function closeApp()

in src/gemini_95/index.ts [221:283]
51 lines of code
15 McCabe index (conditional complexity)

function closeApp(appName: string): void {
    const appData = openApps.get(appName);
    if (!appData) return;

    const { windowEl, taskbarButton } = appData;

    windowEl.style.display = 'none'; // Hide the window
    windowEl.classList.remove('active');
    taskbarButton.remove(); // Remove taskbar button
    openApps.delete(appName); // Remove from open apps map

    // Clean up DOS instance if applicable
    if (dosInstances[appName]) {
        console.log(`Cleaning up ${appName} instance (iframe approach)`);
        const container = document.getElementById(`${appName}-content`);
        if (container) container.innerHTML = ''; // Clear iframe
        delete dosInstances[appName];
    }

    // Stop Paint Critique if Paint is closed
    if (appName === 'paint') {
        if (paintCritiqueIntervalId) {
            clearInterval(paintCritiqueIntervalId);
            paintCritiqueIntervalId = null;
            if (paintAssistant) paintAssistant.classList.remove('visible');
            console.log("Stopped paint critique interval.");
        }
         // Disconnect ResizeObserver for Paint
         const paintContent = appData.windowEl.querySelector('.window-content') as HTMLDivElement | null;
         if (paintContent && paintResizeObserverMap.has(paintContent)) {
             paintResizeObserverMap.get(paintContent)?.disconnect();
             paintResizeObserverMap.delete(paintContent);
             console.log("Disconnected paint ResizeObserver.");
         }
    }

    // Stop Minesweeper Timer if Minesweeper is closed
    if (appName === 'minesweeper') {
        if (minesweeperTimerInterval) {
            clearInterval(minesweeperTimerInterval);
            minesweeperTimerInterval = null;
            console.log("Stopped Minesweeper timer.");
        }
    }

    // Activate the next highest window if the closed one was active
    if (activeWindow === windowEl) {
        activeWindow = null; // Clear current active window
        let nextAppToActivate: HTMLDivElement | null = null;
        let maxZ = -1; // Use -1 to ensure any window is higher
        openApps.forEach((data) => {
             // No need to check display style, bringToFront will handle visibility
             const z = parseInt(data.windowEl.style.zIndex || '0', 10);
             if (z > maxZ) {
                 maxZ = z;
                 nextAppToActivate = data.windowEl;
             }
        });
        if (nextAppToActivate) {
            bringToFront(nextAppToActivate);
        }
    }
}