'use strict';

//Const
var VALID_DOCTYPE_NAME = 'html',
    QUIRKS_MODE_SYSTEM_ID = 'http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd',
    QUIRKS_MODE_PUBLIC_ID_PREFIXES = [
        "+//silmaril//dtd html pro v0r11 19970101//en",
        "-//advasoft ltd//dtd html 3.0 aswedit + extensions//en",
        "-//as//dtd html 3.0 aswedit + extensions//en",
        "-//ietf//dtd html 2.0 level 1//en",
        "-//ietf//dtd html 2.0 level 2//en",
        "-//ietf//dtd html 2.0 strict level 1//en",
        "-//ietf//dtd html 2.0 strict level 2//en",
        "-//ietf//dtd html 2.0 strict//en",
        "-//ietf//dtd html 2.0//en",
        "-//ietf//dtd html 2.1e//en",
        "-//ietf//dtd html 3.0//en",
        "-//ietf//dtd html 3.0//en//",
        "-//ietf//dtd html 3.2 final//en",
        "-//ietf//dtd html 3.2//en",
        "-//ietf//dtd html 3//en",
        "-//ietf//dtd html level 0//en",
        "-//ietf//dtd html level 0//en//2.0",
        "-//ietf//dtd html level 1//en",
        "-//ietf//dtd html level 1//en//2.0",
        "-//ietf//dtd html level 2//en",
        "-//ietf//dtd html level 2//en//2.0",
        "-//ietf//dtd html level 3//en",
        "-//ietf//dtd html level 3//en//3.0",
        "-//ietf//dtd html strict level 0//en",
        "-//ietf//dtd html strict level 0//en//2.0",
        "-//ietf//dtd html strict level 1//en",
        "-//ietf//dtd html strict level 1//en//2.0",
        "-//ietf//dtd html strict level 2//en",
        "-//ietf//dtd html strict level 2//en//2.0",
        "-//ietf//dtd html strict level 3//en",
        "-//ietf//dtd html strict level 3//en//3.0",
        "-//ietf//dtd html strict//en",
        "-//ietf//dtd html strict//en//2.0",
        "-//ietf//dtd html strict//en//3.0",
        "-//ietf//dtd html//en",
        "-//ietf//dtd html//en//2.0",
        "-//ietf//dtd html//en//3.0",
        "-//metrius//dtd metrius presentational//en",
        "-//microsoft//dtd internet explorer 2.0 html strict//en",
        "-//microsoft//dtd internet explorer 2.0 html//en",
        "-//microsoft//dtd internet explorer 2.0 tables//en",
        "-//microsoft//dtd internet explorer 3.0 html strict//en",
        "-//microsoft//dtd internet explorer 3.0 html//en",
        "-//microsoft//dtd internet explorer 3.0 tables//en",
        "-//netscape comm. corp.//dtd html//en",
        "-//netscape comm. corp.//dtd strict html//en",
        "-//o'reilly and associates//dtd html 2.0//en",
        "-//o'reilly and associates//dtd html extended 1.0//en",
        "-//spyglass//dtd html 2.0 extended//en",
        "-//sq//dtd html 2.0 hotmetal + extensions//en",
        "-//sun microsystems corp.//dtd hotjava html//en",
        "-//sun microsystems corp.//dtd hotjava strict html//en",
        "-//w3c//dtd html 3 1995-03-24//en",
        "-//w3c//dtd html 3.2 draft//en",
        "-//w3c//dtd html 3.2 final//en",
        "-//w3c//dtd html 3.2//en",
        "-//w3c//dtd html 3.2s draft//en",
        "-//w3c//dtd html 4.0 frameset//en",
        "-//w3c//dtd html 4.0 transitional//en",
        "-//w3c//dtd html experimental 19960712//en",
        "-//w3c//dtd html experimental 970421//en",
        "-//w3c//dtd w3 html//en",
        "-//w3o//dtd w3 html 3.0//en",
        "-//w3o//dtd w3 html 3.0//en//",
        "-//webtechs//dtd mozilla html 2.0//en",
        "-//webtechs//dtd mozilla html//en"
    ],
    QUIRKS_MODE_NO_SYSTEM_ID_PUBLIC_ID_PREFIXES = [
        '-//w3c//dtd html 4.01 frameset//',
        '-//w3c//dtd html 4.01 transitional//'
    ],
    QUIRKS_MODE_PUBLIC_IDS = [
        '-//w3o//dtd w3 html strict 3.0//en//',
        '-/w3c/dtd html 4.0 transitional/en',
        'html'
    ];

exports.isQuirks = function (name, publicId, systemId) {
    if (name !== VALID_DOCTYPE_NAME)
        return true;

    if (systemId && systemId.toLowerCase() === QUIRKS_MODE_SYSTEM_ID)
        return true;

    if (publicId !== null) {
        publicId = publicId.toLowerCase();

        if (QUIRKS_MODE_PUBLIC_IDS.indexOf(publicId) > -1)
            return true;

        var prefixes = QUIRKS_MODE_PUBLIC_ID_PREFIXES;

        if (systemId === null)
            prefixes = prefixes.concat(QUIRKS_MODE_NO_SYSTEM_ID_PUBLIC_ID_PREFIXES);

        for (var i = 0; i < prefixes.length; i++) {
            if (publicId.indexOf(prefixes[i]) === 0)
                return true;
        }
    }

    return false;
};
