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;

  public windowSize = 500;
  public nrOfTables = 10;
  public hashSize = 5;
  public stepSize = 1;
  public querySelectionMode = true;

  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 = 30;
    await this.createWindows();
    this.loadingProgress = 60;
    await this.createTables();
    this.loadingProgress = 100;
  }

  async reset(): Promise<void> {
    this.windowSimilarity = undefined;
    this.loadingProgress = 30;
    await this.createWindows();
    this.loadingProgress = 60;
    await this.createTables();
    this.loadingProgress = 100;
  }

  async getRawData(): Promise<void> {
    const channels = await this.api.readMtsFile();
    console.log(channels);
    this.rawIndices = channels.map((channel) => channel.index);
    this.rawValues = channels.map((channel) => channel.values);
    this.onNewData.emit();
  }

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

  async createTables(): Promise<void> {
    this.tables = await this.api.createTables(this.parameters);
  }

  async getSimilarWindows(): Promise<any> {
    this.windowSimilarity = await this.api.getSimilarWindows(this._queryWindow, this.tables);
    return this.windowSimilarity;
  }

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

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

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

  async updateTables(): Promise<void> {
    this.tables = await this.api.updateTables(this.queryWindow, this.labels, this.tables, this.parameters);
  }

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