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import { Injectable, Component } from '@angular/core';
import { Http, Headers, URLSearchParams } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import { Supplier } from '../model/supplier';

import { Resource } from '../resources/resource';

import 'rxjs/add/operator/map';
import 'rxjs/add/operator/toPromise';
import 'rxjs/add/observable/of';

@Injectable()
export class ApiCallService {

    private headers = new Headers({ "Content-type": "application/json" });

    constructor(
        private http: Http,
        private rs: Resource
    ) { }

    public getSuppliers(params: URLSearchParams): Promise<Supplier[]> {
        return this.http.get(this.rs.rs.api.supplier.all, { search: params, headers: this.headers }).toPromise().then(res => res.json() as Supplier[]);
    }

    public addSupplier(supplier: any): Promise<any> {
        return this.http.post(this.rs.rs.api.supplier.add, JSON.stringify(supplier), { headers: this.headers }).toPromise().then(r => r);
    }

    public addItem(item: any): Promise<any> {
        return this.http.post(this.rs.rs.api.item.add, JSON.stringify(item), { headers: this.headers }).toPromise().then(r => r);
    }

    public getCountSuppliers(params: URLSearchParams): Promise<any> {
        return this.http.get(this.rs.rs.api.supplier.count, { search: params, headers: this.headers }).toPromise().then(r => r.json() as number);
    }

    public countSuppliers(params: URLSearchParams): Observable<number> {
        return this.http.get(this.rs.rs.api.supplier.count, { search: params, headers: this.headers }).map(r => r.json() as number);
    }

    public suppliersSearch(params: URLSearchParams): Observable<Supplier[]> {
        return this.http.get(this.rs.rs.api.supplier.all, { search: params, headers: this.headers }).map(res => res.json() as Supplier[]);
    }

}