/** @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 { HTTPMimeType, HTTPRequestModel, HttpWrapperService, ModelResponseHttp } from './http-wrapper';
import { StorageService } from 'common/service/local-storage';
import { SessionService } from './session';
import { SSOService } from './sso';

interface MessageLogIn {
	login: string;
	method: string;
	time: number;
	password: string;
}

interface MessageAnswer_USER_CONNECT {
	sessionId: string,
	login: string,
	eMail: string,
	role: string,
	avatar: string
}

declare function SHA512(param1: any): any;

@Injectable()
export class UserService {
	// 0: Not hide password; 1 hide password;
	private identificationVersion: number = 1;
	private cookiesRememberMe = 'remember-me';
	private cookiesToken = 'token';

	constructor(
		private storageService: StorageService,
		private http: HttpWrapperService,
		private sessionService: SessionService,
		private ssoService: SSOService) {
		console.log('Start UserService');
	}

	/**
	 * Disconnect the user from the current session ==> this remove the curreent Token
	 */
	logOut(): void {
		this.removeSession();
		this.ssoService.requestSignOut("home");

	}
	removeSession(): void {
		this.storageService.remove(this.cookiesRememberMe);
		this.storageService.removeSession(this.cookiesToken);
		this.sessionService.destroy();
	}

	private isTokenUpToDate(token: string): boolean {
		if (token === null || token === undefined || token.length < 25) {
			return false;
		}
		// Separate the Data:
		const elems = token.split('.');
		if (elems.length !== 3 ) {
			return false;
		}
		const tokenHeader = decodeURIComponent(escape(window.atob( elems[0] )));
		const tokenData = decodeURIComponent(escape(window.atob( elems[1] )));
		console.error(`Retreive local token: \nheader=${tokenHeader} \ndata=${tokenData}`);
		const parsedData = JSON.parse(tokenData);
		console.error(`Retreive exp data=${new Date(parsedData.exp*1000).toISOString()} < ${new Date().toISOString()}`);
		const expireIn = new Date(parsedData.exp*1000);
		const nowTime = new Date();
		// TODO: set a marging of 2 hours...
		return expireIn > nowTime;
	}
	/**
	 * Check if the system can be connected
	 */
	checkAutoConnect(): Promise<void> {
		let self = this;
		return new Promise<void>((resolve, reject) => {
			// Need to use the windows global route to prevent the log in cycle ... 
			// And in the mlain application position, the route does not have curently root the page
			let pathName = window.location.pathname;
			//console.log("start Path-name: '" + pathName  + "'");
			//console.log("check with:      '" + environment.applName + "/sso/" + "'");
			if (pathName.startsWith("/sso/") || pathName.startsWith(environment.applName + "/sso/")) {
				console.log("    ==> SSo section");
				reject();
				return;
			}
			console.log("    ==> Check if need reconnect?");
			let rememberMe = self.storageService.get(self.cookiesRememberMe)==="true";
			// TODO: in case of jest reload ==> no need to manage the SSO ==> just keep the token ... it in enought...
			let token = self.storageService.getSession(self.cookiesToken);
			// TODO: check validity of th eToken: 
			if (self.isTokenUpToDate(token)) {
				// remove in case of fail !!!
				this.storageService.removeSession(this.cookiesToken);
				self.startSession(token, rememberMe).then(() => {
					resolve();
				}).catch(() => {
					// jump in the sign-in page (automatically of request remember-me)
					if(rememberMe) {
						// jump to the sso !!! (remove local data to prevent login loop)
						this.storageService.remove(this.cookiesRememberMe);
						this.storageService.removeSession(this.cookiesToken);
						self.ssoService.requestSignIn();
						reject();
					}	
					resolve();
				});
			} else {
				console.log(`Get previous connection ... `);
				if(rememberMe) {
					// jump to the sso !!! (remove local data to prevent login loop)
					this.storageService.remove(this.cookiesRememberMe);
					this.storageService.removeSession(this.cookiesToken);
					self.ssoService.requestSignIn();
					reject();
				}
				resolve();
			}
		});
	}
	
	startSession(token : string, rememberMe: boolean): Promise<string> {
		let self = this;
		return new Promise((resolve, reject) => {
			self.retreiveMe(token).then(
				(value2: boolean) => {
					if(rememberMe === true) {
						self.storageService.set(self.cookiesRememberMe, rememberMe?"true":"false");
					}
					// transfer the session token property
					self.sessionService.setToken(token);
					self.storageService.setSession(self.cookiesToken, token);
					resolve(self.sessionService.getLogin());
				}).catch(() => {
					reject('sdfsdfsdf');
				});
		});
	}
	retreiveMe(token : string): Promise<boolean> {
		console.log(`AuthService.loginWithToken ... '${ token }'`);
		let self = this;
		return new Promise((resolve, reject) => {
			this.http.requestJson({
				    //server: 'karauth',
					endPoint: 'users/me',
					requestType: HTTPRequestModel.GET,
					accept: HTTPMimeType.JSON,
					contentType: HTTPMimeType.JSON,
					authorization: `Yota ${token}`, // special case, the token is set after this request...
				}).then((response: ModelResponseHttp) =>{
					// TODO: check type ...
					console.log(`loginWithToken : get some data to check: ${JSON.stringify(response.data)}`)
					self.sessionService.create(
						response.data.sessionId,
						response.data.id,
						response.data.login,
						response.data.email,
						response.data.role,
						response.data.avatar);
					resolve(true);
				}).catch((error:any) => {
					reject(`return ERROR ${ JSON.stringify(error, null, 2)}`);
				});
			});
	}

	create(login : string, email : string, password : string) {
		return this.createSha(login, email, SHA512(password));
	}
	createSha(login : string, email : string, password : string) {
		let data = {
			method: 'v?',
			login: login,
			email: email,
			password: password
		};
		console.log(`call users data=${ JSON.stringify(data, null, 2)}`);

		if(this.identificationVersion === 1) {
			data.method = 'v1';
		}

		return new Promise((resolve, reject) => {
			this.http.requestJson({
			    	server: 'karauth',
					endPoint: 'users',
					requestType: HTTPRequestModel.POST,
					accept: HTTPMimeType.JSON,
					contentType: HTTPMimeType.JSON,
					body: data,
				}).then((response: ModelResponseHttp) =>{
					// TODO: check type ...
					console.log(`createSha : get some data to check: ${JSON.stringify(response.data)}`)
					resolve(response.data);
				}).catch((error:any) => {
					reject(`return ERROR ${ JSON.stringify(error, null, 2)}`);
				});
			});
	}

	isAuthenticated():boolean {
		// return !!Session.userId;
		return false;
	}
	isAuthorized(authorizedRoles: string): boolean {
		/*
		if (!angular.isArray(_authorizedRoles)) {
			authorizedRoles = [_authorizedRoles];
		}
		return (    authService.isAuthenticated()
		         && _authorizedRoles.indexOf(Session.userRole) !== -1
		       );
		*/
		return false;
	}
}