# frozen_string_literal: true

require 'minitest_config'

describe Cartage::Rack do
  include Rack::Test::Methods

  let(:app) { Cartage::Rack(path) }
  let(:path) { 'test/hillvalley' }
  let(:metadata) {
    {
      'package' => {
        'name' => 'hillvalley',
        'repo' => {
          'type' => 'git',
          'url' => 'git:doc@hillvalley.com/delorean.git'
        },
        'hashref' => 'd0cb1ff',
        'timestamp' => '19851027104200'
      }
    }
  }

  def around(&block)
    stub_dir_pwd path do
      instance_stub Pathname, :exist?, true do
        instance_stub Pathname, :read, -> { metadata.to_json } do
          super(&block)
        end
      end
    end
  end

  it 'inspects nicely for `rake routes` in Rails' do
    assert_equal 'Cartage::Rack for hillvalley (release_metadata_json)',
      Cartage::Rack().inspect
  end

  it 'returns application/json content by default' do
    get '/'
    assert_equal 'application/json', last_response.header['Content-Type']
  end

  it 'returns text/plain content when requested' do
    get '/.txt'
    assert_equal 'text/plain', last_response.header['Content-Type']
  end

  context 'application environment' do
    it 'uses $RAILS_ENV first' do
      stub_env 'RAILS_ENV' => 'vne_sliar',
               'APP_ENV'   => 'vne_ppa',
               'RACK_ENV'  => 'vne_kcar' do
        get '/'

        metadata['env'] = { 'name' => 'vne_sliar' }

        assert last_response.ok?
        assert_equal metadata.to_json, last_response.body
        assert_equal 'application/json', last_response.header['Content-Type']
      end
    end

    it 'uses $APP_ENV second' do
      stub_env 'RAILS_ENV' => nil, 'APP_ENV' => 'vne_ppa', 'RACK_ENV' => 'vne_kcar' do
        get '/'

        metadata['env'] = { 'name' => 'vne_ppa' }

        assert last_response.ok?
        assert_equal metadata.to_json, last_response.body
        assert_equal 'application/json', last_response.header['Content-Type']
      end
    end

    it 'uses $RACK_ENV third' do
      stub_env 'RAILS_ENV' => nil, 'APP_ENV' => nil, 'RACK_ENV' => 'vne_kcar' do
        get '/'

        metadata['env'] = { 'name' => 'vne_kcar' }

        assert last_response.ok?
        assert_equal metadata.to_json, last_response.body
        assert_equal 'application/json', last_response.header['Content-Type']
      end
    end

    it 'falls through to UNKNOWN without either $RAILS_ENV, $APP_ENV or $RACK_ENV' do
      stub_env 'RAILS_ENV' => nil, 'APP_ENV' => nil, 'RACK_ENV' => nil do
        get '/'

        metadata['env'] = { 'name' => 'UNKNOWN' }

        assert last_response.ok?
        assert_equal metadata.to_json, last_response.body
        assert_equal 'application/json', last_response.header['Content-Type']
      end
    end
  end

  context 'timestamp' do
    around do |&block|
      metadata['package'].delete('timestamp')
      super(&block)
    end

    it 'is omitted if not present in the metadata' do
      stub_env 'RAILS_ENV' => nil, 'RACK_ENV' => nil do
        get '/'

        metadata['env'] = { 'name' => 'UNKNOWN' }

        assert last_response.ok?
        assert_equal metadata.to_json, last_response.body
        assert_equal 'application/json', last_response.header['Content-Type']
      end
    end
  end

  context 'text/plain' do
    it 'returns a useful plaintext format' do
      stub_env 'RAILS_ENV' => 'production' do
        get '/.text'

        assert last_response.ok?
        assert_equal <<-text.chomp, last_response.body
name: hillvalley
environment: production
hashref: d0cb1ff
timestamp: 19851027104200
git: git:doc@hillvalley.com/delorean.git
        text
        assert_equal 'text/plain', last_response.header['Content-Type']
      end
    end

    it 'skips the repo if package.repo is missing' do
      stub_env 'RAILS_ENV' => 'production' do
        metadata['package'].delete('repo')

        get '/.text'

        assert last_response.ok?
        assert_equal <<-text.chomp, last_response.body
name: hillvalley
environment: production
hashref: d0cb1ff
timestamp: 19851027104200
        text
        assert_equal 'text/plain', last_response.header['Content-Type']
      end
    end

    it 'skips the timestamp if package.timestamp is missing' do
      stub_env 'RAILS_ENV' => 'production' do
        metadata['package'].delete('timestamp')

        get '/.text'

        assert last_response.ok?
        assert_equal <<-text.chomp, last_response.body
name: hillvalley
environment: production
hashref: d0cb1ff
git: git:doc@hillvalley.com/delorean.git
        text
        assert_equal 'text/plain', last_response.header['Content-Type']
      end
    end
  end

  context 'filter' do
    let(:app) {
      Cartage::Rack(path) { |content|
        content['env']['name'] = content['env']['name'].reverse
      }
    }

    it 'applies the filter before returning' do
      stub_env 'RAILS_ENV' => 'vne_sliar' do
        get '/'

        metadata['env'] = { 'name' => 'rails_env' }

        assert last_response.ok?
        assert_equal metadata.to_json, last_response.body
        assert_equal 'application/json', last_response.header['Content-Type']
      end
    end
  end
end