import { Component, OnInit, ViewChild } from '@angular/core';
import { FormBuilder, 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 { Product } from '../core/product';
import { ToCsvService } from '../shared/to-csv.service';

import { RawMaterialCost } from './raw-material-cost';
import { RawMaterialCostDataSource } from './raw-material-cost-datasource';

@Component({
  selector: 'app-raw-material-cost',
  templateUrl: './raw-material-cost.component.html',
  styleUrls: ['./raw-material-cost.component.css'],
})
export class RawMaterialCostComponent implements OnInit {
  @ViewChild(MatPaginator, { static: true }) paginator?: MatPaginator;
  @ViewChild(MatSort, { static: true }) sort?: MatSort;
  dataSource: RawMaterialCostDataSource;
  form: FormGroup;
  info: RawMaterialCost;
  debitQuantity: number;
  debitAmount: number;
  creditQuantity: number;
  creditAmount: number;
  runningQuantity: number;
  runningAmount: number;
  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
  displayedColumns: string[];
  columnsNoId = ['name', 'issue', 'sale', 'rmc'];
  columnsId = ['name', 'group', 'quantity', 'net', 'gross'];

  products: Observable<Product[]>;

  constructor(
    private route: ActivatedRoute,
    private router: Router,
    private fb: FormBuilder,
    private toCsv: ToCsvService,
  ) {
    this.form = this.fb.group({
      startDate: '',
      finishDate: '',
    });
  }

  ngOnInit() {
    this.route.data.subscribe((value) => {
      const data = value as { info: RawMaterialCost };

      this.info = data.info;
      this.displayedColumns = this.info.id ? this.columnsId : this.columnsNoId;
      this.form.setValue({
        startDate: moment(this.info.startDate, 'DD-MMM-YYYY').toDate(),
        finishDate: moment(this.info.finishDate, 'DD-MMM-YYYY').toDate(),
      });
      this.dataSource = new RawMaterialCostDataSource(this.paginator, this.sort, this.info.body);
    });
  }

  show() {
    const model = this.prepareSubmit();
    this.router.navigate(['raw-material-cost'], {
      queryParams: {
        startDate: model.startDate,
        finishDate: model.finishDate,
      },
    });
  }

  prepareSubmit(): RawMaterialCost {
    const formModel = this.form.value;

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

  exportCsv() {
    let headers: {};
    if (this.info.id) {
      headers = { Name: 'name', Group: 'group', Quantity: 'quantity', Net: 'net', Gross: 'gross' };
    } else {
      headers = { Name: 'name', Issue: 'issue', Sale: 'sale', RMC: 'rmc' };
    }

    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', 'raw-material-cost.csv');
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  }
}