name: CI/CD → Deploy via SSH

on:
  push:
    branches:
      - main

env:
  REGISTRY: ${{ vars.REGISTRY }}
  BACKEND_IMAGE: saas-imobiliaria-backend
  FRONTEND_IMAGE: saas-imobiliaria-frontend

jobs:
  # ────────────────────────────────────────────────────────────────────────────
  # 1. BUILD & PUSH IMAGES
  # ────────────────────────────────────────────────────────────────────────────
  build:
    name: Build & Push Docker Images
    runs-on: ubuntu-latest

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

      - name: Set image tag
        id: tag
        run: echo "IMAGE_TAG=${GITHUB_SHA::8}" >> $GITHUB_OUTPUT

      - name: Log in to Forgejo Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ vars.REGISTRY }}
          username: ${{ secrets.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

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

      - name: Build & push backend
        uses: docker/build-push-action@v5
        with:
          context: ./backend
          file: ./backend/Dockerfile.prod
          push: true
          tags: |
            ${{ env.REGISTRY }}/${{ env.BACKEND_IMAGE }}:${{ steps.tag.outputs.IMAGE_TAG }}
            ${{ env.REGISTRY }}/${{ env.BACKEND_IMAGE }}:latest
          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.BACKEND_IMAGE }}:cache
          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.BACKEND_IMAGE }}:cache,mode=max

      - name: Build & push frontend
        uses: docker/build-push-action@v5
        with:
          context: ./frontend
          file: ./frontend/Dockerfile.prod
          push: true
          build-args: |
            VITE_API_URL=https://${{ vars.DOMAIN }}/api
          tags: |
            ${{ env.REGISTRY }}/${{ env.FRONTEND_IMAGE }}:${{ steps.tag.outputs.IMAGE_TAG }}
            ${{ env.REGISTRY }}/${{ env.FRONTEND_IMAGE }}:latest
          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.FRONTEND_IMAGE }}:cache
          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.FRONTEND_IMAGE }}:cache,mode=max

    outputs:
      image_tag: ${{ steps.tag.outputs.IMAGE_TAG }}

  # ────────────────────────────────────────────────────────────────────────────
  # 2. DEPLOY VIA SSH
  # ────────────────────────────────────────────────────────────────────────────
  deploy:
    name: Deploy via SSH
    runs-on: ubuntu-latest
    needs: build

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

      - name: Setup SSH key
        run: |
          mkdir -p ~/.ssh
          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/deploy_key
          chmod 600 ~/.ssh/deploy_key
          ssh-keyscan -p ${{ vars.SSH_PORT || '22' }} ${{ vars.SSH_HOST }} >> ~/.ssh/known_hosts 2>/dev/null

      - name: Copy docker-compose.prod.yml to server
        run: |
          scp -i ~/.ssh/deploy_key \
            -P ${{ vars.SSH_PORT || '22' }} \
            docker-compose.prod.yml \
            ${{ vars.SSH_USER }}@${{ vars.SSH_HOST }}:/opt/saas-imobiliaria/docker-compose.prod.yml

      - name: Deploy on server
        run: |
          ssh -i ~/.ssh/deploy_key \
            -p ${{ vars.SSH_PORT || '22' }} \
            ${{ vars.SSH_USER }}@${{ vars.SSH_HOST }} \
            bash -s << 'ENDSSH'

          set -e

          DEPLOY_DIR="/opt/saas-imobiliaria"
          mkdir -p "$DEPLOY_DIR"
          cd "$DEPLOY_DIR"

          # Write .env for docker compose
          cat > .env << EOF
          IMAGE_TAG=${{ needs.build.outputs.image_tag }}
          REGISTRY=${{ vars.REGISTRY }}
          DOMAIN=${{ vars.DOMAIN }}
          POSTGRES_DB=${{ secrets.POSTGRES_DB }}
          POSTGRES_USER=${{ secrets.POSTGRES_USER }}
          POSTGRES_PASSWORD=${{ secrets.POSTGRES_PASSWORD }}
          SECRET_KEY=${{ secrets.SECRET_KEY }}
          JWT_SECRET_KEY=${{ secrets.JWT_SECRET_KEY }}
          EOF

          # Log in to registry on the server
          echo "${{ secrets.REGISTRY_PASSWORD }}" | \
            docker login ${{ vars.REGISTRY }} \
              -u ${{ secrets.REGISTRY_USER }} \
              --password-stdin

          # Pull new images
          docker compose -f docker-compose.prod.yml pull

          # Rolling restart (zero-downtime: db stays up)
          docker compose -f docker-compose.prod.yml up -d --remove-orphans

          # Clean up old images
          docker image prune -f

          echo "Deploy concluído: ${{ needs.build.outputs.image_tag }}"

          ENDSSH

  # ────────────────────────────────────────────────────────────────────────────
  # 3. HEALTH CHECK — valida HTTPS + endpoints críticos
  # ────────────────────────────────────────────────────────────────────────────
  healthcheck:
    name: Validate HTTPS & Endpoints
    runs-on: ubuntu-latest
    needs: deploy

    steps:
      - name: Wait for containers to stabilize
        run: sleep 30

      - name: Check frontend HTTPS
        run: |
          STATUS=$(curl -s -o /dev/null -w "%{http_code}" \
            --max-time 15 "https://${{ vars.DOMAIN }}")
          echo "Frontend: $STATUS"
          [ "$STATUS" = "200" ] || (echo "❌ Frontend HTTPS falhou ($STATUS)" && exit 1)

      - name: Check HTTP → HTTPS redirect
        run: |
          LOCATION=$(curl -s -o /dev/null -w "%{redirect_url}" \
            --max-time 10 "http://${{ vars.DOMAIN }}")
          echo "Redirect: $LOCATION"
          echo "$LOCATION" | grep -q "https://" || (echo "❌ Redirect HTTP→HTTPS ausente" && exit 1)

      - name: Check backend /health
        run: |
          STATUS=$(curl -s -o /dev/null -w "%{http_code}" \
            --max-time 15 "https://${{ vars.DOMAIN }}/api/health")
          echo "Backend health: $STATUS"
          [ "$STATUS" = "200" ] || (echo "❌ Backend health check falhou ($STATUS)" && exit 1)

      - name: Check TLS certificate validity
        run: |
          EXPIRY=$(echo | openssl s_client \
            -connect ${{ vars.DOMAIN }}:443 \
            -servername ${{ vars.DOMAIN }} 2>/dev/null \
            | openssl x509 -noout -enddate 2>/dev/null | cut -d= -f2)
          echo "Certificado expira: $EXPIRY"
          EXPIRY_EPOCH=$(date -d "$EXPIRY" +%s)
          NOW_EPOCH=$(date +%s)
          DAYS_LEFT=$(( (EXPIRY_EPOCH - NOW_EPOCH) / 86400 ))
          echo "Dias restantes: $DAYS_LEFT"
          [ "$DAYS_LEFT" -gt 7 ] || (echo "❌ Certificado expira em $DAYS_LEFT dias!" && exit 1)

      - name: Check API properties endpoint
        run: |
          STATUS=$(curl -s -o /dev/null -w "%{http_code}" \
            --max-time 15 "https://${{ vars.DOMAIN }}/api/properties?limit=1")
          echo "Properties API: $STATUS"
          [ "$STATUS" = "200" ] || (echo "❌ Properties API falhou ($STATUS)" && exit 1)

      - name: All checks passed
        run: |
          echo "✅ Deploy validado com sucesso!"
          echo "   → https://${{ vars.DOMAIN }} está no ar"