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 = (a: any): any => {
          return function () {
            a |= 0
            a = (a + 0x6d2b79f5) | 0
            var t = Math.imul(a ^ (a >>> 15), 1 | a)
            t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t
            return ((t ^ (t >>> 14)) >>> 0) / 4294967296
          }
        };

  private rng: any = this.mulberry32(1357924680);

  private gauss = (mean: any, sd: any): any => {
          var u = 0,
            v = 0
          while (u === 0) u = this.rng()
          while (v === 0) v = this.rng()
          return mean + sd * Math.sqrt(-2 * Math.log(u)) * Math.cos(2 * Math.PI * v)
        };

  private sample = (n: any, mean: any, sd: any): any => {
          var out = []
          for (var i = 0; i < n; i++) {
            out.push(Math.round(this.gauss(mean, sd) * 10) / 10)
          }
          return out
        };

  private MONTHS: any = [
          ['Jan', 4, 3],
          ['Feb', 6, 3],
          ['Mar', 11, 3.5],
          ['Apr', 15, 4],
          ['May', 20, 4],
          ['Jun', 24, 4],
          ['Jul', 27, 3.5],
          ['Aug', 26, 3.5],
          ['Sep', 21, 4],
          ['Oct', 15, 4.5],
          ['Nov', 9, 3.5],
          ['Dec', 5, 3],
        ].map(function (m) {
          return { name: m[0], data: this.sample(110, m[1], m[2]) }
        });

  private kde = (values: any, bw: any): any => {
          var min = Math.min.apply(null, values) - bw
          var max = Math.max.apply(null, values) + bw
          var N = values.length
          var profile = []
          for (var x = min; x <= max; x += 0.4) {
            var sum = 0
            for (var k = 0; k < N; k++) {
              var d = (x - values[k]) / bw
              sum += Math.exp(-0.5 * d * d)
            }
            profile.push([Math.round(x * 100) / 100, sum / (N * bw)])
          }
          return profile
        };

  private COLOR_RAMP: any = ['#2c7bb6', '#abd9e9', '#ffffbf', '#fdae61', '#d7191c'];

  public chartOptions: Partial<ChartOptions> = {
          series: [
            {
              name: 'Temperature',
              data: this.MONTHS.map(function (m) {
                return {
                  x: m.name,
                  y: { density: this.kde(m.data, 1.5), points: m.data },
                }
              }),
            },
          ],
          chart: {
            type: 'violin',
            height: 560,
          },
          title: {
            text: 'Afternoon temperature through the year — dots coloured by value',
          },
          // muted grey violins so the colour-graded dots are the focus
          colors: ['#b8c4cc'],
          stroke: { width: 1, colors: ['#90a4ae'] },
          fill: { opacity: 0.6 },
          legend: { show: false },
          yaxis: {
            title: { text: 'Temperature (°C)' },
          },
          plotOptions: {
            violin: {
              points: {
                show: true,
                size: 5,
                jitter: 0.8,
                opacity: 1,
                strokeColor: '#fff',
                strokeWidth: 1,
                // colour each observation by its value along the ramp
                colorScale: { colors: this.COLOR_RAMP, min: 0, max: 32 },
              },
            },
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJpc3N1ZURhdGUiOiIyMDI2LTA0LTE2IiwiZXhwaXJ5RGF0ZSI6IjIwNTItMDQtMTciLCJwbGFuIjoiZW50ZXJwcmlzZSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiXX0=');
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}