using UnityEngine;
using UnityEngine.InputSystem;

public class GlobalFullscreenHotkey : MonoBehaviour
{
    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
    static void Bootstrap()
    {
        var go = new GameObject("GlobalFullscreenHotkey");
        go.AddComponent<GlobalFullscreenHotkey>();
        Object.DontDestroyOnLoad(go);
    }

    void Update()
    {
        var kb = Keyboard.current;
        if (kb == null) return;

        bool f11 = kb.f11Key.wasPressedThisFrame;
        bool altEnter = kb.enterKey.wasPressedThisFrame && (kb.leftAltKey.isPressed || kb.rightAltKey.isPressed);

        if (f11 || altEnter) Toggle();
    }

    static void Toggle()
    {
        bool fs = !Screen.fullScreen;
        Screen.fullScreenMode = fs ? FullScreenMode.FullScreenWindow : FullScreenMode.Windowed;

        if (fs)
        {
            Screen.SetResolution(Display.main.systemWidth, Display.main.systemHeight, true);
            Screen.fullScreen = true;
        }
        else
        {
            int w = Mathf.RoundToInt(Display.main.systemWidth * 0.5f);
            int h = Mathf.RoundToInt(Display.main.systemHeight * 0.5f);
            Screen.fullScreen = false;
            Screen.SetResolution(w, h, false);
        }
    }
}