import { Component, OnInit, ViewChild } from '@angular/core';
import { PlotService, PlotType, PlotRequest, PlotResponse, TagField, FilterDefaults, DataType, YAxisDefinition, AxesTypes, PlotConfig  } from '../plot.service';
import { UntypedFormControl, Validators } from '@angular/forms';
import { MatLegacySnackBar as MatSnackBar } from '@angular/material/legacy-snack-bar';
import { LimitByComponent } from '../limit-by/limit-by.component';
import { YAxisDefinitionComponent } from '../y-axis-definition/y-axis-definition.component';
import { QueryAutocompleteComponent } from '../query-autocomplete/query-autocomplete.component';
import { PlotViewComponent, SelectionRange, DateAnchor } from '../plot-view/plot-view.component';
import { GalleryViewComponent } from '../gallery-view/gallery-view.component';
import * as moment from 'moment';

@Component({
  selector: 'pdb-visualization-page',
  templateUrl: './visualization-page.component.html',
  styleUrls: ['./visualization-page.component.scss']
})
export class VisualizationPageComponent implements OnInit {
  
  readonly DATE_PATTERN = "YYYY-MM-DD HH:mm:ss"; // for moment-JS
  
  dateRange = new UntypedFormControl('2019-10-05 00:00:00 - 2019-10-11 23:59:59');
    
  selectedPlotType = new Array<PlotType>();
  plotTypes: Array<any> = [];
    
  tagFields: Array<TagField> = new Array<TagField>();
  
  groupBy = new Array<TagField>();
  
  @ViewChild('limitbycomponent')
  private limitbycomponent! : LimitByComponent;
  
  
  @ViewChild('y1AxisDefinitionComponent',  { read: YAxisDefinitionComponent })
  private y1AxisDefinitionComponent! : YAxisDefinitionComponent;
  
  @ViewChild('y2AxisDefinitionComponent',  { read: YAxisDefinitionComponent })
  private y2AxisDefinitionComponent! : YAxisDefinitionComponent;
  
  @ViewChild('query')
  query!: QueryAutocompleteComponent;
  
  @ViewChild('plotView')
  plotView!: PlotViewComponent;
  
  @ViewChild('galleryView')
  galleryView!: GalleryViewComponent;
    
  enableGallery = false;
  splitBy : TagField | undefined = undefined;
  y2AxisAvailable = false;
  
  intervalUnit = 'NO_INTERVAL';
  intervalValue = 1;
  renderBarChartTickLabels = false;

  submitterId = crypto.randomUUID();

  plotJobActive = false;

  constructor(private plotService: PlotService, private snackBar: MatSnackBar) {
  }

  showError(message:string) {
    this.snackBar.open(message, "", {
      duration: 5000,
      verticalPosition: 'top'
    });
  }

  ngOnInit() {
    const that = this;

    (<any>window).initDatePicker();

    this.plotTypes = this.plotService.getPlotTypes();
    this.selectedPlotType.push(this.plotTypes[0]);
            
    that.plotService.getFilterDefaults().subscribe(function(filterDefaults: FilterDefaults) {
    
      filterDefaults.fields.forEach(function(name:string) {
        that.tagFields.push(new TagField(name));
      },
      (error: any) => {
        that.showError(error.error.message);
      });
    
      that.groupBy = that.tagFields.filter(val => filterDefaults.groupBy.includes(val.name));
      that.splitBy = that.tagFields.find(val => filterDefaults.splitBy == val.name);
    });
  }

  changePlotType(selectedPlotTypes: Array<PlotType>) {
    const compatiblePlotTypes = this.plotTypes.filter(pt => pt.compatible(selectedPlotTypes));
    this.plotTypes.forEach(pt => pt.active=false);
    compatiblePlotTypes.forEach(pt => pt.active=true);
    
    const axesTypes = this.getAxes();
    this.y2AxisAvailable = axesTypes.y.length == 2;
  }
  
  selectedPlotTypesContains(plotTypeIds: Array<string>){
    return this.selectedPlotType.filter(pt => plotTypeIds.includes(pt.id)).length > 0;
  }
   
  
  dateRangeAsString() : string {
    return (<HTMLInputElement>document.getElementById("search-date-range")).value;
  }
  
  gallery(){
    if (this.splitBy != null){
      this.plotView.imageUrl = '';
      this.plotView.stats = null;
      this.galleryView.show=true;
      const request = this.createPlotRequest();
      this.galleryView.renderGallery(request, this.splitBy.name);
    } else {
      console.error("variable splitBy was null when rendering gallery");
    }
  }
  
  getAxes() : AxesTypes {
    
    const x = new Array<DataType>();
    const y = new Array<DataType>();
    
    for(var i = 0; i < this.selectedPlotType.length; i++){
      var plotType = this.selectedPlotType[i];
      if (!x.includes(plotType.xAxis)) {
        x.push(plotType.xAxis);
      }
      if (!y.includes(plotType.yAxis)) {
        y.push(plotType.yAxis);
      }
    }
    
    return new AxesTypes(x,y);
  }

  abort() {
    this.plotService.abort(this.submitterId).subscribe({
      complete: () => {
        this.plotView.imageUrl = '';
        this.plotView.stats = null;
        this.plotJobActive = false;
        this.showError("Job aborted");
        document.dispatchEvent(new Event("invadersPause", {}));
      }
    });
  }
    
  plot(){
    const that = this;
    
    that.plotView.imageUrl = '';
    that.plotView.stats = null;
    this.plotJobActive = true;
    this.plotView.axes = this.getAxes();
    console.log(JSON.stringify(this.getAxes()));
    that.galleryView.show=false;
    document.dispatchEvent(new Event("invadersStart", {}));
    
    const request = this.createPlotRequest();
    
    this.plotService.sendPlotRequest(request).subscribe({
      next: (plotResponse: PlotResponse) => {
        this.plotView.imageUrl = "http://"+window.location.hostname+':'+window.location.port+'/'+plotResponse.imageUrl;
        this.plotView.stats = plotResponse.stats;
        this.plotJobActive = false;
        document.dispatchEvent(new Event("invadersPause", {}));
      },
      error: (error:any) => {
        console.log(JSON.stringify(error));
        this.plotView.imageUrl = '';
        this.plotView.stats = null;
        this.plotJobActive = false;
        this.showError(error.error.message);
        document.dispatchEvent(new Event("invadersPause", {}));
      }
    });
  }
  
  createPlotRequest(): PlotRequest {
    const aggregates = new Array<string>();
    this.selectedPlotType.forEach(a => aggregates.push(a.id));
    
    const y1 = this.y1AxisDefinitionComponent.getAxisDefinition();
    const y2 = this.y2AxisDefinitionComponent ? this.y2AxisDefinitionComponent.getAxisDefinition() : undefined;
    const results = document.getElementById("results");
    
    const config = new PlotConfig(
      this.query.query,
      this.groupBy.map(o => o.name),
      this.limitbycomponent.limitBy,
      this.limitbycomponent.limit,
      y1,
      y2,
      this.dateRangeAsString(), // dateRange 
      aggregates, // aggregates 
      this.intervalUnit,
      this.intervalValue,
      this.renderBarChartTickLabels, 
    );

    const request = new PlotRequest(
      results != null ? results.offsetHeight-1: 1024,
      results != null ? results.offsetWidth-1 : 1024,
      300, // thumbnailMaxWidth
      200, // thumbnailMaxHeight
      false, // keyOutside
      this.enableGallery, // generateThumbnail
      this.submitterId,
      config);
    return request;
  }
  
  /**
   * Zoom in/out by zoomFaktor, so that the anchorInPercentOfDateRange keeps the same position.
   *
   * shiftDateByAnchor(dateRangeAsString, 0.20, 0.5) zooms in by 50%, so that the date that was at 20% before the zoom is still at 20% after the zoom
   * shiftDateByAnchor(dateRangeAsString, 0.33, 2) zooms out by 50%, so that the date that was at 33% before the zoom is still at 33% after the zoom
   */
  shiftDateByAnchor(dateRange:string, anchorInPercentOfDateRange:number, zoomFactor:number)
  {
      const dateRangeParsed = this.parseDateRange(dateRange);
      const dateRangeInSeconds = dateRangeParsed.duration.asSeconds();
      
      const anchorTimestampInSeconds = dateRangeParsed.startDate.clone().add(Math.floor(dateRangeInSeconds*anchorInPercentOfDateRange), "seconds");
      const newDateRangeInSeconds = dateRangeInSeconds * zoomFactor;
      
      const newStartDate = anchorTimestampInSeconds.clone().subtract(newDateRangeInSeconds*anchorInPercentOfDateRange, "seconds");
      const newEndDate = newStartDate.clone().add({seconds: newDateRangeInSeconds});;
      
      this.setDateRange(newStartDate, newEndDate);
  }
  
  /**
   * Zoom in/out or shift date by adding factorStartDate*dateRangeInSeconds seconds to the start date
   * and factorEndDate*dateRangeInSeconds seconds to the end date.
   * 
   * shiftDate(dateRangeAsString, 0.25, -0.25) will zoom in, making the range half its size
   * shiftDate(dateRangeAsString, -0.5, 0.5) will zoom out, making the range double its size
   * shiftDate(dateRangeAsString, -0.5, -0.5) will move the range by half its size to older values
   * shiftDate(dateRangeAsString, 1, 1) will move the range by its size to newer values
   */
  shiftDate(dateRange: string, factorStartDate: number, factorEndDate: number)
  {
      const dateRangeParsed = this.parseDateRange(dateRange);
      const dateRangeInSeconds = dateRangeParsed.duration.asSeconds();
      
      const newStartDate = dateRangeParsed.startDate.add({seconds: dateRangeInSeconds*factorStartDate});
      const newEndDate = dateRangeParsed.endDate.add({seconds: dateRangeInSeconds*factorEndDate});
      
      this.setDateRange(newStartDate, newEndDate);
  }
  
  parseDateRange(dateRangeAsString : string) : DateRange {
    const startDate = moment(dateRangeAsString.slice(0, 19));
    const endDate = moment(dateRangeAsString.slice(22, 41));
    
    return {
      startDate: startDate,
      endDate: endDate,
      duration: moment.duration(endDate.diff(startDate))
    };
  }
  
  setDateRange(startDate: any, endDate: any) {
    const formattedStartDate = startDate.format(this.DATE_PATTERN);
    const formattedEndDate = endDate.format(this.DATE_PATTERN);
    
    const newDateRange = formattedStartDate+" - "+formattedEndDate;
    
    (<HTMLInputElement>document.getElementById("search-date-range")).value = newDateRange;
    this.plot();
  }
  
  zoomRange(range: SelectionRange) {
    this.shiftDate(this.dateRangeAsString(), range.startPercentOfDateRange, range.endPercentOfDateRange-1);
  }
  
  zoomWithDateAnchor(dateAnchor: DateAnchor){
    this.shiftDateByAnchor(this.dateRangeAsString(), dateAnchor.cursorPercentOfDateRange, dateAnchor.zoomFactor);
  }

}

export class DateRange {
  startDate: any;
  endDate: any;
  duration: any;
}

/*
export class AxesUsed {
  x1: DataType;
  y1: DataType;
  x2: DataType;
  y2: DataType;
}
*/