# encoding: utf-8
#
# Licensed to the Software Freedom Conservancy (SFC) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The SFC licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.

module Selenium
  module WebDriver
    module Firefox
      class Profile
        include ProfileHelper

        VALID_PREFERENCE_TYPES   = [TrueClass, FalseClass, Integer, Float, String].freeze
        WEBDRIVER_EXTENSION_PATH = File.expand_path("#{WebDriver.root}/selenium/webdriver/firefox/extension/webdriver.xpi")
        WEBDRIVER_PREFS          = {
          native_events: 'webdriver_enable_native_events',
          untrusted_certs: 'webdriver_accept_untrusted_certs',
          untrusted_issuer: 'webdriver_assume_untrusted_issuer',
          port: 'webdriver_firefox_port',
          log_file: 'webdriver.log.file'
        }.freeze

        attr_reader   :name, :log_file
        attr_writer   :secure_ssl, :native_events, :load_no_focus_lib

        class << self
          def ini
            @ini ||= ProfilesIni.new
          end

          def from_name(name)
            profile = ini[name]
            return profile if profile
            raise Error::WebDriverError, "unable to find profile named: #{name.inspect}"
          end

          def default_preferences
            @default_preferences ||= JSON.parse(
              File.read(File.expand_path("#{WebDriver.root}/selenium/webdriver/firefox/extension/prefs.json"))
            ).freeze
          end
        end

        #
        # Create a new Profile instance
        #
        # @example User configured profile
        #
        #   profile = Selenium::WebDriver::Firefox::Profile.new
        #   profile['network.proxy.http'] = 'localhost'
        #   profile['network.proxy.http_port'] = 9090
        #
        #   driver = Selenium::WebDriver.for :firefox, :profile => profile
        #

        def initialize(model = nil)
          @model = verify_model(model)

          model_prefs = read_model_prefs

          if model_prefs.empty?
            @native_events     = DEFAULT_ENABLE_NATIVE_EVENTS
            @secure_ssl        = DEFAULT_SECURE_SSL
            @untrusted_issuer  = DEFAULT_ASSUME_UNTRUSTED_ISSUER
            @load_no_focus_lib = DEFAULT_LOAD_NO_FOCUS_LIB

            @additional_prefs  = {}
          else
            # TODO: clean this up
            @native_events     = model_prefs.delete(WEBDRIVER_PREFS[:native_events]) == 'true'
            @secure_ssl        = model_prefs.delete(WEBDRIVER_PREFS[:untrusted_certs]) != 'true'
            @untrusted_issuer  = model_prefs.delete(WEBDRIVER_PREFS[:untrusted_issuer]) == 'true'
            # not stored in profile atm, so will always be false.
            @load_no_focus_lib = model_prefs.delete(WEBDRIVER_PREFS[:load_no_focus_lib]) == 'true'
            @additional_prefs  = model_prefs
          end

          @extensions = {}
        end

        def layout_on_disk
          profile_dir = @model ? create_tmp_copy(@model) : Dir.mktmpdir('webdriver-profile')
          FileReaper << profile_dir

          install_extensions(profile_dir)
          delete_lock_files(profile_dir)
          delete_extensions_cache(profile_dir)
          update_user_prefs_in(profile_dir)

          profile_dir
        end

        #
        # Set a preference for this particular profile.
        #
        # @see http://kb.mozillazine.org/About:config_entries
        # @see http://preferential.mozdev.org/preferences.html
        #

        def []=(key, value)
          unless VALID_PREFERENCE_TYPES.any? { |e| value.is_a? e }
            raise TypeError, "expected one of #{VALID_PREFERENCE_TYPES.inspect}, got #{value.inspect}:#{value.class}"
          end

          if value.is_a?(String) && Util.stringified?(value)
            raise ArgumentError, "preference values must be plain strings: #{key.inspect} => #{value.inspect}"
          end

          @additional_prefs[key.to_s] = value
        end

        def port=(port)
          self[WEBDRIVER_PREFS[:port]] = port
        end

        def log_file=(file)
          @log_file = file
          self[WEBDRIVER_PREFS[:log_file]] = file
        end

        def add_webdriver_extension
          return if @extensions.key?(:webdriver)
          add_extension(WEBDRIVER_EXTENSION_PATH, :webdriver)
        end

        #
        # Add the extension (directory, .zip or .xpi) at the given path to the profile.
        #

        def add_extension(path, name = extension_name_for(path))
          @extensions[name] = Extension.new(path)
        end

        def native_events?
          @native_events == true
        end

        def load_no_focus_lib?
          @load_no_focus_lib == true
        end

        def secure_ssl?
          @secure_ssl == true
        end

        def assume_untrusted_certificate_issuer?
          @untrusted_issuer == true
        end

        def assume_untrusted_certificate_issuer=(bool)
          @untrusted_issuer = bool
        end

        def proxy=(proxy)
          unless proxy.is_a? Proxy
            raise TypeError, "expected #{Proxy.name}, got #{proxy.inspect}:#{proxy.class}"
          end

          case proxy.type
          when :manual
            self['network.proxy.type'] = 1

            set_manual_proxy_preference 'ftp', proxy.ftp
            set_manual_proxy_preference 'http', proxy.http
            set_manual_proxy_preference 'ssl', proxy.ssl
            set_manual_proxy_preference 'socks', proxy.socks

            self['network.proxy.no_proxies_on'] = if proxy.no_proxy
                                                    proxy.no_proxy
                                                  else
                                                    ''
                                                  end
          when :pac
            self['network.proxy.type'] = 2
            self['network.proxy.autoconfig_url'] = proxy.pac
          when :auto_detect
            self['network.proxy.type'] = 4
          else
            raise ArgumentError, "unsupported proxy type #{proxy.type}"
          end

          proxy
        end

        def encoded
          Zipper.zip(layout_on_disk)
        end

        private

        def set_manual_proxy_preference(key, value)
          return unless value

          host, port = value.to_s.split(':', 2)

          self["network.proxy.#{key}"] = host
          self["network.proxy.#{key}_port"] = Integer(port) if port
        end

        def install_extensions(directory)
          destination = File.join(directory, 'extensions')

          @extensions.each do |name, extension|
            WebDriver.logger.debug({extenstion: name}.inspect)
            extension.write_to(destination)
          end
        end

        def read_model_prefs
          return {} unless @model

          read_user_prefs(File.join(@model, 'user.js'))
        end

        def delete_extensions_cache(directory)
          FileUtils.rm_f File.join(directory, 'extensions.cache')
        end

        def delete_lock_files(directory)
          %w[.parentlock parent.lock].each do |name|
            FileUtils.rm_f File.join(directory, name)
          end
        end

        def extension_name_for(path)
          File.basename(path, File.extname(path))
        end

        def update_user_prefs_in(directory)
          path = File.join(directory, 'user.js')
          prefs = read_user_prefs(path)

          prefs.merge! self.class.default_preferences.fetch 'mutable'
          prefs.merge! @additional_prefs
          prefs.merge! self.class.default_preferences.fetch 'frozen'

          prefs[WEBDRIVER_PREFS[:untrusted_certs]]  = !secure_ssl?
          prefs[WEBDRIVER_PREFS[:native_events]]    = native_events?
          prefs[WEBDRIVER_PREFS[:untrusted_issuer]] = assume_untrusted_certificate_issuer?

          # If the user sets the home page, we should also start up there
          prefs['startup.homepage_welcome_url'] = prefs['browser.startup.homepage']

          write_prefs prefs, path
        end

        def read_user_prefs(path)
          prefs = {}
          return prefs unless File.exist?(path)

          File.read(path).split("\n").each do |line|
            next unless line =~ /user_pref\("([^"]+)"\s*,\s*(.+?)\);/
            key = Regexp.last_match(1).strip
            value = Regexp.last_match(2).strip

            # wrap the value in an array to make it a valid JSON string.
            prefs[key] = JSON.parse("[#{value}]").first
          end

          prefs
        end

        def write_prefs(prefs, path)
          File.open(path, 'w') do |file|
            prefs.each do |key, value|
              file.puts %{user_pref("#{key}", #{value.to_json});}
            end
          end
        end
      end # Profile
    end # Firefox
  end # WebDriver
end # Selenium