class RubyCritic::Command::Compare

def analyse_branch(branch)
  SourceControlSystem::Git.switch_branch(Config.send(branch))
  critic = critique(branch)
  Config.send(:"#{branch}_score=", critic.score)
  Config.root = branch_directory(branch)
  report(critic)
end

def analyse_modified_files
  modified_files = Config.feature_branch_collection.where(SourceControlSystem::Git.modified_files)
  analysed_modules = AnalysedModulesCollection.new(modified_files.map(&:path), modified_files)
  Config.root = "#{Config.root}/compare"
  report(analysed_modules)
end

def branch_directory(branch)
  "#{Config.root}/compare/#{Config.send(branch)}"
end

def build_details
  details = "Base branch (#{Config.base_branch}) score: #{Config.base_branch_score} \n"\
            "Feature branch (#{Config.feature_branch}) score: #{Config.feature_branch_score} \n"
  File.open("#{Config.compare_root_directory}/build_details.txt", 'w') { |file| file.write(details) }
end

def compare_branches
  @build_number = Utils::BuildNumberFile.new.update_build_number
  set_root_paths
  original_no_browser_config = Config.no_browser
  Config.no_browser = true
  analyse_branch(:base_branch)
  analyse_branch(:feature_branch)
  Config.no_browser = original_no_browser_config
  analyse_modified_files
  compare_code_quality
end

def compare_code_quality
  build_details
  compare_threshold
end

def compare_threshold
  return unless mark_build_fail?
  print("Threshold: #{Config.threshold_score}\n")
  print("Difference: #{(Config.base_branch_score - Config.feature_branch_score).abs}\n")
  abort('The score difference between the two branches is over the threshold.')
end

def critique(branch)
  module_collection = AnalysersRunner.new(paths).run
  Config.send(:"#{branch}_collection=", module_collection)
  RevisionComparator.new(paths).statuses = module_collection
end

def execute
  compare_branches
  status_reporter.score = Config.feature_branch_score
  status_reporter
end

def initialize(options)
  super
  @build_number = 0
end

def mark_build_fail?
  Config.threshold_score >= 0 && threshold_reached?
end

def set_root_paths
  Config.base_root_directory = Pathname.new(branch_directory(:base_branch))
  Config.feature_root_directory = Pathname.new(branch_directory(:feature_branch))
  Config.compare_root_directory = Pathname.new("#{Config.root}/compare")
end

def threshold_reached?
  (Config.base_branch_score - Config.feature_branch_score) > Config.threshold_score
end