class Xcodeproj::Project

def ==(other)
  other.respond_to?(:to_hash) && @plist == other.to_hash
end

def add_object_hash(uuid, attributes)
  if attributes['isa'] !~ /^(PBX|XC)/
    raise ArgumentError, "Attempted to insert a `#{attributes['isa']}' instance into the objects hash, which is not allowed."
  end
  objects_hash[uuid] = attributes
end

def add_system_framework(name)
  path = "System/Library/Frameworks/#{name}.framework"
  if file = files.where(:path => path)
    file
  else
    group = groups.where('name' => 'Frameworks') || groups.new('name' => 'Frameworks')
    group.files.new({
      'name' => "#{name}.framework",
      'path' => path,
      'sourceTree' => 'SDKROOT'
    })
  end
end

def build_settings(name)
  root_object.build_configuration_list.build_settings(name)
end

def files
  objects.list_by_class(PBXFileReference)
end

def group(name)
  groups.object_named(name)
end

def groups
  objects.list_by_class(PBXGroup)
end

def initialize(xcodeproj = nil)
  if xcodeproj
    file = File.join(xcodeproj, 'project.pbxproj')
    @plist = Xcodeproj.read_plist(file.to_s)
  else
    @plist = {
      'archiveVersion' => '1',
      'classes' => {},
      'objectVersion' => '46',
      'objects' => {}
    }
    main_group = groups.new
    self.root_object = objects.add(PBXProject, {
      'attributes' => { 'LastUpgradeCheck' => '0420' },
      'compatibilityVersion' => 'Xcode 3.2',
      'developmentRegion' => 'English',
      'hasScannedForEncodings' => '0',
      'knownRegions' => ['en'],
      'mainGroup' => main_group.uuid,
      'productRefGroup' => main_group.groups.new('name' => 'Products').uuid,
      'projectDirPath' => '',
      'projectRoot' => '',
      'targets' => []
    })
    config_list = objects.add(XCConfigurationList)
    config_list.default_configuration_name = 'Release'
    config_list.default_configuration_is_visible = '0'
    config_list.build_configurations.new('name' => 'Debug')
    config_list.build_configurations.new('name' => 'Release')
    self.root_object.build_configuration_list = config_list
    # TODO make this work
    #self.root_object.product_reference = groups.new('name' => 'Products').uuid
  end
end

def main_group
  objects[root_object.attributes['mainGroup']]
end

def objects
  PBXObjectList.new(AbstractPBXObject, self) do |list|
    list.let(:uuid_scope) { objects_hash.keys }
  end
end

def objects_hash
  @plist['objects']
end

def products
  products_group.children
end

def products_group
  root_object.products_group
end

def root_object
  objects[@plist['rootObject']]
end

def root_object=(object)
  @plist['rootObject'] = object.uuid
end

def save_as(projpath)
  projpath = projpath.to_s
  FileUtils.mkdir_p(projpath)
  Xcodeproj.write_plist(@plist, File.join(projpath, 'project.pbxproj'))
end

def source_files
  source_files = {}
  groups.each do |group|
    next if group.name.nil? || IGNORE_GROUPS.include?(group.name)
    source_files[group.name] = group.source_files.map(&:pathname)
  end
  source_files
end

def targets
  # Better to check the project object for targets to ensure they are
  # actually there so the project will work
  root_object.targets
end

def to_hash
  @plist
end