module Geminabox::GemListMerge

def self.merge(local_gem_list, remote_gem_list, strategy:)
  strategy_for(strategy).merge(local_gem_list, remote_gem_list)
end

def self.strategy_for(strategy)
  case strategy
  when :local_gems_take_precedence_over_remote_gems
    LocalGemsTakePrecedenceOverRemoteGems
  when :combine_local_and_remote_gem_versions
    CombineLocalAndRemoteGemVersions
  else
    raise ArgumentError, "Merge strategy must be :local_gems_take_precedence_over_remote_gems (default) or :merge_local_and_remote_gem_versions"
  end
end