#include "callwindow.h"
#include "../transport/gui_bridge.h"
#include "call_audio_engine.h"
#include "sound_manager.h"

#include <QVBoxLayout>
#include <QHBoxLayout>
#include <QLabel>
#include <QPushButton>
#include <QComboBox>
#include <QTimer>
#include <QDateTime>
#include <QCloseEvent>
#include <QPainter>
#include <QPainterPath>
#include <cstring>

extern "C" {
#include "call/call.h"
#include "../../lib/mem.h"
#include "../../lib/debug_config.h"
}

/* ── рисование иконок звонка (QPainter, без внешних ассетов) ── */

enum class Glyph { Phone, PhoneDown, Mic, MicOff };

static QColor colorForName(const QString& name) {
    static const QColor palette[] = {
        QColor("#5B9BD5"), QColor("#70AD47"), QColor("#ED7D31"),
        QColor("#9B59B6"), QColor("#F4B400"), QColor("#E67E22"),
        QColor("#16A085"), QColor("#D35400"),
    };
    quint32 h = 0;
    for (const QChar c : name) h = h * 31u + c.unicode();
    return palette[h % 8];
}

static QPixmap makeAvatar(const QString& name, int size) {
    QPixmap pm(size, size);
    pm.fill(Qt::transparent);
    QPainter p(&pm);
    p.setRenderHint(QPainter::Antialiasing);
    p.setBrush(colorForName(name));
    p.setPen(Qt::NoPen);
    p.drawEllipse(0, 0, size, size);
    QString initial = name.trimmed().isEmpty() ? QStringLiteral("?") : name.trimmed().left(1).toUpper();
    p.setPen(Qt::white);
    QFont f = p.font();
    f.setBold(true);
    f.setPixelSize(size / 2);
    p.setFont(f);
    p.drawText(QRect(0, 0, size, size), Qt::AlignCenter, initial);
    p.end();
    return pm;
}

static void drawPhoneGlyph(QPainter* p, const QRectF& r, bool down) {
    const qreal s = r.width();
    p->save();
    p->translate(r.center());
    p->rotate(down ? 135.0 : -45.0);
    const qreal w = s * 0.36, h = s * 0.64;
    QPainterPath path;
    path.addRoundedRect(QRectF(-w / 2, -h / 2, w, h), w * 0.5, w * 0.5);
    p->setPen(Qt::NoPen);
    p->setBrush(Qt::white);
    p->drawPath(path);
    p->restore();
}

static void drawMicGlyph(QPainter* p, const QRectF& r, bool off) {
    const qreal s = r.width();
    const QPointF c = r.center();
    p->save();
    QPen pen(Qt::white, s * 0.09, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin);
    p->setPen(pen);
    p->setBrush(Qt::NoBrush);
    const qreal cw = s * 0.30;
    p->drawRoundedRect(QRectF(c.x() - cw / 2, r.top() + s * 0.10, cw, s * 0.40), cw / 2, cw / 2);
    p->drawArc(QRectF(c.x() - s * 0.20, r.top() + s * 0.42, s * 0.40, s * 0.26), 180 * 16, 180 * 16);
    p->drawLine(QPointF(c.x(), r.top() + s * 0.60), QPointF(c.x(), r.top() + s * 0.68));
    p->drawLine(QPointF(c.x() - s * 0.17, r.top() + s * 0.68), QPointF(c.x() + s * 0.17, r.top() + s * 0.68));
    if (off) {
        p->setPen(QPen(Qt::white, s * 0.09, Qt::SolidLine, Qt::RoundCap));
        p->drawLine(QPointF(c.x() - s * 0.26, c.y() - s * 0.26), QPointF(c.x() + s * 0.26, c.y() + s * 0.26));
    }
    p->restore();
}

static QIcon makeRoundIcon(const QColor& bg, Glyph glyph, int size) {
    QPixmap pm(size, size);
    pm.fill(Qt::transparent);
    QPainter p(&pm);
    p.setRenderHint(QPainter::Antialiasing);
    p.setPen(Qt::NoPen);
    p.setBrush(bg);
    p.drawEllipse(0, 0, size, size);
    const QRectF glyphRect(size * 0.24, size * 0.24, size * 0.52, size * 0.52);
    switch (glyph) {
    case Glyph::Phone:     drawPhoneGlyph(&p, glyphRect, false); break;
    case Glyph::PhoneDown: drawPhoneGlyph(&p, glyphRect, true);  break;
    case Glyph::Mic:       drawMicGlyph(&p, glyphRect, false);   break;
    case Glyph::MicOff:    drawMicGlyph(&p, glyphRect, true);    break;
    }
    p.end();
    return QIcon(pm);
}

static QPushButton* makeRoundBtn(const QIcon& icon, const QString& tooltip, QWidget* parent) {
    auto* btn = new QPushButton(parent);
    btn->setIcon(icon);
    btn->setIconSize(QSize(52, 52));
    btn->setFixedSize(64, 64);
    btn->setCursor(Qt::PointingHandCursor);
    btn->setToolTip(tooltip);
    btn->setStyleSheet(
        "QPushButton { border: none; border-radius: 32px; background: transparent; }"
        "QPushButton:pressed { background: rgba(255,255,255,0.15); }");
    return btn;
}

static QWidget* wrapWithCaption(QWidget* btn, const QString& caption, QLabel** captionOut = nullptr) {
    auto* w = new QWidget(btn->parentWidget());
    auto* l = new QVBoxLayout(w);
    l->setContentsMargins(0, 0, 0, 0);
    l->setSpacing(6);
    l->addWidget(btn, 0, Qt::AlignHCenter);
    auto* cap = new QLabel(caption, w);
    cap->setAlignment(Qt::AlignCenter);
    cap->setStyleSheet("color: palette(text); font-size: 11px; background: transparent;");
    l->addWidget(cap, 0, Qt::AlignHCenter);
    if (captionOut) *captionOut = cap;
    return w;
}

CallWindow::CallWindow(QWidget* parent)
    : QWidget(parent, Qt::Window) {
    setWindowTitle(QStringLiteral("Звонок"));
    setFixedSize(340, 400);
    setAttribute(Qt::WA_DeleteOnClose, false);

    m_avatarLabel = new QLabel(this);
    m_avatarLabel->setFixedSize(80, 80);
    m_avatarLabel->setAlignment(Qt::AlignCenter);

    m_peerLabel = new QLabel(this);
    m_peerLabel->setAlignment(Qt::AlignCenter);
    m_peerLabel->setStyleSheet("font-size: 17px; font-weight: bold; color: palette(text);");

    m_statusLabel = new QLabel(this);
    m_statusLabel->setAlignment(Qt::AlignCenter);
    m_statusLabel->setStyleSheet("color: gray; font-size: 13px;");

    m_durationLabel = new QLabel(QStringLiteral("00:00"), this);
    m_durationLabel->setAlignment(Qt::AlignCenter);
    m_durationLabel->setStyleSheet("font-size: 15px; color: palette(text); font-family: monospace;");

    m_bgpPathLabel = new QLabel(this);
    m_bgpPathLabel->setAlignment(Qt::AlignCenter);
    m_bgpPathLabel->setWordWrap(true);
    m_bgpPathLabel->setStyleSheet("color: gray; font-size: 11px;");
    m_bgpPathLabel->hide();

    m_acceptBtn = makeRoundBtn(makeRoundIcon(QColor("#27ae60"), Glyph::Phone, 96), QStringLiteral("Принять"), this);
    m_declineBtn = makeRoundBtn(makeRoundIcon(QColor("#e74c3c"), Glyph::PhoneDown, 96), QStringLiteral("Отклонить"), this);
    m_hangupBtn = makeRoundBtn(makeRoundIcon(QColor("#e74c3c"), Glyph::PhoneDown, 96), QStringLiteral("Завершить"), this);
    m_muteBtn = makeRoundBtn(makeRoundIcon(QColor("#7f8c8d"), Glyph::Mic, 96), QStringLiteral("Mute"), this);
    m_muteBtn->setCheckable(true);

    m_deviceCombo = new QComboBox(this);
    m_deviceCombo->setStyleSheet(
        "QComboBox { border: 1px solid palette(mid); border-radius: 4px;"
        " padding: 6px 10px; font-size: 13px; background: palette(base); }");

    QVBoxLayout* lay = new QVBoxLayout(this);
    lay->setContentsMargins(16, 20, 16, 16);
    lay->setSpacing(8);
    lay->addWidget(m_avatarLabel, 0, Qt::AlignHCenter);
    lay->addWidget(m_peerLabel);
    lay->addWidget(m_statusLabel);
    lay->addWidget(m_durationLabel);
    lay->addWidget(m_bgpPathLabel);
    lay->addStretch(1);

    m_acceptCell = wrapWithCaption(m_acceptBtn, QStringLiteral("Принять"));
    m_declineCell = wrapWithCaption(m_declineBtn, QStringLiteral("Отклонить"));
    m_hangupCell = wrapWithCaption(m_hangupBtn, QStringLiteral("Завершить"));
    m_muteCell = wrapWithCaption(m_muteBtn, QStringLiteral("Mute"), &m_muteCaption);

    QHBoxLayout* btn = new QHBoxLayout();
    btn->setSpacing(10);
    btn->addStretch(1);
    btn->addWidget(m_acceptCell);
    btn->addWidget(m_declineCell);
    btn->addWidget(m_hangupCell);
    btn->addWidget(m_muteCell);
    btn->addStretch(1);
    lay->addLayout(btn);
    lay->addStretch(1);
    lay->addWidget(m_deviceCombo);

    connect(m_acceptBtn, &QPushButton::clicked, this, &CallWindow::onAccept);
    connect(m_declineBtn, &QPushButton::clicked, this, &CallWindow::onDecline);
    connect(m_hangupBtn, &QPushButton::clicked, this, &CallWindow::onHangup);
    connect(m_muteBtn, &QPushButton::toggled, this, &CallWindow::onMuteToggled);
    connect(m_deviceCombo, QOverload<int>::of(&QComboBox::activated), this, &CallWindow::onDeviceChanged);

    m_durationTimer = new QTimer(this);
    m_durationTimer->setInterval(1000);
    connect(m_durationTimer, &QTimer::timeout, this, &CallWindow::updateDuration);

    setState(Outgoing);
}

CallWindow::~CallWindow() = default;

void CallWindow::setPeerName(const QString& name) {
    m_peerLabel->setText(name);
    m_avatarLabel->setPixmap(makeAvatar(name, 80));
}

void CallWindow::setBgpPath(const QString& path) {
    m_bgpPathLabel->setText(path);
    m_bgpPathLabel->setVisible(!path.isEmpty());
}

void CallWindow::setState(State s) {
    m_state = s;
    switch (s) {
    case Outgoing:
        m_statusLabel->setText(QStringLiteral("Звоним…"));
        m_durationLabel->hide();
        break;
    case Incoming:
        m_statusLabel->setText(QStringLiteral("Входящий звонок…"));
        m_durationLabel->hide();
        break;
    case Active:
        m_statusLabel->setText(QStringLiteral("Разговор"));
        m_durationLabel->setText(QStringLiteral("00:00"));
        m_durationLabel->show();
        m_startMs = QDateTime::currentMSecsSinceEpoch();
        m_durationTimer->start();
        populateDeviceCombo();
        m_muteBtn->setChecked(false);
        break;
    case Ended:
        m_statusLabel->setText(QStringLiteral("Завершён"));
        m_durationTimer->stop();
        break;
    }
    updateButtons();
}

void CallWindow::populateDeviceCombo() {
    m_deviceCombo->blockSignals(true);
    m_deviceCombo->clear();
    m_deviceCombo->addItem(QStringLiteral("Default (auto)"), -1);
    const auto devs = SoundManager::enumeratePlaybackDevices();
    for (int i = 0; i < devs.size(); i++) {
        QString label = devs[i].name;
        if (devs[i].isDefault) label += QStringLiteral(" (default)");
        m_deviceCombo->addItem(label, i);
    }
    int cur = CallAudioEngine::instance()->playbackDeviceIndex();
    for (int i = 0; i < m_deviceCombo->count(); i++) {
        if (m_deviceCombo->itemData(i).toInt() == cur) { m_deviceCombo->setCurrentIndex(i); break; }
    }
    m_deviceCombo->blockSignals(false);
}

void CallWindow::updateButtons() {
    m_acceptCell->setVisible(m_state == Incoming);
    m_declineCell->setVisible(m_state == Incoming);
    m_hangupCell->setVisible(m_state == Outgoing || m_state == Active);
    m_muteCell->setVisible(m_state == Active);
    m_deviceCombo->setVisible(m_state == Active);
}

void CallWindow::postCallFn(void (*fn)(void*), uint64_t callId) {
    struct call_id_arg* a = (struct call_id_arg*)u_malloc(sizeof(*a));
    if (!a) return;
    a->inst = gui_bridge_get_inst();
    a->call_id = callId;
    gui_bridge_post_uasync_fn(fn, a);
}

void CallWindow::onAccept() {
    setState(Active);
    postCallFn(call_accept_trampoline, m_callId);
}

void CallWindow::onDecline() {
    postCallFn(call_decline_trampoline, m_callId);
}

void CallWindow::onHangup() {
    postCallFn(call_hangup_trampoline, m_callId);
}

void CallWindow::onMuteToggled(bool checked) {
    CallAudioEngine::instance()->setMuted(checked);
    m_muteBtn->setIcon(makeRoundIcon(checked ? QColor("#e74c3c") : QColor("#7f8c8d"),
                                     checked ? Glyph::MicOff : Glyph::Mic, 96));
    if (m_muteCaption)
        m_muteCaption->setText(checked ? QStringLiteral("Вкл. микрофон") : QStringLiteral("Mute"));
}

void CallWindow::onDeviceChanged(int index) {
    int devIdx = m_deviceCombo->itemData(index).toInt();
    CallAudioEngine::instance()->setPlaybackDeviceIndex(devIdx);
}

void CallWindow::closeEvent(QCloseEvent* event) {
    if (m_state == Active) postCallFn(call_hangup_trampoline, m_callId);
    emit closed(m_callId);
    event->accept();
}

void CallWindow::updateDuration() {
    if (m_state != Active) return;
    qint64 ms = QDateTime::currentMSecsSinceEpoch() - m_startMs;
    qint64 s = ms / 1000;
    m_durationLabel->setText(QStringLiteral("%1:%2")
        .arg(s / 60, 2, 10, QChar('0'))
        .arg(s % 60, 2, 10, QChar('0')));
}