name: Build on Push

on:
  push:
    branches:
      - main
  workflow_dispatch: # Allow manual trigger

jobs:
  build-configurations:
    runs-on: nixos
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Configure Attic cache
        run: |
          # Configure attic client to use your cache server
          attic login servidos http://127.0.0.1:2343 ${{ secrets.ATTIC_TOKEN }}

      - name: Build workstation configuration
        run: |
          echo "Building workstation configuration..."
          nix build .#nixosConfigurations.workstation.config.system.build.toplevel --quiet

      - name: Build server configuration
        run: |
          echo "Building server configuration..."
          nix build .#nixosConfigurations.server.config.system.build.toplevel --quiet

      - name: Build emacs-vm configuration
        run: |
          echo "Building emacs-vm configuration..."
          nix build .#emacs-vm --quiet

      - name: Push to cache
        continue-on-error: true
        run: |
          echo "Pushing builds to cache..."
          
          # Retry function for attic push commands
          retry_attic_push() {
            local max_attempts=5
            local attempt=1
            local command="$@"
            
            while [ $attempt -le $max_attempts ]; do
              echo "Attempt $attempt/$max_attempts: $command"
              if eval "$command"; then
                echo "✓ Successfully pushed to cache on attempt $attempt"
                return 0
              else
                local exit_code=$?
                echo "✗ Attempt $attempt failed with exit code $exit_code"
                if [ $attempt -lt $max_attempts ]; then
                  echo "Waiting 2 seconds before retry..."
                  sleep 2
                fi
                attempt=$((attempt + 1))
              fi
            done
            
            echo "⚠️ Failed to push to cache after $max_attempts attempts. Continuing anyway..."
            return 0  # Don't fail the pipeline
          }
          
          # Push all built derivations to cache
          if ls result* 1> /dev/null 2>&1; then
            retry_attic_push "attic push servidos:nixos result*"
          fi

          # Push the specific system derivations we just built
          # Get paths and push with retry (paths are already built, so this is fast)
          workstation_path=$(nix build .#nixosConfigurations.workstation.config.system.build.toplevel --print-out-paths 2>/dev/null || echo "")
          if [ -n "$workstation_path" ]; then
            retry_attic_push "echo \"$workstation_path\" | attic push servidos:nixos --stdin"
          fi
          
          server_path=$(nix build .#nixosConfigurations.server.config.system.build.toplevel --print-out-paths 2>/dev/null || echo "")
          if [ -n "$server_path" ]; then
            retry_attic_push "echo \"$server_path\" | attic push servidos:nixos --stdin"
          fi
          
          emacs_path=$(nix build .#emacs-vm --print-out-paths 2>/dev/null || echo "")
          if [ -n "$emacs_path" ]; then
            retry_attic_push "echo \"$emacs_path\" | attic push servidos:nixos --stdin"
          fi

      - name: Summary
        run: |
          echo "✅ Build on push completed successfully!"
          echo "- Built workstation, server, and emacs-vm configurations"
          echo "- Pushed all builds to Atticd cache"