require 'calabash-cucumber/utils/xctools'
require 'calabash-cucumber/utils/plist_buddy'
require 'sim_launcher'

module Calabash
  module Cucumber

    # methods for checking and setting simulator accessibility
    module SimulatorAccessibility

      include Calabash::Cucumber::XcodeTools
      include Calabash::Cucumber::PlistBuddy

      # quits the iOS Simulator
      #
      # ATM there can only be only simulator open at a time, so simply doing
      # what the sim_launcher gem does:
      #
      #    def quit_simulator
      #      `echo 'application "iPhone Simulator" quit' | osascript`
      #    end
      #
      # works.  I am not sure if we will ever be able to launch more than one
      # simulator, but in case we can, this method will quit the simulator
      # that is indicated by +xcode-select+ or +DEVELOPER_DIR+.
      def quit_simulator
        dev_dir = xcode_developer_dir
        system "/usr/bin/osascript -e 'tell application \"#{dev_dir}/Platforms/iPhoneSimulator.platform/Developer/Applications/iPhone Simulator.app\" to quit'"
      end

      # launches the iOS Simulator indicated by +xcode-select+ or +DEVELOPER_DIR+
      def launch_simulator
        dev_dir = xcode_developer_dir
        system "open -a \"#{dev_dir}/Platforms/iPhoneSimulator.platform/Developer/Applications/iPhone Simulator.app\""
      end

      # resets the simulator content and settings.  it is analogous to touching
      # the menu item.
      #
      # it works by deleting the following directories:
      #
      # * ~/Library/Application Support/iPhone Simulator/Library
      # * ~/Library/Application Support/iPhone Simulator/Library/<sdk>[-64]
      #
      # and relaunching the iOS Simulator which will recreate the Library
      # directory and the latest SDK directory.
      def reset_simulator_content_and_settings
        quit_simulator
        sim_lib_path = File.join(simulator_app_support_dir(), 'Library')
        FileUtils.rm_rf(sim_lib_path)
        simulator_support_sdk_dirs.each do |dir|
          FileUtils.rm_rf(dir)
        end

        launch_simulator

        # this is tricky because we need to wait for the simulator to recreate
        # the directories.  specifically, we need the Accessibility plist to be
        # exist so subsequent calabash launches will be able to enable
        # accessibility.
        #
        # the directories take ~3.0 - ~5.0 to create.
        counter = 0
        loop do
          break if counter == 80
          dirs = simulator_support_sdk_dirs
          if dirs.count == 0
            sleep(0.2)
          else
            break if dirs.all? { |dir|
              plist = File.expand_path("#{dir}/Library/Preferences/com.apple.Accessibility.plist")
              File.exists?(plist)
            }
            sleep(0.2)
          end
          counter = counter + 1
        end
      end

      # enables accessibility on any existing iOS Simulator by adjusting the
      # simulator's Library/Preferences/com.apple.Accessibility.plist contents.
      #
      # a simulator 'exists' if has an Application Support directory. for
      # example, the 6.1, 7.0.3-64, and 7.1 simulators exist if the following
      # directories are present:
      #
      #     ~/Library/Application Support/iPhone Simulator/Library/6.1
      #     ~/Library/Application Support/iPhone Simulator/Library/7.0.3-64
      #     ~/Library/Application Support/iPhone Simulator/Library/7.1
      #
      # this method also hides the AXInspector.
      # @param [Hash] opts controls the behavior of the method
      # @option opts [Boolean] :verbose controls logging output
      # @return [Boolean] true iff enabling accessibility worked on all sdk
      #  directories
      def enable_accessibility_on_simulators(opts={})
        results =  simulator_support_sdk_dirs.map do |dir|
          enable_accessibility_in_sdk_dir(dir, opts)
        end
        results.all? { |elm| elm }
      end

      @private

      # enables accessibility on the simulator indicated by
      # +sim_app_support_sdk_dir+.
      #
      # WARNING:  this will quit the simulator
      #
      #   path = '~/Library/Application Support/iPhone Simulator/Library/6.1'
      #   enable_accessibility_in_sdk_dir(path)
      #
      # this method also hides the AXInspector.
      #
      # if the Library/Preferences/com.apple.Accessibility.plist does not exist,
      # this method returns false.
      #
      # @see enable_accessibility_on_simulators for the public API.
      #
      # @param [String] sim_app_support_sdk_dir the directory where the
      #   Library/Preferences/com.apple.Accessibility.plist can be found.
      #
      # @param [Hash] opts controls the behavior of the method
      # @option opts [Boolean] :verbose controls logging output
      # @return [Boolean] iff the plist exists and the plist was successfully
      #   updated.
      def enable_accessibility_in_sdk_dir(sim_app_support_sdk_dir, opts={})
        default_opts = {:verbose => false}
        merged = default_opts.merge(opts)

        plist_path = File.expand_path("#{sim_app_support_sdk_dir}/Library/Preferences/com.apple.Accessibility.plist")

        verbose = merged[:verbose]

        sdk = File.basename(sim_app_support_sdk_dir)
        msgs = ["cannot enable accessibility for #{sdk} SDK"]
        unless File.exists?(plist_path)
          if verbose
            msgs << "expected plist to exist at #{plist_path}"
            calabash_warn(msgs.join("\n"))
          end
          return false
        end

        quit_simulator

        hash = accessibility_properties_hash()

        unless plist_set(hash[:access_enabled], 'bool', 'true', plist_path)
          if verbose
            msgs << "could not set '#{hash[:access_enabled]}' to YES"
            calabash_warn(msgs.join("\n"))
          end
          return false
        end

        unless plist_set(hash[:app_access_enabled], 'bool', 'true', plist_path)
          if verbose
            msgs << "could not set '#{hash[:app_access_enabled]}' to YES"
            calabash_warn(msgs.join("\n"))
          end
          return false
        end

        unless plist_set(hash[:automation_enabled], 'bool', 'true', plist_path)
          if verbose
            msgs << "could not set '#{hash[:automation_enabled]}' to YES"
            calabash_warn(msgs.join("\n"))
          end
          return false
        end

        unless plist_set(hash[:inspector_showing], 'bool', 'false', plist_path)
          if verbose
            msgs << "could not set '#{hash[:inspector_showing]}' to NO"
            calabash_warn(msgs.join("\n"))
          end
          return false
        end

        unless plist_set(hash[:inspector_full_size], 'bool', 'false', plist_path)
          if verbose
            msgs << "could not set '#{hash[:inspector_full_size]}' to NO"
            calabash_warn(msgs.join("\n"))
          end
          return false
        end

        res = plist_set(hash[:inspector_frame], 'string', '{{270, -13}, {276, 166}}', plist_path)
        unless res
          if verbose
            msgs << "could not set '#{hash[:inspector_frame]}'"
            calabash_warn(msgs.join("\n"))
          end
        end
        res
      end


      # a hash table of the accessibility properties that control whether or not
      # accessibility is enabled and whether the AXInspector is visible.
      # @return [Hash] table of accessibility properties found in the
      #  Library/Preferences/com.apple.Accessibility.plist
      def accessibility_properties_hash
        {
              # this is required
              :access_enabled => 'AccessibilityEnabled',
              # i _think_ this is legacy
              :app_access_enabled => 'ApplicationAccessibilityEnabled',

              # i don't know what this does
              :automation_enabled => 'AutomationEnabled',

              # determines if the Accessibility Inspector is showing
              :inspector_showing => 'AXInspectorEnabled',
              # controls if the Accessibility Inspector is expanded or not expanded
              :inspector_full_size => 'AXInspector.enabled',
              # controls the frame of the Accessibility Inspector
              # this is a 'string' => {{0, 0}, {276, 166}}
              :inspector_frame => 'AXInspector.frame'
        }
      end

      # the absolute path the the iPhone Simulator Application Support directory
      # @return [String] absolute path
      def simulator_app_support_dir
        File.expand_path('~/Library/Application Support/iPhone Simulator')
      end

      # returns a list of absolute paths the existing simulator directories.
      #
      # a simulator 'exists' if has an Application Support directory. for
      # example, the 6.1, 7.0.3-64, and 7.1 simulators exist if the following
      # directories are present:
      #
      #     ~/Library/Application Support/iPhone Simulator/Library/6.1
      #     ~/Library/Application Support/iPhone Simulator/Library/7.0.3-64
      #     ~/Library/Application Support/iPhone Simulator/Library/7.1
      #
      # @return[Array<String>] a list of absolute paths to simulator directories
      def simulator_support_sdk_dirs
        sim_app_support_path = simulator_app_support_dir()
        Dir.glob("#{sim_app_support_path}/*").select { |path|
          path =~ /(\d)\.(\d)\.?(\d)?(-64)?/
        }
      end

    end
  end
end