/*
    Mosh: the mobile shell
    Copyright 2012 Keith Winstein

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include <stdlib.h>
#include <string.h>

#include "stmclient.h"
#include "crypto.h"

void usage( const char *argv0 ) {
  fprintf( stderr, "Usage: %s IP PORT\n", argv0 );
}

int main( int argc, char *argv[] )
{
  /* Get arguments */
  char *ip;
  int port;

  if ( argc != 3 ) {
    usage( argv[ 0 ] );
    exit( 1 );
  }

  ip = argv[ 1 ];
  port = myatoi( argv[ 2 ] );

  /* Read key from environment */
  char *env_key = getenv( "MOSH_KEY" );
  if ( env_key == NULL ) {
    fprintf( stderr, "MOSH_KEY environment variable not found.\n" );
    exit( 1 );
  }

  /* Read prediction preference */
  char *predict_mode = getenv( "MOSH_PREDICTION_DISPLAY" );
  /* can be NULL */

  char *key = strdup( env_key );
  if ( key == NULL ) {
    perror( "strdup" );
    exit( 1 );
  }

  if ( unsetenv( "MOSH_KEY" ) < 0 ) {
    perror( "unsetenv" );
    exit( 1 );
  }

  /* Adopt native locale */
  if ( NULL == setlocale( LC_ALL, "" ) ) {
    perror( "setlocale" );
    exit( 1 );
  }

  try {
    STMClient client( ip, port, key, predict_mode );
    client.init();

    try {
      client.main();
    } catch ( Network::NetworkException e ) {
      fprintf( stderr, "Network exception: %s: %s\r\n",
	       e.function.c_str(), strerror( e.the_errno ) );
    } catch ( Crypto::CryptoException e ) {
      fprintf( stderr, "Crypto exception: %s\r\n",
	       e.text.c_str() );
    }

    client.shutdown();
  } catch ( Network::NetworkException e ) {
    fprintf( stderr, "Network exception: %s: %s\r\n",
	     e.function.c_str(), strerror( e.the_errno ) );
  } catch ( Crypto::CryptoException e ) {
    fprintf( stderr, "Crypto exception: %s\r\n",
	     e.text.c_str() );
  }

  printf( "\n[mosh is exiting.]\n" );

  free( key );

  return 0;
}