/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {HttpContext} from '@angular/common/http/src/context';
import {HttpHeaders} from '@angular/common/http/src/headers';
import {HttpParams} from '@angular/common/http/src/params';
import {HttpRequest} from '@angular/common/http/src/request';

const TEST_URL = 'https://angular.io/';
const TEST_STRING = `I'm a body!`;

describe('HttpRequest', () => {
  describe('constructor', () => {
    it('initializes url', () => {
      const req = new HttpRequest('', TEST_URL, null);
      expect(req.url).toBe(TEST_URL);
    });
    it("doesn't require a body for body-less methods", () => {
      let req = new HttpRequest('GET', TEST_URL);
      expect(req.method).toBe('GET');
      expect(req.body).toBeNull();
      req = new HttpRequest('HEAD', TEST_URL);
      expect(req.method).toBe('HEAD');
      expect(req.body).toBeNull();
      req = new HttpRequest('JSONP', TEST_URL);
      expect(req.method).toBe('JSONP');
      expect(req.body).toBeNull();
      req = new HttpRequest('OPTIONS', TEST_URL);
      expect(req.method).toBe('OPTIONS');
      expect(req.body).toBeNull();
    });
    it('accepts a string request method', () => {
      const req = new HttpRequest('TEST', TEST_URL, null);
      expect(req.method).toBe('TEST');
    });
    it('accepts a string body', () => {
      const req = new HttpRequest('POST', TEST_URL, TEST_STRING);
      expect(req.body).toBe(TEST_STRING);
    });
    it('accepts an object body', () => {
      const req = new HttpRequest('POST', TEST_URL, {data: TEST_STRING});
      expect(req.body).toEqual({data: TEST_STRING});
    });
    it('creates default headers if not passed', () => {
      const req = new HttpRequest('GET', TEST_URL);
      expect(req.headers instanceof HttpHeaders).toBeTruthy();
    });
    it('uses the provided headers if passed', () => {
      const headers = new HttpHeaders();
      const req = new HttpRequest('GET', TEST_URL, {headers});
      expect(req.headers).toBe(headers);
    });
    it('uses the provided context if passed', () => {
      const context = new HttpContext();
      const req = new HttpRequest('GET', TEST_URL, {context});
      expect(req.context).toBe(context);
    });
    it('defaults to Json', () => {
      const req = new HttpRequest('GET', TEST_URL);
      expect(req.responseType).toBe('json');
    });
  });
  describe('clone() copies the request', () => {
    const headers = new HttpHeaders({
      'Test': 'Test header',
    });
    const context = new HttpContext();
    const req = new HttpRequest('POST', TEST_URL, 'test body', {
      headers,
      context,
      reportProgress: true,
      responseType: 'text',
      withCredentials: true,
    });
    it('in the base case', () => {
      const clone = req.clone();
      expect(clone.method).toBe('POST');
      expect(clone.responseType).toBe('text');
      expect(clone.url).toBe(TEST_URL);
      // Headers should be the same, as the headers are sealed.
      expect(clone.headers).toBe(headers);
      expect(clone.headers.get('Test')).toBe('Test header');

      expect(clone.context).toBe(context);
    });
    it('and updates the url', () => {
      expect(req.clone({url: '/changed'}).url).toBe('/changed');
    });
    it('and updates the method', () => {
      expect(req.clone({method: 'PUT'}).method).toBe('PUT');
    });
    it('and updates the body', () => {
      expect(req.clone({body: 'changed body'}).body).toBe('changed body');
    });
    it('and updates the context', () => {
      const newContext = new HttpContext();
      expect(req.clone({context: newContext}).context).toBe(newContext);
    });
  });
  describe('content type detection', () => {
    const baseReq = new HttpRequest('POST', '/test', null);
    it('handles a null body', () => {
      expect(baseReq.detectContentTypeHeader()).toBeNull();
    });
    it("doesn't associate a content type with ArrayBuffers", () => {
      const req = baseReq.clone({body: new ArrayBuffer(4)});
      expect(req.detectContentTypeHeader()).toBeNull();
    });
    it('handles strings as text', () => {
      const req = baseReq.clone({body: 'hello world'});
      expect(req.detectContentTypeHeader()).toBe('text/plain');
    });
    it('handles arrays as json', () => {
      const req = baseReq.clone({body: ['a', 'b']});
      expect(req.detectContentTypeHeader()).toBe('application/json');
    });
    it('handles numbers as json', () => {
      const req = baseReq.clone({body: 314159});
      expect(req.detectContentTypeHeader()).toBe('application/json');
    });
    it('handles objects as json', () => {
      const req = baseReq.clone({body: {data: 'test data'}});
      expect(req.detectContentTypeHeader()).toBe('application/json');
    });
    it('handles boolean as json', () => {
      const req = baseReq.clone({body: true});
      expect(req.detectContentTypeHeader()).toBe('application/json');
    });
  });
  describe('body serialization', () => {
    const baseReq = new HttpRequest('POST', '/test', null);
    it('handles a null body', () => {
      expect(baseReq.serializeBody()).toBeNull();
    });
    it('passes ArrayBuffers through', () => {
      const body = new ArrayBuffer(4);
      expect(baseReq.clone({body}).serializeBody()).toBe(body);
    });
    it('passes URLSearchParams through', () => {
      const body = new URLSearchParams('foo=1&bar=2');
      expect(baseReq.clone({body}).serializeBody()).toBe(body);
    });
    it('passes strings through', () => {
      const body = 'hello world';
      expect(baseReq.clone({body}).serializeBody()).toBe(body);
    });
    it('serializes arrays as json', () => {
      expect(baseReq.clone({body: ['a', 'b']}).serializeBody()).toBe('["a","b"]');
    });
    it('handles numbers as json', () => {
      expect(baseReq.clone({body: 314159}).serializeBody()).toBe('314159');
    });
    it('handles objects as json', () => {
      const req = baseReq.clone({body: {data: 'test data'}});
      expect(req.serializeBody()).toBe('{"data":"test data"}');
    });
    it('serializes parameters as urlencoded', () => {
      const params = new HttpParams().append('first', 'value').append('second', 'other');
      const withParams = baseReq.clone({body: params});
      expect(withParams.serializeBody()).toEqual('first=value&second=other');
      expect(withParams.detectContentTypeHeader()).toEqual(
        'application/x-www-form-urlencoded;charset=UTF-8',
      );
    });
  });
  describe('parameter handling', () => {
    const baseReq = new HttpRequest('GET', '/test', null);
    const params = new HttpParams({fromString: 'test=true'});
    it('appends parameters to a base URL', () => {
      const req = baseReq.clone({params});
      expect(req.urlWithParams).toEqual('/test?test=true');
    });
    it('appends parameters to a URL with an empty query string', () => {
      const req = baseReq.clone({params, url: '/test?'});
      expect(req.urlWithParams).toEqual('/test?test=true');
    });
    it('appends parameters to a URL with a query string', () => {
      const req = baseReq.clone({params, url: '/test?other=false'});
      expect(req.urlWithParams).toEqual('/test?other=false&test=true');
    });
    it('sets parameters via setParams', () => {
      const req = baseReq.clone({setParams: {'test': 'false'}});
      expect(req.urlWithParams).toEqual('/test?test=false');
    });
  });
});