require 'db/mongo/models/user'

RSpec.describe Devops::Model::User, type: :model do
  let(:user) { build(:user) }

  it 'is valid with correct attrs' do
    expect(user).to be_valid
  end

  describe 'validation' do
    include_examples 'field type validation', :id, :not_nil, :non_empty_string, :only_word_symbols, :field_validator
    include_examples 'field type validation', :password, :not_nil, :maybe_empty_string, :field_validator
    include_examples 'field type validation', :email, :not_nil, :maybe_empty_string, :field_validator

    it "privileges is set to default value if nil is passed" do
      expect(user.privileges).not_to be nil
    end

    it 'privileges should be a hash' do
      expect(build(:user, privileges: 'root')).not_to be_valid
    end
  end

  it '#to_hash_without_id returns email, password and privileges' do
    expect(user.to_hash_without_id.keys).to match_array(%w(email password privileges))
  end

  describe '#privileges' do
    subject {user.privileges}
    it { should be_a(Hash) }

    it 'has entity types as keys' do
      expect(subject.keys).to match_array(Devops::Model::User::KNOWN_ENTITIES)
    end
  end

  describe '#all_privileges' do
    it 'all privileges are set to rwx' do
      expect(user.all_privileges.values.uniq).to eq ['rwx']
    end
  end

  describe '#default_privileges' do
    it 'user privilege is empty' do
      expect(user.default_privileges['user']).to be_empty
    end

    it 'others are r' do
      result = user.default_privileges
      result.delete('user')
      expect(result.values.uniq).to eq ['r']
    end
  end

  describe '#grant' do
    it 'sets privilege' do
      expect {
        user.grant('key', 'rw')
      }.to change{ user.privileges['key'] }.from('r').to('rw')
    end
    it 'could not be applied to root' do
      root = build(:user, id: 'root')
      expect{root.grant('user', 'r')}.to raise_error(InvalidPrivileges)
    end

    it 'recognize all value of entity' do
      user.grant('all', 'rw')
      expect(user.privileges.values.uniq).to eq ['rw']
    end

    it 'sets default privileges if cmd is empty' do
      user.grant('user', 'rw')
      user.grant('', 'rwx')
      expect(user.privileges).to eq user.default_privileges
    end

    it 'could not be applied with unknown privilege value' do
      expect{user.grant('user', 'q')}.to raise_error(InvalidCommand)
    end
  end

  describe '#check_privileges' do
    it "raises InvalidPrivileges if user hasn't specified privilege" do
      expect { user.check_privileges('key', 'w') }.to raise_error(InvalidPrivileges)
    end

    it 'does nothing is user has specified privilege' do
      user.check_privileges('key', 'r')
    end
  end

  describe '.create_root' do
    subject {Devops::Model::User.create_root}
    it { should be_valid }
    it 'his name is root' do
      expect(subject.id).to eq Devops::Model::User::ROOT_USER_NAME
    end

    it 'his password is root password' do
      expect(subject.password).to eq Devops::Model::User::ROOT_PASSWORD
    end

    it 'has all privileges' do
      expect(subject.privileges).to eq user.all_privileges
    end
  end
end