require 'spec_helper'

describe MB::Plugin do
  let(:metadata) do
    MB::CookbookMetadata.new do
      name             "motherbrain"
      maintainer       "Jamie Winsor"
      maintainer_email "jamie@vialstudios.com"
      license          "Apache 2.0"
      description      "Installs/Configures motherbrain"
      long_description "Installs/Configures motherbrain"
      version          "0.1.0"
    end
  end

  describe "ClassMethods" do
    subject { MB::Plugin }

    describe "::load" do
      subject(:plugin) do
        described_class.load(metadata) do
          # blank plugin
        end
      end

      its(:name) { should eql('motherbrain') }
      its(:maintainer) { should eql('Jamie Winsor') }
      its(:maintainer_email) { should eql('jamie@vialstudios.com') }
      its(:license) { should eql('Apache 2.0') }
      its(:description) { should eql('Installs/Configures motherbrain') }
      its(:long_description) { should eql('Installs/Configures motherbrain') }
      its(:version) { subject.to_s.should eql('motherbrain (0.1.0)') }
      its(:components) { should be_empty }
      its(:commands) { should be_empty }
      its(:bootstrap_routine) { should be_nil }

      context "when a stack_order block is present" do
        subject do
          described_class.load(metadata) do
            stack_order do
              # empty routine
            end
          end
        end

        it "has a Bootstrap::Routine for the value of bootstrap_routine" do
          subject.bootstrap_routine.should be_a(MB::Bootstrap::Routine)
        end
      end

      context "when a command keyword is present" do
        subject do
          described_class.load(metadata) do
            command "start" do
              description "Start all services"

              execute do
                component("activemq").invoke("start")
              end
            end
          end
        end

        it { subject.commands.should have(1).item }
        it { subject.command("start").should_not be_nil }
      end

      context "when a component keyword is present" do
        subject do
          described_class.load(metadata) do
            component "activemq" do
              description "do stuff to AMQ"
            end
          end
        end

        it { subject.components.should have(1).item }
        it { subject.component("activemq").should_not be_nil }
      end

      context "when the metadata contains invalid values for attributes" do
        let(:metadata) do
          MB::CookbookMetadata.new do
            name 1
          end
        end

        it { -> { plugin }.should raise_error MB::InvalidCookbookMetadata }
      end

      context "when the plugin contains an unknown keyword" do
        subject(:plugin) do
          described_class.load(metadata) do
            unknown_keyword
          end
        end

        it { -> { plugin }.should raise_error MB::PluginSyntaxError }
      end
    end

    describe "#from_path" do
      let(:cb_path) { fixtures_path.join('myface-0.1.0') }

      subject { described_class.from_path(cb_path) }

      it "returns a MB::Plugin from the given directory" do
        subject.should be_a(MB::Plugin)
      end
    end
  end

  subject { described_class.new(metadata) }

  describe "#to_s" do
    it "returns the name and version of the plugin" do
      subject.to_s.should eql("motherbrain (0.1.0)")
    end
  end

  describe "comparing plugins" do
    let(:one) do
      metadata = MB::CookbookMetadata.new do
        name 'apple'
        version '1.0.0'
      end
      described_class.new(metadata)
    end
    let(:two) do
      metadata = MB::CookbookMetadata.new do
        name 'apple'
        version '2.0.0'
      end
      described_class.new(metadata)
    end
    let(:three) do
      metadata = MB::CookbookMetadata.new do
        name 'cherry'
        version '1.0.0'
      end
      described_class.new(metadata)
    end
    let(:four) do
      metadata = MB::CookbookMetadata.new do
        name 'cherry'
        version '2.0.0'
      end
      described_class.new(metadata)
    end
    let(:five) do
      metadata = MB::CookbookMetadata.new do
        name 'orange'
        version '1.0.0'
      end
      described_class.new(metadata)
    end
    let(:six) do
      metadata = MB::CookbookMetadata.new do
        name 'orange'
        version '2.0.0'
      end
      described_class.new(metadata)
    end

    let(:list) do
      [
        one,
        two,
        three,
        four,
        five,
        six
      ]
    end

    it "returns the list in the proper order" do
      list.shuffle.sort.should eql(list)
    end
  end

  describe "#to_hash" do
    subject do
      described_class.new(metadata).to_hash
    end

    it "includes a 'name' field and value" do
      subject[:name].should_not be_nil
    end

    it "includes a 'version' field and value" do
      subject[:version].should_not be_nil
    end

    it "includes a 'description' field and value" do
      subject[:description].should_not be_nil
    end

    it "includes a 'long_description' field and value" do
      subject[:long_description].should_not be_nil
    end

    it "includes a 'maintainer' field and value" do
      subject[:maintainer].should_not be_nil
    end

    it "includes a 'maintainer_email' field and value" do
      subject[:maintainer_email].should_not be_nil
    end
  end

  describe "#command" do
    let(:plugin) do
      described_class.new(metadata) do
        command "existing" do
          # block
        end
      end
    end

    subject { plugin.command(name) }

    context "when the component has a command matching the given name" do
      let(:name) { "existing" }

      it { should be_a(MB::Command) }
      it { name.should eql("existing") }
    end

    context "when the component does not have a command matching the given name" do
      let(:name) { "not-there" }

      it { should be_nil }
    end
  end

  describe "#command!" do
    before do
      subject.stub(command: nil)
    end

    it "raises a CommandNotFound error when no matching command is present" do
      expect {
        subject.command!("stop")
      }.to raise_error(MB::CommandNotFound)
    end
  end
end