/* global userSettings */

/* exported getUserSetting, setUserSetting, deleteUserSetting */

// utility functions

var wpCookies = {

// The following functions are from Cookie.js class in TinyMCE 3, Moxiecode, used under LGPL.

	each: function( obj, cb, scope ) {

		var n, l;

		if ( ! obj ) {

			return 0;

		}

		scope = scope || obj;

		if ( typeof( obj.length ) !== 'undefined' ) {

			for ( n = 0, l = obj.length; n < l; n++ ) {

				if ( cb.call( scope, obj[n], n, obj ) === false ) {

					return 0;

				}

			}

		} else {

			for ( n in obj ) {

				if ( obj.hasOwnProperty(n) ) {

					if ( cb.call( scope, obj[n], n, obj ) === false ) {

						return 0;

					}

				}

			}

		}

		return 1;

	},

	/**

	 * Get a multi-values cookie.

	 * Returns a JS object with the name: 'value' pairs.

	 */

	getHash: function( name ) {

		var cookie = this.get( name ), values;

		if ( cookie ) {

			this.each( cookie.split('&'), function( pair ) {

				pair = pair.split('=');

				values = values || {};

				values[pair[0]] = pair[1];

			});

		}

		return values;

	},

	/**

	 * Set a multi-values cookie.

	 *

	 * 'values_obj' is the JS object that is stored. It is encoded as URI in wpCookies.set().

	 */

	setHash: function( name, values_obj, expires, path, domain, secure ) {

		var str = '';

		this.each( values_obj, function( val, key ) {

			str += ( ! str ? '' : '&' ) + key + '=' + val;

		});

		this.set( name, str, expires, path, domain, secure );

	},

	/**

	 * Get a cookie.

	 */

	get: function( name ) {

		var e, b,

			cookie = document.cookie,

			p = name + '=';

		if ( ! cookie ) {

			return;

		}

		b = cookie.indexOf( '; ' + p );

		if ( b === -1 ) {

			b = cookie.indexOf(p);

			if ( b !== 0 ) {

				return null;

			}

		} else {

			b += 2;

		}

		e = cookie.indexOf( ';', b );

		if ( e === -1 ) {

			e = cookie.length;

		}

		return decodeURIComponent( cookie.substring( b + p.length, e ) );

	},

	/**

	 * Set a cookie.

	 *

	 * The 'expires' arg can be either a JS Date() object set to the expiration date (back-compat)

	 * or the number of seconds until expiration

	 */

	set: function( name, value, expires, path, domain, secure ) {

		var d = new Date();

		if ( typeof( expires ) === 'object' && expires.toGMTString ) {

			expires = expires.toGMTString();

		} else if ( parseInt( expires, 10 ) ) {

			expires = d.toGMTString();

		} else {

			expires = '';

		}

		document.cookie = name + '=' + encodeURIComponent( value ) +

			( expires ? '; expires=' + expires : '' ) +

			( path    ? '; path=' + path       : '' ) +

			( domain  ? '; domain=' + domain   : '' ) +

			( secure  ? '; secure'             : '' );

	},

	/**

	 * Remove a cookie.

	 *

	 * This is done by setting it to an empty value and setting the expiration time in the past.

	 */

	remove: function( name, path, domain, secure ) {

		this.set( name, '', -1000, path, domain, secure );

	}

};

// Returns the value as string. Second arg or empty string is returned when value is not set.

function getUserSetting( name, def ) {

	var settings = getAllUserSettings();

	if ( settings.hasOwnProperty( name ) ) {

		return settings[name];

	}

	if ( typeof def !== 'undefined' ) {

		return def;

	}

	return '';

}

// Both name and value must be only ASCII letters, numbers or underscore

// and the shorter, the better (cookies can store maximum 4KB). Not suitable to store text.

// The value is converted and stored as string.

function setUserSetting( name, value, _del ) {

	if ( 'object' !== typeof userSettings ) {

		return false;

	}

	var uid = userSettings.uid,

		settings = wpCookies.getHash( 'wp-settings-' + uid ),

		path = userSettings.url,

		secure = !! userSettings.secure;

	if ( typeof value === 'number' ) {

		value = parseInt( value, 10 );

	} else {

	}

	settings = settings || {};

	if ( _del ) {

		delete settings[name];

	} else {

		settings[name] = value;

	}

	wpCookies.setHash( 'wp-settings-' + uid, settings, 31536000, path, '', secure );

	wpCookies.set( 'wp-settings-time-' + uid, userSettings.time, 31536000, path, '', secure );

	return name;

}

function deleteUserSetting( name ) {

	return setUserSetting( name, '', 1 );

}

// Returns all settings as js object.

function getAllUserSettings() {

	if ( 'object' !== typeof userSettings ) {

		return {};

	}

	return wpCookies.getHash( 'wp-settings-' + userSettings.uid ) || {};

}