module EngineCart

# File lib/engine_cart.rb, line 109
def self.check_for_gemfile_stanza
  return unless File.exist? 'Gemfile'

  unless File.readlines('Gemfile').grep(/#{EngineCart.gemfile_stanza_check_line}/).any?
    Bundler.ui.warn "[EngineCart] For better results, consider updating the EngineCart stanza in your Gemfile with:\n\n"
    Bundler.ui.warn EngineCart.gemfile_stanza_text
  end
end

# File lib/engine_cart.rb, line 97
def self.configuration(options = {})
  @configuration ||= EngineCart::Configuration.new(options)
end

# File lib/engine_cart.rb, line 118
def self.debug=(debug)
  @debug = debug
end

# File lib/engine_cart.rb, line 122
def self.debug?
  @debug
end

# File lib/engine_cart.rb, line 93
def self.env_fingerprint
  { RUBY_DESCRIPTION: RUBY_DESCRIPTION, BUNDLE_GEMFILE: Bundler.default_gemfile.to_s }.reject { |k, v| v.nil? || v.empty? }
end

# File lib/engine_cart.rb, line 89
def self.extra_fingerprinted_files
  @extra_fingerprinted_files || []
end

# File lib/engine_cart.rb, line 85
def self.extra_fingerprinted_files=(extra_fingerprinted_files)
  @extra_fingerprinted_files = extra_fingerprinted_files
end

# File lib/engine_cart.rb, line 68
def self.fingerprint
  { env: env_fingerprint }.merge(files:
    fingerprinted_files.map do |file|
      { file: file, fingerprint: Digest::MD5.file(file).to_s }
    end
  )
end

# File lib/engine_cart.rb, line 27
def self.fingerprint_current?

  unless File.exist? stored_fingerprint_file
    STDERR.puts "No finger print file found: #{stored_fingerprint_file}" if debug?
    return false
  end
  content = File.read(stored_fingerprint_file)
  data = JSON.parse(content, symbolize_names: true)
  calculated = fingerprint

  return true if data == calculated
  if debug?
    STDERR.puts "Fingerprint mismatch:\n\n"

    data.keys.each do |key|
      case data[key]
      when Array
        data[key].zip(calculated[key]).each do |(stored, calc)|
          STDERR.puts("#{key}:\nstored: #{stored}\ncalculate: #{calc}") if stored != calc
        end
      else
        STDERR.puts("#{key}:\nstored: #{data[key]}\ncalculate: #{calculated[key]}") if data[key] != calculated[key]
      end
    end
  end

  false
rescue
  false
end

# File lib/engine_cart.rb, line 23
def self.fingerprint_expired?
  !fingerprint_current?
end

# File lib/engine_cart.rb, line 76
def self.fingerprinted_files
  Dir.glob("./*.gemspec").select { |f| File.file? f } +
    [Bundler.default_gemfile.to_s, Bundler.default_lockfile.to_s] +
    Dir.glob("./db/migrate/*").select { |f| File.file? f } +
    Dir.glob("./lib/generators/**/**").select { |f| File.file? f } +
    Dir.glob("./spec/test_app_templates/**/**").select { |f| File.file? f } +
    configuration.extra_fingerprinted_files
end

# File lib/engine_cart/gemfile_stanza.rb, line 2
def self.gemfile_stanza_check_line
  "engine_cart stanza: 0.10.0"
end

# File lib/engine_cart/gemfile_stanza.rb, line 6
  def self.gemfile_stanza_text
    <<-EOF.gsub(/^    /, '')
    # BEGIN ENGINE_CART BLOCK
    # engine_cart: #{EngineCart::VERSION}
    # #{EngineCart.gemfile_stanza_check_line}
    # the below comes from engine_cart, a gem used to test this Rails engine gem in the context of a Rails app.
    file = File.expand_path('Gemfile', ENV['ENGINE_CART_DESTINATION'] || ENV['RAILS_ROOT'] || File.expand_path('#{EngineCart.destination}', File.dirname(__FILE__)))
    if File.exist?(file)
      begin
        eval_gemfile file
      rescue Bundler::GemfileError => e
        Bundler.ui.warn '[EngineCart] Skipping Rails application dependencies:'
        Bundler.ui.warn e.message
      end
    else
      Bundler.ui.warn "[EngineCart] Unable to find test application dependencies in \#{file}, using placeholder dependencies"

      if ENV['RAILS_VERSION']
        if ENV['RAILS_VERSION'] == 'edge'
          gem 'rails', github: 'rails/rails'
          ENV['ENGINE_CART_RAILS_OPTIONS'] = '--edge --skip-turbolinks'
        else
          gem 'rails', ENV['RAILS_VERSION']
        end
      end

      case ENV['RAILS_VERSION']
      when /^4\.2/
        gem 'responders', '~> 2.0'
        gem 'sass-rails', '>= 5.0'
        gem 'coffee-rails', '~> 4.1.0'
      when /^4\.[01]/
        gem 'sass-rails', '< 5.0'
      end
    end
    # END ENGINE_CART BLOCK
    EOF
  end

# File lib/engine_cart.rb, line 11
def self.load_application! path = nil
  require File.expand_path("config/environment", path || EngineCart.destination)
end

# File lib/engine_cart.rb, line 64
def self.stored_fingerprint_file
  File.expand_path('.generated_engine_cart', EngineCart.destination)
end

# File lib/engine_cart.rb, line 15
def self.within_test_app
  Dir.chdir(EngineCart.destination) do
    Bundler.with_clean_env do
      yield
    end
  end
end

# File lib/engine_cart.rb, line 58
def self.write_fingerprint
  File.open(stored_fingerprint_file, 'w') do |f|
    f.write(EngineCart.fingerprint.to_json)
  end
end