/**
 * ### Unique plugin
 *
 * Enforces that no nodes with the same name can coexist as siblings.
 */
/*globals jQuery, define, exports, require */
(function (factory) {
	"use strict";
	if (typeof define === 'function' && define.amd) {
		define('jstree.unique', ['jquery','jstree'], factory);
	}
	else if(typeof exports === 'object') {
		factory(require('jquery'), require('jstree'));
	}
	else {
		factory(jQuery, jQuery.jstree);
	}
}(function ($, jstree, undefined) {
	"use strict";

	if($.jstree.plugins.unique) { return; }

	/**
	 * stores all defaults for the unique plugin
	 * @name $.jstree.defaults.unique
	 * @plugin unique
	 */
	$.jstree.defaults.unique = {
		/**
		 * Indicates if the comparison should be case sensitive. Default is `false`.
		 * @name $.jstree.defaults.unique.case_sensitive
		 * @plugin unique
		 */
		case_sensitive : false,
		/**
		 * A callback executed in the instance's scope when a new node is created and the name is already taken, the two arguments are the conflicting name and the counter. The default will produce results like `New node (2)`.
		 * @name $.jstree.defaults.unique.duplicate
		 * @plugin unique
		 */
		duplicate : function (name, counter) {
			return name + ' (' + counter + ')';
		}
	};

	$.jstree.plugins.unique = function (options, parent) {
		this.check = function (chk, obj, par, pos, more) {
			if(parent.check.call(this, chk, obj, par, pos, more) === false) { return false; }
			obj = obj && obj.id ? obj : this.get_node(obj);
			par = par && par.id ? par : this.get_node(par);
			if(!par || !par.children) { return true; }
			var n = chk === "rename_node" ? pos : obj.text,
				c = [],
				s = this.settings.unique.case_sensitive,
				m = this._model.data, i, j;
			for(i = 0, j = par.children.length; i < j; i++) {
				c.push(s ? m[par.children[i]].text : m[par.children[i]].text.toLowerCase());
			}
			if(!s) { n = n.toLowerCase(); }
			switch(chk) {
				case "delete_node":
					return true;
				case "rename_node":
					i = ($.inArray(n, c) === -1 || (obj.text && obj.text === n));
					if(!i) {
						this._data.core.last_error = { 'error' : 'check', 'plugin' : 'unique', 'id' : 'unique_01', 'reason' : 'Child with name ' + n + ' already exists. Preventing: ' + chk, 'data' : JSON.stringify({ 'chk' : chk, 'pos' : pos, 'obj' : obj && obj.id ? obj.id : false, 'par' : par && par.id ? par.id : false }) };
					}
					return i;
				case "create_node":
					i = ($.inArray(n, c) === -1);
					if(!i) {
						this._data.core.last_error = { 'error' : 'check', 'plugin' : 'unique', 'id' : 'unique_04', 'reason' : 'Child with name ' + n + ' already exists. Preventing: ' + chk, 'data' : JSON.stringify({ 'chk' : chk, 'pos' : pos, 'obj' : obj && obj.id ? obj.id : false, 'par' : par && par.id ? par.id : false }) };
					}
					return i;
				case "copy_node":
					i = ($.inArray(n, c) === -1);
					if(!i) {
						this._data.core.last_error = { 'error' : 'check', 'plugin' : 'unique', 'id' : 'unique_02', 'reason' : 'Child with name ' + n + ' already exists. Preventing: ' + chk, 'data' : JSON.stringify({ 'chk' : chk, 'pos' : pos, 'obj' : obj && obj.id ? obj.id : false, 'par' : par && par.id ? par.id : false }) };
					}
					return i;
				case "move_node":
					i = (obj.parent === par.id || $.inArray(n, c) === -1);
					if(!i) {
						this._data.core.last_error = { 'error' : 'check', 'plugin' : 'unique', 'id' : 'unique_03', 'reason' : 'Child with name ' + n + ' already exists. Preventing: ' + chk, 'data' : JSON.stringify({ 'chk' : chk, 'pos' : pos, 'obj' : obj && obj.id ? obj.id : false, 'par' : par && par.id ? par.id : false }) };
					}
					return i;
			}
			return true;
		};
		this.create_node = function (par, node, pos, callback, is_loaded) {
			if(!node || node.text === undefined) {
				if(par === null) {
					par = "#";
				}
				par = this.get_node(par);
				if(!par) {
					return parent.create_node.call(this, par, node, pos, callback, is_loaded);
				}
				pos = pos === undefined ? "last" : pos;
				if(!pos.toString().match(/^(before|after)$/) && !is_loaded && !this.is_loaded(par)) {
					return parent.create_node.call(this, par, node, pos, callback, is_loaded);
				}
				if(!node) { node = {}; }
				var tmp, n, dpc, i, j, m = this._model.data, s = this.settings.unique.case_sensitive, cb = this.settings.unique.duplicate;
				n = tmp = this.get_string('New node');
				dpc = [];
				for(i = 0, j = par.children.length; i < j; i++) {
					dpc.push(s ? m[par.children[i]].text : m[par.children[i]].text.toLowerCase());
				}
				i = 1;
				while($.inArray(s ? n : n.toLowerCase(), dpc) !== -1) {
					n = cb.call(this, tmp, (++i)).toString();
				}
				node.text = n;
			}
			return parent.create_node.call(this, par, node, pos, callback, is_loaded);
		};
	};

	// include the unique plugin by default
	// $.jstree.defaults.plugins.push("unique");
}));
