package main

import (
	"git.binarythought.com/cdramey/sdb"
	"fmt"
	"io/ioutil"
	"os"
	"flag"
)

func main() {
	flags := flag.NewFlagSet("sdb", flag.ExitOnError)
	flags.SetOutput(os.Stdout)
	flags.Usage = func() {
		fmt.Fprintf(flags.Output(),
			"Usage: %s [OPTION] <files> ...\nOptions:\n",
			os.Args[0])
		flags.PrintDefaults()
	}

	plonly := flags.Bool("payload", false, "only return the payload")

	flags.Parse(os.Args[1:])

	if flags.NArg() < 1 {
		fmt.Fprintf(os.Stderr, "files parameter cannot be empty\n")
		os.Exit(1)
	}

	for _, fn := range flags.Args() {
		raw, err := ioutil.ReadFile(fn)
		if err != nil {
			fmt.Fprintf(os.Stderr,
				"error reading \"%s\": %s\n",
				fn, err.Error())
			continue
		}

		data, err := sdb.ParseSDB(raw)
		if err != nil {
			fmt.Fprintf(os.Stderr,
				"%s\n", err.Error())
			continue
		}

		if *plonly {
			for _, i := range data.Elements {
				switch v := i.(type) {
					case sdb.MOPayload:
						os.Stdout.Write(v.Payload)
				}
			}
		} else {
			fmt.Printf("Protocol Revision: %d\n",
				data.ProtocolRevision)
			fmt.Printf("Message Length: %d\n",
				data.Length)
			for c, i := range data.Elements {
				if c > 0 {
					fmt.Println()
				}
				switch v := i.(type) {
				case sdb.MOHeader:
					fmt.Printf("\tMO Header IEI: %d\n",
						v.IEI)
					fmt.Printf("\tMO Header Length: %d\n",
						v.Length)
					fmt.Printf("\tMO Header CDR Reference: %d\n",
						v.CDRReference)
					fmt.Printf("\tMO Header IMEI: %s\n",
						v.IMEI)
					fmt.Printf("\tMO Header Status: %s (%d)\n",
						v.StatusString(), v.Status)
					fmt.Printf("\tMO Header MOMSN: %d\n",
						v.MOMSN)
					fmt.Printf("\tMO Header MTMSN: %d\n",
						v.MTMSN)
					fmt.Printf("\tMO Header Session Time: %s\n",
						v.SessionTime().String())

				case sdb.MOPayload:
					fmt.Printf("\tMO Payload IEI: %d\n",
						v.IEI)
					fmt.Printf("\tMO Payload Length: %d\n",
						v.Length)

				case sdb.MOConfirmation:
					fmt.Printf("\tMO Confirmation IEI: %d\n",
						v.IEI)
					fmt.Printf("\tMO Confirmation Length: %d\n",
						v.Length)
					fmt.Printf("\tMO Confirmation Status: %d\n",
						v.Status)
				}
			}
		}
	}
}