import { Resource, StoredProcedureDefinition } from "@azure/cosmos";
import * as ko from "knockout";
import * as Constants from "../../Common/Constants";
import { deleteStoredProcedure } from "../../Common/dataAccess/deleteStoredProcedure";
import { executeStoredProcedure } from "../../Common/dataAccess/executeStoredProcedure";
import * as ViewModels from "../../Contracts/ViewModels";
import { Action, ActionModifiers } from "../../Shared/Telemetry/TelemetryConstants";
import * as TelemetryProcessor from "../../Shared/Telemetry/TelemetryProcessor";
import Explorer from "../Explorer";
import StoredProcedureTab from "../Tabs/StoredProcedureTab";
import TabsBase from "../Tabs/TabsBase";
import { getErrorMessage } from "../../Common/ErrorHandlingUtils";

const sampleStoredProcedureBody: string = `// SAMPLE STORED PROCEDURE
function sample(prefix) {
    var collection = getContext().getCollection();

    // Query documents and take 1st item.
    var isAccepted = collection.queryDocuments(
        collection.getSelfLink(),
        'SELECT * FROM root r',
    function (err, feed, options) {
        if (err) throw err;

        // Check the feed and if empty, set the body to 'no docs found', 
        // else take 1st element from feed
        if (!feed || !feed.length) {
            var response = getContext().getResponse();
            response.setBody('no docs found');
        }
        else {
            var response = getContext().getResponse();
            var body = { prefix: prefix, feed: feed[0] };
            response.setBody(JSON.stringify(body));
        }
    });

    if (!isAccepted) throw new Error('The query was not accepted by the server.');
}`;

export default class StoredProcedure {
  public nodeKind: string;
  public container: Explorer;
  public collection: ViewModels.Collection;
  public self: string;
  public rid: string;
  public id: ko.Observable<string>;
  public body: ko.Observable<string>;
  public isExecuteEnabled: boolean;

  constructor(container: Explorer, collection: ViewModels.Collection, data: StoredProcedureDefinition & Resource) {
    this.nodeKind = "StoredProcedure";
    this.container = container;
    this.collection = collection;
    this.self = data._self;
    this.rid = data._rid;
    this.id = ko.observable(data.id);
    this.body = ko.observable(data.body as string);
    this.isExecuteEnabled = this.container.isFeatureEnabled(Constants.Features.executeSproc);
  }

  public static create(source: ViewModels.Collection, event: MouseEvent) {
    const id = source.container.tabsManager.getTabs(ViewModels.CollectionTabKind.StoredProcedures).length + 1;
    const storedProcedure = <StoredProcedureDefinition>{
      id: "",
      body: sampleStoredProcedureBody,
    };

    const storedProcedureTab: StoredProcedureTab = new StoredProcedureTab({
      resource: storedProcedure,
      isNew: true,
      tabKind: ViewModels.CollectionTabKind.StoredProcedures,
      title: `New Stored Procedure ${id}`,
      tabPath: `${source.databaseId}>${source.id()}>New Stored Procedure ${id}`,
      collection: source,
      node: source,
      hashLocation: `${Constants.HashRoutePrefixes.collectionsWithIds(source.databaseId, source.id())}/sproc`,
      isActive: ko.observable(false),
      onUpdateTabsButtons: source.container.onUpdateTabsButtons,
    });

    source.container.tabsManager.activateNewTab(storedProcedureTab);
  }

  public select() {
    this.container.selectedNode(this);
    TelemetryProcessor.trace(Action.SelectItem, ActionModifiers.Mark, {
      description: "Stored procedure node",

      dataExplorerArea: Constants.Areas.ResourceTree,
    });
  }

  public open = () => {
    this.select();

    const storedProcedureTabs: StoredProcedureTab[] = this.container.tabsManager.getTabs(
      ViewModels.CollectionTabKind.StoredProcedures,
      (tab: TabsBase) => tab.node && tab.node.rid === this.rid
    ) as StoredProcedureTab[];
    let storedProcedureTab: StoredProcedureTab = storedProcedureTabs && storedProcedureTabs[0];

    if (storedProcedureTab) {
      this.container.tabsManager.activateTab(storedProcedureTab);
    } else {
      const storedProcedureData = <StoredProcedureDefinition>{
        _rid: this.rid,
        _self: this.self,
        id: this.id(),
        body: this.body(),
      };

      storedProcedureTab = new StoredProcedureTab({
        resource: storedProcedureData,
        isNew: false,
        tabKind: ViewModels.CollectionTabKind.StoredProcedures,
        title: storedProcedureData.id,
        tabPath: `${this.collection.databaseId}>${this.collection.id()}>${storedProcedureData.id}`,
        collection: this.collection,
        node: this,
        hashLocation: `${Constants.HashRoutePrefixes.collectionsWithIds(
          this.collection.databaseId,
          this.collection.id()
        )}/sprocs/${this.id()}`,
        isActive: ko.observable(false),
        onUpdateTabsButtons: this.container.onUpdateTabsButtons,
      });

      this.container.tabsManager.activateNewTab(storedProcedureTab);
    }
  };

  public delete() {
    if (!window.confirm("Are you sure you want to delete the stored procedure?")) {
      return;
    }

    deleteStoredProcedure(this.collection.databaseId, this.collection.id(), this.id()).then(
      () => {
        this.container.tabsManager.removeTabByComparator((tab: TabsBase) => tab.node && tab.node.rid === this.rid);
        this.collection.children.remove(this);
      },
      (reason) => {}
    );
  }

  public execute(params: string[], partitionKeyValue?: string): void {
    const sprocTabs = this.container.tabsManager.getTabs(
      ViewModels.CollectionTabKind.StoredProcedures,
      (tab: TabsBase) => tab.node && tab.node.rid === this.rid
    ) as StoredProcedureTab[];
    const sprocTab = sprocTabs && sprocTabs.length > 0 && sprocTabs[0];
    sprocTab.isExecuting(true);
    this.container &&
      executeStoredProcedure(this.collection, this, partitionKeyValue, params)
        .then(
          (result: any) => {
            sprocTab.onExecuteSprocsResult(result, result.scriptLogs);
          },
          (error: any) => {
            sprocTab.onExecuteSprocsError(getErrorMessage(error));
          }
        )
        .finally(() => {
          sprocTab.isExecuting(false);
          this.onFocusAfterExecute();
        });
  }

  public onFocusAfterExecute(): void {
    const focusElement = document.getElementById("execute-storedproc-toggles");
    focusElement && focusElement.focus();
  }
}