module Support
  module Browser
    # Base class for browsers platforms. Local, Grid, and Docker inherit off of this.
    class Base
      def instance
        return @instance if @instance
        fail "No instance created yet! Run #start first!"
      end

      def start
        @instance = instantiate_watir_browser
        add_checkers
        resize_window
      end

      def stop
        instance.close
      end

      def restart
        stop
        start
      end

      def cookies
        # workaround because @instance.cookies.to_a fails on remote chromedriver
        instance.execute_script("return document.cookie.split('\;')")
      end

      def firefox?
        @name == "firefox"
      end

      def console_log
        @instance.driver.manage.logs.get(:browser)
      end

      private

      def resize_window
        browser_window = @instance.driver.manage.window

        browser_window.move_to(0, 0)
        browser_window.resize_to(@dimensions[:width], @dimensions[:height])
      end

      def add_checkers
        after_hooks = @instance.after_hooks
        after_hooks.add { check_for_alert }
        after_hooks.add { check_apache }
        after_hooks.add { check_error }
        after_hooks.add { check_application_error }
        after_hooks.add { check_fatal_error }
      end

      def check_for_alert
        @instance.url # Raises an exception if we can't get current page URL
      rescue Selenium::WebDriver::Error::UnhandledAlertError
        alert_text = @instance.alert.text
        @instance.alert.ok
        raise "Found & dismissed a JS alert with text: #{alert_text}"
      end

      def check_apache
        return unless @instance.h1(text: "503 Service Unavailable").present?
        # Normally, 503s only appear during deployments to qaorch.
        # TODO: diagnose and fix the problems with qaorch

        # Kernel.puts "[Cucumber] Apache on #{DOMAINS[:oa]} seems to be having issues. "\
        # "Termininating Cucumber run!!!"
        # Cucumber.wants_to_quit = true
        fail "Cucumber is terminating due to web server issue: #{@instance.text}"
      end

      def check_error
        return unless @instance.h1(text: /sorry, an error has occurred/).present?
        error_body = @instance.div(id: "content").text
        fail "Error seen: #{error_body}"
      end

      def check_application_error
        return unless @instance.h1(text: /Application Error/).present?
        error_body = @instance.text
        fail "Application Error Seen! #{error_body}"
      end

      def check_fatal_error
        return unless @instance.table(class: "xdebug-error").present?
        error_body = @instance.body.text
        fail "Error Seen: #{error_body}"
      end
    end
  end
end