name: Podman Rootless Demo
on: [push, pull_request]

jobs:
  test-backend:
    runs-on: [ci]
    if: false

    # Point all steps at the host's rootless Podman socket
    env:
      # Point the client at the mounted socket
      CONTAINER_HOST: unix:///run/user/1001/podman/podman.sock
      # Make sure podman looks in the correct runtime dir hierarchy
      XDG_RUNTIME_DIR: /tmp
      RUN_ID: ${{ github.run_id }}
      POSTGRES_IMG_DIGEST: ${{ secrets.POSTGRES_IMG_DIGEST }}
      RUST_IMG_DIGEST: ${{ secrets.RUST_IMG_DIGEST }}
      PREBUILT_BACKEND_TEST_IMAGE: ${{ secrets.REGISTRY_HOST }}/${{ github.repository }}/sharenet-test-rust
      CACHE_REPO: ${{ secrets.REGISTRY_HOST }}/${{ github.repository }}/sharenet-test-rust-cache

    steps:
      - name: Checkout code
        uses: actions/checkout@v4


      - name: Verify socket visibility
        run: |
          set -euo pipefail
          id -u; id -g
          ls -ld /run/user/1001/podman
          ls -l  /run/user/1001/podman/podman.sock
          test -S /run/user/1001/podman/podman.sock

      - name: Use host rootless Podman
        run: |
          set -euo pipefail
          podman --remote info --format '{{.Host.RemoteSocket.Path}} (remote={{.Host.RemoteSocket.Exists}})'
          podman --remote version
          podman --remote run --rm alpine:3.20 echo "Hello from host rootless Podman!"

      - name: Login to container registry with PAT
        run: |
          echo "${{ secrets.REGISTRY_TOKEN }}" | podman --remote login \
            -u "${{ secrets.REGISTRY_USERNAME }}" \
            --password-stdin \
            "${{ secrets.REGISTRY_HOST }}"

      - name: Create network
        run: podman --remote network create integ-${{ env.RUN_ID }}

      - name: Generate cache key from lockfile
        id: cache-key
        run: |
          cd "$GITHUB_WORKSPACE/backend"
          LOCK_HASH=$(sha256sum Cargo.lock | cut -d' ' -f1)
          SHORT_HASH=$(echo "$LOCK_HASH" | cut -c1-12)
          echo "cache_key=$SHORT_HASH" >> $GITHUB_OUTPUT
          echo "Using cache key: $SHORT_HASH"

      - name: Build dependencies cache image
        run: |
          # Build deps stage with layer caching
          podman --remote build \
            --layers \
            --cache-to   "$CACHE_REPO" \
            --cache-from "$CACHE_REPO" \
            --target deps \
            -f Dockerfile.test-rust \
            -t "$PREBUILT_BACKEND_TEST_IMAGE:deps-${{ steps.cache-key.outputs.cache_key }}" \
            backend
          
          podman --remote push \
            "$PREBUILT_BACKEND_TEST_IMAGE:deps-${{ steps.cache-key.outputs.cache_key }}"

      - name: Build full test image with cached dependencies
        run: |
          # Build final image using cached deps
          podman --remote build \
            --layers \
            --cache-from "$CACHE_REPO" \
            --target runner \
            -f Dockerfile.test-rust \
            -t "$PREBUILT_BACKEND_TEST_IMAGE:test-${{ github.sha }}" \
            backend

      - name: Start PostgreSQL
        run: |  
          podman --remote run -d \
            --name test-postgres-${{ env.RUN_ID }} \
            --network integ-${{ env.RUN_ID }} \
            -e POSTGRES_PASSWORD=password \
            -e POSTGRES_USER=postgres \
            -e POSTGRES_DB=sharenet_test \
            "$POSTGRES_IMG_DIGEST"

      - name: Wait for PostgreSQL
        run: |
          timeout 60 bash -euc '
            until podman --remote exec test-postgres-${{ env.RUN_ID }} \
              pg_isready -h 127.0.0.1 -p 5432 -U postgres; do
              sleep 1
            done
          '

      - name: Ensure host Cargo cache directory exists
        run: |
          podman --remote run --rm \
            -v /home/ci-service/.cache:/c \
            alpine:3.20 sh -lc 'mkdir -p /c/cargo'

      - name: Run backend tests
        run: |
          # Run tests in the pre-built test image
          podman --remote run --rm \
            --network integ-${{ env.RUN_ID }} \
            -e DATABASE_URL=postgres://postgres:password@test-postgres-${{ env.RUN_ID }}:5432/sharenet_test \
            "$PREBUILT_BACKEND_TEST_IMAGE:test-${{ github.sha }}"

      - name: Cleanup
        if: always()
        run: |
          podman --remote rm -f test-postgres-${{ env.RUN_ID }} 2>/dev/null || true
          podman --remote network rm integ-${{ env.RUN_ID }} 2>/dev/null || true

      - name: Debug DB (on failure)
        if: failure()
        run: podman --remote logs --tail=200 test-postgres-${{ env.RUN_ID }} || true

  test-frontend:
    runs-on: [ci]
    if: false
    #needs: test-backend

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Pass-through (no frontend tests yet)
        run: echo "Frontend tests placeholder - no tests implemented yet"

  build-backend:
    runs-on: [ci]
    if: false
    #needs: [test-backend, test-frontend]
    needs: [test-frontend]

    env:
      CONTAINER_HOST: unix:///run/user/1001/podman/podman.sock
      XDG_RUNTIME_DIR: /tmp
      RUN_ID: ${{ github.run_id }}
      BACKEND_IMAGE: ${{ secrets.REGISTRY_HOST }}/${{ github.repository }}/sharenet-backend-api-postgres

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Login to container registry with PAT
        run: |
          echo "${{ secrets.REGISTRY_TOKEN }}" | podman --remote login \
            -u "${{ secrets.REGISTRY_USERNAME }}" \
            --password-stdin \
            "${{ secrets.REGISTRY_HOST }}"

      - name: Build backend container image
        run: |
          podman --remote build \
            -f backend/Dockerfile \
            -t "$BACKEND_IMAGE:${{ github.sha }}" \
            -t "$BACKEND_IMAGE:latest" \
            backend

      - name: Push backend container image
        run: |
          podman --remote push "$BACKEND_IMAGE:${{ github.sha }}"
          podman --remote push "$BACKEND_IMAGE:latest"

  build-frontend:
    runs-on: [ci]
    if: false
    #needs: [test-backend, test-frontend]
    needs: [test-frontend]

    env:
      CONTAINER_HOST: unix:///run/user/1001/podman/podman.sock
      XDG_RUNTIME_DIR: /tmp
      RUN_ID: ${{ github.run_id }}
      FRONTEND_IMAGE: ${{ secrets.REGISTRY_HOST }}/${{ github.repository }}/sharenet-frontend

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Login to container registry with PAT
        run: |
          echo "${{ secrets.REGISTRY_TOKEN }}" | podman --remote login \
            -u "${{ secrets.REGISTRY_USERNAME }}" \
            --password-stdin \
            "${{ secrets.REGISTRY_HOST }}"

      - name: Build frontend container image
        run: |
          podman --remote build \
            -f frontend/Dockerfile \
            -t "$FRONTEND_IMAGE:${{ github.sha }}" \
            -t "$FRONTEND_IMAGE:latest" \
            frontend

      - name: Push frontend container image
        run: |
          podman --remote push "$FRONTEND_IMAGE:${{ github.sha }}"
          podman --remote push "$FRONTEND_IMAGE:latest"

  deploy-prod:
    runs-on: [prod]
    #needs: [build-backend, build-frontend]

    env:
      CONTAINER_HOST: unix:///run/user/1001/podman/podman.sock
      XDG_RUNTIME_DIR: /tmp
      RUN_ID: ${{ github.run_id }}
      APP_NAME: ${{ github.repository }}
      REGISTRY_HOST: ${{ secrets.REGISTRY_HOST }}
      IMAGE_TAG: latest
      POSTGRES_DATABASE_NAME: ${{ secrets.PROD_DB_DATABASE_NAME }}
      POSTGRES_USERNAME: ${{ secrets.PROD_DB_USERNAME }}
      POSTGRES_PASSWORD: ${{ secrets.PROD_DB_PASSWORD }}
      POSTGRES_PORT: ${{ secrets.PROD_DB_PORT }}
      PROD_BACKEND_PORT: ${{ secrets.PROD_BACKEND_PORT }}
      PROD_FRONTEND_PORT: ${{ secrets.PROD_FRONTEND_PORT }}
      PROD_BACKEND_HOST: ${{ secrets.PROD_BACKEND_HOST }}

    steps:
    - name: Checkout code
      uses: actions/checkout@v4

    - name: Login to container registry with PAT
      run: |
        echo "${{ secrets.REGISTRY_TOKEN }}" | podman --remote login \
          -u "${{ secrets.REGISTRY_USERNAME }}" \
          --password-stdin \
          "${{ secrets.REGISTRY_HOST }}"

    - name: (Optional) Pre-pull images to speed up play
      run: |
        podman --remote pull "$REGISTRY_HOST/$APP_NAME/sharenet-backend-api-postgres:$IMAGE_TAG"
        podman --remote pull "$REGISTRY_HOST/$APP_NAME/sharenet-frontend:$IMAGE_TAG"

    # 1) Render nginx.conf from repo and copy to host (no unshare)
    - name: Render nginx.conf and write to host
      run: |
        set -euo pipefail
        apk add --no-cache gettext >/dev/null  # envsubst
        # Only substitute the vars we intend to: ${PROD_*_PORT}
        envsubst '${PROD_FRONTEND_PORT} ${PROD_BACKEND_PORT}' < nginx/nginx.conf > /tmp/nginx.conf

        podman --remote run --rm -i \
          --userns=keep-id \
          -v /opt/sharenet/nginx:/host-nginx:rw \
          alpine:3.20 sh -c 'install -D -m 0644 /dev/stdin /host-nginx/nginx.conf' \
          < /tmp/nginx.conf

    # 2) Lint nginx.conf BEFORE restarting the pod (avoids crash loops)
    - name: Validate nginx.conf with throwaway container
      run: |
        set -euo pipefail
        podman --remote run --rm \
          -v /opt/sharenet/nginx:/etc/nginx:ro \
          docker.io/nginx:alpine \
          sh -lc 'nginx -t -c /etc/nginx/nginx.conf'

    # 3) Recreate the pod (down → play). This ensures new images/ports/env + the validated conf.
    - name: Recreate pod
      run: |
        set -euo pipefail
        podman --remote kube down sharenet-production-pod || true
        envsubst < deploy/prod-pod.yml | podman --remote kube play -

    # 4) Verify health on the prod host
    - name: Verify in-pod Nginx
      run: |
        set -euo pipefail
        curl -sS -D- http://127.0.0.1:18080/healthz