class Opal::CLIOptions

def initialize
  super
  @options = {}
  self.banner = 'Usage: opal [options] -- [programfile]'
  separator ''
  on('--repl', 'Run the Opal REPL') do
    options[:repl] = true
  end
  on('-v', '--verbose', 'print version number, then turn on verbose mode') do
    print_version
    exit if ARGV.empty?
    options[:verbose] = true
  end
  on('--verbose', 'turn on verbose mode (set $VERBOSE to true)') do
    options[:verbose] = true
  end
  on('-d', '--debug', 'turn on debug mode (set $DEBUG to true)') do
    options[:debug] = true
  end
  on('--version', 'Print the version') do
    print_version
    exit
  end
  on('-h', '--help', 'Show this message') do
    puts self
    exit
  end
  section 'Basic Options:'
  on('-e', '--eval SOURCE', String,
    'One line of script. Several -e\'s allowed. Omit [programfile]'
  ) do |source|
    options[:evals] ||= []
    options[:evals] << source
  end
  on('-r', '--require LIBRARY', String,
    'Require the library before executing your script'
  ) do |library|
    options[:requires] ||= []
    options[:requires] << library
  end
  on('-q', '--rbrequire LIBRARY', String,
    'Require the library in Ruby context before compiling'
  ) do |library|
    options[:rbrequires] ||= []
    options[:rbrequires] << library
  end
  on('-I', '--include DIR', 'Append a load path (may be used more than once)') do |i|
    options[:load_paths] ||= []
    options[:load_paths] << i
  end
  on('-s', '--stub FILE', String, 'Stubbed files will be compiled as empty files') do |stub|
    options[:stubs] ||= []
    options[:stubs] << stub
  end
  on('-p', '--preload FILE', String, 'Preloaded files will be prepared for dynamic requires') do |stub|
    options[:preload] ||= []
    options[:preload] << stub
  end
  on('-g', '--gem GEM_NAME', String, 'Adds the specified GEM_NAME to Opal\'s load path.') do |g|
    options[:gems] ||= []
    options[:gems] << g
  end
  section 'Running Options:'
  on('-R', '--runner RUNNER', Opal::CliRunners.to_h.keys, 'Choose the runner:', "nodejs (default), #{(Opal::CliRunners.to_h.keys - %i[nodejs compiler]).join(', ')}") do |runner|
    options[:runner] = runner.to_sym
  end
  on('--server-port PORT', 'Set the port for the server runner (default port: 3000)') do |port|
    options[:runner_options] ||= {}
    options[:runner_options][:port] = port.to_i
  end
  on('--runner-options JSON', 'Set options specific to the selected runner as a JSON string (e.g. port for server)') do |json_options|
    require 'json'
    runner_options = JSON.parse(json_options, symbolize_names: true)
    options[:runner_options] ||= {}
    options[:runner_options].merge!(runner_options)
  end
  section 'Builder Options:'
  on('-c', '--compile', 'Compile to JavaScript') do
    options[:runner] = :compiler
  end
  on('-o', '--output FILE', 'Output JavaScript to FILE') do |file|
    options[:output] = File.open(file, 'w')
  end
  on('-P', '--map FILE', 'Output source map to FILE') do |file|
    options[:runner_options] ||= {}
    options[:runner_options][:map_file] = file
  end
  on('--no-source-map', "Don't append source map to a compiled file") do
    options[:runner_options] ||= {}
    options[:runner_options][:no_source_map] = true
  end
  on('--watch', 'Run the compiler in foreground, recompiling every filesystem change') do
    options[:runner_options] ||= {}
    options[:runner_options][:watch] = true
  end
  on('--no-cache', 'Disable filesystem cache') do
    options[:no_cache] = true
  end
  on('-L', '--library', 'Compile only required libraries. Omit [programfile] and [-e]. Assumed [-cOE].') do
    options[:lib_only] = true
    options[:no_exit] = true
    options[:compile] = true
    options[:skip_opal_require] = true
  end
  on('-O', '--no-opal', 'Disable implicit `require "opal"`') do
    options[:skip_opal_require] = true
  end
  on('-E', '--no-exit', 'Do not append a Kernel#exit at the end of file') do
    options[:no_exit] = true
  end
  section 'Compiler Options:'
  on('--use-strict', 'Enables JavaScript\'s strict mode (i.e., adds \'use strict\'; statement)') do
    options[:use_strict] = true
  end
  on('--esm', 'Wraps compiled bundle as for ES6 module') do
    options[:esm] = true
  end
  on('-A', '--arity-check', 'Enable arity check') do
    options[:arity_check] = true
  end
  dynamic_require_levels = %w[error warning ignore]
  on('-D', '--dynamic-require LEVEL', dynamic_require_levels,
    'Set level of dynamic require severity.',
    "(default: error, values: #{dynamic_require_levels.join(', ')})"
  ) do |level|
    options[:dynamic_require_severity] = level.to_sym
  end
  missing_require_levels = %w[error warning ignore]
  on('--missing-require LEVEL', missing_require_levels,
    'Set level of missing require severity.',
    "(default: error, values: #{missing_require_levels.join(', ')})"
  ) do |level|
    options[:missing_require_severity] = level.to_sym
  end
  on('--enable-source-location', 'Compiles source location for each method definition.') do
    options[:enable_source_location] = true
  end
  on('--parse-comments', 'Compiles comments for each method definition.') do
    options[:parse_comments] = true
  end
  on('--enable-file-source-embed', 'Embeds file sources to be accessed by applications.') do
    options[:enable_file_source_embed] = true
  end
  on('--irb', 'Enable IRB var mode') do
    options[:irb] = true
  end
  on('-M', '--no-method-missing', 'Disable method missing') do
    options[:method_missing] = false
  end
  on('-F', '--file FILE', 'Set filename for compiled code') do |file|
    options[:file] = file
  end
  on('-V', '(deprecated; always enabled) Enable inline Operators') do
    warn '* -V is deprecated and has no effect'
    options[:inline_operators] = true
  end
  section 'Debug Options:'
  on('--sexp', 'Show Sexps') do
    options[:sexp] = true
  end
  on('--debug-source-map', 'Debug source map') do
    options[:debug_source_map] = true
  end
  separator ''
end

def print_version
  require 'opal/version'
  puts "Opal v#{Opal::VERSION}"
end

def section(title)
  separator ''
  separator title
  separator ''
end