# frozen_string_literal: true

# 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
    #
    # @api private
    #
    module TakesScreenshot
      #
      # Save a PNG screenshot of the viewport to the given path
      #
      # @api public
      #

      def save_screenshot(png_path, full_page: false)
        extension = File.extname(png_path).downcase
        if extension != '.png'
          WebDriver.logger.warn 'name used for saved screenshot does not match file type. ' \
                                'It should end with .png extension',
                                id: :screenshot
        end
        File.open(png_path, 'wb') { |f| f << screenshot_as(:png, full_page: full_page) }
      end

      #
      # Return a PNG screenshot in the given format as a string
      #
      # @param [:base64, :png] format
      # @param [Boolean] full_page allows taking full page screenshots if supported
      # @return String screenshot
      #
      # @api public

      def screenshot_as(format, full_page: false)
        if full_page && !respond_to?(:save_full_page_screenshot)
          raise Error::UnsupportedOperationError, "Full Page Screenshots are not supported for #{inspect}"
        end

        case format
        when :base64
          full_page ? full_screenshot : screenshot
        when :png
          screenshot_as(:base64, full_page: full_page).unpack1('m')
        else
          raise Error::UnsupportedOperationError, "unsupported format: #{format.inspect}"
        end
      end
    end # TakesScreenshot
  end # WebDriver
end # Selenium
