/* jslint node: true */
'use strict';

//  deps
const _         = require('lodash');

const mimeTypes = require('mime-types');

exports.startup             = startup;
exports.resolveMimeType     = resolveMimeType;

function startup(cb) {
    //
    //  Add in types (not yet) supported by mime-db -- and therefor, mime-types
    //
    const ADDITIONAL_EXT_MIMETYPES = {
        ans             : 'text/x-ansi',
        gz              : 'application/gzip',   //  not in mime-types 2.1.15 :(
        lzx             : 'application/x-lzx',  //  :TODO: submit to mime-types
    };

    _.forEach(ADDITIONAL_EXT_MIMETYPES, (mimeType, ext) => {
        //  don't override any entries
        if(!_.isString(mimeTypes.types[ext])) {
            mimeTypes[ext] = mimeType;
        }

        if(!mimeTypes.extensions[mimeType]) {
            mimeTypes.extensions[mimeType] = [ ext ];
        }
    });

    return cb(null);
}

function resolveMimeType(query) {
    if(mimeTypes.extensions[query]) {
        return query;   //  already a mime-type
    }

    return mimeTypes.lookup(query) || undefined;    //  lookup() returns false; we want undefined
}