# 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 SearchContext
      # @api private
      FINDERS = {
        class: 'class name',
        class_name: 'class name',
        css: 'css selector',
        id: 'id',
        link: 'link text',
        link_text: 'link text',
        name: 'name',
        partial_link_text: 'partial link text',
        tag_name: 'tag name',
        xpath: 'xpath'
      }.freeze

      #
      # Find the first element matching the given arguments
      #
      # When using Element#find_element with :xpath, be aware that webdriver
      # follows standard conventions: a search prefixed with "//" will search
      # the entire document, not just the children of this current node. Use
      # ".//" to limit your search to the children of the receiving Element.
      #
      # @overload find_element(how, what)
      #   @param [Symbol, String] how The method to find the element by
      #   @param [String] what The locator to use
      # @overload find_element(opts)
      #   @param [Hash] opts Find options
      #   @option opts [Symbol] :how Key named after the method to find the element by, containing the locator
      # @return [Element]
      #
      # @raise [Error::NoSuchElementError] if the element doesn't exist
      #

      def find_element(*args)
        how, what = extract_args(args)

        by = FINDERS[how.to_sym]
        raise ArgumentError, "cannot find element by #{how.inspect}" unless by

        bridge.find_element_by by, what.to_s, ref
      rescue Selenium::WebDriver::Error::TimeOutError
        # Implicit Wait times out in Edge
        raise Selenium::WebDriver::Error::NoSuchElementError
      end

      #
      # Find all elements matching the given arguments
      #
      # @see SearchContext#find_element
      #

      def find_elements(*args)
        how, what = extract_args(args)

        by = FINDERS[how.to_sym]
        raise ArgumentError, "cannot find elements by #{how.inspect}" unless by

        bridge.find_elements_by by, what.to_s, ref
      rescue Selenium::WebDriver::Error::TimeOutError
        # Implicit Wait times out in Edge
        []
      end

      private

      def extract_args(args)
        case args.size
        when 2
          args
        when 1
          arg = args.first

          unless arg.respond_to?(:shift)
            raise ArgumentError, "expected #{arg.inspect}:#{arg.class} to respond to #shift"
          end

          # this will be a single-entry hash, so use #shift over #first or #[]
          arr = arg.dup.shift
          unless arr.size == 2
            raise ArgumentError, "expected #{arr.inspect} to have 2 elements"
          end

          arr
        else
          raise ArgumentError, "wrong number of arguments (#{args.size} for 2)"
        end
      end
    end # SearchContext
  end # WebDriver
end # Selenium