import { Component, OnInit, ViewChild } from '@angular/core';
import { UntypedFormArray, UntypedFormBuilder, FormControl, UntypedFormGroup } from '@angular/forms';
import { MatDialog } from '@angular/material/dialog';
import { MatPaginator } from '@angular/material/paginator';
import { MatSelectChange } from '@angular/material/select';
import { MatSort } from '@angular/material/sort';
import { ActivatedRoute, Router } from '@angular/router';
import * as moment from 'moment';

import { AuthService } from '../auth/auth.service';
import { CostCentre } from '../core/cost-centre';
import { ToasterService } from '../core/toaster.service';
import { User } from '../core/user';
import { ConfirmDialogComponent } from '../shared/confirm-dialog/confirm-dialog.component';
import { ToCsvService } from '../shared/to-csv.service';

import { ClosingStock } from './closing-stock';
import { ClosingStockDataSource } from './closing-stock-datasource';
import { ClosingStockItem } from './closing-stock-item';
import { ClosingStockService } from './closing-stock.service';

@Component({
  selector: 'app-closing-stock',
  templateUrl: './closing-stock.component.html',
  styleUrls: ['./closing-stock.component.css'],
})
export class ClosingStockComponent implements OnInit {
  @ViewChild(MatPaginator, { static: true }) paginator?: MatPaginator;
  @ViewChild(MatSort, { static: true }) sort?: MatSort;
  info: ClosingStock = new ClosingStock();
  dataSource: ClosingStockDataSource = new ClosingStockDataSource(this.info.items);
  form: UntypedFormGroup;
  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
  displayedColumns = [
    'product',
    'group',
    'quantity',
    'physical',
    'variance',
    'department',
    'amount',
  ];

  costCentres: CostCentre[];

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private fb: UntypedFormBuilder,
    private toCsv: ToCsvService,
    private dialog: MatDialog,
    private toaster: ToasterService,
    public auth: AuthService,
    private ser: ClosingStockService,
  ) {
    this.costCentres = [];
    this.form = this.fb.group({
      date: '',
      costCentre: '',
      stocks: this.fb.array([]),
    });
  }

  ngOnInit() {
    this.route.data.subscribe((value) => {
      const data = value as { info: ClosingStock; costCentres: CostCentre[] };
      this.info = data.info;
      this.costCentres = data.costCentres;
      this.form.patchValue({
        date: moment(this.info.date, 'DD-MMM-YYYY').toDate(),
        costCentre: this.info.costCentre.id,
      });
      this.form.setControl(
        'stocks',
        this.fb.array(
          this.info.items.map((x) =>
            this.fb.group({
              physical: '' + x.physical,
              costCentre: x.costCentre?.id,
            }),
          ),
        ),
      );
      this.dataSource = new ClosingStockDataSource(this.info.items, this.paginator, this.sort);
    });
  }

  show() {
    const info = this.getInfo();
    this.router.navigate(['closing-stock', info.date], {
      queryParams: {
        d: info.costCentre.id,
      },
    });
  }

  save() {
    this.ser.save(this.getClosingStock()).subscribe(
      () => {
        this.toaster.show('Success', '');
      },
      (error) => {
        this.toaster.show('Danger', error);
      },
    );
  }

  getClosingStock(): ClosingStock {
    const formModel = this.form.value;
    this.info.date = moment(formModel.date).format('DD-MMM-YYYY');
    const array = this.form.get('stocks') as UntypedFormArray;
    this.info.items.forEach((item, index) => {
      item.physical = +array.controls[index].value.physical;
      item.costCentre =
        array.controls[index].value.costCentre == null
          ? undefined
          : new CostCentre({ id: array.controls[index].value.costCentre });
    });
    console.log('getClosingStock', this.info);
    return this.info;
  }

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

    return new ClosingStock({
      date: moment(formModel.date).format('DD-MMM-YYYY'),
      costCentre: new CostCentre({ id: formModel.costCentre }),
    });
  }

  exportCsv() {
    const headers = {
      Product: 'product',
      Group: 'group',
      Quantity: 'quantity',
      Amount: 'amount',
    };

    const d = JSON.parse(JSON.stringify(this.dataSource.data)).map(
      (x: ClosingStockItem)=> ({product: x.product.name, group: x.group, quantity: x.quantity, amount: x.amount})
    );
    const csvData = new Blob([this.toCsv.toCsv(headers, d)], {
      type: 'text/csv;charset=utf-8;',
    });
    const link = document.createElement('a');
    link.href = window.URL.createObjectURL(csvData);
    link.setAttribute('download', 'closing-stock.csv');
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  }

  updatePhysical($event: Event, row: ClosingStockItem) {
    row.physical = +($event.target as HTMLInputElement).value;
  }

  updateDepartment($event: MatSelectChange, row: ClosingStockItem) {
    row.costCentre = new CostCentre({ id: $event.value });
  }

  canDelete() {
    return this.info.items.find((x) => !!x.id) !== undefined;
  }

  canSave() {
    if (this.info.items.find((x) => !!x.id) !== undefined) {
      return true;
    }
    if (this.info.posted && this.auth.allowed('edit-posted-vouchers')) {
      return true;
    }
    return (
      this.info.user.id === (this.auth.user as User).id ||
      this.auth.allowed("edit-other-user's-vouchers")
    );
  }

  post() {
    this.ser.post(this.info.date, this.info.costCentre.id as string).subscribe(
      (result) => {
        // this.loadVoucher(result);
        this.toaster.show('Success', 'Voucher Posted');
      },
      (error) => {
        this.toaster.show('Danger', error);
      },
    );
  }

  delete() {
    this.ser.delete(this.info.date, this.info.costCentre.id as string).subscribe(
      () => {
        this.toaster.show('Success', '');
        this.router.navigate(['/closing-stock'], { replaceUrl: true });
      },
      (error) => {
        this.toaster.show('Danger', error);
      },
    );
  }

  confirmDelete(): void {
    const dialogRef = this.dialog.open(ConfirmDialogComponent, {
      width: '250px',
      data: {
        title: 'Delete Closing Stock information?',
        content: 'Are you sure? This cannot be undone.',
      },
    });

    dialogRef.afterClosed().subscribe((result: boolean) => {
      if (result) {
        this.delete();
      }
    });
  }
}