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 channel = (seed: any, base: any, spread: any): any => {
          var rand = this.mulberry32(seed)
          var series = []
          var ts = new Date('01 Jun 2025 GMT').getTime()
          var val = base
          for (var i = 0; i < 20; i++) {
            val += (rand() - 0.5) * spread
            val += (base - val) * 0.15
            series.push([ts, Math.max(2, Math.round(val))])
            ts += 86400000
          }
          return series
        };

  public chartOptions: Partial<ChartOptions> = {
          series: [
            {
              name: 'Organic Search',
              data: this.channel(11, 42, 14),
            },
            {
              name: 'Direct',
              data: this.channel(23, 26, 9),
            },
            {
              name: 'Social',
              data: this.channel(35, 15, 8),
            },
          ],
          chart: {
            type: 'area',
            height: 350,
            stacked: true,
            events: {
              selection: (chart, e) => {
                console.log(new Date(e.xaxis.min))
              },
            },
          },
          colors: ['#008FFB', '#00E396', '#FEB019'],
          dataLabels: {
            enabled: false,
          },
          stroke: {
            curve: 'monotoneCubic',
          },
          title: {
            text: 'Website Visits by Channel',
            align: 'left',
          },
          fill: {
            type: 'gradient',
            gradient: {
              opacityFrom: 0.6,
              opacityTo: 0.8,
            },
          },
          legend: {
            position: 'top',
            horizontalAlign: 'left',
          },
          yaxis: {
            labels: {
              formatter: (val) => {
                return val + 'k'
              },
            },
          },
          xaxis: {
            type: 'datetime',
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJpc3N1ZURhdGUiOiIyMDI2LTA0LTE2IiwiZXhwaXJ5RGF0ZSI6IjIwNTItMDQtMTciLCJwbGFuIjoiZW50ZXJwcmlzZSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiXX0=');
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}