class Pod::XCConfig::Hook

def config
  Config.instance
end

def create_symlink_to_hook_dir
  # Create symlink to hook dir (under Pods) so that xcconfigs can be included
  # in a pod target's xcconfig without caring about absolute/relative paths
  path = Pod::Config.instance.sandbox.root / config.hook_dir
  FileUtils.rm_rf(path) if path.exist?
  File.symlink(File.absolute_path(config.hook_dir), path)
end

def initialize(context)
  @context = context
end

def prepend_includes(path)
  target, config_name, = path.basename.to_s.split(".")
  is_agg_target = target.start_with?("Pods-")
  return if !is_agg_target && config.aggregate_targets_only?
  includes = [
    "__base__.xcconfig",
    "#{config_name}.xcconfig",
    "#{target}.__base__.xcconfig",
    "#{target}.#{config_name}.xcconfig",
  ].map { |p| "#include? \"#{config.hook_dir}/#{p}\"" }
  to_prepend = <<~HEADER
    #{includes.join("\n")}
    // ------------------------------------------------------------
    // The above includes were injected by cocoapods-xcconfig-hooks
    // ------------------------------------------------------------
  HEADER
  path.write(to_prepend + path.read)
end

def run
  sandbox.target_support_files_root.glob("*/*.xcconfig") do |path|
    prepend_includes(path)
  end
  create_symlink_to_hook_dir
end

def sandbox
  @context.sandbox
end