'use strict';

var async = require('async'),
	db = require('../database'),
	privileges = require('../privileges'),
	utils = require('../../public/src/utils');

module.exports = function(Categories) {

	Categories.create = function(data, callback) {
		db.incrObjectField('global', 'nextCid', function(err, cid) {
			if (err) {
				return callback(err);
			}

			var slug = cid + '/' + utils.slugify(data.name),
				order = data.order || cid,	// If no order provided, place it at the end
				colours = Categories.assignColours();

			var category = {
				cid: cid,
				name: data.name,
				description: ( data.description ? data.description : '' ),
				icon: ( data.icon ? data.icon : '' ),
				bgColor: data.bgColor || colours[0],
				color: ( data.color ? data.color : '' ),
				slug: slug,
				parentCid: ( data.parentCid ? data.parentCid : 0 ),
				topic_count: 0,
				post_count: 0,
				disabled: 0,
				order: order,
				link: '',
				numRecentReplies: 1,
				class: ( data.class ? data.class : 'col-md-3 col-xs-6' ),
				imageClass: 'auto'
			};

			var defaultPrivileges = ['find', 'read', 'topics:create', 'topics:reply'];

			async.series([
				async.apply(db.setObject, 'category:' + cid, category),
				async.apply(db.sortedSetAdd, 'categories:cid', order, cid),
				async.apply(privileges.categories.give, defaultPrivileges, cid, 'administrators'),
				async.apply(privileges.categories.give, defaultPrivileges, cid, 'registered-users'),
				async.apply(privileges.categories.give, ['find', 'read'], cid, 'guests')
			], function(err) {
				if (err) {
					return callback(err);
				}

				callback(null, category);
			});
		});
	};

	Categories.assignColours = function() {
		var backgrounds = ['#AB4642', '#DC9656', '#F7CA88', '#A1B56C', '#86C1B9', '#7CAFC2', '#BA8BAF', '#A16946'],
			text = ['#fff', '#fff', '#333', '#fff', '#333', '#fff', '#fff', '#fff'],
			index = Math.floor(Math.random() * backgrounds.length);

		return [backgrounds[index], text[index]];
	};
};