#include "accountlist.h"
#include "accountdelegate.h"
#include "memberlistmodel.h"
#include "memberpropsdialog.h"
#include "../db/db_manager.h"
#include <QVBoxLayout>
#include <QLabel>
#include <QDateTime>
#include <QFont>
#include "../../../lib/platform_compat.h"

static QString shortenKey(const QByteArray& key) {
    if (key.size() < 8) return key.toHex(' ').toUpper();
    return key.left(4).toHex(' ').toUpper() + ".." + key.right(4).toHex(' ').toUpper();
}

static QString addrStr(const void* addr, int family) {
    if (family == 4) {
        const uint8_t* a = (const uint8_t*)addr;
        return QString("%1.%2.%3.%4").arg(a[0]).arg(a[1]).arg(a[2]).arg(a[3]);
    }
    if (family == 6) {
        const uint16_t* a = (const uint16_t*)addr;
        return QString("%1:%2:%3:%4:%5:%6:%7:%8")
            .arg(ntohs(a[0]), 0, 16).arg(ntohs(a[1]), 0, 16)
            .arg(ntohs(a[2]), 0, 16).arg(ntohs(a[3]), 0, 16)
            .arg(ntohs(a[4]), 0, 16).arg(ntohs(a[5]), 0, 16)
            .arg(ntohs(a[6]), 0, 16).arg(ntohs(a[7]), 0, 16);
    }
    return "?";
}

static QString protoStr(int protocol) {
    switch (protocol) { case 1: return "UDP"; case 2: return "TCP"; case 3: return "UDP+TCP"; default: return QString::number(protocol); }
}
static QString addrTypeStr(int t) {
    switch (t) { case 0: return "NETIF"; case 1: return "DIRECT"; case 2: return "NAT_EIM"; case 3: return "NAT_STRICT"; default: return QString("?%1").arg(t); }
}

AccountList::AccountList(DbManager* db, QWidget *parent)
    : QWidget(parent)
    , m_listView(new QListView(this))
    , m_model(new MemberListModel(db, this))
    , m_db(db)
    , m_detailText(nullptr)
{
    auto *layout = new QVBoxLayout(this);
    layout->setContentsMargins(0, 0, 0, 0);
    layout->setSpacing(0);

    auto *header = new QLabel("Members", this);
    header->setAlignment(Qt::AlignCenter);
    header->setStyleSheet("font-weight: bold; padding: 8px; background: palette(window);");
    layout->addWidget(header);

    m_listView->setModel(m_model);
    m_listView->setItemDelegate(new AccountDelegate(m_listView));
    m_listView->setEditTriggers(QAbstractItemView::NoEditTriggers);
    m_listView->setSelectionMode(QAbstractItemView::SingleSelection);
    m_listView->setIconSize(QSize(24, 24));
    m_listView->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    m_listView->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel);
    m_listView->setContextMenuPolicy(Qt::CustomContextMenu);
    layout->addWidget(m_listView, 3);

    m_detailText = new QPlainTextEdit(this);
    m_detailText->setReadOnly(true);
    m_detailText->setFont(QFont("monospace", 9));
    m_detailText->setStyleSheet(
        "QPlainTextEdit { border-top: 1px solid palette(mid); border-bottom: none;"
        " border-left: none; border-right: none; padding: 6px; background: palette(base); }");
    m_detailText->setPlaceholderText("Select a member");
    layout->addWidget(m_detailText, 2);

    connect(m_listView, &QListView::clicked, this, &AccountList::onMemberClicked);

    m_refreshTimer = new QTimer(this);
    m_refreshTimer->start(2000);
    connect(m_refreshTimer, &QTimer::timeout, m_model, &MemberListModel::refreshRtt);

    connect(m_listView, &QWidget::customContextMenuRequested,
            this, &AccountList::onMemberContextMenu);
}

void AccountList::setChannel(const QString& channelId) {
    m_channelId = channelId;
    m_model->setChannel(channelId);
    m_detailText->clear();
}

void AccountList::refresh() { m_model->refresh(); }

void AccountList::onMemberClicked(const QModelIndex& index) {
    if (!index.isValid()) return;
    quint64 nodeId = m_model->nodeIdAt(index.row());
    if (nodeId) showMemberDetail(nodeId);
}

void AccountList::showMemberDetail(quint64 nodeId) {
    if (!m_db || !m_db->m_db) return;
    sqlite3* d = m_db->m_db;

    QString text;

    sqlite3_stmt* st = nullptr;
    if (sqlite3_prepare_v2(d,
            "SELECT node_id, name, online, x25519_pubkey, ed25519_pubkey,"
            " last_seen_at, created_at FROM nodes WHERE node_id=?",
            -1, &st, nullptr) != SQLITE_OK) { m_detailText->clear(); return; }
    sqlite3_bind_int64(st, 1, (sqlite3_int64)nodeId);

    if (sqlite3_step(st) == SQLITE_ROW) {
        QString name = DbManager::colText(st, 1);
        int online = sqlite3_column_int(st, 2);
        QByteArray x25 = DbManager::colBlob(st, 3);
        QByteArray ed  = DbManager::colBlob(st, 4);
        qint64 last_seen = sqlite3_column_int64(st, 5);
        qint64 created = sqlite3_column_int64(st, 6);

        text += QString("Node: 0x%1").arg(nodeId, 16, 16, QChar('0'));
        if (!name.isEmpty()) text += QString("   (%1)").arg(name);
        text += QString("\n  online: %1\n").arg(online ? "yes" : "no");
        text += QString("  x25519: %1\n").arg(x25.isEmpty() ? "-" : shortenKey(x25));
        text += QString("  ed25519: %1\n").arg(ed.isEmpty()  ? "-" : shortenKey(ed));
        if (last_seen > 0)
            text += QString("  last_seen: %1\n").arg(QDateTime::fromSecsSinceEpoch(last_seen).toString("yyyy-MM-dd hh:mm:ss"));
        if (created > 0)
            text += QString("  created: %1\n").arg(QDateTime::fromSecsSinceEpoch(created).toString("yyyy-MM-dd hh:mm:ss"));
    } else {
        text = QString("Node 0x%1 not found in database.").arg(nodeId, 16, 16, QChar('0'));
    }
    sqlite3_finalize(st);

    sqlite3_stmt* na = nullptr;
    sqlite3_prepare_v2(d,
        "SELECT family, protocol, address, port, rtt, addr_type"
        " FROM node_addresses WHERE node_id=? ORDER BY family, port",
        -1, &na, nullptr);
    if (na) {
        sqlite3_bind_int64(na, 1, (sqlite3_int64)nodeId);
        int ac = 0;
        while (sqlite3_step(na) == SQLITE_ROW) {
            if (ac == 0) text += "  addresses:\n";
            int family = sqlite3_column_int(na, 0);
            int proto  = sqlite3_column_int(na, 1);
            const void* addr = sqlite3_column_blob(na, 2);
            int addrSz = sqlite3_column_bytes(na, 2);
            int port = sqlite3_column_int(na, 3);
            int rtt = sqlite3_column_int(na, 4);
            int addrType = sqlite3_column_int(na, 5);

            if (addr && addrSz > 0)
                text += QString("    %1:%2  %3  %4  rtt=%5ms\n")
                    .arg(addrStr(addr, family))
                    .arg(port)
                    .arg(protoStr(proto))
                    .arg(addrTypeStr(addrType))
                    .arg(rtt > 0 ? QString::number(rtt) : "-");
            ac++;
        }
        if (ac == 0) text += "  addresses: none\n";
        sqlite3_finalize(na);
    }

    m_detailText->setPlainText(text);
}

void AccountList::onMemberContextMenu(const QPoint& pos) {
    QModelIndex index = m_listView->indexAt(pos);
    if (!index.isValid()) return;

    quint64 nodeId = m_model->nodeIdAt(index.row());
    if (!nodeId) return;

    QString name = m_model->data(index, Qt::DisplayRole).toString();

    QMenu menu(m_listView);
    QAction* editAction = menu.addAction("Edit");
    QAction* chosen = menu.exec(m_listView->viewport()->mapToGlobal(pos));
    if (chosen != editAction) return;

    MemberPropsDialog dlg(m_db, m_channelId, nodeId, name, this);
    dlg.exec();
}