import { Injectable } from '@angular/core';
import { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { Observable } from 'rxjs';
import { AuthenticationService } from './authentication.service';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {
    constructor(private authService: AuthenticationService) { }

    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        // Skip adding auth header for authentication endpoints
        if (req.url.includes('/api/auth/authenticate') || req.url.includes('/assets/')) {
            return next.handle(req);
        }

        // Get custom access token
        const token = this.authService.getCustomAccessToken();
        
        if (token) {
            // Clone request and add Authorization header
            const authReq = req.clone({
                headers: req.headers.set('Authorization', `Bearer ${token}`)
            });
            return next.handle(authReq);
        }

        return next.handle(req);
    }
}