require 'spec_helper'

describe Attachment::Pdf do
  use_model_class(:Thing,
                  :attachment_file_name => :string,
                  :attachment_width => :integer,
                  :attachment_height => :integer,
                  :attachment_aspect_ratio => :float,
                  :attachment_dimensions => :string)

  before do
    Thing.has_attachment :attachment do
      style :double, :size => '1224x1584'
      style :filled, :size => '500x500', :filled => true
      style :unfilled, :size => '1000x1000'
      default_style :double
    end
    @thing = Thing.new(:attachment => test_file)
  end

  def test_file
    path = "#{temporary_directory}/test.pdf"
    FileUtils.cp("#{ROOT}/spec/data/test.pdf", path)
    autoclose open(path)
  end

  def configure(&block)
    Thing.attachment_reflections[:attachment].configure(&block)
  end

  describe "#process" do
    it "should be processed with ImageMagick by default" do
      context = nil
      configure do
        style :output
        process :on => :event do
          context = self
        end
      end

      @thing.attachment.process(:event)
      context.should be_a(Processor::ImageMagick)
    end
  end

  describe "#dimensions" do
    it "should return 1x1 if the style is missing" do
      Thing.attachment_reflections[:attachment].configure do
        detect_type_by{:pdf}
      end
      @thing.save.should be_true
      File.unlink(@thing.attachment.path(:original))
      @thing = Thing.find(@thing.id)
      @thing.attachment.is_a?(Attachment::Pdf)  # sanity check
      @thing.attachment.stream.missing?         # sanity check
      @thing.attachment.dimensions(:original).should == [1, 1]
    end

    it "should return the width and height of the default style if no style name is given" do
      @thing.attachment.dimensions.should == [1224, 1584]
    end

    it "should return the width and height of the given style" do
      @thing.attachment.dimensions(:original).should == [612, 792]
      @thing.attachment.dimensions(:double).should == [1224, 1584]
    end

    it "should return the calculated width according to style filledness" do
      @thing.attachment.dimensions(:filled).should == [500, 500]
      @thing.attachment.dimensions(:unfilled).should == [773, 1000]
    end

    it "should only invoke identify once"
    it "should log the result"
  end

  describe "#width" do
    it "should return the width of the default style if no style name is given" do
      @thing.attachment.width.should == 1224
    end

    it "should return the width of the given style" do
      @thing.attachment.width(:original).should == 612
      @thing.attachment.width(:double).should == 1224
    end
  end

  describe "#height" do
    it "should return the height of the default style if no style name is given" do
      @thing.attachment.height.should == 1584
    end

    it "should return the height of the given style" do
      @thing.attachment.height(:original).should == 792
      @thing.attachment.height(:double).should == 1584
    end
  end

  describe "#aspect_ratio" do
    it "should return the aspect ratio of the default style if no style name is given" do
      @thing.attachment.aspect_ratio.should be_close(612.0/792, 1e-5)
    end

    it "should return the aspect ratio of the given style" do
      @thing.attachment.aspect_ratio(:original).should be_close(612.0/792, 1e-5)
      @thing.attachment.aspect_ratio(:filled).should be_close(1, 1e-5)
    end
  end

  describe "storable attributes" do
    it "should set the stored attributes on assignment" do
      @thing.attachment_width.should == 612
      @thing.attachment_height.should == 792
      @thing.attachment_aspect_ratio.should be_close(612.0/792, 1e-5)
      @thing.attachment_dimensions.should == '612x792'
    end

    describe "after roundtripping through the database" do
      before do
        @thing.save
        @thing = Thing.find(@thing.id)
      end

      it "should restore the stored attributes" do
        @thing.attachment_width.should == 612
        @thing.attachment_height.should == 792
        @thing.attachment_aspect_ratio.should be_close(612.0/792, 1e-5)
        @thing.attachment_dimensions.should == '612x792'
      end

      it "should recalculate the dimensions correctly" do
        @thing.attachment.dimensions(:filled).should == [500, 500]
        @thing.attachment.dimensions(:unfilled).should == [773, 1000]
      end
    end
  end
end