import { Injectable } from '@angular/core';
import { Http, RequestOptions, Response, Headers } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import { Router, ActivatedRoute, RouterStateSnapshot } from '@angular/router';
import { MatSnackBar } from '@angular/material';
import { TranslateService } from '@ngx-translate/core';
import { HttpClient } from '@angular/common/http';
import { AuthService } from '../../services/auth/auth.service';
import { SnackBarNotificationComponent } from '../../shared/components/notificaiton/snack-bar-notification.component';
import { BaseHttpResponseModel } from '../../models/http/BaseHttpResponseModel';

@Injectable()
export class BaseHttpService {
	constructor(
		protected http: HttpClient,
		private router: Router,
		private authService: AuthService,
		public language: TranslateService,
		public snackBar: MatSnackBar,
		public route: ActivatedRoute
	) {
	}
	get<T>(url: string, options?: any): Observable<T> {
		return this.interceptRepsonse<T>(this.http.get(url, this.buildRequestOptions(options)));
	}
	post<T>(url: string, body: any, options?: any): Observable<T> {
		return this.interceptRepsonse<T>(this.http.post(url, body, this.buildRequestOptions(options)));
	}
	put<T>(url: string, body: any, options?: any): Observable<T> {
		return this.interceptRepsonse<T>(this.http.put(url, body, this.buildRequestOptions(options)));
	}
	delete<T>(url: string, options?: any): Observable<T> {
		return this.interceptRepsonse<T>(this.http.delete(url, this.buildRequestOptions(options)));
	}
	patch<T>(url: string, body: any, options?: any): Observable<T> {
		return this.interceptRepsonse(this.http.patch(url, body, this.buildRequestOptions(options)));
	}
	head<T>(url: string, options?: any): Observable<T> {
		return this.interceptRepsonse<T>(this.http.head(url, this.buildRequestOptions(options)));
	}
	options<T>(url: string, options?: any): Observable<T> {
		return this.interceptRepsonse<T>(this.http.options(url, this.buildRequestOptions(options)));
	}

	protected buildRequestOptions(options?: any): Object {
		if (options == null) {
			options = new RequestOptions();
		}
		if (options.headers == null) {
			options.headers = new Headers();
		}
		if (!options.headers.has('Content-Type')) {
			options.headers = options.headers.set('Content-Type', 'application/json');
		}
		if (!options.headers.has('Content-Type')) {
			options.headers = options.headers.set('Content-Type', 'application/json');
		}
		if (!options.headers.has('AuthToken')) {
			const principal = this.authService.current();
			if (principal) {
				options.headers = options.headers.set('AuthToken', principal.token);
			}
		}

		return options;
	}

	private interceptRepsonse<T>(observable: Observable<Object>): Observable<T> {
		return observable
			.catch((error) => {
				if (error.status === 401) {
					this.snackBar.openFromComponent(SnackBarNotificationComponent, {
						data: { message: 'GENERAL.SNACK-BAR.SUCCESSFUL-LOGOUT', language: this.language },
						duration: 3000,
						extraClasses: ['snackbar-success']
					})
					let currentPage = this.router.url;
					this.router.navigate(['/unauthorized'], { queryParams: { returnUrl: currentPage } });
					//this.notification.httpError(error);
					return Observable.of<T>();
				} else {
					return Observable.throw(error);
				}
			})
			.map(response => {
				if (response.statusCode < 200 || response.statusCode >= 300) {
					//throw new Error('Request failed');
					this.snackBar.openFromComponent(SnackBarNotificationComponent, {
						data: { message: 'GENERAL.ERRORS.HTTP-REQUEST-ERROR', language: this.language },
						duration: 3000,
						extraClasses: ['snackbar-warning']
					})
				}
				else {
					return response.payload;
				}
			});
	}

	// public handleResponse<T>(response: BaseHttpResponseModel<T>) {
	// 	if (response.statusCode < 200 || response.statusCode >= 300) {
	// 		//throw new Error('Request failed');
	// 		this.snackBar.openFromComponent(SnackBarNotificationComponent, {
	// 			data: { message: 'GENERAL.ERRORS.HTTP-REQUEST-ERROR', language: this.language },
	// 			duration: 3000,
	// 			extraClasses: ['snackbar-warning']
	// 		})
	// 	}
	// 	else {
	// 		return response.payload;
	// 	}
	// }
}