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 BACKEND: any = {
          '2023-q': [
            { x: 'Q1', y: 21 },
            { x: 'Q2', y: 28 },
            { x: 'Q3', y: 24 },
            { x: 'Q4', y: 27 },
          ],
          '2024-q': [
            { x: 'Q1', y: 33 },
            { x: 'Q2', y: 41 },
            { x: 'Q3', y: 36 },
            { x: 'Q4', y: 40 },
          ],
          '2025-q': [
            { x: 'Q1', y: 44 },
            { x: 'Q2', y: 52 },
            { x: 'Q3', y: 48 },
            { x: 'Q4', y: 56 },
          ],
        };

  private failNext: any = false;

  private fakeFetch = (id: any): any => {
          return new Promise(function (resolve, reject) {
            window.setTimeout(function () {
              if (this.failNext) {
                reject(new Error('Request failed (simulated)'))
                return
              }
              var rows = this.BACKEND[id]
              if (!rows) {
                reject(new Error('No level "' + id + '"'))
                return
              }
              resolve({ id: id, name: id.replace('-q', ' by quarter'), data: rows })
            }, 700)
          })
        };

  private setStatus = (text: any, isError: any): any => {
          var el = document.querySelector('#status')
          if (!el) return
          el.textContent = text || ''
          el.className = isError ? 'status error' : 'status'
        };

  public chartOptions: Partial<ChartOptions> = {
          series: [
            {
              name: 'Revenue',
              data: [
                { x: '2023', y: 100, drilldown: '2023-q' },
                { x: '2024', y: 150, drilldown: '2024-q' },
                { x: '2025', y: 200, drilldown: '2025-q' },
              ],
            },
          ],
          chart: {
            id: 'asyncDrill',
            type: 'bar',
            height: 400,
            toolbar: {
              show: false,
            },
          },
          plotOptions: {
            bar: {
              distributed: true,
              columnWidth: '50%',
              borderRadius: 6,
              borderRadiusApplication: 'end',
            },
          },
          legend: {
            show: false,
          },
          dataLabels: {
            enabled: false,
          },
          drilldown: {
            enabled: true,
            // Deliberately empty: every level below the root comes from onDrillDown.
            series: [],
            breadcrumb: {
              show: true,
              rootLabel: 'All years',
            },
            loading: {
              show: true,
            },
            cache: true,
          },
        };
  ngAfterViewInit() {
    (window as any).ApexCharts.setLicense('APEX-eyJleHBpcnlEYXRlIjoiMjEyNi0wNy0wNCIsImlzc3VlRGF0ZSI6IjIwMjYtMDctMjgiLCJwbGFuIjoicHJlbWl1bSIsImRvbWFpbnMiOlsiYXBleGNoYXJ0cy5jb20iLCIxMjcuMC4wLjEiLCJsb2NhbGhvc3QiXSwic2lnIjoieVBmb1VCc0Z3TU9ZdUEyaEZkR0I2Y1FtZ0JITUtXcVdJSjB2NVRESXRZbFR3eDJMUmh6R2x0RUc3VXJ4X0s3b25ZMWRZb2Z2VGItN01ydFYyNDVyOWcifQ==');

    function fakeFetch(id) {
            return new Promise(function (resolve, reject) {
              window.setTimeout(() => {
                if (this.failNext) {
                  reject(new Error('Request failed (simulated)'))
                  return
                }
                var rows = this.BACKEND[id]
                if (!rows) {
                  reject(new Error('No level "' + id + '"'))
                  return
                }
                resolve({ id: id, name: id.replace('-q', ' by quarter'), data: rows })
              }, 700)
            })
          }
    this.chart.updateOptions({
            drilldown: {
              onDrillDown: (ctx) => {
                this.setStatus('Fetching ' + ctx.id + '...')
                return this.fakeFetch(ctx.id)
              },
            },
          })
    this.chart.addEventListener('drillDownEnd', () => {
            this.setStatus('')
          })
    this.chart.addEventListener('drillDownError', (info) => {
            this.setStatus(String(info.error && info.error.message), true)
          })
    document.querySelector('#up')?.addEventListener('click', () => {
            this.chart.drillUp()
          })
    document.querySelector('#clear-cache')?.addEventListener('click', () => {
            this.chart.clearDrilldownCache()
            this.setStatus('Cache cleared - the next drill will refetch.')
          })
    document.querySelector('#fail')?.addEventListener('change', (e) => {
            this.failNext = e.target.checked
          })
  }

  ngOnDestroy() {
    // no cleanup needed
  }
}