#include <gtest/gtest.h>

#include <QApplication>
#include <QLabel>
#include <QSignalSpy>
#include <cstdlib>

#include "MainWindow.hpp"

// QWidget-based tests need a full QApplication (not QCoreApplication).
// Use offscreen platform so tests run headless in containers.
static int argc_ = 0;
static char* argv_[] = {nullptr};
static struct SetupOffscreen
{
  SetupOffscreen() { qputenv("QT_QPA_PLATFORM", "offscreen"); }
} setup_offscreen_;
static QApplication app_(argc_, argv_);

TEST(MainWindowTest, LabelUpdatesOnValueReceived)
{
  MainWindow window;
  // Simulate receiving a value from ConsumerThread
  window.onValueReceived(42);

  // The label should display the received value
  EXPECT_NE(window.lastDisplayedText().toStdString().find("42"),
            std::string::npos);
}

TEST(MainWindowTest, LabelUpdatesMultipleTimes)
{
  MainWindow window;
  window.onValueReceived(10);
  window.onValueReceived(20);
  window.onValueReceived(30);

  // Label should show the most recent value
  EXPECT_NE(window.lastDisplayedText().toStdString().find("30"),
            std::string::npos);
}

TEST(MainWindowTest, WindowTitleIsSet)
{
  MainWindow window;
  EXPECT_FALSE(window.windowTitle().isEmpty());
}