/*global console: false */
/*jslint onevar: false */
// Released under the MIT/X11 license
// http://www.opensource.org/licenses/mit-license.php
"use strict";
// ==============================================================
/**
 * get parameters of URL as an object (name, value)
 */
function getParamsFromURL (url, base) {
    if (!url || (url.toString().length === 0)) {
        throw new Error("Missing URL value!");
    }

    var aElem = document.createElement("a");
    aElem.href = url;

    var paramsArr = url.pathname.split("?");
    if (paramsArr.length === 1) {
        return {};
    }

    // get convert URL parameters to an Object
    var params = {}, s = [];
    paramsArr[1].split('&').forEach(function(par) {
        s = par.split('=');
        params[s[0]] = s[1];
    });
    return params;
}

/**
 * parse XML object out of string working around various bugs in Gecko implementation
 * see https://developer.mozilla.org/en/E4X for more information
 *
 * @param inStr String with unparsed XML string
 * @return XML object
 */
function parseXMLfromString (inStuff) {
    // if (typeof inStuff !== 'string') In future we should recognize this.response
    // and get just .text property out of it. TODO
    var respStr = inStuff.replace(/^<\?xml\s+version\s*=\s*(["'])[^\1]+\1[^?]*\?>/, ""); // bug 336551
    return new XML(respStr);
}

/**
 * Get a bug no
 */
function getBugNo() {
    return document.forms.namedItem('changeform').getElementsByName("id")[0].value;
}

/**
 * Get a bug no from URL ... fails with aliases
 * @param url String with URL to be analyzed
 * @return String with the bug ID
 */
function getBugNoFromURL(url) {
    var params = getParamsFromURL(url);
    if (params && params.id) {
        return params.id;
    }
}

/**
 * format date to be in ISO format (just day part)
 *
 * @param date
 * @return string with the formatted date
 */
function getISODate(dateStr) {
    function pad(n) {
        return n < 10 ? '0' + n : n;
    }
    var date = new Date(dateStr);
    return date.getFullYear() + '-' + pad(date.getMonth() + 1) + '-' +
            pad(date.getDate());
}

/**
 * Check whether an item is member of the list. Idea is just to make long if
 * commands slightly more readable.
 *
 * @param mbr string to be searched in the list
 * @param list list
 * @return position of the string in the list, or -1 if none found.
 */
function isInList(mbr, list) {
    if (!list) {
        return false;
    }
    return (list.indexOf(mbr) !== -1);
};

/**
 * Make sure value returned is Array
 *
 * @param Array/String
 * @return Array
 *
 * If something else than Array or String is passed to the function
 * the result will be untouched actual argument of the call.
 */
function valToArray(val) {
    var isArr = val &&
        val.constructor &&
        val.constructor.name === "Array";
    return isArr ? val : [val];
}

/**
 * Merges two comma separated string as a list and returns new string
 *
 * @param str String with old values
 * @param value String/Array with other values
 * @return String with merged lists
 */
function addCSVValue(str, value) {
    var parts = (str.trim().length > 0 ? str.split(/[,\s]+/) : []);
    if (!value) {
        return str;
    }
    if (!isInList(value, parts)) {
        var newValue = valToArray(value);
        parts = parts.concat(newValue);
    }
    // this is necessary to get comma-space separated string even when
    // value is an array already
    parts = parts.join(",").split(",");
    return parts.join(", ");
}

/**
 * Treats comma separated string as a list and removes one item from it
 *
 * @param str String treated as a list
 * @param value String with the value to be removed from str
 * @return String with the resulting list comma separated
 */
function removeCSVValue(str, value) {
    str = str.trim();
    var parts = str ? str.split(/[,\s]+/) : [];
    var valueArr = value instanceof Array ? value : value.split(/[,\s]+/);
    parts = parts.filter(function (e, i, a) {
        return (!isInList(e, valueArr));
    });
    return parts.join(", ");
}

/**
 * select element of the array where regexp in the first element matches second
 * parameter of this function
 *
 * @param list Array with regexps and return values
 * @param chosingMark String by which the element of array is to be matched
 * @return Object chosen element
 */
function filterByRegexp(list, chosingMark) {
    var chosenPair = [];
    if (list.length > 0) {
        chosenPair = list.filter(function (pair) {
            return new RegExp(pair.regexp, "i").test(chosingMark);
        });
    }
    if (chosenPair.length > 0) {
        return chosenPair[0].addr;
    } else {
        return "";
    }
}

/**
 * remove elements from the page based on their IDs
 *
 * @param doc Document object
 * @param target String/Array with ID(s)
 * @param remove Boolean indicating whether the node should be
 * actually removed or just hidden.
 * @return none
 * TODO remove parameter could be replaced by function which would
 * do actual activity.
 */
function killNodes(doc, target, remove) {
    target = target.trim();
    var targetArr = target instanceof Array ? target : target.split(/[,\s]+/);
    targetArr.forEach(function(x) {
        if (remove) {
            var targetNode = doc.getElementById(x);
            targetNode.parentNode.removeChild(targetNode);
        } else {
            x.style.display = "none";
        }
    });
}