/**************************************************************************/
/*  Godot.kt                                                              */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* Permission is hereby granted, free of charge, to any person obtaining  */
/* a copy of this software and associated documentation files (the        */
/* "Software"), to deal in the Software without restriction, including    */
/* without limitation the rights to use, copy, modify, merge, publish,    */
/* distribute, sublicense, and/or sell copies of the Software, and to     */
/* permit persons to whom the Software is furnished to do so, subject to  */
/* the following conditions:                                              */
/*                                                                        */
/* The above copyright notice and this permission notice shall be         */
/* included in all copies or substantial portions of the Software.        */
/*                                                                        */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
/**************************************************************************/

package org.godotengine.godot

import android.annotation.SuppressLint
import android.app.Activity
import android.app.AlertDialog
import android.content.*
import android.content.pm.PackageManager
import android.content.res.Configuration
import android.content.res.Resources
import android.graphics.Color
import android.graphics.drawable.ColorDrawable
import android.hardware.Sensor
import android.hardware.SensorManager
import android.os.*
import android.util.Log
import android.util.TypedValue
import android.view.*
import android.widget.FrameLayout
import androidx.annotation.Keep
import androidx.annotation.StringRes
import androidx.core.graphics.ColorUtils
import androidx.core.graphics.toColorInt
import androidx.core.view.ViewCompat
import androidx.core.view.WindowCompat
import androidx.core.view.WindowInsetsAnimationCompat
import androidx.core.view.WindowInsetsCompat
import androidx.core.view.WindowInsetsControllerCompat
import com.google.android.vending.expansion.downloader.*
import org.godotengine.godot.error.Error
import org.godotengine.godot.input.GodotEditText
import org.godotengine.godot.input.GodotInputHandler
import org.godotengine.godot.io.FilePicker
import org.godotengine.godot.io.directory.DirectoryAccessHandler
import org.godotengine.godot.io.file.FileAccessHandler
import org.godotengine.godot.plugin.AndroidRuntimePlugin
import org.godotengine.godot.plugin.GodotPlugin
import org.godotengine.godot.plugin.GodotPluginRegistry
import org.godotengine.godot.tts.GodotTTS
import org.godotengine.godot.utils.DialogUtils
import org.godotengine.godot.utils.GodotNetUtils
import org.godotengine.godot.utils.PermissionsUtil
import org.godotengine.godot.utils.PermissionsUtil.requestPermission
import org.godotengine.godot.utils.beginBenchmarkMeasure
import org.godotengine.godot.utils.benchmarkFile
import org.godotengine.godot.utils.dumpBenchmark
import org.godotengine.godot.utils.endBenchmarkMeasure
import org.godotengine.godot.utils.useBenchmark
import org.godotengine.godot.variant.Callable as GodotCallable
import org.godotengine.godot.xr.XRMode
import java.io.File
import java.io.FileInputStream
import java.io.InputStream
import java.security.MessageDigest
import java.util.*
import java.util.concurrent.Callable
import java.util.concurrent.FutureTask
import java.util.concurrent.atomic.AtomicBoolean
import java.util.concurrent.atomic.AtomicReference


/**
 * Core component used to interface with the native layer of the engine.
 *
 * Can be hosted by [Activity], [Fragment] or [Service] android components, so long as its
 * lifecycle methods are properly invoked.
 */
class Godot private constructor(val context: Context) {

	companion object {
		private val TAG = Godot::class.java.simpleName

		@Volatile private var INSTANCE: Godot? = null

		@JvmStatic
		fun getInstance(context: Context): Godot {
			return INSTANCE ?: synchronized(this) {
				INSTANCE ?: Godot(context.applicationContext).also { INSTANCE = it }
			}
		}

		private const val EXIT_RENDERER_TIMEOUT_IN_MS = 1500L

		// Supported build flavors
		private const val EDITOR_FLAVOR = "editor"
		private const val TEMPLATE_FLAVOR = "template"

		/**
		 * @return true if this is an editor build, false if this is a template build
		 */
		internal fun isEditorBuild() = BuildConfig.FLAVOR == EDITOR_FLAVOR
	}

	/**
	 * Describes the engine current run status.
	 */
	enum class RunStatus {
		INITIALIZING,
		STARTED,
		TERMINATING
	}

	private val mSensorManager: SensorManager? by lazy { context.getSystemService(Context.SENSOR_SERVICE) as? SensorManager }
	private val mClipboard: ClipboardManager? by lazy { context.getSystemService(Context.CLIPBOARD_SERVICE) as? ClipboardManager }
	private val vibratorService: Vibrator? by lazy { context.getSystemService(Context.VIBRATOR_SERVICE) as? Vibrator }
	private val pluginRegistry: GodotPluginRegistry by lazy { GodotPluginRegistry.getPluginRegistry() }

	private val accelerometerEnabled = AtomicBoolean(false)
	private val mAccelerometer: Sensor? by lazy { mSensorManager?.getDefaultSensor(Sensor.TYPE_ACCELEROMETER) }

	private val gravityEnabled = AtomicBoolean(false)
	private val mGravity: Sensor? by lazy { mSensorManager?.getDefaultSensor(Sensor.TYPE_GRAVITY) }

	private val magnetometerEnabled = AtomicBoolean(false)
	private val mMagnetometer: Sensor? by lazy { mSensorManager?.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD) }

	private val gyroscopeEnabled = AtomicBoolean(false)
	private val mGyroscope: Sensor? by lazy { mSensorManager?.getDefaultSensor(Sensor.TYPE_GYROSCOPE) }

	val isXrRuntime: Boolean by lazy { hasFeature("xr_runtime") }

	val tts = GodotTTS(context)
	val directoryAccessHandler = DirectoryAccessHandler(context)
	val fileAccessHandler = FileAccessHandler(context)
	val netUtils = GodotNetUtils(context)
	private val godotInputHandler = GodotInputHandler(context, this)

	private val hasClipboardCallable = Callable {
		mClipboard?.hasPrimaryClip() == true
	}

	private val getClipboardCallable = Callable {
		val clipData = mClipboard?.primaryClip
		val text = clipData?.getItemAt(0)?.text
		text?.toString() ?: ""
	}

	/**
	 * Task to run when the engine terminates.
	 */
	private val runOnTerminate = AtomicReference<Runnable>()

	/**
	 * Tracks whether [GodotLib.initialize] was completed successfully.
	 */
	private var nativeLayerInitializeCompleted = false

	/**
	 * Tracks whether [GodotLib.setup] was completed successfully.
	 */
	private var nativeLayerSetupCompleted = false

	/**
	 * Tracks whether [onInitRenderView] was completed successfully.
	 */
	private var renderViewInitialized = false
	private var primaryHost: GodotHost? = null
	private var currentConfig = context.resources.configuration

	/**
	 * Tracks whether we're in the RESUMED lifecycle state.
	 * See [onResume] and [onPause]
	 */
	private var resumed = false

	/**
	 * Tracks the engine's run status.
	 */
	private val _runStatus = AtomicReference<RunStatus>(RunStatus.INITIALIZING)
	val runStatus: RunStatus
		get() = _runStatus.get()

	val io = GodotIO(this)

	private var commandLine : MutableList<String> = ArrayList<String>()
	private var xrMode = XRMode.REGULAR
	private val useImmersive = AtomicBoolean(false)
	private val isEdgeToEdge = AtomicBoolean(false)
	private var useDebugOpengl = false
	private var darkMode = false
	private var backgroundColor: Int = Color.BLACK

	internal var containerLayout: FrameLayout? = null
	var renderView: GodotRenderView? = null

	/**
	 * Returns true if the native engine has been initialized through [onInitNativeLayer], false otherwise.
	 */
	private fun isNativeInitialized() = nativeLayerInitializeCompleted && nativeLayerSetupCompleted

	/**
	 * Returns true if the engine has been initialized, false otherwise.
	 */
	fun isInitialized() = primaryHost != null && isNativeInitialized() && renderViewInitialized

	/**
	 * Provides access to the primary host [Activity]
	 */
	fun getActivity() = primaryHost?.activity

	/**
	 * Start initialization of the Godot engine.
	 *
	 * This must be followed by [onInitRenderView] to complete initialization of the engine.
	 *
	 * @return false if initialization of the native layer fails, true otherwise.
	 *
	 * @throws IllegalArgumentException exception if the specified expansion pack (if any)
	 * is invalid.
	 */
	fun initEngine(host: GodotHost?, commandLineParams: List<String>, hostPlugins: Set<GodotPlugin> = Collections.emptySet()): Boolean {
		if (isNativeInitialized()) {
			Log.d(TAG, "Engine already initialized")
			return true
		}

		Log.v(TAG, "InitEngine with params: $commandLineParams")

		darkMode = context.resources?.configuration?.uiMode?.and(Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES

		beginBenchmarkMeasure("Startup", "Godot::initEngine")
		try {
			this.primaryHost = host

			Log.v(TAG, "Initializing Godot plugin registry")
			val runtimePlugins = mutableSetOf<GodotPlugin>(AndroidRuntimePlugin(this))
			runtimePlugins.addAll(hostPlugins)
			GodotPluginRegistry.initializePluginRegistry(this, runtimePlugins)

			// check for apk expansion API
			commandLine.addAll(commandLineParams)
			var mainPackMd5: String? = null
			var mainPackKey: String? = null
			var useApkExpansion = false
			val newArgs: MutableList<String> = ArrayList()
			var i = 0
			while (i < commandLine.size) {
				val hasExtra: Boolean = i < commandLine.size - 1
				if (commandLine[i] == XRMode.REGULAR.cmdLineArg) {
					xrMode = XRMode.REGULAR
				} else if (commandLine[i] == XRMode.OPENXR.cmdLineArg) {
					xrMode = XRMode.OPENXR
				} else if (commandLine[i] == "--debug_opengl") {
					useDebugOpengl = true
				} else if (commandLine[i] == "--edge_to_edge") {
					isEdgeToEdge.set(true)
				} else if (commandLine[i] == "--fullscreen") {
					useImmersive.set(true)
					newArgs.add(commandLine[i])
				} else if (commandLine[i] == "--background_color") {
					setWindowColor(commandLine[i + 1])
				} else if (commandLine[i] == "--use_apk_expansion") {
					useApkExpansion = true
				} else if (hasExtra && commandLine[i] == "--apk_expansion_md5") {
					mainPackMd5 = commandLine[i + 1]
					i++
				} else if (hasExtra && commandLine[i] == "--apk_expansion_key") {
					mainPackKey = commandLine[i + 1]
					val prefs = context.getSharedPreferences(
							"app_data_keys",
							Context.MODE_PRIVATE
					)
					val editor = prefs.edit()
					editor.putString("store_public_key", mainPackKey)
					editor.apply()
					i++
				} else if (commandLine[i] == "--benchmark") {
					useBenchmark = true
					newArgs.add(commandLine[i])
				} else if (hasExtra && commandLine[i] == "--benchmark-file") {
					useBenchmark = true
					newArgs.add(commandLine[i])

					// Retrieve the filepath
					benchmarkFile = commandLine[i + 1]
					newArgs.add(commandLine[i + 1])

					i++
				} else if (commandLine[i].trim().isNotEmpty()) {
					newArgs.add(commandLine[i])
				}
				i++
			}

			var expansionPackPath = ""
			commandLine = if (newArgs.isEmpty()) { mutableListOf() } else { newArgs }
			if (useApkExpansion && mainPackMd5 != null && mainPackKey != null) {
				// Build the full path to the app's expansion files
				try {
					expansionPackPath = Helpers.getSaveFilePath(context)
					expansionPackPath += "/main." + context.packageManager.getPackageInfo(
							context.packageName,
							0
					).versionCode + "." + context.packageName + ".obb"
				} catch (e: java.lang.Exception) {
					Log.e(TAG, "Unable to build full path to the app's expansion files", e)
				}
				val f = File(expansionPackPath)
				var packValid = true
				if (!f.exists()) {
					packValid = false
				} else if (obbIsCorrupted(expansionPackPath, mainPackMd5)) {
					packValid = false
					try {
						f.delete()
					} catch (_: java.lang.Exception) {
					}
				}
				if (!packValid) {
					// Aborting engine initialization
					throw IllegalArgumentException("Invalid expansion pack")
				}
			}

			if (expansionPackPath.isNotEmpty()) {
				commandLine.add("--main-pack")
				commandLine.add(expansionPackPath)
			}
			if (!nativeLayerInitializeCompleted) {
				nativeLayerInitializeCompleted = GodotLib.initialize(
					this,
					context.assets,
					io,
					netUtils,
					directoryAccessHandler,
					fileAccessHandler,
					useApkExpansion,
				)
				Log.v(TAG, "Godot native layer initialization completed: $nativeLayerInitializeCompleted")
			}

			if (nativeLayerInitializeCompleted && !nativeLayerSetupCompleted) {
				nativeLayerSetupCompleted = GodotLib.setup(commandLine.toTypedArray(), tts)
				if (!nativeLayerSetupCompleted) {
					throw IllegalStateException("Unable to setup the Godot engine! Aborting...")
				} else {
					Log.v(TAG, "Godot native layer setup completed")
				}
			}
		} finally {
			endBenchmarkMeasure("Startup", "Godot::initEngine")
		}
		return isNativeInitialized()
	}

	/**
	 * Enable edge-to-edge.
	 *
	 * Must be called from the UI thread.
	 */
	@JvmOverloads
	fun enableEdgeToEdge(enabled: Boolean, override: Boolean = false) {
		// Note: If modifying edge-to-edge or immersive mode logic, ensure to test with GodotIO.getDisplaySafeArea()
		// to confirm there are no regressions in safe area calculation.
		val window = getActivity()?.window ?: return

		if (!isEdgeToEdge.compareAndSet(!enabled, enabled) && !override) {
			return
		}

		val rootView = window.decorView
		WindowCompat.setDecorFitsSystemWindows(window, !(isEdgeToEdge.get() || useImmersive.get()))
		if (enabled) {
			ViewCompat.setOnApplyWindowInsetsListener(rootView, null)
			rootView.setPadding(0, 0, 0, 0)
			if (Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
				window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS)
				window.addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION)
			}
		} else {
			if (rootView.rootWindowInsets != null) {
				if (!useImmersive.get()) {
					val windowInsets = WindowInsetsCompat.toWindowInsetsCompat(rootView.rootWindowInsets)
					val insets = windowInsets.getInsets(getInsetType())
					rootView.setPadding(insets.left, insets.top, insets.right, insets.bottom)
				}
			}

			ViewCompat.setOnApplyWindowInsetsListener(rootView) { v: View, insets: WindowInsetsCompat ->
				v.post {
					if (useImmersive.get()) {
						if (isEditorBuild()) {
							val windowInsets = insets.getInsets(WindowInsetsCompat.Type.displayCutout())
							v.setPadding(windowInsets.left, windowInsets.top, windowInsets.right, windowInsets.bottom)
						} else {
							v.setPadding(0, 0, 0, 0)
						}
					} else {
						val windowInsets = insets.getInsets(getInsetType())
						v.setPadding(windowInsets.left, windowInsets.top, windowInsets.right, windowInsets.bottom)
					}
				}
				WindowInsetsCompat.CONSUMED
			}
		}
	}

	private fun getInsetType(): Int {
		return if (!useImmersive.get() || isEditorBuild()) {
			WindowInsetsCompat.Type.systemBars() or WindowInsetsCompat.Type.displayCutout()
		} else {
			WindowInsetsCompat.Type.systemBars()
		}
	}

	/**
	 * Toggle immersive mode.
	 * Must be called from the UI thread.
	 */
	@JvmOverloads
	fun enableImmersiveMode(enabled: Boolean, override: Boolean = false) {
		// Note: If modifying edge-to-edge or immersive mode logic, ensure to test with GodotIO.getDisplaySafeArea()
		// to confirm there are no regressions in safe area calculation.
		val activity = getActivity() ?: return
		val window = activity.window ?: return

		if (!useImmersive.compareAndSet(!enabled, enabled) && !override) {
			return
		}

		WindowCompat.setDecorFitsSystemWindows(window, !(isEdgeToEdge.get() || useImmersive.get()))
		val controller = WindowInsetsControllerCompat(window, window.decorView)
		if (enabled) {
			controller.hide(WindowInsetsCompat.Type.systemBars())
			controller.systemBarsBehavior = WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
		} else {
			val fullScreenThemeValue = TypedValue()
			val hasStatusBar = if (activity.theme.resolveAttribute(android.R.attr.windowFullscreen, fullScreenThemeValue, true) && fullScreenThemeValue.type == TypedValue.TYPE_INT_BOOLEAN) {
				fullScreenThemeValue.data == 0
			} else {
				// Fallback to checking the editor build
				!isEditorBuild()
			}

			val types = if (hasStatusBar) {
				WindowInsetsCompat.Type.navigationBars() or WindowInsetsCompat.Type.statusBars()
			} else {
				WindowInsetsCompat.Type.navigationBars()
			}
			controller.show(types)
		}
	}

	/**
	 * Invoked from the render thread to toggle the immersive mode.
	 */
	@Keep
	private fun nativeEnableImmersiveMode(enabled: Boolean) {
		runOnHostThread {
			enableImmersiveMode(enabled)
		}
	}

	@Keep
	fun isInImmersiveMode() = useImmersive.get()

	@Keep
	fun isInEdgeToEdgeMode() = isEdgeToEdge.get()

	fun setSystemBarsAppearance() {
		val window = getActivity()?.window ?: return
		val isLight = ColorUtils.calculateLuminance(getWindowBackgroundColor(window)) > 0.5

		val controller = WindowInsetsControllerCompat(window, window.decorView)
		controller.isAppearanceLightNavigationBars = isLight
		controller.isAppearanceLightStatusBars = isLight
	}

	private fun getWindowBackgroundColor(window: Window): Int {
		val background = window.decorView.background
		return if (background is ColorDrawable) {
			background.color
		} else {
			backgroundColor
		}
	}

	fun setWindowColor(colorStr: String) {
		val color = try {
			colorStr.toColorInt()
		} catch (e: java.lang.IllegalArgumentException) {
			Log.w(TAG, "Failed to parse background color: $colorStr", e)
			return
		}
		val decorView = getActivity()?.window?.decorView ?: return
		runOnHostThread {
			decorView.setBackgroundColor(color)
			backgroundColor = color
			setSystemBarsAppearance()
		}
	}

	/**
	 * Used to complete initialization of the view used by the engine for rendering.
	 *
	 * This must be preceded by [initEngine] to properly initialize the engine.
	 *
	 * @param host The [GodotHost] that's initializing the render views
	 * @param providedContainerLayout Optional argument; if provided, this is reused to host the Godot's render views
	 *
	 * @return A [FrameLayout] instance containing Godot's render views if initialization is successful, null otherwise.
	 *
	 * @throws IllegalStateException if [initEngine] has not been called
	 */
	@JvmOverloads
	fun onInitRenderView(host: GodotHost, providedContainerLayout: FrameLayout = FrameLayout(context)): FrameLayout? {
		if (!isNativeInitialized()) {
			throw IllegalStateException("initEngine(...) must be invoked successfully prior to initializing the render view")
		}

		beginBenchmarkMeasure("Startup", "Godot::onInitRenderView")
		Log.v(TAG, "OnInitRenderView: $host")
		try {
			this.primaryHost = host
			getActivity()?.window?.addFlags(WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON)

			if (containerLayout != null) {
				assert(renderViewInitialized)
				return containerLayout
			}

			containerLayout = providedContainerLayout
			containerLayout?.removeAllViews()
			val layoutParams = containerLayout?.layoutParams ?: ViewGroup.LayoutParams(
					ViewGroup.LayoutParams.MATCH_PARENT,
					ViewGroup.LayoutParams.MATCH_PARENT
			)
			layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT
			layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
			containerLayout?.layoutParams = layoutParams

			// GodotEditText layout
			val editText = GodotEditText(context)
			editText.layoutParams =
					ViewGroup.LayoutParams(
							ViewGroup.LayoutParams.MATCH_PARENT,
							context.resources.getDimension(R.dimen.text_edit_height).toInt()
					)
			// Prevent GodotEditText from showing on splash screen on devices with Android 14 or newer.
			editText.setBackgroundColor(Color.TRANSPARENT)
			// ...add to FrameLayout
			containerLayout?.addView(editText)

			// Check whether the render view should be made transparent
			val shouldBeTransparent =
				!isProjectManagerHint() &&
					!isEditorHint() &&
					java.lang.Boolean.parseBoolean(GodotLib.getGlobal("display/window/per_pixel_transparency/allowed"))
			Log.d(TAG, "Render view should be transparent: $shouldBeTransparent")
			renderView = if (usesVulkan()) {
				if (meetsVulkanRequirements(context.packageManager)) {
					GodotVulkanRenderView(this, godotInputHandler, shouldBeTransparent)
				} else if (canFallbackToOpenGL()) {
					// Fallback to OpenGl.
					GodotGLRenderView(this, godotInputHandler, xrMode, useDebugOpengl, shouldBeTransparent)
				} else {
					throw IllegalStateException(context.getString(R.string.error_missing_vulkan_requirements_message))
				}

			} else {
				// Fallback to OpenGl.
				GodotGLRenderView(this, godotInputHandler, xrMode, useDebugOpengl, shouldBeTransparent)
			}

			renderView?.let {
				it.startRenderer()
				containerLayout?.addView(
					it.view,
					ViewGroup.LayoutParams(
							ViewGroup.LayoutParams.MATCH_PARENT,
							ViewGroup.LayoutParams.MATCH_PARENT
					)
				)
			}

			editText.setView(renderView)
			io.setEdit(editText)

			val activity = host.activity
			// Listeners for keyboard height.
			val topView = activity?.window?.decorView ?: providedContainerLayout
			// Report the height of virtual keyboard as it changes during the animation.
			ViewCompat.setWindowInsetsAnimationCallback(topView, object : WindowInsetsAnimationCompat.Callback(DISPATCH_MODE_STOP) {
				var startBottom = 0
				var endBottom = 0
				override fun onPrepare(animation: WindowInsetsAnimationCompat) {
					startBottom = ViewCompat.getRootWindowInsets(topView)?.getInsets(WindowInsetsCompat.Type.ime())?.bottom ?: 0
				}

				override fun onStart(
					animation: WindowInsetsAnimationCompat,
					bounds: WindowInsetsAnimationCompat.BoundsCompat
				): WindowInsetsAnimationCompat.BoundsCompat {
					endBottom = ViewCompat.getRootWindowInsets(topView)?.getInsets(WindowInsetsCompat.Type.ime())?.bottom ?: 0
					return bounds
				}

				override fun onProgress(
					windowInsets: WindowInsetsCompat,
					animationsList: List<WindowInsetsAnimationCompat>
				): WindowInsetsCompat {
					// Find the IME animation.
					var imeAnimation: WindowInsetsAnimationCompat? = null
					for (animation in animationsList) {
						if (animation.typeMask and WindowInsetsCompat.Type.ime() != 0) {
							imeAnimation = animation
							break
						}
					}

					// Update keyboard height based on IME animation.
					if (imeAnimation != null) {
						val interpolatedFraction = imeAnimation.interpolatedFraction
						// Linear interpolation between start and end values.
						val keyboardHeight = startBottom * (1.0f - interpolatedFraction) + endBottom * interpolatedFraction
						val finalHeight = maxOf(keyboardHeight.toInt() - topView.rootView.paddingBottom, 0)
						GodotLib.setVirtualKeyboardHeight(finalHeight)
					}
					return windowInsets
				}

				override fun onEnd(animation: WindowInsetsAnimationCompat) {
					// Fixes an issue on Android 10 and older where immersive mode gets auto disabled after the keyboard is hidden on some devices.
					if (useImmersive.get() && Build.VERSION.SDK_INT < Build.VERSION_CODES.R) {
						runOnHostThread {
							enableImmersiveMode(true, true)
						}
					}
				}
			})

			renderView?.queueOnRenderThread {
				for (plugin in pluginRegistry.allPlugins) {
					plugin.onRegisterPluginWithGodotNative()
				}
				setKeepScreenOn(java.lang.Boolean.parseBoolean(GodotLib.getGlobal("display/window/energy_saving/keep_screen_on")))
			}

			// Include the returned non-null views in the Godot view hierarchy.
			for (plugin in pluginRegistry.allPlugins) {
				val pluginView = plugin.onMainCreate(activity)
				if (pluginView != null) {
					if (plugin.shouldBeOnTop()) {
						containerLayout?.addView(pluginView)
					} else {
						containerLayout?.addView(pluginView, 0)
					}
				}
			}
			renderViewInitialized = true
		} finally {
			if (!renderViewInitialized) {
				containerLayout?.removeAllViews()
				containerLayout = null
			}

			endBenchmarkMeasure("Startup", "Godot::onInitRenderView")
		}
		return containerLayout
	}

	fun onStart(host: GodotHost) {
		Log.v(TAG, "OnStart: $host")
		if (host != primaryHost) {
			return
		}

		renderView?.onActivityStarted()
	}

	fun onResume(host: GodotHost) {
		Log.v(TAG, "OnResume: $host")
		resumed = true
		if (host != primaryHost) {
			return
		}

		renderView?.onActivityResumed()
		registerSensorsIfNeeded()
		for (plugin in pluginRegistry.allPlugins) {
			plugin.onMainResume()
		}
	}

	private fun registerSensorsIfNeeded() {
		if (!resumed || runStatus != RunStatus.STARTED) {
			return
		}

		if (accelerometerEnabled.get() && mAccelerometer != null) {
			mSensorManager?.registerListener(godotInputHandler, mAccelerometer, SensorManager.SENSOR_DELAY_GAME)
		}
		if (gravityEnabled.get() && mGravity != null) {
			mSensorManager?.registerListener(godotInputHandler, mGravity, SensorManager.SENSOR_DELAY_GAME)
		}
		if (magnetometerEnabled.get() && mMagnetometer != null) {
			mSensorManager?.registerListener(godotInputHandler, mMagnetometer, SensorManager.SENSOR_DELAY_GAME)
		}
		if (gyroscopeEnabled.get() && mGyroscope != null) {
			mSensorManager?.registerListener(godotInputHandler, mGyroscope, SensorManager.SENSOR_DELAY_GAME)
		}
	}

	fun onPause(host: GodotHost) {
		Log.v(TAG, "OnPause: $host")
		resumed = false
		if (host != primaryHost) {
			return
		}

		renderView?.onActivityPaused()
		mSensorManager?.unregisterListener(godotInputHandler)
		for (plugin in pluginRegistry.allPlugins) {
			plugin.onMainPause()
		}
	}

	fun onStop(host: GodotHost) {
		Log.v(TAG, "OnStop: $host")
		if (host != primaryHost) {
			return
		}

		renderView?.onActivityStopped()
	}

	fun onDestroy(primaryHost: GodotHost) {
		if (this.primaryHost != primaryHost) {
			return
		}
		Log.v(TAG, "OnDestroy: $primaryHost")

		for (plugin in pluginRegistry.allPlugins) {
			plugin.onMainDestroy()
		}

		if (renderView?.blockingExitRenderer(EXIT_RENDERER_TIMEOUT_IN_MS) != true) {
			Log.w(TAG, "Unable to exit the renderer within $EXIT_RENDERER_TIMEOUT_IN_MS ms... Force quitting the process.")
			onGodotTerminating()
			forceQuit(0)
		}

		this.primaryHost = null
	}

	/**
	 * Configuration change callback
	*/
	fun onConfigurationChanged(newConfig: Configuration) {
		renderView?.inputHandler?.onConfigurationChanged(newConfig)

		val newDarkMode = newConfig.uiMode.and(Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES
		if (darkMode != newDarkMode) {
			darkMode = newDarkMode
			runOnRenderThread {
				GodotLib.onNightModeChanged()
			}
		}

		if (currentConfig.orientation != newConfig.orientation) {
			runOnRenderThread {
				GodotLib.onScreenRotationChange(newConfig.orientation)
			}
		}
		currentConfig = newConfig
	}

	/**
	 * Activity result callback
	 */
	fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
		for (plugin in pluginRegistry.allPlugins) {
			plugin.onMainActivityResult(requestCode, resultCode, data)
		}
		runOnRenderThread {
			FilePicker.handleActivityResult(context, requestCode, resultCode, data)
		}
	}

	/**
	 * Permissions request callback
	 */
	fun onRequestPermissionsResult(
		requestCode: Int,
		permissions: Array<String?>,
		grantResults: IntArray
	) {
		for (plugin in pluginRegistry.allPlugins) {
			plugin.onMainRequestPermissionsResult(requestCode, permissions, grantResults)
		}
		runOnRenderThread {
			for (i in permissions.indices) {
				GodotLib.requestPermissionResult(
					permissions[i],
					grantResults[i] == PackageManager.PERMISSION_GRANTED
				)
			}
		}
	}

	/**
	 * Invoked on the render thread when the Godot setup is complete.
	 */
	private fun onGodotSetupCompleted() {
		Log.v(TAG, "OnGodotSetupCompleted")

		// These properties are defined after Godot setup completion, so we retrieve them here.
		val longPressEnabled = java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/pointing/android/enable_long_press_as_right_click"))
		val panScaleEnabled = java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/pointing/android/enable_pan_and_scale_gestures"))
		val rotaryInputAxisValue = GodotLib.getGlobal("input_devices/pointing/android/rotary_input_scroll_axis")
		val overrideVolumeButtons = java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/pointing/android/override_volume_buttons"))
		val scrollDeadzoneDisabled = java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/pointing/android/disable_scroll_deadzone"))

		runOnHostThread {
			renderView?.inputHandler?.apply {
				enableLongPress(longPressEnabled)
				enablePanningAndScalingGestures(panScaleEnabled)
				setOverrideVolumeButtons(overrideVolumeButtons)
				disableScrollDeadzone(scrollDeadzoneDisabled)
				try {
					setRotaryInputAxis(Integer.parseInt(rotaryInputAxisValue))
				} catch (e: NumberFormatException) {
					Log.w(TAG, e)
				}
			}
		}

		for (plugin in pluginRegistry.allPlugins) {
			plugin.onGodotSetupCompleted()
		}
		primaryHost?.onGodotSetupCompleted()
	}

	/**
	 * Invoked on the render thread when the Godot main loop has started.
	 */
	private fun onGodotMainLoopStarted() {
		Log.v(TAG, "OnGodotMainLoopStarted")
		_runStatus.set(RunStatus.STARTED)

		accelerometerEnabled.set(java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/sensors/enable_accelerometer")))
		gravityEnabled.set(java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/sensors/enable_gravity")))
		gyroscopeEnabled.set(java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/sensors/enable_gyroscope")))
		magnetometerEnabled.set(java.lang.Boolean.parseBoolean(GodotLib.getGlobal("input_devices/sensors/enable_magnetometer")))

		runOnHostThread {
			registerSensorsIfNeeded()
		}

		for (plugin in pluginRegistry.allPlugins) {
			plugin.onGodotMainLoopStarted()
		}
		primaryHost?.onGodotMainLoopStarted()
	}

	/**
	 * Invoked on the render thread when the engine is about to terminate.
	 */
	@Keep
	private fun onGodotTerminating() {
		Log.v(TAG, "OnGodotTerminating")
		_runStatus.set(RunStatus.TERMINATING)

		for (plugin in pluginRegistry.allPlugins) {
			plugin.onGodotTerminating()
		}
		runOnTerminate.get()?.run()
	}

	private fun restart() {
		primaryHost?.onGodotRestartRequested(this)
	}

	fun alert(
		@StringRes messageResId: Int,
		@StringRes titleResId: Int,
		okCallback: Runnable?
	) {
		val res: Resources = context.resources ?: return
		alert(res.getString(messageResId), res.getString(titleResId), okCallback)
	}

	@JvmOverloads
	@Keep
	fun alert(message: String, title: String, okCallback: Runnable? = null) {
		val activity = getActivity() ?: return
		runOnHostThread {
			val builder = AlertDialog.Builder(activity)
			builder.setMessage(message).setTitle(title)
			builder.setPositiveButton(
				R.string.dialog_ok
			) { dialog: DialogInterface, id: Int ->
				okCallback?.run()
				dialog.cancel()
			}
			val dialog = builder.create()
			dialog.show()
		}
	}

	/**
	 * Queue a runnable to be run on the render thread.
	 *
	 * This must be called after the render thread has started.
	 */
	fun runOnRenderThread(action: Runnable) {
		renderView?.queueOnRenderThread(action)
	}

	/**
	 * Runs the specified action on the host thread.
	 */
	fun runOnHostThread(action: Runnable) {
		primaryHost?.runOnHostThread(action)
	}

	/**
	 * Returns true if the call is being made on the Ui thread.
	 */
	private fun isOnUiThread() = Looper.myLooper() == Looper.getMainLooper()

	/**
	 * Returns true if `Vulkan` is used for rendering.
	 */
	private fun usesVulkan(): Boolean {
		val rendererInfo = GodotLib.getRendererInfo()
		var renderingDeviceSource = "ProjectSettings"
		var renderingDevice = rendererInfo[0]
		var rendererSource = "ProjectSettings"
		var renderer = rendererInfo[1]
		val cmdline = commandLine
		var index = cmdline.indexOf("--rendering-method")
		if (index > -1 && cmdline.size > index + 1) {
			rendererSource = "CommandLine"
			renderer = cmdline.get(index + 1)
		}
		index = cmdline.indexOf("--rendering-driver")
		if (index > -1 && cmdline.size > index + 1) {
			renderingDeviceSource = "CommandLine"
			renderingDevice = cmdline.get(index + 1)
		}
		val result = ("forward_plus" == renderer || "mobile" == renderer) && "vulkan" == renderingDevice
		Log.d(TAG, """usesVulkan(): ${result}
			renderingDevice: ${renderingDevice} (${renderingDeviceSource})
			renderer: ${renderer} (${rendererSource})""")
		return result
	}

	/**
	 * Returns true if can fallback to OpenGL.
	 */
	private fun canFallbackToOpenGL(): Boolean {
		return java.lang.Boolean.parseBoolean(GodotLib.getGlobal("rendering/rendering_device/fallback_to_opengl3"))
	}

	/**
	 * Returns true if the device meets the base requirements for Vulkan support, false otherwise.
	 */
	private fun meetsVulkanRequirements(packageManager: PackageManager?): Boolean {
		if (packageManager == null) {
			return false
		}
		if (!packageManager.hasSystemFeature(PackageManager.FEATURE_VULKAN_HARDWARE_LEVEL, 1)) {
			// Optional requirements.. log as warning if missing
			Log.w(TAG, "The vulkan hardware level does not meet the minimum requirement: 1")
		}

		// Check for api version 1.0
		return packageManager.hasSystemFeature(PackageManager.FEATURE_VULKAN_HARDWARE_VERSION, 0x400003)
	}

	private fun setKeepScreenOn(enabled: Boolean) {
		runOnHostThread {
			if (enabled) {
				getActivity()?.window?.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
			} else {
				getActivity()?.window?.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
			}
		}
	}

	/**
	 * Returns true if dark mode is supported, false otherwise.
	 */
	@Keep
	private fun isDarkModeSupported(): Boolean {
		return context.resources?.configuration?.uiMode?.and(Configuration.UI_MODE_NIGHT_MASK) != Configuration.UI_MODE_NIGHT_UNDEFINED
	}

	/**
	 * Returns true if dark mode is supported and enabled, false otherwise.
	 */
	@Keep
	private fun isDarkMode(): Boolean {
		return darkMode
	}

	@Keep
	fun hasClipboard(): Boolean {
		return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P || Looper.getMainLooper().thread == Thread.currentThread()) {
			hasClipboardCallable.call()
		} else {
			val task = FutureTask(hasClipboardCallable)
			runOnHostThread(task)
			task.get()
		}
	}

	@Keep
	fun getClipboard(): String {
		return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P || Looper.getMainLooper().thread == Thread.currentThread()) {
			getClipboardCallable.call()
		} else {
			val task = FutureTask(getClipboardCallable)
			runOnHostThread(task)
			task.get()
		}
	}

	@Keep
	fun setClipboard(text: String?) {
		runOnHostThread {
			mClipboard?.setPrimaryClip(ClipData.newPlainText("myLabel", text))
		}
	}

	@Keep
	private fun showFilePicker(currentDirectory: String, filename: String, fileMode: Int, filters: Array<String>) {
		FilePicker.showFilePicker(context, getActivity(), currentDirectory, filename, fileMode, filters)
	}

	/**
	 * This method shows a dialog with multiple buttons.
	 *
	 * @param title The title of the dialog.
	 * @param message The message displayed in the dialog.
	 * @param buttons An array of button labels to display.
	 */
	@Keep
	private fun showDialog(title: String, message: String, buttons: Array<String>) {
		getActivity()?.let { DialogUtils.showDialog(it, title, message, buttons) }
	}

	/**
	 * This method shows a dialog with a text input field, allowing the user to input text.
	 *
	 * @param title The title of the input dialog.
	 * @param message The message displayed in the input dialog.
	 * @param existingText The existing text that will be pre-filled in the input field.
	 */
	@Keep
	private fun showInputDialog(title: String, message: String, existingText: String) {
		getActivity()?.let { DialogUtils.showInputDialog(it, title, message, existingText) }
	}

	@Keep
	private fun getAccentColor(): Int {
		val value = TypedValue()
		context.theme.resolveAttribute(android.R.attr.colorAccent, value, true)
		return value.data
	}

	@Keep
	private fun getBaseColor(): Int {
		val value = TypedValue()
		context.theme.resolveAttribute(android.R.attr.colorBackground, value, true)
		return value.data
	}

	/**
	 * Destroys the Godot Engine and kill the process it's running in.
	 */
	@JvmOverloads
	fun destroyAndKillProcess(destroyRunnable: Runnable? = null) {
		val host = primaryHost
		if (host == null) {
			// Run the destroyRunnable right away as we are about to force quit.
			destroyRunnable?.run()

			// Fallback to force quit
			forceQuit(0)
			return
		}

		// Store the destroyRunnable so it can be run when the engine is terminating
		runOnTerminate.set(destroyRunnable)

		runOnHostThread {
			onDestroy(host)
		}
	}

	@Keep
	private fun forceQuit(instanceId: Int): Boolean {
		primaryHost?.let {
			if (instanceId == 0) {
				it.onGodotForceQuit(this)
				return true
			} else {
				return it.onGodotForceQuit(instanceId)
			}
		} ?: return false
	}

	fun onBackPressed() {
		for (plugin in pluginRegistry.allPlugins) {
			plugin.onMainBackPressed()
		}
		runOnRenderThread { GodotLib.back() }
	}

	/**
	 * Used by the native code (java_godot_wrapper.h) to vibrate the device.
	 * @param durationMs
	 */
	@SuppressLint("MissingPermission")
	@Keep
	private fun vibrate(durationMs: Int, amplitude: Int) {
		if (durationMs > 0 && requestPermission("VIBRATE")) {
			try {
				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
					if (amplitude <= -1) {
						vibratorService?.vibrate(
							VibrationEffect.createOneShot(
								durationMs.toLong(),
								VibrationEffect.DEFAULT_AMPLITUDE
							)
						)
					} else {
						vibratorService?.vibrate(
							VibrationEffect.createOneShot(
								durationMs.toLong(),
								amplitude
							)
						)
					}
				} else {
					// deprecated in API 26
					vibratorService?.vibrate(durationMs.toLong())
				}
			} catch (e: SecurityException) {
				Log.w(TAG, "SecurityException: VIBRATE permission not found. Make sure it is declared in the manifest or enabled in the export preset.")
			}
		}
	}

	/**
	 * Used by the native code (java_godot_wrapper.h) to access the input fallback mapping.
	 * @return The input fallback mapping for the current XR mode.
	 */
	@Keep
	private fun getInputFallbackMapping(): String? {
		return xrMode.inputFallbackMapping
	}

	fun requestPermission(name: String?): Boolean {
		val activity = getActivity() ?: return false
		return requestPermission(name, activity)
	}

	fun requestPermissions(): Boolean {
		return PermissionsUtil.requestManifestPermissions(getActivity())
	}

	fun getGrantedPermissions(): Array<String?>? {
		return PermissionsUtil.getGrantedPermissions(context)
	}

	/**
	 * Returns true if this is the Godot editor.
	 */
	fun isEditorHint() = isEditorBuild() && GodotLib.isEditorHint()

	/**
	 * Returns true if this is the Godot project manager.
	 */
	fun isProjectManagerHint() = isEditorBuild() && GodotLib.isProjectManagerHint()

	/**
	 * Returns true if the feature for the given feature tag is supported in the currently running instance, depending
	 * on the platform, build, etc.
	 *
	 * For reference, see https://docs.godotengine.org/en/stable/classes/class_os.html#class-os-method-has-feature
	 */
	fun hasFeature(feature: String): Boolean {
		return GodotLib.hasFeature(feature)
	}

	/**
	 * Internal method used to query whether the host or the registered plugins supports a given feature.
	 *
	 * This is invoked by the native code, and should not be confused with [hasFeature] which is the Android version of
	 * https://docs.godotengine.org/en/stable/classes/class_os.html#class-os-method-has-feature
	 */
	@Keep
	private fun checkInternalFeatureSupport(feature: String): Boolean {
		if (primaryHost?.supportsFeature(feature) == true) {
			return true
		}

		for (plugin in pluginRegistry.allPlugins) {
			if (plugin.supportsFeature(feature)) {
				return true
			}
		}
		return false
	}

	/**
	 * Get the list of gdextension modules to register.
	 */
	@Keep
	private fun getGDExtensionConfigFiles(): Array<String> {
		val configFiles = mutableSetOf<String>()
		for (plugin in pluginRegistry.allPlugins) {
			configFiles.addAll(plugin.pluginGDExtensionLibrariesPaths)
		}

		return configFiles.toTypedArray()
	}

	@Keep
	private fun getCACertificates(): String {
		return GodotNetUtils.getCACertificates()
	}

	private fun obbIsCorrupted(f: String, mainPackMd5: String): Boolean {
		return try {
			val fis: InputStream = FileInputStream(f)

			// Create MD5 Hash
			val buffer = ByteArray(16384)
			val complete = MessageDigest.getInstance("MD5")
			var numRead: Int
			do {
				numRead = fis.read(buffer)
				if (numRead > 0) {
					complete.update(buffer, 0, numRead)
				}
			} while (numRead != -1)
			fis.close()
			val messageDigest = complete.digest()

			// Create Hex String
			val hexString = StringBuilder()
			for (b in messageDigest) {
				var s = Integer.toHexString(0xFF and b.toInt())
				if (s.length == 1) {
					s = "0$s"
				}
				hexString.append(s)
			}
			val md5str = hexString.toString()
			md5str != mainPackMd5
		} catch (e: java.lang.Exception) {
			e.printStackTrace()
			true
		}
	}

	@Keep
	private fun initInputDevices() {
		godotInputHandler.initInputDevices()
	}

	@Keep
	private fun createNewGodotInstance(args: Array<String>): Int {
		return primaryHost?.onNewGodotInstanceRequested(args) ?: -1
	}

	@Keep
	private fun nativeBeginBenchmarkMeasure(scope: String, label: String) {
		beginBenchmarkMeasure(scope, label)
	}

	@Keep
	private fun nativeEndBenchmarkMeasure(scope: String, label: String) {
		endBenchmarkMeasure(scope, label)
	}

	@Keep
	private fun nativeDumpBenchmark(benchmarkFile: String) {
		dumpBenchmark(fileAccessHandler, benchmarkFile)
	}

	@Keep
	private fun nativeSignApk(inputPath: String,
							  outputPath: String,
							  keystorePath: String,
							  keystoreUser: String,
							  keystorePassword: String): Int {
		val signResult = primaryHost?.signApk(inputPath, outputPath, keystorePath, keystoreUser, keystorePassword) ?: Error.ERR_UNAVAILABLE
		return signResult.toNativeValue()
	}

	@Keep
	private fun nativeVerifyApk(apkPath: String): Int {
		val verifyResult = primaryHost?.verifyApk(apkPath) ?: Error.ERR_UNAVAILABLE
		return verifyResult.toNativeValue()
	}

	@Keep
	private fun nativeOnEditorWorkspaceSelected(workspace: String) {
		primaryHost?.onEditorWorkspaceSelected(workspace)
	}

	@Keep
	private fun nativeBuildEnvConnect(callback: GodotCallable): Boolean {
		try {
			val buildProvider = primaryHost?.getBuildProvider()
			return buildProvider?.buildEnvConnect(callback) ?: false
		} catch (e: Exception) {
			Log.e(TAG, "Unable to connect to build environment", e)
			return false
		}
	}

	@Keep
	private fun nativeBuildEnvDisconnect() {
		try {
			val buildProvider = primaryHost?.getBuildProvider()
			buildProvider?.buildEnvDisconnect()
		} catch (e: Exception) {
			Log.e(TAG, "Unable to disconnect from build environment", e)
		}
	}

	@Keep
	private fun nativeBuildEnvExecute(buildTool: String, arguments: Array<String>, projectPath: String, buildDir: String, outputCallback: GodotCallable, resultCallback: GodotCallable): Int {
		try {
			val buildProvider = primaryHost?.getBuildProvider()
			return buildProvider?.buildEnvExecute(
				buildTool,
				arguments,
				projectPath,
				buildDir,
				outputCallback,
				resultCallback
			) ?: -1
		} catch (e: Exception) {
			Log.e(TAG, "Unable to execute Gradle command in build environment", e);
			return -1
		}
	}

	@Keep
	private fun nativeBuildEnvCancel(jobId: Int) {
		try {
			val buildProvider = primaryHost?.getBuildProvider()
			buildProvider?.buildEnvCancel(jobId)
		} catch (e: Exception) {
			Log.e(TAG, "Unable to cancel command in build environment", e)
		}
	}

	@Keep
	private fun nativeBuildEnvCleanProject(projectPath: String, buildDir: String, callback: GodotCallable) {
		try {
			val buildProvider = primaryHost?.getBuildProvider()
			buildProvider?.buildEnvCleanProject(projectPath, buildDir, callback)
		} catch(e: Exception) {
			Log.e(TAG, "Unable to clean project in build environment", e)
		}
	}

}
