/**
 * test_main_window.cpp — Tests for the GUI skeleton + LDF loading (C++).
 * Uses QTreeWidget instead of QTableWidget.
 */

#include <QtTest/QtTest>
#include <QDockWidget>
#include <QTreeWidget>
#include <QSpinBox>
#include <QLineEdit>
#include <QPushButton>
#include <QCheckBox>
#include <QComboBox>
#include <QLabel>
#include "main_window.h"

class TestMainWindow : public QObject
{
    Q_OBJECT

private:
    MainWindow* m_window;

private slots:
    void init() { m_window = new MainWindow(); }
    void cleanup() { delete m_window; m_window = nullptr; }

    // ─── Window Basics ────────────────────────────────────────────
    void test_windowTitle() { QCOMPARE(m_window->windowTitle(), QString("LIN Simulator")); }
    void test_minimumSize() { QVERIFY(m_window->minimumWidth() >= 1024); QVERIFY(m_window->minimumHeight() >= 768); }
    void test_centralWidgetExists() { QVERIFY(m_window->centralWidget() != nullptr); }

    // ─── Menu Bar ─────────────────────────────────────────────────
    void test_menuBarExists() { QVERIFY(m_window->menuBar() != nullptr); }
    void test_loadLdfActionExists() { QVERIFY(m_window->loadLdfAction() != nullptr); QCOMPARE(m_window->loadLdfAction()->text(), QString("&Load LDF...")); }
    void test_loadLdfShortcut() { QCOMPARE(m_window->loadLdfAction()->shortcut().toString(), QString("Ctrl+O")); }

    // ─── LDF Toolbar ──────────────────────────────────────────────
    void test_ldfPathFieldExists() { QVERIFY(m_window->ldfPathEdit() != nullptr); QVERIFY(m_window->ldfPathEdit()->isReadOnly()); }
    void test_ldfPathPlaceholder() { QCOMPARE(m_window->ldfPathEdit()->placeholderText(), QString("No LDF file loaded")); }
    void test_browseButtonExists() { QVERIFY(m_window->browseButton() != nullptr); }
    void test_autoReloadDefaultChecked() { QVERIFY(m_window->autoReloadCheck()->isChecked()); }
    void test_hexModeDefaultChecked() { QVERIFY(m_window->hexModeCheck()->isChecked()); }

    // ─── Tx Tree ──────────────────────────────────────────────────
    void test_txTableExists() { QVERIFY(qobject_cast<QTreeWidget*>(m_window->txTable()) != nullptr); }
    void test_txTableColumns()
    {
        QCOMPARE(m_window->txTable()->columnCount(), 6);
        QStringList expected = {"Name", "ID / Bit", "Length / Width", "Interval (ms)", "Value", "Action"};
        for (int i = 0; i < m_window->txTable()->columnCount(); ++i)
            QCOMPARE(m_window->txTable()->headerItem()->text(i), expected[i]);
    }
    void test_txTableAlternatingColors() { QVERIFY(m_window->txTable()->alternatingRowColors()); }
    void test_txTableIsDecorated() { QVERIFY(m_window->txTable()->rootIsDecorated()); }

    // ─── Rx Tree ──────────────────────────────────────────────────
    void test_rxTableExists() { QVERIFY(qobject_cast<QTreeWidget*>(m_window->rxTable()) != nullptr); }
    void test_rxTableColumns()
    {
        QCOMPARE(m_window->rxTable()->columnCount(), 5);
        QStringList expected = {"Timestamp", "Name", "ID / Bit", "Length / Width", "Value"};
        for (int i = 0; i < m_window->rxTable()->columnCount(); ++i)
            QCOMPARE(m_window->rxTable()->headerItem()->text(i), expected[i]);
    }
    void test_rxTableIsDecorated() { QVERIFY(m_window->rxTable()->rootIsDecorated()); }

    // ─── Connection Dock ──────────────────────────────────────────
    void test_dockExists() { auto docks = m_window->findChildren<QDockWidget*>(); QCOMPARE(docks.size(), 1); QCOMPARE(docks[0]->windowTitle(), QString("Connection")); }
    void test_deviceComboExists() { QVERIFY(m_window->deviceCombo() != nullptr); }
    void test_connectButtonExists() { QVERIFY(m_window->connectButton() != nullptr); QVERIFY(m_window->connectButton()->isEnabled()); }
    void test_disconnectButtonDisabledInitially() { QVERIFY(!m_window->disconnectButton()->isEnabled()); }
    void test_statusLabelShowsDisconnected() { QVERIFY(m_window->connStatusLabel()->text().contains("Disconnected")); }
    void test_baudRateLabelExists() { QVERIFY(m_window->baudRateLabel() != nullptr); }
    void test_baudRateShowsPlaceholderBeforeLdf() { QVERIFY(m_window->baudRateLabel()->text().contains("load LDF")); }

    // ─── Control Bar ──────────────────────────────────────────────
    void test_scheduleComboExists() { QVERIFY(m_window->scheduleCombo() != nullptr); }
    void test_schedulerButtonsDisabledInitially() { QVERIFY(!m_window->startButton()->isEnabled()); QVERIFY(!m_window->stopButton()->isEnabled()); QVERIFY(!m_window->pauseButton()->isEnabled()); }
    void test_manualSendDisabledInitially() { QVERIFY(!m_window->manualSendButton()->isEnabled()); }
    void test_globalRateSpinboxExists() { QVERIFY(m_window->globalRateSpin() != nullptr); }
    void test_globalRateDefault50ms() { QCOMPARE(m_window->globalRateSpin()->value(), 50); }
    void test_globalRateRange() { QCOMPARE(m_window->globalRateSpin()->minimum(), 1); QCOMPARE(m_window->globalRateSpin()->maximum(), 10000); }
    void test_globalRateSuffix() { QCOMPARE(m_window->globalRateSpin()->suffix(), QString(" ms")); }

    // ─── Status Bar ───────────────────────────────────────────────
    void test_statusBarExists() { QVERIFY(m_window->statusBar() != nullptr); }
    void test_connectionStatusLabel() { QVERIFY(m_window->statusConnectionLabel()->text().contains("Disconnected")); }
};

QTEST_MAIN(TestMainWindow)
#include "test_main_window.moc"