var UTF_8 = require('./encoding/utf8');
var unicode = require('./encoding/unicode');
var mbcs = require('./encoding/mbcs');
var iso2022 = require('./encoding/iso2022');

var recognisers = [
    new UTF_8,
    new unicode.UTF_16BE,
    new unicode.UTF_16LE,
    new unicode.UTF_32BE,
    new unicode.UTF_32LE,
    new mbcs.sjis,
    new mbcs.big5,
    new mbcs.euc_jp,
    new mbcs.euc_kr,
    new mbcs.gb_18030,
    new iso2022.ISO_2022_JP,
    new iso2022.ISO_2022_KR,
    new iso2022.ISO_2022_CN
];

module.exports.detect = function(buffer) {

    var det = {
        fRawInput:   buffer,
        fRawLength:  buffer.length,
        fInputBytes: buffer,
        fInputLen:   buffer.length
    };

    var matches = [];
    for (var i = recognisers.length - 1; i >= 0; i--) {
        var recogniser = recognisers[i];
        matches.push(rec.match(det));
    };

    matches.sort(function(a, b) {
        return a.confidence - b.confidence;
    });

    return matches.pop().name;
};