class ERBLint::RunnerConfigResolver

def base_configs(file_loader, inherit_from)
  configs = Array(inherit_from).compact.map do |f|
    inherited_file = File.expand_path(f, file_loader.base_path)
    file_loader.yaml(inherited_file)
  end
  configs.compact
end

def gem_config_path(gem_name, relative_config_path)
  spec = Gem::Specification.find_by_name(gem_name)
  File.join(spec.gem_dir, relative_config_path)
rescue Gem::LoadError => e
  raise Gem::LoadError, "Unable to find gem #{gem_name}; is the gem installed? #{e}"
end

def resolve_inheritance(hash, file_loader)
  inherited_files = Array(hash["inherit_from"])
  base_configs(file_loader, inherited_files).reverse_each do |base_config|
    base_config.each do |k, v|
      next unless v.is_a?(Hash)
      v = v.deep_merge(hash[k]) if hash.key?(k)
      hash[k] = v
    end
  end
end

def resolve_inheritance_from_gems(hash, gems)
  (gems || {}).each_pair do |gem_name, config_path|
    raise(ArgumentError, "can't inherit configuration from the erb_lint gem") if gem_name == "erb_lint"
    hash["inherit_from"] = Array(hash["inherit_from"])
    Array(config_path).reverse_each do |path|
      # Put gem configuration first so local configuration overrides it.
      hash["inherit_from"].unshift(gem_config_path(gem_name, path))
    end
  end
end