# @taroxd metadata 1.0
# @require taroxd_core
# @require global
# @id route
# @display 多路线系统
# @help 
#  游戏中的变量和开关是所有路线共有的。
#  该脚本可以进行路线的切换。
#  游戏开始时，路线 id 为 0。
#
#  进入空路线时，队伍无成员，不持有任何物品。玩家的位置不变。
#  建议用以下方式来初始化一条路线：
#  淡出画面 - route.id = id - 初始化路线 - 淡入画面
#
#  -- 用法 -- 在事件脚本中输入 --
#    route.id：获取当前路线的 id。
#    route.id = id：
#      切换到第 id 号路线，无淡入淡出效果。
#    set_route(id)：
#      切换到第 id 号路线，有淡入淡出效果。
#    route << id：将第 id 号路线合并入当前路线，并清除第 id 号路线。
#    route.clear(id)：清除第 id 号路线。

# 路线类，保存了路线 id 和数据。该类的实例会存入存档。
class Taroxd::Route

  # 数据
  class Contents

    attr_reader :party, :map_id, :x, :y, :d

    def initialize
      @party = $game_party
      @map_id = $game_map.map_id
      @x = $game_player.x
      @y = $game_player.y
      @d = $game_player.direction
    end

    def restore
      $game_party = @party
      $game_player.reserve_transfer(@map_id, @x, @y, @d)
    end
  end

  def self.current
    Taroxd::Global[:route] ||= new
  end

  attr_reader :id

  def initialize
    @id = 0
    @data = []   # Contents 实例的数组
  end

  def id=(id)
    return if @id == id
    @data[@id] = Contents.new
    @id = id
    contents = @data[id]
    contents ? contents.restore : init_route
    on_change
  end

  # 合并路线
  def <<(id)
    if @id != id && @data[id]
      $game_party.merge_party(@data[id].party)
      clear(id)
      on_change
    end
    self
  end

  def clear(id = nil)
    id ? @data[id] = nil : @data.clear
  end

  def on_change
    $game_player.refresh
    $game_map.need_refresh = true
  end

  private

  # 进入一条新路线时执行的内容
  def init_route
    $game_party = Game_Party.new
  end
end

class Game_Interpreter

  def route
    Taroxd::Route.current
  end

  # 设置路线并淡入淡出
  def set_route(id)
    return if $game_party.in_battle
    command_221           # 淡出画面
    route.id = id
    Fiber.yield while $game_player.transfer?
    command_222           # 淡入画面
  end

end

class Game_Party < Game_Unit

  # 合并金钱、角色、物品
  def merge_party(other)
    gold, actors, items, weapons, armors = other.merge_contents
    gain_gold(gold)
    @actors |= actors
    merge_item @items,   items,   $data_items
    merge_item @weapons, weapons, $data_weapons
    merge_item @armors,  armors,  $data_armors
  end

  protected

  def merge_contents
    [@gold, @actors, @items, @weapons, @armors]
  end

  private

  def merge_item(to, from, database)
    to.merge!(from) do |id, v1, v2|
      [v1 + v2, max_item_number(database[id])].min
    end
  end
end

# @taroxd metadata 1.0
# @display 动态值槽
# @require taroxd_core
# @id roll_gauge
# @help 给值槽增加动态的滚动效果
class Taroxd::Transition

  # value: 当前值。changing: 当前是否正在变化
  attr_reader :value, :changing

  # get_target.call 获取到变化的数据。可以使用 block 代替 get_target。
  def initialize(duration, get_target = nil, &block)
    @duration = duration
    @get_target = get_target || block
    @value = @target = @get_target.call
    @d = 0
  end

  # 更新值槽的值。如果值槽发生变化，返回 true。
  def update
    @target = @get_target.call
    @changing = @value != @target
    update_transition if @changing
    @changing
  end

  private

  def update_transition
    @d = @duration if @d.zero?
    @d -= 1
    @value = if @d.zero?
      @target
    else
      (@value * @d + @target).fdiv(@d + 1)
    end
  end
end

# include 之后，可用 @gauge_transitions[actor][:hp] 等
# 获取 Taroxd::Transition 的实例。
module Taroxd::RollGauge

  Transition = Taroxd::Transition

  def initialize(*)
    @gauge_transitions = make_gauge_transitions
    @gauge_roll_count = 0
    super
  end

  def update
    super
    if (@gauge_roll_count += 1) >= gauge_roll_interval
      roll_all_gauge if update_gauge_transitions && visible
      @gauge_roll_count = 0
    end
  end

  def draw_actor_hp(actor, x, y, width = 124)
    hp = @gauge_transitions[actor][:hp].value
    rate = hp.fdiv(actor.mhp)
    draw_gauge(x, y, width, rate, hp_gauge_color1, hp_gauge_color2)
    change_color(system_color)
    draw_text(x, y, 30, line_height, Vocab::hp_a)
    draw_current_and_max_values(x, y, width, hp.to_i, actor.mhp,
      hp_color(actor), normal_color)
  end

  def draw_actor_mp(actor, x, y, width = 124)
    mp = @gauge_transitions[actor][:mp].value
    mmp = actor.mmp
    rate = mmp.zero? ? 0 : mp.fdiv(actor.mmp)
    draw_gauge(x, y, width, rate, mp_gauge_color1, mp_gauge_color2)
    change_color(system_color)
    draw_text(x, y, 30, line_height, Vocab::mp_a)
    draw_current_and_max_values(x, y, width, mp.to_i, actor.mmp,
      mp_color(actor), normal_color)
  end

  def draw_actor_tp(actor, x, y, width = 124)
    tp = @gauge_transitions[actor][:tp].value
    rate = tp.fdiv(actor.max_tp)
    draw_gauge(x, y, width, rate, tp_gauge_color1, tp_gauge_color2)
    change_color(system_color)
    draw_text(x, y, 30, line_height, Vocab::tp_a)
    change_color(tp_color(actor))
    draw_text(x + width - 42, y, 42, line_height, tp.to_i, 2)
  end

  private

  # 获取 make_gauge_transitions 生成的对象
  attr_reader :gauge_transitions

  # 值槽滚动所需的帧数
  def gauge_roll_frame
    30
  end

  # 每隔多少帧更新一次值槽
  def gauge_roll_interval
    1
  end

  # 生成值槽变化的数据。可在子类重定义。
  # 默认的定义中，可以通过 gauge_transitions[actor][:hp] 等方式获取数据。
  def make_gauge_transitions
    Hash.new { |hash, actor|
      hash[actor] = Hash.new do |h, k|
        h[k] = Transition.new(gauge_roll_times, actor.method(k))
      end
    }.compare_by_identity
  end

  # 更新渐变的值。
  # 返回真值则触发一次刷新。
  # 每 gauge_roll_interval 帧调用一次。
  def update_gauge_transitions
    need_roll = false
    gauge_transitions.each_value do |hash|
      hash.each_value do |t|
        need_roll = true if t.update
      end
    end
    need_roll
  end

  # 值槽滚动所需的次数。
  def gauge_roll_times
    gauge_roll_frame / gauge_roll_interval
  end

  # 滚动所有值槽。可在子类重定义。
  def roll_all_gauge
    refresh
  end
end

class Window_BattleStatus
  include Taroxd::RollGauge
end

class Window_MenuStatus < Window_Selectable

  include Taroxd::RollGauge

  def roll_all_gauge
    item_max.times do |i|
      actor = $game_party.members[i]
      rect = item_rect(i)
      rect.x += 108
      rect.y += line_height / 2
      contents.clear_rect(rect)
      draw_actor_simple_status(actor, rect.x, rect.y)
    end
  end
end

# @taroxd metadata 1.0
# @display 修复 bug
# @desciption 修复默认系统的一些 bug。详见下方的注释
# @id rgss_bugfix
module Taroxd
  module BugFix
    # Plane#visible 永远返回 true 的 bug。需要主动 include。
    module PlaneVisible

      def initialize(_)
        super
        @__visible = true
      end

      def visible
        @__visible
      end

      def visible=(v)
        @__visible = v
        super
      end
    end
  end
end

class Game_BattlerBase
  # max_tp 不为 100 时，以下两方法返回值错误的 bug
  def tp_rate
    @tp.fdiv(max_tp)
  end

  def regenerate_tp
    self.tp += max_tp * trg
  end
end

class Game_Interpreter
  # 震动画面后等待时间不正确的 bug
  def command_225
    screen.start_shake(@params[0], @params[1], @params[2])
    wait(@params[2]) if @params[3]
  end
end