/**
 * test_ldf_loading.cpp — Tests for LDF loading GUI integration (C++).
 * Tests QTreeWidget population, hex/dec toggle, schedule combo.
 */

#include <QtTest/QtTest>
#include <QTreeWidget>
#include <QTreeWidgetItem>
#include <QCheckBox>
#include <QComboBox>
#include <QLabel>
#include <QLineEdit>
#include "main_window.h"

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

class TestLdfLoading : public QObject
{
    Q_OBJECT

private:
    MainWindow* m_window;
    QString m_samplePath;

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

    // ─── LDF Loading ──────────────────────────────────────────────
    void test_ldfPathShown() { QVERIFY(m_window->ldfPathEdit()->text().contains("sample.ldf")); }
    void test_baudRateUpdated() { QVERIFY(m_window->baudRateLabel()->text().contains("19200")); }
    void test_ldfDataStored() { QVERIFY(m_window->ldfData() != nullptr); QCOMPARE(m_window->ldfData()->baudrate, 19200); }

    // ─── Tx Tree Population ───────────────────────────────────────
    void test_txFrameCount() { QCOMPARE(m_window->txTable()->topLevelItemCount(), 2); }

    void test_txFrameNames()
    {
        QStringList names;
        for (int i = 0; i < m_window->txTable()->topLevelItemCount(); ++i)
            names << m_window->txTable()->topLevelItem(i)->text(0);
        QVERIFY(names.contains("Motor_Command"));
        QVERIFY(names.contains("Door_Command"));
    }

    void test_txFrameIds()
    {
        QStringList ids;
        for (int i = 0; i < m_window->txTable()->topLevelItemCount(); ++i)
            ids << m_window->txTable()->topLevelItem(i)->text(1);
        QVERIFY(ids.contains("0x10"));
        QVERIFY(ids.contains("0x11"));
    }

    void test_txFrameLengths()
    {
        for (int i = 0; i < m_window->txTable()->topLevelItemCount(); ++i)
            QCOMPARE(m_window->txTable()->topLevelItem(i)->text(2), QString("2"));
    }

    void test_txValueColumnShowsBytes()
    {
        for (int i = 0; i < m_window->txTable()->topLevelItemCount(); ++i)
            QCOMPARE(m_window->txTable()->topLevelItem(i)->text(4), QString("00 00"));
    }

    void test_txSignalsAsChildren()
    {
        auto* item = m_window->txTable()->topLevelItem(0);
        QVERIFY(item->childCount() >= 2);
    }

    void test_txSignalNames()
    {
        auto* item = m_window->txTable()->topLevelItem(0);
        QStringList names;
        for (int j = 0; j < item->childCount(); ++j)
            names << item->child(j)->text(0).trimmed();
        QString all = names.join(" ");
        QVERIFY(all.contains("Motor") || all.contains("Door"));
    }

    void test_txIntervalFromSchedule()
    {
        QStringList intervals;
        for (int i = 0; i < m_window->txTable()->topLevelItemCount(); ++i)
            intervals << m_window->txTable()->topLevelItem(i)->text(3);
        QVERIFY(intervals.contains("10"));
    }

    // ─── Rx Tree Population ───────────────────────────────────────
    void test_rxFrameCount() { QCOMPARE(m_window->rxTable()->topLevelItemCount(), 2); }

    void test_rxFrameNames()
    {
        QStringList names;
        for (int i = 0; i < m_window->rxTable()->topLevelItemCount(); ++i)
            names << m_window->rxTable()->topLevelItem(i)->text(1);
        QVERIFY(names.contains("Motor_Status"));
        QVERIFY(names.contains("Door_Status"));
    }

    void test_rxFrameIds()
    {
        QStringList ids;
        for (int i = 0; i < m_window->rxTable()->topLevelItemCount(); ++i)
            ids << m_window->rxTable()->topLevelItem(i)->text(2);
        QVERIFY(ids.contains("0x20"));
        QVERIFY(ids.contains("0x21"));
    }

    void test_rxTimestampPlaceholder()
    {
        for (int i = 0; i < m_window->rxTable()->topLevelItemCount(); ++i)
            QCOMPARE(m_window->rxTable()->topLevelItem(i)->text(0), QString::fromUtf8("—"));
    }

    void test_rxSignalsAsChildren()
    {
        auto* item = m_window->rxTable()->topLevelItem(0);
        QVERIFY(item->childCount() >= 1);
    }

    // ─── Schedule Combo ───────────────────────────────────────────
    void test_scheduleCount() { QCOMPARE(m_window->scheduleCombo()->count(), 2); }
    void test_scheduleNames()
    {
        QStringList items;
        for (int i = 0; i < m_window->scheduleCombo()->count(); ++i)
            items << m_window->scheduleCombo()->itemText(i);
        QVERIFY(items.contains("NormalSchedule"));
        QVERIFY(items.contains("FastSchedule"));
    }

    // ─── Hex/Dec Toggle ───────────────────────────────────────────
    void test_hexModeDefault() { QVERIFY(m_window->hexModeCheck()->isChecked()); }

    void test_signalValueHexFormat()
    {
        auto* item = m_window->txTable()->topLevelItem(0);
        auto* sig = item->child(0);
        QVERIFY(sig->text(4).startsWith("0x"));
    }

    void test_signalValueDecFormat()
    {
        m_window->hexModeCheck()->setChecked(false);
        auto* item = m_window->txTable()->topLevelItem(0);
        auto* sig = item->child(0);
        QVERIFY(!sig->text(4).startsWith("0x"));
        m_window->hexModeCheck()->setChecked(true);
    }

    void test_frameValueHexFormat()
    {
        auto* item = m_window->txTable()->topLevelItem(0);
        QString val = item->text(4);
        QStringList parts = val.split(' ');
        for (const auto& p : parts)
            QCOMPARE(p.length(), 2);
    }

    // ─── Error Handling ───────────────────────────────────────────
    void test_reloadClearsPrevious()
    {
        QCOMPARE(m_window->txTable()->topLevelItemCount(), 2);
        m_window->loadLdfFile(m_samplePath);
        QCOMPARE(m_window->txTable()->topLevelItemCount(), 2);
    }

    // ─── Auto-reload ──────────────────────────────────────────────
    void test_autoReloadCheckboxControlsReload()
    {
        m_window->autoReloadCheck()->setChecked(false);
        m_window->onLdfFileChanged(m_samplePath);
        QVERIFY(m_window->ldfData() != nullptr);
    }
};

QTEST_MAIN(TestLdfLoading)
#include "test_ldf_loading.moc"