Enemy Upgrading by Sky

#===========================================================================
#
# Sky's Enemy (Up/De)grading by Turn
# Version 1.0
# Started May 21, 2010
# Comlete May 22, 2010
#
#===========================================================================
#
# Features :
#    Version 1.0 -
#       - Enemies get stronger or weaker every
#         certain amount of turns.
#
#===========================================================================
#
# Credit (be sure to credit the following and rpgmakervx.net)
# Sky00Valentine :creator and editor (You aren't required to include me, but I wouldn't mind if you did.)
#    //mitch.exe :for requesting the script
#
#===========================================================================
#
# Terms of Use
# ------------
#
#     Crediting Rpgmakervx.net and //mitch.exe is the only thing I ask.
#     However feel free to credit Sky00Valentine if you
#     see fit.
#
#===========================================================================
#
# Future improvement
# ------------------
#
#    - Adding the ability to add or change states also(im lazy right now)
#    - Adding the ability to stop upgrading or degrading after a set number
#      of times.
#    - Adding the ability to change stats based on a different stat.
#    - Maybe adding in custom stats as well.
#
#===========================================================================
#
# Instructions & Installation
# ---------------------------
# - add under any custom battle scripts and/or Materials
#
# - These are the 'commands' you add to an enemy's notebox
#
#  command is basically what you want to do
#   x:y  (x is the number you want to use)
#        (: stands for per)
#        (y is the number of turns)
#  so 3:2 means 3 per 2 turns
#  this will be repeated below to help understand after you see the actual
#  commands
#
# command  x:y
#    |      |
#    |      |
#    V      V
# <ATKCON+ x:y>  --> Adds a constant number to enemy attack
# <DEFCON+ x:y>  --> Adds a constant number to enemy defense
# <AGICON+ x:y>  --> Adds a constant number to enemy agility
# <SPICON+ x:y>  --> Adds a constant number to enemy spirit
# <ATKCON- x:y>  --> Subracts a constant number from enemy attack
# <DEFCON- x:y>  --> Subracts a constant number from enemy defense
# <AGICON- x:y>  --> Subracts a constant number from enemy agility
# <SPICON- x:y>  --> Subracts a constant number from enemy spirit
# <ATKPER+ x:y>  --> Adds a percentage of enemy attack to enemy attack
# <DEFPER+ x:y>  --> Adds a percentage of enemy attack to enemy defense
# <AGIPER+ x:y>  --> Adds a percentage of enemy attack to enemy agility
# <SPIPER+ x:y>  --> Adds a percentage of enemy attack to enemy spirit
# <ATKPER- x:y>  --> Subtracts a percentage of enemy attack from enemy attack
# <DEFPER- x:y>  --> Subtracts a percentage of enemy attack from enemy defense
# <AGIPER- x:y>  --> Subtracts a percentage of enemy attack from enemy agility
# <SPIPER- x:y>  --> Subtracts a percentage of enemy attack from enemy spirit
#
#
#  command is basically what you want to do
#   x:y  (x is the number you want to use)
#        (: stands for per)
#        (y is the number of turns)
#  so <ATKCON+ 10:4>  means this enemy will gain 10 more attack every 4 turns
#     <AGIPER- 5:10>  means this enemy will lose 5 percent of thier current
#                     agility every 10 turns
#
#===========================================================================
#
# Compatibility & Bugs
# --------------------
# Not sure if this will work with other custom battle scripts but
# it should as far as I can tell.
#
#===========================================================================

class Scene_Battle
  alias get_stronger_by_turn turn_end
  def turn_end
    for i in 0...$game_troop.members.size
      text = $game_troop.members[i].enemy.note
      unless $game_troop.members[i].dead?
        text.each_line{|x| line = x[0,x.index(">") + 1]
          unless line == nil
            variable_list = line[9..(line.index('>') - 1)]
            variables =  variable_list.split(":")
            if line.include?("<ATKCON")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].atk += variables[0].to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].atk -= variables[0].to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
            if line.include?("<DEFCON")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].def += variables[0].to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].def -= variables[0].to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
            if line.include?("<AGICON")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].agi += variables[0].to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].agi -= variables[0].to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
            if line.include?("<SPICON")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].spi += variables[0].to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].spi -= variables[0].to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
            if line.include?("<ATKPER")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].atk += (($game_troop.members[i].atk / 100.0 * variables[0].to_i).round).to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].atk -= (($game_troop.members[i].atk / 100.0 * variables[0].to_i).round).to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
            if line.include?("<DEFPER")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].def += (($game_troop.members[i].def / 100.0 * variables[0].to_i).round).to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].def -= (($game_troop.members[i].def / 100.0 * variables[0].to_i).round).to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
            if line.include?("<AGIPER")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].agi += (($game_troop.members[i].agi / 100.0 * variables[0].to_i).round).to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].agi -= (($game_troop.members[i].agi / 100.0 * variables[0].to_i).round).to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
            if line.include?("<SPIPER")
              if line[7,1] == "+"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].spi += (($game_troop.members[i].spi / 100.0 * variables[0].to_i).round).to_i
                end
              elsif line[7,1] == "-"
                if ($game_troop.turn_count % variables[1].to_i) == 0
                  $game_troop.members[i].spi -= (($game_troop.members[i].spi / 100.0 * variables[0].to_i).round).to_i
                end
              else
                raise Exception.new("#{line[7,1]} is not a valid function")
              end
            end
          end
        }
      end
    end
    get_stronger_by_turn
  end
end