import * as Sequelize from 'sequelize'
import * as uuidv4 from 'uuid/v4'
import { ActivityPubActorType } from '../../shared/models/activitypub'
import { sequelizeTypescript, SERVER_ACTOR_NAME } from '../initializers'
import { AccountModel } from '../models/account/account'
import { UserModel } from '../models/account/user'
import { buildActorInstance, getAccountActivityPubUrl, setAsyncActorKeys } from './activitypub'
import { createVideoChannel } from './video-channel'
import { VideoChannelModel } from '../models/video/video-channel'
import { FilteredModelAttributes } from 'sequelize-typescript/lib/models/Model'
import { ActorModel } from '../models/activitypub/actor'

async function createUserAccountAndChannel (userToCreate: UserModel, validateUser = true) {
  const { user, account, videoChannel } = await sequelizeTypescript.transaction(async t => {
    const userOptions = {
      transaction: t,
      validate: validateUser
    }

    const [ userCreated, accountCreated ] = await Promise.all([
      userToCreate.save(userOptions),
      createLocalAccountWithoutKeys(userToCreate.username, userToCreate.id, null, t)
    ])
    userCreated.Account = accountCreated

    let channelName = userCreated.username + '_channel'

    // Conflict, generate uuid instead
    const actor = await ActorModel.loadLocalByName(channelName)
    if (actor) channelName = uuidv4()

    const videoChannelDisplayName = `Main ${userCreated.username} channel`
    const videoChannelInfo = {
      name: channelName,
      displayName: videoChannelDisplayName
    }
    const videoChannel = await createVideoChannel(videoChannelInfo, accountCreated, t)

    return { user: userCreated, account: accountCreated, videoChannel }
  })

  const [ accountKeys, channelKeys ] = await Promise.all([
    setAsyncActorKeys(account.Actor),
    setAsyncActorKeys(videoChannel.Actor)
  ])

  account.Actor = accountKeys
  videoChannel.Actor = channelKeys

  return { user, account, videoChannel } as { user: UserModel, account: AccountModel, videoChannel: VideoChannelModel }
}

async function createLocalAccountWithoutKeys (
  name: string,
  userId: number | null,
  applicationId: number | null,
  t: Sequelize.Transaction | undefined,
  type: ActivityPubActorType= 'Person'
) {
  const url = getAccountActivityPubUrl(name)

  const actorInstance = buildActorInstance(type, url, name)
  const actorInstanceCreated = await actorInstance.save({ transaction: t })

  const accountInstance = new AccountModel({
    name,
    userId,
    applicationId,
    actorId: actorInstanceCreated.id
  } as FilteredModelAttributes<AccountModel>)

  const accountInstanceCreated = await accountInstance.save({ transaction: t })
  accountInstanceCreated.Actor = actorInstanceCreated

  return accountInstanceCreated
}

async function createApplicationActor (applicationId: number) {
  const accountCreated = await createLocalAccountWithoutKeys(SERVER_ACTOR_NAME, null, applicationId, undefined, 'Application')

  accountCreated.Actor = await setAsyncActorKeys(accountCreated.Actor)

  return accountCreated
}

// ---------------------------------------------------------------------------

export {
  createApplicationActor,
  createUserAccountAndChannel,
  createLocalAccountWithoutKeys
}