/*
 * Command line oriented Moira host tool.
 *
 * kolya@MIT.EDU, January 2000
 *
 * Somewhat based on blanche
 *
 * Copyright (C) 2000 by the Massachusetts Institute of Technology.
 * For copying and distribution information, please see the file
 * <mit-copyright.h>.
 */

#include <mit-copyright.h>
#include <moira.h>
#include <moira_site.h>
#include <mrclient.h>

#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

RCSID("$Header$");

struct owner_type {
  int type;
  char *name;
};

struct mqelem {
  struct mqelem *q_forw;
  struct mqelem *q_back;
  void *q_data;
};

struct string_list {
  char *string;
  struct string_list *next;
};

/* It is important to membercmp that M_USER < M_LIST < M_STRING */
#define M_ANY		0
#define M_USER		1
#define M_LIST		2
#define M_STRING	3
#define M_KERBEROS	4
#define	M_NONE		5

/* argument parsing macro */
#define argis(a, b) (!strcmp(*arg + 1, a) || !strcmp(*arg + 1, b))

/* flags from command line */
int info_flag, update_flag, create_flag, delete_flag, list_map_flag;
int update_map_flag, verbose, noauth;

struct string_list *alias_add_queue, *alias_remove_queue;
struct string_list *map_add_queue, *map_remove_queue;

char *hostname, *whoami;

char *newname, *address, *network, *h_status, *vendor, *model;
char *os, *location, *contact, *adm_cmt, *op_cmt;

struct owner_type *owner;

void usage(char **argv);
int store_host_info(int argc, char **argv, void *hint);
void show_host_info(char **argv);
int show_machine_in_cluster(int argc, char **argv, void *hint);
struct owner_type *parse_member(char *s);
struct string_list *add_to_string_list(struct string_list *old_list, char *s);
int wrap_mr_query(char *handle, int argc, char **argv,
		  int (*callback)(int, char **, void *), void *callarg);
void print_query(char *query_name, int argc, char **argv);

int main(int argc, char **argv)
{
  int status, success;
  char **arg = argv;
  char *server = NULL, *p;

  /* clear all flags & lists */
  info_flag = update_flag = create_flag = list_map_flag = update_map_flag = 0;
  verbose = noauth = 0;
  newname = address = network = h_status = vendor = model = NULL;
  os = location = contact = adm_cmt = op_cmt = NULL;
  owner = NULL;
  alias_add_queue = alias_remove_queue = NULL;
  map_add_queue = map_remove_queue = NULL;
  whoami = argv[0];

  success = 1;

  /* parse args, building addlist, dellist, & synclist */
  while (++arg - argv < argc)
    {
      if (**arg == '-')
	{
	  if (argis("i", "info"))
	    info_flag++;
	  else if (argis("C", "create"))
	    create_flag++;
	  else if (argis("D", "delete"))
	    delete_flag++;
	  else if (argis("R", "rename")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      newname = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("A", "address")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      address = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("O", "owner")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      owner = parse_member(*arg);
	    } else
	      usage(argv);
	  }
	  else if (argis("N", "network")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      network = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("S", "status")) {
	    if (arg - argv < argc - 1) {
	      int i;

	      arg++;
	      update_flag++;
	      h_status = *arg;

	      for(i=0; i<strlen(h_status); i++) {
		if(!isdigit(h_status[i])) {
		  printf("Error: status code %s is not numeric.\n", h_status);
		  exit(1);
		}
	      }
	    } else
	      usage(argv);
	  }
	  else if (argis("V", "vendor")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      vendor = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("M", "model")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      model = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("o", "os")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      os = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("L", "location")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      location = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("c", "contact")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      contact = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("ac", "admcmt")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      adm_cmt = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("oc", "opcmt")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      update_flag++;
	      op_cmt = *arg;
	    } else
	      usage(argv);
	  }
	  else if (argis("a", "aliasadd")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      alias_add_queue=add_to_string_list(alias_add_queue, *arg);
	    } else
	      usage(argv);
	  }
	  else if (argis("d", "aliasdelete")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      alias_remove_queue=add_to_string_list(alias_remove_queue, *arg);
	    } else
	      usage(argv);
	  }
	  else if (argis("am", "addmap")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      map_add_queue=add_to_string_list(map_add_queue, *arg);
	    } else
	      usage(argv);
	    update_map_flag++;
	  }
	  else if (argis("dm", "deletemap")) {
	    if (arg - argv < argc - 1) {
	      arg++;
	      map_remove_queue=add_to_string_list(map_remove_queue, *arg);
	    } else
	      usage(argv);
	    update_map_flag++;
	  }
	  else if (argis("lm", "listmap"))
	    list_map_flag++;
	  else if (argis("n", "noauth"))
	    noauth++;
	  else if (argis("v", "verbose"))
	    verbose++;
	  else if (argis("db", "database"))
	    {
	      if (arg - argv < argc - 1)
		{
		  ++arg;
		  server = *arg;
		}
	      else
		usage(argv);
	    }
	  else
	    usage(argv);
	}
      else if (hostname == NULL)
	hostname = *arg;
      else
	usage(argv);
    }
  if (hostname == NULL)
    usage(argv);

  /* default to info_flag if nothing else was specified */
  if(!(info_flag   || update_flag   || create_flag     || \
       delete_flag || list_map_flag || update_map_flag )) {
    info_flag++;
  }

  /* fire up Moira */
  status = mrcl_connect(server, "stella", 2, !noauth);
  if (status == MRCL_AUTH_ERROR)
    {
      com_err(whoami, 0, "Try the -noauth flag if you don't "
	      "need authentication.");
    }
  if (status)
    exit(2);

  /* create if needed */
  if (create_flag)
    {
      char *argv[30];
      int cnt;

      for (cnt = 0; cnt < 15; cnt++) {
	argv[cnt] = "";
      }

      argv[0] = canonicalize_hostname(strdup(hostname));

      if (vendor)
	argv[1] = vendor;
      if (model)
	argv[2] = model;
      if (os)
	argv[3] = os;
      if (location)
	argv[4] = location;
      if (contact)
	argv[5] = contact;
      /* The use field always gets set to "0" */
      argv[6] = "0";
      if (h_status)
	argv[7] = h_status;
      else
	argv[7] = "1";
      if (network)
	argv[8] = network;
      if (address)
	argv[9] = address;
      if (adm_cmt)
	argv[12] = adm_cmt;
      if (op_cmt)
	argv[13] = op_cmt;

      if (owner)
	{
	  argv[11] = owner->name;
	  switch (owner->type)
	    {
	    case M_ANY:
	    case M_USER:
	      argv[10] = "USER";
	      status = wrap_mr_query("add_host", 14, argv, NULL, NULL);
	      if (owner->type != M_ANY || status != MR_USER)
		break;

	    case M_LIST:
	      argv[10] = "LIST";
	      status = wrap_mr_query("add_host", 14, argv, NULL, NULL);
	      break;

	    case M_KERBEROS:
	      argv[10] = "KERBEROS";
	      status = wrap_mr_query("add_host", 14, argv, NULL, NULL);
	      break;

	    case M_NONE:
	      argv[10] = "NONE";
	      status = wrap_mr_query("add_host", 14, argv, NULL, NULL);
	      break;
	    }
	}
      else
	{
	  argv[10] = "NONE";
	  argv[11] = "NONE";

	  status = wrap_mr_query("add_host", 14, argv, NULL, NULL);
	}

      if (status)
	{
	  com_err(whoami, status, "while creating host.");
	  exit(1);
	}

    }
  else if (update_flag)
    {
      char *old_argv[30];
      char *argv[16];
      char *args[5];
      int cnt;

      args[0] = canonicalize_hostname(strdup(hostname));
      args[1] = args[2] = args[3] = "*";

      status = wrap_mr_query("get_host", 4, args, store_host_info, old_argv);
      if (status)
	{
	  com_err(whoami, status, "while getting list information");
	  exit(1);
	}

      argv[1] = old_argv[0];
      argv[2] = old_argv[1];
      argv[3] = old_argv[2];
      argv[4] = old_argv[3];
      argv[5] = old_argv[4];
      argv[6] = old_argv[5];
      argv[7] = old_argv[6];
      argv[8] = old_argv[7];
      argv[9] = old_argv[9];
      argv[10] = old_argv[10];
      argv[11] = old_argv[11];
      argv[12] = old_argv[12];
      argv[13] = old_argv[13];
      argv[14] = old_argv[14];

      argv[0] = canonicalize_hostname(strdup(hostname));
      if (newname)
	argv[1] = newname;
      if (vendor)
	argv[2] = vendor;
      if (model)
	argv[3] = model;
      if (os)
	argv[4] = os;
      if (location)
	argv[5] = location;
      if (contact)
	argv[6] = contact;
      if (h_status)
	argv[8] = h_status;
      if (network)
	argv[9] = network;
      if (address)
	argv[10] = address;
      if (adm_cmt)
	argv[13] = adm_cmt;
      if (op_cmt)
	argv[14] = op_cmt;

      if (owner)
	{
	  argv[12] = owner->name;
	  switch (owner->type)
	    {
	    case M_ANY:
	    case M_USER:
	      argv[11] = "USER";
	      status = wrap_mr_query("update_host", 15, argv, NULL, NULL);
	      if (owner->type != M_ANY || status != MR_USER)
		break;

	    case M_LIST:
	      argv[11] = "LIST";
	      status = wrap_mr_query("update_host", 15, argv, NULL, NULL);
	      break;

	    case M_KERBEROS:
	      argv[11] = "KERBEROS";
	      status = wrap_mr_query("update_host", 15, argv, NULL, NULL);
	      break;

	    case M_NONE:
	      argv[11] = "NONE";
	      status = wrap_mr_query("update_host", 15, argv, NULL, NULL);
	      break;
	    }
	}
      else
	status = wrap_mr_query("update_host", 15, argv, NULL, NULL);

      if (status)
	com_err(whoami, status, "while updating host.");
      else if (newname)
	hostname = newname;
    }

  /* create aliases if necessary */
  if (alias_add_queue) {
    struct string_list *q = alias_add_queue;

    while(q) {
      char *alias = q->string;
      char *args[2];

      args[0] = canonicalize_hostname(strdup(alias));
      args[1] = canonicalize_hostname(strdup(hostname));
      status = wrap_mr_query("add_hostalias", 2, args, NULL, NULL);
      if (status) {
	com_err(whoami, status, "while adding host alias");
	exit(1);
      }

      q = q->next;
    }
  }

  /* delete aliases if necessary */
  if (alias_remove_queue) {
    struct string_list *q = alias_remove_queue;

    while(q) {
      char *alias = q->string;
      char *args[2];

      args[0] = canonicalize_hostname(strdup(alias));
      args[1] = canonicalize_hostname(strdup(hostname));
      status = wrap_mr_query("delete_hostalias", 2, args, NULL, NULL);
      if (status) {
	com_err(whoami, status, "while deleting host alias");
	exit(1);
      }

      q = q->next;
    }
  }

  /* create cluster mappings */
  if (map_add_queue) {
    struct string_list *q = map_add_queue;

    while(q) {
      char *clustername = q->string;
      char *args[2];

      args[0] = canonicalize_hostname(strdup(hostname));
      args[1] = clustername;
      status = wrap_mr_query("add_machine_to_cluster", 2, args, NULL, NULL);
      if (status) {
	com_err(whoami, status, "while adding cluster mapping");
	exit(1);
      }

      q = q->next;
    }
  }

  /* delete cluster mappings */
  if (map_remove_queue) {
    struct string_list *q = map_remove_queue;

    while(q) {
      char *clustername = q->string;
      char *args[2];

      args[0] = canonicalize_hostname(strdup(hostname));
      args[1] = clustername;
      status = wrap_mr_query("delete_machine_from_cluster", 2, args,
			     NULL, NULL);
      if (status) {
	com_err(whoami, status, "while deleting cluster mapping");
	exit(1);
      }

      q = q->next;
    }
  }

  /* display list info if requested to */
  if (info_flag) {
    struct mqelem *elem = NULL;
    char *args[5];
    char *argv[30];

    args[0] = canonicalize_hostname(strdup(hostname));
    args[1] = args[2] = args[3] = "*";
    status = wrap_mr_query("get_host", 4, args, store_host_info, argv);
    if (status) {
      com_err(whoami, status, "while getting host information");
      exit(1);
    }
    show_host_info(argv);
  }

  /* list cluster mappings if needed */
  if (list_map_flag) {
    char *args[3];

    args[0] = canonicalize_hostname(strdup(hostname));
    args[1] = "*";
    status = wrap_mr_query("get_machine_to_cluster_map", 2, args,
		      show_machine_in_cluster, NULL);
    if (status)
      if (status != MR_NO_MATCH) {
        com_err(whoami, status, "while getting cluster mappings");
        exit(1);
      }
  }

  if (delete_flag) {
    char *argv[1];

    argv[0] = canonicalize_hostname(strdup(hostname));
    status = wrap_mr_query("delete_host", 1, argv, NULL, NULL);
    if (status) {
      com_err(whoami, status, "while deleting host");
      exit(1);
    }
  }

  /* We're done! */
  mr_disconnect();
  exit(success ? 0 : 1);
}

void usage(char **argv)
{
  fprintf(stderr, "Usage: %s hostname [options]\n", argv[0]);
  fprintf(stderr, "Options are\n");
  fprintf(stderr, "  %-39s%-39s\n", "-C   | -create",
	  "-O   | -owner owner");
  fprintf(stderr, "  %-39s%-39s\n", "-D   | -delete",
	  "-S   | -status status");
  fprintf(stderr, "  %-39s%-39s\n", "-R   | -rename newname",
	  "-V   | -vendor vendor");
  fprintf(stderr, "  %-39s%-39s\n", "-a   | -addalias alias",
	  "-M   | -model model");
  fprintf(stderr, "  %-39s%-39s\n", "-d   | -deletealias alias",
	  "-L   | -location location");
  fprintf(stderr, "  %-39s%-39s\n", "-i   | -info",
	  "-o   | -os os");
  fprintf(stderr, "  %-39s%-39s\n", "-oc  | -opcmt op_cmt",
	  "-c   | -contact contact");
  fprintf(stderr, "  %-39s%-39s\n", "-ac  | -admcmt adm_cmt",
	  "-A   | -address address");
  fprintf(stderr, "  %-39s%-39s\n", "-am  | -addmap cluster",
	  "-N   | -network network");
  fprintf(stderr, "  %-39s%-39s\n", "-dm  | -deletemap cluster",
	  "-lm  | -listmap");
  fprintf(stderr, "  %-39s%-39s\n", "-db  | -database host[:port]",
	  "-n   | -noauth");
  fprintf(stderr, "  %-39s%-39s\n", "-v   | -verbose",
	  "");
  exit(1);
}

/* Show alias information */

static int show_has_aliases;

int show_alias_info(int argc, char **argv, void *hint)
{
  if(!show_has_aliases++)
    printf("Aliases:  %s", argv[0]);
  else
    printf(", %s", argv[0]);

  return MR_CONT;
}

static char *states[] = {
  "Reserved (0)",
  "Active (1)",
  "None (2)",
  "Deleted (3)"
};

static char *MacState(int state)
{
  static char buf[BUFSIZ];

  if (state < 0 || state > 3)
    {
      sprintf(buf, "Unknown (%d)", state);
      return buf;
    }
  return states[state];
}

/* Retrieve information about a host */

int store_host_info(int argc, char **argv, void *hint)
{
  int i;
  char **nargv = hint;

  for(i=0; i<argc; i++)
    nargv[i] = strdup(argv[i]);

  return MR_CONT;
}

void show_host_info(char **argv)
{
  char tbuf[256];
  char *args[3];
  struct mqelem *elem = NULL;
  int stat;

  printf("Machine:  %s\n", argv[M_NAME]);
  args[0] = "*";
  args[1] = argv[M_NAME];
  show_has_aliases = 0;
  stat = wrap_mr_query("get_hostalias", 2, args, show_alias_info, &elem);
  printf("\n");
  if (stat) {
    if (stat != MR_NO_MATCH)
      com_err(whoami, stat, "while getting aliases");
  } else {
    printf("\n");
  }
  sprintf(tbuf, "%s %s", argv[M_OWNER_TYPE],
          strcmp(argv[M_OWNER_TYPE], "NONE") ? argv[M_OWNER_NAME] : "");
  printf("Address:  %-16s    Network:    %-16s\n",
          argv[M_ADDR], argv[M_SUBNET]);
  printf("Owner:    %-16s    Use data:   %s\n", tbuf, argv[M_INUSE]);
  printf("Status:   %-16s    Changed:    %s\n",
          MacState(atoi(argv[M_STAT])), argv[M_STAT_CHNG]);
  printf("\n");

  printf("Vendor:   %-16s    Model:      %-20s  OS:  %s\n",
          argv[M_VENDOR], argv[M_MODEL], argv[M_OS]);
  printf("Location: %-16s    Contact:    %-20s  Opt: %s\n",
          argv[M_LOC], argv[M_CONTACT], argv[M_USE]);
  printf("\nAdm cmt: %s\n", argv[M_ACOMMENT]);
  printf("Op cmt:  %s\n", argv[M_OCOMMENT]);
  printf("\n");
  printf("Created  by %s on %s\n", argv[M_CREATOR], argv[M_CREATED]);
  printf("Last mod by %s at %s with %s.\n", argv[M_MODBY], argv[M_MODTIME], argv[M_MODWITH]);
}

int show_machine_in_cluster(int argc, char **argv, void *hint)
{
  printf("Machine: %-30s Cluster: %-30s\n", argv[0], argv[1]);

  return MR_CONT;
}

/* Parse a line of input, fetching a member.  NULL is returned if a member
 * is not found.  ';' is a comment character.
 */

struct owner_type *parse_member(char *s)
{
  struct owner_type *m;
  char *p, *lastchar;

  while (*s && isspace(*s))
    s++;
  lastchar = p = s;
  while (*p && *p != '\n' && *p != ';')
    {
      if (isprint(*p) && !isspace(*p))
	lastchar = p++;
      else
	p++;
    }
  lastchar++;
  *lastchar = '\0';
  if (p == s || strlen(s) == 0)
    return NULL;

  if (!(m = malloc(sizeof(struct owner_type))))
    return NULL;

  if ((p = strchr(s, ':')))
    {
      *p = '\0';
      m->name = ++p;
      if (!strcasecmp("user", s))
	m->type = M_USER;
      else if (!strcasecmp("list", s))
	m->type = M_LIST;
      else if (!strcasecmp("string", s))
	m->type = M_STRING;
      else if (!strcasecmp("kerberos", s))
	m->type = M_KERBEROS;
      else if (!strcasecmp("none", s))
	m->type = M_NONE;
      else
	{
	  m->type = M_ANY;
	  *(--p) = ':';
	  m->name = s;
	}
      m->name = strdup(m->name);
    }
  else
    {
      m->name = strdup(s);
      m->type = strcasecmp(s, "none") ? M_ANY : M_NONE;
    }
  return m;
}

struct string_list *add_to_string_list(struct string_list *old_list, char *s) {
  struct string_list *new_list;

  new_list = (struct string_list *)malloc(sizeof(struct string_list *));
  new_list->next = old_list;
  new_list->string = s;

  return new_list;
}

int wrap_mr_query(char *handle, int argc, char **argv,
                  int (*callback)(int, char **, void *), void *callarg) {
  if (verbose)
    print_query(handle, argc, argv);

  return mr_query(handle, argc, argv, callback, callarg);
}

void print_query(char *query_name, int argc, char **argv) {
  int cnt;

  printf("qy %s", query_name);
  for(cnt=0; cnt<argc; cnt++)
    printf(" <%s>", argv[cnt]);
  printf("\n");
}