/*************************************************************************/
/*  display_server_android.cpp                                           */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
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/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/*************************************************************************/

#include "display_server_android.h"

#include "core/config/project_settings.h"
#include "java_godot_io_wrapper.h"
#include "java_godot_wrapper.h"
#include "os_android.h"
#include "tts_android.h"

#if defined(VULKAN_ENABLED)
#include "drivers/vulkan/rendering_device_vulkan.h"
#include "platform/android/vulkan/vulkan_context_android.h"
#include "servers/rendering/renderer_rd/renderer_compositor_rd.h"
#endif

DisplayServerAndroid *DisplayServerAndroid::get_singleton() {
	return static_cast<DisplayServerAndroid *>(DisplayServer::get_singleton());
}

bool DisplayServerAndroid::has_feature(Feature p_feature) const {
	switch (p_feature) {
		case FEATURE_CURSOR_SHAPE:
		//case FEATURE_CUSTOM_CURSOR_SHAPE:
		//case FEATURE_GLOBAL_MENU:
		//case FEATURE_HIDPI:
		//case FEATURE_ICON:
		//case FEATURE_IME:
		case FEATURE_MOUSE:
		//case FEATURE_MOUSE_WARP:
		//case FEATURE_NATIVE_DIALOG:
		//case FEATURE_NATIVE_ICON:
		//case FEATURE_WINDOW_TRANSPARENCY:
		case FEATURE_CLIPBOARD:
		case FEATURE_KEEP_SCREEN_ON:
		case FEATURE_ORIENTATION:
		case FEATURE_TOUCHSCREEN:
		case FEATURE_VIRTUAL_KEYBOARD:
		case FEATURE_TEXT_TO_SPEECH:
			return true;
		default:
			return false;
	}
}

String DisplayServerAndroid::get_name() const {
	return "Android";
}

bool DisplayServerAndroid::tts_is_speaking() const {
	return TTS_Android::is_speaking();
}

bool DisplayServerAndroid::tts_is_paused() const {
	return TTS_Android::is_paused();
}

TypedArray<Dictionary> DisplayServerAndroid::tts_get_voices() const {
	return TTS_Android::get_voices();
}

void DisplayServerAndroid::tts_speak(const String &p_text, const String &p_voice, int p_volume, float p_pitch, float p_rate, int p_utterance_id, bool p_interrupt) {
	TTS_Android::speak(p_text, p_voice, p_volume, p_pitch, p_rate, p_utterance_id, p_interrupt);
}

void DisplayServerAndroid::tts_pause() {
	TTS_Android::pause();
}

void DisplayServerAndroid::tts_resume() {
	TTS_Android::resume();
}

void DisplayServerAndroid::tts_stop() {
	TTS_Android::stop();
}

void DisplayServerAndroid::clipboard_set(const String &p_text) {
	GodotJavaWrapper *godot_java = OS_Android::get_singleton()->get_godot_java();
	ERR_FAIL_NULL(godot_java);

	if (godot_java->has_set_clipboard()) {
		godot_java->set_clipboard(p_text);
	} else {
		DisplayServer::clipboard_set(p_text);
	}
}

String DisplayServerAndroid::clipboard_get() const {
	GodotJavaWrapper *godot_java = OS_Android::get_singleton()->get_godot_java();
	ERR_FAIL_NULL_V(godot_java, String());

	if (godot_java->has_get_clipboard()) {
		return godot_java->get_clipboard();
	} else {
		return DisplayServer::clipboard_get();
	}
}

bool DisplayServerAndroid::clipboard_has() const {
	GodotJavaWrapper *godot_java = OS_Android::get_singleton()->get_godot_java();
	ERR_FAIL_NULL_V(godot_java, false);

	if (godot_java->has_has_clipboard()) {
		return godot_java->has_clipboard();
	} else {
		return DisplayServer::clipboard_has();
	}
}

TypedArray<Rect2> DisplayServerAndroid::get_display_cutouts() const {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL_V(godot_io_java, Array());
	return godot_io_java->get_display_cutouts();
}

Rect2i DisplayServerAndroid::get_display_safe_area() const {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL_V(godot_io_java, Rect2i());
	return godot_io_java->get_display_safe_area();
}

void DisplayServerAndroid::screen_set_keep_on(bool p_enable) {
	GodotJavaWrapper *godot_java = OS_Android::get_singleton()->get_godot_java();
	ERR_FAIL_NULL(godot_java);

	godot_java->set_keep_screen_on(p_enable);
	keep_screen_on = p_enable;
}

bool DisplayServerAndroid::screen_is_kept_on() const {
	return keep_screen_on;
}

void DisplayServerAndroid::screen_set_orientation(DisplayServer::ScreenOrientation p_orientation, int p_screen) {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL(godot_io_java);

	godot_io_java->set_screen_orientation(p_orientation);
}

DisplayServer::ScreenOrientation DisplayServerAndroid::screen_get_orientation(int p_screen) const {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL_V(godot_io_java, SCREEN_LANDSCAPE);

	const int orientation = godot_io_java->get_screen_orientation();
	ERR_FAIL_INDEX_V_MSG(orientation, 7, SCREEN_LANDSCAPE, "Unrecognized screen orientation");
	return (ScreenOrientation)orientation;
}

int DisplayServerAndroid::get_screen_count() const {
	return 1;
}

Point2i DisplayServerAndroid::screen_get_position(int p_screen) const {
	return Point2i(0, 0);
}

Size2i DisplayServerAndroid::screen_get_size(int p_screen) const {
	return OS_Android::get_singleton()->get_display_size();
}

Rect2i DisplayServerAndroid::screen_get_usable_rect(int p_screen) const {
	Size2i display_size = OS_Android::get_singleton()->get_display_size();
	return Rect2i(0, 0, display_size.width, display_size.height);
}

int DisplayServerAndroid::screen_get_dpi(int p_screen) const {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL_V(godot_io_java, 0);

	return godot_io_java->get_screen_dpi();
}

float DisplayServerAndroid::screen_get_scale(int p_screen) const {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL_V(godot_io_java, 1.0f);

	return godot_io_java->get_scaled_density();
}

float DisplayServerAndroid::screen_get_refresh_rate(int p_screen) const {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	if (!godot_io_java) {
		ERR_PRINT("An error occurred while trying to get the screen refresh rate.");
		return SCREEN_REFRESH_RATE_FALLBACK;
	}

	return godot_io_java->get_screen_refresh_rate(SCREEN_REFRESH_RATE_FALLBACK);
}

bool DisplayServerAndroid::screen_is_touchscreen(int p_screen) const {
	return true;
}

void DisplayServerAndroid::virtual_keyboard_show(const String &p_existing_text, const Rect2 &p_screen_rect, VirtualKeyboardType p_type, int p_max_length, int p_cursor_start, int p_cursor_end) {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL(godot_io_java);

	if (godot_io_java->has_vk()) {
		godot_io_java->show_vk(p_existing_text, (int)p_type, p_max_length, p_cursor_start, p_cursor_end);
	} else {
		ERR_PRINT("Virtual keyboard not available");
	}
}

void DisplayServerAndroid::virtual_keyboard_hide() {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL(godot_io_java);

	if (godot_io_java->has_vk()) {
		godot_io_java->hide_vk();
	} else {
		ERR_PRINT("Virtual keyboard not available");
	}
}

int DisplayServerAndroid::virtual_keyboard_get_height() const {
	GodotIOJavaWrapper *godot_io_java = OS_Android::get_singleton()->get_godot_io_java();
	ERR_FAIL_NULL_V(godot_io_java, 0);

	return godot_io_java->get_vk_height();
}

void DisplayServerAndroid::window_set_window_event_callback(const Callable &p_callable, DisplayServer::WindowID p_window) {
	window_event_callback = p_callable;
}

void DisplayServerAndroid::window_set_input_event_callback(const Callable &p_callable, DisplayServer::WindowID p_window) {
	input_event_callback = p_callable;
}

void DisplayServerAndroid::window_set_input_text_callback(const Callable &p_callable, DisplayServer::WindowID p_window) {
	input_text_callback = p_callable;
}

void DisplayServerAndroid::window_set_rect_changed_callback(const Callable &p_callable, DisplayServer::WindowID p_window) {
	rect_changed_callback = p_callable;
}

void DisplayServerAndroid::window_set_drop_files_callback(const Callable &p_callable, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

void DisplayServerAndroid::_window_callback(const Callable &p_callable, const Variant &p_arg, bool p_deferred) const {
	if (!p_callable.is_null()) {
		const Variant *argp = &p_arg;
		Variant ret;
		Callable::CallError ce;
		if (p_deferred) {
			p_callable.callp((const Variant **)&argp, 1, ret, ce);
		} else {
			p_callable.call_deferredp((const Variant **)&argp, 1);
		}
	}
}

void DisplayServerAndroid::send_window_event(DisplayServer::WindowEvent p_event, bool p_deferred) const {
	_window_callback(window_event_callback, int(p_event), p_deferred);
}

void DisplayServerAndroid::send_input_event(const Ref<InputEvent> &p_event) const {
	_window_callback(input_event_callback, p_event);
}

void DisplayServerAndroid::send_input_text(const String &p_text) const {
	_window_callback(input_text_callback, p_text);
}

void DisplayServerAndroid::_dispatch_input_events(const Ref<InputEvent> &p_event) {
	DisplayServerAndroid::get_singleton()->send_input_event(p_event);
}

Vector<DisplayServer::WindowID> DisplayServerAndroid::get_window_list() const {
	Vector<WindowID> ret;
	ret.push_back(MAIN_WINDOW_ID);
	return ret;
}

DisplayServer::WindowID DisplayServerAndroid::get_window_at_screen_position(const Point2i &p_position) const {
	return MAIN_WINDOW_ID;
}

int64_t DisplayServerAndroid::window_get_native_handle(HandleType p_handle_type, WindowID p_window) const {
	ERR_FAIL_COND_V(p_window != MAIN_WINDOW_ID, 0);
	switch (p_handle_type) {
		case DISPLAY_HANDLE: {
			return 0; // Not supported.
		}
		case WINDOW_HANDLE: {
			return reinterpret_cast<int64_t>(static_cast<OS_Android *>(OS::get_singleton())->get_godot_java()->get_activity());
		}
		case WINDOW_VIEW: {
			return 0; // Not supported.
		}
		default: {
			return 0;
		}
	}
}

void DisplayServerAndroid::window_attach_instance_id(ObjectID p_instance, DisplayServer::WindowID p_window) {
	window_attached_instance_id = p_instance;
}

ObjectID DisplayServerAndroid::window_get_attached_instance_id(DisplayServer::WindowID p_window) const {
	return window_attached_instance_id;
}

void DisplayServerAndroid::window_set_title(const String &p_title, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

int DisplayServerAndroid::window_get_current_screen(DisplayServer::WindowID p_window) const {
	return SCREEN_OF_MAIN_WINDOW;
}

void DisplayServerAndroid::window_set_current_screen(int p_screen, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

Point2i DisplayServerAndroid::window_get_position(DisplayServer::WindowID p_window) const {
	return Point2i();
}

void DisplayServerAndroid::window_set_position(const Point2i &p_position, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

void DisplayServerAndroid::window_set_transient(DisplayServer::WindowID p_window, DisplayServer::WindowID p_parent) {
	// Not supported on Android.
}

void DisplayServerAndroid::window_set_max_size(const Size2i p_size, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

Size2i DisplayServerAndroid::window_get_max_size(DisplayServer::WindowID p_window) const {
	return Size2i();
}

void DisplayServerAndroid::window_set_min_size(const Size2i p_size, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

Size2i DisplayServerAndroid::window_get_min_size(DisplayServer::WindowID p_window) const {
	return Size2i();
}

void DisplayServerAndroid::window_set_size(const Size2i p_size, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

Size2i DisplayServerAndroid::window_get_size(DisplayServer::WindowID p_window) const {
	return OS_Android::get_singleton()->get_display_size();
}

Size2i DisplayServerAndroid::window_get_real_size(DisplayServer::WindowID p_window) const {
	return OS_Android::get_singleton()->get_display_size();
}

void DisplayServerAndroid::window_set_mode(DisplayServer::WindowMode p_mode, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

DisplayServer::WindowMode DisplayServerAndroid::window_get_mode(DisplayServer::WindowID p_window) const {
	return WINDOW_MODE_FULLSCREEN;
}

bool DisplayServerAndroid::window_is_maximize_allowed(DisplayServer::WindowID p_window) const {
	return false;
}

void DisplayServerAndroid::window_set_flag(DisplayServer::WindowFlags p_flag, bool p_enabled, DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

bool DisplayServerAndroid::window_get_flag(DisplayServer::WindowFlags p_flag, DisplayServer::WindowID p_window) const {
	return false;
}

void DisplayServerAndroid::window_request_attention(DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

void DisplayServerAndroid::window_move_to_foreground(DisplayServer::WindowID p_window) {
	// Not supported on Android.
}

bool DisplayServerAndroid::window_can_draw(DisplayServer::WindowID p_window) const {
	return true;
}

bool DisplayServerAndroid::can_any_window_draw() const {
	return true;
}

void DisplayServerAndroid::process_events() {
	Input::get_singleton()->flush_buffered_events();
}

Vector<String> DisplayServerAndroid::get_rendering_drivers_func() {
	Vector<String> drivers;

#ifdef GLES3_ENABLED
	drivers.push_back("opengl3");
#endif
#ifdef VULKAN_ENABLED
	drivers.push_back("vulkan");
#endif

	return drivers;
}

DisplayServer *DisplayServerAndroid::create_func(const String &p_rendering_driver, DisplayServer::WindowMode p_mode, DisplayServer::VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i *p_position, const Vector2i &p_resolution, Error &r_error) {
	DisplayServer *ds = memnew(DisplayServerAndroid(p_rendering_driver, p_mode, p_vsync_mode, p_flags, p_position, p_resolution, r_error));
	if (r_error != OK) {
		OS::get_singleton()->alert("Your video card driver does not support any of the supported Vulkan versions.", "Unable to initialize Video driver");
	}
	return ds;
}

void DisplayServerAndroid::register_android_driver() {
	register_create_function("android", create_func, get_rendering_drivers_func);
}

void DisplayServerAndroid::reset_window() {
#if defined(VULKAN_ENABLED)
	if (rendering_driver == "vulkan") {
		ANativeWindow *native_window = OS_Android::get_singleton()->get_native_window();
		ERR_FAIL_NULL(native_window);

		ERR_FAIL_NULL(context_vulkan);
		VSyncMode last_vsync_mode = context_vulkan->get_vsync_mode(MAIN_WINDOW_ID);
		context_vulkan->window_destroy(MAIN_WINDOW_ID);

		Size2i display_size = OS_Android::get_singleton()->get_display_size();
		if (context_vulkan->window_create(native_window, last_vsync_mode, display_size.width, display_size.height) != OK) {
			memdelete(context_vulkan);
			context_vulkan = nullptr;
			ERR_FAIL_MSG("Failed to reset Vulkan window.");
		}
	}
#endif
}

void DisplayServerAndroid::notify_surface_changed(int p_width, int p_height) {
	if (rect_changed_callback.is_null()) {
		return;
	}

	const Variant size = Rect2i(0, 0, p_width, p_height);
	const Variant *sizep = &size;
	Variant ret;
	Callable::CallError ce;

	rect_changed_callback.callp(reinterpret_cast<const Variant **>(&sizep), 1, ret, ce);
}

DisplayServerAndroid::DisplayServerAndroid(const String &p_rendering_driver, DisplayServer::WindowMode p_mode, DisplayServer::VSyncMode p_vsync_mode, uint32_t p_flags, const Vector2i *p_position, const Vector2i &p_resolution, Error &r_error) {
	rendering_driver = p_rendering_driver;

	// TODO: rendering_driver is broken, change when different drivers are supported again
	rendering_driver = "vulkan";

	keep_screen_on = GLOBAL_GET("display/window/energy_saving/keep_screen_on");

#if defined(GLES3_ENABLED)
	if (rendering_driver == "opengl3") {
		bool gl_initialization_error = false;

		if (RasterizerGLES3::is_viable() == OK) {
			RasterizerGLES3::register_config();
			RasterizerGLES3::make_current();
		} else {
			gl_initialization_error = true;
		}

		if (gl_initialization_error) {
			OS::get_singleton()->alert("Your device does not support any of the supported OpenGL versions.\n"
									   "Please try updating your Android version.",
					"Unable to initialize video driver");
			return;
		}
	}
#endif

#if defined(VULKAN_ENABLED)
	context_vulkan = nullptr;
	rendering_device_vulkan = nullptr;

	if (rendering_driver == "vulkan") {
		ANativeWindow *native_window = OS_Android::get_singleton()->get_native_window();
		ERR_FAIL_NULL(native_window);

		context_vulkan = memnew(VulkanContextAndroid);
		if (context_vulkan->initialize() != OK) {
			memdelete(context_vulkan);
			context_vulkan = nullptr;
			ERR_FAIL_MSG("Failed to initialize Vulkan context");
		}

		Size2i display_size = OS_Android::get_singleton()->get_display_size();
		if (context_vulkan->window_create(native_window, p_vsync_mode, display_size.width, display_size.height) != OK) {
			memdelete(context_vulkan);
			context_vulkan = nullptr;
			ERR_FAIL_MSG("Failed to create Vulkan window.");
		}

		rendering_device_vulkan = memnew(RenderingDeviceVulkan);
		rendering_device_vulkan->initialize(context_vulkan);

		RendererCompositorRD::make_current();
	}
#endif

	Input::get_singleton()->set_event_dispatch_function(_dispatch_input_events);
	Input::get_singleton()->set_use_input_buffering(true); // Needed because events will come directly from the UI thread

	r_error = OK;
}

DisplayServerAndroid::~DisplayServerAndroid() {
#if defined(VULKAN_ENABLED)
	if (rendering_driver == "vulkan") {
		if (rendering_device_vulkan) {
			rendering_device_vulkan->finalize();
			memdelete(rendering_device_vulkan);
		}

		if (context_vulkan) {
			memdelete(context_vulkan);
		}
	}
#endif
}

void DisplayServerAndroid::process_accelerometer(const Vector3 &p_accelerometer) {
	Input::get_singleton()->set_accelerometer(p_accelerometer);
}

void DisplayServerAndroid::process_gravity(const Vector3 &p_gravity) {
	Input::get_singleton()->set_gravity(p_gravity);
}

void DisplayServerAndroid::process_magnetometer(const Vector3 &p_magnetometer) {
	Input::get_singleton()->set_magnetometer(p_magnetometer);
}

void DisplayServerAndroid::process_gyroscope(const Vector3 &p_gyroscope) {
	Input::get_singleton()->set_gyroscope(p_gyroscope);
}

void DisplayServerAndroid::mouse_set_mode(MouseMode p_mode) {
	if (!OS_Android::get_singleton()->get_godot_java()->get_godot_view()->can_update_pointer_icon() || !OS_Android::get_singleton()->get_godot_java()->get_godot_view()->can_capture_pointer()) {
		return;
	}
	if (mouse_mode == p_mode) {
		return;
	}

	if (p_mode == MouseMode::MOUSE_MODE_HIDDEN) {
		OS_Android::get_singleton()->get_godot_java()->get_godot_view()->set_pointer_icon(CURSOR_TYPE_NULL);
	} else {
		cursor_set_shape(cursor_shape);
	}

	if (p_mode == MouseMode::MOUSE_MODE_CAPTURED) {
		OS_Android::get_singleton()->get_godot_java()->get_godot_view()->request_pointer_capture();
	} else {
		OS_Android::get_singleton()->get_godot_java()->get_godot_view()->release_pointer_capture();
	}

	mouse_mode = p_mode;
}

DisplayServer::MouseMode DisplayServerAndroid::mouse_get_mode() const {
	return mouse_mode;
}

Point2i DisplayServerAndroid::mouse_get_position() const {
	return Input::get_singleton()->get_mouse_position();
}

MouseButton DisplayServerAndroid::mouse_get_button_state() const {
	return (MouseButton)Input::get_singleton()->get_mouse_button_mask();
}

void DisplayServerAndroid::cursor_set_shape(DisplayServer::CursorShape p_shape) {
	if (!OS_Android::get_singleton()->get_godot_java()->get_godot_view()->can_update_pointer_icon()) {
		return;
	}
	if (cursor_shape == p_shape) {
		return;
	}

	cursor_shape = p_shape;

	if (mouse_mode == MouseMode::MOUSE_MODE_VISIBLE || mouse_mode == MouseMode::MOUSE_MODE_CONFINED) {
		OS_Android::get_singleton()->get_godot_java()->get_godot_view()->set_pointer_icon(android_cursors[cursor_shape]);
	}
}

DisplayServer::CursorShape DisplayServerAndroid::cursor_get_shape() const {
	return cursor_shape;
}

void DisplayServerAndroid::window_set_vsync_mode(DisplayServer::VSyncMode p_vsync_mode, WindowID p_window) {
#if defined(VULKAN_ENABLED)
	context_vulkan->set_vsync_mode(p_window, p_vsync_mode);
#endif
}

DisplayServer::VSyncMode DisplayServerAndroid::window_get_vsync_mode(WindowID p_window) const {
#if defined(VULKAN_ENABLED)
	return context_vulkan->get_vsync_mode(p_window);
#else
	return DisplayServer::VSYNC_ENABLED;
#endif
}