//
// 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 clientPlugin from '@hcengineering/client'
import core, { AccountClient, TxHandler, TxWorkspaceEvent, WorkspaceEvent, createClient } from '@hcengineering/core'
import platform, {
  Severity,
  Status,
  getMetadata,
  getPlugins,
  getResource,
  setPlatformStatus
} from '@hcengineering/platform'
import { connect } from './connection'

export { connect }

// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
export default async () => {
  return {
    function: {
      GetClient: async (
        token: string,
        endpoint: string,
        onUpgrade?: () => void,
        onUnauthorized?: () => void,
        onConnect?: (apply: boolean) => void
      ): Promise<AccountClient> => {
        const filterModel = getMetadata(clientPlugin.metadata.FilterModel) ?? false

        let client = createClient(
          (handler: TxHandler) => {
            const url = new URL(`/${token}`, endpoint)
            console.log('connecting to', url.href)
            const upgradeHandler: TxHandler = (tx) => {
              if (tx?._class === core.class.TxWorkspaceEvent) {
                const event = tx as TxWorkspaceEvent
                if (event.event === WorkspaceEvent.Upgrade) {
                  onUpgrade?.()
                } else if (event.event === WorkspaceEvent.MaintenanceNotification) {
                  void setPlatformStatus(
                    new Status(Severity.WARNING, platform.status.MaintenanceWarning, { time: event.params.timeMinutes })
                  )
                }
              }
              handler(tx)
            }

            return connect(url.href, upgradeHandler, onUpgrade, onUnauthorized, onConnect)
          },
          filterModel ? [...getPlugins(), ...(getMetadata(clientPlugin.metadata.ExtraPlugins) ?? [])] : undefined,
          {
            load: async () => {
              if (typeof localStorage !== 'undefined') {
                const dta = localStorage.getItem('stored_model_' + token) ?? null
                if (dta === null) {
                  return []
                }
                return JSON.parse(dta)
              }
              return []
            },
            store: async (txes) => {
              if (typeof localStorage !== 'undefined') {
                localStorage.setItem('stored_model_' + token, JSON.stringify(txes))
              }
            }
          }
        )
        // Check if we had dev hook for client.
        client = hookClient(client)
        return await client
      }
    }
  }
}
async function hookClient (client: Promise<AccountClient>): Promise<AccountClient> {
  const hook = getMetadata(clientPlugin.metadata.ClientHook)
  if (hook !== undefined) {
    const hookProc = await getResource(hook)
    const _client = client
    client = new Promise((resolve, reject) => {
      _client
        .then((res) => {
          resolve(hookProc(res))
        })
        .catch((err) => reject(err))
    })
  }
  return await client
}