[RGSS] Mana Shield State

#==============================================================================
# [RGSS] Mana Shield
# Version : 1.1
# Author : LowlingLife
#==============================================================================
# Membuat state yang membuat damage di-deal ke SP, bukan ke HP.
#==============================================================================
# CHANGELOG :
# V. 1.0 | Initial Release
# V. 1.1 | Add Half Damage State
#==============================================================================
module ManaShield
  # ID dari State yang akan mengalihkan damage ke SP secara Full.
  FULL_STATE = [17, 18, 19]

  # ID dari State dimana separuh damage dialihkan ke SP dan separuh lagi
  # dialihkan ke HP.
  HALF_STATE = [20, 21, 22]

  # ID dari State dimana hanya separuh damage yang dialihkan ke SP tapi
  # separuhnya tidak dialihkan ke HP.
  HALF_DAMAGE_STATE = [23, 24, 25]

  # Set ke true jika ingin memakai fitur Overflow. Jika Damage yang di-deal
  # lebih besar daripada SP, sisanya akan di deal ke HP.
  OVERFLOW = false

  # Set ke true jika ingin Mana Shield State otomatis di-remove setelah
  # mendapat damage yang lebih besar dari pada SP.
  # Note : Uncheck Release at the end of battle jika menggunakan opsi ini.
  AUTO_REMOVE = true

  # Set ke true jika ingin agar Mana Shield tetap men-deal damage yang
  # disebabkan Skill ke SP.
  SKILL_PROTECTION = true

  # Set ke true jika ingin agar Mana Shield tetap men-deal damage yang
  # disebakan Slip Damage ke SP.
  SLIP_DAMAGE_PROTECTION = true
end
#==============================================================================
# EDITING BEYOND THIS LINE CAN CAUSE DAMAGE TO YOUR GAME. THEREFORE, EDIT
# WITH YOUR OWN RISK!
#==============================================================================
class Game_Battler
  include ManaShield

  attr_accessor :overflow
  attr_accessor :sp_damage
  attr_accessor :hp_damage

  #----------------------------------------------------------------------------
  # INITIALIZE
  #----------------------------------------------------------------------------
  alias mana_shield_initialize initialize unless $@
  def initialize
    # Run the old method
    mana_shield_initialize
    @overflow = 0
    @sp_damage = 0
    @hp_damage = 0
  end

  #----------------------------------------------------------------------------
  # CHECK MANA SHIELD
  #----------------------------------------------------------------------------
  def check_mana_shield
    if FULL_STATE.any?{|s| @states.include?(s)}
      @sp_damage = self.damage
      self.sp -= @sp_damage

      if @sp_damage > self.sp
        # Jika memakai opsi OVERFLOW
        if OVERFLOW
          @overflow = @sp_damage - self.sp
          self.sp -= @sp_damage - @overflow
          self.hp -= @overflow
        # Jika tidak.
        else
          @overflow = @sp_damage - self.sp
          self.sp -= @sp_damage - @overflow
        end
        for s in FULL_STATE
          @states.delete(s) if AUTO_REMOVE
          @states_turn.delete(s) if AUTO_REMOVE
        end
      end

    elsif HALF_STATE.any?{|s| @states.include?(s)}
      @sp_damage = self.damage - (self.damage / 2)
      @hp_damage = self.damage - (self.damage / 2)
      self.sp -= @sp_damage
      self.hp -= @hp_damage

      if @sp_damage > self.sp
        # Jika memakai opsi OVERFLOW
        if OVERFLOW
          @overflow = @sp_damage - self.sp
          self.sp -= @sp_damage - @overflow
          self.hp -= @overflow
        # Jika tidak.
        else
          @overflow = @sp_damage - self.sp
          self.sp -= @sp_damage - @overflow
        end
        for s in HALF_STATE
          @states.delete(s) if AUTO_REMOVE
          @states_turn.delete(s) if AUTO_REMOVE
        end
      end

    elsif HALF_DAMAGE_STATE.any?{|s| @states.include?(s)}
      @sp_damage = self.damage - (self.damage / 2)
      self.sp -= @sp_damage

      if @sp_damage > self.sp
        # Jika memakai opsi OVERFLOW
        if OVERFLOW
          @overflow = @sp_damage - self.sp
          self.sp -= @sp_damage - @overflow
          self.hp -= @overflow
        # Jika tidak.
        else
          @overflow = @sp_damage - self.sp
          self.sp -= @sp_damage - @overflow
        end
        for s in HALF_STATE
          @states.delete(s) if AUTO_REMOVE
          @states_turn.delete(s) if AUTO_REMOVE
        end
      end

    else
      self.hp -= self.damage
    end
  end

  #----------------------------------------------------------------------------
  # ATTACK EFFECT
  #----------------------------------------------------------------------------
  def attack_effect(attacker)
    # Clear critical flag
    self.critical = false
    # First hit detection
    hit_result = (rand(100) < attacker.hit)
    # If hit occurs
    if hit_result == true
      # Calculate basic damage
      atk = [attacker.atk - self.pdef / 2, 0].max
      self.damage = atk * (20 + attacker.str) / 20
      # Element correction
      self.damage *= elements_correct(attacker.element_set)
      self.damage /= 100
      # If damage value is strictly positive
      if self.damage > 0
        # Critical correction
        if rand(100) < 4 * attacker.dex / self.agi
          self.damage *= 2
          self.critical = true
        end
        # Guard correction
        if self.guarding?
          self.damage /= 2
        end
      end
      # Dispersion
      if self.damage.abs > 0
        asp = [self.damage.abs * 15 / 100, 1].max
        self.damage += rand(asp+1) + rand(asp+1) - asp
      end
      # Second hit detection
      eva = 8 * self.agi / attacker.dex + self.eva
      hit = self.damage < 0 ? 100 : 100 - eva
      hit = self.cant_evade? ? 100 : hit
      hit_result = (rand(100) < hit)
    end
    # If hit occurs
    if hit_result == true
      # State Removed by Shock
      remove_states_shock
      # Substract damage from HP
      check_mana_shield
      # State change
      @state_changed = false
      states_plus(attacker.plus_state_set)
      states_minus(attacker.minus_state_set)
    # When missing
    else
      # Set damage to "Miss"
      self.damage = "Miss"
      # Clear critical flag
      self.critical = false
    end
    # End Method
    return true
  end

  #----------------------------------------------------------------------------
  # SKILL EFFECT
  #----------------------------------------------------------------------------
  def skill_effect(user, skill)
    # Clear critical flag
    self.critical = false
    # If skill scope is for ally with 1 or more HP, and your own HP = 0,
    # or skill scope is for ally with 0, and your own HP = 1 or more
    if ((skill.scope == 3 or skill.scope == 4) and self.hp == 0) or
       ((skill.scope == 5 or skill.scope == 6) and self.hp >= 1)
      # End Method
      return false
    end
    # Clear effective flag
    effective = false
    # Set effective flag if common ID is effective
    effective |= skill.common_event_id > 0
    # First hit detection
    hit = skill.hit
    if skill.atk_f > 0
      hit *= user.hit / 100
    end
    hit_result = (rand(100) < hit)
    # Set effective flag if skill is uncertain
    effective |= hit < 100
    # If hit occurs
    if hit_result == true
      # Calculate power
      power = skill.power + user.atk * skill.atk_f / 100
      if power > 0
        power -= self.pdef * skill.pdef_f / 200
        power -= self.mdef * skill.mdef_f / 200
        power = [power, 0].max
      end
      # Calculate rate
      rate = 20
      rate += (user.str * skill.str_f / 100)
      rate += (user.dex * skill.dex_f / 100)
      rate += (user.agi * skill.agi_f / 100)
      rate += (user.int * skill.int_f / 100)
      # Calculate basic damage
      self.damage = power * rate / 20
      # Element correction
      self.damage *= elements_correct(skill.element_set)
      self.damage /= 100
      # If damage value is strictly positive
      if self.damage > 0
        # Guard correction
        if self.guarding?
          self.damage /= 2
        end
      end
      # Dispersion
      if skill.variance > 0 and self.damage.abs > 0
        amp = [self.damage.abs * skill.variance / 100, 1].max
        self.damage += rand(amp+1) + rand(amp+1) - amp
      end
      # Second hit detection
      eva = 8 * self.agi / user.dex + self.eva
      hit = self.damage < 0 ? 100 : 100 - eva * skill.eva_f / 100
      hit = self.cant_evade? ? 100 : hit
      hit_result = (rand(100) < hit)
      # Set effective flag if skill is uncertain
      effective |= hit < 100
    end
    # If hit occurs
    if hit_result == true
      # If physical attack has power other than 0
      if skill.power != 0 and skill.atk_f > 0
        # State Removed by Shock
        remove_states_shock
        # Set to effective flag
        effective = true
      end
      # Substract damage from HP
      last_hp = self.hp
      check_mana_shield if SKILL_PROTECTION
      effective |= self.hp != last_hp
      # State change
      @state_changed = false
      effective |= states_plus(skill.plus_state_set)
      effective |= states_minus(skill.minus_state_set)
      # If power is 0
      if skill.power == 0
        # Set damage to an empty string
        self.damage = ""
        # If state is unchanged
        unless @state_changed
          # Set damage to "Miss"
          self.damage = "Miss"
        end
      end
    # If miss occurs
    else
      # Set damage to "Miss"
      self.damage = "Miss"
    end
    # If not in battle
    unless $game_temp.in_battle
      # Set damage to nil
      self.damage = nil
    end
    # End Method
    return effective
  end
  #--------------------------------------------------------------------------
  # SLIP DAMAGE EFFECT
  #--------------------------------------------------------------------------
  def slip_damage_effect
    # Set damage
    self.damage = self.maxhp / 10
    # Dispersion
    if self.damage.abs > 0
      amp = [self.damage.abs * 15 / 100, 1].max
      self.damage += rand(amp+1) + rand(amp+1) - amp
    end
    # Subtract damage from HP
    check_mana_shield if SLIP_DAMAGE_PROTECTION
    # End Method
    return true
  end
  #============================================================================
  # END OF SCRIPT
  #============================================================================
end