let
  pkgs = import <nixpkgs> {};

  # Build script for a specific machine
  buildForMachine = name: pkgs.writeShellScriptBin "build-${name}" ''
    set -e

    BUILD_DIR="./build/${name}"

    echo "Building web-app for ${name}..."

    # Clean and create build directory
    rm -rf "$BUILD_DIR"
    mkdir -p "$BUILD_DIR"

    # Copy web-app source
    cp -r ./web-app/* "$BUILD_DIR/"

    # Copy machine-specific .env
    echo "Copying machine-specific .env..."
    cp ./machine-specific/${name}/env/.env "$BUILD_DIR/.env"

    # Copy machine-specific images to public folder
    echo "Copying machine-specific images to public..."
    cp -r ./machine-specific/${name}/images/* "$BUILD_DIR/public/"

    # Copy machine-specific logo to assets
    echo "Copying machine-specific logo to assets..."
    mkdir -p "$BUILD_DIR/src/assets"
    cp ./machine-specific/${name}/images/logo.png "$BUILD_DIR/src/assets/logo.png"

    # Build the web-app
    echo "Running build..."
    cd "$BUILD_DIR"
    ${pkgs.nodejs}/bin/npm run build

    echo "Build complete for ${name}! Output in $BUILD_DIR/dist"
  '';

in {
  # Example machine build (copy this line for each machine)
  # Replace "example-machine" with your machine name
  example-machine = buildForMachine "example-machine";

  # Add more machines here:
  # machine1 = buildForMachine "machine1";
  # machine2 = buildForMachine "machine2";

  # Build all machines (update this list with your machines)
  all = pkgs.writeShellScriptBin "build-all" ''
    set -e
    echo "Building for all machines..."
    ${(buildForMachine "example-machine")}/bin/build-example-machine
    # Add your machines here:
    # ${(buildForMachine "machine1")}/bin/build-machine1
    # ${(buildForMachine "machine2")}/bin/build-machine2
    echo "All builds complete!"
  '';
}