import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';
import { ActivatedRoute, Router } from '@angular/router';
import * as moment from 'moment';
import { TaxReportDatasource } from './tax-report-datasource';
import { TaxReport } from './tax-report';
import { ToCsvService } from '../shared/to-csv.service';

@Component({
  selector: 'app-tax-report',
  templateUrl: './tax-report.component.html',
  styleUrls: ['./tax-report.component.css']
})
export class TaxReportComponent implements OnInit {
  dataSource: TaxReportDatasource;
  form: FormGroup;
  info: TaxReport;

  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
  displayedColumns = ['name', 'taxRate', 'saleAmount', 'taxAmount'];


  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private fb: FormBuilder,
    private toCsv: ToCsvService
  ) {
    this.createForm();

  }

  ngOnInit() {
    this.route.data
      .subscribe((data: { info: TaxReport }) => {
        this.info = data.info;
        this.form.setValue({
          startDate: moment(this.info.startDate, 'DD-MMM-YYYY').toDate(),
          finishDate: moment(this.info.finishDate, 'DD-MMM-YYYY').toDate()
        });
        this.dataSource = new TaxReportDatasource(this.info.amounts);
      });
  }

  show() {
    const info = this.getInfo();
    this.router.navigate(['tax-report'], {
      queryParams: {
        startDate: info.startDate,
        finishDate: info.finishDate
      }
    });
  }

  createForm() {
    this.form = this.fb.group({
      startDate: '',
      finishDate: ''
    });
  }

  getInfo(): TaxReport {
    const formModel = this.form.value;

    return {
      startDate: moment(formModel.startDate).format('DD-MMM-YYYY'),
      finishDate: moment(formModel.finishDate).format('DD-MMM-YYYY')
    };
  }

  exportCsv() {
    const headers = {
      Name: 'name',
      Amount: 'amount'
    };
    const csvData = new Blob([this.toCsv.toCsv(headers, this.dataSource.data)], {type: 'text/csv;charset=utf-8;'});
    const link = document.createElement('a');
    link.href = window.URL.createObjectURL(csvData);
    link.setAttribute('download', 'tax-report.csv');
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  }
}