/**
 * User GET method
 * */
import {IRequestOptions} from "../IRequestOptions";
import {IParamsObject} from "../IParamsObject";
import {addURLParam} from "../URLUtils";
import {globalSetupOptions} from "../globalSetup";

export function getData(path: string, data: IParamsObject|null, options?: IRequestOptions): Promise<any> {

	return new Promise((resolve, reject) => {
		const xhr = new XMLHttpRequest();

		xhr.onreadystatechange = function() {
			if(xhr.readyState === 4) {
				if(globalSetupOptions.afterEachRequest) {
					globalSetupOptions.afterEachRequest(xhr);
				}
				if(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304) {
					if(/application\/json/.test(xhr.getResponseHeader('Content-Type'))) {
						resolve(JSON.parse(xhr.responseText));
					} else {
						resolve(xhr.responseText);
					}
				} else {
					reject(new Error('xhr failed: ' + xhr.status));
				}
			}
		}


		if(data) {
			path = addURLParam(path, data);
		}
		xhr.open('GET', path);

		if(globalSetupOptions.beforeEachRequest) {
			globalSetupOptions.beforeEachRequest(xhr);
		}

		if(options) {
			if(options.beforeSend) {
				options.beforeSend(xhr);
			}
		}
		xhr.send(null);
	});

}