/*
 * android_jni_bridge.c — JNI bridge implementation
 *
 * C side of the bridge. Wires Kotlin ↔ uTun stack:
 * - nativeStart(configText) → instance_lite_start()
 * - nativeJoinChannel(chId, nodeId, pubkey, addrs) → chat_sync_connect_from_invite()
 * - Chat events → JNI callback → Kotlin
 */
#include "android_jni_bridge.h"
#include "android_udp_log.h"
#include "../libutun_lite/utun_config_api.h"
#include "../libutun_lite/invite_link_c.h"
#include "../libutun_lite/instance_lite.h"
#include "../libutun_lite/voice_recorder.h"
#include "../libutun_lite/attachment_sender.h"
#include "../../../lib/debug_config.h"
#include "../../../lib/u_async.h"
#include "../../../lib/mem.h"
#include "../../../lib/sqlite3.h"
#include "../../../src/chat/chat_core.h"
#include "../../../src/chat/chat_setting.h"
#include "../../../src/utun_instance.h"
#include "../../../src/transport_layer/etcp.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <unistd.h>

#ifdef __ANDROID__
#include <jni.h>
#include <android/log.h>
#define  LOG_TAG  "utun-bridge"
#else
#define ANDROID_LOG_VERBOSE 2
#define ANDROID_LOG_DEBUG   3
#define ANDROID_LOG_INFO    4
#define ANDROID_LOG_WARN    5
#define ANDROID_LOG_ERROR   6
#endif

enum { BLEV_TRACE = 0, BLEV_DEBUG = 1, BLEV_INFO = 2, BLEV_WARN = 3, BLEV_ERROR = 4 };

static int blevel_to_android(int blevel) {
    switch (blevel) {
        case BLEV_TRACE: return ANDROID_LOG_VERBOSE;
        case BLEV_DEBUG: return ANDROID_LOG_DEBUG;
        case BLEV_INFO:  return ANDROID_LOG_INFO;
        case BLEV_WARN:  return ANDROID_LOG_WARN;
        case BLEV_ERROR: return ANDROID_LOG_ERROR;
        default:         return ANDROID_LOG_VERBOSE;
    }
}

static utun_log_fn   g_on_log   = NULL;
static utun_event_fn g_on_event = NULL;

static char g_db_path[512];

static void bridge_log(int level, const char* fmt, ...) {
    va_list ap;
    va_start(ap, fmt);
#ifdef __ANDROID__
    __android_log_vprint(blevel_to_android(level), LOG_TAG, fmt, ap);
#else
    vfprintf(stderr, fmt, ap); fputc('\n', stderr);
#endif
    va_end(ap);

    if (g_on_log) {
        va_list ap2;
        char buf[512];
        va_start(ap2, fmt);
        vsnprintf(buf, sizeof(buf), fmt, ap2);
        va_end(ap2);
        const char* cat;
        switch (level) {
            case BLEV_TRACE: cat = "TRACE"; break;
            case BLEV_DEBUG: cat = "DEBUG"; break;
            case BLEV_INFO:  cat = "INFO";  break;
            case BLEV_WARN:  cat = "WARN";  break;
            case BLEV_ERROR: cat = "ERROR"; break;
            default:         cat = "?";     break;
        }
        g_on_log(level, cat, buf);
    }
}

static void bridge_debug_hook(int level, const char* category, const char* message) {
#ifdef __ANDROID__
    __android_log_print(blevel_to_android(level), LOG_TAG, "[%s] %s",
                        category ? category : "?", message ? message : "");
#else
    fprintf(stderr, "[%s] %s\n", category ? category : "?", message ? message : "");
#endif
    udp_log_write(message, (int)strlen(message));
    if (g_on_log) g_on_log(level, category, message);
}

static utun_config_string_fn  g_cfg_string  = NULL;
static utun_config_int64_fn   g_cfg_int64   = NULL;
static utun_config_int_fn     g_cfg_int     = NULL;

static const char* cfg_wrapper_string(const char* key, const char* def) {
    if (g_cfg_string) { const char* val = g_cfg_string(key); return val ? val : def; }
    return def;
}
static int64_t cfg_wrapper_int64(const char* key, int64_t def) {
    if (g_cfg_int64) return g_cfg_int64(key);
    return def;
}
static int cfg_wrapper_int(const char* key, int def) {
    if (g_cfg_int) return g_cfg_int(key);
    return def;
}

/* ── Public API ── */

void utun_bridge_log(int level, const char* category, const char* message) {
    if (g_on_log) g_on_log(level, category, message);
}

void utun_bridge_event(int event_type, const char* json_data) {
    if (g_on_event) g_on_event(event_type, json_data);
}

bool utun_bridge_init(const char* db_path, int control_port,
                       utun_log_fn on_log,
                       utun_event_fn on_event,
                       const struct utun_bridge_config* config) {
    g_on_log   = on_log;
    g_on_event = on_event;
    debug_set_log_hook(bridge_debug_hook);

    if (config) {
        g_cfg_string = config->get_string;
        g_cfg_int64  = config->get_int64;
        g_cfg_int    = config->get_int;
        utun_config_provider_t provider = {
            .get_string = cfg_wrapper_string,
            .get_int64  = cfg_wrapper_int64,
            .get_int    = cfg_wrapper_int,
            .get_bool   = NULL,
        };
        utun_config_set_provider(&provider);
    }

    bridge_log(BLEV_INFO, "bridge init: db=%s port=%d (stub, use nativeStart for real init)",
               db_path ? db_path : "(null)", control_port);
    voice_recorder_init(db_path);
    return true;
}

void utun_bridge_destroy(void) {
    voice_recorder_deinit();
    instance_lite_stop();
    g_on_log   = NULL;
    g_on_event = NULL;
    g_cfg_string = NULL;
    g_cfg_int64  = NULL;
    g_cfg_int    = NULL;
    bridge_log(BLEV_INFO, "bridge destroy");
}

int utun_bridge_start(const char* config_text) {
    bridge_log(BLEV_INFO, "bridge start: launching utun instance");
    int rc = instance_lite_start(config_text);
    if (rc != 0) {
        bridge_log(BLEV_ERROR, "bridge start: instance_lite_start failed rc=%d", rc);
    } else {
        bridge_log(BLEV_INFO, "bridge start: instance thread created");
    }
    return rc;
}

void utun_bridge_poll(void) {
}

void utun_bridge_send_message(const char* channel_id, const char* text) {
    bridge_log(BLEV_DEBUG, "send ch=%s text=%s", channel_id ? channel_id : "", text ? text : "");
    if (!channel_id || !text) return;

    struct UASYNC* ua = instance_lite_get_uasync();
    if (!ua) { bridge_log(BLEV_ERROR, "send: ua not ready"); return; }

    size_t datalen = strlen(text);
    struct chat_msg_submit* req = u_calloc(1, sizeof(struct chat_msg_submit) + datalen);
    if (!req) return;

    strncpy(req->channel_id, channel_id, sizeof(req->channel_id) - 1);
    strncpy(req->content_type, "text/plain", sizeof(req->content_type) - 1);
    req->data = (uint8_t*)(req + 1);
    req->data_len = (uint32_t)datalen;
    memcpy(req->data, text, datalen);
    req->timestamp = 0;

    uasync_post(ua, chat_core_submit_trampoline, req);
    bridge_log(BLEV_DEBUG, "send queued ch=%s len=%zu", channel_id, datalen);
}

void utun_bridge_create_channel(const char* name, const char* channel_id) {
    bridge_log(BLEV_INFO, "create_channel name=%s id=%s", name ? name : "", channel_id ? channel_id : "");
}

void utun_bridge_connect_node(const char* address, int port, const char* pubkey_hex) {
    bridge_log(BLEV_INFO, "connect %s:%d pubkey=%s", address ? address : "", port, pubkey_hex ? pubkey_hex : "");
}

/* Real implementation: calls chat_sync_connect_from_invite() */
#include "chat/chat_sync.h"
#include "chat/chat_core.h"

void utun_bridge_join_channel(uint64_t channel_id, uint64_t node_id,
                                const uint8_t* pubkey_bin,
                                const uint8_t* addrs_data, int addr_count) {
    bridge_log(BLEV_INFO, "join ch=%llu node=0x%016llx addrs=%d",
               (unsigned long long)channel_id, (unsigned long long)node_id, addr_count);
    if (!pubkey_bin || !addrs_data || addr_count <= 0) {
        bridge_log(BLEV_ERROR, "join invalid args");
        utun_bridge_event(6, "{\"node_id\":0,\"result\":-7}");  /* CHAT_EVT_CONNECT_RESULT */
        return;
    }
    chat_sync_connect_from_invite(channel_id, node_id, pubkey_bin, addrs_data, addr_count);
}

void utun_bridge_connect_channel(const char* channel_id) {
    if (!channel_id || !channel_id[0]) {
        bridge_log(BLEV_ERROR, "connect_channel: null ch_id");
        return;
    }
    struct UASYNC* ua = instance_lite_get_uasync();
    if (!ua) {
        bridge_log(BLEV_ERROR, "connect_channel: ua not ready, ch=%s", channel_id);
        return;
    }
    char* cid = u_strdup(channel_id);
    if (!cid) return;
    bridge_log(BLEV_INFO, "connect_channel ch=%s", channel_id);
    uasync_post(ua, chat_core_connect_channel_trampoline, cid);
}

#include "chat/chat_core_priv.h"

static char* json_escape_alloc(const char* str) {
    if (!str) return u_strdup("");
    size_t len = strlen(str), cap = len * 2 + 8;
    char* out = u_malloc(cap);
    if (!out) return u_strdup("");
    size_t pos = 0;
    for (size_t i = 0; i < len && pos < cap - 2; i++) {
        char c = str[i];
        if (c == '"' || c == '\\')     { out[pos++] = '\\'; out[pos++] = c; }
        else if (c == '\n')            { out[pos++] = '\\'; out[pos++] = 'n'; }
        else if (c == '\r')            { out[pos++] = '\\'; out[pos++] = 'r'; }
        else if (c == '\t')            { out[pos++] = '\\'; out[pos++] = 't'; }
        else if ((unsigned char)c < 32) { pos += snprintf(out + pos, cap - pos, "\\u%04x", (unsigned char)c); }
        else                           out[pos++] = c;
    }
    out[pos] = '\0';
    return out;
}

static void bridge_get_node_name(sqlite3* db, uint64_t node_id, char* out, size_t sz) {
    out[0] = '\0';
    if (!db || node_id == 0) return;
    sqlite3_stmt* st = NULL;
    if (sqlite3_prepare_v2(db, "SELECT name FROM nodes WHERE node_id=?", -1, &st, NULL) != SQLITE_OK) return;
    sqlite3_bind_int64(st, 1, (sqlite3_int64)node_id);
    if (sqlite3_step(st) == SQLITE_ROW) {
        const char* n = (const char*)sqlite3_column_text(st, 0);
        if (n && n[0]) snprintf(out, sz, "%s", n);
    }
    sqlite3_finalize(st);
}

char* utun_bridge_get_channels_json(void) {
    sqlite3* db = chat_core_get_db();
    if (!chat_core_is_initialized() || !db) {
        bridge_log(BLEV_WARN, "get_channels: not initialized db=%p initialized=%d",
                   (void*)db, chat_core_is_initialized());
        return strdup("[]");
    }
    size_t cap = 4096, pos = 1;
    char* json = u_malloc(cap);
    if (!json) return strdup("[]");
    json[0] = '[';

    sqlite3_stmt* st = NULL;
    int rc = sqlite3_prepare_v2(db, "SELECT channel_id, name, last_msg_at FROM channels ORDER BY last_msg_at DESC, name ASC", -1, &st, NULL);
    if (rc != SQLITE_OK) { u_free(json); return strdup("[]"); }

    int first = 1;
    while (sqlite3_step(st) == SQLITE_ROW) {
        const char* ch_id   = (const char*)sqlite3_column_text(st, 0);
        const char* name    = (const char*)sqlite3_column_text(st, 1);
        int64_t last_msg_at = sqlite3_column_int64(st, 2);
        if (!ch_id) continue;

        char tbl_msg[80], tbl_peers[80], last_msg[128];
        msg_table_name(ch_id, tbl_msg, sizeof(tbl_msg));
        peers_table_name(ch_id, tbl_peers, sizeof(tbl_peers));
        last_msg[0] = '\0';

        sqlite3_stmt* lm = NULL;
        char sql[256];
        snprintf(sql, sizeof(sql), "SELECT node_id, data FROM \"%s\" ORDER BY id DESC LIMIT 1", tbl_msg);
        if (sqlite3_prepare_v2(db, sql, -1, &lm, NULL) == SQLITE_OK) {
            if (sqlite3_step(lm) == SQLITE_ROW) {
                int64_t author = sqlite3_column_int64(lm, 0);
                const uint8_t* dptr = sqlite3_column_blob(lm, 1);
                int dlen = sqlite3_column_bytes(lm, 1);
                char txt[128] = "";
                if (dptr && dlen > 0) {
                    const char* dp = (const char*)dptr;
                    const char* ds = strstr(dp, "\"d\":\"");
                    if (ds) { ds += 5; char* de = strchr((char*)ds, '"'); if (de) { size_t tl = (size_t)(de - ds); if (tl > 120) tl = 120; memcpy(txt, ds, tl); txt[tl] = '\0'; } }
                }
                char author_name[128];
                bridge_get_node_name(db, (uint64_t)author, author_name, sizeof(author_name));
                if (!author_name[0])
                    snprintf(author_name, sizeof(author_name), "0x%016llx", (unsigned long long)author);
                snprintf(last_msg, sizeof(last_msg), "%s: %s", author_name, txt);
            }
            sqlite3_finalize(lm);
        }

        int online = 0;
        uint64_t my_id = g_cc.my_node_id;
        struct UTUN_INSTANCE* inst = chat_core_get_inst();
        sqlite3_stmt* pc = NULL;
        snprintf(sql, sizeof(sql), "SELECT DISTINCT node_id FROM \"%s\"", tbl_peers);
        if (sqlite3_prepare_v2(db, sql, -1, &pc, NULL) == SQLITE_OK) {
            while (sqlite3_step(pc) == SQLITE_ROW) {
                uint64_t nid = (uint64_t)sqlite3_column_int64(pc, 0);
                if (nid == my_id) continue;
                if (inst) { struct ETCP_CONN* c = instance_find_conn(inst, nid); if (c && c->initialized && c->links_up) online++; }
                else online++;
            }
            sqlite3_finalize(pc);
        }

        char* esc_name  = json_escape_alloc(name ? name : ch_id);
        char* esc_msg   = json_escape_alloc(last_msg);
        const char* sep = first ? "" : ",";
        first = 0;

        size_t needed = snprintf(NULL, 0, "%s{\"id\":\"%s\",\"name\":\"%s\",\"lastMsgAt\":%lld,\"lastMsg\":\"%s\",\"peersOnline\":%d}",
                                 sep, ch_id, esc_name, (long long)last_msg_at, esc_msg, online);
        while (pos + needed + 2 > cap) { cap *= 2; char* tmp = u_realloc(json, cap); if (!tmp) break; json = tmp; }
        if (pos + needed + 2 <= cap)
            pos += (size_t)snprintf(json + pos, cap - pos, "%s{\"id\":\"%s\",\"name\":\"%s\",\"lastMsgAt\":%lld,\"lastMsg\":\"%s\",\"peersOnline\":%d}",
                                    sep, ch_id, esc_name, (long long)last_msg_at, esc_msg, online);
        u_free(esc_msg);
        u_free(esc_name);
    }
    sqlite3_finalize(st);

    json[pos++] = ']'; json[pos] = '\0';
    return json;
}

char* utun_bridge_get_messages_json(const char* channel_id, int limit) {
    sqlite3* db = chat_core_get_db();
    if (!chat_core_is_initialized() || !db || !channel_id || !channel_id[0]) return strdup("[]");
    uint64_t my_id = g_cc.my_node_id;

    char tbl_msg[80];
    msg_table_name(channel_id, tbl_msg, sizeof(tbl_msg));

    char sql[256];
    snprintf(sql, sizeof(sql), "SELECT id, node_id, data, timestamp, local_attrs FROM \"%s\" ORDER BY timestamp ASC LIMIT %d", tbl_msg, limit);

    sqlite3_stmt* st = NULL;
    if (sqlite3_prepare_v2(db, sql, -1, &st, NULL) != SQLITE_OK) return strdup("[]");

    size_t cap = 4096, pos = 1;
    char* json = u_malloc(cap);
    if (!json) { sqlite3_finalize(st); return strdup("[]"); }
    json[0] = '[';

    int first = 1;
    while (sqlite3_step(st) == SQLITE_ROW) {
        int64_t msg_id   = sqlite3_column_int64(st, 0);
        int64_t node_id  = sqlite3_column_int64(st, 1);
        int64_t ts       = sqlite3_column_int64(st, 3);
        const uint8_t* dptr = sqlite3_column_blob(st, 2);
        int dlen = sqlite3_column_bytes(st, 2);
        const char* lattr = (const char*)sqlite3_column_text(st, 4);

        char txt[2048] = "", ct[64] = "text/plain";
        if (dptr && dlen > 0) {
            const char* ds = strstr((const char*)dptr, "\"d\":\"");
            if (ds) { ds += 5; char* de = strchr((char*)ds, '"'); if (de) { size_t tl = (size_t)(de - ds); if (tl > 2000) tl = 2000; memcpy(txt, ds, tl); txt[tl] = '\0'; } }
            const char* cts = strstr((const char*)dptr, "\"ct\":\"");
            if (cts) { cts += 6; char* cte = strchr((char*)cts, '"'); if (cte) { size_t tlc = (size_t)(cte - cts); if (tlc < sizeof(ct)) { memcpy(ct, cts, tlc); ct[tlc] = '\0'; } } }
        }
        char* esc_txt = json_escape_alloc(txt);
        char* esc_ct  = json_escape_alloc(ct);
        int is_out = (node_id == (int64_t)my_id) ? 1 : 0;
        const char* sep = first ? "" : ",";
        first = 0;

        char author_name[128];
        bridge_get_node_name(db, (uint64_t)node_id, author_name, sizeof(author_name));
        if (!author_name[0])
            snprintf(author_name, sizeof(author_name), "0x%016llx", (unsigned long long)node_id);

        /* build filePath for voice/attachment messages */
        char file_path[1024] = "";
        if (lattr) {
            const char* fps = strstr(lattr, "\"fp\":\"");
            if (fps) { fps += 6;
                char* fpe = strchr((char*)fps, '"');
                if (fpe) { size_t fpl = (size_t)(fpe - fps);
                    snprintf(file_path, sizeof(file_path), "%s/media/%s/%.*s",
                             g_db_path, channel_id, (int)fpl, fps);
                }
            }
        }
        char* esc_fp = file_path[0] ? json_escape_alloc(file_path) : NULL;
        char* esc_la = lattr && lattr[0] ? json_escape_alloc(lattr) : NULL;

        size_t needed = snprintf(NULL, 0, "%s{\"id\":%lld,\"author\":\"%s\",\"text\":\"%s\",\"ts\":%lld,\"isOutgoing\":%s,\"contentType\":\"%s\"%s%s%s%s%s%s}",
                                 sep, (long long)msg_id, author_name, esc_txt, (long long)ts, is_out ? "true" : "false", esc_ct,
                                 esc_fp ? ",\"filePath\":\"" : "", esc_fp ? esc_fp : "", esc_fp ? "\"" : "",
                                 esc_la ? ",\"localAttrs\":\"" : "", esc_la ? esc_la : "", esc_la ? "\"" : "");
        while (pos + needed + 2 > cap) { cap *= 2; char* tmp = u_realloc(json, cap); if (!tmp) break; json = tmp; }
        if (pos + needed + 2 <= cap)
            pos += (size_t)snprintf(json + pos, cap - pos, "%s{\"id\":%lld,\"author\":\"%s\",\"text\":\"%s\",\"ts\":%lld,\"isOutgoing\":%s,\"contentType\":\"%s\"%s%s%s%s%s%s}",
                                    sep, (long long)msg_id, author_name, esc_txt, (long long)ts, is_out ? "true" : "false", esc_ct,
                                    esc_fp ? ",\"filePath\":\"" : "", esc_fp ? esc_fp : "", esc_fp ? "\"" : "",
                                    esc_la ? ",\"localAttrs\":\"" : "", esc_la ? esc_la : "", esc_la ? "\"" : "");
        if (esc_la) u_free(esc_la);
        if (esc_fp) u_free(esc_fp);
        u_free(esc_ct);
        u_free(esc_txt);
    }
    sqlite3_finalize(st);

    json[pos++] = ']'; json[pos] = '\0';
    return json;
}

uint64_t utun_bridge_get_my_node_id(void) {
    return chat_core_is_initialized() ? g_cc.my_node_id : 0;
}

void utun_bridge_set_debug_level(const char* category, const char* level) {
    bridge_log(BLEV_INFO, "debug %s=%s", category ? category : "all", level ? level : "info");
}

void utun_bridge_chat_setting_set(const char* name, const char* value) {
    chat_setting_set(name, value);
}

int utun_bridge_chat_setting_get_int(const char* name, int def) {
    return chat_setting_get_int(name, def);
}

void utun_bridge_restart(const char* config_text) {
    bridge_log(BLEV_INFO, "bridge restart: posting to instance");
    instance_lite_restart(config_text);
}

void utun_bridge_ping(void) {
    instance_lite_ping();
}

int utun_bridge_is_responsive(void) {
    return instance_lite_is_responsive();
}

/* ──────────────────────────────────────────────────────────────────
 * Voice recording
 * ────────────────────────────────────────────────────────────────── */

int utun_bridge_voice_start(const char* channel_id) {
    return voice_recorder_start(channel_id, 48000, 1);
}

int utun_bridge_voice_feed(const int16_t* samples, int count) {
    return voice_recorder_feed(samples, count);
}

int utun_bridge_voice_stop(int* out_duration_ms) {
    return voice_recorder_stop(out_duration_ms);
}

void utun_bridge_voice_cancel(void) {
    voice_recorder_cancel();
}

int utun_bridge_voice_is_active(void) {
    return voice_recorder_is_active();
}

void utun_bridge_voice_set_preset(int preset) {
    voice_recorder_set_preset(preset);
}

int utun_bridge_voice_get_preset(void) {
    return voice_recorder_get_preset();
}

void utun_bridge_voice_set_compressor(int enabled) {
    voice_recorder_set_compressor_enabled(enabled);
}

int utun_bridge_voice_get_compressor(void) {
    return voice_recorder_is_compressor_enabled();
}

void utun_bridge_voice_set_compressor_config(int max_gain_db, int lookback_ms, int lookahead_ms,
                                              float rise_rate_per_sec, float target_level_db) {
    voice_recorder_set_compressor_config(max_gain_db, lookback_ms, lookahead_ms, rise_rate_per_sec, target_level_db);
}

float utun_bridge_voice_get_peak_level(void) {
    return voice_recorder_get_peak_level();
}

int utun_bridge_attachment_send(const char* channel_id, const char* file_path, const char* db_path) {
    return attachment_send(channel_id, file_path, db_path);
}

int utun_bridge_attachment_download(const char* channel_id, int64_t msg_id) {
    if (!channel_id || msg_id <= 0) { bridge_log(BLEV_ERROR, "attachment_download: invalid args"); return -1; }
    struct UASYNC* ua = instance_lite_get_uasync();
    if (!ua) { bridge_log(BLEV_ERROR, "attachment_download: no uasync"); return -1; }
    struct attachment_dl_req* req = u_calloc(1, sizeof(*req));
    if (!req) return -1;
    snprintf(req->channel_id, sizeof(req->channel_id), "%s", channel_id);
    req->msg_id = msg_id;
    bridge_log(BLEV_INFO, "attachment_download: ch=%s msg_id=%lld", channel_id, (long long)msg_id);
    uasync_post(ua, chat_core_attachment_download_trampoline, req);
    return 0;
}

/* ──────────────────────────────────────────────────────────────────
 * Voice playback (Opus decode)
 * ────────────────────────────────────────────────────────────────── */

#include "../../../lib/opus_codec.h"

struct voice_decode_handle {
    opus_codec_decoder_t* dec;
    FILE* file;
    int sample_rate;
    int channels;
    int frame_samples;
    int total_samples;
    int pcm_consumed;
};

#define OPUS_MAGIC_D  0x5355504F

void* utun_bridge_voice_decode_open(const char* file_path,
                                     int* out_sample_rate, int* out_channels,
                                     int* out_total_samples) {
    if (!file_path || !out_sample_rate || !out_channels || !out_total_samples) return NULL;

    FILE* f = fopen(file_path, "rb");
    if (!f) { DEBUG_ERROR(DEBUG_CATEGORY_GENERAL, "voice_decode: cannot open %s", file_path); return NULL; }

    uint32_t magic = 0; uint32_t sr = 0; uint16_t ch = 0, fs = 0;
    if (fread(&magic, 4, 1, f) != 1 || magic != OPUS_MAGIC_D) { DEBUG_ERROR(DEBUG_CATEGORY_GENERAL, "voice_decode: bad magic"); fclose(f); return NULL; }
    if (fread(&sr, 4, 1, f) != 1) { fclose(f); return NULL; }
    if (fread(&ch, 2, 1, f) != 1) { fclose(f); return NULL; }
    if (fread(&fs, 2, 1, f) != 1) { fclose(f); return NULL; }

    opus_codec_decoder_t* dec = opus_codec_decoder_create((int)sr, (int)ch);
    if (!dec) { fclose(f); return NULL; }

    struct voice_decode_handle* h = u_calloc(1, sizeof(*h));
    if (!h) { opus_codec_decoder_destroy(dec); fclose(f); return NULL; }

    h->dec = dec; h->file = f;
    h->sample_rate = (int)sr; h->channels = (int)ch; h->frame_samples = (int)fs;

    /* count total frames/samples */
    long pos = ftell(f);
    h->total_samples = 0;
    for (;;) {
        uint16_t plen;
        if (fread(&plen, 2, 1, f) != 1 || plen == 0) break;
        fseek(f, plen, SEEK_CUR);
        h->total_samples += (int)fs * (int)ch;
    }
    fseek(f, pos, SEEK_SET);

    *out_sample_rate = h->sample_rate;
    *out_channels = h->channels;
    *out_total_samples = h->total_samples;

    DEBUG_INFO(DEBUG_CATEGORY_GENERAL, "voice_decode_open: %s rate=%d ch=%d fs=%d total=%d",
               file_path, h->sample_rate, h->channels, h->frame_samples, h->total_samples);
    return h;
}

int utun_bridge_voice_decode_read(void* handle, int16_t* buf, int max_samples) {
    struct voice_decode_handle* h = (struct voice_decode_handle*)handle;
    if (!h || !buf || max_samples <= 0) return -1;
    if (h->pcm_consumed >= h->total_samples) return 0;

    uint8_t packet[4096];
    int written = 0;

    while (written + h->frame_samples * h->channels <= max_samples) {
        uint16_t plen;
        if (fread(&plen, 2, 1, h->file) != 1 || plen == 0) break;
        if (plen > sizeof(packet)) { fseek(h->file, plen, SEEK_CUR); break; }
        if (fread(packet, 1, plen, h->file) != plen) break;

        int decoded = opus_codec_decode(h->dec, packet, plen, buf + written, h->frame_samples);
        if (decoded < 0) { DEBUG_WARN(DEBUG_CATEGORY_GENERAL, "voice_decode_read: error %d", decoded); break; }
        written += decoded * h->channels;
    }
    h->pcm_consumed += written;
    return written;
}

void utun_bridge_voice_decode_close(void* handle) {
    if (!handle) return;
    struct voice_decode_handle* h = (struct voice_decode_handle*)handle;
    if (h->dec) opus_codec_decoder_destroy(h->dec);
    if (h->file) fclose(h->file);
    u_free(h);
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "voice_decode_close");
}

/* ──────────────────────────────────────────────────────────────────
 * JNI functions (compiled only for Android via NDK)
 * ────────────────────────────────────────────────────────────────── */

#ifdef __ANDROID__

static JavaVM* g_jvm = NULL;
static jobject g_config_callback = NULL;
static jobject g_log_callback = NULL;
static jobject g_event_callback = NULL;
static jmethodID g_event_mid = NULL;

JNIEXPORT jint JNICALL JNI_OnLoad(JavaVM* vm, void* reserved) {
    (void)reserved;
    g_jvm = vm;
    return JNI_VERSION_1_6;
}

/* ── JNI log callback → LogManager.onNativeLog() ── */

static void jni_on_log(int level, const char* category, const char* message) {
    if (!g_jvm || !g_log_callback || !category || !message) return;
    JNIEnv* env = NULL;
    int attached = 0;
    jint res = (*g_jvm)->GetEnv(g_jvm, (void**)&env, JNI_VERSION_1_6);
    if (res == JNI_EDETACHED) {
        if ((*g_jvm)->AttachCurrentThread(g_jvm, &env, NULL) != JNI_OK) return;
        attached = 1;
    } else if (res != JNI_OK) {
        return;
    }
    jclass cls = (*env)->GetObjectClass(env, g_log_callback);
    jmethodID mid = (*env)->GetMethodID(env, cls, "onNativeLog", "(ILjava/lang/String;Ljava/lang/String;)V");
    if (!mid) { if (attached) (*g_jvm)->DetachCurrentThread(g_jvm); return; }
    jstring jcat = (*env)->NewStringUTF(env, category);
    jstring jmsg = (*env)->NewStringUTF(env, message);
    (*env)->CallVoidMethod(env, g_log_callback, mid, level, jcat, jmsg);
    (*env)->DeleteLocalRef(env, jmsg);
    (*env)->DeleteLocalRef(env, jcat);
    if (attached) (*g_jvm)->DetachCurrentThread(g_jvm);
}

/* ── JNI event callback (chat_event → Kotlin) ── */

static void jni_on_event(int type, const uint8_t* data, int len) {
    if (!g_jvm || !g_event_callback || !g_event_mid) return;
    JNIEnv* env = NULL;
    int attached = 0;
    jint res = (*g_jvm)->GetEnv(g_jvm, (void**)&env, JNI_VERSION_1_6);
    if (res == JNI_EDETACHED) {
        if ((*g_jvm)->AttachCurrentThread(g_jvm, &env, NULL) != JNI_OK) return;
        attached = 1;
    } else if (res != JNI_OK) {
        return;
    }
    jbyteArray jdata = NULL;
    if (data && len > 0) {
        jdata = (*env)->NewByteArray(env, len);
        if (jdata) (*env)->SetByteArrayRegion(env, jdata, 0, len, (const jbyte*)data);
    }
    (*env)->CallVoidMethod(env, g_event_callback, g_event_mid, (jint)type, jdata);
    if (jdata) (*env)->DeleteLocalRef(env, jdata);
    if (attached) (*g_jvm)->DetachCurrentThread(g_jvm);
}

static void instance_event_handler(int type, const uint8_t* data, int len) {
    bridge_log(BLEV_DEBUG, "event type=%d len=%d", type, len);
    jni_on_event(type, data, len);
}

static jstring jni_get_string_callback(JNIEnv* env, const char* key) {
    if (!g_config_callback) return NULL;
    jclass cls = (*env)->GetObjectClass(env, g_config_callback);
    jmethodID mid = (*env)->GetMethodID(env, cls, "getString", "(Ljava/lang/String;)Ljava/lang/String;");
    if (!mid) return NULL;
    jstring jkey = (*env)->NewStringUTF(env, key);
    jstring result = (jstring)(*env)->CallObjectMethod(env, g_config_callback, mid, jkey);
    (*env)->DeleteLocalRef(env, jkey);
    return result;
}

static const char* jni_cfg_get_string(const char* key) {
    JNIEnv* env = NULL;
    if (!g_jvm || (*g_jvm)->GetEnv(g_jvm, (void**)&env, JNI_VERSION_1_6) != JNI_OK)
        return NULL;
    jstring js = jni_get_string_callback(env, key);
    if (!js) return NULL;
    const char* result = (*env)->GetStringUTFChars(env, js, NULL);
    static char buf[256];
    snprintf(buf, sizeof(buf), "%s", result ? result : "");
    if (result) (*env)->ReleaseStringUTFChars(env, js, result);
    (*env)->DeleteLocalRef(env, js);
    return buf[0] ? buf : NULL;
}

static int64_t jni_cfg_get_int64(const char* key) {
    const char* s = jni_cfg_get_string(key);
    return s ? (int64_t)atoll(s) : 0;
}

static int jni_cfg_get_int(const char* key) {
    const char* s = jni_cfg_get_string(key);
    return s ? atoi(s) : 0;
}

/* ── nativeStart(configText) — real uTun instance launch ── */

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeStart(
    JNIEnv* env, jobject thiz, jstring configText) {
    (void)thiz;
    if (!configText) {
        bridge_log(BLEV_ERROR, "nativeStart: null config");
        return JNI_FALSE;
    }
    const char* cfg = (*env)->GetStringUTFChars(env, configText, NULL);
    if (!cfg) return JNI_FALSE;

    /* Set up event forwarder (bridge config/log are set by nativeInit) */
    instance_lite_set_event_handler(instance_event_handler);

    int rc = utun_bridge_start(cfg);
    (*env)->ReleaseStringUTFChars(env, configText, cfg);
    return (rc >= 0) ? JNI_TRUE : JNI_FALSE;
}

/* ── nativeStop() ── */

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeStop(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    utun_bridge_destroy();
    udp_log_stop();
}

/* ── nativeInit (legacy, just saves callbacks) ── */

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeInit(
    JNIEnv* env, jobject thiz, jstring dbPath, jint controlPort,
    jobject configCallback, jobject logCb) {
    (void)thiz;

    if (g_config_callback) (*env)->DeleteGlobalRef(env, g_config_callback);
    g_config_callback = configCallback ? (*env)->NewGlobalRef(env, configCallback) : NULL;

    if (g_log_callback) (*env)->DeleteGlobalRef(env, g_log_callback);
    g_log_callback = logCb ? (*env)->NewGlobalRef(env, logCb) : NULL;

    const char* db = dbPath ? (*env)->GetStringUTFChars(env, dbPath, NULL) : NULL;
    if (db) { strncpy(g_db_path, db, sizeof(g_db_path) - 1); g_db_path[sizeof(g_db_path) - 1] = '\0'; }

    /* Create empty DB file synchronously so ChatRepository (read-only) can open it immediately */
    if (g_db_path[0]) {
        char db_file[512]; snprintf(db_file, sizeof(db_file), "%s/chats.db", g_db_path);
        sqlite3* js3; if (sqlite3_open_v2(db_file, &js3, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL) == SQLITE_OK)
            sqlite3_close(js3);
    }

    utun_log_fn log_cb = g_log_callback ? jni_on_log : NULL;

    struct utun_bridge_config cfg = {
        .get_string = jni_cfg_get_string,
        .get_int    = jni_cfg_get_int,
    };

    bool ok = utun_bridge_init(db, (int)controlPort, log_cb, NULL, &cfg);
    if (db) (*env)->ReleaseStringUTFChars(env, dbPath, db);
    return ok ? JNI_TRUE : JNI_FALSE;
}

/* ── nativeJoinChannel ── */

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeJoinChannel(
    JNIEnv* env, jobject thiz, jlong channelId, jlong nodeId,
    jbyteArray pubkey, jbyteArray addrsData, jint addrCount) {
    (void)thiz;
    if (!pubkey || !addrsData) {
        bridge_log(BLEV_ERROR, "nativeJoinChannel null args");
        return;
    }
    jsize pk_len = (*env)->GetArrayLength(env, pubkey);
    jsize ad_len = (*env)->GetArrayLength(env, addrsData);
    if (pk_len < 32 || ad_len <= 0) {
        bridge_log(BLEV_ERROR, "nativeJoinChannel bad sizes pk=%d ad=%d", (int)pk_len, (int)ad_len);
        return;
    }
    uint8_t* pk = (uint8_t*)(*env)->GetByteArrayElements(env, pubkey, NULL);
    uint8_t* ad = (uint8_t*)(*env)->GetByteArrayElements(env, addrsData, NULL);
    bridge_log(BLEV_DEBUG, "nativeJoinChannel ch=%lld node=0x%llx pk=%02x%02x... addrs_sz=%d",
               (long long)channelId, (unsigned long long)nodeId, pk[0], pk[1], (int)ad_len);
    utun_bridge_join_channel((uint64_t)channelId, (uint64_t)nodeId, pk, ad, (int)addrCount);
    (*env)->ReleaseByteArrayElements(env, addrsData, (jbyte*)ad, JNI_ABORT);
    (*env)->ReleaseByteArrayElements(env, pubkey, (jbyte*)pk, JNI_ABORT);
}

/* ── nativeSetEventCallback(eventCb) ── */

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeSetEventCallback(
    JNIEnv* env, jobject thiz, jobject callback) {
    (void)thiz;
    if (g_event_callback) (*env)->DeleteGlobalRef(env, g_event_callback);
    g_event_callback = callback ? (*env)->NewGlobalRef(env, callback) : NULL;
    if (g_event_callback) {
        jclass cls = (*env)->GetObjectClass(env, g_event_callback);
        g_event_mid = (*env)->GetMethodID(env, cls, "onEvent", "(I[B)V");
        if (!g_event_mid) bridge_log(BLEV_ERROR, "onEvent method not found on callback");
    } else {
        g_event_mid = NULL;
    }
}

/* ── Pass-through JNI wrappers (unchanged from before) ── */

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeDestroy(
    JNIEnv* env, jobject thiz) {
    (void)thiz;
    udp_log_cancel_timer();
    utun_bridge_destroy();
    udp_log_stop();
    if (g_config_callback) { (*env)->DeleteGlobalRef(env, g_config_callback); g_config_callback = NULL; }
    if (g_log_callback) { (*env)->DeleteGlobalRef(env, g_log_callback); g_log_callback = NULL; }
    if (g_event_callback) { (*env)->DeleteGlobalRef(env, g_event_callback); g_event_callback = NULL; }
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeSendMessage(
    JNIEnv* env, jobject thiz, jstring channelId, jstring text) {
    (void)thiz;
    const char* ch = (*env)->GetStringUTFChars(env, channelId, NULL);
    const char* tx = (*env)->GetStringUTFChars(env, text, NULL);
    utun_bridge_send_message(ch, tx);
    if (tx) (*env)->ReleaseStringUTFChars(env, text, tx);
    if (ch) (*env)->ReleaseStringUTFChars(env, channelId, ch);
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeCreateChannel(
    JNIEnv* env, jobject thiz, jstring name, jstring channelId) {
    (void)thiz;
    const char* n = (*env)->GetStringUTFChars(env, name, NULL);
    const char* c = (*env)->GetStringUTFChars(env, channelId, NULL);
    utun_bridge_create_channel(n, c);
    if (c) (*env)->ReleaseStringUTFChars(env, channelId, c);
    if (n) (*env)->ReleaseStringUTFChars(env, name, n);
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeConnectNode(
    JNIEnv* env, jobject thiz, jstring address, jint port, jstring pubkeyHex) {
    (void)thiz;
    const char* a = (*env)->GetStringUTFChars(env, address, NULL);
    const char* p = (*env)->GetStringUTFChars(env, pubkeyHex, NULL);
    utun_bridge_connect_node(a, (int)port, p);
    if (p) (*env)->ReleaseStringUTFChars(env, pubkeyHex, p);
    if (a) (*env)->ReleaseStringUTFChars(env, address, a);
}

JNIEXPORT jstring JNICALL Java_com_utun_chat_data_NativeLib_nativeGetChannels(
    JNIEnv* env, jobject thiz) {
    (void)thiz;
    char* json = utun_bridge_get_channels_json();
    jstring result = (*env)->NewStringUTF(env, json);
    u_free(json);
    return result;
}

JNIEXPORT jstring JNICALL Java_com_utun_chat_data_NativeLib_nativeGetMessages(
    JNIEnv* env, jobject thiz, jstring channelId, jint limit) {
    (void)thiz;
    const char* ch = (*env)->GetStringUTFChars(env, channelId, NULL);
    char* json = utun_bridge_get_messages_json(ch, (int)limit);
    jstring result = (*env)->NewStringUTF(env, json);
    u_free(json);
    (*env)->ReleaseStringUTFChars(env, channelId, ch);
    return result;
}

JNIEXPORT jlong JNICALL Java_com_utun_chat_data_NativeLib_nativeGetMyNodeId(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    return (jlong)utun_bridge_get_my_node_id();
}

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeRestart(
    JNIEnv* env, jobject thiz, jstring configText) {
    (void)thiz;
    if (!configText) return JNI_FALSE;
    const char* cfg = (*env)->GetStringUTFChars(env, configText, NULL);
    if (!cfg) return JNI_FALSE;
    utun_bridge_restart(cfg);
    (*env)->ReleaseStringUTFChars(env, configText, cfg);
    return JNI_TRUE;
}

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeIsResponsive(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    return utun_bridge_is_responsive() ? JNI_TRUE : JNI_FALSE;
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativePing(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    utun_bridge_ping();
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeConnectChannel(
    JNIEnv* env, jobject thiz, jstring channelId) {
    (void)thiz;
    const char* ch = (*env)->GetStringUTFChars(env, channelId, NULL);
    utun_bridge_connect_channel(ch);
    if (ch) (*env)->ReleaseStringUTFChars(env, channelId, ch);
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeSetDebugLevel(
    JNIEnv* env, jobject thiz, jstring category, jstring level) {
    (void)thiz;
    const char* c = (*env)->GetStringUTFChars(env, category, NULL);
    const char* l = (*env)->GetStringUTFChars(env, level, NULL);
    utun_bridge_set_debug_level(c, l);
    if (l) (*env)->ReleaseStringUTFChars(env, level, l);
    if (c) (*env)->ReleaseStringUTFChars(env, category, c);
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeSetChatSetting(
    JNIEnv* env, jobject thiz, jstring name, jstring value) {
    (void)thiz;
    const char* n = (*env)->GetStringUTFChars(env, name, NULL);
    const char* v = (*env)->GetStringUTFChars(env, value, NULL);
    chat_setting_set(n, v);
    if (v) (*env)->ReleaseStringUTFChars(env, value, v);
    if (n) (*env)->ReleaseStringUTFChars(env, name, n);
}

JNIEXPORT jint JNICALL Java_com_utun_chat_data_NativeLib_nativeGetChatSettingInt(
    JNIEnv* env, jobject thiz, jstring name, jint def) {
    (void)thiz;
    const char* n = (*env)->GetStringUTFChars(env, name, NULL);
    int val = chat_setting_get_int(n, (int)def);
    if (n) (*env)->ReleaseStringUTFChars(env, name, n);
    return (jint)val;
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeSubscribeLogs(
    JNIEnv* env, jobject thiz, jboolean enabled) {
    (void)thiz; (void)env;
    g_on_log = (enabled && g_log_callback) ? jni_on_log : NULL;
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeSetUdpLogTarget(
    JNIEnv* env, jobject thiz, jstring ip, jint port) {
    (void)thiz;
    const char* ip_str = (*env)->GetStringUTFChars(env, ip, NULL);
    udp_log_set_target(ip_str, (int)port);
    (*env)->ReleaseStringUTFChars(env, ip, ip_str);
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeRegenerateKeys(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    instance_lite_regenerate_keys();
}

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeClearDatabase(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    if (!g_db_path[0]) {
        bridge_log(BLEV_ERROR, "clearDatabase: no db path");
        return JNI_FALSE;
    }
    char db_file[512], wal_file[512], shm_file[512];
    snprintf(db_file,  sizeof(db_file),  "%s/chats.db",     g_db_path);
    snprintf(wal_file, sizeof(wal_file), "%s/chats.db-wal", g_db_path);
    snprintf(shm_file, sizeof(shm_file), "%s/chats.db-shm", g_db_path);
    unlink(db_file); unlink(wal_file); unlink(shm_file);
    bridge_log(BLEV_INFO, "clearDatabase: deleted DB files at %s", g_db_path);
    return JNI_TRUE;
}

/* ── Voice recording JNI ── */

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceStart(
    JNIEnv* env, jobject thiz, jstring channelId) {
    (void)thiz;
    const char* ch = (*env)->GetStringUTFChars(env, channelId, NULL);
    int rc = utun_bridge_voice_start(ch);
    if (ch) (*env)->ReleaseStringUTFChars(env, channelId, ch);
    return (rc == 0) ? JNI_TRUE : JNI_FALSE;
}

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceFeed(
    JNIEnv* env, jobject thiz, jshortArray samples) {
    (void)env; (void)thiz;
    if (!samples) return JNI_FALSE;
    jsize len = (*env)->GetArrayLength(env, samples);
    jshort* data = (*env)->GetShortArrayElements(env, samples, NULL);
    int rc = utun_bridge_voice_feed((const int16_t*)data, (int)len);
    (*env)->ReleaseShortArrayElements(env, samples, data, JNI_ABORT);
    return (rc == 0) ? JNI_TRUE : JNI_FALSE;
}

JNIEXPORT jint JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceStop(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    int duration_ms = 0;
    utun_bridge_voice_stop(&duration_ms);
    return (jint)duration_ms;
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceCancel(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    utun_bridge_voice_cancel();
}

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceIsActive(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    return utun_bridge_voice_is_active() ? JNI_TRUE : JNI_FALSE;
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceSetPreset(
    JNIEnv* env, jobject thiz, jint preset) {
    (void)env; (void)thiz;
    utun_bridge_voice_set_preset((int)preset);
}

JNIEXPORT jint JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceGetPreset(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    return (jint)utun_bridge_voice_get_preset();
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceSetCompressor(
    JNIEnv* env, jobject thiz, jboolean enabled) {
    (void)env; (void)thiz;
    utun_bridge_voice_set_compressor(enabled ? 1 : 0);
}

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceGetCompressor(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    return utun_bridge_voice_get_compressor() ? JNI_TRUE : JNI_FALSE;
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceSetCompressorConfig(
    JNIEnv* env, jobject thiz, jint maxGainDb, jint lookbackMs, jint lookaheadMs,
    jfloat riseRate, jfloat targetLevelDb) {
    (void)env; (void)thiz;
    utun_bridge_voice_set_compressor_config((int)maxGainDb, (int)lookbackMs, (int)lookaheadMs,
                                             (float)riseRate, (float)targetLevelDb);
}

JNIEXPORT jfloat JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceGetPeakLevel(
    JNIEnv* env, jobject thiz) {
    (void)env; (void)thiz;
    return (jfloat)utun_bridge_voice_get_peak_level();
}

/* ── Attachment JNI ── */

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeAttachmentSend(
    JNIEnv* env, jobject thiz, jstring channelId, jstring filePath) {
    (void)thiz;
    const char* ch = (*env)->GetStringUTFChars(env, channelId, NULL);
    const char* fp = (*env)->GetStringUTFChars(env, filePath, NULL);
    int rc = utun_bridge_attachment_send(ch, fp, g_db_path);
    if (fp) (*env)->ReleaseStringUTFChars(env, filePath, fp);
    if (ch) (*env)->ReleaseStringUTFChars(env, channelId, ch);
    return (rc == 0) ? JNI_TRUE : JNI_FALSE;
}

JNIEXPORT jboolean JNICALL Java_com_utun_chat_data_NativeLib_nativeAttachmentDownload(
    JNIEnv* env, jobject thiz, jstring channelId, jlong msgId) {
    (void)thiz;
    const char* ch = (*env)->GetStringUTFChars(env, channelId, NULL);
    int rc = utun_bridge_attachment_download(ch, (int64_t)msgId);
    if (ch) (*env)->ReleaseStringUTFChars(env, channelId, ch);
    return (rc == 0) ? JNI_TRUE : JNI_FALSE;
}

/* ── Voice playback JNI ── */

JNIEXPORT jlong JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceDecodeOpen(
    JNIEnv* env, jobject thiz, jstring filePath, jintArray outInfo) {
    (void)thiz;
    if (!filePath || !outInfo) return 0;
    const char* fp = (*env)->GetStringUTFChars(env, filePath, NULL);
    int sr = 0, ch = 0, total = 0;
    void* h = utun_bridge_voice_decode_open(fp, &sr, &ch, &total);
    if (h) {
        jint info[3] = {sr, ch, total};
        (*env)->SetIntArrayRegion(env, outInfo, 0, 3, info);
    }
    if (fp) (*env)->ReleaseStringUTFChars(env, filePath, fp);
    return (jlong)(intptr_t)h;
}

JNIEXPORT jint JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceDecodeRead(
    JNIEnv* env, jobject thiz, jlong handle, jshortArray buf) {
    (void)thiz;
    if (handle == 0 || !buf) return -1;
    jsize max = (*env)->GetArrayLength(env, buf);
    jshort* data = (*env)->GetShortArrayElements(env, buf, NULL);
    int read = utun_bridge_voice_decode_read((void*)(intptr_t)handle, (int16_t*)data, (int)max);
    (*env)->ReleaseShortArrayElements(env, buf, data, 0);
    return (jint)read;
}

JNIEXPORT void JNICALL Java_com_utun_chat_data_NativeLib_nativeVoiceDecodeClose(
    JNIEnv* env, jobject thiz, jlong handle) {
    (void)env; (void)thiz;
    utun_bridge_voice_decode_close((void*)(intptr_t)handle);
}

#endif /* __ANDROID__ */