'use strict';

/**
 * @ngdoc directive
 * @name passmanApp.directive:passwordGen
 * @description
 * # passwordGen
 */

angular.module('passmanApp')
	.directive('passwordGen', function ($timeout,$window) {
		function Arcfour () {
			this.j = this.i = 0, this.S = []
		}
		function ARC4init (r) {
			var t, n, e;
			for (t = 0; 256 > t; ++t)this.S[t] = t
			for (t = n = 0; 256 > t; ++t)n = n + this.S[t] + r[t % r.length] & 255, e = this.S[t], this.S[t] = this.S[n], this.S[n] = e
			this.j = this.i = 0
		}
		function ARC4next () {
			var r;
			return this.i = this.i + 1 & 255, this.j = this.j + this.S[this.i] & 255, r = this.S[this.i], this.S[this.i] = this.S[this.j], this.S[this.j] = r, this.S[r + this.S[this.i] & 255]
		}
		function prng_newstate () {
			return new Arcfour
		}
		function generatePassword (r, t, n, e, o, i, p, g) {
			var _, a, s, f, d, h, u, l, c, v, w, y, m;
			if (void 0 === r && (r = 8 + get_random(0, 1)), r > 256 && (r = 256, document.getElementById("length").value = 256), i > 256 && (i = 256), void 0 === t && (t = !0), void 0 === n && (n = !0), void 0 === e && (e = !0), void 0 === o && (o = !1), void 0 === i && (i = 0), void 0 === p && (p = !1), void 0 === g && (g = !0), _ = 0, a = 0, s = 0, g && (_ = a = s = 1), f = [], n && _ > 0)for (d = 0; _ > d; d++)f[f.length] = "L"
			if (t && a > 0)for (d = 0; a > d; d++)f[f.length] = "U"
			if (e && i > 0)for (d = 0; i > d; d++)f[f.length] = "D"
			if (o && s > 0)for (d = 0; s > d; d++)f[f.length] = "S"
			for (; f.length < r;)f[f.length] = "A"
			for (f.sort(function () {
				return 2 * get_random(0, 1) - 1
			}), h = "", u = "abcdefghjkmnpqrstuvwxyz", p || (u += "ilo"), n && (h += u), l = "ABCDEFGHJKMNPQRSTUVWXYZ", p || (l += "ILO"), t && (h += l), c = "23456789", p || (c += "10"), e && (h += c), v = "!@#$%^&*", o && (h += v), w = "", y = 0; r > y; y++) {
				switch (f[y]) {
					case"L":
						m = u;
						break;
					case"U":
						m = l;
						break;
					case"D":
						m = c;
						break;
					case"S":
						m = v;
						break;
					case"A":
						m = h
				}
				d = get_random(0, m.length - 1), w += m.charAt(d)
			}
			return w
		}
		function rng_seed_int (r) {
			rng_pool[rng_pptr++] ^= 255 & r, rng_pool[rng_pptr++] ^= r >> 8 & 255, rng_pool[rng_pptr++] ^= r >> 16 & 255, rng_pool[rng_pptr++] ^= r >> 24 & 255, rng_pptr >= rng_psize && (rng_pptr -= rng_psize)
		}
		function rng_seed_time () {
			rng_seed_int((new Date).getTime())
		}
		function rng_get_byte () {
			if (null == rng_state) {
				for (rng_seed_time(), rng_state = prng_newstate(), rng_state.init(rng_pool), rng_pptr = 0; rng_pptr < rng_pool.length; ++rng_pptr)rng_pool[rng_pptr] = 0
				rng_pptr = 0
			}
			return rng_state.next()
		}
		function rng_get_bytes (r) {
			var t;
			for (t = 0; t < r.length; ++t)r[t] = rng_get_byte()
		}
		function SecureRandom () {
		}
		function get_random (r, t) {
			var n, e, o, i = t - r + 1
			for (rng_seed_time(), n = [], e = 0; 4 > e; e++)n[e] = 0
			for (rng_get_bytes(n), o = 0, e = 0; 4 > e; e++)o *= 256, o += n[e]
			return o %= i, o += r
		}
		function get_random_password (r, t) {
			var n;
			var pwlen, newpw;
			for ("number" != typeof r && (r = 12), "number" != typeof t && (t = 16), r > t && (n = r, r = t, t = n), pwlen = get_random(r, t), newpw = ""; newpw.length < pwlen;)newpw += String.fromCharCode(get_random(32, 127))
			return newpw
		}
		var rng_psize, rng_state, rng_pool, rng_pptr, t, z, crypt_obj, num, buf, i
		if (Arcfour.prototype.init = ARC4init, Arcfour.prototype.next = ARC4next, rng_psize = 256, null == rng_pool) {
			if (rng_pool = [], rng_pptr = 0, "undefined" != typeof navigator && "Netscape" == navigator.appName && navigator.appVersion < "5" && "undefined" != typeof window && window.crypto)for (z = window.crypto.random(32), t = 0; t < z.length; ++t)rng_pool[rng_pptr++] = 255 & z.charCodeAt(t)
			try {
				if (crypt_obj = null, "undefined" != typeof window && void 0 !== window.crypto ? crypt_obj = window.crypto : "undefined" != typeof window && void 0 !== window.msCrypto && (crypt_obj = window.msCrypto), void 0 !== crypt_obj && "function" == typeof crypt_obj.getRandomValues && rng_psize > rng_pptr)for (num = Math.floor((rng_psize - rng_pptr) / 2) + 1, buf = new Uint16Array(num), crypt_obj.getRandomValues(buf), i = 0; i < buf.length; i++)t = buf[i], rng_pool[rng_pptr++] = t >>> 8, rng_pool[rng_pptr++] = 255 & t
			} catch (e) {
			}
			for (; rng_psize > rng_pptr;)t = Math.floor(65536 * Math.random()), rng_pool[rng_pptr++] = t >>> 8, rng_pool[rng_pptr++] = 255 & t
			rng_pptr = 0, rng_seed_time()
		}
		SecureRandom.prototype.nextBytes = rng_get_bytes;

		return {
			scope: {
				model      : "=ngModel",
				length     : "@",
				placeholder: "@",
				settings: '=settings',
				callback: '&callback'
			},

			restrict: "E",
			replace : "true",
			template: "" +
			"<div  class=\"            pw-gen            \">" +
			"<div              class=\"input-group                                     \">" +
			"<input  ng-show=\"!passwordVisible\" type=\"password\" ng-disabled=\"disabled\"    class=\"form-control                                    \" ng-model=\"password\" placeholder=\"{{placeholder}}\">" +
			"<input  ng-show=\"passwordVisible\"  type=\"text\"      ng-disabled=\"disabled\"  class=\"form-control                                    \" ng-model=\"password\" placeholder=\"{{placeholder}}\">" +

			'<span class="generate_pw">' +
			'<div class="cell" tooltip="\'Generate password\'" ng-click="generatePasswordStart()"><i class="fa fa-refresh"></i></div>' +
			'<div class="cell" tooltip="\'Toggle password visibility\'" ng-click="toggleVisibility()"><i class="fa" ng-class="{\'fa-eye\': passwordVisible, \'fa-eye-slash\': !passwordVisible }"></i></div>' +
			'<div class="cell" tooltip="\'Copy password to clipboard\'"><i class="fa fa-clipboard" ngclipboard-success="onSuccess(e);" ngclipboard-error="onError(e);" ngclipboard data-clipboard-text="{{password}}"></i></div>' +
			"</button>" +
			"</div>" +
			"</div>",
			link: function(scope, elem, attrs, modelCtrl) {
				scope.callback = scope.callback();
				scope.$watch("model", function () {
					scope.password = scope.model;
				});
				scope.passwordVisible = false;
				scope.toggleVisibility = function(){
					scope.passwordVisible = !scope.passwordVisible;
				};

				scope.passwordNotNull = false;
				scope.$watch("password", function () {
					scope.model = scope.password;
					scope.password_repeat = scope.model;

					if(scope.password !== undefined && scope.password !== null && scope.password !== "") {
						scope.passwordNotNull = true;
					} else {
						scope.passwordNotNull = false;
					}
				});
				//
				scope.onSuccess = function(e) {
					//@TODO move OC.Notification to a service
					OC.Notification.showTemporary('Password copied to clipboard!');
					e.clearSelection();
				};

				scope.onError = function(e) {
					OC.Notification.showTemporary('Press Ctrl+C to copy!');
				}
				scope.progressDivShow = false;
				scope.generatePasswordStart = function() {
					scope.progressDivShow = true;
					scope.progressValue = 0;
					scope.progressWidth = {"width": scope.progressValue + "%"};
					scope.generatePasswordProgress();
				};
				scope.generatePasswordProgress = function() {
					$timeout(function() {
						if(scope.progressValue < 100) {
							scope.password = scope._generatePassword(scope.settings);
							scope.progressValue += 10;
							scope.progressWidth = {"width": scope.progressValue + "%"};
							scope.disabled = true;
							scope.generatePasswordProgress();
						} else {
							scope.disabled = false;
							if(scope.callback) {
								scope.callback(scope.password)
							}
						}
					}, 10);
				};


				scope._generatePassword = function (settings) {
					var _settings = {
						'length': 12,
						'useUppercase': true,
						'useLowercase': true,
						'useDigits': true,
						'useSpecialChars': true,
						'minimumDigitCount': 3,
						'avoidAmbiguousCharacters': false,
						'requireEveryCharType': true
					};
					settings = angular.merge(_settings, settings);
					var password = generatePassword(settings['length'],
													settings.useUppercase,
													settings.useLowercase,
													settings.useDigits,
													settings.useSpecialChars,
													settings.minimumDigitCount,
													settings.avoidAmbiguousCharacters,
													settings.requireEveryCharType);
					return password;
				};
			}
		};
	});