import {Component, EventEmitter, Input, OnInit, Output} from '@angular/core';
import {
    MediaObjectService,
    PartnerJsonld,
    PartnerService,
    ProductService,
    SaleJsonld,
    SaleService
} from "@app/core/api/v1";
import {ModalStatus} from "@app/_helpers/modal.states";
import {FormGroup} from "@angular/forms";
import {debounceTime, distinctUntilChanged, Observable, OperatorFunction, Subscription, switchMap} from "rxjs";
import {TranslateService} from "@ngx-translate/core";
import {FormGroupInitializer} from "@app/_helpers/formgroup.initializer";
import {saleForm} from "@app/_forms/apiForms";
import {ApiHelperService} from "@app/_helpers/api-helper.service";
import {filter, map} from "rxjs/operators";

@Component({
    selector: 'app-new-sale',
    templateUrl: './new-sale.component.html',
    styleUrl: './new-sale.component.scss'
})
export class NewSaleComponent implements OnInit {
    @Input() public sale!: SaleJsonld;
    @Output() public submit: EventEmitter<ModalStatus> = new EventEmitter<ModalStatus>();

    protected saleForm: FormGroup;
    protected saleSub: Subscription;

    protected formatter = (apiData: any) => apiData.name;

    constructor(
        private saleService: SaleService,
        private partnerService: PartnerService,
        private productService: ProductService,
        private translateService: TranslateService,
        protected apiHelperService: ApiHelperService,
    ) {
        this.saleForm = saleForm;

        this.saleSub = new Subscription();
    }

    ngOnInit(): void {
        this.saleForm = FormGroupInitializer.initFormGroup(this.saleForm, this.sale);
    }

    protected searchPartners: OperatorFunction<string, readonly {
        id: any;
        name: any
    }[]> = (text$: Observable<string>) =>
        text$.pipe(
            debounceTime(200),
            distinctUntilChanged(),
            filter((term) => term.length >= 2),
            switchMap((term) => this.fetchPartners(term)),
            map((partners) => partners.slice(0, 10)),
        );

    protected searchProducts: OperatorFunction<string, readonly {
        id: any;
        name: any
    }[]> = (text$: Observable<string>) =>
        text$.pipe(
            debounceTime(200),
            distinctUntilChanged(),
            filter((term) => term.length >= 2),
            switchMap((term) => this.fetchProducts(term)),
            map((products) => products.slice(0, 10)),
        );

    protected fetchPartners(term: string): Observable<{ id: any; name: any }[]> {
        return this.partnerService.partnersGetCollection(1, 50, undefined, undefined, term).pipe(
            map((response) => response['hydra:member'].map(partner => ({id: partner.id, name: partner.name}))),
        );
    }

    protected fetchProducts(term: string): Observable<{ id: any; name: any }[]> {
        return this.productService.productsGetCollection(1, 50, term).pipe(
            map((response) => response['hydra:member'].map(product => ({id: product.id, name: product.name}))),
        );
    }

    protected onPartnerSelect(selectedItem: any): void {
        this.saleForm.get('partner')?.setValue(selectedItem.item.id);
    }

    protected onProductSelect(selectedItem: any): void {
        this.saleForm.get('product')?.setValue(selectedItem.item.id);
    }

    onSubmit() {
        if (this.saleForm.valid) {
            if (this.saleForm.get('profit')?.value > this.saleForm.get('turnover')?.value) {
                let alertMessage = "";
                this.translateService.get('system.profit-larger-turnover').subscribe((translation: string) => {
                    alertMessage = translation;
                });
                alert(alertMessage);
                return;
            }
            if (this.sale.id === null || this.sale.id === undefined) {
                // Create new sale
                this.saleSub = this.saleService.salesPost(
                    this.saleForm.value as SaleJsonld
                ).subscribe(
                    data => {
                        this.saleForm.reset();
                        this.submit.emit(ModalStatus.Submitted);
                    }
                );
            } else {
                // Edit sale
                this.saleSub = this.saleService.salesIdPatch(
                    this.apiHelperService.extractId(this.sale.id),
                    this.saleForm.value as SaleJsonld
                ).subscribe(
                    data => {
                        this.saleForm.reset();
                        this.submit.emit(ModalStatus.Submitted);
                    }
                );
            }
        }
    }
}