#include "mainwindow.h"
#include "channellist.h"
#include "messagelist.h"
#include "messagedelegate.h"
#include "accountlist.h"
#include "invitedialog.h"
#include "inviteby.h"
#include "joindialog.h"
#include "settingsdialog.h"
#include "channelsettingsdialog.h"
#include "connmonitorwindow.h"
#include "videoplayer_window.h"
#include "imageviewer_window.h"
#include "creategroupdialog.h"
#include "invite_link.h"
#include "sound_manager.h"
#include "voiceplayback.h"
#include "audiorecorder.h"
#include "voicemessageencoder.h"
#include "callwindow.h"
#include "call_audio_engine.h"
#include "ptt_hotkey_manager.h"

extern "C" {
#include "../../lib/audio_compressor.h"
}
#include "animtimer.h"
#include "../db/db_manager.h"
#include "../transport/utun_node.h"
#include "../transport/gui_bridge.h"
#include <QSplitter>
#include <QCloseEvent>
#include <QApplication>
#include <QScreen>
#include <QClipboard>
#include <QStyle>
#include <QMessageBox>
#include <QDebug>
#include <QFile>
#include <QTextStream>
#include <QDir>
#include <cmath>
#include <QJsonDocument>
#include <QJsonObject>
#include <QRandomGenerator>
#include <csignal>

extern "C" {
#include "chat/chat_core.h"
#include "call/call.h"
#include "dm/dm_core.h"
#include "../../lib/mem.h"
#include "../../lib/debug_config.h"
void chat_core_attachment_download_trampoline(void* arg);
void chat_core_save_ui_state_trampoline(void* arg);
}

static MainWindow* s_mainWindow = nullptr;

#ifndef _WIN32
static volatile std::sig_atomic_t g_signalFlag = 0;
static void unixSignalHandler(int) { g_signalFlag = 1; }
#endif

/* Сохранение key/value в БД (ui_state). Пишется из utun-потока через trampoline,
   чтобы не трогать sqlite из GUI-потока. Буфер формата key\0value\0, ≤256 байт. */
static void postUiStateKv(const char* key, const QString& value) {
    QByteArray val = value.toUtf8();
    size_t klen = strlen(key), vlen = (size_t)val.size(), total = klen + 1 + vlen + 1;
    if (total > 256) return;
    struct save_ui_state_arg* arg = (struct save_ui_state_arg*)u_malloc(sizeof(struct save_ui_state_arg));
    if (!arg) return;
    arg->inst = gui_bridge_get_inst();
    memcpy(arg->data, key, klen + 1);
    memcpy(arg->data + klen + 1, val.constData(), vlen + 1);
    gui_bridge_post_uasync_fn(chat_core_save_ui_state_trampoline, arg);
}

static void saveLastChannelId(const QString& channelId) {
    postUiStateKv("last_channel_id", channelId);
}

static void onMsgReceivedCallback(const char* ch_id, int ch_id_len, uint64_t author) {
    if (s_mainWindow)
        s_mainWindow->onMessageReceived(ch_id, ch_id_len, author);
}

static void onChannelUpdatedCallback(const char* ch_id, int ch_id_len) {
    Q_UNUSED(ch_id_len);
    Q_UNUSED(ch_id);
    if (s_mainWindow)
        s_mainWindow->reloadChannels();
}

static void onMemberListCallback(const uint8_t* data, int len) {
    if (len < 3) return;
    uint8_t cl = data[0];
    if (len < 1 + (int)cl + 2) return;
    uint16_t count; memcpy(&count, data + 1 + cl, 2);
    if (s_mainWindow)
        s_mainWindow->onMemberList(QString::fromUtf8((const char*)data + 1, cl), count, data + 1 + cl + 2, len - 1 - cl - 2);
}

static void onMemberUpdatedCallback(const uint8_t* data, int len) {
    if (len < 1) return;
    uint8_t cl = data[0];
    if (len < 1 + (int)cl + 1 + 79) return;
    if (s_mainWindow)
        s_mainWindow->onMemberUpdated(QString::fromUtf8((const char*)data + 1, cl), data + 1 + cl + 1);
}

static void onMemberRemovedCallback(const uint8_t* data, int len) {
    if (len < 1) return;
    uint8_t cl = data[0];
    if (len < 1 + (int)cl + 8) return;
    uint64_t nid; memcpy(&nid, data + 1 + cl, 8);
    if (s_mainWindow)
        s_mainWindow->onMemberRemoved(QString::fromUtf8((const char*)data + 1, cl), nid);
}

static void onAutoConnectStatusCallback(uint8_t status, uint16_t total_tried,
                                         uint16_t node_count, uint16_t connected) {
    if (s_mainWindow)
        s_mainWindow->onAutoConnectStatus(status, total_tried, node_count, connected);
}

static void onChannelPeersOnlineCallback(const char* ch_id, int ch_id_len, uint16_t online) {
    if (s_mainWindow)
        s_mainWindow->onChannelPeersOnline(ch_id, ch_id_len, online);
}

MainWindow::MainWindow(QWidget *parent, DbManager* db, const QString& cfgPath,
                       const QString& dbPath, const QString& debugFile,
                       const QString& debugLevel, const QString& debugCategories)
    : QMainWindow(parent)
    , m_channelList(nullptr), m_messageList(nullptr), m_accountList(nullptr)
    , m_trayIcon(nullptr), m_trayMenu(nullptr)
    , m_db(db), m_cfgPath(cfgPath), m_cfgDbPath(dbPath)
    , m_cfgDebugFile(debugFile), m_cfgDebugLevel(debugLevel)
    , m_cfgDebugCategories(debugCategories)
    , m_recorder(nullptr)
    , m_autoPlayTimer(new QTimer(this))
{
    setWindowTitle("vibechat");
    resize(900, 600);
    if (m_db) m_db->setDbPath(m_cfgDbPath);
    setupUi();
    setupTray();
    setupSoundFromConfig();
    if (m_db) {
        setupBridgeCallbacks();
        setupMessaging();
        setupNode();
        setupConnects();
    }
    connect(m_autoPlayTimer, &QTimer::timeout, this, &MainWindow::autoPlayTimerTick);

#ifndef _WIN32
    std::signal(SIGINT, unixSignalHandler);
    std::signal(SIGTERM, unixSignalHandler);
    m_shutdownTimer = new QTimer(this);
    connect(m_shutdownTimer, &QTimer::timeout, this, &MainWindow::onShutdownCheck);
    m_shutdownTimer->start(200);
#endif
}

MainWindow::~MainWindow() {
    s_mainWindow = nullptr;
    m_autoPlayTimer->stop();
    gui_bridge_set_msg_received_cb(nullptr);
    gui_bridge_set_channel_updated_cb(nullptr);
    gui_bridge_set_member_list_cb(nullptr);
    gui_bridge_set_member_updated_cb(nullptr);
    gui_bridge_set_member_removed_cb(nullptr);
    gui_bridge_set_my_node_id_cb(nullptr);
    gui_bridge_set_auto_connect_status_cb(nullptr);
    gui_bridge_set_channel_peers_online_cb(nullptr);
    gui_bridge_set_db_ready_cb(nullptr);
    gui_bridge_set_attachment_downloaded_cb(nullptr);
    QCoreApplication::processEvents(QEventLoop::AllEvents);
    if (m_recorder) { m_recorder->shutdown(); m_recorder = nullptr; }
    SoundManager::instance()->shutdown();
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: ~MainWindow — saving channel state");
    if (m_messageList) m_messageList->saveChannelState();
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: ~MainWindow — stopping utun node");
    if (m_node) { m_node->stop(); delete m_node; m_node = nullptr; }
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: ~MainWindow — node stop+delete done");
    AnimTimer::shutdown();
    MessageList::cleanupAnimations();
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: ~MainWindow — animations cleaned");
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: ~MainWindow done");
}

void MainWindow::setupUi() {
    auto *splitter = new QSplitter(Qt::Horizontal, this);
    m_splitter = splitter;

    m_channelList = new ChannelList(m_db, splitter);
    m_recorder = new AudioRecorder(this);
    m_messageList = new MessageList(m_db, m_recorder, splitter);
    m_accountList = new AccountList(m_db, splitter);

    splitter->addWidget(m_channelList);
    splitter->addWidget(m_messageList);
    splitter->addWidget(m_accountList);

    splitter->setStretchFactor(0, 2);
    splitter->setStretchFactor(1, 5);
    splitter->setStretchFactor(2, 1);

    splitter->setSizes({220, 480, 180});

    setCentralWidget(splitter);
}

void MainWindow::saveWindowGeometry() {
    QRect g = normalGeometry();
    if (g.isEmpty()) g = geometry();
    postUiStateKv("window_geometry",
        QStringLiteral("%1,%2,%3,%4").arg(g.width()).arg(g.height()).arg(g.x()).arg(g.y()));
    postUiStateKv("window_maximized", isMaximized() ? QStringLiteral("1") : QStringLiteral("0"));

    if (m_splitter) {
        const QList<int> sizes = m_splitter->sizes();
        if (sizes.size() == 3)
            postUiStateKv("window_splitter",
                QStringLiteral("%1,%2,%3").arg(sizes[0]).arg(sizes[1]).arg(sizes[2]));
    }
}

void MainWindow::restoreWindowGeometry() {
    if (!m_db) return;
    const QStringList p = m_db->getUiState("window_geometry").split(',');
    if (p.size() != 4) return;
    int w = p[0].toInt(), h = p[1].toInt(), x = p[2].toInt(), y = p[3].toInt();
    if (w <= 0 || h <= 0) return;

    QRect target(x, y, w, h);
    bool visible = false;
    for (const QScreen* s : QGuiApplication::screens()) {
        if (s->availableGeometry().intersects(target)) { visible = true; break; }
    }
    if (!visible) target.moveTo(0, 0);

    setGeometry(target);
    if (m_db->getUiStateInt("window_maximized", 0))
        showMaximized();

    if (m_splitter) {
        const QStringList sp = m_db->getUiState("window_splitter").split(',');
        if (sp.size() == 3) {
            int s0 = sp[0].toInt(), s1 = sp[1].toInt(), s2 = sp[2].toInt();
            if (s0 > 0 && s1 > 0 && s2 > 0)
                m_splitter->setSizes({s0, s1, s2});
        }
    }
}

void MainWindow::setupNode() {
    m_node = new UtunNode(this);
    connect(m_node, &UtunNode::error, this, [](const QString& msg) {
        qWarning("UtunNode error: %s", qPrintable(msg));
    });
    connect(m_node, &UtunNode::started, this, [this]() {
        qDebug("UtunNode started");
    });
    connect(m_node, &UtunNode::stopped, this, [this]() {
        qDebug("UtunNode stopped");
        qApp->quit();
    });

    if (!m_cfgDebugFile.isEmpty())
        m_node->setDebugFile(m_cfgDebugFile);
    if (!m_cfgDebugLevel.isEmpty())
        m_node->setDebugLevel(m_cfgDebugLevel);
        if (!m_cfgDebugCategories.isEmpty())
            m_node->setDebugCategories(m_cfgDebugCategories);

    if (!m_cfgDbPath.isEmpty())
        m_node->setDbPath(m_cfgDbPath);

    if (!m_node->start(m_cfgPath))
        qWarning("Failed to start UtunNode");
    else
        AnimTimer::instance()->logRegisteredIcons();
}

void MainWindow::setupMessaging() {
    gui_bridge_init();
}

void MainWindow::setupSoundFromConfig() {
    SoundManager* sm = SoundManager::instance();
    if (!sm->init()) return;

    QString soundDir, msgInFile, msgOutFile, connectFile, disconnectFile, callInFile;
    QFile cfgFile(m_cfgPath);
    if (cfgFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
        bool inGui = false;
        QTextStream in(&cfgFile);
        while (!in.atEnd()) {
            QString line = in.readLine().trimmed();
            if (line == "[gui]") { inGui = true; continue; }
            if (line.startsWith("[") && line.endsWith("]")) inGui = false;
            if (!inGui) continue;
            if (line.startsWith("sound_dir="))           soundDir = line.mid(10).trimmed();
            else if (line.startsWith("sound_msg_incoming=")) msgInFile = line.mid(19).trimmed();
            else if (line.startsWith("sound_msg_outgoing=")) msgOutFile = line.mid(19).trimmed();
            else if (line.startsWith("sound_connect="))      connectFile = line.mid(14).trimmed();
            else if (line.startsWith("sound_disconnect="))   disconnectFile = line.mid(17).trimmed();
            else if (line.startsWith("sound_call_incoming=")) callInFile = line.mid(20).trimmed();
        }
        cfgFile.close();
    }

    if (soundDir.isEmpty()) soundDir = "sounds";
    QDir binDir(QApplication::applicationDirPath());
    QString baseDir = QDir::isAbsolutePath(soundDir) ? soundDir : binDir.absoluteFilePath(soundDir);
    auto resolvePath = [&baseDir](const QString& f) { return f.isEmpty() ? QString() : QDir::cleanPath(baseDir + "/" + f); };

    if (msgInFile.isEmpty())
        sm->loadSound("msg_incoming", ":/sounds/msg_incoming.mp3");
    else
        sm->loadSound("msg_incoming", resolvePath(msgInFile));

    if (callInFile.isEmpty())
        sm->loadSound("call_incoming", ":/sounds/call_incoming.mp3");
    else
        sm->loadSound("call_incoming", resolvePath(callInFile));

    sm->loadSound("call_connecting", ":/sounds/call_connecting.mp3");
    sm->loadSound("call_ringing", ":/sounds/call_ringing.mp3");

    if (!msgOutFile.isEmpty())  sm->loadSound("msg_outgoing", resolvePath(msgOutFile));
    if (!connectFile.isEmpty()) sm->loadSound("connect", resolvePath(connectFile));
    if (!disconnectFile.isEmpty()) sm->loadSound("disconnect", resolvePath(disconnectFile));
    if (m_db && m_db->isOpen()) {
        sm->setEnabled(m_db->getUiStateInt("sound_enabled", 1));
        sm->setVolume(m_db->getUiStateInt("sound_volume", 80) / 100.0f);
        QString se[] = {"msg_incoming", "msg_outgoing", "connect", "disconnect",
                        "call_incoming", "call_connecting", "call_ringing"};
        for (int i = 0; i < 7; i++) {
            const QString& ek = se[i];
            sm->setEvent(ek, m_db->getUiStateInt(QStringLiteral("sound_%1_on").arg(ek), (i == 0 || i >= 4) ? 1 : 0),
                         m_db->getUiStateInt(QStringLiteral("sound_%1_vol").arg(ek), 80) / 100.0f);
        }
    }

    if (m_recorder) {
        m_recorder->init();
        if (m_db && m_db->isOpen()) {
            m_recorder->setCaptureDeviceIndex(m_db->getUiStateInt("audio_input_device", -1));
            VoiceEncoder::setPreset(m_db->getUiStateInt("opus_codec_preset", 1));

            int compEnabled = m_db->getUiStateInt("compressor_enabled", 0);
            m_recorder->setCompressorEnabled(compEnabled != 0);
            if (m_recorder->compressor()) {
                audio_compressor_config_t compCfg = {0};
                compCfg.sample_rate = 48000;
                compCfg.channels = 1;
                compCfg.max_gain_db = (float)m_db->getUiStateInt("compressor_max_gain_db", 25);
                compCfg.lookback_ms = 200;
                compCfg.lookahead_ms = 100;
                compCfg.rise_rate_per_sec = (float)m_db->getUiStateInt("compressor_rise_rate", 10);
                compCfg.target_level = 1.0f;
                audio_compressor_configure(m_recorder->compressor(), &compCfg);
            }
        }
        DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "AudioRecorder initialized (captureDevice=%d, opusPreset=%d, compressor=%d)",
                   m_recorder->captureDeviceIndex(), VoiceEncoder::preset(),
                   m_recorder->isCompressorEnabled() ? 1 : 0);
    }
}

void MainWindow::setupBridgeCallbacks() {
    s_mainWindow = this;
    gui_bridge_set_msg_received_cb(onMsgReceivedCallback);
    gui_bridge_set_channel_updated_cb(onChannelUpdatedCallback);
    gui_bridge_set_member_list_cb(onMemberListCallback);
    gui_bridge_set_member_updated_cb(onMemberUpdatedCallback);
    gui_bridge_set_member_removed_cb(onMemberRemovedCallback);
    gui_bridge_set_my_node_id_cb([](uint64_t nid) {
        qDebug("MainWindow: MY_NODE_ID setMyNodeId(%016llx)", (unsigned long long)nid);
        if (s_mainWindow && s_mainWindow->m_db) s_mainWindow->m_db->setMyNodeId((quint64)nid);
    });
    gui_bridge_set_auto_connect_status_cb(onAutoConnectStatusCallback);
    gui_bridge_set_channel_peers_online_cb(onChannelPeersOnlineCallback);
    gui_bridge_set_db_ready_cb([]() {
        if (!s_mainWindow || !s_mainWindow->m_db) return;
        s_mainWindow->m_db->setDb(chat_core_get_db(gui_bridge_get_inst()));
        s_mainWindow->m_channelList->loadChannels();
        s_mainWindow->restoreWindowGeometry();
        PttHotkeyManager::instance()->init(s_mainWindow->m_db);   /* глобальные PTT-хоткеи */
        QString lastCid = s_mainWindow->m_db->getUiState("last_channel_id");
        if (!lastCid.isEmpty()) {
            /* восстанавливаем канал только если он реально существует в БД —
               иначе не дёргаем подключение к несуществующей группе */
            bool exists = false;
            const auto chs = s_mainWindow->m_db->getChannels();
            for (const auto& ch : chs) { if (ch.channelId == lastCid) { exists = true; break; } }
            if (exists) {
                s_mainWindow->m_channelList->selectChannel(lastCid);
                s_mainWindow->m_accountList->setChannel(lastCid);
                s_mainWindow->m_currentChannelId = lastCid;
                s_mainWindow->m_messageList->loadChannel(lastCid);
            } else {
                saveLastChannelId(QString());
            }
        }
    });
    gui_bridge_set_attachment_downloaded_cb([](const char* ch_id, int ch_id_len, int64_t msg_id) {
        if (!s_mainWindow) return;
        QString chId = QString::fromUtf8(ch_id, ch_id_len);
        s_mainWindow->m_channelList->loadChannels();
        s_mainWindow->m_messageList->onAttachmentDownloaded(chId, msg_id);
        s_mainWindow->onAttachmentDownloadedForAutoPlay(chId, msg_id);
    });
    gui_bridge_set_download_progress_cb([](const char* ch_id, int ch_id_len, int64_t msg_id, int blocks_done, int num_blocks) {
        if (!s_mainWindow) return;
        QString chId = QString::fromUtf8(ch_id, ch_id_len);
        s_mainWindow->m_messageList->updateMessageProgress(chId, msg_id, blocks_done, num_blocks);
    });
    gui_bridge_set_admin_key_received_cb([](const uint8_t* data, int len) {
        if (!s_mainWindow || len < 2) return;
        uint8_t chLen = data[0];
        if (len < 1 + chLen + 8) return;
        QString chId = QString::fromUtf8((const char*)data + 1, chLen);
        uint64_t from; memcpy(&from, data + 1 + chLen, 8);
        s_mainWindow->m_trayIcon->showMessage(
            "vibechat",
            QStringLiteral("You are now a channel co-owner.\nReceived admin key for channel %1 from 0x%2")
                .arg(chId).arg(QString::number(from, 16)),
            QSystemTrayIcon::Information, 5000);
        if (s_mainWindow->m_currentChannelId == chId)
            s_mainWindow->m_accountList->setChannel(chId);
    });

    /* ── звонки ── */
    gui_bridge_set_call_incoming_cb([](const char* ch_id, int ch_id_len, uint64_t caller, uint64_t call_id) {
        if (!s_mainWindow) return;
        s_mainWindow->onCallIncoming(QString::fromUtf8(ch_id, ch_id_len), caller, call_id);
    });
    gui_bridge_set_call_ringing_cb([](uint64_t call_id) {
        if (s_mainWindow) s_mainWindow->onCallRinging(call_id);
    });
    gui_bridge_set_call_accepted_cb([](uint64_t call_id) {
        if (s_mainWindow) s_mainWindow->onCallAccepted(call_id);
    });
    gui_bridge_set_call_ended_cb([](uint64_t call_id, uint8_t reason) {
        if (s_mainWindow) s_mainWindow->onCallEnded(call_id, reason);
    });
    gui_bridge_set_call_declined_cb([](uint64_t call_id, uint8_t reason) {
        if (s_mainWindow) s_mainWindow->onCallEnded(call_id, reason);
    });
    gui_bridge_set_call_error_cb([](uint64_t call_id, uint8_t err, const char* text, int len) {
        Q_UNUSED(text); Q_UNUSED(len);
        if (s_mainWindow) s_mainWindow->onCallError(call_id, err);
    });
    gui_bridge_set_call_stats_cb([](uint64_t id, int rtt, int buffer, int tempo, int dropped,
                                    int underruns, int minimum, int maximum, int reserve) {
        if (!s_mainWindow) return;
        auto* w = s_mainWindow->m_activeCalls.value(id, nullptr);
        if (w) w->setAudioStats(rtt, buffer, tempo, dropped, underruns, minimum, maximum, reserve);
    });
    gui_bridge_set_call_path_cb([](uint64_t call_id, const char* text, int len) {
        if (s_mainWindow) s_mainWindow->onCallPath(call_id, QString::fromUtf8(text, len));
    });
    gui_bridge_set_call_connection_cb([](uint64_t id, uint8_t type, uint64_t nextHop) {
        if (!s_mainWindow) return;
        auto* w = s_mainWindow->m_activeCalls.value(id, nullptr);
        if (w && w->state() != CallWindow::Ended) w->setConnectionType(type, nextHop);
    });

    /* ── рация: индикация говорящего ── */
    gui_bridge_set_radio_talk_cb([](uint64_t group_id, uint64_t src_node_id, uint8_t on) {
        if (s_mainWindow && s_mainWindow->m_messageList)
            s_mainWindow->m_messageList->onRadioTalk((quint64)group_id, (quint64)src_node_id, on != 0);
    });

    /* ── DM (p2p чат) ── */
    gui_bridge_set_dm_conv_updated_cb([](const char* conv_id, int conv_id_len) {
        if (s_mainWindow)
            s_mainWindow->onDmConvUpdated(QString::fromUtf8(conv_id, conv_id_len));
    });
    gui_bridge_set_dm_msg_received_cb([](const char* conv_id, int conv_id_len, uint64_t author) {
        if (s_mainWindow)
            s_mainWindow->onDmMsgReceived(QString::fromUtf8(conv_id, conv_id_len), author);
    });
    gui_bridge_set_dm_messages_cb([](const uint8_t* data, int len) {
        if (s_mainWindow)
            s_mainWindow->m_messageList->onDmMessages(data, len);
    });
    gui_bridge_set_attachment_preparation_cb([](const uint8_t* data, int len) {
        if (s_mainWindow) s_mainWindow->m_messageList->onAttachmentPreparation(data, len);
    });
}

void MainWindow::setupConnects() {
    connect(m_channelList, &ChannelList::channelSelected,
            this, [this](const QString& channelId) {
                saveLastChannelId(channelId);
                m_currentChannelId = channelId;
                m_messageList->loadChannel(channelId);
                if (channelId.startsWith(QStringLiteral("dm:"))) {
                    /* DM: беседа уже создана/обслуживается dm_core */
                    m_accountList->setChannel(QString());
                    m_channelList->setChannelUnreadCount(channelId, 0);
                    return;
                }
                m_accountList->setChannel(channelId);
                struct chat_create_auto_arg* arg = (struct chat_create_auto_arg*)u_calloc(1, sizeof(*arg));
                if (arg) {
                    arg->inst = gui_bridge_get_inst();
                    snprintf(arg->name, sizeof(arg->name), "%s", channelId.toUtf8().constData());
                    gui_bridge_post_uasync_fn(chat_core_connect_channel_trampoline, arg);
                }
            });
    connect(m_channelList, &ChannelList::inviteRequested,         this, &MainWindow::showShareInviteDialog);
    connect(m_channelList, &ChannelList::inviteByLinkRequested,  this, &MainWindow::showInviteByLinkDialog);
    connect(m_channelList, &ChannelList::joinRequested,       this, &MainWindow::showJoinDialog);
    connect(m_channelList, &ChannelList::createGroupRequested, this, &MainWindow::onCreateGroupRequested);
    connect(m_channelList, &ChannelList::settingsRequested,   this, &MainWindow::showSettings);
    connect(m_channelList, &ChannelList::connMonitorRequested, this, &MainWindow::showConnMonitor);
    connect(m_channelList, &ChannelList::channelSettingsRequested, this, &MainWindow::showChannelSettings);
    connect(m_accountList, &AccountList::memberRenamed,
            m_messageList, &MessageList::reloadLocalNicks);
    connect(m_accountList, &AccountList::callRequested, this, &MainWindow::onCallRequested);
    connect(m_accountList, &AccountList::pmRequested, this, &MainWindow::onPmRequested);
    connect(m_messageList, &MessageList::readPositionChanged,
            this, [this](const QString& channelId, qint64 lastReadMsgId) {
                Q_UNUSED(lastReadMsgId);
                if (m_channelList && m_db)
                    m_channelList->setChannelUnreadCount(channelId,
                        m_db->getUnreadCount(channelId, lastReadMsgId));
            });
    connect(m_messageList, &MessageList::openVideoRequested, this, &MainWindow::openVideo);
    connect(m_messageList, &MessageList::openImageRequested, this, &MainWindow::openImage);
}

/* ── звонки ── */

void MainWindow::onCallRequested(const QString& chId, quint64 nodeId, const QString& name) {
    quint64 callId = QRandomGenerator::global()->generate64();
    if (!callId) callId = 1;

    struct call_start_arg* a = (struct call_start_arg*)u_malloc(sizeof(*a));
    if (!a) return;
    memset(a, 0, sizeof(*a));
    a->inst = gui_bridge_get_inst();
    strncpy(a->ch_id, chId.toUtf8().constData(), sizeof(a->ch_id) - 1);
    a->peer_node_id = nodeId;
    a->call_id = callId;
    gui_bridge_post_uasync_fn(call_start_trampoline, a);

    CallWindow* w = new CallWindow(this);
    w->setCallId(callId);
    w->setPeerName(name);
    w->setState(CallWindow::Outgoing);
    connect(w, &CallWindow::closed, this, &MainWindow::closeCallWindow);
    m_activeCalls.insert(callId, w);
    w->show();

    SoundManager::instance()->playLoop("call_connecting");
}

void MainWindow::onCallIncoming(const QString& chId, quint64 caller, quint64 callId) {
    Q_UNUSED(chId);
    if (m_activeCalls.contains(callId)) return;
    QString name = m_db->getDisplayName(caller);
    if (name.isEmpty()) name = QStringLiteral("0x%1").arg(caller, 16, 16, QChar('0'));

    SoundManager::instance()->playLoop("call_incoming");
    if (!isVisible() || isMinimized()) {
        m_trayIcon->showMessage("vibechat", QStringLiteral("Incoming call from %1").arg(name),
                                QSystemTrayIcon::Information, 5000);
    }

    CallWindow* w = new CallWindow(this);
    w->setCallId(callId);
    w->setPeerName(name);
    w->setState(CallWindow::Incoming);
    connect(w, &CallWindow::closed, this, &MainWindow::closeCallWindow);
    m_activeCalls.insert(callId, w);
    w->show();
    w->raise();
    w->activateWindow();
}

void MainWindow::onCallRinging(quint64 callId) {
    /* caller: INVITE доставлен, у пира идёт вызов — фаза 2 (гудки) */
    CallWindow* w = m_activeCalls.value(callId, nullptr);
    if (w && w->state() == CallWindow::Outgoing)
        w->setState(CallWindow::Ringing);
    SoundManager::instance()->playLoop("call_ringing");
}

void MainWindow::onCallAccepted(quint64 callId) {
    SoundManager::instance()->stopLoop();
    CallWindow* w = m_activeCalls.value(callId, nullptr);
    if (w) w->setState(CallWindow::Active);
    if (m_db)
        CallAudioEngine::instance()->setPlaybackDeviceIndex(m_db->getUiStateInt("audio_output_device", -1));
    CallAudioEngine::instance()->start(callId);
}

void MainWindow::onCallEnded(quint64 callId, uint8_t reason) {
    Q_UNUSED(reason);
    /* тон завершения (~450мс) → авто-teardown аудио-движка */
    if (CallAudioEngine::instance()->callId() == callId)
        CallAudioEngine::instance()->beginEnd(callId);
    closeCallWindow(callId);
}

void MainWindow::onCallError(quint64 callId, uint8_t err) {
    /* пир офлайн / нет маршрута — звонок не состоялся */
    DEBUG_INFO(DEBUG_CATEGORY_DEBUG, "MainWindow: call error id=%016llx err=%u", (unsigned long long)callId, (unsigned)err);
    closeCallWindow(callId);
}

void MainWindow::onCallPath(quint64 callId, const QString& path) {
    CallWindow* w = m_activeCalls.value(callId, nullptr);
    if (w) w->setBgpPath(path);
}

void MainWindow::closeCallWindow(quint64 callId) {
    SoundManager::instance()->stopLoop();
    CallWindow* w = m_activeCalls.take(callId);
    if (!w) return;
    w->disconnect(this);
    w->deleteLater();
}

/* ── DM (p2p чат) ── */

void MainWindow::onPmRequested(const QString& chId, quint64 nodeId, const QString& name) {
    struct dm_start_req* r = (struct dm_start_req*)u_malloc(sizeof(*r));
    if (!r) return;
    memset(r, 0, sizeof(*r));
    r->inst = gui_bridge_get_inst();
    r->peer_node_id = nodeId;
    strncpy(r->source_ch_id, chId.toUtf8().constData(), sizeof(r->source_ch_id) - 1);
    strncpy(r->peer_name, name.toUtf8().constData(), sizeof(r->peer_name) - 1);
    gui_bridge_post_uasync_fn(dm_start_trampoline, r);
    /* открытие беседы произойдёт по CHAT_EVT_DM_CONV_UPDATED (onDmConvUpdated) */
}

void MainWindow::onDmConvUpdated(const QString& convId) {
    if (!m_channelList) return;
    QString key = QStringLiteral("dm:") + convId;
    m_channelList->loadChannels();
    m_channelList->selectChannel(key);
}

void MainWindow::onDmMsgReceived(const QString& convId, quint64 author) {
    QString key = QStringLiteral("dm:") + convId;
    if (m_currentChannelId == key) {
        m_messageList->refresh();
        return;
    }
    if (author == m_db->myNodeId()) return;
    if (m_channelList)
        m_channelList->setChannelUnreadCount(key, m_channelList->getChannelUnreadCount(key) + 1);
}

void MainWindow::setupTray() {
    m_trayIcon = new QSystemTrayIcon(this);
    m_trayIcon->setIcon(QIcon(":/icons/app_icon.png"));
    m_trayIcon->setToolTip("vibechat");

    m_trayMenu = new QMenu(this);
    QAction *settingsAction = m_trayMenu->addAction("Settings");
    connect(settingsAction, &QAction::triggered, this, &MainWindow::showSettings);

    m_trayMenu->addSeparator();

    QAction *showAction = m_trayMenu->addAction("Show");
    connect(showAction, &QAction::triggered, this, [this]() {
        show();
        raise();
        activateWindow();
    });

    QAction *quitAction = m_trayMenu->addAction("Quit");
    connect(quitAction, &QAction::triggered, this, &MainWindow::requestShutdown);

    m_trayIcon->setContextMenu(m_trayMenu);

    connect(m_trayIcon, &QSystemTrayIcon::activated,
            this, &MainWindow::onTrayActivated);

    m_trayIcon->show();
}

void MainWindow::closeEvent(QCloseEvent *event) {
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: closeEvent — hiding to tray");
    saveWindowGeometry();
    hide();
    m_trayIcon->showMessage("vibechat", "Application minimized to tray.",
                             QSystemTrayIcon::Information, 2000);
    event->ignore();
}

void MainWindow::requestShutdown() {
    DEBUG_DEBUG(DEBUG_CATEGORY_GENERAL, "MainWindow: requestShutdown — saving geometry and stopping node");
    saveWindowGeometry();
    if (m_node) m_node->requestStop();
}

void MainWindow::onShutdownCheck() {
#ifndef _WIN32
    if (g_signalFlag)
        requestShutdown();
#endif
}

void MainWindow::onTrayActivated(QSystemTrayIcon::ActivationReason reason) {
    if (reason == QSystemTrayIcon::Trigger ||
        reason == QSystemTrayIcon::DoubleClick) {
        show();
        raise();
        activateWindow();
    }
}

void MainWindow::showShareInviteDialog(const QString& channelId) {
    if (!m_db || !m_db->isOpen()) return;

    ShareInviteDialog dlg(channelId, m_db, this);
    dlg.exec();
}

void MainWindow::showInviteByLinkDialog(const QString& channelId) {
    if (!m_node || !m_node->isRunning()) {
        QMessageBox::warning(this, "Error", "Node is not running.");
        return;
    }
    InviteByLinkDialog dlg(channelId, m_node, this);
    dlg.exec();
}

void MainWindow::showJoinDialog() {
    if (!m_node || !m_node->isRunning()) {
        QMessageBox::warning(this, "Error", "Node is not running.");
        return;
    }

    QString autoLink;
    QClipboard* cb = QApplication::clipboard();
    QString clipText = cb->text(QClipboard::Clipboard).trimmed();
    if (clipText.startsWith("utun://") && decodeInviteLink(clipText).error.isEmpty())
        autoLink = clipText;
    else if (cb->supportsSelection()) {
        QString selText = cb->text(QClipboard::Selection).trimmed();
        if (selText.startsWith("utun://") && decodeInviteLink(selText).error.isEmpty())
            autoLink = selText;
    }

    JoinDialog dlg(m_node, m_db, this, autoLink);
    dlg.exec();
}

void MainWindow::showSettings() {
    SettingsDialog dlg(m_cfgPath, m_db, m_node, m_recorder, this);
    dlg.exec();
    reloadChannels();
}

void MainWindow::showConnMonitor() {
    if (m_connMonitor) {
        m_connMonitor->raise();
        m_connMonitor->activateWindow();
        return;
    }
    m_connMonitor = new ConnMonitorWindow(nullptr);
    connect(m_connMonitor, &QDialog::destroyed, this, [this] { m_connMonitor = nullptr; });
    m_connMonitor->show();
}

void MainWindow::openVideo(const QString& filePath) {
    if (!m_videoPlayer) {
        m_videoPlayer = new VideoPlayerWindow(nullptr);
        connect(m_videoPlayer, &VideoPlayerWindow::closed, this, [this] {
            m_videoPlayer->deleteLater();
            m_videoPlayer = nullptr;
        });
    } else {
        m_videoPlayer->raise();
        m_videoPlayer->activateWindow();
    }
    m_videoPlayer->playFile(filePath);
}

void MainWindow::openImage(const QString& filePath) {
    if (!m_imageViewer) {
        m_imageViewer = new ImageViewerWindow(nullptr);
        connect(m_imageViewer, &ImageViewerWindow::closed, this, [this] {
            m_imageViewer->deleteLater();
            m_imageViewer = nullptr;
        });
    } else {
        m_imageViewer->raise();
        m_imageViewer->activateWindow();
    }
    m_imageViewer->loadFile(filePath);
    m_imageViewer->showFullScreen();
}

void MainWindow::onMessageReceived(const char* ch_id, int ch_id_len, uint64_t author) {
    QString cid = QString::fromUtf8(ch_id, ch_id_len);
    if (m_db && author != m_db->myNodeId()
        && m_db->getUiStateInt(QStringLiteral("ch_%1_sound_on_message").arg(cid), 1))
        SoundManager::instance()->play("msg_incoming");
    if (m_messageList) {
        if (cid == m_currentChannelId) {
            m_messageList->refresh();
        } else if (m_channelList) {
            int unread = m_channelList->getChannelUnreadCount(cid) + 1;
            DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "MainWindow::onMessageReceived increment unread ch=%s %d->%d",
                       qPrintable(cid), unread - 1, unread);
            m_channelList->setChannelUnreadCount(cid, unread);
        }
    }
    if (m_db && m_db->getUiStateInt("channel_sort", 0) == 1)
        reloadChannels();

    if (m_db && m_db->isOpen() && m_db->getUiStateInt(QStringLiteral("ch_%1_auto_play_voice").arg(cid), 0)) {
        QTimer::singleShot(100, this, [this, cid]() { autoPlayCheckNewMessage(cid); });
    }
}

void MainWindow::onMemberList(const QString& chId, int count, const uint8_t* data, int dataLen) {
    m_accountList->onMemberList(chId, count, data, dataLen);
}

void MainWindow::onMemberUpdated(const QString& chId, const uint8_t* data) {
    m_accountList->onMemberUpdated(chId, data);
}

void MainWindow::onMemberRemoved(const QString& chId, uint64_t nodeId) {
    m_accountList->onMemberRemoved(chId, nodeId);
}

void MainWindow::onAutoConnectStatus(uint8_t status, uint16_t /*total_tried*/,
                                      uint16_t /*node_count*/, uint16_t /*connected*/) {
    if (m_channelList) {
        m_channelList->setAutoConnectActive(status == 0);
    }
}

void MainWindow::onChannelPeersOnline(const char* ch_id, int ch_id_len, uint16_t online) {
    if (m_channelList) {
        QString cid = QString::fromUtf8(ch_id, ch_id_len);
        m_channelList->setChannelPeersOnline(cid, (int)online);
    }
}

void MainWindow::reloadChannels() {
    if (m_channelList) {
        m_channelList->loadChannels();
        if (!m_pendingChannelSelect.isEmpty()) {
            m_channelList->selectChannel(m_pendingChannelSelect);
            m_accountList->setChannel(m_pendingChannelSelect);
            m_messageList->loadChannel(m_pendingChannelSelect);
            saveLastChannelId(m_pendingChannelSelect);
            m_currentChannelId = m_pendingChannelSelect;
            m_pendingChannelSelect.clear();
        }
    }
}

void MainWindow::onCreateGroupRequested() {
    if (!m_node || !m_node->isRunning()) {
        QMessageBox::warning(this, "Error", "Node is not running.");
        return;
    }
    if (!gui_bridge_is_uasync_ready()) {
        QMessageBox::warning(this, "Error", "uTun thread is not ready yet. Please wait and try again.");
        return;
    }

    CreateGroupDialog dlg(this);
    if (dlg.exec() != QDialog::Accepted) return;

    QString name = dlg.groupName();
    if (name.isEmpty()) return;

    char* name_copy = u_strdup(name.toUtf8().constData());
    if (name_copy) {
        struct chat_create_auto_arg* arg = (struct chat_create_auto_arg*)u_malloc(sizeof(*arg));
        if (arg) {
            arg->inst = gui_bridge_get_inst();
            snprintf(arg->name, sizeof(arg->name), "%s", name_copy);
            gui_bridge_post_uasync_fn(chat_core_create_channel_auto_trampoline, arg);
        }
        u_free(name_copy);
    }

    DEBUG_INFO(DEBUG_CATEGORY_DEBUG, "MainWindow: create group request posted name=%s", qPrintable(name));
}

void MainWindow::showChannelSettings(const QString& channelId) {
    ChannelSettingsDialog dlg(channelId, m_db, this);
    dlg.exec();
}

QString MainWindow::autoPlayMediaDir() const {
    if (m_db && m_db->isOpen())
        return m_db->dbPath() + QStringLiteral("/media");
    return QString();
}

void MainWindow::autoPlayCheckNewMessage(const QString& channelId) {
    if (!m_db || !m_db->isOpen()) return;
    auto msgs = m_db->getMessages(channelId, 1);
    if (msgs.isEmpty()) return;
    const MessageRow& msg = msgs.first();
    if (msg.isOutgoing || msg.contentType != QStringLiteral("audio/opus"))
        return;

    AutoPlayItem item;
    item.channelId = channelId;
    item.msgId = msg.id;
    item.downloadStarted = false;
    item.durationSec = 0.0f;

    QByteArray data = msg.data;
    if (data.startsWith("wf=")) {
        QString raw = QString::fromUtf8(data);
        int durPos = raw.indexOf(";dur=", 3);
        if (durPos > 0) {
            int durEnd = raw.indexOf(';', durPos + 5);
            if (durEnd > 0) {
                int durMs = raw.mid(durPos + 5, durEnd - durPos - 5).toInt();
                item.durationSec = durMs / 1000.0f;
            }
        }
    }

    QJsonObject la = QJsonDocument::fromJson(msg.localAttrs).object();
    QString fp = la.value(QStringLiteral("fp")).toString();
    if (!fp.isEmpty()) {
        QString fullPath = autoPlayMediaDir() + QStringLiteral("/") + channelId + QStringLiteral("/") + fp;
        if (QFile::exists(fullPath)) {
            m_autoPlayQueue.enqueue(item);
            DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "auto-play: enqueue ch=%s msg=%lld file=%s",
                       qPrintable(channelId), (long long)msg.id, qPrintable(fullPath));
            if (!m_autoPlayTimer->isActive())
                m_autoPlayTimer->start(200);
            if (!SoundManager::instance()->isCurrentPcmPlaying())
                autoPlayTimerTick();
            return;
        }
    }

    struct attachment_dl_req* req = (struct attachment_dl_req*)
        u_malloc(sizeof(struct attachment_dl_req));
    if (!req) return;
    memset(req, 0, sizeof(*req));
    req->inst = gui_bridge_get_inst();
    strncpy(req->channel_id, channelId.toUtf8().constData(), sizeof(req->channel_id) - 1);
    req->msg_id = msg.id;
    gui_bridge_post_uasync_fn(chat_core_attachment_download_trampoline, req);

    item.downloadStarted = true;
    m_autoPlayQueue.enqueue(item);
    m_autoPlayDownloading.insert(msg.id);
    DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "auto-play: download started ch=%s msg=%lld",
               qPrintable(channelId), (long long)msg.id);
    if (!m_autoPlayTimer->isActive())
        m_autoPlayTimer->start(200);
}

void MainWindow::autoPlayTimerTick() {
    if (VoicePlayer::isPreparing() || SoundManager::instance()->isCurrentPcmPlaying())
        return;

    while (!m_autoPlayQueue.isEmpty()) {
        AutoPlayItem& item = m_autoPlayQueue.head();

        MessageRow msg = m_db->getMessageById(item.channelId, item.msgId);
        if (msg.id == 0) {
            DEBUG_WARN(DEBUG_CATEGORY_DEBUG, "auto-play: msg %lld not found in DB, removing from queue",
                       (long long)item.msgId);
            m_autoPlayQueue.dequeue();
            continue;
        }

        QJsonObject la = QJsonDocument::fromJson(msg.localAttrs).object();
        QString fp = la.value(QStringLiteral("fp")).toString();
        if (!fp.isEmpty()) {
            QString fullPath = autoPlayMediaDir() + QStringLiteral("/") + item.channelId
                               + QStringLiteral("/") + fp;
            if (QFile::exists(fullPath)) {
                QString chId = item.channelId;
                qint64 msgId = item.msgId;
                float dur = item.durationSec;
                m_autoPlayQueue.dequeue();
                m_autoPlayDownloading.remove(msgId);
                DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "auto-play: playing ch=%s msg=%lld file=%s dur=%.1fs",
                           qPrintable(chId), (long long)msgId, qPrintable(fullPath), (double)dur);
                MessageDelegate::stopAllAutoPlay();
                VoicePlayer::playOpusFile(fullPath, this, [fullPath](float actualDur) {
                    MessageDelegate::startAutoPlay(fullPath, actualDur);
                });
                return;
            }
        }

        if (!item.downloadStarted && !m_autoPlayDownloading.contains(item.msgId)) {
            struct attachment_dl_req* req = (struct attachment_dl_req*)
                u_malloc(sizeof(struct attachment_dl_req));
            if (!req) return;
            memset(req, 0, sizeof(*req));
            req->inst = gui_bridge_get_inst();
            strncpy(req->channel_id, item.channelId.toUtf8().constData(), sizeof(req->channel_id) - 1);
            req->msg_id = item.msgId;
            gui_bridge_post_uasync_fn(chat_core_attachment_download_trampoline, req);
            item.downloadStarted = true;
            m_autoPlayDownloading.insert(item.msgId);
            DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "auto-play: download started ch=%s msg=%lld (from queue)",
                       qPrintable(item.channelId), (long long)item.msgId);
        }
        return;
    }

    m_autoPlayTimer->stop();
}

void MainWindow::onAttachmentDownloadedForAutoPlay(const QString& chId, int64_t msgId) {
    (void)chId;
    if (m_autoPlayDownloading.remove((qint64)msgId) == 0 && m_autoPlayQueue.isEmpty())
        return;
    if (!m_autoPlayTimer->isActive())
        m_autoPlayTimer->start(200);
    if (!SoundManager::instance()->isCurrentPcmPlaying())
        autoPlayTimerTick();
}