#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "buffer.h"
#include "constmap.h"
#include "direntry.h"
#include "exit.h"
#include "fmt.h"
#include "str.h"
#include "stralloc.h"

#include "auto_break.h"
#include "auto_patrn.h"
#include "auto_qmail.h"
#include "auto_spawn.h"
#include "auto_split.h"
#include "auto_uids.h"
#include "control.h"
#include "spf.h"

stralloc me = {0};
int meok;

stralloc line = {0};
char num[FMT_ULONG];

void safeput(char *buf, unsigned int len)
{
  char ch;

  while (len > 0) {
    ch = *buf;
    if ((ch < 32) || (ch > 126)) ch = '?';
    buffer_put(buffer_1, &ch, 1);
    ++buf;
    --len;
  }
}

void do_int(char *fn, char *def, char *pre, char *post)
{
  long i;
  buffer_puts(buffer_1, "\n");
  buffer_puts(buffer_1, fn);
  buffer_puts(buffer_1, ": ");
  switch (control_readint(&i, fn)) {
    case 0:
      buffer_puts(buffer_1, "(Default.) ");
      buffer_puts(buffer_1, pre);
      buffer_puts(buffer_1, def);
      buffer_puts(buffer_1, post);
      buffer_puts(buffer_1, ".\n");
      break;
    case 1:
      if (i < 0) i = 0;
      buffer_puts(buffer_1, pre);
      buffer_put(buffer_1, num, fmt_uint(num, i));
      buffer_puts(buffer_1, post);
      buffer_puts(buffer_1, ".\n");
      break;
    default: buffer_puts(buffer_1, "Oops! Trouble reading this file.\n"); break;
  }
}

void do_str(char *fn, int flagme, char *def, char *pre)
{
  buffer_puts(buffer_1, "\n");
  buffer_puts(buffer_1, fn);
  buffer_puts(buffer_1, ": ");
  switch (control_readline(&line, fn)) {
    case 0:
      buffer_puts(buffer_1, "(Default.) ");
      if (!stralloc_copys(&line, def)) {
        buffer_puts(buffer_1, "Oops! Out of memory.\n");
        break;
      }
      if (flagme && meok) {
        if (!stralloc_copy(&line, &me)) {
          buffer_puts(buffer_1, "Oops! Out of memory.\n");
          break;
        }
      }
    case 1:
      buffer_puts(buffer_1, pre);
      safeput(line.s, line.len);
      buffer_puts(buffer_1, ".\n");
      break;
    default: buffer_puts(buffer_1, "Oops! Trouble reading this file.\n"); break;
  }
}

int do_lst(char *fn, char *def, char *pre, char *post)
{
  int i;
  int j;

  buffer_puts(buffer_1, "\n");
  buffer_puts(buffer_1, fn);
  buffer_puts(buffer_1, ": ");
  switch (control_readfile(&line, fn, 0)) {
    case 0:
      buffer_puts(buffer_1, "(Default.) ");
      buffer_puts(buffer_1, def);
      buffer_puts(buffer_1, "\n");
      return 0;
    case 1:
      buffer_puts(buffer_1, "\n");
      i = 0;
      for (j = 0; j < line.len; ++j) {
        if (!line.s[j]) {
          buffer_puts(buffer_1, pre);
          safeput(line.s + i, j - i);
          buffer_puts(buffer_1, post);
          buffer_puts(buffer_1, "\n");
          i = j + 1;
        }
      }
      return 1;
    default: buffer_puts(buffer_1, "Oops! Trouble reading this file.\n"); return -1;
  }
}

int main()
{
  DIR *dir;
  direntry *d;
  struct stat stmrh;
  struct stat stmrhcdb;

  buffer_puts(buffer_1, "s/qmail home directory: ");
  buffer_puts(buffer_1, auto_qmail);
  buffer_puts(buffer_1, ".\n");

  buffer_puts(buffer_1, "user-ext delimiter: ");
  buffer_puts(buffer_1, auto_break);
  buffer_puts(buffer_1, ".\n");

  buffer_puts(buffer_1, "paternalism (in decimal): ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_patrn));
  buffer_puts(buffer_1, ".\n");

  buffer_puts(buffer_1, "silent concurrency limit: ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_spawn));
  buffer_puts(buffer_1, ".\n");

  buffer_puts(buffer_1, "subdirectory split: ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_split));
  buffer_puts(buffer_1, ".\n");

  buffer_puts(buffer_1, "user ids: ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uida));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uidd));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uidl));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uido));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uidp));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uidq));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uidr));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_uids));
  buffer_puts(buffer_1, ".\n");

  buffer_puts(buffer_1, "group ids: ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_gidn));
  buffer_puts(buffer_1, ", ");
  buffer_put(buffer_1, num, fmt_ulong(num, (unsigned long)auto_gidq));
  buffer_puts(buffer_1, ".\n");

  if (chdir(auto_qmail) == -1) {
    buffer_puts(buffer_1, "Oops! Unable to chdir to ");
    buffer_puts(buffer_1, auto_qmail);
    buffer_puts(buffer_1, ".\n");
    buffer_flush(buffer_1);
    _exit(110);
  }
  if (chdir("control") == -1) {
    buffer_puts(buffer_1, "Oops! Unable to chdir to control.\n");
    buffer_flush(buffer_1);
    _exit(110);
  }

  dir = opendir(".");
  if (!dir) {
    buffer_puts(buffer_1, "Oops! Unable to open current directory.\n");
    buffer_flush(buffer_1);
    _exit(110);
  }

  meok = control_readline(&me, "me");
  if (meok == -1) {
    buffer_puts(buffer_1, "Oops! Trouble reading control/me.");
    buffer_flush(buffer_1);
    _exit(112);
  }

  do_lst("authsenders", "No authenticated SMTP senders.", "Authenticated SMTP senders: ", "");
  do_lst(
      "badhelo",
      "Any HELO/EHLO greeting is allowed.",
      "",
      " not accepted in HELO/EHLO; exception token is '!'.");
  do_lst(
      "badmailfrom",
      "Any MAIL FROM is allowed.",
      "",
      " are rejected or treated special in MAIL FROM depending on tokens: '!', '?', '=', '~', '+'.");
  do_lst("badloadertypes", "Any loader types are accepted.", "", " not accepted as loader type.");
  /* XXX: check badloadertypes.cdb contents */
  buffer_puts(buffer_1, "\nbadloadertypes.cdb: ");
  if (stat("badloadertypes", &stmrh) == -1)
    if (stat("badloadertypes.cdb", &stmrhcdb) == -1)
      buffer_puts(buffer_1, "(Default.) No effect.\n");
    else
      buffer_puts(buffer_1, "Oops! badloadertypes.cdb exists but badloadertypes doesn't.\n");
  else if (stat("badloadertypes.cdb", &stmrhcdb) == -1)
    buffer_puts(buffer_1, "Oops! badloadertypes exists but badloadertypes.cdb doesn't.\n");
  else if (stmrh.st_mtime > stmrhcdb.st_mtime)
    buffer_puts(buffer_1, "Oops! badloadertypes.cdb is older than badloadertypes.\n");
  else
    buffer_puts(buffer_1, "Modified recently enough; hopefully up to date.\n");
  do_lst("badmimetypes", "Any MIME types are accepted.", "", " not accepted as MIME type.");
  /* XXX: check badmimetypes.cdb contents */
  buffer_puts(buffer_1, "\nbadmimetypes.cdb: ");
  if (stat("badmimetypes", &stmrh) == -1)
    if (stat("badmimetypes.cdb", &stmrhcdb) == -1)
      buffer_puts(buffer_1, "(Default.) No effect.\n");
    else
      buffer_puts(buffer_1, "Oops! badmimetypes.cdb exists but badmimetypes doesn't.\n");
  else if (stat("badmimetypes.cdb", &stmrhcdb) == -1)
    buffer_puts(buffer_1, "Oops! badmimetypes exists but badmimetypes.cdb doesn't.\n");
  else if (stmrh.st_mtime > stmrhcdb.st_mtime)
    buffer_puts(buffer_1, "Oops! badmimetypes.cdb is older than badmimetypes.\n");
  else
    buffer_puts(buffer_1, "Modified recently enough; hopefully up to date.\n");
  do_lst("badrcptto", "Any RCPT TO is allowed.", "", " not accepted in RCPT TO.");
  do_str("bouncefrom", 0, "MAILER-DAEMON", "Bounce user name is ");
  do_str("bouncehost", 1, "bouncehost", "Bounce host name is ");
  do_int("bouncemaxbytes", "0", "Bounce size limit is ", " bytes");
  do_int("concurrencylocal", "10", "Local concurrency is ", "");
  do_int("concurrencyremote", "20", "Remote concurrency is ", "");
  do_int("databytes", "0", "SMTP DATA limit is ", " bytes");
  do_str("defaultdomain", 1, "defaultdomain", "Default domain name is ");
  do_str("defaulthost", 1, "defaulthost", "Default host name is ");
  do_lst("dkimdomains", "No DKIM domains defined for signing.", "DKIM domains: ", "");
  do_lst("domaincerts", "No domain certs defined.", "Domain certs: ", "");
  do_lst("domainips", "No domain ip mappings defined.", "Mappping sender domain part to local ip: ", "");
  do_str("doublebouncehost", 1, "doublebouncehost", "2B recipient host: ");
  do_str("doublebounceto", 0, "postmaster", "2B recipient user: ");
  do_str("envnoathost", 1, "envnoathost", "Presumed domain name is ");
  do_str("helohost", 1, "helohost", "SMTP client HELO host name is ");
  do_str("idhost", 1, "idhost", "Message-ID host name is ");
  do_str("localiphost", 1, "localiphost", "Local IP address becomes ");
  do_lst("locals", "Messages for me are delivered locally.", "Messages for ", " are delivered locally.");
  do_str("me", 0, "undefined! Uh-oh", "My name is ");

  do_lst("mailfromrules", "Any envelope sender are accepted.", "", " (MAV rule).");
  /* XXX: check mailfromrules.cdb contents */
  buffer_puts(buffer_1, "\nmailfromrules.cdb: ");
  if (stat("mailfromrules", &stmrh) == -1)
    if (stat("mailfromrules.cdb", &stmrhcdb) == -1)
      buffer_puts(buffer_1, "(Default.) No effect.\n");
    else
      buffer_puts(buffer_1, "Oops! mailfromrules.cdb exists but mailfromrules doesn't.\n");
  else if (stat("mailfromrules.cdb", &stmrhcdb) == -1)
    buffer_puts(buffer_1, "Oops! mailfromrules exists but mailfromrules.cdb doesn't.\n");
  else if (stmrh.st_mtime > stmrhcdb.st_mtime)
    buffer_puts(buffer_1, "Oops! mailfromrules.cdb is older than mailfromrules.\n");
  else
    buffer_puts(buffer_1, "Modified recently enough; hopefully up to date.\n");

  do_lst(
      "percenthack",
      "The percent hack is not allowed.",
      "The percent hack is allowed for user%host@",
      ".");
  do_str("plusdomain", 1, "plusdomain", "Plus domain name is ");
  do_lst("qmqpservers", "No QMQP servers.", "QMQP server: ", ".");
  do_int("queuelifetime", "604800", "Message lifetime in the queue is ", " seconds");

  if (do_lst(
          "rcpthosts",
          "SMTP clients may send messages to any recipient.",
          "SMTP clients may send messages to recipients at ",
          "."))
    do_lst("morercpthosts", "No effect.", "SMTP clients may send messages to recipients at ", ".");
  else
    do_lst(
        "morercpthosts",
        "No rcpthosts; morercpthosts is irrelevant.",
        "No rcpthosts; doesn't matter that morercpthosts has ",
        ".");
  /* XXX: check morercpthosts.cdb contents */
  buffer_puts(buffer_1, "\nmorercpthosts.cdb: ");
  if (stat("morercpthosts", &stmrh) == -1)
    if (stat("morercpthosts.cdb", &stmrhcdb) == -1)
      buffer_puts(buffer_1, "(Default.) No effect.\n");
    else
      buffer_puts(buffer_1, "Oops! morercpthosts.cdb exists but morercpthosts doesn't.\n");
  else if (stat("morercpthosts.cdb", &stmrhcdb) == -1)
    buffer_puts(buffer_1, "Oops! morercpthosts exists but morercpthosts.cdb doesn't.\n");
  else if (stmrh.st_mtime > stmrhcdb.st_mtime)
    buffer_puts(buffer_1, "Oops! morercpthosts.cdb is older than morercpthosts.\n");
  else
    buffer_puts(buffer_1, "Modified recently enough; hopefully up to date.\n");
  do_lst(
      "recipients",
      "SMTP clients may send messages to any recipient.",
      "SMTP clients may send messages to local recipients listed in ",
      ".");
  do_str("smtpgreeting", 1, "smtpgreeting", "SMTP greeting: 220 ");
  do_lst("qmtproutes", "No additional QMTP routes.", "QMTP route: ", "");
  do_lst("smtproutes", "No artificial SMTP routes.", "SMTP route: ", "");
  do_str("spfexplain", 0, SPF_DEFEXP, "SPF default explanation is: 550 ");
  do_str("spflocalrules", 0, "(None)", "Defined local SPF rules are: ");
  do_lst("srsrdomains", "No SRS fowarding rules.", "SRS rules: ", "");
  do_int("timeoutconnect", "60", "SMTP client connection timeout is ", " seconds");
  do_int("timeoutremote", "1200", "SMTP client data timeout is ", " seconds");
  do_int("timeoutsmtpd", "1200", "SMTP server data timeout is ", " seconds");
  do_lst("tlsdestinations", "No TLS destinations defined.", "TLS destination: ", "");
  do_lst("virtualdomains", "No virtual domains.", "Virtual domain: ", "");

  while ((d = readdir(dir))) {
    if (str_equal(d->d_name, ".")) continue;
    if (str_equal(d->d_name, "..")) continue;
    if (str_equal(d->d_name, "authsenders")) continue;
    if (str_equal(d->d_name, "badhelo")) continue;
    if (str_equal(d->d_name, "badrcptto")) continue;
    if (str_equal(d->d_name, "badmailfrom")) continue;
    if (str_equal(d->d_name, "badloadertypes")) continue;
    if (str_equal(d->d_name, "badloadertypes.cdb")) continue;
    if (str_equal(d->d_name, "badmimetypes")) continue;
    if (str_equal(d->d_name, "badmimetypes.cdb")) continue;
    if (str_equal(d->d_name, "bouncefrom")) continue;
    if (str_equal(d->d_name, "bouncehost")) continue;
    if (str_equal(d->d_name, "bouncemaxbytes")) continue;
    if (str_equal(d->d_name, "concurrencylocal")) continue;
    if (str_equal(d->d_name, "concurrencyremote")) continue;
    if (str_equal(d->d_name, "databytes")) continue;
    if (str_equal(d->d_name, "defaultdomain")) continue;
    if (str_equal(d->d_name, "defaulthost")) continue;
    if (str_equal(d->d_name, "dkimdomains")) continue;
    if (str_equal(d->d_name, "domainips")) continue;
    if (str_equal(d->d_name, "domaincerts")) continue;
    if (str_equal(d->d_name, "doublebouncehost")) continue;
    if (str_equal(d->d_name, "doublebounceto")) continue;
    if (str_equal(d->d_name, "envnoathost")) continue;
    if (str_equal(d->d_name, "helohost")) continue;
    if (str_equal(d->d_name, "idhost")) continue;
    if (str_equal(d->d_name, "localiphost")) continue;
    if (str_equal(d->d_name, "locals")) continue;
    if (str_equal(d->d_name, "me")) continue;
    if (str_equal(d->d_name, "mailfromrules")) continue;
    if (str_equal(d->d_name, "mailfromrules.cdb")) continue;
    if (str_equal(d->d_name, "morercpthosts")) continue;
    if (str_equal(d->d_name, "morercpthosts.cdb")) continue;
    if (str_equal(d->d_name, "percenthack")) continue;
    if (str_equal(d->d_name, "plusdomain")) continue;
    if (str_equal(d->d_name, "qmqpservers")) continue;
    if (str_equal(d->d_name, "queuelifetime")) continue;
    if (str_equal(d->d_name, "rcpthosts")) continue;
    if (str_equal(d->d_name, "recipients")) continue;
    if (str_equal(d->d_name, "smtpgreeting")) continue;
    if (str_equal(d->d_name, "qmtproutes")) continue;
    if (str_equal(d->d_name, "smtproutes")) continue;
    if (str_equal(d->d_name, "spfexplain")) continue;
    if (str_equal(d->d_name, "spflocalrules")) continue;
    if (str_equal(d->d_name, "srsdomains")) continue;
    if (str_equal(d->d_name, "timeoutconnect")) continue;
    if (str_equal(d->d_name, "timeoutremote")) continue;
    if (str_equal(d->d_name, "timeoutsmtpd")) continue;
    if (str_equal(d->d_name, "tlsdestinations")) continue;
    if (str_equal(d->d_name, "virtualdomains")) continue;
    buffer_puts(buffer_1, "\n");
    buffer_puts(buffer_1, d->d_name);
    buffer_puts(buffer_1, ": I have no idea what this file does.\n");
  }

  buffer_flush(buffer_1);
  _exit(0);
}