require 'readline'
require 'net/http'
require 'net/https'
require 'rho_connect_install_constants'
require 'rho_connect_install_installers'
require 'rho_connect_install_checkers'
require 'rho_connect_install_dnd'

include Installers
include Checkers
include DownloadAndDocompress

module Utilities
  extend self

  # get_elapsed_time
  # This method returns the time since the given initial_time
  def get_elapsed_time(initial_time)
    #get time difference
    elapsed_time = Time.now - initial_time
    #determine if time is displayed in hours, minutes, or seconds
    if elapsed_time >= 3600
      elapsed_time /= 60
      time_units = "hours"
    elsif elapsed_time >= 60 && elapsed_time < 3600
      elapsed_time /= 60
      time_units = "minutes"
    else
      time_units = "seconds"
    end #if

    #round elapsed_time to 3 decimal values
    elapsed_time = (elapsed_time * 10**3).round.to_f / 10**3
    elapsed_time.to_s << " " + time_units
  end #get_elapsed_time
 
  # log_print
  # This method displays, in minutes, how long the installation process took
  def log_print(string)
    puts string 
    @log.info {string}  unless @log == nil
  end #log_print

  private
  
  # cmd
  # This method issues the given system command and calls log_print for output
  def cmd(cmd)
    log_print cmd
    log_print `#{ cmd }`
  end #cmd

  #set_log_file
  def set_log_file(log)
    @log = log
  end #set_log_file 
  
  # print_header
  # This method displays a header surrounded by '=' characters consisting of
  # the given string
  def print_header(string)
    header = "\n"
    border = "===="
    string.each_char { border << "=" }
    header << border + "\n"
    header << "= " + string + " =\n"
    header << border +"\n"
    log_print header
  end #print_header
  
  # cleanup
  # This method moves all compressed files from the installation directory
  # that were downloaded by this installation process
  def cleanup(prefix, options)
    print_header "Cleaning up"
    Dir.mkdir("#{prefix}downloads") unless File.directory?("#{prefix}downloads")
    Constants::URLS.each do |url|
      file = get_version url
      if File.exists?("#{prefix}#{file}")
        cmd "rm -rf #{prefix}downloads/#{file}"
        cmd "mv #{prefix}#{file}* #{prefix}downloads"
      end #if
    end # do
  end #cleanup
end #Utilities