using UnityEngine;  
  using UnityEngine.InputSystem;  
  
  public class TouchInputHandler : MonoBehaviour  
  {  
    void Update() {  
        // New Input System — recommended  
        if (Touchscreen.current == null) return;  
  
        var touches = Touchscreen.current.touches;  
        foreach (var touch in touches) {  
            if (touch.phase.ReadValue() == UnityEngine.InputSystem.TouchPhase.Began) {  
                Vector2 pos = touch.position.ReadValue();  
                HandleTap(pos);  
            }  
        }  
    }  
  
    // Legacy Input — still widely used  
    void UpdateLegacy() {  
        for (int i = 0; i < Input.touchCount; i++) {  
            Touch touch = Input.GetTouch(i);  
  
            switch (touch.phase) {  
                case TouchPhase.Began:  
                    HandleTouchStart(touch.position, touch.fingerId);  
                    break;  
                case TouchPhase.Moved:  
                    HandleTouchMove(touch.position, touch.deltaPosition, touch.fingerId);  
                    break;  
                case TouchPhase.Ended:  
                case TouchPhase.Canceled:  
                    HandleTouchEnd(touch.fingerId);  
                    break;  
            }  
        }  
    }  
  
    void HandleTap(Vector2 screenPos) {  
        // Convert screen position to world position  
        Ray ray = Camera.main.ScreenPointToRay(screenPos);  
        if (Physics.Raycast(ray, out RaycastHit hit)) {  
            Debug.Log("Tapped: " + hit.collider.name);  
        }  
    }  
  
    void HandleTouchStart(Vector2 pos, int id) { }  
    void HandleTouchMove(Vector2 pos, Vector2 delta, int id) { }  
    void HandleTouchEnd(int id) { }  
  }

extends Node2D
 
var touch_positions: Dictionary = {}  # finger_id → position
 
func _input(event: InputEvent) -> void:
    if event is InputEventScreenTouch:
        if event.pressed:
            touch_positions[event.index] = event.position
            _on_touch_start(event.index, event.position)
        else:
            touch_positions.erase(event.index)
            _on_touch_end(event.index, event.position)
 
    elif event is InputEventScreenDrag:
        touch_positions[event.index] = event.position
        _on_touch_drag(event.index, event.position, event.relative)
 
func _on_touch_start(finger_id: int, pos: Vector2) -> void:
    print("Touch started: finger %d at %s" % [finger_id, pos])
 
func _on_touch_drag(finger_id: int, pos: Vector2, delta: Vector2) -> void:
    # Virtual joystick logic
    if finger_id == 0:  # left thumb
        var joystick_input = (pos - joystick_origin).normalized()
        player.velocity = joystick_input * player_speed
 
func _on_touch_end(finger_id: int, pos: Vector2) -> void:
    if finger_id == 0:
        player.velocity = Vector2.ZERO

# Simple swipe detection in Godot
extends Node
 
var touch_start: Vector2
var touch_start_time: float
const SWIPE_MIN_DISTANCE: float = 50.0
const SWIPE_MAX_TIME: float = 0.3
 
func _input(event: InputEvent) -> void:
    if event is InputEventScreenTouch:
        if event.pressed:
            touch_start = event.position
            touch_start_time = Time.get_ticks_msec() / 1000.0
        else:
            var elapsed = Time.get_ticks_msec() / 1000.0 - touch_start_time
            var delta = event.position - touch_start
            if delta.length() > SWIPE_MIN_DISTANCE and elapsed < SWIPE_MAX_TIME:
                _on_swipe(delta.normalized())
 
func _on_swipe(direction: Vector2) -> void:
    if abs(direction.x) > abs(direction.y):
        if direction.x > 0: print("Swipe RIGHT")
        else: print("Swipe LEFT")
    else:
        if direction.y > 0: print("Swipe DOWN")
        else: print("Swipe UP")

// Unity — gyroscope and accelerometer
void Start() {
    // Enable gyroscope
    Input.gyro.enabled = true;
}
 
void Update() {
    // Accelerometer — tilt controls
    Vector3 tilt = Input.acceleration;
    // tilt.x = left/right tilt (-1 to 1)
    // tilt.y = forward/back tilt
    // tilt.z = face up/down
 
    float steerInput = Mathf.Clamp(tilt.x * 2f, -1f, 1f);
    car.Steer(steerInput);
 
    // Gyroscope — rotation rate
    Vector3 rotationRate = Input.gyro.rotationRate;
    // Use for aiming, camera control in FPS
}

// iOS Haptic Feedback — Unity
#if UNITY_IOS
using UnityEngine.iOS;
 
public class HapticManager : MonoBehaviour
{
    // Light tap — UI interactions
    public void LightImpact() {
        Handheld.Vibrate(); // basic
        // For precise haptics use iOS native plugin
  }
 
    // Trigger haptic via native iOS API
    [System.Runtime.InteropServices.DllImport("__Internal")]
    private static extern void _TriggerHapticFeedback(int style);
    // style: 0=light, 1=medium, 2=heavy, 3=soft, 4=rigid
 
    public void MediumImpact() => _TriggerHapticFeedback(1);
    public void HeavyImpact()  => _TriggerHapticFeedback(2);
}
#endif

using UnityEngine.SocialPlatforms;
using UnityEngine.SocialPlatforms.GameCenter;
 
public class GameCenterManager : MonoBehaviour
{
    void Start() {
        // Authenticate with Game Center
        Social.localUser.Authenticate(success => {
            if (success) Debug.Log("Game Center: Authenticated");
            else Debug.Log("Game Center: Failed");
        });
    }
 
    // Report score to leaderboard
    public void ReportScore(long score, string leaderboardID) {
        Social.ReportScore(score, leaderboardID, success => {
            Debug.Log("Score reported: " + success);
        });
    }
 
    // Unlock achievement
    public void UnlockAchievement(string achievementID) {
        Social.ReportProgress(achievementID, 100.0, success => {
            Debug.Log("Achievement unlocked: " + success);
        });
    }
 
    // Show leaderboard UI
    public void ShowLeaderboard() {
        Social.ShowLeaderboardUI();
    }
}

// Android Game Development Kit — Frame Pacing
// Eliminates jank caused by irregular frame delivery
#include "swappy/swappyGL.h"
 
// Initialize Swappy
SwappyGL_init(env, activity);
SwappyGL_setSwapIntervalNS(1000000000L / 60); // 60 FPS
 
// In render loop — replace eglSwapBuffers with:
SwappyGL_swap(display, surface); // handles frame pacing automatically

using UnityEngine.Android;
 
public class AdaptivePerformanceManager : MonoBehaviour
{
    IAdaptivePerformance ap;
 
    void Start() {
        ap = Holder.Instance;
        if (ap == null || !ap.Active) return;
 
        // Subscribe to thermal warnings
        ap.ThermalStatus.ThermalEvent += OnThermalEvent;
    }
 
    void OnThermalEvent(ThermalMetrics metrics) {
        switch (metrics.WarningLevel) {
            case WarningLevel.NoWarning:
                SetQuality(QualityLevel.High);
                break;
            case WarningLevel.ThrottlingImminent:
                SetQuality(QualityLevel.Medium);
                break;
            case WarningLevel.Throttling:
                SetQuality(QualityLevel.Low);
                break;
        }
    }
 
    void SetQuality(QualityLevel level) {
        switch (level) {
            case QualityLevel.High:
                QualitySettings.SetQualityLevel(2);
                Application.targetFrameRate = 60;
                break;
            case QualityLevel.Medium:
                QualitySettings.SetQualityLevel(1);
                Application.targetFrameRate = 30;
                break;
            case QualityLevel.Low:
                QualitySettings.SetQualityLevel(0);
                Application.targetFrameRate = 30;
                break;
        }
    }
}

using UnityEngine;
using UnityEngine.Purchasing;
using UnityEngine.Purchasing.Extension;
 
public class IAPManager : MonoBehaviour, IDetailedStoreListener
{
    IStoreController storeController;
 
    // Product IDs — must match App Store / Play Store
    const string PRODUCT_GEMS_100    = "com.mygame.gems100";
    const string PRODUCT_NO_ADS      = "com.mygame.noads";
    const string PRODUCT_MONTHLY_SUB = "com.mygame.monthly";
 
    void Start() {
        var builder = ConfigurationBuilder.Instance(
            StandardPurchasingModule.Instance());
 
        // Add products
        builder.AddProduct(PRODUCT_GEMS_100,    ProductType.Consumable);
        builder.AddProduct(PRODUCT_NO_ADS,      ProductType.NonConsumable);
        builder.AddProduct(PRODUCT_MONTHLY_SUB, ProductType.Subscription);
 
        UnityPurchasing.Initialize(this, builder);
    }
 
    // Buy a product
    public void BuyGems() {
        storeController.InitiatePurchase(PRODUCT_GEMS_100);
    }
 
    // Called on successful purchase
    public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs args) {
        if (args.purchasedProduct.definition.id == PRODUCT_GEMS_100) {
            GivePlayerGems(100);
        }
        else if (args.purchasedProduct.definition.id == PRODUCT_NO_ADS) {
            DisableAds();
        }
        return PurchaseProcessingResult.Complete;
    }
 
    public void OnInitialized(IStoreController controller,
                               IExtensionProvider extensions) {
        storeController = controller;
    }
 
    public void OnInitializeFailed(InitializationFailureReason error,
                                    string message) {
        Debug.LogError("IAP Init failed: " + error);
    }
 
    public void OnPurchaseFailed(Product product,
                                  PurchaseFailureDescription failure) {
        Debug.LogError("Purchase failed: " + failure.reason);
    }
 
    void GivePlayerGems(int amount) { /* add gems to player */ }
    void DisableAds() { /* set no-ads flag */ }
}

using UnityEngine;
using UnityEngine.Advertisements;
 
public class AdsManager : MonoBehaviour, IUnityAdsLoadListener,
                                          IUnityAdsShowListener
{
    [SerializeField] string androidGameID = "1234567";
    [SerializeField] string iosGameID     = "7654321";
    const string REWARDED_AD_UNIT = "Rewarded_Android"; // or iOS
 
    void Start() {
        string gameID = Application.platform == RuntimePlatform.IPhonePlayer
            ? iosGameID : androidGameID;
        Advertisement.Initialize(gameID, testMode: false);
        LoadRewardedAd();
    }
 
    void LoadRewardedAd() {
        Advertisement.Load(REWARDED_AD_UNIT, this);
    }
 
    public void ShowRewardedAd(System.Action onRewardGranted) {
        this.onRewardGranted = onRewardGranted;
        Advertisement.Show(REWARDED_AD_UNIT, this);
    }
 
    System.Action onRewardGranted;
 
    // IUnityAdsShowListener
    public void OnUnityAdsShowComplete(string adUnitId,
        UnityAdsShowCompletionState completionState) {
        if (completionState == UnityAdsShowCompletionState.COMPLETED) {
            onRewardGranted?.Invoke(); // grant reward
        }
        LoadRewardedAd(); // preload next ad
    }
 
    public void OnUnityAdsAdLoaded(string adUnitId) { }
    public void OnUnityAdsFailedToLoad(string id, UnityAdsLoadError e, string msg) { }
    public void OnUnityAdsShowFailure(string id, UnityAdsShowError e, string msg) { }
    public void OnUnityAdsShowStart(string adUnitId) { }
    public void OnUnityAdsShowClick(string adUnitId) { }
}

// Detect platform and adjust behavior
void Start() {
    #if UNITY_IOS
        InitGameCenter();
        SetIOSQuality();
    #elif UNITY_ANDROID
        InitGooglePlayGames();
        SetAndroidQuality();
    #endif
 
    // Runtime detection
    if (Application.isMobilePlatform) {
        EnableTouchControls();
        DisableMouseControls();
        Application.targetFrameRate = 60;
    }
 
    // Screen orientation
    Screen.orientation = ScreenOrientation.LandscapeLeft;
    Screen.sleepTimeout = SleepTimeout.NeverSleep; // prevent screen sleep
}
 
void SetIOSQuality() {
    // iPhone 15 Pro — high quality
    if (SystemInfo.graphicsMemorySize >= 4096) {
        QualitySettings.SetQualityLevel(3);
        Application.targetFrameRate = 60;
    }
    // iPhone SE — low quality
    else {
        QualitySettings.SetQualityLevel(1);
        Application.targetFrameRate = 30;
    }
}

// Handle iPhone notch, Dynamic Island, Android punch-hole cameras
using UnityEngine;
 
public class SafeAreaHandler : MonoBehaviour
{
    RectTransform rectTransform;
    Rect lastSafeArea;
 
    void Awake() {
        rectTransform = GetComponent<RectTransform>();
        ApplySafeArea();
    }
 
    void ApplySafeArea() {
        Rect safeArea = Screen.safeArea;
        if (safeArea == lastSafeArea) return;
        lastSafeArea = safeArea;
 
        // Convert safe area to anchor min/max
        Vector2 anchorMin = safeArea.position;
        Vector2 anchorMax = safeArea.position + safeArea.size;
        anchorMin.x /= Screen.width;
        anchorMin.y /= Screen.height;
        anchorMax.x /= Screen.width;
        anchorMax.y /= Screen.height;
 
        rectTransform.anchorMin = anchorMin;
        rectTransform.anchorMax = anchorMax;
    }
}