# frozen_string_literal: true

RSpec.describe GameOfLife do
  describe ".generate" do
    let(:options) do
      {
        "live-cell" => "L",
        "dead-cell" => "D",
        "delay" => 100,
        "width" => 10,
        "height" => 20,
        "seed" => 500,
      }
    end

    context "with options['input']" do
      before { options["input"] = "./file.txt" }

      it "defines configurations constants" do
        expect(described_class::Cell).to receive(:const_set).with(:LIVE_CELL, "L")
        expect(described_class::Cell).to receive(:const_set).with(:DEAD_CELL, "D")
        expect(described_class).to receive(:const_set).with(:DELAY, 100.0)
        expect(described_class).to receive(:const_set).with(:BANNER, "Input: ./file.txt")

        allow(described_class::Generators::Input).to receive(:new)
        described_class.generate(options)
      end

      it "calls Generators::Input.new" do
        allow(described_class::Cell).to receive(:const_set)
        allow(described_class).to receive(:const_set)

        expect(described_class::Generators::Input).to receive(:new).with(options)
        described_class.generate(options)
      end
    end

    context "without options['input']" do
      before { options["seed"] = 1337 }

      it "defines configurations constants" do
        expect(described_class::Cell).to receive(:const_set).with(:LIVE_CELL, "L")
        expect(described_class::Cell).to receive(:const_set).with(:DEAD_CELL, "D")
        expect(described_class).to receive(:const_set).with(:DELAY, 100.0)
        expect(described_class).to receive(:const_set).with(:BANNER, "Seed: 1337")

        allow(described_class::Generators::Seed).to receive(:new)
        described_class.generate(options)
      end

      it "calls Generators::Seed.new (and raises error)" do
        allow(described_class::Cell).to receive(:const_set)
        allow(described_class).to receive(:const_set)

        expect { described_class.generate(options) }.to raise_error(NotImplementedError)
      end
    end
  end

  describe ".run" do
    let(:universe) { GameOfLife::Universe.new(width: 3, height: 3) }

    it "calls universe#evolve! and #{described_class}.run" do
      # allow kernel loop tiwce
      allow(Kernel).to receive(:loop).and_yield.and_yield

      expect(described_class).to receive(:render).with(universe).twice
      expect(universe).to receive(:evolve!).twice

      described_class.run(universe)
    end
  end

  describe.pending ".render"
end