swiftui_2_lvn

defmodule Swiftui2Lvn.CLI do
  @moduledoc """
  Simple CLI for SwiftUI to LiveViewNative transformer.
  Reads SwiftUI code from stdin, file path, or command line args and outputs LVN code to stdout.

  ## Usage

      # From stdin
      echo "VStack { Text('Hello') }" | swiftui2lvn

      # From file
      swiftui2lvn --file path/to/swiftui_code.swift
      swiftui2lvn -f path/to/swiftui_code.swift

      # From command line args
      swiftui2lvn "VStack { Text('Hello') }"
  """

  def main(args) do
    try do
      input = get_input(args)

      # Use the library's public API to convert SwiftUI to LVN
      output = Swiftui2Lvn.convert(input)

      # Write to stdout
      IO.write(output)
    rescue
      error ->
        IO.puts(:stderr, "Error: #{inspect(error)}")
        System.halt(1)
    end
  end

  defp get_input([]), do: IO.read(:all) |> String.trim()

  defp get_input(["--file", file_path | _rest]) do
    read_file(file_path)
  end

  defp get_input(["-f", file_path | _rest]) do
    read_file(file_path)
  end

  defp get_input(args) do
    # Args provided, join them as the input
    Enum.join(args, " ")
  end

  defp read_file(file_path) do
    case File.read(file_path) do
      {:ok, content} -> String.trim(content)
      {:error, reason} ->
        raise "Failed to read file '#{file_path}': #{:file.format_error(reason)}"
    end
  end
end