/**
 * test_rx_realtime.cpp — Tests for Step 4: Rx panel real-time display.
 */

#include <QtTest/QtTest>
#include <QTreeWidget>
#include <QTreeWidgetItem>
#include <QCheckBox>
#include <QPushButton>
#include "main_window.h"

#ifndef LDF_SAMPLE_PATH
#error "LDF_SAMPLE_PATH must be defined by CMake"
#endif

class TestRxRealtime : public QObject
{
    Q_OBJECT

private:
    MainWindow* m_window;

private slots:
    void init()
    {
        m_window = new MainWindow();
        m_window->loadLdfFile(QString(LDF_SAMPLE_PATH));
    }
    void cleanup() { delete m_window; m_window = nullptr; }

    // ─── Frame Reception ──────────────────────────────────────────

    void test_timestampUpdates()
    {
        m_window->receiveRxFrame(0x20, {0x03, 0xC8});
        auto* item = m_window->rxTable()->topLevelItem(0);
        QString ts = item->text(0);
        QVERIFY(ts != QString::fromUtf8("—"));
        QVERIFY(ts.contains(":"));
    }

    void test_frameBytesStored()
    {
        m_window->receiveRxFrame(0x20, {0x03, 0xC8});
        auto* item = m_window->rxTable()->topLevelItem(0);
        QVariantList bytes = item->data(4, Qt::UserRole).toList();
        QCOMPARE(bytes[0].toInt(), 0x03);
        QCOMPARE(bytes[1].toInt(), 0xC8);
    }

    void test_frameValueDisplayed()
    {
        m_window->receiveRxFrame(0x20, {0x03, 0xC8});
        auto* item = m_window->rxTable()->topLevelItem(0);
        QVERIFY(item->text(4).contains("C8"));
    }

    void test_signalValuesUnpacked()
    {
        // Motor_Status: MotorStatus (bit 0, w2), MotorTemp (bit 8, w8)
        m_window->receiveRxFrame(0x20, {0x03, 0xC8});
        auto* item = m_window->rxTable()->topLevelItem(0);
        QCOMPARE(item->child(0)->data(4, Qt::UserRole).toInt(), 3);   // MotorStatus
        QCOMPARE(item->child(1)->data(4, Qt::UserRole).toInt(), 200); // MotorTemp
    }

    void test_unknownFrameIdIgnored()
    {
        m_window->receiveRxFrame(0xFF, {0x00});
        // No crash
    }

    void test_updateSameFrameTwice()
    {
        m_window->receiveRxFrame(0x20, {0x01, 0x10});
        m_window->receiveRxFrame(0x20, {0x02, 0x20});
        auto* item = m_window->rxTable()->topLevelItem(0);
        QVariantList bytes = item->data(4, Qt::UserRole).toList();
        QCOMPARE(bytes[0].toInt(), 0x02);
        QCOMPARE(bytes[1].toInt(), 0x20);
    }

    // ─── Change Highlighting ──────────────────────────────────────

    void test_changedSignalHighlighted()
    {
        m_window->receiveRxFrame(0x20, {0x01, 0x10});
        m_window->receiveRxFrame(0x20, {0x01, 0x20});
        auto* tempSig = m_window->rxTable()->topLevelItem(0)->child(1);
        QColor bg = tempSig->background(4).color();
        QCOMPARE(bg.red(), 255);
        QCOMPARE(bg.green(), 255);
    }

    void test_unchangedSignalNotHighlighted()
    {
        m_window->receiveRxFrame(0x20, {0x01, 0x10});
        m_window->receiveRxFrame(0x20, {0x01, 0x20});
        auto* statusSig = m_window->rxTable()->topLevelItem(0)->child(0);
        QCOMPARE(statusSig->background(4).style(), Qt::NoBrush);
    }

    void test_firstReceptionNoHighlight()
    {
        m_window->receiveRxFrame(0x20, {0x01, 0x10});
        auto* item = m_window->rxTable()->topLevelItem(0);
        for (int j = 0; j < item->childCount(); ++j)
            QCOMPARE(item->child(j)->background(4).style(), Qt::NoBrush);
    }

    // ─── Auto-scroll ─────────────────────────────────────────────

    void test_autoScrollDefaultOn()
    {
        QVERIFY(m_window->autoScrollCheck()->isChecked());
    }

    void test_autoScrollCanBeDisabled()
    {
        m_window->autoScrollCheck()->setChecked(false);
        QVERIFY(!m_window->autoScrollCheck()->isChecked());
    }

    // ─── Clear ───────────────────────────────────────────────────

    void test_clearResetsTimestamps()
    {
        m_window->receiveRxFrame(0x20, {0x01, 0x10});
        m_window->onClearRx();
        for (int i = 0; i < m_window->rxTable()->topLevelItemCount(); ++i)
            QCOMPARE(m_window->rxTable()->topLevelItem(i)->text(0), QString::fromUtf8("—"));
    }

    void test_clearResetsValues()
    {
        m_window->receiveRxFrame(0x20, {0x01, 0x10});
        m_window->onClearRx();
        for (int i = 0; i < m_window->rxTable()->topLevelItemCount(); ++i)
            QCOMPARE(m_window->rxTable()->topLevelItem(i)->text(4), QString::fromUtf8("—"));
    }

    void test_clearResetsHighlights()
    {
        m_window->receiveRxFrame(0x20, {0x01, 0x10});
        m_window->receiveRxFrame(0x20, {0x02, 0x20});
        m_window->onClearRx();
        auto* item = m_window->rxTable()->topLevelItem(0);
        for (int j = 0; j < item->childCount(); ++j)
            QCOMPARE(item->child(j)->background(4).style(), Qt::NoBrush);
    }

    // ─── Hex/Dec ─────────────────────────────────────────────────

    void test_rxHexMode()
    {
        m_window->receiveRxFrame(0x20, {0x03, 0xC8});
        auto* item = m_window->rxTable()->topLevelItem(0);
        QVERIFY(item->text(4).contains("C8"));
        QVERIFY(item->child(1)->text(4).startsWith("0x"));
    }

    void test_rxDecMode()
    {
        m_window->hexModeCheck()->setChecked(false);
        m_window->receiveRxFrame(0x20, {0x03, 0xC8});
        auto* item = m_window->rxTable()->topLevelItem(0);
        QVERIFY(item->text(4).contains("200"));
        QVERIFY(!item->child(1)->text(4).startsWith("0x"));
        m_window->hexModeCheck()->setChecked(true);
    }
};

QTEST_MAIN(TestRxRealtime)
#include "test_rx_realtime.moc"