#!/usr/bin/env ruby

require 'optparse'
require 'os'

require_relative '../lib/gemwarrior/game'
require_relative '../lib/gemwarrior/game_options'
require_relative '../lib/gemwarrior/version'

include Gemwarrior

GAME_NAME             = 'Gem Warrior'
GW_HOME               = "#{Dir.home}/.gemwarrior"
GW_SAVE_FILE_YAML     = "#{GW_HOME}/gw_sav.yaml"
GW_SAVE_FILE_BIN      = "#{GW_HOME}/gw_sav.dat"
GW_OPTS_FILE          = "#{GW_HOME}/gw_opts"
GW_LOG_FILE           = "#{GW_HOME}/gw_log"
GW_DEFAULT_WORLD_YAML = File.expand_path('../../data/default_world.yaml', __FILE__)
GW_DEFAULT_WORLD_BIN  = File.expand_path('../../data/default_world.bin', __FILE__)

def parse_options_cli
  options = {
    beast_mode:     false, 
    debug_mode:     false, 
    god_mode:       false, 
    new_skip:       false,
    resume_skip:    false,
    sound_enabled:  false,
    sound_system:   nil,
    sound_volume:   0.3,
    use_wordnik:    false, 
    extra_command:  nil
  }

  options_file = read_options_file
  
  unless options_file.nil?
    sound_enabled_option    = options_file[0][1].eql?('false') ? false : true
    sound_system_selected   = options_file[1][1]
    sound_volume_option     = options_file[2][1].to_f
    use_wordnik_option      = options_file[3][1].eql?('false') ? false : true

    options[:sound_enabled] = sound_enabled_option
    options[:sound_system]  = sound_system_selected
    options[:sound_volume]  = sound_volume_option
    options[:use_wordnik]   = use_wordnik_option
  end

  optparse = OptionParser.new do |opts|
    opts.on('-b', '--beast', 'Enable debug[beastmode]') do
      options[:beast_mode] = true
    end

    opts.on('-d', '--debug', 'Enable debug commands in-game') do
      options[:debug_mode] = true
    end

    opts.on('-g', '--god', 'Enable debug[godmode]') do
      options[:god_mode] = true
    end

    opts.on('-n', '--new', 'Immediately start a new game, skipping main menu') do
      options[:new_skip] = true
    end

    opts.on('-r', '--resume', 'Immediately resume the saved game, skipping main menu') do
      options[:resume_skip] = true
    end

    opts.on('-s', '--sound', 'Enable sound (experimental)') do
      options[:sound_enabled] = true
    end

    opts.on('-v', '--version', 'Display version number and exit') do
      puts "#{GAME_NAME} v#{Gemwarrior::VERSION}"
      exit
    end

    opts.on('-w', '--wordnik', 'Enable Wordnik to generate more diverse, dynamic descriptors of entities') do
      options[:use_wordnik] = true
    end

    opts.on('-x', '--extra COMMAND', 'Run a command immediately upon beginning the game') do |xc|
      options[:extra_command] = xc.to_s
    end
  end

  optparse.parse!()

  return options
end

def print_error(error)
  case error
  when OptionParser::InvalidOption
    puts "#{GAME_NAME}: illegal option #{error.args.join(' ')}"
  else
    puts "An unexpected error occurred while running #{GAME_NAME}:"
    puts "  #{error}\n"
  end
end

def read_options_file
  if File.exist?(GameOptions.data['options_file_path'])
    options = []
    File.open(GameOptions.data['options_file_path']).readlines.each do |line|
      options << line.chomp.split(':')
    end
    return options
  end
  nil
end

def init_config
  Dir.mkdir(GW_HOME) unless Dir.exist?(GW_HOME)

  sound_system_default = OS.windows? ? 'win32-sound' : 'feep'
  
  GameOptions.add 'sound_system',             sound_system_default
  GameOptions.add 'save_file_mode',           'Y'
  GameOptions.add 'default_world_path_yaml',  GW_DEFAULT_WORLD_YAML
  GameOptions.add 'default_world_path_bin',   GW_DEFAULT_WORLD_BIN
  GameOptions.add 'save_file_yaml_path',      GW_SAVE_FILE_YAML
  GameOptions.add 'save_file_bin_path',       GW_SAVE_FILE_BIN
  GameOptions.add 'log_file_path',            GW_LOG_FILE
  GameOptions.add 'options_file_path',        GW_OPTS_FILE
end

begin
  init_config

  options = parse_options_cli

  Gemwarrior::Game.new(options)
rescue => error
  print_error(error)
  exit(false)
end