require 'test_helper'

module Vedeu
  describe Geometry do
    describe '#initialize' do
      it 'returns an instance of itself' do
        attributes = {}
        Geometry.new(attributes).must_be_instance_of(Geometry)
      end
    end

    describe '#y' do
      it 'returns the value of y when it is a proc' do
        IO.console.stub(:winsize, [25, 80]) do
          geometry = Geometry.new({ y: proc { 17 } })
          geometry.y.must_equal(17)
        end
      end
    end

    describe '#x' do
      it 'returns the value of x when it is a proc' do
        IO.console.stub(:winsize, [25, 80]) do
          geometry = Geometry.new({ x: proc { 58 } })
          geometry.x.must_equal(58)
        end
      end
    end

    describe '#width' do
      it 'returns the viewport width when the interface fits the terminal' do
        IO.console.stub(:winsize, [25, 80]) do
          geometry = Geometry.new({ width: 60, height: 1, x: 5, y: 1 })
          geometry.width.must_equal(60)
        end
      end

      it 'returns the viewport width when the interface does not fit the ' \
         'terminal' do
        IO.console.stub(:winsize, [25, 60]) do
          geometry = Geometry.new({ width: 60, height: 1, x: 5, y: 1 })
          geometry.width.must_equal(55)
        end
      end

      it 'returns an unusable viewport width when the terminal is tiny' do
        IO.console.stub(:winsize, [25, -10]) do
          geometry = Geometry.new({ width: 60, height: 1, x: 5, y: 1 })
          geometry.width.must_equal(1)
        end
      end
    end

    describe '#height' do
      it 'returns the viewport height when the interface fits the terminal' do
        IO.console.stub(:winsize, [25, 80]) do
          geometry = Geometry.new({ width: 5, height: 20, x: 1, y: 5 })
          geometry.height.must_equal(20)
        end
      end

      it 'returns the viewport height when the interface does not fit the ' \
         'terminal' do
        IO.console.stub(:winsize, [15, 80]) do
          geometry = Geometry.new({ width: 5, height: 20, x: 1, y: 5 })
          geometry.height.must_equal(10)
        end
      end

      it 'returns an unusable viewport height when the terminal is tiny' do
        IO.console.stub(:winsize, [-10, 80]) do
          geometry = Geometry.new({ width: 60, height: 20, x: 1, y: 5 })
          geometry.height.must_equal(1)
        end
      end
    end

    describe '#origin' do
      it 'returns the origin for the interface' do
        geometry = Geometry.new({ width: 5, height: 5 })
        geometry.origin.must_equal("\e[1;1H")
      end

      it 'returns the origin for the interface' do
        console = IO.console
        console.stub :winsize, [25, 80] do
          geometry = Geometry.new({ width: 5, height: 5, centred: true })
          geometry.origin.must_equal("\e[10;38H")
        end
      end

      it 'returns the line position relative to the origin' do
        geometry = Geometry.new({ width: 5, height: 5 })
        geometry.origin(3).must_equal("\e[4;1H")
      end

      it 'returns the origin for the interface when the interface' \
         ' is at a custom position' do
        geometry = Geometry.new({ width: 5, height: 5, x: 3, y: 6 })
        geometry.origin.must_equal("\e[6;3H")
      end

      it 'returns the line position relative to the origin when the' \
         ' interface is at a custom position' do
        geometry = Geometry.new({ width: 5, height: 5, x: 3, y: 6 })
        geometry.origin(3).must_equal("\e[9;3H")
      end
    end

    describe '#top' do
      it 'centred is true' do
        console = IO.console
        console.stub :winsize, [12, 80] do
          geometry = Geometry.new({ height: 6, width: 18, centred: true })
          geometry.top.must_equal(3)
        end
      end

      it 'centred is false' do
        geometry = Geometry.new({ height: 6, width: 18 })
        geometry.top.must_equal(1)
      end

      it 'centred is false and y is set' do
        geometry = Geometry.new({ height: 6, width: 18, y: 4 })
        geometry.top.must_equal(4)
      end
    end

    describe '#north' do
      it 'returns the top minus the value when the value is provided' do
        geometry = Geometry.new({ height: 6, width: 18, y: 4 })
        geometry.north(2).must_equal(2)
      end

      it 'returns the top minus 1 without a value' do
        geometry = Geometry.new({ height: 6, width: 18, y: 4 })
        geometry.north.must_equal(3)
      end
    end

    describe '#left' do
      it 'centred is true' do
        console = IO.console
        console.stub :winsize, [25, 40] do
          geometry = Geometry.new({ height: 6, width: 18, centred: true })
          geometry.left.must_equal(11)
        end
      end

      it 'centred is false' do
        geometry = Geometry.new({ height: 6, width: 18 })
        geometry.left.must_equal(1)
      end

      it 'centred is false and x is set' do
        geometry = Geometry.new({ height: 6, width: 18, x: 5 })
        geometry.left.must_equal(5)
      end
    end

    describe '#west' do
      it 'returns the left minus the value when the value is provided' do
        geometry = Geometry.new({ height: 6, width: 18, x: 7 })
        geometry.west(2).must_equal(5)
      end

      it 'returns the left minus 1 without a value' do
        geometry = Geometry.new({ height: 6, width: 18, x: 7 })
        geometry.west.must_equal(6)
      end
    end

    describe '#bottom' do
      it 'centred is true' do
        console = IO.console
        console.stub :winsize, [20, 40] do
          geometry = Geometry.new({ height: 6, width: 18, centred: true })
          geometry.bottom.must_equal(13)
        end
      end

      it 'centred is false' do
        geometry = Geometry.new({ height: 6, width: 18 })
        geometry.bottom.must_equal(7)
      end

      it 'centred is false and y is set' do
        geometry = Geometry.new({ height: 6, width: 18, y: 5 })
        geometry.bottom.must_equal(11)
      end
    end

    describe '#south' do
      it 'returns the bottom plus the value when the value is provided' do
        geometry = Geometry.new({ height: 6, width: 18, y: 3 })
        geometry.south(2).must_equal(11)
      end

      it 'returns the bottom plus 1 without a value' do
        geometry = Geometry.new({ height: 6, width: 18, y: 3 })
        geometry.south.must_equal(10)
      end
    end

    describe '#right' do
      it 'centred is true' do
        console = IO.console
        console.stub :winsize, [25, 40] do
          geometry = Geometry.new({ height: 6, width: 18, centred: true })
          geometry.right.must_equal(29)
        end
      end

      it 'centred is false' do
        geometry = Geometry.new({ height: 6, width: 18 })
        geometry.right.must_equal(19)
      end

      it 'centred is false and x is set' do
        geometry = Geometry.new({ height: 6, width: 18, x: 5 })
        geometry.right.must_equal(23)
      end
    end

    describe '#east' do
      it 'returns the right plus the value when the value is provided' do
        geometry = Geometry.new({ height: 6, width: 18, x: 7 })
        geometry.east(2).must_equal(27)
      end

      it 'returns the right plus 1 without a value' do
        geometry = Geometry.new({ height: 6, width: 18, x: 7 })
        geometry.east.must_equal(26)
      end
    end

    describe '#virtual_y' do
      it 'returns the virtual y positions within the interfaces dimensions' do
        geometry = Geometry.new({ height: 6, width: 6, x: 7, y: 5 })
        geometry.virtual_y.must_equal([5, 6, 7, 8, 9, 10])
      end
    end

    describe '#virtual_x' do
      it 'returns the virtual x positions within the interfaces dimensions' do
        geometry = Geometry.new({ height: 6, width: 6, x: 7, y: 5 })
        geometry.virtual_x.must_equal([7, 8, 9, 10, 11, 12])
      end
    end

    describe '#to_h' do
      it 'returns all the values within the instance as a hash' do
        geometry = Geometry.new({ height: 6, width: 6, x: 3, y: 3 })
        geometry.to_h.must_equal(
          {
            centred:         false,
            height:          6,
            width:           6,
            x:               3,
            y:               3,
            top:             3,
            right:           9,
            bottom:          9,
            left:            3,
            north:           2,
            east:            10,
            south:           10,
            west:            2,
            virtual_x:       [3, 4, 5, 6, 7, 8],
            virtual_y:       [3, 4, 5, 6, 7, 8]
          }
        )
      end
    end
  end
end