#==============================================================================
# ** Trailing Characters
#==============================================================================
# SephirothSpawn
# Version 1
# 2006-05-24
#------------------------------------------------------------------------------
# * Instructions:
#
#  ~ Adding Trailing Character:
#    <game_character>.add_trailing_character(<name>, <hue>)
#
#  ~ Deleting Trailing Character at a index
#    <game_character>.delete_trailing_character(<index>)
#
#  ~ Delete Last Trailing Character
#    <game_character>.pop_trailing_character
#
#  ~ Get Last Trailing Character
#    <game_character>.last_trailing_character
#
#  ~ Get Number of Trailing Characters
#    <game_character>.number_of_trailing_characters
#
#  * For Events, Replace <game_character> with
#    $game_map.events[<event_id>]
#
#  * For Player, Replace <game_character> with
#    $game_player
#
#  ~ Enable or Disable Caterpillar
#    $game_player.enable_caterpillar = True (On) or False (Off)
#==============================================================================
#==============================================================================
# ** Game_TrailingCharacter
#==============================================================================

class Game_TrailingCharacter < Game_Character
  #--------------------------------------------------------------------------
  # * Public Instance Variables
  #--------------------------------------------------------------------------
  attr_reader :trail_number
  attr_accessor :character_hue
  attr_accessor :character_name
  attr_accessor :x, :y, :direction
  #--------------------------------------------------------------------------
  # * Screen Z
  #--------------------------------------------------------------------------
  def screen_z(height = 0)
    # Get Original Z Value
    n = super(height)
    # Decrease Z By 1 and return
    return n - @trail_number
  end
  #--------------------------------------------------------------------------
  # * Setup Initialization
  #--------------------------------------------------------------------------
  def setup(parent_character, character_name, character_hue)
    # Set X & Y Coordinates
    @x, @y = parent_character.x, parent_character.y
    @real_x, @real_y = @x * 128, @y * 128
    @direction = parent_character.direction
    # Sets Character Sprite Information
    @character_name = character_name
    @character_hue = character_hue
    # Turns Through On
    @through = true
    # If Parent Character is a Trailing Character
    if parent_character.is_a?(Game_TrailingCharacter)
      # Sets Trailing Number + 1
      @trail_number = parent_character.trail_number + 1
    else
      # Sets 1 to Trailing Number
      @trail_number = 1
    end
  end
  #--------------------------------------------------------------------------
  # * Delete
  #--------------------------------------------------------------------------
  def delete
    # Return No Trailing Sprite
    return if @trailing_character.nil?
    # Switch Properties with trailing sprite
    @character_name = @trailing_character.character_name
    @character_hue = @trailing_character.character_hue
    @trail_number = @trailing_character.trail_number
    # Delete Trail Sprite
    @trailing_character.delete
  end
end

#==============================================================================
# ** Game_Character
#==============================================================================

class Game_Character
  #--------------------------------------------------------------------------
  # * Trailing Character Movements
  #--------------------------------------------------------------------------
  Trailing_Character_Movements = [[], [], [], [], []]
  Trailing_Character_Movements[0][2] = '@trailing_character.move_right'
  Trailing_Character_Movements[1][1] =
    '@direction == 2 ? @trailing_character.move_right : @trailing_character.move_down'
  Trailing_Character_Movements[1][2] =
    '@trailing_character.turn_right unless @trailing_character.direction == 6'
  Trailing_Character_Movements[1][3] =
    '@direction == 8 ? @trailing_character.move_right : @trailing_character.move_up'
  Trailing_Character_Movements[2][0] = '@trailing_character.move_down'
  Trailing_Character_Movements[2][1] =
    '@trailing_character.turn_down unless @trailing_character.direction == 2'
  Trailing_Character_Movements[2][3] =
    '@trailing_character.turn_up unless @trailing_character.direction == 8'
  Trailing_Character_Movements[2][4] = '@trailing_character.move_up'
  Trailing_Character_Movements[3][1] =
    '@direction == 2 ? @trailing_character.move_left : @trailing_character.move_down'
  Trailing_Character_Movements[3][2] =
    '@trailing_character.turn_left unless @trailing_character.direction == 4'
  Trailing_Character_Movements[3][3] =
    '@direction == 8 ? @trailing_character.move_left : @trailing_character.move_up'
  Trailing_Character_Movements[4][2] = '@trailing_character.move_left'
  #--------------------------------------------------------------------------
  # * Public Instance Variables
  #--------------------------------------------------------------------------
  attr_accessor :trailing_character
  #--------------------------------------------------------------------------
  # * Alias Listings
  #--------------------------------------------------------------------------
  alias seph_trailingchara_gmchar_init initialize
  alias seph_trailingchara_gmchar_update update
  alias seph_trailingchara_gmchar_jump jump
  alias seph_trailingchara_gmchar_mt moveto
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  def initialize
    # Original Initialization
    seph_trailingchara_gmchar_init
    # Create Nil Trailing Character
    @trailing_character = nil
  end
  #--------------------------------------------------------------------------
  # * Frame Update
  #--------------------------------------------------------------------------
  def update
    # Original Frame Update
    seph_trailingchara_gmchar_update
    # If Trailing Sprite Exist
    unless @trailing_character.nil?
      # Update Trailing Character
      @trailing_character.update
      # Update Trailing Character Movements
      update_trailing_character_movements
    end
  end
  #--------------------------------------------------------------------------
  # * Jump
  #--------------------------------------------------------------------------
  def jump(x_plus, y_plus)
    # Original Jump Method
    seph_trailingchara_gmchar_jump(x_plus, y_plus)
    # Return if No Trailing Character
    return if @trailing_character.nil?
    # If Jumping
    if self.jumping?
      x_plus = @x - @trailing_character.x
      y_plus = @y - @trailing_character.y
      # Jump Trialing Character
      @trailing_character.jump(x_plus, y_plus)
    end
  end
  #--------------------------------------------------------------------------
  # * Move to Designated Position
  #--------------------------------------------------------------------------
  def moveto(x, y)
    # Original Moveto Method
    seph_trailingchara_gmchar_mt(x, y)
    # Move Trailing Sprite
    unless @trailing_character.nil?
      # Move Trailing Character
      @trailing_character.moveto(x, y)
    end
  end
  #--------------------------------------------------------------------------
  # * Frame Update : Trailing Sprite Movements
  #--------------------------------------------------------------------------
  def update_trailing_character_movements
    # Return if Trailing Character is Moving or Jumping
    return if @trailing_character.moving?  @trailing_character.jumping?
    # Calculate X & Y Difference
    x_diff = @trailing_character.x - @x + 2
    y_diff = @trailing_character.y - @y + 2
    # Trailing Character Movements
    unless Trailing_Character_Movements[x_diff][y_diff].nil?
      eval Trailing_Character_Movements[x_diff][y_diff]
    end
  end
  #--------------------------------------------------------------------------
  # * Add Trailing Character
  #--------------------------------------------------------------------------
  def add_trailing_character(name = '', hue = 0)
    # Add Trailing Character
    if @trailing_character.nil?
      @trailing_character = Game_TrailingCharacter.new
      @trailing_character.setup(self, name, hue)
      # Adds Sprite to Spriteset
      if $scene.is_a?(Scene_Map)
        $scene.spriteset.add_trailing_character(@trailing_character)
      end
    # Add Trailing Character to Trailing Sprite
    else
      @trailing_character.add_trailing_character(name, hue)
    end
  end
  #--------------------------------------------------------------------------
  # * Delete Trailing Character
  #--------------------------------------------------------------------------
  def delete_trailing_character(index = 0)
    # Return if No Trailing Character
    return if @trailing_character.nil?
    # Start Indexing
    n = 0
    tc = @trailing_character
    # Gets Trialing Character Index
    while n < index
      # Return if No Trailing Character
      return if tc.trailing_character.nil?
      # Add Index
      n += 1
      # Get Next Trailing Character
      tc = tc.trailing_character
    end
    # Delete all Trailing Characters
    tc.delete
    # Pop Last Character
    pop_trailing_character
  end
  #--------------------------------------------------------------------------
  # * Pop Trailing Character
  #--------------------------------------------------------------------------
  def pop_trailing_character
    # Return if No Trailing Character
    return nil if @trailing_character.nil?
    # If Trailing Sprite has a trailing Sprite
    if @trailing_character.trailing_character != nil
      @trailing_character.pop_trailing_character
    # Delete Trailing Character
    else
      # Remove from Spriteset
      $scene.spriteset.pop_trailing_character(@trailing_character)
      # Delete Trailing Sprite
      @trailing_character = nil
    end
  end
  #--------------------------------------------------------------------------
  # * Last Trailing Character
  #--------------------------------------------------------------------------
  def last_trailing_character
    # Return nil if no trailing character
    return nil if @trailing_character.nil?
    # Fetches Last Character
    tc = @trailing_character
    until tc.trailing_character.nil?
      tc = tc.trailing_character
    end
    return tc
  end
  #--------------------------------------------------------------------------
  # * Number of Trailing Character
  #--------------------------------------------------------------------------
  def number_of_trailing_characters
    # Returns 0 if no Trailing Character
    return 0 if @trailing_character.nil?
    # Starts Counter
    n = 1
    tc = @trailing_character
    # Adds to Counter when more Trailing Characters
    until tc.trailing_character.nil?
      n += 1
      tc = tc.trailing_character
    end
    # Return Counter
    return n
  end
end

#==============================================================================
# ** Game_Player
#==============================================================================

class Game_Player < Game_Character
  #--------------------------------------------------------------------------
  # * Public Instance Variables
  #--------------------------------------------------------------------------
  attr_reader :enable_caterpillar
  #--------------------------------------------------------------------------
  # * Alias Listings
  #--------------------------------------------------------------------------
  alias seph_catapillar_gmplyr_init initialize
  alias seph_catapillar_gmplyr_refresh refresh
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  def initialize
    # Original Initialization
    seph_catapillar_gmplyr_init
    # Enables Catapillar
    @enable_caterpillar = true
  end
  #--------------------------------------------------------------------------
  # * Enable Caterpiller
  #--------------------------------------------------------------------------
  def enable_caterpillar=(boolean)
    # If Enabling
    if boolean
      @enable_caterpillar = true
    else
      # Deletes Party Members
      ($game_party.actors.size - 1).times do
        delete_trailing_character
      end
      @enable_caterpillar = false
    end
    refresh
  end
  #--------------------------------------------------------------------------
  # * Refresh
  #--------------------------------------------------------------------------
  def refresh
    # Original Refresh
    seph_catapillar_gmplyr_refresh
    # Delete all Trailing Characters
    until number_of_trailing_characters <
          (@enable_caterpillar ? $game_party.actors.size : 1)
      pop_trailing_character
    end
    # Return unless Caterpillar Disabled
    return unless @enable_caterpillar
    # Refreshes Actors
    unless @trailing_character.nil?
      tc, i = @trailing_character, 0
      loop do
        i += 1
        actor = $game_party.actors[i]
        tc.character_name = actor.character_name
        tc.character_hue = actor.character_hue
        tc.trailing_character.nil? ? break : tc = tc.trailing_character
      end
    end
    # Add Party Characters
    for i in (number_of_trailing_characters + 1)...$game_party.actors.size
      # Gets Actor
      actor = $game_party.actors[i]
      # Adds Actor
      add_trailing_character(actor.character_name, actor.character_hue)
    end
  end
  #--------------------------------------------------------------------------
  # * Pop Trailing Character
  #--------------------------------------------------------------------------
  def pop_trailing_character
    # If Caterpillar Enabled
    if @enable_caterpillar
      # If No Extra Trailing Characters
      return if number_of_trailing_characters < $game_party.actors.size
    end
    super
  end
  #--------------------------------------------------------------------------
  # * Delete Trailing Character
  #--------------------------------------------------------------------------
  def delete_trailing_character(index = 0)
    # If Caterpillar Enabled
    if @enable_caterpillar
      # Return if trying to delete a party member
      return if (index + 1) < $game_party.actors.size
    end
    super(index)
  end
end

#==============================================================================
# ** Spriteset_Map
#==============================================================================

class Spriteset_Map
  #--------------------------------------------------------------------------
  # * Alias Listings
  #--------------------------------------------------------------------------
  alias seph_trailingchara_ssetm_init initialize
  #--------------------------------------------------------------------------
  # * Object Initialization
  #--------------------------------------------------------------------------
  def initialize
    # Original Initialization
    seph_trailingchara_ssetm_init
    # Adds Trailing Characters (Player)
    unless $game_player.trailing_character.nil?
      trailing_character = $game_player.trailing_character
      add_trailing_character(trailing_character)
      until trailing_character.trailing_character.nil?
        trailing_character = trailing_character.trailing_character
        add_trailing_character(trailing_character)
      end
    end
    # Adds Trailing Characters (Events)
    for event in $game_map.events.values
      unless event.trailing_character.nil?
        trailing_character = event.trailing_character
        add_trailing_character(trailing_character)
        until trailing_character.trailing_character.nil?
          trailing_character = trailing_character.trailing_character
          add_trailing_character(trailing_character)
        end
      end
    end
  end
  #--------------------------------------------------------------------------
  # * Add Trailing Character
  #--------------------------------------------------------------------------
  def add_trailing_character(character = nil)
    # Return if nil Character
    return if character.nil?
    # Adds Character Sprite
    @character_sprites.push(Sprite_Character.new(@viewport1, character))
  end
  #--------------------------------------------------------------------------
  # * Pop Trailing Character
  #--------------------------------------------------------------------------
  def pop_trailing_character(character)
    # Return if nil character
    return if character.nil?
    # Passes through all Character Sprites
    for sprite in @character_sprites
      # Pops Sprites Character
      if sprite.character == character
        # Disposes Sprite
        sprite.dispose
        # Deletes from Character Sprites
        @character_sprites.delete(sprite)
        return
      end
    end
  end
end

#==============================================================================
# ** Scene_Map
#==============================================================================

class Scene_Map
  attr_accessor :spriteset
end