#include "accountdelegate.h"
#include "flagpainter.h"
#include "memberlistmodel.h"
#include "debug_ui.h"
#include <QPainter>
#include <QFont>
#include <QMouseEvent>
#include <QHelpEvent>
#include <QToolTip>
#include <QPainterPath>
#include <QCoreApplication>
#include <QAbstractItemView>

extern "C" {
#include "chat/chat_member.h"
}

QRect AccountDelegate::actionRect(const QRect& row, Action action) {
    const int offset = action == Action::RadioMute ? 95 : action == Action::RadioCall ? 63 : 31;
    return QRect(row.right() - offset, row.center().y() - 14, 28, 28);
}

/* Трубка в той же системе координат 24×24, что и портативная рация. */
static void drawCallButton(QPainter* painter, const QRect& button, const QColor& color) {
    painter->save();
    painter->setRenderHint(QPainter::Antialiasing);
    painter->translate(button.center().x() - 12, button.center().y() - 12);
    QPainterPath phone;
    phone.moveTo(6.6, 10.8); phone.cubicTo(8.1, 13.6, 10.4, 15.9, 13.2, 17.4);
    phone.lineTo(15.4, 15.2); phone.quadTo(15.8, 14.8, 16.3, 15);
    phone.quadTo(18.1, 15.6, 20, 15.6); phone.quadTo(21, 15.6, 21, 16.6);
    phone.lineTo(21, 20); phone.quadTo(21, 21, 20, 21);
    phone.cubicTo(10.6, 21, 3, 13.4, 3, 4); phone.quadTo(3, 3, 4, 3);
    phone.lineTo(7.4, 3); phone.quadTo(8.4, 3, 8.4, 4);
    phone.quadTo(8.4, 5.9, 9, 7.7); phone.quadTo(9.2, 8.2, 8.8, 8.6);
    phone.closeSubpath();
    painter->fillPath(phone, color);
    painter->restore();
}

// Волны показывают передачу независимо от локального mute; перечёркивание сохраняется при речи.
static void drawRadioMuteButton(QPainter* painter, const QRect& button, bool muted, bool speaking) {
    painter->save();
    painter->setRenderHint(QPainter::Antialiasing);
    painter->translate(button.center());
    QColor color(muted ? "#EF5350" : speaking ? "#4CAF50" : "#9E9E9E");
    QPainterPath speaker;
    speaker.moveTo(-8, -3); speaker.lineTo(-4, -3); speaker.lineTo(1, -7);
    speaker.lineTo(1, 7); speaker.lineTo(-4, 3); speaker.lineTo(-8, 3); speaker.closeSubpath();
    painter->fillPath(speaker, color);
    painter->setPen(QPen(color, 1.8, Qt::SolidLine, Qt::RoundCap)); painter->setBrush(Qt::NoBrush);
    if (muted) painter->drawLine(QPointF(-10, 10), QPointF(10, -10));
    if (speaking) {
        painter->drawArc(QRectF(-3, -5, 10, 10), -60 * 16, 120 * 16);
        painter->drawArc(QRectF(-6, -8, 16, 16), -60 * 16, 120 * 16);
    }
    painter->restore();
}

static QRect avatarRect(const QRect& row) {
    const int size = MemberListModel::kAvatarSize;
    return QRect(row.left() + 4, row.top() + (row.height() - size) / 2, size, size);
}

AccountDelegate::Action AccountDelegate::actionAt(const QPoint& position, const QRect& row, bool self) {
    if (avatarRect(row).contains(position)) return Action::Avatar;
    if (!self) for (Action action : {Action::RadioMute, Action::RadioCall, Action::Call})
        if (actionRect(row, action).contains(position)) return action;
    return Action::None;
}

AccountDelegate::AccountDelegate(QObject *parent)
    : QStyledItemDelegate(parent) {
    GUI_DEBUG("AccountDelegate: row height=%dpx avatar=%dpx gap=%dpx", MemberListModel::kRowHeight,
        MemberListModel::kAvatarSize, MemberListModel::kRowHeight - MemberListModel::kAvatarSize);
}

void AccountDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
                             const QModelIndex &index) const {
    painter->save();

    if (option.state & QStyle::State_Selected)
        painter->fillRect(option.rect, option.palette.highlight());
    else if (option.state & QStyle::State_MouseOver)
        painter->fillRect(option.rect, option.palette.alternateBase().color().lighter(115));
    else
        painter->fillRect(option.rect, option.palette.alternateBase());

    const int margin = 4;
    const int iconSz = MemberListModel::kAvatarSize;

    QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
    if (!icon.isNull())
        icon.paint(painter, avatarRect(option.rect));

    const int x = option.rect.left() + iconSz + margin * 3;
    const bool self = index.data(Qt::UserRole + 2).toBool();
    const int w = qMax(0, option.rect.right() - x - margin - (self ? 32 : 96));
    const int yMid = option.rect.top() + option.rect.height() / 2;

    uint8_t flags = (uint8_t)(index.data(Qt::UserRole + 3).toInt() & 0xFF);

    QFont nameFont = painter->font();
    nameFont.setBold(true);
    nameFont.setPixelSize(13);
    if (flags & MEMBER_FLAG_DELETED) nameFont.setStrikeOut(true);
    painter->setFont(nameFont);

    QColor textColor = option.palette.color(QPalette::Text);
    if (option.state & QStyle::State_Selected) textColor = option.palette.color(QPalette::HighlightedText);
    if (index.data(Qt::UserRole + 2).toBool()) textColor = QColor("#4CAF50");
    painter->setPen(textColor);

    painter->save();
    painter->setClipRect(QRect(x, option.rect.top(), w, option.rect.height()), Qt::IntersectClip);
    const uint8_t visualFlags = flags & (MEMBER_FLAG_SUPERNODE | MEMBER_FLAG_ADMIN | MEMBER_FLAG_MODER);
    int flagX = x;
    if (visualFlags) {
        FlagPainter::draw(painter, flags, flagX, option.rect.top() + (option.rect.height() - nameFont.pixelSize()) / 2, nameFont.pixelSize());
        int n = __builtin_popcount(visualFlags);
        flagX += nameFont.pixelSize() * n + (n - 1) * 2;
    }
    if (index.data(Qt::UserRole + 4).toBool()) {
        FlagPainter::drawStorage(painter, flagX, option.rect.top() + (option.rect.height() - nameFont.pixelSize()) / 2, nameFont.pixelSize());
        flagX += nameFont.pixelSize() + 2;
    }
    QString name = index.data(Qt::DisplayRole).toString();
    painter->drawText(QRect(flagX, option.rect.top() + 2, w - (flagX - x), yMid - option.rect.top() - 2),
                      Qt::AlignLeft | Qt::AlignBottom, name);

    QFont subFont = painter->font();
    subFont.setBold(false);
    subFont.setPixelSize(10);
    painter->setFont(subFont);
    painter->setPen(QColor(130, 130, 130));

    QString sub = index.data(Qt::UserRole + 1).toString();
    if (!sub.isEmpty())
        painter->drawText(QRect(flagX, yMid + 2, w - (flagX - x), option.rect.bottom() - yMid - 2),
                          Qt::AlignLeft | Qt::AlignTop, sub);

    painter->restore();
    drawRadioMuteButton(painter, actionRect(option.rect, self ? Action::Call : Action::RadioMute), flags & CHAT_MEMBER_FLAG_RADIO_MUTED,
                        index.data(MemberListModel::RadioSpeakingRole).toBool());
    if (!self) {
        const QColor color = index.data(MemberListModel::OnlineRole).toBool() ? textColor :
            option.palette.color(QPalette::Disabled, QPalette::Text);
        const QRect radio = actionRect(option.rect, Action::RadioCall);
        const QColor radioColor = flags & CHAT_MEMBER_FLAG_RADIO ? QColor("#4CAF50") : color;
        FlagPainter::drawRadio(painter, radio.center().x() - 12, radio.center().y() - 12, 24, radioColor);
        const bool known = index.data(MemberListModel::OnlineRole).toBool() && (flags & CHAT_MEMBER_FLAG_PHONE_KNOWN);
        const QColor phoneColor = known ? QColor(flags & CHAT_MEMBER_FLAG_PHONE_BUSY ? "#E53935" : "#4CAF50") : color;
        drawCallButton(painter, actionRect(option.rect, Action::Call), phoneColor);
    }
    painter->restore();
}

bool AccountDelegate::editorEvent(QEvent* event, QAbstractItemModel* model, const QStyleOptionViewItem& option,
                                  const QModelIndex& index) {
    Q_UNUSED(model);
    if (event->type() != QEvent::MouseButtonPress && event->type() != QEvent::MouseButtonRelease &&
        event->type() != QEvent::MouseButtonDblClick) return false;
    auto* mouse = static_cast<QMouseEvent*>(event);
    if (mouse->button() != Qt::LeftButton) return false;
    const Action action = actionAt(mouse->pos(), option.rect, index.data(Qt::UserRole + 2).toBool());
    const bool enabled = action == Action::Avatar || action == Action::RadioMute || index.data(MemberListModel::OnlineRole).toBool();
    if (event->type() == QEvent::MouseButtonPress) {
        m_pressedIndex = action != Action::None && enabled ? index : QModelIndex();
        m_pressedAction = action; m_pressedPosition = mouse->pos();
        return action != Action::None;
    }
    if (event->type() == QEvent::MouseButtonDblClick) return action != Action::None;
    const bool handled = action != Action::None || m_pressedIndex.isValid();
    const bool activate = enabled && action != Action::None && action == m_pressedAction && m_pressedIndex == index &&
        (mouse->pos() - m_pressedPosition).manhattanLength() < 5;
    m_pressedIndex = QPersistentModelIndex(); m_pressedAction = Action::None;
    if (activate) {
        if (action == Action::Avatar) emit avatarRequested(index);
        else if (action == Action::RadioMute) emit radioMuteRequested(index);
        else if (action == Action::RadioCall) emit radioCallRequested(index);
        else if (action == Action::Call) emit callRequested(index);
    }
    return handled;
}

bool AccountDelegate::helpEvent(QHelpEvent* event, QAbstractItemView* view, const QStyleOptionViewItem& option,
                                const QModelIndex& index) {
    const bool self = index.data(Qt::UserRole + 2).toBool();
    if (event && actionRect(option.rect, self ? Action::Call : Action::RadioMute).contains(event->pos())) {
        const bool muted = index.data(Qt::UserRole + 3).toInt() & CHAT_MEMBER_FLAG_RADIO_MUTED;
        const bool speaking = index.data(MemberListModel::RadioSpeakingRole).toBool();
        QString text = QCoreApplication::translate("ChatGui", speaking ? "Radio: speaking" : "Radio: silent");
        if (muted) text += " · " + QCoreApplication::translate("ChatGui", "Radio: muted");
        if (!index.data(Qt::UserRole + 2).toBool()) text += '\n' + QCoreApplication::translate("ChatGui",
            muted ? "Listen to this member in radio" : "Mute this member in radio");
        QToolTip::showText(event->globalPos(), text, view);
        return true;
    }
    if (event && !self) {
        const Action action = actionAt(event->pos(), option.rect, false);
        if (action == Action::RadioCall || action == Action::Call) {
            QString text = QCoreApplication::translate("ChatGui", action == Action::RadioCall ? "Call by radio" : "Call peer");
            if (action == Action::RadioCall && (index.data(Qt::UserRole + 3).toInt() & CHAT_MEMBER_FLAG_RADIO))
                text += QCoreApplication::translate("ChatGui", " · Radio enabled");
            if (action == Action::Call && index.data(MemberListModel::OnlineRole).toBool()) {
                const int flags = index.data(Qt::UserRole + 3).toInt();
                text += " · " + QCoreApplication::translate("ChatGui", !(flags & CHAT_MEMBER_FLAG_PHONE_KNOWN) ? "Phone status unknown" :
                    (flags & CHAT_MEMBER_FLAG_PHONE_BUSY) ? "Busy on a call" : "Phone is free");
            }
            if (!index.data(MemberListModel::OnlineRole).toBool()) text += " · " + QCoreApplication::translate("ChatGui", "offline");
            QToolTip::showText(event->globalPos(), text, view);
            return true;
        }
    }
    return QStyledItemDelegate::helpEvent(event, view, option, index);
}

QSize AccountDelegate::sizeHint(const QStyleOptionViewItem &option,
                                 const QModelIndex &index) const {
    (void)option; (void)index;
    return QSize(160, MemberListModel::kRowHeight);
}