#include "memberpropsdialog.h"
#include "../db/db_manager.h"
#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QPushButton>
#include <QLabel>
#include <QMessageBox>

#include <openssl/evp.h>
#include "../../../lib/platform_compat.h"

MemberPropsDialog::MemberPropsDialog(DbManager* db, const QString& channelId,
                                       quint64 nodeId, const QString& memberName,
                                       QWidget* parent)
    : QDialog(parent)
    , m_db(db)
    , m_channelId(channelId)
    , m_nodeId(nodeId)
{
    setWindowTitle("Member Properties");
    setMinimumWidth(340);
    setModal(true);

    auto chs = m_db->getChannels();
    for (const auto& ch : chs) {
        if (ch.channelId == channelId) {
            m_edPrivkey = ch.ed25519_privkey;
            break;
        }
    }
    bool haveKey = (m_edPrivkey.size() == 32);
    bool isOwn = (m_nodeId == m_db->myNodeId());

    bool isAdmin = false, isSuper = false;
    QString curNick;
    if (m_db->m_db) {
        QString tbl = m_db->peersTableName(channelId);
        QByteArray sql = QString(
            "SELECT adm_tags, local_nick FROM \"%1\" WHERE node_id=?"
        ).arg(tbl).toUtf8();
        sqlite3_stmt* st = nullptr;
        if (sqlite3_prepare_v2(m_db->m_db, sql.constData(), -1, &st, nullptr) == SQLITE_OK) {
            sqlite3_bind_int64(st, 1, (sqlite3_int64)nodeId);
            if (sqlite3_step(st) == SQLITE_ROW) {
                const char* tags = (const char*)sqlite3_column_text(st, 0);
                if (tags) {
                    if (strstr(tags, "admin=yes")) isAdmin = true;
                    if (strstr(tags, "supernode=yes")) isSuper = true;
                }
                curNick = DbManager::colText(st, 1);
            }
            sqlite3_finalize(st);
        }
        QByteArray alt = QString(
            "ALTER TABLE \"%1\" ADD COLUMN adm_tags TEXT"
        ).arg(tbl).toUtf8();
        sqlite3_exec(m_db->m_db, alt.constData(), nullptr, nullptr, nullptr);
        alt = QString(
            "ALTER TABLE \"%1\" ADD COLUMN adm_tags_sig BLOB"
        ).arg(tbl).toUtf8();
        sqlite3_exec(m_db->m_db, alt.constData(), nullptr, nullptr, nullptr);
        alt = QString(
            "ALTER TABLE \"%1\" ADD COLUMN local_nick TEXT"
        ).arg(tbl).toUtf8();
        sqlite3_exec(m_db->m_db, alt.constData(), nullptr, nullptr, nullptr);
    }

    auto* layout = new QVBoxLayout(this);
    layout->setSpacing(12);
    layout->setContentsMargins(20, 16, 20, 16);

    auto* title = new QLabel(
        QString("Node: 0x%1").arg(nodeId, 16, 16, QChar('0')) +
        (memberName.isEmpty() ? "" : QString(" (%1)").arg(memberName)),
        this);
    title->setStyleSheet("font-weight: bold; font-size: 13px;");
    layout->addWidget(title);

    m_nickEdit = new QLineEdit(this);
    m_nickEdit->setPlaceholderText("Local nickname...");
    m_nickEdit->setText(curNick);
    m_nickEdit->setEnabled(!isOwn);
    layout->addWidget(m_nickEdit);

    m_adminCb = new QCheckBox("Admin", this);
    m_adminCb->setChecked(isAdmin);
    m_adminCb->setEnabled(haveKey);
    layout->addWidget(m_adminCb);

    m_superCb = new QCheckBox("Supernode", this);
    m_superCb->setChecked(isSuper);
    m_superCb->setEnabled(haveKey);
    layout->addWidget(m_superCb);

    if (!haveKey) {
        auto* hint = new QLabel("(Admin/Super require channel private key)", this);
        hint->setStyleSheet("color: gray; font-size: 11px;");
        layout->addWidget(hint);
    }

    layout->addStretch();

    auto* btnLayout = new QHBoxLayout();
    btnLayout->addStretch();

    auto* cancelBtn = new QPushButton("Cancel", this);
    cancelBtn->setFixedWidth(90);
    cancelBtn->setStyleSheet(
        "QPushButton { border: 1px solid palette(mid); border-radius: 4px;"
        " padding: 6px 16px; font-size: 13px; background: palette(button); }"
        "QPushButton:hover { background: palette(light); }");
    connect(cancelBtn, &QPushButton::clicked, this, &QDialog::reject);
    btnLayout->addWidget(cancelBtn);

    auto* saveBtn = new QPushButton("Save", this);
    saveBtn->setFixedWidth(90);
    saveBtn->setDefault(true);
    saveBtn->setStyleSheet(
        "QPushButton { border: none; border-radius: 4px;"
        " padding: 6px 16px; font-size: 13px; font-weight: bold;"
        " background: #3390EC; color: white; }"
        "QPushButton:hover { background: #2B7ED4; }"
        "QPushButton:disabled { background: palette(mid); color: palette(midlight); }");
    connect(saveBtn, &QPushButton::clicked, this, &MemberPropsDialog::onSave);
    btnLayout->addWidget(saveBtn);

    layout->addLayout(btnLayout);
}

void MemberPropsDialog::onSave() {
    if (!m_db->m_db) return;
    QString tbl = m_db->peersTableName(m_channelId);

    /* local_nick — always save (unsigned, local only) */
    QString nick = m_nickEdit->text().trimmed();
    QByteArray nickSql = QString(
        "UPDATE \"%1\" SET local_nick=? WHERE node_id=?"
    ).arg(tbl).toUtf8();
    sqlite3_stmt* ns = nullptr;
    if (sqlite3_prepare_v2(m_db->m_db, nickSql.constData(), -1, &ns, nullptr) == SQLITE_OK) {
        sqlite3_bind_text(ns, 1, nick.isEmpty() ? nullptr : nick.toUtf8().constData(),
                          -1, nick.isEmpty() ? SQLITE_STATIC : SQLITE_TRANSIENT);
        sqlite3_bind_int64(ns, 2, (sqlite3_int64)m_nodeId);
        sqlite3_step(ns);
        sqlite3_finalize(ns);
    }

    /* signed fields — only if key available */
    if (m_edPrivkey.size() != 32) { accept(); return; }

    QString tags;
    if (m_adminCb->isChecked()) tags += "admin=yes";
    if (m_superCb->isChecked()) {
        if (!tags.isEmpty()) tags += ",";
        tags += "supernode=yes";
    }

    QByteArray msg = tags.toUtf8();
    uint64_t le = htole64(m_nodeId);
    msg.append((const char*)&le, 8);

    uint8_t sig[64] = {};
    EVP_PKEY* pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_ED25519, nullptr,
        (const uint8_t*)m_edPrivkey.constData(), 32);
    if (pkey) {
        EVP_MD_CTX* mdctx = EVP_MD_CTX_new();
        if (mdctx) {
            size_t siglen = 64;
            if (EVP_DigestSignInit(mdctx, nullptr, nullptr, nullptr, pkey) == 1)
                EVP_DigestSign(mdctx, sig, &siglen, (const uint8_t*)msg.constData(), msg.size());
            EVP_MD_CTX_free(mdctx);
        }
        EVP_PKEY_free(pkey);
    }

    QByteArray sql = QString(
        "UPDATE \"%1\" SET adm_tags=?, adm_tags_sig=?, node_type=? WHERE node_id=?"
    ).arg(tbl).toUtf8();
    sqlite3_stmt* st = nullptr;
    if (sqlite3_prepare_v2(m_db->m_db, sql.constData(), -1, &st, nullptr) == SQLITE_OK) {
        sqlite3_bind_text(st, 1, tags.isEmpty() ? nullptr : tags.toUtf8().constData(),
                          -1, tags.isEmpty() ? SQLITE_STATIC : SQLITE_TRANSIENT);
        sqlite3_bind_blob(st, 2, sig, 64, SQLITE_TRANSIENT);
        int nt = m_superCb->isChecked() ? 4 : 1;
        sqlite3_bind_int(st, 3, nt);
        sqlite3_bind_int64(st, 4, (sqlite3_int64)m_nodeId);
        sqlite3_step(st);
        sqlite3_finalize(st);
    }

    accept();
}