var Quantities = Quantities || (function() {
    'use strict';

    var version = "0.1a",

    updateHandout = function() {
        // Party owns ...
        var str = "The party has:\n";
        for (var key in state.quantities) {
            if (state.quantities.hasOwnProperty(key)) {
                str += state.quantities[key] + " " + key + "\n";
            }
        }

        //Does handout exist?
        var handout = findObjs({
            _type: 'handout',
            name: 'Quantities',
        })[0];

        if(!handout) {
            // create handout
            handout = createObj('handout', {
                    name: 'Quantities',
                    notes: str,
                    inplayerjournals: 'all',
                });
        }

        handout.set("notes", str);
    },

    getQuantity = function(quantity) {
        // Does property exist?
        if (!(state.quantities.hasOwnProperty(quantity))) {
            sendChat("Quantities", "This quantity does not exist, did you mean to type !quantity " + quantity.toString() + " [num]");
            return null;
        } else {
            sendChat("Quantities", "The party has " + state.quantities[quantity] + " " + quantity);
        }
    },


    setQuantity = function(quantity, n, who) {
        if(isNaN(n)) {
            sendChat("Quantities", "Quantities must be set to a numerical value");
            return null;
        }

        if(n === "0") {
            delete(state.quantities[quantity]);
        } else if ((n.charAt(0) === '+') || (n.charAt(0) === '-')) {
            state.quantities[quantity] = (Number(state.quantities[quantity]) + Number(n)).toString();
        } else {
            state.quantities[quantity] = n.toString();
        }

        sendChat("Quantities",  "/w " + who + quantity + " set to " + state.quantities[quantity]);

        updateHandout();
    },

    printQuantities = function() {
        var str = "&{template:default} {{name=Party Supplies}}";

        for (var key in state.quantities) {
            if (state.quantities.hasOwnProperty(key)) {
                str += " {{" + key + "=" + state.quantities[key] + "}}";
            }
        }
        sendChat("Quantities", str);
    },

    initialise = function() {
        log("Initialising Quantities v0.1a");

        on("chat:message", function(msg) {
            var args = msg.content.split(/\s+/);

            if(msg.type == "api" && ((args[0] == "!quantity") || (args[0] == "!q"))) {

                if (args.length == 3) {
                    setQuantity(args[1], args[2], msg.who);
                } else if (args.length == 2) {
                    getQuantity(args[1]);
                } else if (args.length == 1) {
                    printQuantities();
                }else {
                    sendChat("Quantities", "Incorrect number of arguments");
                    return null;
                }
            }
        });
    };

    return {
        initialise: initialise
    };
}());

on("ready", function() {
    log("Ready for Quantities");
    if (!state.hasOwnProperty("quantities")) {
        state["quantities"] = {};
    }

    Quantities.initialise();
});