import {EventEmitter, Injectable} from '@angular/core';
import {ApiService, RawData} from './api.service';

@Injectable({
  providedIn: 'root'
})
export class CacheService {
  public rawValues: number[];
  public rawIndices: string[];
  public loadingProgress: number = 0;

  private _currentTab: number;
  private _query = undefined;
  private _labels = {};
  private _tables;
  private _windowSimilarity;
  private _sliderValue;
  private _queryWindow;
  private _candidates: number[];
  private _parameters: number[];

  public windowSize = 120;
  public nrOfTables = 5;
  public hashSize = 5;
  public stepSize = 200;
  public querySelectionMode = true;
  public distances = [];
  public _dtwdistances: number[] = [];

  public onNewData: EventEmitter<void> = new EventEmitter<void>();
  public onNewSimilarity: EventEmitter<void> = new EventEmitter<void>();
  public onNewLabels: EventEmitter<void> = new EventEmitter<void>();
  public onNewQuery: EventEmitter<void> = new EventEmitter<void>();
  public onNewTables: EventEmitter<void> = new EventEmitter<void>();
  public onNewWindows: EventEmitter<void> = new EventEmitter<void>();
  public onNewTab: EventEmitter<void> = new EventEmitter<void>();
  public onNewSlider: EventEmitter<void> = new EventEmitter<void>();

  constructor(private api: ApiService) {
     this.initialize();
  }

  async initialize(): Promise<void> {
    this.loadingProgress = 0;
    await this.getRawData();
    this.loadingProgress = 50;
    await this.createWindows();
    this.loadingProgress = 100;
  }

  async reset(): Promise<void> {
    this.windowSimilarity = undefined;
    this.loadingProgress = 50;
    await this.createWindows();
    this.loadingProgress = 100;
  }

  async getRawData(): Promise<void> {
    const rawData: RawData = await this.api.readFile();
    this.rawIndices = rawData.index;
    this.rawValues = rawData.values;
    this.onNewData.emit();
  }

  async createWindows(): Promise<void> {
    await this.api.createWindows(this.parameters);
    this.onNewWindows.emit();
  }

  async initial(): Promise<void> {
    const output = await this.api.initialize(this._queryWindow);
    this.dtwdistances = output.distances;
    this.candidates = output.candidates;
    this.createTable();
    this._parameters = output.parameters;
    console.log(output);
  }

  async update(): Promise<void> {
    console.log(this.distances);
    const output = await this.api.update(this._queryWindow, this.distances, this._parameters);
    this.dtwdistances = output.distances;
    this.candidates = output.candidates;
    this.createTable();
    console.log(output);
  }

  async getAverageWindows(windows): Promise<any> {
    return await this.api.getAverageWindows(windows);
  }

  async getQueryWindow(window): Promise<number[]> {
    const output = await this.api.getQueryWindow(window);
    this.distances = output.distances;
    this.queryWindow = output.average;
    return this._queryWindow;
  }

  async getWindow(indices: number[]): Promise<number[][]> {
    return await this.api.getWindow(indices);
  }

  public createTable() {
    const indices = this.dtwdistances.map((x) => x > 500 ? 100 : Math.floor(x / 5));
    const table = {};
    this.candidates.forEach((candidate, index) => {
      if (table[indices[index]] === undefined)
      {
        table[indices[index]] = [];
      }
      table[indices[index]].push(candidate);
    });
    this.tables = table;
  }

  public set dtwdistances(v) {
    this._dtwdistances = v;
  }

  public get dtwdistances(): number[] {
    return this._dtwdistances;
  }

  public set query(v) {
    this._query = v;
  }

  public get query(): number {
    return this._query;
  }

  public get windows(): number[][] {
    return [];
  }

  public set tables(v) {
    this._tables = v;
    this.onNewTables.emit();
  }

  public get tables() {
    return this._tables;
  }

  public set labels(v) {
    this._labels = v;
    this.onNewLabels.emit();
  }

  public get labels() {
    return this._labels;
  }

  public set windowSimilarity(v) {
    this._windowSimilarity = v;
    this.onNewSimilarity.emit();
  }

  public get windowSimilarity() {
    return this._windowSimilarity;
  }

  public set currentTab(v) {
    this._currentTab = v;
    this.onNewTab.emit();
  }

  public get currentTab() {
    return this._currentTab;
  }

  public set sliderValue(v) {
    this._sliderValue = v;
    this.onNewSlider.emit(v);
  }

  public get sliderValue() {
    return this._sliderValue;
  }

  public set queryWindow(v) {
    this._queryWindow = v;
    this.onNewQuery.emit();
  }

  public get queryWindow() {
    return this._queryWindow;
  }

  public set candidates(v) {
    this._candidates = v;
  }

  public get candidates() {
    return this._candidates;
  }

  public get parameters(): {[parameter: string]: any} {
    return {
      windowsize: this.windowSize,
      hashsize: this.hashSize,
      tablesize: this.nrOfTables,
      stepsize: this.stepSize
    };
  }
}