CST-agent/src/parliament.c

#ifndef _DEFAULT_SOURCE
#define _DEFAULT_SOURCE
#endif
#include "cst_parliament.h"
#include "cJSON.h"
#include "cst_agent.h"
#include "cst_discover.h"
#include "cst_util.h"
#include "monocypher.h"
#include "os_compat.h"

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

#ifdef _WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif

#define PARL_CONTEXT_MAX (256 * 1024)

static int sync_want_path(char *out, size_t n) {
  char dir[OS_PATH_MAX];
  if (cst_realm_dir(dir, sizeof(dir)) != 0)
    return -1;
  return os_path_join(out, n, dir, "sync.want");
}

void cst_parliament_sync_request(void) {
  char path[OS_PATH_MAX];
  if (sync_want_path(path, sizeof(path)) != 0)
    return;
  FILE *f = fopen(path, "wb");
  if (!f)
    return;
  fputs("1\n", f);
  fclose(f);
}

int cst_parliament_sync_pending(void) {
  char path[OS_PATH_MAX];
  if (sync_want_path(path, sizeof(path)) != 0)
    return 0;
  FILE *f = fopen(path, "rb");
  if (!f)
    return 0;
  fclose(f);
  return 1;
}

void cst_parliament_sync_ack(void) {
  char path[OS_PATH_MAX];
  if (sync_want_path(path, sizeof(path)) == 0)
    remove(path);
}

int cst_parliament_default_instance(char *out, size_t n) {
  if (!out || n < 2)
    return -1;
  const char *env = getenv("CST_INSTANCE_ID");
  if (env && env[0]) {
    snprintf(out, n, "%s", env);
    return 0;
  }
  char host[128] = {0};
#ifdef _WIN32
  DWORD hn = (DWORD)sizeof(host);
  if (!GetComputerNameA(host, &hn) || !host[0])
    snprintf(host, sizeof(host), "%s", "seat");
#else
  if (gethostname(host, sizeof(host)) != 0 || !host[0])
    snprintf(host, sizeof(host), "%s", "seat");
  host[sizeof(host) - 1] = 0;
#endif
  size_t j = 0;
  for (size_t i = 0; host[i] && j + 1 < n; i++) {
    unsigned char c = (unsigned char)host[i];
    if (isalnum(c) || c == '-' || c == '_')
      out[j++] = (char)c;
    else if (c == '.' || c == ' ')
      out[j++] = '-';
  }
  out[j] = 0;
  if (!out[0])
    snprintf(out, n, "%s", "seat");
  return 0;
}

int cst_parliament_path(char *out, size_t n) {
  char dir[OS_PATH_MAX];
  if (cst_realm_dir(dir, sizeof(dir)) != 0)
    return -1;
  if (os_mkdir_p(dir, 0700) != 0)
    return -1;
  return os_path_join(out, n, dir, "parliament.json");
}

static int context_path(char *out, size_t n) {
  char dir[OS_PATH_MAX];
  if (cst_realm_dir(dir, sizeof(dir)) != 0)
    return -1;
  return os_path_join(out, n, dir, "parliament.context");
}

int cst_parliament_load(cst_parliament_meta_t *m) {
  if (!m)
    return -1;
  memset(m, 0, sizeof(*m));
  char path[OS_PATH_MAX];
  if (cst_parliament_path(path, sizeof(path)) != 0)
    return -1;
  FILE *f = fopen(path, "rb");
  if (!f) {
    snprintf(m->status, sizeof(m->status), "%s", "idle");
    return 0;
  }
  cst_buf_t b = {0};
  char chunk[4096];
  size_t n;
  while ((n = fread(chunk, 1, sizeof(chunk), f)) && b.len < 256 * 1024)
    cst_buf_append(&b, chunk, n);
  fclose(f);
  cJSON *o = cJSON_Parse(b.buf ? b.buf : "{}");
  cst_buf_free(&b);
  if (!o)
    return -1;
  const cJSON *v;
  v = cJSON_GetObjectItemCaseSensitive(o, "parliament_id");
  if (cJSON_IsString(v))
    snprintf(m->parliament_id, sizeof(m->parliament_id), "%s", v->valuestring);
  v = cJSON_GetObjectItemCaseSensitive(o, "project_id");
  if (cJSON_IsString(v))
    snprintf(m->project_id, sizeof(m->project_id), "%s", v->valuestring);
  v = cJSON_GetObjectItemCaseSensitive(o, "chair_instance");
  if (cJSON_IsString(v))
    snprintf(m->chair_instance, sizeof(m->chair_instance), "%s",
             v->valuestring);
  v = cJSON_GetObjectItemCaseSensitive(o, "chair_device");
  if (cJSON_IsString(v))
    snprintf(m->chair_device, sizeof(m->chair_device), "%s", v->valuestring);
  v = cJSON_GetObjectItemCaseSensitive(o, "revision");
  if (cJSON_IsNumber(v))
    m->revision = (unsigned long)v->valuedouble;
  v = cJSON_GetObjectItemCaseSensitive(o, "status");
  if (cJSON_IsString(v))
    snprintf(m->status, sizeof(m->status), "%s", v->valuestring);
  else
    snprintf(m->status, sizeof(m->status), "%s", "idle");
  cJSON_Delete(o);
  return 0;
}

int cst_parliament_save(const cst_parliament_meta_t *m) {
  if (!m)
    return -1;
  char path[OS_PATH_MAX], tmp[OS_PATH_MAX + 8];
  if (cst_parliament_path(path, sizeof(path)) != 0)
    return -1;
  if (snprintf(tmp, sizeof(tmp), "%s.tmp", path) >= (int)sizeof(tmp))
    return -1;
  cJSON *o = cJSON_CreateObject();
  cJSON_AddStringToObject(o, "parliament_id", m->parliament_id);
  cJSON_AddStringToObject(o, "project_id", m->project_id);
  cJSON_AddStringToObject(o, "chair_instance", m->chair_instance);
  cJSON_AddStringToObject(o, "chair_device", m->chair_device);
  cJSON_AddNumberToObject(o, "revision", (double)m->revision);
  cJSON_AddStringToObject(o, "status", m->status);
  char *txt = cJSON_PrintUnformatted(o);
  cJSON_Delete(o);
  if (!txt)
    return -1;
  FILE *f = fopen(tmp, "wb");
  int ok = 0;
  if (f) {
    ok = fputs(txt, f) >= 0 && fputc('\n', f) >= 0;
    if (fclose(f) != 0)
      ok = 0;
  }
  free(txt);
  if (!ok) {
    remove(tmp);
    return -1;
  }
  if (os_rename_replace(tmp, path) != 0) {
    remove(tmp);
    return -1;
  }
  return 0;
}

char *cst_parliament_device_context(void) {
  cst_buf_t b = {0};
  char host[128] = "unknown", cwd[OS_PATH_MAX] = ".";
#ifdef _WIN32
  DWORD n = sizeof(host);
  GetComputerNameA(host, &n);
  _getcwd(cwd, (int)sizeof(cwd));
  cst_buf_printf(&b, "os=windows\nhost=%s\ncwd=%s\npid=%d\n", host, cwd,
                 (int)GetCurrentProcessId());
#else
  gethostname(host, sizeof(host));
  if (!getcwd(cwd, sizeof(cwd)))
    snprintf(cwd, sizeof(cwd), ".");
  cst_buf_printf(&b, "os=unix\nhost=%s\ncwd=%s\npid=%d\n", host, cwd,
                 (int)getpid());
#ifdef __linux__
  cst_buf_puts(&b, "platform=linux\n");
#elif defined(__APPLE__)
  cst_buf_puts(&b, "platform=macos\n");
#endif
#endif
  return cst_buf_steal(&b);
}

int cst_parliament_claim_chair(const char *instance_id,
                               const char *device_label) {
  if (!instance_id || !instance_id[0])
    return -1;
  cst_parliament_meta_t m;
  if (cst_parliament_load(&m) != 0)
    return -1;
  if (!m.parliament_id[0]) {
    snprintf(m.parliament_id, sizeof(m.parliament_id), "parl-%ld",
             (long)time(NULL));
    snprintf(m.status, sizeof(m.status), "%s", "open");
  }
  /* Single chair: logging-in device always takes the chair (user will). */
  snprintf(m.chair_instance, sizeof(m.chair_instance), "%s", instance_id);
  snprintf(m.chair_device, sizeof(m.chair_device), "%s",
           device_label ? device_label : "");
  m.revision++;
  snprintf(m.status, sizeof(m.status), "%s", "open");
  return cst_parliament_save(&m);
}

static int context_write_file(const char *text) {
  char path[OS_PATH_MAX], tmp[OS_PATH_MAX + 8];
  if (context_path(path, sizeof(path)) != 0)
    return -1;
  if (snprintf(tmp, sizeof(tmp), "%s.tmp", path) >= (int)sizeof(tmp))
    return -1;
  FILE *f = fopen(tmp, "wb");
  if (!f)
    return -1;
  int ok = fputs(text ? text : "", f) >= 0;
  if (fclose(f) != 0)
    ok = 0;
  if (!ok) {
    remove(tmp);
    return -1;
  }
  if (os_rename_replace(tmp, path) != 0) {
    remove(tmp);
    return -1;
  }
  return 0;
}

int cst_parliament_context_put(const char *text) {
  if (context_write_file(text) != 0)
    return -1;
  cst_parliament_meta_t m;
  if (cst_parliament_load(&m) == 0) {
    m.revision++;
    cst_parliament_save(&m);
  }
  cst_parliament_sync_request();
  return 0;
}

char *cst_parliament_context_get(void) {
  char path[OS_PATH_MAX];
  if (context_path(path, sizeof(path)) != 0)
    return strdup("");
  FILE *f = fopen(path, "rb");
  if (!f)
    return strdup("");
  cst_buf_t b = {0};
  char chunk[4096];
  size_t n;
  while ((n = fread(chunk, 1, sizeof(chunk), f)) && b.len < 2 * 1024 * 1024)
    cst_buf_append(&b, chunk, n);
  fclose(f);
  return b.buf ? cst_buf_steal(&b) : strdup("");
}

int cst_parliament_context_append(const char *seat_id, const char *kind,
                                  const char *body) {
  if (!body || !body[0])
    return -1;
  const char *seat = seat_id && seat_id[0] ? seat_id : "unknown";
  const char *k = kind && kind[0] ? kind : "note";
  char *prev = cst_parliament_context_get();
  cst_buf_t b = {0};
  if (prev && prev[0]) {
    cst_buf_puts(&b, prev);
    if (prev[strlen(prev) - 1] != '\n')
      cst_buf_puts(&b, "\n");
  }
  free(prev);
  time_t now = time(NULL);
  struct tm tm;
#ifdef _WIN32
  gmtime_s(&tm, &now);
#else
  gmtime_r(&now, &tm);
#endif
  char ts[40];
  strftime(ts, sizeof(ts), "%Y-%m-%dT%H:%MZ", &tm);
  cst_buf_printf(&b, "---\nseat=%s kind=%s at=%s\n", seat, k, ts);
  cst_buf_puts(&b, body);
  if (body[strlen(body) - 1] != '\n')
    cst_buf_puts(&b, "\n");
  /* Keep the newest tail when the shared blob grows too large. */
  if (b.len > PARL_CONTEXT_MAX) {
    size_t keep = PARL_CONTEXT_MAX - 64;
    const char *start = b.buf + (b.len - keep);
    while (start > b.buf && *start != '\n')
      start++;
    if (*start == '\n')
      start++;
    cst_buf_t slim = {0};
    cst_buf_puts(&slim, "…(earlier parliament notes truncated)\n");
    cst_buf_append(&slim, start, (size_t)(b.buf + b.len - start));
    cst_buf_free(&b);
    b = slim;
  }
  int rc = cst_parliament_context_put(b.buf);
  cst_buf_free(&b);
  return rc;
}

int cst_parliament_new_project(const char *project_id) {
  cst_parliament_meta_t m;
  memset(&m, 0, sizeof(m));
  snprintf(m.parliament_id, sizeof(m.parliament_id), "parl-%ld",
           (long)time(NULL));
  snprintf(m.project_id, sizeof(m.project_id), "%s",
           project_id && project_id[0] ? project_id : "default");
  snprintf(m.status, sizeof(m.status), "%s", "open");
  m.revision = 1;
  /* Keep chair empty until next login claims it. */
  cst_parliament_session_clear();
  (void)cst_parliament_daemon_stop();
  if (cst_parliament_save(&m) != 0)
    return -1;
  return context_write_file("");
}

char *cst_parliament_login(const char *password, const char *instance_id,
                           const char *device_label, char *err, size_t err_sz) {
  if (err && err_sz)
    err[0] = 0;
  if (!password || !password[0] || !instance_id || !instance_id[0]) {
    if (err && err_sz)
      snprintf(err, err_sz, "password and instance id required");
    return NULL;
  }
  char dir[OS_PATH_MAX];
  if (cst_realm_dir(dir, sizeof(dir)) != 0) {
    if (err && err_sz)
      snprintf(err, err_sz, "realm dir missing");
    return NULL;
  }
  if (!cst_realm_is_password_mode(dir)) {
    if (err && err_sz)
      snprintf(err, err_sz, "realm is not password mode; run --realm-password-init");
    return NULL;
  }
  cst_realm_keys_t keys;
  if (cst_realm_unlock_password(dir, password, &keys) != 0) {
    if (err && err_sz)
      snprintf(err, err_sz, "login failed (bad password)");
    return NULL;
  }
  /* Ensure this device has an enrolled instance cert. */
  cst_realm_cert_t cert;
  uint8_t sk[64];
  if (cst_realm_instance_load(instance_id, &cert, sk) != 0) {
    uint8_t seed[32];
    if (cst_realm_enroll(&keys, instance_id, device_label, 0, &cert, seed, sk) !=
            0 ||
        cst_realm_instance_save(instance_id, &cert, seed) != 0) {
      if (err && err_sz)
        snprintf(err, err_sz, "enroll instance failed");
      crypto_wipe(keys.seed, sizeof(keys.seed));
      crypto_wipe(keys.sk, sizeof(keys.sk));
      return NULL;
    }
  }
  cst_parliament_meta_t before;
  cst_parliament_load(&before);
  char prev_chair[64];
  snprintf(prev_chair, sizeof(prev_chair), "%s", before.chair_instance);
  if (cst_parliament_claim_chair(instance_id, device_label) != 0) {
    if (err && err_sz)
      snprintf(err, err_sz, "claim chair failed");
    crypto_wipe(keys.seed, sizeof(keys.seed));
    crypto_wipe(keys.sk, sizeof(keys.sk));
    return NULL;
  }
  char *ctx = cst_parliament_context_get();
  char *dev = cst_parliament_device_context();
  cst_buf_t hand = {0};
  cst_buf_puts(&hand, "LOGIN_OK\n");
  cst_buf_printf(&hand, "chair=%s\n", instance_id);
  if (prev_chair[0] && strcmp(prev_chair, instance_id) != 0)
    cst_buf_printf(&hand, "handover_from=%s\n", prev_chair);
  else
    cst_buf_puts(&hand, "handover_from=\n");
  cst_buf_printf(&hand, "device_context=\n%s", dev ? dev : "");
  cst_buf_puts(&hand, "--- parliament_context ---\n");
  cst_buf_puts(&hand, ctx ? ctx : "");
  free(ctx);
  free(dev);
  if (cst_parliament_session_write(instance_id) != 0) {
    if (err && err_sz)
      snprintf(err, err_sz, "session ticket write failed");
    crypto_wipe(keys.seed, sizeof(keys.seed));
    crypto_wipe(keys.sk, sizeof(keys.sk));
    crypto_wipe(sk, sizeof(sk));
    cst_buf_free(&hand);
    return NULL;
  }
  crypto_wipe(keys.seed, sizeof(keys.seed));
  crypto_wipe(keys.sk, sizeof(keys.sk));
  crypto_wipe(sk, sizeof(sk));
  cst_parliament_sync_request();
  return cst_buf_steal(&hand);
}

char *cst_parliament_seat_join(const char *password, const char *instance_id,
                               const char *device_label, char *err,
                               size_t err_sz) {
  if (err && err_sz)
    err[0] = 0;
  if (!password || !password[0] || !instance_id || !instance_id[0]) {
    if (err && err_sz)
      snprintf(err, err_sz, "password and instance id required");
    return NULL;
  }
  char dir[OS_PATH_MAX];
  if (cst_realm_dir(dir, sizeof(dir)) != 0) {
    if (err && err_sz)
      snprintf(err, err_sz, "realm dir missing");
    return NULL;
  }
  if (!cst_realm_is_password_mode(dir)) {
    if (err && err_sz)
      snprintf(err, err_sz, "realm is not password mode");
    return NULL;
  }
  cst_realm_keys_t keys;
  if (cst_realm_unlock_password(dir, password, &keys) != 0) {
    if (err && err_sz)
      snprintf(err, err_sz, "join failed (bad password)");
    return NULL;
  }
  cst_realm_cert_t cert;
  uint8_t sk[64];
  if (cst_realm_instance_load(instance_id, &cert, sk) != 0) {
    uint8_t seed[32];
    if (cst_realm_enroll(&keys, instance_id, device_label, 0, &cert, seed, sk) !=
            0 ||
        cst_realm_instance_save(instance_id, &cert, seed) != 0) {
      if (err && err_sz)
        snprintf(err, err_sz, "enroll instance failed");
      crypto_wipe(keys.seed, sizeof(keys.seed));
      crypto_wipe(keys.sk, sizeof(keys.sk));
      return NULL;
    }
  }
  cst_parliament_meta_t m;
  cst_parliament_load(&m);
  int as_chair = 0;
  if (!m.chair_instance[0]) {
    if (cst_parliament_claim_chair(instance_id, device_label) != 0) {
      if (err && err_sz)
        snprintf(err, err_sz, "claim vacant chair failed");
      crypto_wipe(keys.seed, sizeof(keys.seed));
      crypto_wipe(keys.sk, sizeof(keys.sk));
      crypto_wipe(sk, sizeof(sk));
      return NULL;
    }
    as_chair = 1;
  } else if (strcmp(m.chair_instance, instance_id) == 0)
    as_chair = 1;
  cst_parliament_load(&m);
  if (cst_parliament_session_write(instance_id) != 0) {
    if (err && err_sz)
      snprintf(err, err_sz, "session ticket write failed");
    crypto_wipe(keys.seed, sizeof(keys.seed));
    crypto_wipe(keys.sk, sizeof(keys.sk));
    crypto_wipe(sk, sizeof(sk));
    return NULL;
  }
  char *ctx = cst_parliament_context_get();
  char *dev = cst_parliament_device_context();
  cst_buf_t hand = {0};
  cst_buf_puts(&hand, "JOIN_OK\n");
  cst_buf_printf(&hand, "seat=%s\n", instance_id);
  cst_buf_printf(&hand, "role=%s\n", as_chair ? "chair" : "member");
  cst_buf_printf(&hand, "chair=%s\n",
                 m.chair_instance[0] ? m.chair_instance : "");
  cst_buf_printf(&hand, "device_context=\n%s", dev ? dev : "");
  cst_buf_puts(&hand, "--- parliament_context ---\n");
  cst_buf_puts(&hand, ctx ? ctx : "");
  free(ctx);
  free(dev);
  crypto_wipe(keys.seed, sizeof(keys.seed));
  crypto_wipe(keys.sk, sizeof(keys.sk));
  crypto_wipe(sk, sizeof(sk));
  return cst_buf_steal(&hand);
}

static int session_path(char *out, size_t n) {
  char dir[OS_PATH_MAX];
  if (cst_realm_dir(dir, sizeof(dir)) != 0)
    return -1;
  return os_path_join(out, n, dir, "chair.session");
}

int cst_parliament_session_write(const char *instance_id) {
  if (!instance_id || !instance_id[0])
    return -1;
  char path[OS_PATH_MAX], tmp[OS_PATH_MAX + 8];
  if (session_path(path, sizeof(path)) != 0)
    return -1;
  if (snprintf(tmp, sizeof(tmp), "%s.tmp", path) >= (int)sizeof(tmp))
    return -1;
  FILE *f = fopen(tmp, "wb");
  if (!f)
    return -1;
  int ok = fprintf(f, "instance=%s\nissued=%ld\n", instance_id,
                   (long)time(NULL)) > 0;
  if (fclose(f) != 0)
    ok = 0;
  if (!ok) {
    remove(tmp);
    return -1;
  }
  if (os_rename_replace(tmp, path) != 0) {
    remove(tmp);
    return -1;
  }
  return 0;
}

int cst_parliament_session_ok(char *instance_id_out, size_t n) {
  char path[OS_PATH_MAX];
  if (session_path(path, sizeof(path)) != 0)
    return 0;
  FILE *f = fopen(path, "rb");
  if (!f)
    return 0;
  char line[256], iid[64] = {0};
  long issued = 0;
  while (fgets(line, sizeof(line), f)) {
    if (!strncmp(line, "instance=", 9)) {
      const char *p = line + 9;
      size_t i = 0;
      while (p[i] && p[i] != '\n' && p[i] != '\r' && i + 1 < sizeof(iid)) {
        iid[i] = p[i];
        i++;
      }
      iid[i] = 0;
    } else if (!strncmp(line, "issued=", 7))
      issued = atol(line + 7);
  }
  fclose(f);
  if (!iid[0] || issued <= 0)
    return 0;
  /* Ticket valid for 24h of wall clock. */
  long now = (long)time(NULL);
  if (now < issued || now - issued > 86400)
    return 0;
  cst_parliament_meta_t m;
  if (cst_parliament_load(&m) != 0)
    return 0;
  /* Any enrolled seat may hold a ticket while the parliament is open.
   * Chair exclusivity is tracked in meta, not by invalidating member seats. */
  if (!m.status[0] || !strcmp(m.status, "idle") || !strcmp(m.status, "dissolved"))
    return 0;
  cst_realm_cert_t cert;
  uint8_t sk[64];
  if (cst_realm_instance_load(iid, &cert, sk) != 0)
    return 0;
  crypto_wipe(sk, sizeof(sk));
  if (instance_id_out && n)
    snprintf(instance_id_out, n, "%s", iid);
  return 1;
}

int cst_parliament_is_chair(void) {
  char sid[64] = {0};
  if (!cst_parliament_session_ok(sid, sizeof(sid)))
    return 0;
  cst_parliament_meta_t m;
  if (cst_parliament_load(&m) != 0 || !m.chair_instance[0])
    return 0;
  return strcmp(m.chair_instance, sid) == 0;
}

void cst_parliament_session_clear(void) {
  char path[OS_PATH_MAX];
  if (session_path(path, sizeof(path)) == 0)
    remove(path);
}

int cst_parliament_apply_sync(unsigned long revision, const char *parliament_id,
                              const char *project_id, const char *chair,
                              const char *context) {
  cst_parliament_meta_t m;
  if (cst_parliament_load(&m) != 0)
    return -1;
  if (revision <= m.revision)
    return 0;
  if (parliament_id && parliament_id[0])
    snprintf(m.parliament_id, sizeof(m.parliament_id), "%s", parliament_id);
  if (project_id)
    snprintf(m.project_id, sizeof(m.project_id), "%s", project_id);
  if (chair) {
    char local_sid[64] = {0};
    int had = cst_parliament_session_ok(local_sid, sizeof(local_sid));
    /* Only demote/clear when this seat previously held the chair. */
    if (chair[0] && had && m.chair_instance[0] &&
        !strcmp(local_sid, m.chair_instance) && strcmp(local_sid, chair) != 0)
      cst_parliament_session_clear();
    if (!chair[0] && had && m.chair_instance[0] &&
        !strcmp(local_sid, m.chair_instance))
      cst_parliament_session_clear();
    snprintf(m.chair_instance, sizeof(m.chair_instance), "%s", chair);
  }
  m.revision = revision;
  snprintf(m.status, sizeof(m.status), "%s", "open");
  if (context_write_file(context ? context : "") != 0)
    return -1;
  return cst_parliament_save(&m);
}

int cst_parliament_is_active(void) {
  /* Solo (legacy_workers) is the default for single-machine execution.
   * Password Realm alone no longer forces parliament — that starved task /
   * worker_* / runtime tools. Opt in via CST_COLLABORATION / settings, or
   * when an open parliament meta already exists. */
  const char *mode = getenv("CST_COLLABORATION");
  if (mode && mode[0])
    return strcmp(mode, "parliament") == 0;
  cst_settings_t s;
  if (cst_settings_load(&s) == 0 && s.collaboration[0])
    return strcmp(s.collaboration, "parliament") == 0;
  cst_parliament_meta_t m;
  if (cst_parliament_load(&m) == 0 && m.status[0] &&
      strcmp(m.status, "idle") != 0 && strcmp(m.status, "dissolved") != 0)
    return 1;
  return 0;
}

char *cst_parliament_status_text(void) {
  cst_buf_t b = {0};
  char dir[OS_PATH_MAX];
  if (cst_realm_dir(dir, sizeof(dir)) != 0) {
    cst_buf_puts(&b, "parliament  (no realm dir)\n");
    return cst_buf_steal(&b);
  }
  int pw = cst_realm_is_password_mode(dir);
  cst_parliament_meta_t m;
  memset(&m, 0, sizeof(m));
  cst_parliament_load(&m);
  char sid[64] = {0};
  int sess = cst_parliament_session_ok(sid, sizeof(sid));
  int svc_pid = 0, svc_port = 0;
  char svc_id[64] = {0};
  int svc = cst_parliament_daemon_info(&svc_pid, svc_id, sizeof(svc_id),
                                      &svc_port) == 0;
  cst_buf_printf(&b, "realm       %s\n", pw ? "password" : "file-keys/legacy");
  cst_buf_printf(&b, "parliament  %s  project=%s  rev=%lu\n",
                 m.status[0] ? m.status : "idle",
                 m.project_id[0] ? m.project_id : "-",
                 m.revision);
  cst_buf_printf(&b, "chair       %s%s%s\n",
                 m.chair_instance[0] ? m.chair_instance : "(none)",
                 m.chair_device[0] ? " @ " : "", m.chair_device);
  cst_buf_printf(&b, "login       %s%s%s\n", sess ? "ok" : "required",
                 sess && sid[0] ? " as " : "", sess ? sid : "");
  if (svc)
    cst_buf_printf(&b, "service     running pid=%d id=%s port=%d\n", svc_pid,
                   svc_id[0] ? svc_id : "-", svc_port);
  else
    cst_buf_puts(&b, "service     stopped\n");
  cst_buf_printf(&b, "role        %s\n",
                 sess ? (cst_parliament_is_chair() ? "chair" : "member")
                      : "logged-out");
  cst_buf_puts(&b, "peer_sync   sealed (X25519 + XChaCha20-Poly1305)\n");
  {
    cst_peer_info_t peers[16];
    int np = cst_discover_local_list(NULL, peers, 16);
    if (np > 0) {
      cst_buf_puts(&b, "peers\n");
      for (int i = 0; i < np; i++) {
        int is_chair = m.chair_instance[0] &&
                       !strcmp(peers[i].instance_id, m.chair_instance);
        cst_buf_printf(&b, "  - %s%s port=%d\n", peers[i].instance_id,
                       is_chair ? " (chair)" : "", peers[i].port);
      }
    } else {
      cst_buf_puts(&b, "peers       (none discovered yet)\n");
    }
  }
  return cst_buf_steal(&b);
}