require 'singleton'
class ToolsLog
  include Singleton

  def initialize(options = {}); end

  # Create a Log file in work area
  #
  #  Sample
  #
  #  ToolsLog.create_log_file 'sample', '/myhome/tools/sample.log'
  #  log = ToolsUtil.get_variable "sample_logger" => Logger Object
  #
  #  ToolsLog.create_log_file 'xyko', '/home/francisco/2018/xykotools/tools/xyko.log'
  #  ToolsLog.xyko_info 'teste do methodo1', :light_yellow
  #  ToolsLog.xyko_warn 'teste do methodo2'
  #  ToolsLog.xyko_error 'teste do methodo3'
  #  ToolsLog.xyko_debug 'teste do methodo4'
  #
  # @param log_name LogName to create
  # @param log_file LogFile path
  # @return
  def self.create_log_file(log_name, log_file)
    if File.exist? log_file
      File.delete(log_file) unless File.ctime(log_file).to_date == Time.now.to_date
    end
    ToolsUtil.set_variable "#{log_name}_log_file", log_file
    ToolsUtil.set_variable "#{log_name}_logger", Logger.new(log_file, 'daily')
    (ToolsUtil.get_variable "#{log_name}_logger").formatter = proc do |severity, datetime, _progname, msg|
      "#{severity.chars.first} #{datetime.strftime '%H:%M:%S'}: #{msg}\n"
    end
    # ToolsUtil.purge_files Tools.home+'/.tools/backup', '*', 14*24*60*60
  end

  def self.method_missing(method, *args)
    # expected call format =>    STRING_LOGGER_TYPE + '_' + LOGGER_TYPE
    # Ex.:  tools_info
    logger_name   = method.to_s.split('_').first
    logger_method = method.to_s.split('_').last
    logger        = ToolsUtil.get_variable "#{logger_name}_logger"
    color         = args.extract_color
    if color.eql? :default
      case logger_method
      when 'info'
        color = :cyan
      when 'warn'
        color = :yellow
      when 'debug'
        color = :green
      when 'error'
        color = :light_red
      when 'ucolor'
        color = nil
        logger_method = 'info'
      else
        return false
      end
    end
    text_to_print = if color.nil?
                      args.first
                    else
                      args.first.colorize(color)
                    end
    logger.method(logger_method).call text_to_print
  end
end