/*
 * CakePHP jQuery Validation Plugin
 * Copyright (c) 2009 Matt Curry
 * www.PseudoCoder.com
 * http://github.com/mcurry/cakephp_plugin_validation
 * http://sandbox2.pseudocoder.com/demo/validation
 *
 * @author      mattc <matt@pseudocoder.com>
 * @license     MIT
 *
 */

(function($) {
	$.fn.validate = function(rules, opts) {
		options = $.extend({watch: []}, opts);

		$.each(options.watch,
		function(fieldId) {
			$("#" + options.watch[fieldId]).change(function() {
				$.fn.validate.ajaxField($(this));
			});
		});

		return this.each(function() {
			$this = $(this);
			$this.submit(function() {
				return $.fn.validate.check(rules);
			});
		});
	};

	$.fn.validate.check = function(rules) {
		var errors = [];
		var val = null;

		$.fn.validate.beforeFilter();

		$.each(rules,
		function(field) {
			$field = $("#" + field);
			if ($field.attr("type") == "checkbox") {
				if ($field.filter(":checked").length > 0) {
					val = $field.filter(":checked").val();
				} else {
					val = "0";
				}
			} else {
				val = $field.val();
			}

			var fieldName = $field.attr('name');
			if (typeof val == "string") {
				val = $.trim(val);
			}

			$.each(this,
			function() {
				//field doesn't exist...skip
				if ($("#" + field).attr("id") == undefined) {
					return true;
				}

				if (this['allowEmpty'] && typeof val == "string" && val == '') {
					return true;
				}

				if (this['allowEmpty'] && typeof val == "object" && val == null) {
					return true;
				}

				if (!$.fn.validate.validateRule(val, this['rule'], this['negate'], fieldName)) {
					errors.push(this['message']);
					$.fn.validate.setError(field, this['message']);

					if (this['last'] === true) {
						return false;
					}
				}
			});
		});

		$.fn.validate.afterFilter(errors);

		if (errors.length > 0) {
			return false;
		}

		return true;
	}

	$.fn.validate.validateRule = function(val, rule, negate, fieldName) {
		if (negate == undefined) {
			negate = false;
		}

		//handle custom functions
		if (typeof rule == 'object') {
			if ($.fn.validate[rule.rule] != undefined) {
				return $.fn.validate[rule.rule](val, rule.params, fieldName);
			} else {
				return true;
			}
		}

		//handle regex rules
		if (negate && val.match(eval(rule))) {
			return false;
		} else if (!negate && !val.match(eval(rule))) {
			return false;
		}

		return true;
	};

	$.fn.validate.boolean = function(val) {
		return $.fn.validate.inList(val, [0, 1, '0', '1', true, false]);
	};

	$.fn.validate.comparison = function(val, params) {
		if (val == "") {
			return false;
		}

		val = Number(val);
		if (val == "NaN") {
			return false;
		}

		if (eval(val + params[0] + params[1])) {
			return true;
		}

		return false;
	};

	$.fn.validate.inList = function(val, params) {
		if (params != null) {
			if ($.inArray(val, params) == -1) {
				return false;
			}
		}

		return true;
	};

	$.fn.validate.multiple = function(val, params) {
		if (typeof val != "object" || val == null) {
			return false;
		}

		if (params.min != null && val.length < params.min) {
			return false;
		}
		if (params.max != null && val.length > params.max) {
			return false;
		}

		if (params["in"] != null) {
			for (i = 0; i < params["in"].length; i++) {
				if ($.inArray(params["in"][i], val) == -1) {
					return false;
				}
			}
		}

		return true;
	};

	$.fn.validate.notEmpty = function(val, params) {
		if (typeof val == "string" && val == "") {
			return false;
		}

		if (typeof val == "object" && val.length == 0) {
			return false;
		}

		return true;
	}

	$.fn.validate.range = function(val, params) {
		if (val < parseInt(params[0])) {
			return false;
		}
		if (val > parseInt(params[1])) {
			return false;
		}

		return true;
	};

	$.fn.validate.ajaxField = function($field) {
		$.fn.validate.clearError($field);
		$.fn.validate.ajaxBeforeFilter($field);

		var data = new Object;
		data[$field.attr("name")] = $field.val();
		$.post(options.root + "js_validate/field/" + $field.attr("id"), data,
		function(validates) {
			$.fn.validate.ajaxAfterFilter($("#" + validates.field));
			if (!validates.result) {
				$.fn.validate.setError(validates.field, validates.message);
			}
		},
		"json");
	}

	$.fn.validate.ajaxBeforeFilter = function($field) {
		$field.after("<img class=\"ajax-loader\" src=\"" + options.root + "js_validate/img/ajax-loader.gif\">");
	}

	$.fn.validate.ajaxAfterFilter = function($field) {
		$field.siblings(".ajax-loader").remove();
	}

	$.fn.validate.clearError = function($field) {
		if (typeof $field == "string") {
			$field = $("#" + field);
		}

		$field.removeClass("form-error").parents("div:first").removeClass("error").children(".error-message").remove();
	}

	$.fn.validate.setError = function(field, message) {
		$("#" + field).addClass("form-error").parents("div:first").addClass("error").append('<div class="error-message">' + message + '</div>');
	};

	$.fn.validate.beforeFilter = function() {
		if (options.messageId != null) {
			$("#" + options.messageId).html("").slideDown();
		}

		$(".error-message").remove();
		$("input").removeClass("form-error");
		$("div").removeClass("error")
	};

	$.fn.validate.afterFilter = function(errors) {
		if (options.messageId != null) {
			$("#" + options.messageId).html(errors.join("<br />")).slideDown();
		}
	};
})(jQuery);