var $ = require("jquery");


var Key = {
    UP: 38,
    DOWN: 40,
    PAGE_UP: 33,
    PAGE_DOWN: 34,
    HOME: 36,
    END: 35,
    LEFT: 37,
    RIGHT: 39,
    ENTER: 13,
    ESC: 27,
    TAB: 9,
    SPACE: 32,
    BACKSPACE: 8,
};
// Add A-Z
for (var i = 65; i <= 90; i++) {
    Key[String.fromCharCode(i)] = i;
}


var formatSize = function (bytes) {
    var size = bytes;
    var prefix = ["B", "KB", "MB", "GB", "TB"];
    var i = 0;
    while (Math.abs(size) >= 1024 && i < prefix.length - 1) {
        i++;
        size = size / 1024;
    }
    return (Math.floor(size * 100) / 100.0).toFixed(2) + prefix[i];
};


var formatTimeDelta = function (milliseconds) {
    var time = milliseconds;
    var prefix = ["ms", "s", "min", "h"];
    var div = [1000, 60, 60];
    var i = 0;
    while (Math.abs(time) >= div[i] && i < div.length) {
        time = time / div[i];
        i++;
    }
    return Math.round(time) + prefix[i];
};


var formatTimeStamp = function (seconds) {
    var ts = (new Date(seconds * 1000)).toISOString();
    return ts.replace("T", " ").replace("Z", "");
};


function getCookie(name) {
    var r = document.cookie.match("\\b" + name + "=([^;]*)\\b");
    return r ? r[1] : undefined;
}
var xsrf = $.param({_xsrf: getCookie("_xsrf")});

//Tornado XSRF Protection.
$.ajaxPrefilter(function (options) {
    if (["post", "put", "delete"].indexOf(options.type.toLowerCase()) >= 0 && options.url[0] === "/") {
        if (options.data) {
            options.data += ("&" + xsrf);
        } else {
            options.data = xsrf;
        }
    }
});
// Log AJAX Errors
$(document).ajaxError(function (event, jqXHR, ajaxSettings, thrownError) {
    var message = jqXHR.responseText;
    console.error(message, arguments);
    EventLogActions.add_event(thrownError + ": " + message);
    window.alert(message);
});

module.exports = {
    formatSize: formatSize,
    formatTimeDelta: formatTimeDelta,
    formatTimeStamp: formatTimeStamp,
    Key: Key
};