class Github::API

def self.inherited(klass)
  klass.class_eval <<-RUBY_EVAL, __FILE__, __LINE__ + 1
    def self.actions
      self.new.api_methods_in(#{klass})
    end
    def actions
      api_methods_in(#{klass})
    end
  RUBY_EVAL
  super
end

def _create_instance(klass, options)
  options.symbolize_keys!
  instance = klass.send :new, options
  Github.api_client = instance
  instance
end

def _extract_parameters(array)
  if array.last.is_a?(Hash) && array.last.instance_of?(Hash)
    pop
  else
    {}
  end
end

def _filter_params_keys(keys, params)  # :nodoc:
  case params
  when Hash
    params.keys.each do |k, v|
      unless (keys.include?(k) or VALID_API_KEYS.include?(k))
        params.delete(k)
      else
        _filter_params_keys(keys, params[k])
      end
    end
  when Array
    params.map! do |el|
      _filter_params_keys(keys, el)
    end
  else
    params
  end
  return params
end

def _hash_traverse(hash, &block)
  hash.each do |key, val|
    block.call(key)
    case val
    when Hash
      val.keys.each do |k|
        _hash_traverse(val, &block)
      end
    when Array
      val.each do |item|
        _hash_traverse(item, &block)
      end
    end
  end
  return hash
end

def _merge_mime_type(resource, params) # :nodoc:
    params['resource'] = resource
    params['mime_type'] = params['mime_type'] || :raw
end

def _merge_user_into_params!(params)  #  :nodoc:
  params.merge!({ 'user' => self.user }) if user?
end

def _merge_user_repo_into_params!(params)   #  :nodoc:
  { 'user' => self.user, 'repo' => self.repo }.merge!(params)
end

def _normalize_params_keys(params)  #  :nodoc:
  case params
  when Hash
    params.keys.each do |k|
      params[k.to_s] = params.delete(k)
      _normalize_params_keys(params[k.to_s])
    end
  when Array
    params.map! do |el|
      _normalize_params_keys(el)
    end
  else
    params.to_s
  end
  return params
end

def _process_basic_auth(auth)
  case auth
  when String
    self.login    = auth.split(':').first
    self.password = auth.split(':').last
  when Hash
    self.login    = auth[:login]
    self.password = auth[:password]
  end
end

def _set_api_client
  Github.api_client = self
end

def _token_required
end

def _update_user_repo_params(user_name, repo_name=nil) # :nodoc:
  self.user = user_name || self.user
  self.repo = repo_name || self.repo
end

def _validate_inputs(required, provided) # :nodoc:
  required.all? do |key|
    provided.has_deep_key? key
  end
end

def _validate_params_values(options, params)  # :nodoc:
  params.each do |k, v|
    next unless options.keys.include?(k)
    if options[k].is_a?(Array) && !options[k].include?(params[k])
      raise ArgumentError, "Wrong value for #{k}, allowed: #{options[k].join(', ')}"
    elsif options[k].is_a?(Regexp) && !(options[k] =~ params[k])
      raise ArgumentError, "String does not match the parameter value."
    end
  end
end

def _validate_presence_of(*params) # :nodoc:
  params.each do |param|
    raise ArgumentError, "parameter cannot be nil" if param.nil?
  end
end

def _validate_user_repo_params(user_name, repo_name) # :nodoc:
  raise ArgumentError, "[user] parameter cannot be nil" if user_name.nil?
  raise ArgumentError, "[repo] parameter cannot be nil" if repo_name.nil?
end

def api_methods_in(klass)
  puts "---"
  (klass.send(:instance_methods, false) - ['actions']).sort.each do |rest_met|
    puts "|--> #{rest_met}"
  end
  klass.included_modules.each do |mod|
    if mod.to_s =~ /#{klass}/
      puts "| \\ #{mod.to_s}"
      mod.instance_methods(false).each do |met|
        puts "|  |--> #{met}"
      end
      puts "| /"
    end
  end
  puts "---"
  nil
end

def initialize(options = {}, &block)
  options = Github.options.merge(options)
  Configuration::VALID_OPTIONS_KEYS.each do |key|
    send("#{key}=", options[key])
  end
  _process_basic_auth(options[:basic_auth])
  _set_api_client
  client if client_id? && client_secret?
  self.instance_eval(&block) if block_given?
end

def method_missing(method, *args, &block) # :nodoc:
  case method.to_s
  when /^(.*)\?$/
    return !self.send($1.to_s).nil?
  when /^clear_(.*)$/
    self.send("#{$1.to_s}=", nil)
  else
    super
  end
end