/* Реальные SQLite, подписи и Merkle-адаптер: версии, отмены, конфликты и rollback. */
#include "../src/chat/chat_feedback.c"
#include <assert.h>

static const uint8_t owner_private[32] = {9};
static int events;

enum sql_fault { F_NONE, F_BEGIN, F_PREPARE, F_BIND, F_STEP, F_CHANGES, F_FINALIZE, F_COMMIT };
enum sql_operation { F_GET, F_PUT };
static enum sql_fault injected;
static enum sql_operation injected_operation;
static int injected_bind, failed_rollback, last_put;

static int fault_statement(const char* sql) {
    const char* prefix = injected_operation == F_GET ? "SELECT message_id,node_id,kind,ver,data,signature FROM feedback_1001 " :
        "INSERT INTO feedback_1001(record_key,bucket,message_id,node_id,kind,ver,data,signature)";
    return sql && !strncmp(sql, prefix, strlen(prefix));
}

static int take_fault(enum sql_fault point, const char* sql, int index) {
    if (injected != point || (sql && !fault_statement(sql)) || (point == F_BIND && index != injected_bind)) return 0;
    injected = F_NONE;
    DEBUG_WARN(DEBUG_CATEGORY_CHAT_SYNC, "feedback test: injected stage=%d operation=%d bind=%d", point, injected_operation, index); return 1;
}

extern int __real_sqlite3_exec(sqlite3*, const char*, int (*)(void*, int, char**, char**), void*, char**);
int __wrap_sqlite3_exec(sqlite3* db, const char* sql, int (*cb)(void*, int, char**, char**), void* arg, char** error) {
    if ((!strcmp(sql, "SAVEPOINT feedback_update") || strstr(sql, "BEGIN IMMEDIATE /* feedback")) && take_fault(F_BEGIN, NULL, 0))
        return SQLITE_BUSY;
    if ((!strcmp(sql, "RELEASE feedback_update") || !strncmp(sql, "COMMIT /* feedback", 18)) && take_fault(F_COMMIT, NULL, 0))
        return SQLITE_BUSY;
    if (failed_rollback && !strncmp(sql, "ROLLBACK", 8)) {
        failed_rollback = 0; DEBUG_WARN(DEBUG_CATEGORY_CHAT_SYNC, "feedback test: injected rollback failure"); return SQLITE_IOERR;
    }
    return __real_sqlite3_exec(db, sql, cb, arg, error);
}

extern int __real_sqlite3_prepare_v2(sqlite3*, const char*, int, sqlite3_stmt**, const char**);
int __wrap_sqlite3_prepare_v2(sqlite3* db, const char* sql, int length, sqlite3_stmt** st, const char** tail) {
    if (take_fault(F_PREPARE, sql, 0)) { *st = NULL; return SQLITE_NOMEM; }
    return __real_sqlite3_prepare_v2(db, sql, length, st, tail);
}

extern int __real_sqlite3_bind_blob(sqlite3_stmt*, int, const void*, int, void (*)(void*));
int __wrap_sqlite3_bind_blob(sqlite3_stmt* st, int index, const void* bytes, int length, void (*destroy)(void*)) {
    if (take_fault(F_BIND, sqlite3_sql(st), index)) return SQLITE_NOMEM;
    return __real_sqlite3_bind_blob(st, index, bytes, length, destroy);
}
extern int __real_sqlite3_bind_int64(sqlite3_stmt*, int, sqlite3_int64);
int __wrap_sqlite3_bind_int64(sqlite3_stmt* st, int index, sqlite3_int64 value) {
    if (take_fault(F_BIND, sqlite3_sql(st), index)) return SQLITE_NOMEM;
    return __real_sqlite3_bind_int64(st, index, value);
}
extern int __real_sqlite3_bind_int(sqlite3_stmt*, int, int);
int __wrap_sqlite3_bind_int(sqlite3_stmt* st, int index, int value) {
    if (take_fault(F_BIND, sqlite3_sql(st), index)) return SQLITE_NOMEM;
    return __real_sqlite3_bind_int(st, index, value);
}
extern int __real_sqlite3_step(sqlite3_stmt*);
int __wrap_sqlite3_step(sqlite3_stmt* st) {
    const char* sql = sqlite3_sql(st); last_put = !strncmp(sql, "INSERT INTO feedback_1001(", 26);
    if (take_fault(F_STEP, sql, 0)) return SQLITE_IOERR;
    return __real_sqlite3_step(st);
}
extern int __real_sqlite3_changes(sqlite3*);
int __wrap_sqlite3_changes(sqlite3* db) {
    if (last_put && take_fault(F_CHANGES, NULL, 0)) return 0;
    return __real_sqlite3_changes(db);
}
extern int __real_sqlite3_finalize(sqlite3_stmt*);
int __wrap_sqlite3_finalize(sqlite3_stmt* st) {
    int fail = st && take_fault(F_FINALIZE, sqlite3_sql(st), 0);
    int rc = __real_sqlite3_finalize(st); return fail ? SQLITE_IOERR : rc;
}

/* Событие должно видеть опубликованную транзакцию. */
static void on_event(struct UTUN_INSTANCE* inst, int type, const uint8_t* data, int len) {
    (void)data; (void)len;
    if (type == CHAT_EVT_FEEDBACK_CHANGED) { assert(sqlite3_get_autocommit(inst->topo_sqlite_db)); events++; }
}

static void public_key(const uint8_t priv[32], uint8_t pub[32]) {
    EVP_PKEY* pk = EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, NULL, priv, 32); assert(pk);
    size_t len = 32; assert(EVP_PKEY_get_raw_public_key(pk, pub, &len) == 1); EVP_PKEY_free(pk);
}

/* Экземпляры используют один uasync данного потока, но разные БД и идентичности. */
static void setup(struct UTUN_INSTANCE* inst, struct UASYNC* ua, const char* path) {
    memset(inst, 0, sizeof(*inst)); inst->ua = ua;
    assert(sc_generate_keypair(&inst->my_keys) == SC_OK);
    inst->node_id = sc_derive_node_id_from_pubkey(inst->my_keys.public_key);
    memcpy(inst->my_ed25519_privkey, inst->my_keys.private_key, 32);
    public_key(inst->my_ed25519_privkey, inst->my_ed25519_pubkey);
    assert(sqlite3_open(path ? path : ":memory:", &inst->topo_sqlite_db) == SQLITE_OK);
    assert(topo_node_sqlite_init(inst->topo_sqlite_db) == 0);
    uint8_t x[32] = {3}, ed[32], zero[64] = {0}; public_key(owner_private, ed);
    assert(topo_node_sqlite_channel_put(inst->topo_sqlite_db, "1001", "one", 1, x, NULL, ed, NULL, zero) == 0);
    assert(topo_node_sqlite_channel_put(inst->topo_sqlite_db, "1002", "two", 1, x, NULL, ed, NULL, zero) == 0);
    assert(member_sync_init(inst) == 0 && chat_feedback_init(inst) == 0);
    chat_event_set_handler(inst, on_event);
}

/* Настоящие подписи join и дерева приглашений связывают автора с каналом. */
static void add_member(struct UTUN_INSTANCE* dst, const struct UTUN_INSTANCE* author, const char* channel) {
    uint8_t x[32] = {3}, ed[32], join[64], tree[64], body[112]; public_key(owner_private, ed);
    assert(member_sync_build_join_msg(x, ed, author->node_id, author->my_keys.public_key, 1, body, sizeof(body)) == 112);
    assert(sc_ed25519_sign(author->my_ed25519_privkey, body, sizeof(body), join) == SC_OK);
    assert(member_sync_sign_pubkey(owner_private, author->my_keys.public_key, tree) == 0);
    assert(member_sync_put(dst, channel, author->node_id, author->my_keys.public_key, author->my_ed25519_pubkey,
        join, 1, NULL, 0, "", NULL, NULL, 0, 0, tree) >= 0);
}

static void root(struct UTUN_INSTANCE* inst, uint8_t out[32]) {
    assert(merkle_sync_read_hash(inst, MT_DATA_FEEDBACK, "1001", 0, 0, out) == 0);
}

static void sign_record(const struct UTUN_INSTANCE* author, uint64_t channel, struct chat_feedback_record* r) {
    uint8_t body[FB_WIRE_MAX + 32]; int bytes = fb_signed_bytes(channel, r, body); assert(bytes > 0);
    assert(sc_ed25519_sign(author->my_ed25519_privkey, body, bytes, r->signature) == SC_OK);
}

static void check_author_rejection(struct UTUN_INSTANCE* inst) {
    sqlite3_stmt* st = NULL; uint8_t key[32], tree[64];
    assert(member_sync_sign_pubkey(owner_private, inst->my_keys.public_key, tree) == 0);
    assert(member_sync_verified_ed25519(inst, "1001", inst->node_id, key) == 0 && !memcmp(key, inst->my_ed25519_pubkey, 32));
    assert(sqlite3_prepare_v2(inst->topo_sqlite_db, "UPDATE peers_1001 SET signature=? WHERE node_id=?", -1, &st, NULL) == SQLITE_OK);
    uint8_t zero[64] = {0}; sqlite3_bind_blob(st, 1, zero, 64, SQLITE_STATIC); sqlite3_bind_int64(st, 2, inst->node_id);
    assert(sqlite3_step(st) == SQLITE_DONE && member_sync_verified_ed25519(inst, "1001", inst->node_id, key) < 0);
    sqlite3_reset(st); sqlite3_bind_null(st, 1);
    assert(sqlite3_step(st) == SQLITE_DONE && member_sync_verified_ed25519(inst, "1001", inst->node_id, key) < 0);
    sqlite3_reset(st); tree[0] ^= 1; sqlite3_bind_blob(st, 1, tree, 64, SQLITE_STATIC);
    assert(sqlite3_step(st) == SQLITE_DONE && member_sync_verified_ed25519(inst, "1001", inst->node_id, key) < 0);
    sqlite3_reset(st); tree[0] ^= 1;
    assert(sqlite3_step(st) == SQLITE_DONE && member_sync_verified_ed25519(inst, "1001", inst->node_id, key) == 0);
    sqlite3_finalize(st);
    puts("PASS: root author requires a valid channel signature; zero, missing and forged certificates are rejected");
}

/* Решение владельца проходит штатную проверку подписи и транзакцию MEMBERS. */
static int set_deleted(struct UTUN_INSTANCE* dst, const struct UTUN_INSTANCE* author, unsigned ver, int deleted) {
    char tags[96]; uint8_t body[128], sig[64];
    snprintf(tags, sizeof(tags), "{\"ver\":\"%u\",\"deleted\":\"%s\"}", ver, deleted ? "yes" : "no");
    int len = member_sync_build_owner_msg(author->node_id, tags, body, sizeof(body)); assert(len > 0);
    assert(sc_ed25519_sign(owner_private, body, len, sig) == SC_OK);
    return member_sync_put(dst, "1001", author->node_id, author->my_keys.public_key, author->my_ed25519_pubkey,
        NULL, 0, NULL, 0, NULL, tags, sig, 0, 0, NULL);
}

static void assert_stored(struct UTUN_INSTANCE* inst, const struct chat_feedback_record* expected) {
    struct chat_feedback_record actual;
    assert(chat_feedback_get(inst, "1001", expected->message_id, expected->node_id, expected->kind, &actual) == 1);
    assert(actual.ver == expected->ver && actual.data_len == expected->data_len);
    assert(!memcmp(actual.data, expected->data, actual.data_len) && !memcmp(actual.signature, expected->signature, 64));
}

static int deny_node_keys(void* arg, int action, const char* table, const char* column, const char* db, const char* trigger) {
    (void)arg; (void)column; (void)db; (void)trigger;
    return action == SQLITE_READ && table && !strcmp(table, "nodes") ? SQLITE_DENY : SQLITE_OK;
}

static int veto_commit(void* arg) { int* remaining = arg; return (*remaining)-- > 0; }

/* Исключение, purge и ожидание signer не уничтожают последние состояния и отмены. */
static void membership_regressions(struct UASYNC* ua) {
    struct UTUN_INSTANCE author, target, inviter; setup(&author, ua, NULL); setup(&target, ua, NULL); setup(&inviter, ua, NULL);
    for (unsigned ch = 0; ch < 2; ch++) {
        const char* channel = ch ? "1002" : "1001";
        add_member(&author, &author, channel); add_member(&target, &author, channel); add_member(&target, &target, channel);
    }
    uint8_t message[32] = {11}, cancelled_message[32] = {12}, reaction[] = {1, 0}, answer[] = {1, 0, 0, 0};
    struct chat_feedback_record original[3], newer, local;
    assert(chat_feedback_set(&author, "1001", message, CHAT_FEEDBACK_REACTION, reaction, sizeof(reaction), NULL) == 1);
    assert(chat_feedback_get(&author, "1001", message, author.node_id, CHAT_FEEDBACK_REACTION, &original[0]) == 1);
    assert(chat_feedback_set(&author, "1001", message, CHAT_FEEDBACK_ANSWER, answer, sizeof(answer), NULL) == 1);
    assert(chat_feedback_get(&author, "1001", message, author.node_id, CHAT_FEEDBACK_ANSWER, &original[1]) == 1);
    assert(chat_feedback_set(&author, "1001", cancelled_message, CHAT_FEEDBACK_REACTION, reaction, sizeof(reaction), NULL) == 1);
    assert(chat_feedback_set(&author, "1001", cancelled_message, CHAT_FEEDBACK_REACTION, NULL, 0, NULL) == 1);
    assert(chat_feedback_get(&author, "1001", cancelled_message, author.node_id, CHAT_FEEDBACK_REACTION, &original[2]) == 1);
    for (unsigned i = 0; i < 3; i++) assert(chat_feedback_apply(&target, "1001", &original[i]) == 1);
    assert(chat_feedback_set(&author, "1002", message, CHAT_FEEDBACK_REACTION, reaction, sizeof(reaction), NULL) == 1);
    struct chat_feedback_record other = original[0]; sign_record(&author, 1002, &other);
    assert(chat_feedback_apply(&target, "1002", &other) == 1);
    uint8_t before[32], after[32], empty[32] = {0}, other_root[32], key[32]; root(&target, before);
    assert(merkle_sync_read_hash(&target, MT_DATA_FEEDBACK, "1002", 0, 0, other_root) == 0);
    /* Подписанный профиль меняет MEMBERS, но не запускает feedback и его UI-события. */
    uint8_t profile_join[64], profile_update[64], profile_body[256], profile_x[32] = {3}, profile_ed[32];
    public_key(owner_private, profile_ed);
    int profile_len = member_sync_build_join_msg(profile_x, profile_ed, author.node_id, author.my_keys.public_key,
        1, profile_body, sizeof(profile_body)); assert(profile_len == 112);
    assert(sc_ed25519_sign(author.my_ed25519_privkey, profile_body, profile_len, profile_join) == SC_OK);
    profile_len = member_sync_build_update_msg(profile_join, 2, "{\"name\":\"profile\"}", profile_body, sizeof(profile_body));
    assert(profile_len > 0 && sc_ed25519_sign(author.my_ed25519_privkey, profile_body, profile_len, profile_update) == SC_OK);
    int profile_events = events;
    int profile_changed = member_sync_put(&target, "1001", author.node_id, author.my_keys.public_key, author.my_ed25519_pubkey,
        profile_join, 1, profile_update, 2, "{\"name\":\"profile\"}", NULL, NULL, 0, 0, NULL);
    assert((profile_changed & MS_APPLY_CHANGED) && !(profile_changed & MS_APPLY_FEEDBACK) && events == profile_events);
    root(&target, after); assert(!memcmp(before, after, 32));
    int saved_events = events;
    assert(set_deleted(&target, &author, 1, 1) & MS_APPLY_CHANGED);
    root(&target, after); assert(!memcmp(after, empty, 32) && events > saved_events);
    assert(member_sync_author_key(&target, "1001", author.node_id, key) == MS_AUTHOR_INACTIVE);
    assert(member_sync_author_key(&target, "1001", target.node_id, key) == MS_AUTHOR_ACTIVE);
    assert(member_sync_author_key(&target, "1002", author.node_id, key) == MS_AUTHOR_ACTIVE);
    assert(merkle_sync_read_hash(&target, MT_DATA_FEEDBACK, "1002", 0, 0, after) == 0 && !memcmp(after, other_root, 32));
    for (unsigned i = 0; i < 3; i++) assert_stored(&target, &original[i]);
    merkle_key_t cursor = {{0}}, record_key, next; int more; uint8_t page[2 + 2 * FB_WIRE_MAX]; size_t bytes = sizeof(page);
    assert(fb_key(1001, &original[0], &record_key) == 0);
    assert(fb_page(&target, "1001", merkle_sync_level_prefix(fb_read64(record_key.bytes), 5),
        0, &cursor, page, &bytes, &next, &more) == 0 && bytes == 2 && !page[0] && !page[1] && !more);
    member_sync_destroy(&target); assert(member_sync_init(&target) == 0 && chat_feedback_init(&target) == 0);
    root(&target, after); assert(!memcmp(after, empty, 32));
    for (unsigned i = 0; i < 3; i++) assert_stored(&target, &original[i]);
    assert(set_deleted(&author, &author, 1, 1) & MS_APPLY_CHANGED);
    assert(chat_feedback_set(&author, "1001", message, CHAT_FEEDBACK_REACTION, reaction, sizeof(reaction), NULL) < 0);
    assert(chat_feedback_set(&author, "1001", message, CHAT_FEEDBACK_REACTION, NULL, 0, NULL) < 0);
    assert(set_deleted(&author, &author, 2, 0) & MS_APPLY_CHANGED);
    newer = original[0]; newer.ver++; newer.data[1] = 1; sign_record(&author, 1001, &newer);
    saved_events = events;
    assert(chat_feedback_apply(&target, "1001", &newer) == 0 && events == saved_events);
    assert_stored(&target, &original[0]);
    assert(set_deleted(&target, &author, 2, 0) & MS_APPLY_CHANGED);
    root(&target, after); assert(!memcmp(before, after, 32));
    assert(chat_feedback_apply(&target, "1001", &newer) == 1); original[0] = newer;
    puts("PASS: exclusion/restart retains reaction, answer and cancellation; local no-op is denied; other channel is intact");

    /* Старая страница исключённого автора не блокирует корректное состояние другого. */
    assert(set_deleted(&target, &author, 3, 1) & MS_APPLY_CHANGED);
    local = original[0]; local.node_id = target.node_id; local.ver = 1; sign_record(&target, 1001, &local);
    page[0] = 0; page[1] = 2; int n = fb_encode(&newer, page + 2), m = fb_encode(&local, page + 2 + n);
    assert(n > 0 && m > 0 && fb_apply_page(&target, "1001", target.node_id, page, 2 + n + m) == 0);
    assert_stored(&target, &local); assert_stored(&target, &original[0]);
    assert(set_deleted(&target, &author, 4, 0) & MS_APPLY_CHANGED);
    root(&target, before);
    /* Короткое повреждение сертификата удаляет только участника, а не его feedback. */
    sqlite3_stmt* st = NULL;
    assert(sqlite3_prepare_v2(target.topo_sqlite_db, "UPDATE peers_1001 SET signature=x'01' WHERE node_id=?", -1, &st, NULL) == SQLITE_OK);
    assert(sqlite3_bind_int64(st, 1, (sqlite3_int64)author.node_id) == SQLITE_OK);
    assert(sqlite3_step(st) == SQLITE_DONE); assert(sqlite3_finalize(st) == SQLITE_OK);
    assert(member_sync_verify_and_purge(&target, "1001") == 1);
    assert(member_sync_author_key(&target, "1001", author.node_id, key) == MS_AUTHOR_INACTIVE);
    for (unsigned i = 0; i < 3; i++) assert_stored(&target, &original[i]);
    member_sync_destroy(&target); assert(member_sync_init(&target) == 0 && chat_feedback_init(&target) == 0);
    add_member(&target, &author, "1001"); root(&target, after); assert(!memcmp(before, after, 32));
    struct chat_feedback_record old_cancel = original[2]; old_cancel.ver = 1; old_cancel.data_len = sizeof(reaction);
    memcpy(old_cancel.data, reaction, sizeof(reaction)); sign_record(&author, 1001, &old_cancel);
    assert(chat_feedback_apply(&target, "1001", &old_cancel) == 0); assert_stored(&target, &original[2]);
    puts("PASS: mixed page, physical purge and restored membership preserve the version barrier of cancellations");

    /* Подтверждение автора зависит от ещё неизвестного общего ключа пригласившего. */
    uint8_t channel_x[32] = {3}, channel_ed[32], body[112], join[64], invitation[64]; public_key(owner_private, channel_ed);
    assert(member_sync_build_join_msg(channel_x, channel_ed, author.node_id, author.my_keys.public_key, 2, body, sizeof(body)) == 112);
    assert(sc_ed25519_sign(author.my_ed25519_privkey, body, sizeof(body), join) == SC_OK);
    assert(member_sync_sign_pubkey(inviter.my_ed25519_privkey, author.my_keys.public_key, invitation) == 0);
    struct ms_member_rec update = { .node_id = author.node_id, .x25519 = author.my_keys.public_key,
        .ed25519 = author.my_ed25519_pubkey, .join_sig = join, .join_ts = 2, .userinfo = "",
        .signed_by = inviter.node_id, .signature = invitation };
    assert(member_sync_apply_record(&target, "1001", author.node_id, &update) & MS_APPLY_CHANGED);
    assert(member_sync_author_key(&target, "1001", author.node_id, key) == MS_AUTHOR_PENDING);
    root(&target, after); assert(memcmp(before, after, 32));
    member_sync_destroy(&target); assert(member_sync_init(&target) == 0 && chat_feedback_init(&target) == 0);
    root(&target, after); uint8_t pending_root[32]; memcpy(pending_root, after, 32);
    newer = original[0]; newer.ver++; sign_record(&author, 1001, &newer);
    assert(chat_feedback_apply(&target, "1001", &newer) == 0); assert_stored(&target, &original[0]);
    saved_events = events;
    add_member(&target, &inviter, "1002");
    assert(member_sync_author_key(&target, "1001", author.node_id, key) == MS_AUTHOR_ACTIVE && events > saved_events);
    root(&target, after); assert(!memcmp(before, after, 32) && memcmp(pending_root, after, 32));
    for (unsigned i = 0; i < 3; i++) assert_stored(&target, &original[i]);
    puts("PASS: pending invitation survives restart; signer delivered only through another channel reactivates unchanged feedback");

    /* Отказ чтения не становится штатным пропуском автора. */
    memset(key, 0xa5, sizeof(key));
    assert(sqlite3_set_authorizer(target.topo_sqlite_db, deny_node_keys, NULL) == SQLITE_OK);
    assert(member_sync_author_key(&target, "1001", author.node_id, key) == MS_AUTHOR_ERROR);
    for (unsigned i = 0; i < sizeof(key); i++) assert(key[i] == 0xa5);
    assert(chat_feedback_apply(&target, "1001", &newer) < 0);
    assert(sqlite3_set_authorizer(target.topo_sqlite_db, NULL, NULL) == SQLITE_OK);
    root(&target, after); assert(!memcmp(before, after, 32));
    uint8_t member_before[32], member_after[32];
    assert(merkle_sync_read_hash(&target, MT_DATA_MEMBERS, "1001", 0, 0, member_before) == 0);
    assert(sqlite3_exec(target.topo_sqlite_db, "CREATE TRIGGER fail_feedback_delete BEFORE DELETE ON merkle_tree_hash"
        " WHEN OLD.namespace='1:1001' BEGIN SELECT RAISE(ABORT,'injected feedback index failure'); END", NULL, NULL, NULL) == SQLITE_OK);
    saved_events = events;
    assert(set_deleted(&target, &author, 1, 1) < 0 && events == saved_events);
    assert(sqlite3_get_autocommit(target.topo_sqlite_db));
    assert(member_sync_author_key(&target, "1001", author.node_id, key) == MS_AUTHOR_ACTIVE);
    root(&target, after); assert(!memcmp(before, after, 32));
    assert(merkle_sync_read_hash(&target, MT_DATA_MEMBERS, "1001", 0, 0, member_after) == 0 && !memcmp(member_before, member_after, 32));
    assert(sqlite3_exec(target.topo_sqlite_db, "DROP TRIGGER fail_feedback_delete", NULL, NULL, NULL) == SQLITE_OK);
    assert(set_deleted(&target, &author, 1, 1) & MS_APPLY_CHANGED);
    root(&target, before); saved_events = events; int vetoes = 1;
    sqlite3_commit_hook(target.topo_sqlite_db, veto_commit, &vetoes);
    assert(set_deleted(&target, &author, 2, 0) < 0 && events == saved_events);
    sqlite3_commit_hook(target.topo_sqlite_db, NULL, NULL);
    assert(sqlite3_get_autocommit(target.topo_sqlite_db));
    assert(member_sync_author_key(&target, "1001", author.node_id, key) == MS_AUTHOR_INACTIVE);
    root(&target, after); assert(!memcmp(before, after, 32));
    assert(set_deleted(&target, &author, 2, 0) & MS_APPLY_CHANGED);
    root(&target, before); saved_events = events;
    assert(sqlite3_exec(target.topo_sqlite_db, "BEGIN IMMEDIATE", NULL, NULL, NULL) == SQLITE_OK);
    assert(set_deleted(&target, &author, 3, 1) & MS_APPLY_CHANGED);
    assert(events == saved_events);
    assert(sqlite3_exec(target.topo_sqlite_db, "ROLLBACK", NULL, NULL, NULL) == SQLITE_OK);
    root(&target, after); assert(!memcmp(before, after, 32) && events == saved_events);
    assert(sqlite3_exec(target.topo_sqlite_db, "BEGIN IMMEDIATE", NULL, NULL, NULL) == SQLITE_OK);
    int changes = set_deleted(&target, &author, 3, 1); assert(changes & MS_APPLY_CHANGED);
    assert(sqlite3_exec(target.topo_sqlite_db, "COMMIT", NULL, NULL, NULL) == SQLITE_OK && events == saved_events);
    member_sync_record_committed(&target, "1001", author.node_id, (unsigned)changes); assert(events > saved_events);
    for (unsigned i = 0; i < 3; i++) assert_stored(&target, &original[i]);
    puts("PASS: SQL lookup/index failures, commit veto and outer rollback publish no partial data, roots or events");
    member_sync_destroy(&author); member_sync_destroy(&target); member_sync_destroy(&inviter);
    assert(sqlite3_close(author.topo_sqlite_db) == SQLITE_OK && sqlite3_close(target.topo_sqlite_db) == SQLITE_OK);
    assert(sqlite3_close(inviter.topo_sqlite_db) == SQLITE_OK);
}

/* Диагностика копии профиля: без изменения записей или доступа к приватным ключам. */
static int check_profile_authors(const char* path) {
    struct UTUN_INSTANCE inst = {0};
    assert(sqlite3_open_v2(path, &inst.topo_sqlite_db, SQLITE_OPEN_READONLY, NULL) == SQLITE_OK);
    sqlite3_stmt *channels = NULL, *members = NULL;
    assert(sqlite3_prepare_v2(inst.topo_sqlite_db, "SELECT channel_id FROM channels", -1, &channels, NULL) == SQLITE_OK);
    int total = 0, rc;
    while ((rc = sqlite3_step(channels)) == SQLITE_ROW) {
        const char* channel = (const char*)sqlite3_column_text(channels, 0); char sql[256];
        snprintf(sql, sizeof(sql), "SELECT node_id FROM peers_%s WHERE source=0", channel);
        assert(sqlite3_prepare_v2(inst.topo_sqlite_db, sql, -1, &members, NULL) == SQLITE_OK);
        int step;
        while ((step = sqlite3_step(members)) == SQLITE_ROW) {
            uint8_t key[32]; assert(member_sync_verified_ed25519(&inst, channel, sqlite3_column_int64(members, 0), key) == 0); total++;
        }
        assert(step == SQLITE_DONE); sqlite3_finalize(members); members = NULL;
    }
    assert(rc == SQLITE_DONE); sqlite3_finalize(channels); assert(sqlite3_close(inst.topo_sqlite_db) == SQLITE_OK);
    printf("PASS: all %d authors in the profile have valid node keys, joins and invitation certificates\n", total); return 0;
}

int main(int argc, char** argv) {
    debug_config_init(); debug_set_level(DEBUG_LEVEL_WARN);
    if (argc == 2) return check_profile_authors(argv[1]);
    size_t baseline = u_get_allocated_count();
    struct UASYNC* ua = uasync_create(); assert(ua);
    struct UTUN_INSTANCE source, target; setup(&source, ua, NULL); setup(&target, ua, NULL);
    for (int ch = 0; ch < 2; ch++) {
        const char* channel = ch ? "1002" : "1001";
        add_member(&source, &source, channel); add_member(&target, &source, channel);
        add_member(&source, &target, channel); add_member(&target, &target, channel);
    }
    check_author_rejection(&source);
    uint8_t message[32], other_message[32], nonce[16] = {7};
    assert(chat_message_id(1001, 123, source.node_id, nonce, message) == 0);
    assert(chat_message_id(1002, 123, source.node_id, nonce, other_message) == 0 && memcmp(message, other_message, 32));
    assert(chat_message_id(1001, 123, source.node_id, nonce, other_message) == 0 && !memcmp(message, other_message, 32));
    nonce[15]++;
    assert(chat_message_id(1001, 123, source.node_id, nonce, other_message) == 0 && memcmp(message, other_message, 32));
    puts("PASS: message identity is deterministic and binds channel, timestamp, author and nonce");

    uint64_t ver; struct chat_feedback_record first, second, cancelled, actual;
    uint8_t a[] = {1, 0}, b[] = {1, 1}, answer_data[] = {1, 0, 0, 0};
    assert(chat_feedback_set(&source, "1001", message, CHAT_FEEDBACK_REACTION, a, sizeof(a), &ver) == 1 && ver == 1);
    assert(chat_feedback_get(&source, "1001", message, source.node_id, CHAT_FEEDBACK_REACTION, &first) == 1);
    uint8_t invalid_multi[] = {2, 0, 1};
    assert(chat_feedback_set(&source, "1001", message, CHAT_FEEDBACK_REACTION, invalid_multi, sizeof(invalid_multi), NULL) < 0);
    struct chat_feedback_record invalid = first; invalid.data_len = sizeof(invalid_multi);
    memcpy(invalid.data, invalid_multi, sizeof(invalid_multi));
    uint8_t invalid_body[FB_WIRE_MAX + 32]; int invalid_bytes = fb_signed_bytes(1001, &first, invalid_body);
    assert(invalid_bytes > 4);
    invalid_body[invalid_bytes - 3] = sizeof(invalid_multi); invalid_body[invalid_bytes - 2] = 2; invalid_body[invalid_bytes] = 1;
    assert(sc_ed25519_sign(source.my_ed25519_privkey, invalid_body, invalid_bytes + 1, invalid.signature) == SC_OK);
    assert(chat_feedback_apply(&target, "1001", &invalid) < 0);
    int saved_events = events;
    assert(chat_feedback_set(&source, "1001", message, CHAT_FEEDBACK_REACTION, a, sizeof(a), &ver) == 0 && ver == 1);
    assert(events == saved_events);
    assert(chat_feedback_set(&source, "1001", message, CHAT_FEEDBACK_REACTION, b, sizeof(b), &ver) == 1 && ver == 2);
    assert(chat_feedback_get(&source, "1001", message, source.node_id, CHAT_FEEDBACK_REACTION, &second) == 1);
    assert(chat_feedback_set(&source, "1001", message, CHAT_FEEDBACK_REACTION, NULL, 0, &ver) == 1 && ver == 3);
    assert(chat_feedback_get(&source, "1001", message, source.node_id, CHAT_FEEDBACK_REACTION, &cancelled) == 1);
    assert(cancelled.ver == 3 && !cancelled.data_len);
    assert(chat_feedback_apply(&target, "1001", &cancelled) == 1);
    assert(chat_feedback_apply(&target, "1001", &first) == 0 && chat_feedback_apply(&target, "1001", &second) == 0);
    assert(chat_feedback_get(&target, "1001", message, source.node_id, CHAT_FEEDBACK_REACTION, &actual) == 1);
    assert(actual.ver == 3 && !actual.data_len);
    uint8_t expected[32], received[32]; root(&source, expected); root(&target, received); assert(!memcmp(expected, received, 32));
    puts("PASS: ver increases; duplicates are inert; old states cannot resurrect a cancellation");

    struct chat_feedback_record forged = cancelled; forged.ver++;
    root(&target, expected); saved_events = events;
    assert(chat_feedback_apply(&target, "1001", &forged) < 0 && events == saved_events);
    root(&target, received); assert(!memcmp(expected, received, 32));
    assert(chat_feedback_apply(&target, "1002", &cancelled) < 0);
    forged = cancelled; forged.node_id = target.node_id;
    assert(chat_feedback_apply(&target, "1001", &forged) < 0);
    puts("PASS: signature binds version, channel and author; rejection preserves tree and events");

    struct chat_feedback_record low = first, high = first;
    low.ver = high.ver = 4; low.data[1] = 3; high.data[1] = 4;
    sign_record(&source, 1001, &low); sign_record(&source, 1001, &high);
    assert(chat_feedback_apply(&source, "1001", &low) == 1 && chat_feedback_apply(&source, "1001", &high) == 1);
    assert(chat_feedback_apply(&target, "1001", &high) == 1 && chat_feedback_apply(&target, "1001", &low) == 0);
    root(&source, expected); root(&target, received); assert(!memcmp(expected, received, 32));
    assert(chat_feedback_set(&source, "1001", message, CHAT_FEEDBACK_ANSWER, answer_data, sizeof(answer_data), &ver) == 1 && ver == 1);
    puts("PASS: equal-version conflicts converge in both orders; answer and reaction have independent versions");

    struct chat_feedback_record newer = high, answer = first;
    newer.ver = 5; newer.data[1] = 5; sign_record(&source, 1001, &newer);
    answer.kind = CHAT_FEEDBACK_ANSWER; answer.ver = 2; answer.data_len = sizeof(answer_data);
    memcpy(answer.data, answer_data, sizeof(answer_data)); sign_record(&source, 1001, &answer);
    uint8_t page[2 + 2 * FB_WIRE_MAX]; page[0] = 0; page[1] = 2;
    int n = fb_encode(&newer, page + 2); assert(n > 0);
    int m = fb_encode(&answer, page + 2 + n); assert(m > 0);
    root(&target, expected); saved_events = events;
    page[2 + n + m - 1] ^= 1;
    assert(fb_apply_page(&target, "1001", source.node_id, page, 2 + n + m) < 0);
    root(&target, received); assert(!memcmp(expected, received, 32) && events == saved_events);
    page[2 + n + m - 1] ^= 1;
    assert(sqlite3_exec(target.topo_sqlite_db, "CREATE TRIGGER fail_answer BEFORE INSERT ON feedback_1001"
        " WHEN NEW.kind=2 BEGIN SELECT RAISE(ABORT,'injected feedback failure'); END", NULL, NULL, NULL) == SQLITE_OK);
    assert(fb_apply_page(&target, "1001", source.node_id, page, 2 + n + m) < 0);
    root(&target, received); assert(!memcmp(expected, received, 32) && events == saved_events);
    assert(sqlite3_exec(target.topo_sqlite_db, "DROP TRIGGER fail_answer", NULL, NULL, NULL) == SQLITE_OK);
    assert(fb_apply_page(&target, "1001", source.node_id, page, 2 + n + m - 1) < 0);
    assert(fb_apply_page(&target, "1001", source.node_id, page, 2 + n + m) == 0 && events == saved_events + 2);
    puts("PASS: malformed page, invalid signature and SQLite failure roll back the whole page");

    merkle_key_t key, cursor = {{0}}, next; assert(fb_key(1001, &newer, &key) == 0);
    size_t bytes = sizeof(page); int more;
    assert(fb_page(&target, "1001", merkle_sync_level_prefix(fb_read64(key.bytes), 5), 0,
        &cursor, page, &bytes, &next, &more) == 0 && !more);
    assert(bytes >= 2 + FB_FIXED_SIZE && page[1] >= 1);
    struct chat_feedback_record decoded; assert(fb_decode(page + 2, bytes - 2, &decoded) > 0);
    assert(decoded.ver == 5 && decoded.data[1] == 5);
    assert(chat_feedback_set(&target, "1001", message, CHAT_FEEDBACK_REACTION, NULL, 0, &ver) == 1 && ver == 1);
    assert(chat_feedback_set(&target, "1001", message, CHAT_FEEDBACK_REACTION, a, sizeof(a), &ver) == 1 && ver == 2);
    assert(chat_feedback_set(&target, "1001", message, CHAT_FEEDBACK_REACTION, NULL, 0, &ver) == 1 && ver == 3);
    root(&target, expected);
    member_sync_destroy(&target); assert(member_sync_init(&target) == 0 && chat_feedback_init(&target) == 0);
    root(&target, received); assert(!memcmp(expected, received, 32));
    assert(chat_feedback_set(&target, "1001", message, CHAT_FEEDBACK_REACTION, a, sizeof(a), &ver) == 1 && ver == 4);
    puts("PASS: wire roundtrip; persisted empty state and ver survive Merkle rebuild");

    assert(topo_node_sqlite_channel_delete(target.topo_sqlite_db, "1001") == 0);
    sqlite3_stmt* st;
    assert(sqlite3_prepare_v2(target.topo_sqlite_db, "SELECT 1 FROM sqlite_master WHERE name='feedback_1001'", -1, &st, NULL) == SQLITE_OK);
    assert(sqlite3_step(st) == SQLITE_DONE); sqlite3_finalize(st);
    assert(merkle_sync_read_hash(&target, MT_DATA_FEEDBACK, "1001", 0, 0, received) == 0);
    uint8_t empty[32] = {0}; assert(!memcmp(received, empty, 32));
    puts("PASS: deleting a channel removes its feedback table and derived root");
    membership_regressions(ua);
    member_sync_destroy(&source); member_sync_destroy(&target);
    assert(sqlite3_close(source.topo_sqlite_db) == SQLITE_OK && sqlite3_close(target.topo_sqlite_db) == SQLITE_OK);
    uasync_poll(ua, 0); uasync_destroy(ua, 0);
    assert(u_get_allocated_count() == baseline);
    puts("ALL PASS: signed feedback regressions, no tracked allocations leaked");
    return 0;
}