# -----------------------------------------------------------------------
#  Copyright © 2012 ShepHertz Technologies Pvt Ltd. All rights reserved.
# -----------------------------------------------------------------------

require 'json/pure'
require 'App42_Ruby_API/App42ResponseBuilder'
require 'gallery/Album'

module App42
  module Gallery
    #
    #
    # AlbumResponseBuilder class converts the JSON response retrieved from the
    # server to the value object i.e Album
    #
    #
    class AlbumResponseBuilder < App42ResponseBuilder
      #
      # Converts the response in JSON format to the value object i.e Album
      #
      # @param json
      #      - response in JSON format
      #
      # @return Album object filled with json data
      #
      #
      def buildResponse(json)
        albumsJSONObj = getServiceJSONObject("albums", json)
        albumJSONObj = albumsJSONObj.fetch("album")
        albumObj = App42::Gallery::Album.new()

        photoList = Array.new
        albumObj.photoList = photoList

        albumObj.strResponse=json
        albumObj.isResponseSuccess= isResponseSuccess(json)
        buildObjectFromJSONTree(albumObj, albumJSONObj);

        if albumJSONObj.key?("photos") == false
          return albumObj
        end

        if albumJSONObj.fetch("photos").key?("photo") == false
          return albumObj
        end

        if albumJSONObj.fetch("photos").fetch("photo").instance_of?(Hash)
          #Single Entry
          photoObj = App42::Gallery::Photo.new(albumObj)
          buildObjectFromJSONTree(photoObj, albumJSONObj.fetch("photos").fetch("photo"));
          photoObj = setTagList(photoObj, albumJSONObj.fetch("photos").fetch("photo"));
        else
          # Multiple Entry
          photoJSONArray = albumJSONObj.fetch("photos").fetch("photo");

          photoJSONArray.length.times do |i|
            photoJSONObj = photoJSONArray[i]
            photoObj = App42::Gallery::Photo.new(albumObj)
            buildObjectFromJSONTree(photoObj, photoJSONObj);
            photoObj = setTagList(photoObj, photoJSONObj);
          end
        end
        return albumObj
      end

      #
      # Converts the Album JSON object to the value object i.e Album
      #
      # @param albumsJSONObj
      #      - Album data as JSONObject
      #
      # @return Album object filled with json data
      #
      #
      def buildAlbumObject(albumsJSONObj)
        albumObj = App42::Gallery::Album.new
        buildObjectFromJSONTree(albumObj, albumsJSONObj);

        photoList = Array.new
        albumObj.photoList = photoList

        if albumsJSONObj.key?("photos") && albumsJSONObj.fetch("photos").key?("photo")
          if albumsJSONObj.fetch("photos").fetch("photo").instance_of?(Hash)
            photoJsonObj = albumsJSONObj.fetch("photos").fetch("photo");

            # Single Entry
            photoObj = App42::Gallery::Photo.new(albumObj)
            buildObjectFromJSONTree(photoObj, albumsJSONObj.fetch("photos").fetch("photo"));
            photoObj = setTagList(photoObj, photoJsonObj);
          else

            # Multiple Entry
            photoJSONArray = albumsJSONObj.fetch("photos").fetch("photo")

            photoJSONArray.length.times do |j|
              photoJSONObj = photoJSONArray[j]
              photoObj = App42::Gallery::Photo.new(albumObj)
              buildObjectFromJSONTree(photoObj, photoJSONObj);
              photoObj = setTagList(photoObj, photoJSONObj);
            end
          end
        end
        return albumObj;
      end

      #
      # Converts the response in JSON format to the list of value objects i.e
      # Album
      #
      # @param json
      #      - response in JSON format
      #
      #@return List of Album object filled with json data
      #

      def buildArrayResponse(json)
        albumsJSONObj = getServiceJSONObject("albums", json)
        albumList = Array.new

        if albumsJSONObj.fetch("album").instance_of?(Array)
          albumJSONArray = albumsJSONObj.fetch("album");
          albumJSONArray.length.times do |i|
            albumJSONObj = albumJSONArray[i]
            album = buildAlbumObject(albumJSONObj);
            album.strResponse=json
            album.isResponseSuccess= (isResponseSuccess(json))
            albumList.push(album)
          end
        else
          albumJSONObject =  albumsJSONObj.fetch("album");
          album = buildAlbumObject(albumJSONObject);
          album.strResponse=json
          album.isResponseSuccess= (isResponseSuccess(json))
          albumList.push(album)
        end
        return albumList
      end

      #
      # set tags to the list
      #
      # @param photoObj
      # @param photoJsonObj
      #
      # @return photo object
      #
      # @raise Exception
      #

      def setTagList(photoObj, photoJsonObj)
        if photoJsonObj.key?("tags")
          tagList = Array.new
          if photoJsonObj.fetch("tags").instance_of?(Array)
            tagArr = photoJsonObj.fetch("tags");
            tagArr.length.times do |i|
              tagList.push(tagArr.fetch(i));
            end
          else
            tagList.push(photoJsonObj.fetch("tags"));
          end
          photoObj.tagList = (tagList);
        end
        return photoObj;
      end

    end
  end
end