# frozen_string_literal: true

require "guard/cli/environments/valid"
require "guard/cli/environments/bundler"

RSpec.describe Guard::Cli::Environments::Valid do
  subject { described_class.new(options) }
  let(:options) { double("options") }

  before do
    # TODO: start should be an instance method of something
    allow(Guard).to receive(:start)
  end

  describe "#start_guard" do
    let(:bundler) { instance_double("Guard::Cli::Environments::Bundler") }

    before do
      allow(Guard::Cli::Environments::Bundler).to receive(:new)
        .and_return(bundler)

      allow(bundler).to receive(:verify)
    end

    context "with a valid bundler setup" do
      before do
        allow(bundler).to receive(:verify)

        allow(options).to receive(:[]).with(:no_bundler_warning)
                                      .and_return(false)
      end

      it "starts guard" do
        expect(Guard).to receive(:start)
        subject.start_guard
      end

      it "start guard with options" do
        expect(Guard).to receive(:start).with(options)
        subject.start_guard
      end

      it "returns exit code" do
        exitcode = double("exitcode")
        expect(Guard).to receive(:start).and_return(exitcode)
        expect(subject.start_guard).to be(exitcode)
      end

      [
        Guard::Dsl::Error,
        Guard::Guardfile::Evaluator::NoPluginsError,
        Guard::Guardfile::Evaluator::NoGuardfileError,
        Guard::Guardfile::Evaluator::NoCustomGuardfile
      ].each do |error_class|
        context "when a #{error_class} error occurs" do
          before do
            allow(Guard).to receive(:start)
              .and_raise(error_class, "#{error_class} error!")
          end

          it "aborts" do
            expect { subject.start_guard }.to raise_error(SystemExit)
          end

          it "shows error message" do
            expect(Guard::UI).to receive(:error).with(/#{error_class} error!/)
            begin
              subject.start_guard
            rescue SystemExit
            end
          end
        end
      end
    end

    context "without no_bundler_warning option" do
      subject { described_class.new(no_bundler_warning: false) }

      it "verifies bundler presence" do
        expect(bundler).to receive(:verify)
        subject.start_guard
      end

      context "without a valid bundler setup" do
        before do
          allow(bundler).to receive(:verify).and_raise(SystemExit)
        end

        it "does not start guard" do
          expect(Guard).to_not receive(:start)

          begin
            subject.start_guard
          rescue SystemExit
          end
        end
      end
    end

    context "with no_bundler_warning option" do
      subject { described_class.new(no_bundler_warning: true) }

      it "does not verify bundler presence" do
        expect(bundler).to_not receive(:verify)
        subject.start_guard
      end

      it "starts guard" do
        expect(Guard).to receive(:start)
        subject.start_guard
      end
    end

    describe "return value" do
      let(:exitcode) { double("Fixnum") }
      subject { described_class.new(no_bundler_warning: true) }

      before do
        allow(Guard).to receive(:start).and_return(exitcode)
      end

      it "matches return value of Guard.start" do
        expect(subject.start_guard).to be(exitcode)
      end
    end
  end

  describe "#initialize_guardfile" do
    let(:evaluator) { instance_double("Guard::Guardfile::Evaluator") }
    let(:generator) { instance_double("Guard::Guardfile::Generator") }
    let(:state) { instance_double("Guard::Internals::State") }
    let(:session) { instance_double("Guard::Internals::Session") }

    before do
      stub_file("Gemfile")

      allow(evaluator).to receive(:evaluate)
      allow(generator).to receive(:create_guardfile)
      allow(generator).to receive(:initialize_all_templates)

      allow(session).to receive(:evaluator_options)
      allow(state).to receive(:session).and_return(session)

      allow(Guard::Internals::State).to receive(:new).and_return(state)
      allow(Guard::Guardfile::Evaluator).to receive(:new).and_return(evaluator)
      allow(Guard::Guardfile::Generator).to receive(:new).and_return(generator)
    end

    context "with bare option" do
      before do
        expect(options).to receive(:[]).with(:bare).and_return(true)
      end

      it "Only creates the Guardfile without initializing any Guard template" do
        allow(evaluator).to receive(:evaluate)
          .and_raise(Guard::Guardfile::Evaluator::NoGuardfileError)

        allow(File).to receive(:exist?).with("Gemfile").and_return(false)
        expect(generator).to receive(:create_guardfile)
        expect(generator).to_not receive(:initialize_template)
        expect(generator).to_not receive(:initialize_all_templates)

        subject.initialize_guardfile
      end

      it "returns an exit code" do
        # TODO: ideally, we'd capture known exceptions and return nonzero
        expect(subject.initialize_guardfile).to be_zero
      end
    end

    context "with no bare option" do
      before do
        expect(options).to receive(:[]).with(:bare).and_return(false)
      end

      it "evaluates created or existing guardfile" do
        expect(evaluator).to receive(:evaluate)
        subject.initialize_guardfile
      end

      it "creates a Guardfile" do
        expect(evaluator).to receive(:evaluate)
          .and_raise(Guard::Guardfile::Evaluator::NoGuardfileError).once
        expect(evaluator).to receive(:evaluate)

        expect(Guard::Guardfile::Generator).to receive(:new)
          .and_return(generator)
        expect(generator).to receive(:create_guardfile)

        subject.initialize_guardfile
      end

      it "initializes templates of all installed Guards" do
        allow(File).to receive(:exist?).with("Gemfile").and_return(false)

        expect(generator).to receive(:initialize_all_templates)

        subject.initialize_guardfile
      end

      it "initializes each passed template" do
        allow(File).to receive(:exist?).with("Gemfile").and_return(false)

        expect(generator).to receive(:initialize_template).with("rspec")
        expect(generator).to receive(:initialize_template).with("pow")

        subject.initialize_guardfile(%w[rspec pow])
      end

      context "when passed a guard name" do
        context "when the Guardfile is empty" do
          before do
            allow(evaluator).to receive(:evaluate)
              .and_raise Guard::Guardfile::Evaluator::NoPluginsError
            allow(generator).to receive(:initialize_template)
          end

          it "works without without errors" do
            expect(subject.initialize_guardfile(%w[rspec])).to be_zero
          end

          it "adds the template" do
            expect(generator).to receive(:initialize_template).with("rspec")
            subject.initialize_guardfile(%w[rspec])
          end
        end

        it "initializes the template of the passed Guard" do
          expect(generator).to receive(:initialize_template).with("rspec")
          subject.initialize_guardfile(%w[rspec])
        end
      end

      it "returns an exit code" do
        expect(subject.initialize_guardfile).to be_zero
      end

      context "when passed an unknown guard name" do
        before do
          expect(generator).to receive(:initialize_template).with("foo")
                                                            .and_raise(Guard::Guardfile::Generator::NoSuchPlugin, "foo")
        end

        it "returns an exit code" do
          expect(::Guard::UI).to receive(:error).with(
            "Could not load 'guard/foo' or '~/.guard/templates/foo'"\
            " or find class Guard::Foo\n"
          )
          expect(subject.initialize_guardfile(%w[foo])).to be(1)
        end
      end
    end
  end
end