import * as _ from "underscore";
import * as Constants from "./Constants";
import * as DataModels from "../Contracts/DataModels";
import * as HeadersUtility from "./HeadersUtility";
import * as ViewModels from "../Contracts/ViewModels";
import Q from "q";
import {
  ConflictDefinition,
  ContainerDefinition,
  ContainerResponse,
  DatabaseResponse,
  FeedOptions,
  ItemDefinition,
  PartitionKeyDefinition,
  QueryIterator,
  Resource,
  TriggerDefinition
} from "@azure/cosmos";
import { ContainerRequest } from "@azure/cosmos/dist-esm/client/Container/ContainerRequest";
import { client } from "./CosmosClient";
import { DatabaseRequest } from "@azure/cosmos/dist-esm/client/Database/DatabaseRequest";
import { LocalStorageUtility, StorageKey } from "../Shared/StorageUtility";
import { sendCachedDataMessage } from "./MessageHandler";
import { MessageTypes } from "../Contracts/ExplorerContracts";
import { OfferUtils } from "../Utils/OfferUtils";
import { RequestOptions } from "@azure/cosmos/dist-esm";
import StoredProcedure from "../Explorer/Tree/StoredProcedure";
import { Platform, configContext } from "../ConfigContext";
import DocumentId from "../Explorer/Tree/DocumentId";
import ConflictId from "../Explorer/Tree/ConflictId";

export function getCommonQueryOptions(options: FeedOptions): any {
  const storedItemPerPageSetting: number = LocalStorageUtility.getEntryNumber(StorageKey.ActualItemPerPage);
  options = options || {};
  options.populateQueryMetrics = true;
  options.enableScanInQuery = options.enableScanInQuery || true;
  if (!options.partitionKey) {
    options.forceQueryPlan = true;
  }
  options.maxItemCount =
    options.maxItemCount ||
    (storedItemPerPageSetting !== undefined && storedItemPerPageSetting) ||
    Constants.Queries.itemsPerPage;
  options.maxDegreeOfParallelism = LocalStorageUtility.getEntryNumber(StorageKey.MaxDegreeOfParellism);

  return options;
}

export function queryDocuments(
  databaseId: string,
  containerId: string,
  query: string,
  options: any
): Q.Promise<QueryIterator<ItemDefinition & Resource>> {
  options = getCommonQueryOptions(options);
  const documentsIterator = client()
    .database(databaseId)
    .container(containerId)
    .items.query(query, options);
  return Q(documentsIterator);
}

export function readStoredProcedures(
  collection: ViewModels.Collection,
  options?: any
): Q.Promise<DataModels.StoredProcedure[]> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.storedProcedures.readAll(options)
      .fetchAll()
      .then(response => response.resources as DataModels.StoredProcedure[])
  );
}

export function readStoredProcedure(
  collection: ViewModels.Collection,
  requestedResource: DataModels.Resource,
  options?: any
): Q.Promise<DataModels.StoredProcedure> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.storedProcedure(requestedResource.id)
      .read(options)
      .then(response => response.resource as DataModels.StoredProcedure)
  );
}
export function readUserDefinedFunctions(
  collection: ViewModels.Collection,
  options: any
): Q.Promise<DataModels.UserDefinedFunction[]> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.userDefinedFunctions.readAll(options)
      .fetchAll()
      .then(response => response.resources as DataModels.UserDefinedFunction[])
  );
}
export function readUserDefinedFunction(
  collection: ViewModels.Collection,
  requestedResource: DataModels.Resource,
  options?: any
): Q.Promise<DataModels.UserDefinedFunction> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.userDefinedFunction(requestedResource.id)
      .read(options)
      .then(response => response.resource as DataModels.UserDefinedFunction)
  );
}

export function readTriggers(collection: ViewModels.Collection, options: any): Q.Promise<DataModels.Trigger[]> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.triggers.readAll(options)
      .fetchAll()
      .then(response => response.resources as DataModels.Trigger[])
  );
}

export function readTrigger(
  collection: ViewModels.Collection,
  requestedResource: DataModels.Resource,
  options?: any
): Q.Promise<DataModels.Trigger> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.trigger(requestedResource.id)
      .read(options)
      .then(response => response.resource as DataModels.Trigger)
  );
}

export function executeStoredProcedure(
  collection: ViewModels.Collection,
  storedProcedure: StoredProcedure,
  partitionKeyValue: any,
  params: any[]
): Q.Promise<any> {
  // TODO remove this deferred. Kept it because of timeout code at bottom of function
  const deferred = Q.defer<any>();

  client()
    .database(collection.databaseId)
    .container(collection.id())
    .scripts.storedProcedure(storedProcedure.id())
    .execute(partitionKeyValue, params, { enableScriptLogging: true })
    .then(response =>
      deferred.resolve({
        result: response.resource,
        scriptLogs: response.headers[Constants.HttpHeaders.scriptLogResults]
      })
    )
    .catch(error => deferred.reject(error));

  return deferred.promise.timeout(
    Constants.ClientDefaults.requestTimeoutMs,
    `Request timed out while executing stored procedure ${storedProcedure.id()}`
  );
}

export function readDocument(collection: ViewModels.CollectionBase, documentId: DocumentId): Q.Promise<any> {
  const partitionKey = documentId.partitionKeyValue;

  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .item(documentId.id(), partitionKey)
      .read()
      .then(response => response.resource)
  );
}

export function getPartitionKeyHeaderForConflict(conflictId: ConflictId): Object {
  const partitionKeyDefinition: DataModels.PartitionKey = conflictId.partitionKey;
  const partitionKeyValue: any = conflictId.partitionKeyValue;

  return getPartitionKeyHeader(partitionKeyDefinition, partitionKeyValue);
}

export function getPartitionKeyHeader(partitionKeyDefinition: DataModels.PartitionKey, partitionKeyValue: any): Object {
  if (!partitionKeyDefinition) {
    return undefined;
  }

  if (partitionKeyValue === undefined) {
    return [{}];
  }

  return [partitionKeyValue];
}

export function updateCollection(
  databaseId: string,
  collectionId: string,
  newCollection: DataModels.Collection,
  options: any = {}
): Q.Promise<DataModels.Collection> {
  return Q(
    client()
      .database(databaseId)
      .container(collectionId)
      .replace(newCollection as ContainerDefinition, options)
      .then(async (response: ContainerResponse) => {
        return refreshCachedResources().then(() => response.resource as DataModels.Collection);
      })
  );
}

export function updateDocument(
  collection: ViewModels.CollectionBase,
  documentId: DocumentId,
  newDocument: any
): Q.Promise<any> {
  const partitionKey = documentId.partitionKeyValue;

  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .item(documentId.id(), partitionKey)
      .replace(newDocument)
      .then(response => response.resource)
  );
}

export function updateOffer(
  offer: DataModels.Offer,
  newOffer: DataModels.Offer,
  options?: RequestOptions
): Q.Promise<DataModels.Offer> {
  return Q(
    client()
      .offer(offer.id)
      .replace(newOffer, options)
      .then(response => {
        return Promise.all([refreshCachedOffers(), refreshCachedResources()]).then(() => response.resource);
      })
  );
}

export function updateStoredProcedure(
  collection: ViewModels.Collection,
  storedProcedure: DataModels.StoredProcedure,
  options: any
): Q.Promise<DataModels.StoredProcedure> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.storedProcedure(storedProcedure.id)
      .replace(storedProcedure, options)
      .then(response => response.resource as DataModels.StoredProcedure)
  );
}

export function updateUserDefinedFunction(
  collection: ViewModels.Collection,
  userDefinedFunction: DataModels.UserDefinedFunction,
  options?: any
): Q.Promise<DataModels.UserDefinedFunction> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.userDefinedFunction(userDefinedFunction.id)
      .replace(userDefinedFunction, options)
      .then(response => response.resource as DataModels.StoredProcedure)
  );
}

export function updateTrigger(
  collection: ViewModels.Collection,
  trigger: DataModels.Trigger,
  options?: any
): Q.Promise<DataModels.Trigger> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.trigger(trigger.id)
      .replace(trigger as TriggerDefinition, options)
      .then(response => response.resource as DataModels.Trigger)
  );
}

export function createDocument(collection: ViewModels.CollectionBase, newDocument: any): Q.Promise<any> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .items.create(newDocument)
      .then(response => response.resource as DataModels.StoredProcedure)
  );
}

export function createStoredProcedure(
  collection: ViewModels.Collection,
  newStoredProcedure: DataModels.StoredProcedure,
  options?: any
): Q.Promise<DataModels.StoredProcedure> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.storedProcedures.create(newStoredProcedure, options)
      .then(response => response.resource as DataModels.StoredProcedure)
  );
}

export function createUserDefinedFunction(
  collection: ViewModels.Collection,
  newUserDefinedFunction: DataModels.UserDefinedFunction,
  options: any
): Q.Promise<DataModels.UserDefinedFunction> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.userDefinedFunctions.create(newUserDefinedFunction, options)
      .then(response => response.resource as DataModels.UserDefinedFunction)
  );
}

export function createTrigger(
  collection: ViewModels.Collection,
  newTrigger: DataModels.Trigger,
  options?: any
): Q.Promise<DataModels.Trigger> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.triggers.create(newTrigger as TriggerDefinition, options)
      .then(response => response.resource as DataModels.Trigger)
  );
}

export function deleteDocument(collection: ViewModels.CollectionBase, documentId: DocumentId): Q.Promise<any> {
  const partitionKey = documentId.partitionKeyValue;

  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .item(documentId.id(), partitionKey)
      .delete()
  );
}

export function deleteConflict(
  collection: ViewModels.CollectionBase,
  conflictId: ConflictId,
  options: any = {}
): Q.Promise<any> {
  options.partitionKey = options.partitionKey || getPartitionKeyHeaderForConflict(conflictId);

  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .conflict(conflictId.id())
      .delete(options)
  );
}

export function deleteStoredProcedure(
  collection: ViewModels.Collection,
  storedProcedure: DataModels.StoredProcedure,
  options: any
): Q.Promise<any> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.storedProcedure(storedProcedure.id)
      .delete()
  );
}

export function deleteUserDefinedFunction(
  collection: ViewModels.Collection,
  userDefinedFunction: DataModels.UserDefinedFunction,
  options: any
): Q.Promise<any> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.userDefinedFunction(userDefinedFunction.id)
      .delete()
  );
}

export function deleteTrigger(
  collection: ViewModels.Collection,
  trigger: DataModels.Trigger,
  options: any
): Q.Promise<any> {
  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .scripts.trigger(trigger.id)
      .delete()
  );
}

export function readCollectionQuotaInfo(
  collection: ViewModels.Collection,
  options: any
): Q.Promise<DataModels.CollectionQuotaInfo> {
  options = options || {};
  options.populateQuotaInfo = true;
  options.initialHeaders = options.initialHeaders || {};
  options.initialHeaders[Constants.HttpHeaders.populatePartitionStatistics] = true;

  return Q(
    client()
      .database(collection.databaseId)
      .container(collection.id())
      .read(options)
      // TODO any needed because SDK does not properly type response.resource.statistics
      .then((response: any) => {
        let quota: DataModels.CollectionQuotaInfo = HeadersUtility.getQuota(response.headers);
        quota["usageSizeInKB"] = response.resource.statistics.reduce(
          (
            previousValue: number,
            currentValue: DataModels.Statistic,
            currentIndex: number,
            array: DataModels.Statistic[]
          ) => {
            return previousValue + currentValue.sizeInKB;
          },
          0
        );
        quota["numPartitions"] = response.resource.statistics.length;
        quota["uniqueKeyPolicy"] = collection.uniqueKeyPolicy; // TODO: Remove after refactoring (#119617)
        return quota;
      })
  );
}

export function readOffers(options: any): Q.Promise<DataModels.Offer[]> {
  try {
    if (configContext.platform === Platform.Portal) {
      return sendCachedDataMessage<DataModels.Offer[]>(MessageTypes.AllOffers, [
        (<any>window).dataExplorer.databaseAccount().id,
        Constants.ClientDefaults.portalCacheTimeoutMs
      ]);
    }
  } catch (error) {
    // If error getting cached Offers, continue on and read via SDK
  }
  return Q(
    client()
      .offers.readAll()
      .fetchAll()
      .then(response => response.resources)
  );
}

export function readOffer(requestedResource: DataModels.Offer, options: any): Q.Promise<DataModels.OfferWithHeaders> {
  options = options || {};
  options.initialHeaders = options.initialHeaders || {};
  if (!OfferUtils.isOfferV1(requestedResource)) {
    options.initialHeaders[Constants.HttpHeaders.populateCollectionThroughputInfo] = true;
  }

  return Q(
    client()
      .offer(requestedResource.id)
      .read(options)
      .then(response => ({ ...response.resource, headers: response.headers }))
  );
}

export function getOrCreateDatabaseAndCollection(
  request: DataModels.CreateDatabaseAndCollectionRequest,
  options: any
): Q.Promise<DataModels.Collection> {
  const databaseOptions: any = options && _.omit(options, "sharedOfferThroughput");
  const {
    databaseId,
    databaseLevelThroughput,
    collectionId,
    partitionKey,
    indexingPolicy,
    uniqueKeyPolicy,
    offerThroughput,
    analyticalStorageTtl,
    hasAutoPilotV2FeatureFlag
  } = request;

  const createBody: DatabaseRequest = {
    id: databaseId
  };

  // TODO: replace when SDK support autopilot
  const initialHeaders = request.autoPilot
    ? !hasAutoPilotV2FeatureFlag
      ? {
          [Constants.HttpHeaders.autoPilotThroughputSDK]: JSON.stringify({
            maxThroughput: request.autoPilot.maxThroughput
          })
        }
      : {
          [Constants.HttpHeaders.autoPilotTier]: request.autoPilot.autopilotTier
        }
    : undefined;
  if (databaseLevelThroughput) {
    if (request.autoPilot) {
      databaseOptions.initialHeaders = initialHeaders;
    }
    createBody.throughput = offerThroughput;
  }

  return Q(
    client()
      .databases.createIfNotExists(createBody, databaseOptions)
      .then(response => {
        return response.database.containers.create(
          {
            id: collectionId,
            partitionKey: (partitionKey || undefined) as PartitionKeyDefinition,
            indexingPolicy: indexingPolicy ? indexingPolicy : undefined,
            uniqueKeyPolicy: uniqueKeyPolicy ? uniqueKeyPolicy : undefined,
            analyticalStorageTtl: analyticalStorageTtl,
            throughput: databaseLevelThroughput || request.autoPilot ? undefined : offerThroughput
          } as ContainerRequest, // TODO: remove cast when https://github.com/Azure/azure-cosmos-js/issues/423 is fixed
          {
            initialHeaders: databaseLevelThroughput ? undefined : initialHeaders
          }
        );
      })
      .then(containerResponse => containerResponse.resource as DataModels.Collection)
      .finally(() => refreshCachedResources(options))
  );
}

export function createDatabase(
  request: DataModels.CreateDatabaseRequest,
  options: any
): Q.Promise<DataModels.Database> {
  var deferred = Q.defer<DataModels.Database>();

  _createDatabase(request, options).then(
    (createdDatabase: DataModels.Database) => {
      refreshCachedOffers().then(() => {
        deferred.resolve(createdDatabase);
      });
    },
    _createDatabaseError => {
      deferred.reject(_createDatabaseError);
    }
  );

  return deferred.promise;
}

export function refreshCachedOffers(): Q.Promise<void> {
  if (configContext.platform === Platform.Portal) {
    return sendCachedDataMessage(MessageTypes.RefreshOffers, []);
  } else {
    return Q();
  }
}

export function refreshCachedResources(options?: any): Q.Promise<void> {
  if (configContext.platform === Platform.Portal) {
    return sendCachedDataMessage(MessageTypes.RefreshResources, []);
  } else {
    return Q();
  }
}

export function queryConflicts(
  databaseId: string,
  containerId: string,
  query: string,
  options: any
): Q.Promise<QueryIterator<ConflictDefinition & Resource>> {
  const documentsIterator = client()
    .database(databaseId)
    .container(containerId)
    .conflicts.query(query, options);
  return Q(documentsIterator);
}

function _createDatabase(request: DataModels.CreateDatabaseRequest, options: any = {}): Q.Promise<DataModels.Database> {
  const { databaseId, databaseLevelThroughput, offerThroughput, autoPilot, hasAutoPilotV2FeatureFlag } = request;
  const createBody: DatabaseRequest = { id: databaseId };
  const databaseOptions: any = options && _.omit(options, "sharedOfferThroughput");
  // TODO: replace when SDK support autopilot
  const initialHeaders = autoPilot
    ? !hasAutoPilotV2FeatureFlag
      ? {
          [Constants.HttpHeaders.autoPilotThroughputSDK]: JSON.stringify({ maxThroughput: autoPilot.maxThroughput })
        }
      : {
          [Constants.HttpHeaders.autoPilotTier]: autoPilot.autopilotTier
        }
    : undefined;
  if (!!databaseLevelThroughput) {
    if (autoPilot) {
      databaseOptions.initialHeaders = initialHeaders;
    }
    createBody.throughput = offerThroughput;
  }

  return Q(
    client()
      .databases.create(createBody, databaseOptions)
      .then((response: DatabaseResponse) => {
        return refreshCachedResources(databaseOptions).then(() => response.resource);
      })
  );
}