class PokeBattle_Scene
  #=============================================================================
  # Create the battle scene and its elements
  #=============================================================================
  def initialize
    @battle       = nil
    @abortable    = false
    @aborted      = false
    @battleEnd    = false
    @animations   = []
    @frameCounter = 0
  end

  # Called whenever the battle begins.
  def pbStartBattle(battle)
    @battle   = battle
    @viewport = Viewport.new(0,0,Graphics.width,Graphics.height)
    @viewport.z = 99999
    @lastCmd  = Array.new(@battle.battlers.length,0)
    @lastMove = Array.new(@battle.battlers.length,0)
    pbInitSprites
    pbBattleIntroAnimation
  end

  def pbInitSprites
    @sprites = {}
    # The background image and each side's base graphic
    pbCreateBackdropSprites
    # Create message box graphic
    messageBox = pbAddSprite("messageBox",0,Graphics.height-96,
       "Graphics/Pictures/Battle/overlay_message",@viewport)
    messageBox.z = 195
    # Create message window (displays the message)
    msgWindow = Window_AdvancedTextPokemon.newWithSize("",
       16,Graphics.height-96+2,Graphics.width-32,96,@viewport)
    msgWindow.z              = 200
    msgWindow.opacity        = 0
    msgWindow.baseColor      = PokeBattle_SceneConstants::MESSAGE_BASE_COLOR
    msgWindow.shadowColor    = PokeBattle_SceneConstants::MESSAGE_SHADOW_COLOR
    msgWindow.letterbyletter = true
    @sprites["messageWindow"] = msgWindow
    # Create command window
    @sprites["commandWindow"] = CommandMenuDisplay.new(@viewport,200)
    # Create fight window
    @sprites["fightWindow"] = FightMenuDisplay.new(@viewport,200)
    # Create targeting window
    @sprites["targetWindow"] = TargetMenuDisplay.new(@viewport,200,@battle.sideSizes)
    pbShowWindow(MESSAGE_BOX)
    # The party lineup graphics (bar and balls) for both sides
    for side in 0...2
      partyBar = pbAddSprite("partyBar_#{side}",0,0,
         "Graphics/Pictures/Battle/overlay_lineup",@viewport)
      partyBar.z       = 120
      partyBar.mirror  = true if side==0   # Player's lineup bar only
      partyBar.visible = false
      for i in 0...PokeBattle_SceneConstants::NUM_BALLS
        ball = pbAddSprite("partyBall_#{side}_#{i}",0,0,nil,@viewport)
        ball.z       = 121
        ball.visible = false
      end
      # Ability splash bars
      if PokeBattle_SceneConstants::USE_ABILITY_SPLASH
        @sprites["abilityBar_#{side}"] = AbilitySplashBar.new(side,@viewport)
        if $game_switches[SWITCH_DOUBLE_ABILITIES]
          @sprites["ability2Bar_#{side}"] = AbilitySplashBar.new(side,@viewport,true)
          @sprites["ability2Bar_#{side}"].y = @sprites["ability2Bar_#{side}"].y+30
        end
      end
    end
    # Player's and partner trainer's back sprite
    @battle.player.each_with_index do |p,i|
      pbCreateTrainerBackSprite(i,p.trainer_type,@battle.player.length)
    end
    # Opposing trainer(s) sprites
    if @battle.trainerBattle?
      @battle.opponent.each_with_index do |p,i|
        pbCreateTrainerFrontSprite(i,p.trainer_type,@battle.opponent.length)
      end
    end
    # Data boxes and Pokémon sprites
    @battle.battlers.each_with_index do |b,i|
      next if !b
      @sprites["dataBox_#{i}"] = PokemonDataBox.new(b,@battle.pbSideSize(i),@viewport)
      pbCreatePokemonSprite(i)
    end
    # Wild battle, so set up the Pokémon sprite(s) accordingly
    if @battle.wildBattle?
      @battle.pbParty(1).each_with_index do |pkmn,i|
        index = i*2+1
        pbChangePokemon(index,pkmn)
        pkmnSprite = @sprites["pokemon_#{index}"]
        pkmnSprite.tone    = Tone.new(-80,-80,-80)
        pkmnSprite.visible = true
      end
    end
  end

  def pbCreateBackdropSprites
    case @battle.time
    when 1 then time = "eve"
    when 2 then time = "night"
    end
    # Put everything together into backdrop, bases and message bar filenames
    backdropFilename = @battle.backdrop.downcase
    baseFilename = @battle.backdrop.downcase
    baseFilename = sprintf("%s_%s",baseFilename,@battle.backdropBase).downcase if @battle.backdropBase
    messageFilename = @battle.backdrop.downcase
    if time
      trialName = sprintf("%s_%s",backdropFilename,time).downcase
      if pbResolveBitmap(sprintf("Graphics/Battlebacks/"+trialName+"_bg"))
        backdropFilename = trialName
      end
      trialName = sprintf("%s_%s",baseFilename,time).downcase
      if pbResolveBitmap(sprintf("Graphics/Battlebacks/"+trialName+"_base0"))
        baseFilename = trialName
      end
      trialName = sprintf("%s_%s",messageFilename,time).downcase
      if pbResolveBitmap(sprintf("Graphics/Battlebacks/"+trialName+"_message"))
        messageFilename = trialName
      end
    end
    if !pbResolveBitmap(sprintf("Graphics/Battlebacks/"+baseFilename+"_base0")) &&
       @battle.backdropBase
      baseFilename = @battle.backdropBase
      if time
        trialName = sprintf("%s_%s",baseFilename,time).downcase
        if pbResolveBitmap(sprintf("Graphics/Battlebacks/"+trialName+"_base0"))
          baseFilename = trialName
        end
      end
    end
    # Finalise filenames
    # battleBG   = "Graphics/Battlebacks/"+backdropFilename+"_bg"
    # playerBase = "Graphics/Battlebacks/"+baseFilename+"_base0"
    # enemyBase  = "Graphics/Battlebacks/"+baseFilename+"_base1"
    # messageBG  = "Graphics/Battlebacks/"+messageFilename+"_message"

    battleBG   = "Graphics/Battlebacks/battlebg/"+backdropFilename
    playerBase = "Graphics/Battlebacks/playerbase/"+baseFilename
    enemyBase  = "Graphics/Battlebacks/enemybase/"+baseFilename
    messageBG  = "Graphics/Battlebacks/"+messageFilename+"_message"
    if !pbResolveBitmap(messageBG)
      messageBG = "Graphics/Battlebacks/default_message"
    end
    # Apply graphics
    bg = pbAddSprite("battle_bg",0,0,battleBG,@viewport)
    bg.z = 0
    bg = pbAddSprite("battle_bg2",-Graphics.width,0,battleBG,@viewport)
    bg.z      = 0
    bg.mirror = true
    for side in 0...2
      baseX, baseY = PokeBattle_SceneConstants.pbBattlerPosition(side)
      base = pbAddSprite("base_#{side}",baseX,baseY,
         (side==0) ? playerBase : enemyBase,@viewport)
      base.z    = 1
      if base.bitmap
        base.ox = base.bitmap.width/2
        base.oy = (side==0) ? base.bitmap.height : base.bitmap.height/2
      end
    end
    cmdBarBG = pbAddSprite("cmdBar_bg",0,Graphics.height-96,messageBG,@viewport)
    cmdBarBG.z = 180
  end

  def pbCreateTrainerBackSprite(idxTrainer,trainerType,numTrainers=1)
    if idxTrainer==0   # Player's sprite
      trainerFile = GameData::TrainerType.player_back_sprite_filename(trainerType)
    else   # Partner trainer's sprite
      trainerFile = GameData::TrainerType.back_sprite_filename(trainerType)
    end
    spriteX, spriteY = PokeBattle_SceneConstants.pbTrainerPosition(0,idxTrainer,numTrainers)
    trainer = pbAddSprite("player_#{idxTrainer+1}",spriteX,spriteY,trainerFile,@viewport)
    return if !trainer.bitmap
    # Alter position of sprite
    trainer.z  = 30+idxTrainer
    if trainer.bitmap.width>trainer.bitmap.height*2
      trainer.src_rect.x     = 0
      trainer.src_rect.width = trainer.bitmap.width/5
    end
    trainer.ox = trainer.src_rect.width/2
    trainer.oy = trainer.bitmap.height
  end

  def pbCreateTrainerFrontSprite(idxTrainer,trainerType,numTrainers=1)
    trainerFile = GameData::TrainerType.front_sprite_filename(trainerType)
    spriteX, spriteY = PokeBattle_SceneConstants.pbTrainerPosition(1,idxTrainer,numTrainers)
    trainer = pbAddSprite("trainer_#{idxTrainer+1}",spriteX,spriteY,trainerFile,@viewport)
    return if !trainer.bitmap
    # Alter position of sprite
    trainer.z  = 7+idxTrainer
    trainer.ox = trainer.src_rect.width/2
    trainer.oy = trainer.bitmap.height
  end

  def pbCreatePokemonSprite(idxBattler)
    sideSize = @battle.pbSideSize(idxBattler)
    batSprite = PokemonBattlerSprite.new(@viewport,sideSize,idxBattler,@animations)
    @sprites["pokemon_#{idxBattler}"] = batSprite
    shaSprite = PokemonBattlerShadowSprite.new(@viewport,sideSize,idxBattler)
    shaSprite.visible = false
    @sprites["shadow_#{idxBattler}"] = shaSprite
  end
end