// Copyright 2012-2016 Apcera Inc. All rights reserved.

package main

import (
	"flag"
	"fmt"
	"os"

	"github.com/nats-io/gnatsd/server"
)

var usageStr = `
Usage: gnatsd [options]

Server Options:
    -a, --addr <host>                Bind to host address (default: 0.0.0.0)
    -p, --port <port>                Use port for clients (default: 4222)
    -P, --pid <file>                 File to store PID
    -m, --http_port <port>           Use port for http monitoring
    -ms,--https_port <port>          Use port for https monitoring
    -c, --config <file>              Configuration file
    -sl,--signal <signal>[=<pid>]    Send signal to gnatsd process (stop, quit, reopen, reload)

Logging Options:
    -l, --log <file>                 File to redirect log output
    -T, --logtime                    Timestamp log entries (default: true)
    -s, --syslog                     Log to syslog or windows event log
    -r, --remote_syslog <addr>       Syslog server addr (udp://localhost:514)
    -D, --debug                      Enable debugging output
    -V, --trace                      Trace the raw protocol
    -DV                              Debug and trace

Authorization Options:
        --user <user>                User required for connections
        --pass <password>            Password required for connections
        --auth <token>               Authorization token required for connections

TLS Options:
        --tls                        Enable TLS, do not verify clients (default: false)
        --tlscert <file>             Server certificate file
        --tlskey <file>              Private key for server certificate
        --tlsverify                  Enable TLS, verify client certificates
        --tlscacert <file>           Client certificate CA for verification

Cluster Options:
        --routes <rurl-1, rurl-2>    Routes to solicit and connect
        --cluster <cluster-url>      Cluster URL for solicited routes
        --no_advertise <bool>        Advertise known cluster IPs to clients
        --connect_retries <number>   For implicit routes, number of connect retries


Common Options:
    -h, --help                       Show this message
    -v, --version                    Show version
        --help_tls                   TLS help
`

// usage will print out the flag options for the server.
func usage() {
	fmt.Printf("%s\n", usageStr)
	os.Exit(0)
}

func main() {
	// Create a FlagSet and sets the usage
	fs := flag.NewFlagSet("nats-server", flag.ExitOnError)
	fs.Usage = usage

	// Configure the options from the flags/config file
	opts, err := server.ConfigureOptions(fs, os.Args[1:],
		server.PrintServerAndExit,
		fs.Usage,
		server.PrintTLSHelpAndDie)
	if err != nil {
		server.PrintAndDie(err.Error() + "\n" + usageStr)
	}

	// Create the server with appropriate options.
	s := server.New(opts)

	// Configure the logger based on the flags
	s.ConfigureLogger()

	// Start things up. Block here until done.
	if err := server.Run(s); err != nil {
		server.PrintAndDie(err.Error())
	}
}