docs{0}', needs.channel-vars.outputs.stack_suffix) }}
      CACHE_SCOPE: ${{ format('deploy-fluxer-docs{0}', needs.channel-vars.outputs.stack_suffix) }}

      CADDY_DOMAIN: ${{ needs.channel-vars.outputs.is_canary == 'true' && 'docs.canary.fluxer.app' || 'docs.fluxer.app' }}

    steps:
      - uses: actions/checkout@v6
        with:
          ref: ${{ env.SOURCE_REF }}
          fetch-depth: 0

      - name: Record deploy commit
        run: |
          set -euo pipefail
          sha=$(git rev-parse HEAD)
          echo "Deploying commit ${sha}"
          printf 'DEPLOY_SHA=%s\n' "$sha" >> "$GITHUB_ENV"

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

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_PASSWORD }}

      - name: Build image
        uses: docker/build-push-action@v6
        with:
          context: fluxer_docs
          file: fluxer_docs/Dockerfile
          tags: ${{ env.STACK }}:${{ env.DEPLOY_SHA }}
          load: true
          platforms: linux/amd64
          cache-from: type=gha,scope=${{ env.CACHE_SCOPE }}
          cache-to: type=gha,mode=max,scope=${{ env.CACHE_SCOPE }}
        env:
          DOCKER_BUILD_SUMMARY: false
          DOCKER_BUILD_RECORD_UPLOAD: false

      - name: Install docker-pussh
        run: |
          set -euo pipefail
          mkdir -p ~/.docker/cli-plugins
          curl -fsSL https://raw.githubusercontent.com/psviderski/unregistry/v0.3.1/docker-pussh \
            -o ~/.docker/cli-plugins/docker-pussh
          chmod +x ~/.docker/cli-plugins/docker-pussh

      - name: Set up SSH agent
        uses: webfactory/ssh-agent@v0.9.1
        with:
          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY_SERVER }}

      - name: Add server to known hosts
        run: |
          set -euo pipefail
          mkdir -p ~/.ssh
          ssh-keyscan -H ${{ secrets.SERVER_IP }} >> ~/.ssh/known_hosts

      - name: Push image and deploy
        env:
          IMAGE_TAG: ${{ env.STACK }}:${{ env.DEPLOY_SHA }}
          SERVER: ${{ secrets.SERVER_USER }}@${{ secrets.SERVER_IP }}
          STACK: ${{ env.STACK }}
          CADDY_DOMAIN: ${{ env.CADDY_DOMAIN }}
          IS_CANARY: ${{ env.IS_CANARY }}
        run: |
          set -euo pipefail
          docker pussh "${IMAGE_TAG}" "${SERVER}"

          ssh "${SERVER}" "IMAGE_TAG=${IMAGE_TAG} STACK=${STACK} CADDY_DOMAIN=${CADDY_DOMAIN} IS_CANARY=${IS_CANARY} bash" << 'EOF'
          set -euo pipefail

          sudo mkdir -p "/opt/${STACK}"
          sudo chown -R "${USER}:${USER}" "/opt/${STACK}"
          cd "/opt/${STACK}"

          cat > compose.yaml << COMPOSEEOF
          x-deploy-base: &deploy_base
            restart_policy:
              condition: on-failure
              delay: 5s
              max_attempts: 3
            update_config:
              parallelism: 1
              delay: 10s
              order: start-first
            rollback_config:
              parallelism: 1
              delay: 10s

          services:
            app:
              image: ${IMAGE_TAG}
              env_file:
                - /etc/fluxer/fluxer.env
              environment:
                - NODE_ENV=production
              deploy:
                <<: *deploy_base
                replicas: 2
                labels:
                  caddy: "${CADDY_DOMAIN}"
                  caddy.reverse_proxy: "{{upstreams 3000}}"
          COMPOSEEOF

          if [[ "${IS_CANARY}" == "true" ]]; then
            cat >> compose.yaml << 'COMPOSEEOF'
                  caddy.header.X-Robots-Tag: "noindex, nofollow, nosnippet, noimageindex"
          COMPOSEEOF
          fi

          cat >> compose.yaml << 'COMPOSEEOF'
                  caddy.header.Strict-Transport-Security: "max-age=31536000; includeSubDomains; preload"
                  caddy.header.X-Xss-Protection: "1; mode=block"
                  caddy.header.X-Content-Type-Options: "nosniff"
                  caddy.header.Referrer-Policy: "strict-origin-when-cross-origin"
                  caddy.header.X-Frame-Options: "DENY"
              networks:
                - fluxer-shared
              healthcheck:
                test: ['CMD', 'curl', '-f', 'http://localhost:3000']
                interval: 30s
                timeout: 10s
                retries: 3
                start_period: 40s

          networks:
            fluxer-shared:
              external: true
          COMPOSEEOF

          docker stack deploy \
            --with-registry-auth \
            --detach=false \
            --resolve-image never \
            -c compose.yaml \
            "${STACK}"
          EOF
