import { Injectable } from '@angular/core';
import { Product } from '../core/product';
import { ModifiersComponent } from './modifiers/modifiers.component';
import { MatDialog } from '@angular/material';
import { ModifierCategoryService } from '../modifier-categories/modifier-category.service';
import {Subject} from "rxjs";
import {Modifier} from "../core/modifier";
import {ModifierCategory} from "../core/modifier-category";
import {isNotNullOrUndefined} from "codelyzer/util/isNotNullOrUndefined";

@Injectable()
export class BillService {
  public dataObs = new Subject<any[]>();
  public data = [];
  constructor(
        private dialog: MatDialog,
    private modifierCategoryService: ModifierCategoryService
  ) { }

  addProduct(product: Product) {
    let item = {
      isKot: false,
      product: product,
      productId: product.id,
      info: `${product.name} (${product.units}) @ ${product.price}`,
      quantity: 1,
      modifiers: []
    };
    this.data.push(item);
    this.modifierCategoryService.listIsActiveOfProduct(product.id).subscribe(result => {
      if (result.reduce((a: any, c: ModifierCategory) => {return a + c.minimum}, 0)) {
        this.showModifier(item);
      }
    });
    this.dataObs.next(this.data);
  }

  showModifier(item: any): void {
    // [routerLink]="['/sales', 'modifiers', item.id]"
    const dialogRef = this.dialog.open(ModifiersComponent, {
      position: {
        top: '10vh'
      },
      data: {
        list: this.modifierCategoryService.listIsActiveOfProduct(item.productId),
        selected: item.modifiers
      }
    });

    dialogRef.afterClosed().subscribe(result => {
      if (isNotNullOrUndefined(result)) {
        item.modifiers = result;
      }
    });
  }

  addOne(item: any): void {
    item.quantity += 1;
    this.dataObs.next(this.data);
  }

  quantity(item: any): void {

  }

  subtractOne(item: any): void {
    if (item.quantity > 1) {
      item.quantity -= 1;
      this.dataObs.next(this.data);
    } else if (item.quantity === 0) {
      this.removeItem(item);
    }
  }

  removeItem(item: any): void {
    this.data.splice(this.data.indexOf(item), 1);
    this.dataObs.next(this.data);
  }

  modifier(item: any): void {
    this.showModifier(item);
  }

}