import { Component, AfterViewInit, OnDestroy, ViewChild } from '@angular/core';
import {
  ChartComponent,
  ApexAxisChartSeries,
  ApexNonAxisChartSeries,
  ApexChart,
  ApexXAxis,
  ApexYAxis,
  ApexTitleSubtitle,
  ApexDataLabels,
  ApexStroke,
  ApexFill,
  ApexLegend,
  ApexTooltip,
  ApexMarkers,
  ApexPlotOptions,
  ApexResponsive,
  ApexGrid,
  ApexAnnotations,
  ApexStates,
  ApexTheme,
  NgApexchartsModule,
} from 'ng-apexcharts';

export type ChartOptions = {
  series?: ApexAxisChartSeries | ApexNonAxisChartSeries;
  chart?: ApexChart;
  xaxis?: ApexXAxis;
  yaxis?: ApexYAxis | ApexYAxis[];
  title?: ApexTitleSubtitle;
  subtitle?: ApexTitleSubtitle;
  dataLabels?: ApexDataLabels;
  stroke?: ApexStroke;
  fill?: ApexFill;
  legend?: ApexLegend;
  tooltip?: ApexTooltip;
  markers?: ApexMarkers;
  plotOptions?: ApexPlotOptions;
  responsive?: ApexResponsive[];
  grid?: ApexGrid;
  annotations?: ApexAnnotations;
  states?: ApexStates;
  theme?: ApexTheme;
  colors?: string[];
  labels?: any;
};

@Component({
  selector: 'app-chart',
  standalone: true,
  imports: [NgApexchartsModule],
  templateUrl: './chart.component.html',
})
export class AppChart implements AfterViewInit, OnDestroy {
  @ViewChild('chart') chart!: ChartComponent;
  private mulberry32 = (seed: any): any => {
        return function () {
          seed |= 0
          seed = (seed + 0x6d2b79f5) | 0
          var t = Math.imul(seed ^ (seed >>> 15), 1 | seed)
          t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t
          return ((t ^ (t >>> 14)) >>> 0) / 4294967296
        }
      };

  private onboardingMinutes = (seed: any, mean: any, spread: any, n: any): any => {
        var rand = this.mulberry32(seed)
        var out = []
        for (var i = 0; i < n; i++) {
          var v = mean + (rand() + rand() + rand() - 1.5) * spread
          // A slow tail: some users always wander off mid-setup.
          if (rand() < 0.06) v += rand() * 25
          out.push(Math.max(2, Math.round(v * 10) / 10))
        }
        return out
      };

  private COHORTS: any = [
        { name: 'Jan', seed: 11, mean: 34, spread: 14 },
        { name: 'Feb', seed: 23, mean: 32, spread: 13 },
        { name: 'Mar', seed: 37, mean: 30, spread: 13 },
        { name: 'Apr', seed: 41, mean: 27, spread: 12 },
        { name: 'May', seed: 53, mean: 25, spread: 11 },
        { name: 'Jun', seed: 67, mean: 22, spread: 10 },
        { name: 'Jul', seed: 79, mean: 20, spread: 9 },
        { name: 'Aug', seed: 97, mean: 18, spread: 8 },
      ];

  private cohortSeries: any = this.COHORTS.map(function (c) {
        return {
          name: 'Onboarding time',
          cohort: c.name + ' cohort',
          data: this.onboardingMinutes(c.seed, c.mean, c.spread, 240),
        }
      });

  public chartOptions: Partial<ChartOptions> = {
          series: this.cohortSeries,
          chart: {
            id: 'cohortTrellis',
            type: 'histogram',
            height: 560,
            animations: {
              enabled: false,
            },
          },
          trellis: {
            by: 'cohort',
            columns: 4,
            gap: 12,
          },
          colors: ['#0E7490'],
          plotOptions: {
            histogram: {
              bins: 'auto',
            },
          },
          xaxis: {
            tickAmount: 5,
            labels: {
              rotate: 0,
              formatter: (val) => {
                return Math.round(Number(val)) + 'm'
              },
            },
          },
          dataLabels: {
            enabled: false,
          },
          stroke: {
            width: 1,
            colors: ['#fff'],
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJleHBpcnlEYXRlIjoiMjEyNi0wNy0wNCIsImlzc3VlRGF0ZSI6IjIwMjYtMDctMjgiLCJwbGFuIjoicHJlbWl1bSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiLCJsb2NhbGhvc3QiXSwic2lnIjoieVBmb1VCc0Z3TU9ZdUEyaEZkR0I2Y1FtZ0JITUtXcVdJSjB2NVRESXRZbFR3eDJMUmh6R2x0RUc3VXJ4X0s3b25ZMWRZb2Z2VGItN01ydFYyNDVyOWcifQ==');
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}