name: Deploy to Raspberry Pi

on:
  workflow_run:
    workflows: ["Tests"]
    types:
      - completed
  workflow_dispatch:

jobs:
  deploy:
    name: Deploy to Raspberry Pis
    runs-on: self-hosted
    # Only run if tests passed (for workflow_run) or if manually triggered
    if: ${{ github.event_name == 'workflow_dispatch' || github.event.workflow_run.conclusion == 'success' }}

    steps:
    - name: Validate required secrets
      run: |
        if [ -z "${{ secrets.PI_HOSTS }}" ]; then
          echo "Error: PI_HOSTS secret is not set"
          echo "Please set PI_HOSTS secret with comma-separated hostnames (e.g., 'pi1.local,pi2.local')"
          exit 1
        fi
        if [ -z "${{ secrets.PI_REPO_PATH }}" ]; then
          echo "Error: PI_REPO_PATH secret is not set"
          echo "Please set PI_REPO_PATH secret with repository path (e.g., '/home/pi/ble-reticulum')"
          exit 1
        fi
        if [ -z "${{ secrets.PI_USER }}" ]; then
          echo "Error: PI_USER secret is not set"
          echo "Please set PI_USER secret with SSH username (e.g., 'pi')"
          exit 1
        fi
        if [ -z "${{ secrets.PI_SSH_KEY }}" ]; then
          echo "Error: PI_SSH_KEY secret is not set"
          echo "Please set PI_SSH_KEY secret with SSH private key for Pi access"
          exit 1
        fi
        echo "All required secrets are configured"

    - name: Setup SSH key
      env:
        PI_SSH_KEY: ${{ secrets.PI_SSH_KEY }}
      run: |
        # Create .ssh directory if it doesn't exist
        mkdir -p ~/.ssh
        chmod 700 ~/.ssh

        # Write SSH private key to file
        echo "$PI_SSH_KEY" > ~/.ssh/id_ed25519
        chmod 600 ~/.ssh/id_ed25519

        # Disable strict host key checking for known local hosts
        cat >> ~/.ssh/config <<EOF
        Host *.local 192.168.*
            StrictHostKeyChecking no
            UserKnownHostsFile /dev/null
            LogLevel ERROR
        EOF
        chmod 600 ~/.ssh/config

        echo "SSH key configured successfully"

    - name: Deploy to Raspberry Pis
      env:
        PI_HOSTS: ${{ secrets.PI_HOSTS }}
        PI_REPO_PATH: ${{ secrets.PI_REPO_PATH }}
        PI_USER: ${{ secrets.PI_USER }}
        BRANCH_NAME: ${{ github.event.workflow_run.head_branch || github.ref_name }}
      run: |
        # Split comma-separated PI_HOSTS into array
        IFS=',' read -ra HOSTS <<< "$PI_HOSTS"

        echo "==================================="
        echo "Deployment Configuration"
        echo "==================================="
        echo "Branch: $BRANCH_NAME"
        echo "Target Pis: ${#HOSTS[@]}"
        echo "Repository Path: $PI_REPO_PATH"
        echo "User: $PI_USER"
        echo "==================================="
        echo ""

        # Track deployment status
        FAILED_HOSTS=()
        SUCCESSFUL_HOSTS=()

        # Deploy to each Pi
        for HOST in "${HOSTS[@]}"; do
          # Trim whitespace
          HOST=$(echo "$HOST" | xargs)

          echo ">>> Deploying to $HOST..."

          # Create deployment script
          DEPLOY_SCRIPT="set -e
          echo '  [1/7] Navigating to repository...'
          cd '$PI_REPO_PATH' || exit 1

          echo '  [2/7] Fetching latest changes...'
          git fetch --all || exit 1

          echo '  [3/7] Checking out branch: $BRANCH_NAME...'
          git checkout '$BRANCH_NAME' || exit 1

          echo '  [4/7] Pulling latest code...'
          git pull || exit 1

          echo '  [5/7] Creating ~/.reticulum/interfaces directory...'
          mkdir -p ~/.reticulum/interfaces || exit 1

          echo '  [6/7] Copying interface files...'
          cp -v src/RNS/Interfaces/*.py ~/.reticulum/interfaces/ || exit 1

          echo '  [7/7] Restarting rnsd...'
          RNSD_BIN=\"\$HOME/.local/bin/rnsd\"
          if systemctl is-active --quiet rnsd 2>/dev/null; then
            sudo systemctl restart rnsd || exit 1
            echo '  ✓ rnsd restarted via systemd'
          else
            pkill -9 rnsd 2>/dev/null || true
            sleep 1
            nohup \"\$RNSD_BIN\" > /dev/null 2>&1 &
            sleep 2
            if pgrep -x rnsd > /dev/null; then
              echo '  ✓ rnsd started successfully'
            else
              echo '  ✗ Failed to start rnsd'
              exit 1
            fi
          fi

          echo '  ✓ Deployment successful!'"

          # Deploy with error handling
          if echo "$DEPLOY_SCRIPT" | ssh -o StrictHostKeyChecking=no -o ConnectTimeout=10 "$PI_USER@$HOST" bash; then
            echo "✓ Successfully deployed to $HOST"
            SUCCESSFUL_HOSTS+=("$HOST")
          else
            echo "✗ Failed to deploy to $HOST"
            FAILED_HOSTS+=("$HOST")
          fi

          echo ""
        done

        # Print summary
        echo "==================================="
        echo "Deployment Summary"
        echo "==================================="
        echo "Successful: ${#SUCCESSFUL_HOSTS[@]}/${#HOSTS[@]}"
        if [ ${#SUCCESSFUL_HOSTS[@]} -gt 0 ]; then
          printf '  ✓ %s\n' "${SUCCESSFUL_HOSTS[@]}"
        fi

        if [ ${#FAILED_HOSTS[@]} -gt 0 ]; then
          echo ""
          echo "Failed: ${#FAILED_HOSTS[@]}/${#HOSTS[@]}"
          printf '  ✗ %s\n' "${FAILED_HOSTS[@]}"
          echo ""
          echo "==================================="
          exit 1
        fi

        echo "==================================="

    - name: Cleanup SSH key
      if: always()
      run: |
        # Remove SSH key for security
        rm -f ~/.ssh/id_ed25519
        echo "SSH key cleaned up"

    - name: Deployment status
      if: always()
      run: |
        echo "## Deployment Results" >> $GITHUB_STEP_SUMMARY
        echo "- **Branch:** ${{ github.event.workflow_run.head_branch }}" >> $GITHUB_STEP_SUMMARY
        echo "- **Commit:** ${{ github.event.workflow_run.head_sha }}" >> $GITHUB_STEP_SUMMARY
        echo "- **Triggered by:** ${{ github.event.workflow_run.actor.login }}" >> $GITHUB_STEP_SUMMARY
        echo "" >> $GITHUB_STEP_SUMMARY
        if [ "${{ job.status }}" == "success" ]; then
          echo "✓ All Raspberry Pis deployed successfully" >> $GITHUB_STEP_SUMMARY
        else
          echo "✗ Deployment failed on one or more Raspberry Pis" >> $GITHUB_STEP_SUMMARY
          echo "Check the job logs for details" >> $GITHUB_STEP_SUMMARY
        fi