class Chef::Resource::Locale

def define_resource_requirements
  requirements.assert(:all_actions) do |a|
    a.assertion { LOCALE_PLATFORM_FAMILIES.include?(node[:platform_family]) }
    a.failure_message(Chef::Exceptions::ProviderNotFound, "The locale resource is not supported on platform family: #{node[:platform_family]}")
  end
  requirements.assert(:all_actions) do |a|
    a.assertion do
      # RHEL/CentOS type platforms don't have locale-gen
      # Windows has locale-gen as part of the install, but not in the path
      which("locale-gen") || windows?
    end
    a.failure_message(Chef::Exceptions::ProviderNotFound, "The locale resource requires the locale-gen tool")
  end
end

def generate_locales
  shell_out!("locale-gen #{unavailable_locales.join(" ")}", timeout: 1800)
end

def get_system_locale_windows
  powershell_exec("Get-WinSystemLocale").result["Name"]
end

def lc_all(arg = nil)
  unless arg.nil?
    Chef.deprecated(:locale_lc_all, "Changing LC_ALL can break #{ChefUtils::Dist::Infra::PRODUCT}'s parsing of command output in unexpected ways.\n Use one of the more specific LC_ properties as needed.")
  end
end

def new_content
  @new_content ||= begin
    content = {}
    content = new_resource.lc_env.dup if new_resource.lc_env
    content["LANG"] = new_resource.lang if new_resource.lang
    content.sort.map { |t| t.join("=") }.join("\n") + "\n"
  end
end

def set_system_locale
  if windows?
    # Sets the system locale for the current computer.
    # @see https://docs.microsoft.com/en-us/powershell/module/internationalcmdlets/set-winsystemlocale
    #
    response = powershell_exec("Set-WinSystemLocale -SystemLocale #{new_resource.lang}")
    raise response.errors.join(" ") if response.error?
  else
    generate_locales unless unavailable_locales.empty?
    update_locale
  end
end

def unavailable_locales
  @unavailable_locales ||= begin
    available = shell_out!("locale -a").stdout.split("\n")
    required = [new_resource.lang, new_resource.lc_env.values].flatten.compact.uniq
    required - available
  end
end

def update_locale
  file "Updating system locale" do
    path LOCALE_CONF
    content new_content
  end
end