import { Component, Input, OnInit, ViewChild } from '@angular/core';
import { ChartOptions, ChartType, ChartDataSets } from 'chart.js';
import { Label, SingleDataSet } from 'ng2-charts';
import * as pluginDataLabels from 'chartjs-plugin-datalabels';

@Component({
  selector: 'sl-bar-chart',
  templateUrl: './bar-chart.component.html',
  styleUrls: ['./bar-chart.component.css'],
})
export class BarChartComponent implements OnInit {
  @Input() data;
  @Input() questionNumber;
  @ViewChild('chartRootElement') chartRootElement;
  @ViewChild('chartCanvas') chartCanvas;
  public barChartOptions: ChartOptions = {
    responsive: true,
    maintainAspectRatio: true,
    scales: {
      xAxes: [
        {
          ticks: {
            min: 0, // Edit the value according to what you need,
            max: 100,
          },
          scaleLabel: {
            display: true,
            labelString: 'Response in %',
          },
        },
      ],
      yAxes: [
        {
          ticks: {
            callback: function (value: any, index, values) {
              // // return createSubstrArr(value, 5) || value;
              let strArr = value.split(' ');
              let tempString = '';
              let result = [];
              for (let x = 0; x < strArr.length; x++) {
                tempString += ' ' + strArr[x];
                if ((x % 4 === 0 && x !== 0) || x == strArr.length - 1) {
                  tempString = tempString.slice(1);
                  result.push(tempString);
                  tempString = '';
                }
              }
              return result || value;
            },
            fontSize: 15,
          },
          display: true,

          scaleLabel: {
            display: true,
            labelString: 'Response',
          },
        },
      ],
    },
  };
  public barChartLabels: Label[];
  public barChartType: ChartType = 'horizontalBar';
  public barChartLegend = false;
  public chartColors: Array<any>;

  public barChartData: ChartDataSets[];
  public barChartPlugins = [pluginDataLabels];
  constructor() {}

  ngOnInit() {
    this.barChartLabels = this.data.chart.data.labels;
    this.barChartData = [
      { data: this.data.chart.data.datasets[0].data, label: 'Series A' },
    ];
    this.chartColors = [
      { backgroundColor: this.data.chart.data.datasets[0].backgroundColor },
    ];
    // this.barChartPlugins = [
    //   {
    //     beforeUpdate: function (c) {
    //       var chartHeight = c.chart.height;
    //       var size = (chartHeight * 5) / 100;
    //       c.scales['y-axis-0'].options.ticks.minor.fontSize = size;
    //     },
    //   },
    // ];
  }
}