//
// Copyright © 2020 Anticrm Platform Contributors.
//
// Licensed under the Eclipse Public 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 https://www.eclipse.org/legal/epl-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.
//

import { createClient, Client, TxHander } from '@anticrm/core'
import { getMetadata } from '@anticrm/platform'
import clientPlugin from '@anticrm/client'

import { connect } from './connection'

/*!
 * Anticrm Platform™ Client Dev Plugin
 * © 2020 Anticrm Platform Contributors. All Rights Reserved.
 * Licensed under the Eclipse Public License, Version 2.0
 */
// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
export default async () => {
  let client: Client | undefined

  return {
    function: {
      GetClient: async (): Promise<Client> => {
        if (client === undefined) {
          const url = getMetadata(clientPlugin.metadata.ClientUrl)
          if (url === undefined) {
            throw new Error('no app server url provided.')
          }
          return await createClient((handler: TxHander) => {
            return connect(url, handler)
          })
        }
        return client
      }
    }
  }
}