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 monthly = (seed: any, base: any, drift: any, vol: 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 < 12; i++) {
          val = Math.max(1, val + drift + (rand() - 0.5) * vol)
          out.push([ts, Math.round(val * 10) / 10])
          ts += 2678400000 // ~1 month
        }
        return out
      };

  private UNITS: any = [
        { unit: 'North America', seed: 3 },
        { unit: 'Europe', seed: 41 },
        { unit: 'APAC', seed: 89 },
      ];

  private metricSeries: any = [];

  public chartOptions: Partial<ChartOptions> = {
          series: this.metricSeries,
          chart: {
            id: 'metricsTrellis',
            type: 'line',
            height: 560,
            animations: {
              enabled: false,
            },
          },
          trellis: {
            row: 'metric',
            column: 'unit',
            gap: 12,
            scales: {
              y: 'independent-row',
            },
            panel: (key) => {
              if (key.indexOf('Revenue') === 0) {
                return {
                  yaxis: {
                    labels: {
                      formatter: function (val) {
                        return '$' + Math.round(val) + 'k'
                      },
                    },
                  },
                }
              }
              if (key.indexOf('Margin') === 0) {
                return {
                  yaxis: {
                    labels: {
                      formatter: function (val) {
                        return Math.round(val) + '%'
                      },
                    },
                  },
                }
              }
              return {
                yaxis: {
                  labels: {
                    formatter: function (val) {
                      return String(Math.round(val))
                    },
                  },
                },
              }
            }   colors: ['#0D9488'],
          stroke: {
            width: 2.5,
            curve: 'straight',
          },
          xaxis: {
            type: 'datetime',
          },
          dataLabels: {
            enabled: false,
          },
          tooltip: {
            x: {
              format: 'MMM yyyy',
            },
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJleHBpcnlEYXRlIjoiMjEyNi0wNy0wNCIsImlzc3VlRGF0ZSI6IjIwMjYtMDctMjgiLCJwbGFuIjoicHJlbWl1bSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiLCJsb2NhbGhvc3QiXSwic2lnIjoieVBmb1VCc0Z3TU9ZdUEyaEZkR0I2Y1FtZ0JITUtXcVdJSjB2NVRESXRZbFR3eDJMUmh6R2x0RUc3VXJ4X0s3b25ZMWRZb2Z2VGItN01ydFYyNDVyOWcifQ==');
    this.UNITS.forEach(function (u, i) {
          this.metricSeries.push({
            name: 'value',
            metric: 'Revenue',
            unit: u.unit,
            data: this.monthly(u.seed, 420 - i * 90, 14 - i * 3, 60),
          })
          this.metricSeries.push({
            name: 'value',
            metric: 'Margin',
            unit: u.unit,
            // Europe's margin erodes: visible only because the row shares a scale.
            data: this.monthly(
              u.seed + 7,
              24 + i * 2,
              u.unit === 'Europe' ? -0.9 : 0.1,
              2.4,
            ),
          })
          this.metricSeries.push({
            name: 'value',
            metric: 'Headcount',
            unit: u.unit,
            data: this.monthly(u.seed + 13, 120 - i * 30, 2, 8),
          })
        })
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}