var VnObject = require ('./object');

/**
 * Readable data model.
 */
var Klass = new Class ();
module.exports = Klass;

var Status =
{
	 CLEAN    : 1
	,LOADING  : 2
	,READY    : 3
	,ERROR    : 4
};

var SortWay =
{
	 ASC   : 1
	,DESC  : 2 
};

Klass.extend
({
	 Status: Status
	,SortWay: SortWay
});

Klass.implement
({
	Extends: VnObject
	,Properties:
	{
		/**
		 * The number of rows in the model.
		 */
		numRows:
		{
			type: Number
		},
		/**
		 * The current status of the model.
		 */
		status:
		{
			type: Number
		},
		/**
		 * Checks if the model data is ready.
		 */
		ready:
		{
			type: Boolean
		}
	}

	/**
	 * Checks if the column exists.
	 *
	 * @param {integer} column The column index
	 * @return {Boolean} %true if column exists, %false otherwise
	 */
	,checkColExists: function () {}

	/**
	 * Checks if the row exists.
	 *
	 * @param {integer} rowIndex The row index
	 * @return {Boolean} %true if row exists, %false otherwise
	 */
	,checkRowExists: function () {}
	
	/**
	 * Get the index of the column from its name.
	 *
	 * @param {string} columnName The column name
	 * @return {number} The column index or -1 if column not exists
	 */
	,getColumnIndex: function () {}
	
	/**
	 * Gets a value from the model.
	 *
	 * @param {number} rowIndex The row index
	 * @param {String} columnName The column name
	 * @return {*} The value, or %undefined
	 */
	,get: function () {}

	/**
	 * Gets a value using the column index.
	 *
	 * @param {number} rowIndex The row index
	 * @param {number} column The column index
	 * @return {*} The value
	 */
	,getByIndex: function () {}

	/**
	 * Gets a row as an object  using the column index.
	 *
	 * @param {number} rowIndex The row index
	 * @return {Object} The row as an object
	 */
	,getObject: function () {}

	/**
	 * Orders the model by the specified column name.
	 *
	 * @param {Number} column The column name
	 * @param {SortWay} way The sort way
	 */
	,sortByName: function () {}

	/**
	 * Orders the model by the specified column.
	 *
	 * @param {Number} column The column index
	 * @param {SortWay} way The sort way
	 */
	,sort: function () {}

	/**
	 * Searchs a value on the model and returns the row index of the first
	 * ocurrence.
	 * If an index have been built on that column, it will be used, for more
	 * information see the indexColumn() method.
	 *
	 * @param {String} column The column name
	 * @param {Object} value The value to search
	 * @return {Number} The column index
	 */
	,search: function () {}

	/**
	 * Searchs a value on the model and returns the row index of the first
	 * ocurrence.
	 *
	 * @param {Number} col The column index
	 * @param {Object} value The value to search
	 * @return {Number} The column index
	 */
	,searchByIndex: function () {}

	/**
	 * Builds an internal hash index for the specified column, this speeds
	 * significantly searches on that column, specially when model has a lot of
	 * rows.
	 *
	 * FIXME: Not fully implemented.
	 *
	 * @param {String} column The column name
	 */
	,indexColumn: function () {}
});