import { DocumentUpdate, Hierarchy, MixinData, MixinUpdate, ModelDb } from '.'
import type { Account, AttachedData, AttachedDoc, Class, Data, Doc, Mixin, PropertyType, Ref, Space } from './classes'
import { Client } from './client'
import core from './component'
import type { DocumentQuery, FindOptions, FindResult, TxResult, WithLookup } from './storage'
import { Tx, TxFactory } from './tx'

/**
 * @public
 *
 * High Level operations with client, will create low level transactions.
 *
 * `notify` is not supported by TxOperations.
 */
export class TxOperations implements Omit<Client, 'notify'> {
  readonly txFactory: TxFactory

  constructor (protected readonly client: Client, user: Ref<Account>) {
    this.txFactory = new TxFactory(user)
  }

  getHierarchy (): Hierarchy {
    return this.client.getHierarchy()
  }

  getModel (): ModelDb {
    return this.client.getModel()
  }

  async close (): Promise<void> {
    return await this.client.close()
  }

  findAll<T extends Doc>(
    _class: Ref<Class<T>>,
    query: DocumentQuery<T>,
    options?: FindOptions<T> | undefined
  ): Promise<FindResult<T>> {
    return this.client.findAll(_class, query, options)
  }

  findOne<T extends Doc>(
    _class: Ref<Class<T>>,
    query: DocumentQuery<T>,
    options?: FindOptions<T> | undefined
  ): Promise<WithLookup<T> | undefined> {
    return this.client.findOne(_class, query, options)
  }

  tx (tx: Tx): Promise<TxResult> {
    return this.client.tx(tx)
  }

  async createDoc<T extends Doc>(
    _class: Ref<Class<T>>,
    space: Ref<Space>,
    attributes: Data<T>,
    id?: Ref<T>
  ): Promise<Ref<T>> {
    const tx = this.txFactory.createTxCreateDoc(_class, space, attributes, id)
    await this.client.tx(tx)
    return tx.objectId
  }

  async addCollection<T extends Doc, P extends AttachedDoc>(
    _class: Ref<Class<P>>,
    space: Ref<Space>,
    attachedTo: Ref<T>,
    attachedToClass: Ref<Class<T>>,
    collection: string,
    attributes: AttachedData<P>,
    id?: Ref<P>
  ): Promise<Ref<P>> {
    const tx = this.txFactory.createTxCollectionCUD<T, P>(
      attachedToClass,
      attachedTo,
      space,
      collection,
      this.txFactory.createTxCreateDoc<P>(_class, space, attributes as unknown as Data<P>, id)
    )
    await this.client.tx(tx)
    return tx.tx.objectId as unknown as Ref<P>
  }

  async updateCollection<T extends Doc, P extends AttachedDoc>(
    _class: Ref<Class<P>>,
    space: Ref<Space>,
    objectId: Ref<P>,
    attachedTo: Ref<T>,
    attachedToClass: Ref<Class<T>>,
    collection: string,
    operations: DocumentUpdate<P>,
    retrieve?: boolean
  ): Promise<Ref<T>> {
    const tx = this.txFactory.createTxCollectionCUD(
      attachedToClass,
      attachedTo,
      space,
      collection,
      this.txFactory.createTxUpdateDoc(_class, space, objectId, operations, retrieve)
    )
    await this.client.tx(tx)
    return tx.objectId
  }

  async removeCollection<T extends Doc, P extends AttachedDoc>(
    _class: Ref<Class<P>>,
    space: Ref<Space>,
    objectId: Ref<P>,
    attachedTo: Ref<T>,
    attachedToClass: Ref<Class<T>>,
    collection: string
  ): Promise<Ref<T>> {
    const tx = this.txFactory.createTxCollectionCUD(
      attachedToClass,
      attachedTo,
      space,
      collection,
      this.txFactory.createTxRemoveDoc(_class, space, objectId)
    )
    await this.client.tx(tx)
    return tx.objectId
  }

  putBag<P extends PropertyType>(
    _class: Ref<Class<Doc>>,
    space: Ref<Space>,
    objectId: Ref<Doc>,
    bag: string,
    key: string,
    value: P
  ): Promise<TxResult> {
    const tx = this.txFactory.createTxPutBag(_class, space, objectId, bag, key, value)
    return this.client.tx(tx)
  }

  updateDoc<T extends Doc>(
    _class: Ref<Class<T>>,
    space: Ref<Space>,
    objectId: Ref<T>,
    operations: DocumentUpdate<T>,
    retrieve?: boolean
  ): Promise<TxResult> {
    const tx = this.txFactory.createTxUpdateDoc(_class, space, objectId, operations, retrieve)
    return this.client.tx(tx)
  }

  removeDoc<T extends Doc>(_class: Ref<Class<T>>, space: Ref<Space>, objectId: Ref<T>): Promise<TxResult> {
    const tx = this.txFactory.createTxRemoveDoc(_class, space, objectId)
    return this.client.tx(tx)
  }

  createMixin<D extends Doc, M extends D>(
    objectId: Ref<D>,
    objectClass: Ref<Class<D>>,
    objectSpace: Ref<Space>,
    mixin: Ref<Mixin<M>>,
    attributes: MixinData<D, M>
  ): Promise<TxResult> {
    const tx = this.txFactory.createTxMixin(objectId, objectClass, objectSpace, mixin, attributes)
    return this.client.tx(tx)
  }

  updateMixin<D extends Doc, M extends D>(
    objectId: Ref<D>,
    objectClass: Ref<Class<D>>,
    objectSpace: Ref<Space>,
    mixin: Ref<Mixin<M>>,
    attributes: MixinUpdate<D, M>
  ): Promise<TxResult> {
    const tx = this.txFactory.createTxMixin(objectId, objectClass, objectSpace, mixin, attributes)
    return this.client.tx(tx)
  }

  update<T extends Doc>(doc: T, update: DocumentUpdate<T>, retrieve?: boolean): Promise<TxResult> {
    if (this.client.getHierarchy().isDerived(doc._class, core.class.AttachedDoc)) {
      const adoc = doc as unknown as AttachedDoc
      return this.updateCollection(
        doc._class,
        doc.space,
        adoc._id,
        adoc.attachedTo,
        adoc.attachedToClass,
        adoc.collection,
        update,
        retrieve
      )
    }
    return this.updateDoc(doc._class, doc.space, doc._id, update, retrieve)
  }

  remove<T extends Doc>(doc: T): Promise<TxResult> {
    if (this.client.getHierarchy().isDerived(doc._class, core.class.AttachedDoc)) {
      const adoc = doc as unknown as AttachedDoc
      return this.removeCollection(
        doc._class,
        doc.space,
        adoc._id,
        adoc.attachedTo,
        adoc.attachedToClass,
        adoc.collection
      )
    }
    return this.removeDoc(doc._class, doc.space, doc._id)
  }
}