/*
   Copyright (c)  2014 IOnU Security Inc. All rights reserved
   Created May 2014 by Kendrick Webster

   K2Proxy/config.js - application settings
*/
"use strict";

var fs = require('fs'),
    json = require('./json');;

function trace(m) { // comment or un-comment as needed for debugging:
    console.log(m);
}
function trace_info(m) { // comment or un-comment as needed for debugging:
    console.log(m);
}

var CONF_JSON_MAX_LENGTH = 256 * 1024;
var listenPort = 8888;
var daemonHost = 'localhost';
var daemonPort = 32000;

// read and parse /sequencelogic/config/$SEQUENCE_LOGIC_ENV.conf.json
if (typeof process.env.SEQUENCE_LOGIC_ENV === "string") {
    var env = process.env.SEQUENCE_LOGIC_ENV;
    trace_info('SEQUENCE_LOGIC_ENV = "' + env + '"');

    var fname = '/sequencelogic/config/' + env + '.conf.json';
    var fstr;
    try {
        var fd = fs.openSync(fname, 'r');
        var buf = new Buffer(CONF_JSON_MAX_LENGTH);
        var n = fs.readSync(fd, buf, 0, CONF_JSON_MAX_LENGTH, null);
        fstr = buf.slice(0, n).toString('utf8');
    } catch (e) {
        trace_info('Unable to read ' + fname + ':');
        trace_info(e);
    }

    if (fstr && fstr.length) {
        trace_info('Reading ' + fname + ', ' + fstr.length + ' bytes');
        try {
            var conf = JSON.parseMore(fstr);
            if (typeof conf.K2Proxy === 'object') {
                var c = conf.K2Proxy;
                if (typeof c.listenPort === 'string') {
                    trace_info('   listenPort = "' + c.listenPort + '"');
                    listenPort = +c.listenPort;
                }
                if (typeof c.daemonHost === 'string') {
                    trace_info('   daemonHost = "' + c.daemonHost + '"');
                    daemonHost = c.daemonHost;
                }
                if (typeof c.daemonPort === 'string') {
                    trace_info('   daemonPort = "' + c.daemonPort + '"');
                    daemonPort = +c.daemonPort;
                }
            } else {
                trace_info('Config file lacks a K2Proxy section: ' + fname);
            }
        } catch (e) {
            trace_info('Unable to parse ' + fname + ':');
            trace_info(e);
        }
    } else {
        trace_info('WARNING: config file is empty: ' + fname);
    }
} else {
    trace_info('SEQUENCE_LOGIC_ENV is not set, skipping conf.json parsing');
}

trace_info("command-line:");
process.argv.forEach(function (val, index, array) {
    trace_info('   ' + index + ': ' + val);
    switch (index) {
    case 2:
        listenPort = +val;
        break;
    case 3:
        daemonHost = val;
        break;
    case 4:
        daemonPort = +val;
        break;
    }
});

exports.listenPort = listenPort;
exports.daemonHost = daemonHost;
exports.daemonPort = daemonPort;