require 'helper'
require 'flipper/adapters/read_only'

RSpec.describe Flipper::Adapters::ReadOnly do
  let(:actor_class) { Struct.new(:flipper_id) }

  let(:adapter) { Flipper::Adapters::Memory.new }
  let(:flipper) { Flipper.new(subject) }
  let(:feature) { flipper[:stats] }

  let(:boolean_gate) { feature.gate(:boolean) }
  let(:group_gate)   { feature.gate(:group) }
  let(:actor_gate)   { feature.gate(:actor) }
  let(:actors_gate)  { feature.gate(:percentage_of_actors) }
  let(:time_gate)    { feature.gate(:percentage_of_time) }

  subject { described_class.new(adapter) }

  before do
    Flipper.register(:admins) { |actor|
      actor.respond_to?(:admin?) && actor.admin?
    }

    Flipper.register(:early_access) { |actor|
      actor.respond_to?(:early_access?) && actor.early_access?
    }
  end

  after do
    Flipper.unregister_groups
  end

  it "has name that is a symbol" do
    expect(subject.name).to_not be_nil
    expect(subject.name).to be_instance_of(Symbol)
  end

  it "has included the flipper adapter module" do
    expect(subject.class.ancestors).to include(Flipper::Adapter)
  end

  it "returns correct default values for the gates if none are enabled" do
    expect(subject.get(feature)).to eq({
      :boolean => nil,
      :groups => Set.new,
      :actors => Set.new,
      :percentage_of_actors => nil,
      :percentage_of_time => nil,
    })
  end

  it "can get feature" do
    actor_22 = actor_class.new('22')
    adapter.enable(feature, boolean_gate, flipper.boolean)
    adapter.enable(feature, group_gate, flipper.group(:admins))
    adapter.enable(feature, actor_gate, flipper.actor(actor_22))
    adapter.enable(feature, actors_gate, flipper.actors(25))
    adapter.enable(feature, time_gate, flipper.time(45))

    expect(subject.get(feature)).to eq({
      :boolean => "true",
      :groups => Set["admins"],
      :actors => Set["22"],
      :percentage_of_actors => "25",
      :percentage_of_time => "45",
    })
  end

  it "can get features" do
    expect(subject.features).to eq(Set.new)
    adapter.add(feature)
    expect(subject.features).to eq(Set["stats"])
  end

  it "raises error on add" do
    expect { subject.add(feature) }.to raise_error(Flipper::Adapters::ReadOnly::WriteAttempted)
  end

  it "raises error on remove" do
    expect { subject.remove(feature) }.to raise_error(Flipper::Adapters::ReadOnly::WriteAttempted)
  end

  it "raises on clear" do
    expect { subject.clear(feature) }.to raise_error(Flipper::Adapters::ReadOnly::WriteAttempted)
  end

  it "raises error on enable" do
    expect { subject.enable(feature, boolean_gate, flipper.boolean) }.to raise_error(Flipper::Adapters::ReadOnly::WriteAttempted)
  end

  it "raises error on disable" do
    expect { subject.disable(feature, boolean_gate, flipper.boolean) }.to raise_error(Flipper::Adapters::ReadOnly::WriteAttempted)
  end
end