#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"

QString AccountList::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 "?";
}

QString AccountList::relativeTimeStr(qint64 timestamp) {
    if (timestamp <= 0) return "";
    qint64 diff = QDateTime::currentSecsSinceEpoch() - timestamp;
    if (diff < 0) diff = 0;
    if (diff < 60)  return QString("%1s").arg(diff);
    if (diff < 3600) return QString("%1m").arg(diff / 60);
    if (diff < 86400) return QString("%1h").arg(diff / 3600);
    return QString("%1d").arg(diff / 86400);
}

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 QTextEdit(this);
    m_detailText->setReadOnly(true);
    m_detailText->setFont(QFont("monospace", 10));
    m_detailText->setStyleSheet(
        "QTextEdit { 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);
    connect(m_listView, &QListView::doubleClicked, this, &AccountList::onMemberDoubleClicked);

    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);

    m_detailTimer = new QTimer(this);
    m_detailTimer->setInterval(5000);
    connect(m_detailTimer, &QTimer::timeout, this, &AccountList::onDetailTimerTick);
}

void AccountList::setChannel(const QString& channelId) {
    m_channelId = channelId;
    m_model->setChannel(channelId);
    m_detailTimer->stop();
    m_detailNodeId = 0;
    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;

    m_detailTimer->stop();
    m_detailNodeId = nodeId;
    m_detailName.clear();
    m_detailOnline = false;
    m_detailLastSeen = 0;
    m_detailCreated = 0;
    m_detailAddrs.clear();

    sqlite3* d = m_db->m_db;
    sqlite3_stmt* st = nullptr;
    if (sqlite3_prepare_v2(d,
            "SELECT name, online, last_seen_at, created_at FROM nodes WHERE node_id=?",
            -1, &st, nullptr) == SQLITE_OK) {
        sqlite3_bind_int64(st, 1, (sqlite3_int64)nodeId);
        if (sqlite3_step(st) == SQLITE_ROW) {
            m_detailName = DbManager::colText(st, 0);
            m_detailOnline = sqlite3_column_int(st, 1) != 0;
            m_detailLastSeen = sqlite3_column_int64(st, 2);
            m_detailCreated = sqlite3_column_int64(st, 3);
        }
        sqlite3_finalize(st);
    }

    if (m_detailName.isEmpty())
        m_detailName = QString("0x%1").arg(nodeId, 8, 16, QChar('0')).right(4).toUpper();

    sqlite3_stmt* na = nullptr;
    sqlite3_prepare_v2(d,
        "SELECT family, protocol, address, port FROM node_addresses WHERE node_id=? ORDER BY family, port",
        -1, &na, nullptr);
    if (na) {
        sqlite3_bind_int64(na, 1, (sqlite3_int64)nodeId);
        while (sqlite3_step(na) == SQLITE_ROW) {
            DetailAddress a;
            a.family   = sqlite3_column_int(na, 0);
            a.protocol = sqlite3_column_int(na, 1);
            const void* adr = sqlite3_column_blob(na, 2);
            int sz = sqlite3_column_bytes(na, 2);
            if (adr && sz > 0) a.addr = QByteArray((const char*)adr, sz);
            a.port = sqlite3_column_int(na, 3);
            if (!a.addr.isEmpty()) m_detailAddrs.append(a);
        }
        sqlite3_finalize(na);
    }

    m_detailTimer->start();
    updateDetailDisplay();
}

void AccountList::updateDetailDisplay() {
    QStringList lines;

    lines.append(QString("ID:0x%1").arg(m_detailNodeId, 16, 16, QChar('0')));

    QString dotColor = m_detailOnline ? "#4CAF50" : "#9E9E9E";
    lines.append(QString("<span style='color:%1;'>●</span> %2")
                 .arg(dotColor, m_detailName.toHtmlEscaped()));

    if (m_detailLastSeen > 0)
        lines.append(QString("⌛ %1").arg(relativeTimeStr(m_detailLastSeen)));

    if (m_detailCreated > 0)
        lines.append(QString("📅 %1").arg(relativeTimeStr(m_detailCreated)));

    for (const auto& a : m_detailAddrs) {
        QString proto;
        switch (a.protocol) { case 1: proto = "UDP"; break; case 2: proto = "TCP"; break; default: proto = "UDP/TCP"; break; }
        lines.append(QString("%1:%2:%3").arg(proto, addrStr(a.addr.constData(), a.family)).arg(a.port));
    }

    m_detailText->setHtml(lines.join("<br>"));
}

void AccountList::onDetailTimerTick() {
    if (m_detailNodeId != 0) updateDetailDisplay();
}

void AccountList::onMemberDoubleClicked(const QModelIndex& index) {
    if (!index.isValid()) return;
    quint64 nodeId = m_model->nodeIdAt(index.row());
    if (!nodeId) return;
    QString name = m_model->data(index, Qt::DisplayRole).toString();
    MemberPropsDialog dlg(m_db, m_channelId, nodeId, name, this);
    dlg.exec();
}

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();
}