module RubyPager

  class Text_Region
    attr_reader :id, :index, :custom, :contour
    def initialize(ex_index, ex_data)
      @logger = Utils::ApplicationLogger.instance
      @data=ex_data
      @index=ex_index
      @id = @data["@id"]
      @custom=@data["@custom"]
      @text_lines=Hash.new
      load_text_lines()
      load_contour()
    end

    def self.blank
      return Text_Region.new(0,Text_Region.blank_data)
    end

  def size
      return @text_lines.size
    end

    def id= (ex_id)
      raise(ArgumentError, "Got passed a non string object") if ex_id.class != String
      @id=ex_id
    end

    def index= (ex_index)
      raise(ArgumentError, "Got passed a negative value to update the index") if ex_index.to_i < 0
      @index=ex_index.to_i
    end

    def [](ex_key)
      raise(RangeError, "Index #{ex_key} is out of range") unless @text_lines.has_key? ex_key
      return @text_lines[ex_key]
    end

    def has_line? line_id
      return @text_lines.has_key? line_id
    end

    def delete(ex_line_id)
      if has_line? ex_line_id
        @logger.info("Deleting text region #{ex_line_id}")
        @text_lines.delete(ex_line_id)
        review_lines_index
      else
        raise(ArgumentError, "Line id #{ex_line_id} does not exist so it can not be deleted")
      end
    end

    def clear_text_lines()
      @text_lines.clear
    end

    def push(ex_line)
      raise(ArgumentError, "Got passed a non text line object") if ex_line.class != RubyPager::Text_Line
      raise(ArgumentError, "Text line id already in use") if @text_lines.has_key? ex_line.id
      ex_line.index=@text_lines.size
      @text_lines[ex_line.id]=ex_line

    end

    def get_consolidated_data
      consolidate_data()
      return @data
    end

    def self.blank_data
      res=Hash.new
      res["@id"]=""
      res["@custom"]=""
      res["TextLine"]=Array.new
      res["Coords"]=Hash.new
      res["Coords"]["@points"]=Coords.blank_data
      return res
    end

    def baseline_vertical_noise(ex_std_dev)
      @text_lines.values.each {|text_line| text_line.baseline_vertical_noise(ex_std_dev) }
    end

    private

    def load_text_lines()
      if @data["TextLine"]
        if @data["TextLine"].class == Array
          line_array=@data["TextLine"]
          line_array.each_with_index {|text_line,index |
            @text_lines[text_line["@id"]]=Text_Line.new(index,text_line)
          }
        end

        if @data["TextLine"].class == Hash
          text_line=@data["TextLine"]
          @text_lines[text_line["@id"]]=Text_Line.new(0,text_line)
        end
      end
    end

    def load_contour()
      @contour = Coords.new(@data["Coords"]["@points"]);
    end

    def consolidate_data
      @data["@custom"]=@custom
      @data["@id"]=@id
      @data["Coords"]["@points"]=@contour.get_consolidated_data
      @data["TextLine"].clear if @data["TextLine"] and @data["TextLine"].class == Array
      if@text_lines.length>1
        @text_lines.values.each {|text_line|
         @data["TextLine"].push(text_line.get_consolidated_data)
        }
      end
      @data["TextLine"]=@text_lines.values[0].get_consolidated_data if@text_lines.length==1
    end

    def review_lines_index
      index =0
      @text_lines.values.each {|line|
        line.index=index
        index+=1
      }
    end

  end

end