# frozen_string_literal: true

require "guard"

RSpec.describe Guard do
  # Initialize before Guard::Interactor const is stubbed
  let!(:interactor) { instance_double("Guard::Interactor") }

  let(:guardfile) { File.expand_path("Guardfile") }
  let(:traps) { Guard::Internals::Traps }

  let(:evaluator) { instance_double("Guard::Guardfile::Evaluator") }

  let(:plugins) { instance_double("Guard::Internals::Plugins") }
  let(:scope) { instance_double("Guard::Internals::Scope") }
  let(:session) { instance_double("Guard::Internals::Session") }
  let(:state) { instance_double("Guard::Internals::State") }
  let(:queue) { instance_double("Guard::Internals::Queue") }

  before do
    allow(Guard::Interactor).to receive(:new).and_return(interactor)
    allow(Guard::Guardfile::Evaluator).to receive(:new).and_return(evaluator)

    allow(session).to receive(:debug?).and_return(false)
    allow(session).to receive(:plugins).and_return(plugins)
    allow(state).to receive(:session).and_return(session)
    allow(Guard::Internals::Session).to receive(:new).and_return(session)
    allow(Guard::Internals::Scope).to receive(:new).and_return(scope)
    allow(Guard::Internals::Queue).to receive(:new).and_return(queue)
  end

  # TODO: setup has too many responsibilities
  describe ".setup" do
    subject { Guard.setup(options) }

    let(:options) { { my_opts: true, guardfile: guardfile } }

    let(:listener) { instance_double("Listen::Listener") }

    before do
      allow(Listen).to receive(:to).with(Dir.pwd, {}) { listener }

      stub_guardfile(" ")
      stub_user_guard_rb

      g1 = instance_double("Guard::Group", name: :common, options: {})
      g2 = instance_double("Guard::Group", name: :default, options: {})
      allow(Guard::Group).to receive(:new).with(:common).and_return(g1)
      allow(Guard::Group).to receive(:new).with(:default).and_return(g2)

      allow(evaluator).to receive(:inline?).and_return(false)
      allow(evaluator).to receive(:custom?).and_return(false)
      allow(evaluator).to receive(:evaluate)
      allow(Guard::Guardfile::Evaluator).to receive(:new).and_return(evaluator)

      allow(Guard::Notifier).to receive(:connect)

      allow(Guard::UI).to receive(:reset_and_clear)
      allow(plugins).to receive(:all).and_return([])

      allow(session).to receive(:listener_args).and_return([:to, Dir.pwd, {}])
      allow(session).to receive(:evaluator_options).and_return({})
      allow(session).to receive(:cmdline_groups).and_return({})
      allow(session).to receive(:cmdline_plugins).and_return({})
      allow(session).to receive(:notify_options).and_return(notify: true)
      allow(session).to receive(:interactor_name).and_return(:foo)
      allow(session).to receive(:guardfile_ignore).and_return([])
      allow(session).to receive(:guardfile_ignore_bang).and_return([])

      allow(listener).to receive(:ignore)
      allow(listener).to receive(:ignore!)

      allow(Guard::Internals::State).to receive(:new).and_return(state)
    end

    it "returns itself for chaining" do
      expect(subject).to be Guard
    end

    it "initializes the listener" do
      allow(Listen).to receive(:to)
        .with("/foo", { latency: 2, wait_for_delay: 1 }).and_return(listener)

      allow(session).to receive(:listener_args).and_return(
        [:to, "/foo", { latency: 2, wait_for_delay: 1 }]
      )
      subject
    end

    it "initializes the interactor" do
      expect(Guard::Interactor).to receive(:new).with(false)
      subject
    end

    context "trapping signals" do
      before do
        allow(traps).to receive(:handle)
      end

      it "sets up USR1 trap for pausing" do
        expect(traps).to receive(:handle).with("USR1") { |_, &b| b.call }
        expect(Guard).to receive(:async_queue_add)
          .with(%i[guard_pause paused])
        subject
      end

      it "sets up USR2 trap for unpausing" do
        expect(traps).to receive(:handle).with("USR2") { |_, &b| b.call }
        expect(Guard).to receive(:async_queue_add)
          .with(%i[guard_pause unpaused])
        subject
      end

      it "sets up INT trap for cancelling or quitting interactor" do
        expect(traps).to receive(:handle).with("INT") { |_, &b| b.call }
        expect(interactor).to receive(:handle_interrupt)
        subject
      end
    end

    it "evaluates the Guardfile" do
      expect(evaluator).to receive(:evaluate)
      allow(Guard::Guardfile::Evaluator).to receive(:new).and_return(evaluator)

      subject
    end

    describe "listener" do
      subject { listener }

      context "with ignores 'ignore(/foo/)' and 'ignore!(/bar/)'" do
        before do
          allow(evaluator).to receive(:evaluate) do
            allow(session).to receive(:guardfile_ignore).and_return([/foo/])
            allow(session).to receive(:guardfile_ignore_bang)
              .and_return([/bar/])
          end
          Guard.setup(options)
        end

        it { is_expected.to have_received(:ignore).with([/foo/]) }
        it { is_expected.to have_received(:ignore!).with([/bar/]) }
      end

      context "without ignores" do
        before { Guard.setup(options) }
        it { is_expected.to_not have_received(:ignore) }
        it { is_expected.to_not have_received(:ignore!) }
      end
    end

    it "displays an error message when no guard are defined in Guardfile" do
      expect(Guard::UI).to receive(:error)
        .with("No plugins found in Guardfile, please add at least one.")

      subject
    end

    it "connects to the notifier" do
      expect(Guard::Notifier).to receive(:connect).with({ notify: true })
      subject
    end

    context "with the group option" do
      let(:options) { { group: %w[frontend backend] } }
      it "passes options to session" do
        expect(Guard::Internals::State).to receive(:new).with(options)
        subject
      end
    end

    context "with the plugin option" do
      let(:options) { { plugin: %w[cucumber jasmine] } }
      it "passes options to session" do
        expect(Guard::Internals::State).to receive(:new).with(options)
        subject
      end
    end

    describe ".interactor" do
      subject { Guard::Interactor }

      before do
        expect(session).to receive(:interactor_name).and_return(type)
        Guard.setup(options)
      end

      context "with interactions enabled" do
        let(:type) { :pry_wrapper }
        let(:options) { { no_interactions: false } }
        it { is_expected.to have_received(:new).with(false) }
      end

      context "with interactions disabled" do
        let(:type) { :sleep }
        let(:options) { { no_interactions: true } }
        it { is_expected.to have_received(:new).with(true) }
      end
    end

    describe "UI" do
      subject { Guard::UI }

      context "when clearing is configured" do
        before { Guard.setup(options) }
        it { is_expected.to have_received(:reset_and_clear) }
      end
    end
  end

  describe "._relative_pathname" do
    subject { Guard.send(:_relative_pathname, raw_path) }

    let(:pwd) { Pathname("/project") }

    before { allow(Pathname).to receive(:pwd).and_return(pwd) }

    context "with file in project directory" do
      let(:raw_path) { "/project/foo" }
      it { is_expected.to eq(Pathname("foo")) }
    end

    context "with file within project" do
      let(:raw_path) { "/project/spec/models/foo_spec.rb" }
      it { is_expected.to eq(Pathname("spec/models/foo_spec.rb")) }
    end

    context "with file in parent directory" do
      let(:raw_path) { "/foo" }
      it { is_expected.to eq(Pathname("../foo")) }
    end

    context "with file on another drive (e.g. Windows)" do
      let(:raw_path) { "d:/project/foo" }
      let(:pathname) { instance_double(Pathname) }

      before do
        allow_any_instance_of(Pathname).to receive(:relative_path_from)
          .with(pwd).and_raise(ArgumentError)
      end

      it { is_expected.to eq(Pathname.new("d:/project/foo")) }
    end
  end

  describe "#relevant_changes?" do
    pending
  end
end