# encoding: utf-8
require 'spec_helper'
require 'fedux_org_stdlib/app_config'

RSpec.describe AppConfig do

  context 'options' do
    it 'creates readers and writers' do
      with_environment 'HOME' => working_directory do
        config_klass = Class.new(AppConfig) do
          option :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to be_nil

        config.opt1 = 'blub'
        expect(config.opt1).to eq 'blub'
      end
    end

    it 'creates readers' do
      with_environment 'HOME' => working_directory do
        config_klass = Class.new(AppConfig) do
          option_reader :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to be_nil

        silence :stderr do
          expect {
            config.opt1 = 'blub'
          }.to raise_error NoMethodError
        end
      end
    end

    it 'checks for reserved key words' do
      with_environment 'HOME' => working_directory do
        expect do
          Class.new(AppConfig) do
            option_reader :_config_file, nil

            def _class_name
              'TestConfig'
            end

            def _module_name
              'MyApplication'
            end
          end
        end.to raise_error FeduxOrgStdlib::AppConfig::Exceptions::OptionNameForbidden
      end
    end
  end

  context '#lock' do
    it 'raises error if config is locked and one tries to modify a config option' do
      with_environment 'HOME' => working_directory do
        config_klass = Class.new(AppConfig) do
          option :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        config.lock
        expect { config.opt1 = 1 }.to raise_error FeduxOrgStdlib::AppConfig::Exceptions::ConfigLocked
      end
    end
  end

  context '#preferred_configuration_file' do
    it 'has a default configuration file which is the preferred place to store the configuration' do
      with_environment 'HOME' => working_directory do
        config_klass = Class.new(AppConfig) do

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.preferred_configuration_file).to eq File.expand_path('~/.config/my_application/tests.yaml')
      end
    end

    it 'works with nested module names' do
      with_environment 'HOME' => working_directory do
        config_klass = Class.new(AppConfig) do

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication::MySub'
          end
        end

        config = config_klass.new
        expect(config.preferred_configuration_file).to eq File.expand_path('~/.config/my_application/my_sub/tests.yaml')
      end
    end
  end

  context 'config files' do

    it 'looks at ~/.test.yaml' do
      with_environment 'HOME' => working_directory do
        create_file '.tests.yaml', <<-EOS.strip_heredoc
        ---
        opt1: hello world
        EOS

        config_klass = Class.new(AppConfig) do
          option_reader :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to eq 'hello world'
      end
    end

    it 'looks at ~/.config/my_application/tests.yaml' do
      with_environment 'HOME' => working_directory do
        create_file '.config/my_application/tests.yaml', <<-EOS.strip_heredoc
        ---
        opt1: hello world
        EOS

        config_klass = Class.new(AppConfig) do
          option_reader :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to eq 'hello world'
      end
    end

    it 'looks at ~/.my_application/tests.yaml' do
      with_environment 'HOME' => working_directory do
        create_file '.my_application/tests.yaml', <<-EOS.strip_heredoc
        ---
        opt1: hello world
        EOS

        config_klass = Class.new(AppConfig) do
          option_reader :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to eq 'hello world'
      end
    end

    it 'looks at ~/.tests.yaml' do
      with_environment 'HOME' => working_directory do
        create_file '.tests.yaml', <<-EOS.strip_heredoc
        ---
        opt1: hello world
        EOS

        config_klass = Class.new(AppConfig) do
          option_reader :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to eq 'hello world'
      end
    end

    it 'looks at ~/.testsrc' do
      with_environment 'HOME' => working_directory do
        create_file '.testsrc', <<-EOS.strip_heredoc
        ---
        opt1: hello world
        EOS

        config_klass = Class.new(AppConfig) do
          option_reader :opt1, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to eq 'hello world'
      end
    end

    it 'loads yaml files with the following data types' do
      with_environment 'HOME' => working_directory do
        create_file '.testsrc', <<-EOS.strip_heredoc
        ---
        opt1: hello world
        opt2: :test
        opt3: 1
        opt4: true
        opt5: false
        opt6:
          - a
          - b
        opt7:
          name: berni
        EOS

        config_klass = Class.new(AppConfig) do
          option_reader :opt1, nil
          option_reader :opt2, nil
          option_reader :opt3, nil
          option_reader :opt4, nil
          option_reader :opt5, nil
          option_reader :opt6, nil
          option_reader :opt7, nil

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.opt1).to eq 'hello world'
      end
    end

    it 'raises error on invalid yaml file' do
      with_environment 'HOME' => working_directory do
        create_file '.testsrc', random_binary_string(100)

        config_klass = Class.new(AppConfig) do
          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        expect { config_klass.new }.to raise_error FeduxOrgStdlib::AppConfig::Exceptions::ConfigFileNotReadable
      end
    end

    it 'returns an empty config if data file cannot be transformed to hash' do
      with_environment 'HOME' => working_directory do
        create_file '.testsrc', <<-EOS.strip_heredoc
        ---
        - hello
        - world
        EOS

        config_klass = Class.new(AppConfig) do
          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        result = capture :stderr do
          config_klass.new 
        end

        expect(result).to include "There seems"
      end
    end
  end

  context '#to_s' do
    it 'outputs a list of variables' do
      with_environment 'HOME' => working_directory do
        config_klass = Class.new(AppConfig) do
          option :opt1, 'test1'
          option :opt2, 'test2'

          def _class_name
            'TestConfig'
          end

          def _module_name
            'MyApplication'
          end
        end

        config = config_klass.new
        expect(config.to_s).to eq <<-EOS.strip_heredoc.chomp
          option | value
          ------ + --------------------------------------------------------------------------------
            opt1 | test1
            opt2 | test2
        EOS
      end
    end
  end
end