#define _POSIX_C_SOURCE 200809L
#include "cst_parliament.h"
#include "cst_realm.h"
#include "cst_test_util.h"
#include "os_compat.h"

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

int main(void) {
  char dir[2048], cfg[512];
  assert(!test_tmpdir(dir, sizeof(dir), "parliament"));
  assert(snprintf(cfg, sizeof(cfg), "%s/cfg", dir) < (int)sizeof(cfg));
  assert(!os_mkdir_p(cfg, 0700));
  setenv("XDG_CONFIG_HOME", cfg, 1);

  char realm[OS_PATH_MAX];
  assert(cst_realm_dir(realm, sizeof(realm)) == 0);
  assert(cst_realm_init_password(realm, "correct horse battery") == 0);
  assert(cst_realm_is_password_mode(realm));

  cst_realm_keys_t bad, good;
  assert(cst_realm_unlock_password(realm, "wrong", &bad) != 0);
  assert(cst_realm_unlock_password(realm, "correct horse battery", &good) == 0);
  /* Password Realm alone must not force parliament (solo keeps workers). */
  unsetenv("CST_COLLABORATION");
  assert(!cst_parliament_is_active());

  char err[128];
  char *hand = cst_parliament_login("correct horse battery", "phone-1", "pixel",
                                    err, sizeof(err));
  assert(hand && strstr(hand, "LOGIN_OK") && strstr(hand, "chair=phone-1"));
  free(hand);
  assert(cst_parliament_is_chair());
  assert(cst_parliament_sync_pending()); /* login bumps context path request */

  cst_parliament_meta_t m;
  assert(cst_parliament_load(&m) == 0);
  assert(!strcmp(m.chair_instance, "phone-1"));

  assert(cst_parliament_context_put("shared agenda v1") == 0);
  assert(cst_parliament_sync_pending());
  cst_parliament_sync_ack();
  assert(!cst_parliament_sync_pending());

  hand = cst_parliament_login("correct horse battery", "laptop-2", "thinkpad",
                              err, sizeof(err));
  assert(hand && strstr(hand, "handover_from=phone-1"));
  assert(strstr(hand, "shared agenda v1"));
  free(hand);
  assert(cst_parliament_load(&m) == 0);
  assert(!strcmp(m.chair_instance, "laptop-2"));
  assert(cst_parliament_is_chair());

  assert(cst_parliament_session_ok(NULL, 0));

  /* Member seat can join without stealing the chair. */
  hand = cst_parliament_seat_join("correct horse battery", "tablet-3", "pad",
                                  err, sizeof(err));
  assert(hand && strstr(hand, "JOIN_OK") && strstr(hand, "role=member"));
  assert(strstr(hand, "chair=laptop-2"));
  free(hand);
  /* Join rewrote the local seat ticket to tablet-3 (this process). */
  {
    char sid[64] = {0};
    assert(cst_parliament_session_ok(sid, sizeof(sid)));
    assert(!strcmp(sid, "tablet-3"));
    assert(!cst_parliament_is_chair());
  }
  assert(cst_parliament_load(&m) == 0);
  assert(!strcmp(m.chair_instance, "laptop-2"));

  assert(cst_parliament_context_append("tablet-3", "status",
                                       "ready to take the UI slice") == 0);
  char *ctx = cst_parliament_context_get();
  assert(ctx && strstr(ctx, "shared agenda v1"));
  assert(strstr(ctx, "seat=tablet-3") && strstr(ctx, "ready to take the UI"));
  free(ctx);
  assert(cst_parliament_sync_pending());
  cst_parliament_sync_ack();

  assert(cst_parliament_new_project("proj-b") == 0);
  ctx = cst_parliament_context_get();
  assert(ctx && ctx[0] == 0);
  free(ctx);
  assert(cst_parliament_load(&m) == 0);
  assert(!strcmp(m.project_id, "proj-b"));
  assert(m.chair_instance[0] == 0);
  assert(!cst_parliament_session_ok(NULL, 0));

  hand = cst_parliament_login("correct horse battery", "local-a", "dev", err,
                              sizeof(err));
  assert(hand && strstr(hand, "LOGIN_OK"));
  free(hand);
  assert(cst_parliament_is_chair());
  assert(cst_parliament_session_ok(NULL, 0));
  assert(cst_parliament_apply_sync(9, "parl-x", "proj-c", "chair-z",
                                   "synced-body") == 0);
  ctx = cst_parliament_context_get();
  assert(ctx && strstr(ctx, "synced-body"));
  free(ctx);
  assert(cst_parliament_load(&m) == 0);
  assert(m.revision == 9);
  assert(!strcmp(m.chair_instance, "chair-z"));
  /* Remote chair takeover clears the demoted chair's local ticket. */
  assert(!cst_parliament_session_ok(NULL, 0));

  char *st = cst_parliament_status_text();
  assert(st && strstr(st, "parliament"));
  assert(strstr(st, "service"));
  assert(strstr(st, "peer_sync") && strstr(st, "sealed"));
  assert(strstr(st, "role"));
  free(st);
  assert(cst_parliament_is_active());
  assert(cst_parliament_daemon_info(NULL, NULL, 0, NULL) != 0);

  char def[64];
  assert(cst_parliament_default_instance(def, sizeof(def)) == 0);
  assert(def[0]);

  test_rmrf(dir);
  puts("test_parliament: OK");
  return 0;
}