#!/usr/bin/env ruby
# frozen_string_literal: true
require 'fileutils'
require 'FelBind'

def print_help
  commands = [
    "  # Prints Help",
    "  help",
    "",
    "  # prints out intermediate",
    "  parse -<backend> <input-file list>",
    "    Valid Backends:",
    "      -uctags (default)",
    "",
    "  # Creates bindings gem",
    "  build -<frontend> <input-file> <destination>",
    "    Valid Frontends:",
    "      -mruby (default)",
  ]

  commands.each { |cmd| puts cmd }
end

if (ARGV.size == 0) || (ARGV[0] == 'help')
  print_help
  return
end

if ARGV[0] == 'parse'
  file_path = ''
  if ARGV[1].start_with? '-'
    if ARGV[1] != '-uctags'
      puts 'invalid backend'
      return
    else
      file_path = ARGV[2]
    end
  else
    file_path = ARGV[1]
  end

  if !File.exist?(file_path)
    puts "invalid file path"
    return
  end

  pp FelBind::Backends::UCTags.parse(file_path)
elsif ARGV[0] == 'build'
  file_path = ''
  dest_dir = ''
  if ARGV[1] == '-mruby'
    file_path = ARGV[2]
    dest_dir = ARGV[3]
  else
    file_path = ARGV[1]
    dest_dir = ARGV[2]
  end

  if !File.exist?(file_path)
    puts "invalid file path"
    return
  end

  puts "TEST"
  FileUtils.mkpath(dest_dir) unless File.exist?(dest_dir)

  #if !File.directory?
  #  puts "invalid destination"
  #  return
  #end

  FelBind::Frontend::Mruby.build(file_path, dest_dir)
else
  print_help
  return
end