# WebROaR - Ruby Application Server - http://webroar.in/
# Copyright (C) 2009  Goonj LLC
#
# This file is part of WebROaR.
#
# WebROaR is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# WebROaR is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with WebROaR.  If not, see <http://www.gnu.org/licenses/>.
#

require 'rubygems'

module Webroar
  module UserInteraction
    def choose_gem_version
      print "Checking for any previous installation of WebROaR ... "
      list = Gem.source_index.find_name(/^webroar$/)

      unless list
        puts "not found."
        return nil
      end

      #gem_names = list.collect {|gem| gem.full_name}
      gem_list = list.collect {|gem| gem.version}
      gem_list.each_with_index do |item, index|
        if !File.exist?(File.join(WEBROAR_ROOT,"..","webroar-#{item}","conf","config.yml"))
          gem_list.delete(item)
        end
      end

      if gem_list.length == 0
        puts "not found."
        return nil
      end

      puts "found."
      gem_name = "WebROaR-" + gem_list[gem_list.length - 1].to_s
      require File.join(WEBROAR_ROOT, 'src', 'ruby_lib', 'ruby_interface','version.rb')
      choice_list = [ "Import configuration, logs and admin panel data from the previous installation – #{gem_name}.",
        "No import required, install #{Webroar::SERVER} afresh."]

      puts ""
      puts "Please enter your choice from the options below:"

      choice_list.each_with_index do |item, index|
        puts " #{index+1}. #{item}"
      end
      print "> "

      result = STDIN.gets.chomp("\n")
      return nil unless result =~ /^\d+$/
      result = result.to_i
      return gem_name if result == 1
      return nil
      
      #return nil if result < 1 or (gem_names.length - 1) < result
      #return gem_names[result-1]
    end
    
    # User input to install WebROaR
    def user_input
      import_from = choose_gem_version
      return nil, true, import_from if import_from
      
      puts "Setting up server admin panel ..."
      
      while(true)
        print "Please enter a username for the administrator account of server's admin panel: "
        username = STDIN.gets.chomp("\n")
        if(username.length < 1)
          #puts "Please enter a username."
          redo
        else
          break
        end
      end
      while(true)
        print "Please enter a password(minimum 6 characters) for the administrator account of server's admin panel: "
        system("stty -echo")
        pswd = STDIN.gets.chomp("\n")
        if(pswd.length < 6)
          puts "\nPlease enter a password with at least 6 characters."
          redo
        end 
        print "\nConfirm password: "
        re_pswd = STDIN.gets.chomp("\n")
        system("stty echo")
        print "\n"
        if(re_pswd  == pswd)
          write_user(username, pswd)
          break
        else
          puts "\nPasswords do not match. Please try again."
          redo
        end
      end
      puts "Setting up server specifications ..."
    
      while(true)
        print "Enter server port (default is 3000): "
        port_s = STDIN.gets.chomp
        if port_s == ""
          port = 3000
          break
        else
          unless port_s=~/^\d+$/
            puts "\nInvalid port number. Valid port is a number between 1 and 65535. Please try again ..."
            redo
          end
          port = port_s.to_i
          if(port < 1 or port > 65535)
            puts "\nInvalid port number. Valid port is a number between 1 and 65535. Please try again ..."
            redo
          else
            break
          end
        end
      end
      return port, false, nil
    end  
  end
end