/*
 * Copyright (c) 2016-present Invertase Limited & Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this library except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-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 type {
  DocumentSnapshot,
  DocumentData,
  DocumentReference,
  FirestoreError,
  Query,
  QuerySnapshot,
  SnapshotListenOptions,
  Unsubscribe,
} from '../types/firestore';
import type { ReferenceIsEqualInternal, ReferenceWithOnSnapshotInternal } from '../types/internal';

export { default as DocumentSnapshot } from '../FirestoreDocumentSnapshot';
export { default as QuerySnapshot } from '../FirestoreQuerySnapshot';
export { default as SnapshotMetadata } from '../FirestoreSnapshotMetadata';

export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  reference: DocumentReference<AppModelType, DbModelType>,
  observer: {
    next?: (snapshot: DocumentSnapshot<AppModelType, DbModelType>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
  },
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  reference: DocumentReference<AppModelType, DbModelType>,
  options: SnapshotListenOptions,
  observer: {
    next?: (snapshot: DocumentSnapshot<AppModelType, DbModelType>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
  },
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  reference: DocumentReference<AppModelType, DbModelType>,
  onNext: (snapshot: DocumentSnapshot<AppModelType, DbModelType>) => void,
  onError?: (error: FirestoreError) => void,
  onCompletion?: () => void,
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  reference: DocumentReference<AppModelType, DbModelType>,
  options: SnapshotListenOptions,
  onNext: (snapshot: DocumentSnapshot<AppModelType, DbModelType>) => void,
  onError?: (error: FirestoreError) => void,
  onCompletion?: () => void,
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  query: Query<AppModelType, DbModelType>,
  observer: {
    next?: (snapshot: QuerySnapshot<AppModelType, DbModelType>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
  },
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  query: Query<AppModelType, DbModelType>,
  options: SnapshotListenOptions,
  observer: {
    next?: (snapshot: QuerySnapshot<AppModelType, DbModelType>) => void;
    error?: (error: FirestoreError) => void;
    complete?: () => void;
  },
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  query: Query<AppModelType, DbModelType>,
  onNext: (snapshot: QuerySnapshot<AppModelType, DbModelType>) => void,
  onError?: (error: FirestoreError) => void,
  onCompletion?: () => void,
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  query: Query<AppModelType, DbModelType>,
  options: SnapshotListenOptions,
  onNext: (snapshot: QuerySnapshot<AppModelType, DbModelType>) => void,
  onError?: (error: FirestoreError) => void,
  onCompletion?: () => void,
): Unsubscribe;
export function onSnapshot<
  AppModelType = DocumentData,
  DbModelType extends DocumentData = DocumentData,
>(
  reference: Query<AppModelType, DbModelType> | DocumentReference<AppModelType, DbModelType>,
  ...args: unknown[]
): Unsubscribe {
  const onSnapshotMethod = (reference as unknown as ReferenceWithOnSnapshotInternal).onSnapshot;

  return onSnapshotMethod.call(reference, ...args);
}

export function snapshotEqual<AppModelType, DbModelType extends DocumentData>(
  left: DocumentSnapshot<AppModelType, DbModelType> | QuerySnapshot<AppModelType, DbModelType>,
  right: DocumentSnapshot<AppModelType, DbModelType> | QuerySnapshot<AppModelType, DbModelType>,
): boolean {
  const isEqual = (left as unknown as ReferenceIsEqualInternal).isEqual;
  return isEqual.call(left, right);
}