#include <curl/curl.h>

#include <curl/types.h>

#include <curl/easy.h>

#include <stdio.h>

#include <string.h>

#include <unistd.h>

#include <stdlib.h>

#include <sys/stat.h>

#include <fcntl.h>

/**

 utility function for XPath-ish stuff:

 */

xmlNodePtr xml_quickxpath(xmlXPathContextPtr xpathctxt, xmlChar *path)

{

  xmlNodePtr toreturn;

  xmlXPathObjectPtr xmlxpathobjptr;

  xmlxpathobjptr = xmlXPathEval(path, xpathctxt);

  if(!xmlxpathobjptr

     || !xmlxpathobjptr->nodesetval->nodeNr)

    {

      fprintf(stderr, "XPath resolution failed for ``%s'' in ``%s'' (``%s'')\n", path, xpathctxt->doc->name, xpathctxt->doc->URL);

      return (xmlNodePtr)NULL;

    }

  toreturn = *(xmlxpathobjptr->nodesetval->nodeTab);

  xmlXPathFreeObject(xmlxpathobjptr);

  return toreturn;

}

/** Ensures that rendering engines on the computer are up-to-date */

int software_updatecheck(char *datadir){

  char *pathtoserverVersion;

  _distren_asprintf(&pathtoserverVersion, "%s/serverEngineVersion.info",datadir);

  char *engineDownloadPath;

  _distren_asprintf(&engineDownloadPath, "%s/engines/blender.tgz",datadir);

  char *pathtolocalVersion;

  _distren_asprintf(&pathtolocalVersion, "%s/envines/blender/version.info",datadir);

  struct stat buffer;

  char serverVersion[5]; // Version numbers are nice and short

  char localVersion[5]; // Version numbers are nice and short

  // Read server version

  {

    FILE * serverVersionFile;

    serverVersionFile = fopen(pathtoserverVersion, "r");

    fscanf(serverVersionFile, "%s",serverVersion);

    fclose(serverVersionFile);

  }

  // Read local version

  {

    FILE * localVersionFile;

    localVersionFile = fopen(pathtolocalVersion, "r");

    fscanf(localVersionFile, "%s",localVersion);

    fclose(localVersionFile);

  }

  // If a rendering engine was never downloaded

  if( stat(SYSCONFDIR "/engines/blender", &buffer) == -1){

    fprintf(stderr,"You don't have the blender engine. Preparing to download...");

    curlget("http://protofusion.org/distren/srv/blender-lin32-dist.tgz", engineDownloadPath); // Add calls for operating system info

    // untar(SYSCONFDIR "/engines/blender.tgz");

  }

  // If a rendering engine is out-of-date

  else if( serverVersion != localVersion){

    fprintf(stderr,"You don't have the latest blender engine. Preparing to download...");

    curlget("http://protofusion.org/distren/srv/blender-lin32-dist.tgz", engineDownloadPath); // Add calls for operating system info

    // untar(SYSCONFDIR "/engines/blender.tgz");

  }

  return 0;

}

/** Stub for deleting job data from the disk. @TODO: unstubify me! */

int delete_jobdata(int jobnum, char *datadir)

{

  char *jobpath;

  _distren_asprintf(&jobpath, "%s/%d", datadir, jobnum);

  rmdir(jobpath);

  fprintf(stderr, "I just failed to remove all of your job data because I can only delete empty directories! Haha!\nPlease contact the dev team :D\n\tWe'd be overjoyed to know that someone was willing to try to use this in this devel/design/planning stage ;-)\n");

  return 0;

}

/** Stub stub stubbiness ugh @TODO: Kill me. */

void tell_the_server(int stuff){

}

/** Function referenced by curlget() to write data to disk. */

size_t curl_writetodisk(void *ptr, size_t size, size_t nmemb, FILE *stream)

 {

    return fwrite(ptr, size, nmemb, stream);

  }

/** Helper function for cURL's progress display */

int curl_progress( char *Bar,double t,double d,double ultotal,double ulnow)

{

return 0;

}

/** Retrieves a URL with cURL and saves it to disk */

int curlget(char *url, char *out){

  double *Bar; // Stores cURL progress display info

  CURL *curl;

  CURLcode res;

  FILE *outfile;

  curl = curl_easy_init();

  if(curl) {

	outfile = fopen(out, "w"); // Open where we're writing to

  curl_easy_setopt(curl, CURLOPT_URL, url);

  curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile);

  curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, curl_writetodisk); // this MUST be set for win32 compat.

  curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0);

  curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, curl_progress);

  curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &Bar);

  res = curl_easy_perform(curl);

  curl_easy_cleanup(curl);

  }

  fprintf(stderr,"\n"); // Clears out he progressbar's carriage return

  return res; // 0 means OK, nonzero means AAAH badness

}

/** Posts a file to a url with cUrl */

int curlpost(char *filename, char *url){

  char *targetname = "uploadedfile"; // Name of the target in the php file on the server (Don't change me unless you have different PHP code)

  CURL *curl;

  CURLcode res;

  struct curl_httppost *formpost=NULL;

  struct curl_httppost *lastptr=NULL;

  struct curl_slist *headerlist=NULL;

  static const char buf[] = "Expect:";

  curl_global_init(CURL_GLOBAL_ALL);

  /* upload field... */

  curl_formadd(&formpost,

               &lastptr,

               CURLFORM_COPYNAME, targetname,

               CURLFORM_FILE, filename,

               CURLFORM_END);

  /* filename field... */

  curl_formadd(&formpost,

               &lastptr,

               CURLFORM_COPYNAME, "filename",

               CURLFORM_COPYCONTENTS, filename,

               CURLFORM_END);

  /* submit field, not usually needed, just in case... */

  curl_formadd(&formpost,

/** Generates a SSH key with ssh-keygen */

int ssh_keygen(){

  /* Checks to see if the keys are already present. */

  int status;

  struct stat buffer;

  status = stat(SYSCONFDIR "/distren.id_rsa", &buffer);

  if(status != -1){

    fprintf(stderr, "***Please delete etc/distren.id_rsa and etc/distren.id_rsa.pub to register.\n");

    return 0;

  }

  /* start execio code */

  char *command = "ssh-keygen"; // @TODO: append .exe if win32?

  int ret;

  char *cmd[] = { command, "-q", "-f", SYSCONFDIR "/distren.id_rsa", "-N", "", (char *)NULL }; // TODO: Give me the correct args!

  char buf[10];

  struct execio *testrem;

  size_t readlen;

  ret = execio_open(&testrem, command, cmd); // @TODO: This path will be absolute for testing, should be relative to install on production

  buf[9] = '\0';

  while(!execio_read(testrem, buf, 9, &readlen))

    {

      if(readlen > 9) {

        fprintf(stderr, "Something is terribly wrong!\n");

      }

      buf[readlen] = '\0';

      fprintf(stderr, "read \"%s\"\n", buf);

    }

  execio_close(testrem);

  /* end execio code */

  // Supposedly execio returns 1 if it has bad args.

  if(ret == 1){

    fprintf(stderr, "Generating your key failed. Ensure that ssh-keygen is present!\n"); // Use different executor that searches the path? there is one...

    return 0;

  }

  else{

    fprintf(stderr,"We successfully generated your key! Yay!\n");

    return 1;

  }

return 0;

}

/** Registers the user on the DistRen server */

int register_user(char *username, char *email)

{

/* Note: this code moved here from after the useradd code, so useradd doesn't happen if there is an existing key, etc */

  curlget("http://protofusion.org/distren/keys/setup_rsa", SYSCONFDIR "/setup_rsa"); // Grabs key to use for setup login

  /* puts the person's username in the conf */

  if(conf_replace(username) == 0){

    fprintf(stderr, "Failed!\n");

    return 0;

  }

  /* generates keys for login, @TODO: pub key must somehow be sent to the server. */

  if(ssh_keygen() == 0){

    fprintf(stderr, "Failed!\n");

    return 0;

  }

  /*

   * All created user accounts should be sandboxed accordingly, requiring a different skel, and the default shell to be rbash. Also,

   * a custom path defined in the .bashrc of the skel is needed.

   */

  int ret;

  char buf[10];

  struct execio *testrem;

  char *execargv[] =

    {

      "ssh",

      "distren_setup@protofusion.org",

      "-i",

      SYSCONFDIR "/setup_rsa",

      "-p",

      "23",

      "newuser",

      "-M",

      "-c",

      email,

      "-d",

      "/home/distren",

      "--gid",

      "541",

      username,

      (char *)NULL

    };

  size_t readlen;

  ret = execio_open(&testrem, "ssh", execargv); // TODO: Grab returns from this someday.

  buf[9] = '\0';

  while(!execio_read(testrem, buf, 9, &readlen))

    {

      if(readlen > 9) {

        fprintf(stderr, "!!!! Something is terribly wrong!\n");

      }