/** @file
 * @author Edouard DUPIN
 * @copyright 2018, Edouard DUPIN, all right reserved
 * @license PROPRIETARY (see license file)
 */

import { Injectable } from '@angular/core';
import { environment } from 'environments/environment';
import { getApplicationLocation, isInArray, isNullOrUndefined } from 'common/utils';
import { HTTPMimeType, HTTPRequestModel, HttpWrapperService, ModelResponseHttp } from 'common/service';

@Injectable()
export class SSOService {
	signUpEnable: boolean = undefined;
	
	constructor(
		private http: HttpWrapperService,
		) {
		console.log('Start SSOService');
	}
	utf8_to_b64( str:string ): string {
		// remove unneeded "=" padding
		return window.btoa(encodeURIComponent( str )).replace("=", "");
	}
	  
	b64_to_utf8( str:string ): string {
		return decodeURIComponent(window.atob( str ));
	}
	/**
	 * Request SSO connection
	 */
	hashLocalData(data?: string): string {
		if (!isNullOrUndefined(data) && !isInArray(data, ["", "null", "NULL", "undefined", "---", "unregistered", "unregistered/", "forbidden", "forbidden/"])) {
			return this.utf8_to_b64(data);
		}
		let pathName = getApplicationLocation();
		if (isInArray(pathName, ["sso", "/sso", "/sso/"])) {
			return this.utf8_to_b64('home');
		}
		if (!isNullOrUndefined(pathName) && !isInArray(pathName, ["", "null", "NULL", "undefined", "---", "unregistered", "unregistered/", "forbidden", "forbidden/"])) {
			return this.utf8_to_b64(pathName);
		}
		return this.utf8_to_b64('home');
	}
	/**
	 * Request SSO connection
	 */
	unHashLocalData(data: string): string | undefined {
		if (isNullOrUndefined(data) || isInArray(data, ["", "null", "NULL", "undefined", "---"])) {
			return undefined;
		}
		try {
			return this.b64_to_utf8(data);
		}
		catch (ex) {
			console.error(`Can not convert the data: ${data}`);
		}
		return undefined;
	}
	/**
	 * Request SSO connection
	 */
	requestSignIn(name?: string): void {
		window.location.href = environment.ssoSignIn + this.hashLocalData(name);
	}
	/**
	 * Request SSO Disconnect
	 */
	requestSignOut(name?: string): void {
		window.location.href = environment.ssoSignOut + this.hashLocalData(name);
	}
	/**
	 * Request SSO signUp
	 */
	requestSignUp(name?: string): void {
		window.location.href = environment.ssoSignUp + this.hashLocalData(name);
	}
	/**
	 * Checo if the signUp is authorized (generate by te SSO)
	 * @returns a promise of the State for sign-up
	 */
	checkSignUpEnable(): Promise<boolean> {
		let self = this;
		return new Promise((resolve, reject) => {
			if (isNullOrUndefined(self.signUpEnable)) {
				this.http.requestJson({
						server: 'karauth',
						endPoint: 'system_config/is_sign_up_availlable',
						requestType: HTTPRequestModel.GET,
						accept: HTTPMimeType.JSON,
						contentType: HTTPMimeType.JSON,
					}).then((response: ModelResponseHttp) =>{
						self.signUpEnable = response.data.signup;
						resolve(self.signUpEnable);
					}).catch((error:any) => {
						reject(`return ERROR ${ JSON.stringify(error, null, 2)}`);
					});
				return;
			}
			resolve(self.signUpEnable);
		});
				
	}
	
}