/**
 * This module is for utility functions for Firebase
 * For standard operations you can just use require("firebase") directly.
 * 
 * This is meant for more complex functions like uploading/downloading a validation/rule set
 */

/// <reference path="../types/node.d.ts" />
export var Firebase = require('firebase');
export var sandbox = new exports.Firebase(require('../properties.js').FIREBASE_LOCATION);
export var FIREBASE_SECRET = require('../properties.js').FIREBASE_SECRET;
export var FIREBASE_LOCATION = require('../properties.js').FIREBASE_LOCATION;

/**
 * uploads the validation rules (representated as a string)
 * returns a deferred object, the error handler is called if the upload is rejected (e.g. invalid rules)
 */
export function setValidationRules(rules_str, cb){
	//console.log("\n setValidationRules: ", rules_str);
	//http://stackoverflow.com/questions/18840080/updating-firebase-security-rules-through-firebaseref-set
	var https = require('https');	
	
	//equivelent of curl -X PUT -d '{ "rules": { ".read": true } }' https://SampleChat.firebaseio-demo.com/.settings/rules.json?auth=FIREBASE_SECRET
	var options = {
	  hostname: FIREBASE_LOCATION,
	  port: 443,
	  path: '/.settings/rules.json?auth='+FIREBASE_SECRET,
	  method: 'PUT'
	};
	
	var req = https.request(options, function(res) {
	  //console.log("statusCode: ", res.statusCode);
	  //console.log("headers: ", res.headers);

	  res.on('data', function(d) {
		process.stdout.write(d);
		var data =  JSON.parse(d); //check the return json's status that Firebase writes


		if (data.status == "ok"){
			//so Firebase says it uploaded ok
            cb(null);
		} else {
            //went wrong
	        cb (data);
		}		
	  });
	});
	
	req.write( rules_str , 'utf8' );//write the actual rules in the request payload
	req.end();

	req.on('error', function(e) {
	  console.error(e);//the whole request went bad which is not a good
	  cb(e, null);
	});
}

export function assertSetValidationRules(rules_str, test, cb){
    setValidationRules(rules_str, function(err){
        if (err) {
            test.ok(false);
        } else {
            test.ok(true);
        }
        cb(err);
    })
}

/**
 * retreives the validation rules (representated as a string)
 * returns a deferred object, with the rules being the data payload
 */
export function getValidationRules(rules_str, cb){
	console.log("\n getValidationRules");
	//http://stackoverflow.com/questions/18840080/updating-firebase-security-rules-through-firebaseref-set
	var https = require('https');	
	
	//curl https://SampleChat.firebaseio-demo.com/.settings/rules.json?auth=FIREBASE_SECRET
	var options = {
	  hostname: FIREBASE_LOCATION,
	  port: 443,
	  path: '/.settings/rules.json?auth='+FIREBASE_SECRET,
	  method: 'GET'
	};
	
	var req = https.request(options, function(res) {
	  console.log("statusCode: ", res.statusCode);
	  console.log("headers: ", res.headers);

	  res.on('data', function(d) {
		var data = d.toString();
		console.log("\n", data);
		cb(null, data);
	  });
	});
	
	req.end();

	req.on('error', function(e) {
	  console.error(e);//the whole request went bad which is not a good
	  cb(e, null);
	});
}

export function getAuthToken(username, admin, simulate){
    var FBTokenGenMod = require('firebase-token-generator');
    var FBTokenGenerator = new FBTokenGenMod(FIREBASE_SECRET);
    return FBTokenGenerator.createToken({ username: username }, {admin: admin, simulate:simulate});
}

export function login(AUTH_TOKEN, cb){
    sandbox.auth(AUTH_TOKEN, cb);
}

/**
 * login to sandbox with the given username, and boolean option to be an admin
 * @param username
 * @param admin boolean, should the login be granted blanket read and write access??
 * @return {*}
 */
export function loginAs(username, admin, cb){
    login(exports.getAuthToken(username, admin), cb);
}

/**
 * login to sandbox with the given username, and boolean option to be an admin
 * @param username
 * @param admin boolean, should the login be granted blanket read and write access??
 * @return {*}
 */
export function simulateLoginAs(username, admin, cb){
    login(exports.getAuthToken(username, admin, true), cb);
}