# Nathan Hinton 30 Dec 2025
# Test file for ships

require 'game/ship'

RSpec.describe Ship do
  let(:ship) {Ship.new('nathan', 0, 2, 4, 'Starlight')}
  describe '#initialize' do
    it 'Creates a ship with a player and a position' do
      expect(ship.owner).to eq 'nathan'
      expect(ship.position).to eq [0, 2, 4]
    end

    it 'Fails to create a ship when the name is invalid' do
      expect{Ship.new('nathan', 0, 2, 4, 'billy bob joe')}.to raise_error ShipError, "invalid ship name 'billy bob joe'"
    end

    it 'Fails when the player does not have the required tech' do
      nathan = instance_double('Player', researched_tech: ['Light Shield', 'Basic Engine'])
      expect{Ship.new(nathan, 0, 2, 4, 'Nebula Dominion')}.to raise_error ShipError, "Player needs the tech of 'Heavy Shield'"
    end

    it 'Fails when the player does not have the required buildings' do
      nathan = instance_double('Player', researched_tech: ['Heavy Shield', 'Large Engine', 'Laser Cannons', 'Neoplated Armor'], buildings: [])
      expect{Ship.new(nathan, 0, 2, 4, 'Nebula Dominion')}.to raise_error ShipError, "Player needs the building of 'Space Construction Station' to build this ship"
    end
  end

  describe '#teleport' do
    it 'Changes the coordinates of the ship immediately' do
      expect(ship.position).to eq [0, 2, 4]
      ship.teleport(4, 2, 0)
      expect(ship.position).to eq [4, 2, 0]
    end
  end

  describe '#move' do
    it 'Sets the target of the ship movement' do
      ship.move(1, 3, 5)
      expect(ship.instance_variable_get(:@target)).to eq [1, 3, 5]
    end
  end

  describe '#update' do
    it 'Does not move when target is eq to position' do
      expect{ship.update(1)}.to_not raise_error
      expect(ship.position).to eq [0, 2, 4]
    end

    describe 'Moves a single ship at the correct speed when target is different from position' do
      it 'in positive x' do
        ship.move(1, 2, 4)
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [1.0, 2.0, 4.0]
      end

      it 'in negative x' do
        ship.move(-1, 2, 4)
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [-1.0, 2.0, 4.0]
      end

      it 'in positive y' do
        ship.move(0, 3, 4)
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [0.0, 3.0, 4.0]
      end

      it 'in negative y' do
        ship.move(0, 1, 4)
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [0.0, 1.0, 4.0]
      end

      it 'in positive z' do
        ship.move(0, 2, 5)
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [0.0, 2.0, 5.0]
      end

      it 'in negative z' do
        ship.move(0, 2, 3)
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [0.0, 2.0, 3.0]
      end

      it 'in multiple dimensions' do
        ship.move(-1, 3, 3)
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [-0.5773502691896258, 2.5773502691896257, 3.4226497308103743]
        expect{ship.update(1)}.to_not raise_error
        expect(ship.position).to eq [-1, 3, 3]
      end

    end

    it 'Moves a group of ships at the slowest ship speed' do
    end
  end

  describe '#save_to_file' do
  end

  describe '#load_from_save' do
  end
end