class PokemonPokedexInfo_Scene
  #todo add indicator to show which one is the main sprite -
  # also maybe add an indicator in main list for when a sprite has available alts

  Y_POSITION_SMALL = 40 #90
  Y_POSITION_BIG = 60
  X_POSITION_PREVIOUS = -30 #20
  X_POSITION_SELECTED = 105
  X_POSITION_NEXT = 340 #380

  Y_POSITION_BG_SMALL = 70
  Y_POSITION_BG_BIG = 93
  X_POSITION_BG_PREVIOUS = -1
  X_POSITION_BG_SELECTED = 145
  X_POSITION_BG_NEXT = 363

  def drawPageForms
    #@selected_index=0

    @sprites["background"].setBitmap(_INTL("Graphics/Pictures/Pokedex/bg_forms"))
    overlay = @sprites["overlay"].bitmap
    base = Color.new(88, 88, 80)
    shadow = Color.new(168, 184, 184)

    #alts_list= pbGetAvailableAlts
    @selected_index = 0
    update_displayed
  end

  def init_selected_bg
    @sprites["bgSelected_previous"] = IconSprite.new(0, 0, @viewport)
    @sprites["bgSelected_previous"].x = X_POSITION_BG_PREVIOUS
    @sprites["bgSelected_previous"].y = Y_POSITION_BG_SMALL
    @sprites["bgSelected_previous"].setBitmap(_INTL("Graphics/Pictures/Pokedex/bg_forms_selected_small"))
    @sprites["bgSelected_previous"].visible = false

    @sprites["bgSelected_center"] = IconSprite.new(0, 0, @viewport)
    @sprites["bgSelected_center"].x = X_POSITION_BG_SELECTED
    @sprites["bgSelected_center"].y = Y_POSITION_BG_BIG
    @sprites["bgSelected_center"].setBitmap(_INTL("Graphics/Pictures/Pokedex/bg_forms_selected_large"))
    @sprites["bgSelected_center"].visible = false

    @sprites["bgSelected_next"] = IconSprite.new(0, 0, @viewport)
    @sprites["bgSelected_next"].x = X_POSITION_BG_NEXT
    @sprites["bgSelected_next"].y = Y_POSITION_BG_SMALL
    @sprites["bgSelected_next"].setBitmap(_INTL("Graphics/Pictures/Pokedex/bg_forms_selected_small"))
    @sprites["bgSelected_next"].visible = false

    @creditsOverlay = BitmapSprite.new(Graphics.width, Graphics.height, @viewport).bitmap

  end

  def initializeSpritesPage(altsList)
    init_selected_bg
    @speciesData = getSpecies(@species)
    @selected_index = 0
    @sprites["selectedSprite"] = IconSprite.new(0, 0, @viewport)
    @sprites["selectedSprite"].x = X_POSITION_SELECTED
    @sprites["selectedSprite"].y = Y_POSITION_BIG
    @sprites["selectedSprite"].z = 999999
    @sprites["selectedSprite"].visible = false
    @sprites["selectedSprite"].zoom_x = 1
    @sprites["selectedSprite"].zoom_y = 1

    @sprites["previousSprite"] = IconSprite.new(0, 0, @viewport)
    @sprites["previousSprite"].x = X_POSITION_PREVIOUS
    @sprites["previousSprite"].y = Y_POSITION_SMALL
    @sprites["previousSprite"].visible = false
    @sprites["previousSprite"].zoom_x = Settings::FRONTSPRITE_SCALE #/2
    @sprites["previousSprite"].zoom_y = Settings::FRONTSPRITE_SCALE #/2

    @sprites["nextSprite"] = IconSprite.new(0, 0, @viewport)
    @sprites["nextSprite"].x = X_POSITION_NEXT
    @sprites["nextSprite"].y = Y_POSITION_SMALL
    @sprites["nextSprite"].visible = false
    @sprites["nextSprite"].zoom_x = Settings::FRONTSPRITE_SCALE #/2
    @sprites["nextSprite"].zoom_y = Settings::FRONTSPRITE_SCALE #/2

    @sprites["selectedSprite"].z = 9999999
    @sprites["previousSprite"].z = 9999999
    @sprites["nextSprite"].z = 9999999

    @sprites["selectedSprite"].setBitmap(altsList[@selected_index])

    if altsList.size >= 2
      @sprites["nextSprite"].setBitmap(altsList[@selected_index + 1])
      @sprites["nextSprite"].visible = true
    end

    if altsList.size >= 3
      @sprites["previousSprite"].setBitmap(altsList[-1])
      @sprites["previousSprite"].visible = true
    end

  end

  def pbGetAvailableForms
    body_id = getBodyID(@species)
    head_id = getHeadID(@species, body_id)
    download_custom_sprite(head_id, body_id)
    download_autogen_sprite(head_id, body_id)
    download_alt_sprites(head_id, body_id)
    return PokedexUtils.new.pbGetAvailableAlts(@species)
  end

  def hide_all_selected_windows
    @sprites["bgSelected_previous"].visible = false if @sprites["bgSelected_previous"]
    @sprites["bgSelected_center"].visible = false if @sprites["bgSelected_center"]
    @sprites["bgSelected_next"].visible = false if @sprites["bgSelected_next"]
  end

  def update_selected
    hide_all_selected_windows
    previous_index = @selected_index == 0 ? @available.size - 1 : @selected_index - 1
    next_index = @selected_index == @available.size - 1 ? 0 : @selected_index + 1

    @sprites["bgSelected_previous"].visible = true if is_main_sprite(previous_index) && @available.size > 2
    @sprites["bgSelected_center"].visible = true if is_main_sprite(@selected_index)
    @sprites["bgSelected_next"].visible = true if is_main_sprite(next_index) && @available.size > 1
  end

  def update_displayed
    @sprites["selectedSprite"].setBitmap(@available[@selected_index])
    nextIndex = @selected_index + 1
    previousIndex = @selected_index - 1
    if nextIndex > @available.size - 1
      nextIndex = 0
    end
    if previousIndex < 0
      previousIndex = @available.size - 1
    end
    @sprites["previousSprite"].visible = false if @available.size <= 2
    @sprites["nextSprite"].visible = false if @available.size <= 1

    @sprites["previousSprite"].setBitmap(@available[previousIndex]) if previousIndex != nextIndex
    @sprites["selectedSprite"].setBitmap(@available[@selected_index])
    @sprites["nextSprite"].setBitmap(@available[nextIndex])

    selected_bitmap = @sprites["selectedSprite"].getBitmap
    is_generated = !selected_bitmap.path.include?(Settings::CUSTOM_BATTLERS_FOLDER_INDEXED)
    showSpriteCredits(selected_bitmap.filename,is_generated)
    update_selected
  end

  def showSpriteCredits(filename,generated_sprite=false)
    @creditsOverlay.dispose

    x = Graphics.width / 2 - 75
    y = Graphics.height - 60
    spritename = File.basename(filename, '.*')

    if !generated_sprite
      discord_name = getSpriteCredits(spritename)
      discord_name = "Unknown artist" if !discord_name
    else
      #todo give credits to Japeal - need to differenciate unfused sprites
      discord_name = ""#"Japeal\n(Generated)"
    end

    author_name = File.basename(discord_name, '#*')

    label_base_color = Color.new(248, 248, 248)
    label_shadow_color = Color.new(104, 104, 104)
    @creditsOverlay = BitmapSprite.new(Graphics.width, Graphics.height, @viewport).bitmap
    textpos = [[author_name, x, y, 0, label_base_color, label_shadow_color]]
    pbDrawTextPositions(@creditsOverlay, textpos)
  end

  def pbChooseForm
    loop do
      @sprites["uparrow"].visible = true
      @sprites["downarrow"].visible = true
      Graphics.update
      Input.update
      pbUpdate
      if Input.trigger?(Input::RIGHT)
        pbPlayCursorSE
        @selected_index -= 1 #(index+@available.length-1)%@available.length
        if @selected_index < 0
          @selected_index = @available.size - 1
        end
        update_displayed
      elsif Input.trigger?(Input::LEFT)
        pbPlayCursorSE
        @selected_index += 1 #= (index+1)%@available.length
        if @selected_index > @available.size - 1
          @selected_index = 0
        end
        update_displayed
      elsif Input.trigger?(Input::BACK)
        pbPlayCancelSE
        break
      elsif Input.trigger?(Input::USE)
        pbPlayDecisionSE
        if select_sprite
          @endscene = true
          break
        end
      end
    end
    @sprites["uparrow"].visible = false
    @sprites["downarrow"].visible = false
  end

  # def is_main_sprite(index = nil)
  #   return false if !@available
  #   if index == nil
  #     index = @selected_index
  #   end
  #   return true if @available.size <= 1
  #   if @speciesData.always_use_generated
  #     selected_sprite = @available[index]
  #     return selected_sprite.start_with?(Settings::BATTLERS_FOLDER)
  #   end
  #   return index == 0
  # end

  def is_main_sprite(index = nil)
    if !index
      index = @selected_index
    end
    selected_sprite = @available[index]
    species_id = getDexNumberForSpecies(@species)
    if $PokemonGlobal.alt_sprite_substitutions[species_id]
      return $PokemonGlobal.alt_sprite_substitutions[species_id] == selected_sprite
    end
    is_generated = !selected_sprite.include?(Settings::CUSTOM_BATTLERS_FOLDER_INDEXED)
    if is_generated
      return !checkIfCustomSpriteExistsByPath(selected_sprite)
    end
    return !sprite_is_alt(selected_sprite)
  end

  def sprite_is_alt(sprite_path)
    spritename = File.basename(sprite_path, '.*')
    return spritename.match?(/[a-zA-Z]/)
  end

  def select_sprite
    if is_main_sprite
      pbMessage("This sprite is already the displayed sprite")
    else
      if pbConfirmMessage(_INTL('Would you like to use this sprite instead of the current sprite?'))
        swap_main_sprite()
        return true
      end
    end
    return false
  end

  def swap_main_sprite
    old_main_sprite = @available[0]
    new_main_sprite = @available[@selected_index]
    species_number = dexNum(@species)
    set_alt_sprite_substitution(species_number, new_main_sprite)
  end



  # def swap_main_sprite
  #   begin
  #     old_main_sprite = @available[0]
  #     new_main_sprite = @available[@selected_index]
  #
  #     if main_sprite_is_non_custom()
  #       @speciesData.set_always_use_generated_sprite(false)
  #       return
  #       # new_name_without_ext = File.basename(old_main_sprite, ".png")
  #       # new_name_without_letter=new_name_without_ext.chop
  #       # File.rename(new_main_sprite, Settings::CUSTOM_BATTLERS_FOLDER+new_name_without_letter + ".png")
  #     end
  #
  #     if new_main_sprite.start_with?(Settings::BATTLERS_FOLDER)
  #       @speciesData.set_always_use_generated_sprite(true)
  #       return
  #       # new_name_without_ext = File.basename(old_main_sprite, ".png")
  #       # File.rename(old_main_sprite, Settings::CUSTOM_BATTLERS_FOLDER+new_name_without_ext+"x" + ".png")x
  #       # return
  #     end
  #     File.rename(new_main_sprite, new_main_sprite + "temp")
  #     File.rename(old_main_sprite, new_main_sprite)
  #     File.rename(new_main_sprite + "temp", old_main_sprite)
  #   rescue
  #     pbMessage("There was an error while swapping the sprites. Please save and restart the game as soon as possible.")
  #   end
  # end

  # def main_sprite_is_non_custom()
  #   speciesData = getSpecies(@species)
  #   return speciesData.always_use_generated || @available.size <= 1
  # end
end

class PokemonGlobalMetadata
  attr_accessor :alt_sprite_substitutions

  def initialize
    @alt_sprite_substitutions = {}
  end
end

def set_alt_sprite_substitution(original_sprite_name, selected_alt)
  if !$PokemonGlobal.alt_sprite_substitutions
    $PokemonGlobal.alt_sprite_substitutions = {}
  end
  $PokemonGlobal.alt_sprite_substitutions[original_sprite_name] = selected_alt
end