module Spree
    module Api
      module V2
        module Platform
          class FirebaseController < ActionController::API
            require 'httparty'
            def firebase_verification(token)
                url = "https://www.googleapis.com/identitytoolkit/v3/relyingparty/getAccountInfo?key=AIzaSyCfY9JHxTinBizeZX7rt9E42dPRgj9NiNQ"
                firebase_verification_call = HTTParty.post(url, headers: { 'Content-Type' => 'application/json' }, body: { 'idToken' => token }.to_json )
                if firebase_verification_call.response.code == "200"
                  firebase_infos = firebase_verification_call.parsed_response
                else
                  raise 'Error'
                end
            end

            def firebase_params
                params
                  .require(:data)
                  .permit(:token)
            end
        
            def firebase_login
                token = firebase_params.fetch(:token)
                firebase_infos = firebase_verification(token)
                email = findEmail(firebase_infos)
                password = findPassword(firebase_infos)
                user = Spree.user_class.find_for_database_authentication(email: email)
                if user.nil?
                  user = ::Spree::User.new
                  user.email = email
                  user.password = password
                  user.private_metadata = firebase_infos
                  user.save
                end
                doorkeeper_response = HTTParty.post(
                  'https://ca97-204-157-173-118.ngrok-free.app/spree_oauth/token/', 
                  headers: { 'Content-Type' => 'application/json' }, 
                  body: { 
                    'grant_type' => 'password',
                    'scope' => 'admin',
                    'username' => email,
                    'password' => password
                  }.to_json )
                render json: doorkeeper_response
            end

            def findEmail(userInfo)
              providerInfo = userInfo['users'][0]['providerUserInfo'][0]['providerId']
              federatedID = userInfo['users'][0]['providerUserInfo'][0]['federatedId']
              if providerInfo == 'password'
                email = userInfo['users'][0]['email']
              elsif providerInfo == 'apple.com'
                email = federatedID + '@apple.com'
              elsif providerInfo == 'facebook.com'
                email = federatedID + '@facebook.com'
              else
                email = federatedID + '@gmail.com'
              end
              email
            end

            def findPassword(userInfo)
              providerInfo = userInfo['users'][0]['providerUserInfo'][0]['providerId']
              if providerInfo == 'password'
                password = userInfo['users'][0]['passwordHash']
              else
                password = userInfo['users'][0]['localId']
              end
              password
            end
          end
        end
      end
    end
end