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 SERVICES: any = [
        { name: 'gateway', seed: 3, base: 120 },
        { name: 'auth', seed: 11, base: 85 },
        { name: 'catalog', seed: 19, base: 140 },
        { name: 'search', seed: 27, base: 210 },
        { name: 'cart', seed: 35, base: 95 },
        { name: 'checkout', seed: 43, base: 150 },
        { name: 'payments', seed: 51, base: 180 },
        { name: 'shipping', seed: 59, base: 110 },
        { name: 'notifications', seed: 67, base: 70 },
      ];

  private latency = (seed: any, base: any, degradeFrom: any): any => {
        var rand = this.mulberry32(seed)
        var out = []
        var ts = new Date('01 Jan 2025').getTime()
        var val = base
        for (var i = 0; i < 72; i++) {
          val = Math.max(40, val + (rand() - 0.5) * base * 0.1)
          var v = val
          // checkout degrades in steps after hour 40: the shape you promote to see.
          if (degradeFrom && i >= degradeFrom) {
            v = val + Math.min(320, (i - degradeFrom) * 14)
          }
          out.push([ts, Math.round(v)])
          ts += 3600000 // hourly
        }
        return out
      };

  private latencySeries: any = this.SERVICES.map(function (s) {
        return {
          name: 'p99 latency',
          service: s.name,
          data: this.latency(s.seed, s.base, s.name === 'checkout' ? 40 : 0),
        }
      });

  public chartOptions: Partial<ChartOptions> = {
          series: this.latencySeries,
          chart: {
            id: 'latencyTrellis',
            type: 'line',
            animations: {
              enabled: false,
            },
          },
          trellis: {
            by: 'service',
            minPanelWidth: 250,
            panelHeight: 140,
            gap: 12,
          },
          colors: ['#0891B2'],
          stroke: {
            width: 2,
            curve: 'straight',
          },
          xaxis: {
            type: 'datetime',
          },
          yaxis: {
            labels: {
              formatter: (val) => {
                return Math.round(val) + ' ms'
              },
            },
          },
          dataLabels: {
            enabled: false,
          },
          tooltip: {
            x: {
              format: 'dd MMM HH:mm',
            },
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJleHBpcnlEYXRlIjoiMjEyNi0wNy0wNCIsImlzc3VlRGF0ZSI6IjIwMjYtMDctMjgiLCJwbGFuIjoicHJlbWl1bSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiLCJsb2NhbGhvc3QiXSwic2lnIjoieVBmb1VCc0Z3TU9ZdUEyaEZkR0I2Y1FtZ0JITUtXcVdJSjB2NVRESXRZbFR3eDJMUmh6R2x0RUc3VXJ4X0s3b25ZMWRZb2Z2VGItN01ydFYyNDVyOWcifQ==');
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}