var _ = require("lodash");

module.exports = Chan;

Chan.Type = {
	CHANNEL: "channel",
	LOBBY: "lobby",
	QUERY: "query"
};

var id = 0;

function Chan(attr) {
	_.merge(this, _.extend({
		id: id++,
		messages: [],
		name: "",
		topic: "",
		type: Chan.Type.CHANNEL,
		unread: 0,
		highlight: false,
		users: []
	}, attr));
}

Chan.prototype.sortUsers = function(irc) {
	var userModeSortPriority = {};
	irc.network.options.PREFIX.forEach(function(prefix, index) {
		userModeSortPriority[prefix.symbol] = index;
	});

	userModeSortPriority[""] = 99; // No mode is lowest

	this.users = this.users.sort(function(a, b) {
		if (a.mode === b.mode) {
			return a.name.toLowerCase() < b.name.toLowerCase() ? -1 : 1;
		}

		return userModeSortPriority[a.mode] - userModeSortPriority[b.mode];
	});
};

Chan.prototype.getMode = function(name) {
	var user = _.find(this.users, {name: name});
	if (user) {
		return user.mode;
	} else {
		return "";
	}
};

Chan.prototype.toJSON = function() {
	var clone = _.clone(this);
	clone.messages = clone.messages.slice(-100);
	return clone;
};