name: Deploy to Home Assistant

on:
  push:
    branches:
      - main
    paths:
      - 'config/**'

jobs:
  deploy:
    name: Deploy Configuration
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'
      
      - name: Install CIFS utilities
        run: |
          sudo apt-get update
          sudo apt-get install -y cifs-utils
      
      - name: Mount HA config via SMB
        env:
          SMB_HOST: ${{ secrets.SMB_HOST }}
          SMB_SHARE: ${{ secrets.SMB_SHARE }}
          SMB_USER: ${{ secrets.SMB_USER }}
          SMB_PASSWORD: ${{ secrets.SMB_PASSWORD }}
        run: |
          sudo mkdir -p /mnt/ha-config
          sudo mkdir -p /mnt/ha-config-backup
          sudo mount -t cifs "//${SMB_HOST}/${SMB_SHARE}" /mnt/ha-config \
            -o username=${SMB_USER},password=${SMB_PASSWORD},uid=$(id -u),gid=$(id -g)
          echo "✓ HA config mounted at /mnt/ha-config"
      
      - name: Generate secrets.yaml
        env:
          DB_USER: ${{ secrets.DB_USER }}
          DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
          POSTGRES_HOST: ${{ secrets.POSTGRES_HOST }}
          POSTGRES_PORT: ${{ secrets.POSTGRES_PORT }}
          DB_NAME: ${{ secrets.DB_NAME }}
        run: |
          python3 << 'EOF'
          import os
          from urllib.parse import quote_plus
          
          # URL-encode password for PostgreSQL connection string
          db_user = os.environ['DB_USER']
          db_password = quote_plus(os.environ['DB_PASSWORD'])
          db_host = os.environ['POSTGRES_HOST']
          db_port = os.environ['POSTGRES_PORT']
          db_name = os.environ['DB_NAME']
          
          # Generate secrets.yaml
          secrets_content = f"""# Auto-generated secrets.yaml
          recorder_db: "postgresql://{db_user}:{db_password}@{db_host}:{db_port}/{db_name}"
          """
          
          with open('config/secrets.yaml', 'w') as f:
              f.write(secrets_content)
          
          print("✓ Generated secrets.yaml")
          EOF
      
      - name: Replace notification service placeholder
        env:
          HA_NOTIFY_SERVICE: ${{ secrets.HA_NOTIFY_SERVICE }}
        run: |
          # Replace {{HA_NOTIFY_SERVICE}} placeholder in automations.yaml
          sed -i "s/{{HA_NOTIFY_SERVICE}}/$HA_NOTIFY_SERVICE/g" config/automations.yaml
          echo "✓ Replaced notification service placeholder"
      
      - name: Pre-deployment validation
        run: |
          docker run --rm \
            -v $(pwd)/config:/config \
            homeassistant/home-assistant:latest \
            python -m homeassistant --script check_config -c /config
      
      - name: Backup current config
        run: |
          echo "Creating backup of current configuration..."
          rsync -a --delete /mnt/ha-config/ /mnt/ha-config-backup/
          echo "✓ Backup created at /mnt/ha-config-backup"
      
      - name: Deploy config files
        run: |
          echo "Deploying configuration files..."
          rsync -av --checksum --delete \
            --exclude='.git*' \
            --exclude='secrets.yaml' \
            --exclude='home-assistant.log*' \
            --exclude='*.db' \
            --exclude='*.db-*' \
            config/ /mnt/ha-config/
          echo "✓ Configuration files deployed"
      
      - name: Deploy secrets.yaml
        run: |
          echo "Deploying secrets.yaml..."
          rsync -av --checksum \
            config/secrets.yaml /mnt/ha-config/secrets.yaml
          echo "✓ Secrets file deployed"
      
      - name: Reload Home Assistant configuration
        env:
          HA_HOST: ${{ secrets.HA_HOST }}
          HA_TOKEN: ${{ secrets.HA_TOKEN }}
        run: |
          echo "Reloading Home Assistant configuration..."
          curl -X POST \
            -H "Authorization: Bearer ${HA_TOKEN}" \
            -H "Content-Type: application/json" \
            http://${HA_HOST}:8123/api/services/homeassistant/reload_all
          echo "✓ Reload triggered"
      
      - name: Health check with retry
        env:
          HA_HOST: ${{ secrets.HA_HOST }}
          HA_TOKEN: ${{ secrets.HA_TOKEN }}
        run: |
          echo "Waiting for Home Assistant to become ready..."
          
          MAX_ATTEMPTS=12  # 60 seconds total (12 * 5 seconds)
          ATTEMPT=1
          
          while [ $ATTEMPT -le $MAX_ATTEMPTS ]; do
            echo "Health check attempt $ATTEMPT/$MAX_ATTEMPTS..."
            
            if curl -f -s \
              -H "Authorization: Bearer ${HA_TOKEN}" \
              http://${HA_HOST}:8123/api/ > /dev/null 2>&1; then
              echo "✓ Home Assistant is healthy!"
              exit 0
            fi
            
            if [ $ATTEMPT -lt $MAX_ATTEMPTS ]; then
              echo "  Not ready yet, waiting 5 seconds..."
              sleep 5
            fi
            
            ATTEMPT=$((ATTEMPT + 1))
          done
          
          echo "✗ Health check failed after ${MAX_ATTEMPTS} attempts"
          exit 1
      
      - name: Cleanup backup on success
        if: success()
        run: |
          echo "Cleaning up backup..."
          rm -rf /mnt/ha-config-backup
          echo "✓ Backup removed"
      
      - name: Unmount SMB share
        if: always()
        run: |
          sudo umount /mnt/ha-config 2>/dev/null || true
          echo "✓ SMB share unmounted"
      
      - name: Send success notification
        if: success()
        env:
          HA_HOST: ${{ secrets.HA_HOST }}
        run: |
          echo "Sending success notification..."
          curl -X POST \
            http://${HA_HOST}:8123/api/webhook/gitea_deploy
          echo "✓ Success notification sent"
      
      - name: Rollback on failure
        if: failure()
        env:
          HA_HOST: ${{ secrets.HA_HOST }}
          HA_TOKEN: ${{ secrets.HA_TOKEN }}
        run: |
          echo "⚠ Deployment failed, rolling back..."
          
          # Restore backup
          rsync -a --delete /mnt/ha-config-backup/ /mnt/ha-config/
          echo "✓ Configuration restored from backup"
          
          # Reload with old config
          curl -X POST \
            -H "Authorization: Bearer ${HA_TOKEN}" \
            -H "Content-Type: application/json" \
            http://${HA_HOST}:8123/api/services/homeassistant/reload_all
          echo "✓ Home Assistant reloaded with previous configuration"
          
          # Send rollback notification
          curl -X POST \
            http://${HA_HOST}:8123/api/webhook/gitea_rollback
          echo "✓ Rollback notification sent"
          
          # Cleanup backup
          rm -rf /mnt/ha-config-backup
          echo "✓ Backup cleaned up"