import { Component, OnInit, ViewChild, ElementRef } from '@angular/core';
import { FormControl, FormGroup } from '@angular/forms';
import { MatPaginator } from '@angular/material/paginator';
import { MatSort } from '@angular/material/sort';
import { ActivatedRoute, Router } from '@angular/router';
import * as moment from 'moment';
import { Observable } from 'rxjs';
import { debounceTime, distinctUntilChanged } from 'rxjs/operators';

import { ToasterService } from '../core/toaster.service';
import { ToCsvService } from '../shared/to-csv.service';

import { MenuEngineeringReport } from './menu-engineering-report';
import { MenuEngineeringReportDataSource } from './menu-engineering-report-datasource';
import { MenuEngineeringReportService } from './menu-engineering-report.service';

@Component({
  selector: 'app-menu-engineering-report',
  templateUrl: './menu-engineering-report.component.html',
  styleUrls: ['./menu-engineering-report.component.css'],
})
export class MenuEngineeringReportComponent implements OnInit {
  @ViewChild('filterElement', { static: true }) filterElement?: ElementRef;
  @ViewChild(MatPaginator, { static: true }) paginator?: MatPaginator;
  @ViewChild(MatSort, { static: true }) sort?: MatSort;
  info: MenuEngineeringReport = new MenuEngineeringReport();
  filter: Observable<string>;
  dataSource: MenuEngineeringReportDataSource;
  form: FormGroup<{
    startDate: FormControl<Date>;
    finishDate: FormControl<Date>;
    filter: FormControl<string>;
  }>;

  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
  displayedColumns = ['name', 'price', 'saleCategory', 'menuCategory', 'quantity', 'amount'];

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private toCsv: ToCsvService,
    private toaster: ToasterService,
    private ser: MenuEngineeringReportService,
  ) {
    // Create form
    this.form = new FormGroup({
      startDate: new FormControl(new Date(), { nonNullable: true }),
      finishDate: new FormControl(new Date(), { nonNullable: true }),
      filter: new FormControl<string>('', { nonNullable: true }),
    });
    // Listen to Filter Change
    this.filter = this.form.controls.filter.valueChanges.pipe(debounceTime(150), distinctUntilChanged());
    this.dataSource = new MenuEngineeringReportDataSource(this.info.amounts, this.filter);
  }

  ngOnInit() {
    this.route.data.subscribe((value) => {
      const data = value as { info: MenuEngineeringReport };
      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(),
        filter: '',
      });
      this.dataSource = new MenuEngineeringReportDataSource(this.info.amounts, this.filter, this.paginator, this.sort);
    });
  }

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

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

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

  print() {
    this.ser.print(this.info.startDate, this.info.finishDate).subscribe(
      () => {
        this.toaster.show('', 'Successfully Printed');
      },
      (error) => {
        this.toaster.show('Error', error);
      },
    );
  }

  exportCsv() {
    const headers = {
      Name: 'name',
      Price: 'price',
      Average: 'average',
      'Sale Category': 'saleCategory',
      'Menu Category': 'menuCategory',
      Quantity: 'quantity',
      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', 'menu-engineering-report.csv');
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  }
}