# frozen_string_literal: true

require "guard/plugin"

require "guard/watcher"

RSpec.describe Guard::Plugin do
  let(:default) { instance_double("Guard::Group") }
  let(:test) { instance_double("Guard::Group") }

  let(:session) { instance_double("Guard::Internals::Session") }
  let(:groups) { instance_double("Guard::Internals::Groups") }
  let(:state) { instance_double("Guard::Internals::State") }

  before do
    allow(groups).to receive(:add).with(:default).and_return(default)
    allow(groups).to receive(:add).with(:test).and_return(test)

    allow(session).to receive(:groups).and_return(groups)
    allow(state).to receive(:session).and_return(session)
    allow(Guard).to receive(:state).and_return(state)
  end

  # TODO: this should already be done in spec_helper!
  after do
    klass = described_class
    klass.instance_variables.each do |var|
      klass.instance_variable_set(var, nil)
    end
  end

  describe "#initialize" do
    it "assigns the defined watchers" do
      watchers = [double("foo")]
      expect(Guard::Plugin.new(watchers: watchers).watchers).to eq watchers
    end

    it "assigns the defined options" do
      options = { a: 1, b: 2 }
      expect(Guard::Plugin.new(options).options).to eq options
    end

    context "with a group in the options" do
      it "assigns the given group" do
        expect(Guard::Plugin.new(group: :test).group).to eq test
      end
    end

    context "without a group in the options" do
      it "assigns a default group" do
        allow(groups).to receive(:add).with(:default).and_return(default)
        expect(Guard::Plugin.new.group).to eq default
      end
    end

    context "with a callback" do
      it "adds the callback" do
        block = instance_double(Proc)
        events = %i[start_begin start_end]
        callbacks = [{ events: events, listener: block }]
        Guard::Plugin.new(callbacks: callbacks)
        expect(Guard::Plugin.callbacks.first[0][0].callbacks).to eq(callbacks)
      end
    end
  end

  context "with a plugin instance" do
    subject do
      module Guard
        class DuMmy < Guard::Plugin
        end
      end
      Guard::DuMmy
    end

    after do
      Guard.send(:remove_const, :DuMmy)
    end

    describe ".non_namespaced_classname" do
      it "remove the Guard:: namespace" do
        expect(subject.non_namespaced_classname).to eq "DuMmy"
      end
    end

    describe ".non_namespaced_name" do
      it "remove the Guard:: namespace and downcase" do
        expect(subject.non_namespaced_name).to eq "dummy"
      end
    end

    describe ".template" do
      before do
        allow(File).to receive(:read)
      end

      it "reads the default template" do
        expect(File).to receive(:read)
          .with("/guard-dummy/lib/guard/dummy/templates/Guardfile") { true }

        subject.template("/guard-dummy")
      end
    end

    describe "#name" do
      it "outputs the short plugin name" do
        expect(subject.new.name).to eq "dummy"
      end
    end

    describe "#title" do
      it "outputs the plugin title" do
        expect(subject.new.title).to eq "DuMmy"
      end
    end

    describe "#to_s" do
      let(:default) { instance_double("Guard::Group", name: :default) }

      it "output the short plugin name" do
        expect(subject.new.to_s)
          .to match(/#<Guard::DuMmy @name=dummy .*>/)
      end
    end
  end

  let(:listener) { instance_double(Proc, call: nil) }

  describe ".add_callback" do
    let(:foo) { double("foo plugin") }

    it "can add a run_on_modifications callback" do
      described_class.add_callback(
        listener,
        foo,
        :run_on_modifications_begin
      )

      result = described_class.callbacks[[foo, :run_on_modifications_begin]]
      expect(result).to include(listener)
    end

    it "can add multiple callbacks" do
      described_class.add_callback(listener, foo, %i[event1 event2])

      result = described_class.callbacks[[foo, :event1]]
      expect(result).to include(listener)

      result = described_class.callbacks[[foo, :event2]]
      expect(result).to include(listener)
    end
  end

  describe ".notify" do
    let(:foo) { double("foo plugin") }
    let(:bar) { double("bar plugin") }

    before do
      described_class.add_callback(listener, foo, :start_begin)
    end

    it "sends :call to the given Guard class's start_begin callback" do
      expect(listener).to receive(:call).with(foo, :start_begin, "args")
      described_class.notify(foo, :start_begin, "args")
    end

    it "sends :call to the given Guard class's start_begin callback" do
      expect(listener).to receive(:call).with(foo, :start_begin, "args")
      described_class.notify(foo, :start_begin, "args")
    end

    it "runs only the given callbacks" do
      listener2 = double("listener2")
      described_class.add_callback(listener2, foo, :start_end)
      expect(listener2).to_not receive(:call).with(foo, :start_end)
      described_class.notify(foo, :start_begin)
    end

    it "runs callbacks only for the guard given" do
      described_class.add_callback(listener, bar, :start_begin)
      expect(listener).to_not receive(:call).with(bar, :start_begin)
      described_class.notify(foo, :start_begin)
    end
  end

  describe "#hook" do
    let(:foo) { double("foo plugin") }

    before do
      described_class.add_callback(listener, foo, :start_begin)
    end

    it "notifies the hooks" do
      class Foo < described_class
        def run_all
          hook :begin
          hook :end
        end
      end

      foo = Foo.new
      expect(described_class).to receive(:notify).with(foo, :run_all_begin)
      expect(described_class).to receive(:notify).with(foo, :run_all_end)
      foo.run_all
    end

    it "passes the hooks name" do
      class Foo < described_class
        def start
          hook "my_hook"
        end
      end

      foo = Foo.new
      expect(described_class).to receive(:notify).with(foo, :my_hook)
      foo.start
    end

    it "accepts extra arguments" do
      class Foo < described_class
        def stop
          hook :begin, "args"
          hook "special_sauce", "first_arg", "second_arg"
        end
      end
      foo = Foo.new

      expect(described_class).to receive(:notify)
        .with(foo, :stop_begin, "args")

      expect(described_class).to receive(:notify)
        .with(foo, :special_sauce, "first_arg", "second_arg")

      foo.stop
    end
  end
end