/*
 * Copyright (c) 2012-2017 Daniele Bartolini and individual contributors.
 * License: https://github.com/taylor001/crown/blob/master/LICENSE
 */

#include "array.h"
#include "audio.h"
#include "config.h"
#include "config_resource.h"
#include "console_api.h"
#include "console_server.h"
#include "data_compiler.h"
#include "device.h"
#include "device_event_queue.h"
#include "file.h"
#include "filesystem.h"
#include "filesystem_apk.h"
#include "filesystem_disk.h"
#include "font_resource.h"
#include "input_device.h"
#include "input_manager.h"
#include "json_object.h"
#include "level_resource.h"
#include "log.h"
#include "lua_environment.h"
#include "lua_resource.h"
#include "map.h"
#include "material_manager.h"
#include "material_resource.h"
#include "matrix4x4.h"
#include "memory.h"
#include "mesh_resource.h"
#include "os.h"
#include "package_resource.h"
#include "path.h"
#include "physics.h"
#include "physics_resource.h"
#include "profiler.h"
#include "proxy_allocator.h"
#include "resource_loader.h"
#include "resource_manager.h"
#include "resource_package.h"
#include "shader_manager.h"
#include "shader_resource.h"
#include "sjson.h"
#include "sound_resource.h"
#include "sprite_resource.h"
#include "string_stream.h"
#include "string_utils.h"
#include "temp_allocator.h"
#include "texture_resource.h"
#include "types.h"
#include "unit_manager.h"
#include "unit_resource.h"
#include "vector3.h"
#include "world.h"
#include <bgfx/bgfx.h>
#include <bx/allocator.h>

#define MAX_SUBSYSTEMS_HEAP 8 * 1024 * 1024

namespace crown
{
extern bool next_event(OsEvent& ev);

struct BgfxCallback : public bgfx::CallbackI
{
	virtual void fatal(bgfx::Fatal::Enum _code, const char* _str)
	{
		CE_ASSERT(false, "Fatal error: 0x%08x: %s", _code, _str);
		CE_UNUSED(_code);
		CE_UNUSED(_str);
	}

	virtual void traceVargs(const char* /*_filePath*/, u16 /*_line*/, const char* _format, va_list _argList)
	{
		char buf[2048];
		strncpy(buf, _format, sizeof(buf));
		buf[strlen32(buf)-1] = '\0'; // Remove trailing newline
		logdv(buf, _argList);
	}

	virtual u32 cacheReadSize(u64 /*_id*/)
	{
		return 0;
	}

	virtual bool cacheRead(u64 /*_id*/, void* /*_data*/, u32 /*_size*/)
	{
		return false;
	}

	virtual void cacheWrite(u64 /*_id*/, const void* /*_data*/, u32 /*_size*/)
	{
	}

	virtual void screenShot(const char* /*_filePath*/, u32 /*_width*/, u32 /*_height*/, u32 /*_pitch*/, const void* /*_data*/, u32 /*_size*/, bool /*_yflip*/)
	{
	}

	virtual void captureBegin(u32 /*_width*/, u32 /*_height*/, u32 /*_pitch*/, bgfx::TextureFormat::Enum /*_format*/, bool /*_yflip*/)
	{
	}

	virtual void captureEnd()
	{
	}

	virtual void captureFrame(const void* /*_data*/, u32 /*_size*/)
	{
	}
};

struct BgfxAllocator : public bx::AllocatorI
{
	BgfxAllocator(Allocator& a)
		: _allocator(a, "bgfx")
	{
	}

	virtual void* realloc(void* _ptr, size_t _size, size_t _align, const char* /*_file*/, u32 /*_line*/)
	{
		if (!_ptr)
			return _allocator.allocate((u32)_size, (u32)_align == 0 ? 1 : (u32)_align);

		if (_size == 0)
		{
			_allocator.deallocate(_ptr);
			return NULL;
		}

		// Realloc
		void* p = _allocator.allocate((u32)_size, (u32)_align == 0 ? 1 : (u32)_align);
		_allocator.deallocate(_ptr);
		return p;
	}

private:

	ProxyAllocator _allocator;
};

Device::Device(const DeviceOptions& opts)
	: _allocator(default_allocator(), MAX_SUBSYSTEMS_HEAP)
	, _device_options(opts)
	, _boot_config(default_allocator())
	, _console_server(NULL)
	, _data_compiler(NULL)
	, _bundle_filesystem(NULL)
	, _last_log(NULL)
	, _resource_loader(NULL)
	, _resource_manager(NULL)
	, _bgfx_allocator(NULL)
	, _bgfx_callback(NULL)
	, _shader_manager(NULL)
	, _material_manager(NULL)
	, _input_manager(NULL)
	, _unit_manager(NULL)
	, _lua_environment(NULL)
	, _display(NULL)
	, _window(NULL)
	, _worlds(default_allocator())
	, _width(0)
	, _height(0)
	, _quit(false)
	, _paused(false)
	, _frame_count(0)
	, _last_delta_time(0.0f)
	, _time_since_start(0.0)
{
}

bool Device::process_events(s16& mouse_x, s16& mouse_y, s16& mouse_last_x, s16& mouse_last_y, bool vsync)
{
	InputManager* im = _input_manager;
	bool exit = false;
	bool reset = false;

	OsEvent event;
	while(next_event(event))
	{
		if (event.type == OsEventType::NONE)
			continue;

		switch (event.type)
		{
		case OsEventType::BUTTON:
			{
				const ButtonEvent ev = event.button;
				switch (ev.device_id)
				{
				case InputDeviceType::KEYBOARD:
					im->keyboard()->set_button_state(ev.button_num, ev.pressed);
					break;

				case InputDeviceType::MOUSE:
					im->mouse()->set_button_state(ev.button_num, ev.pressed);
					break;

				case InputDeviceType::TOUCHSCREEN:
					im->touch()->set_button_state(ev.button_num, ev.pressed);
					break;

				case InputDeviceType::JOYPAD:
					im->joypad(ev.device_num)->set_button_state(ev.button_num, ev.pressed);
					break;
				}
			}
			break;

		case OsEventType::AXIS:
			{
				const AxisEvent ev = event.axis;
				switch (ev.device_id)
				{
				case InputDeviceType::MOUSE:
					im->mouse()->set_axis(ev.axis_num, vector3(ev.axis_x, ev.axis_y, ev.axis_z));
					if (ev.axis_num == MouseAxis::CURSOR)
					{
						mouse_x = (s16)ev.axis_x;
						mouse_y = (s16)ev.axis_y;
					}
					break;

				case InputDeviceType::JOYPAD:
					im->joypad(ev.device_num)->set_axis(ev.axis_num, vector3(ev.axis_x, ev.axis_y, ev.axis_z));
					break;
				}
			}
			break;

		case OsEventType::STATUS:
			{
				const StatusEvent ev = event.status;
				switch (ev.device_id)
				{
				case InputDeviceType::JOYPAD:
					im->joypad(ev.device_num)->set_connected(ev.connected);
					break;
				}
			}
			break;

		case OsEventType::RESOLUTION:
			{
				const ResolutionEvent& ev = event.resolution;
				_width  = ev.width;
				_height = ev.height;
				reset   = true;
			}
			break;

		case OsEventType::EXIT:
			exit = true;
			break;

		case OsEventType::PAUSE:
			pause();
			break;

		case OsEventType::RESUME:
			unpause();
			break;

		default:
			CE_FATAL("Unknown OS event");
			break;
		}
	}

	const s16 dt_x = mouse_x - mouse_last_x;
	const s16 dt_y = mouse_y - mouse_last_y;
	im->mouse()->set_axis(MouseAxis::CURSOR_DELTA, vector3(dt_x, dt_y, 0.0f));
	mouse_last_x = mouse_x;
	mouse_last_y = mouse_y;

	if (reset)
		bgfx::reset(_width, _height, (vsync ? BGFX_RESET_VSYNC : BGFX_RESET_NONE));

	return exit;
}

void Device::run()
{
	_console_server = CE_NEW(_allocator, ConsoleServer)(default_allocator());
	load_console_api(*_console_server);

	namespace cor = config_resource_internal;
	namespace ftr = font_resource_internal;
	namespace lur = lua_resource_internal;
	namespace lvr = level_resource_internal;
	namespace mhr = mesh_resource_internal;
	namespace mtr = material_resource_internal;
	namespace pcr = physics_config_resource_internal;
	namespace phr = physics_resource_internal;
	namespace pkr = package_resource_internal;
	namespace sar = sprite_animation_resource_internal;
	namespace sdr = sound_resource_internal;
	namespace shr = shader_resource_internal;
	namespace spr = sprite_resource_internal;
	namespace txr = texture_resource_internal;
	namespace utr = unit_resource_internal;

	bool do_continue = true;

#if CROWN_PLATFORM_LINUX || CROWN_PLATFORM_WINDOWS
	if (_device_options._do_compile || _device_options._server)
	{
		_data_compiler = CE_NEW(_allocator, DataCompiler)();
		_data_compiler->register_compiler(RESOURCE_TYPE_CONFIG,           RESOURCE_VERSION_CONFIG,           cor::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_FONT,             RESOURCE_VERSION_FONT,             ftr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_LEVEL,            RESOURCE_VERSION_LEVEL,            lvr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_MATERIAL,         RESOURCE_VERSION_MATERIAL,         mtr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_MESH,             RESOURCE_VERSION_MESH,             mhr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_PACKAGE,          RESOURCE_VERSION_PACKAGE,          pkr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_PHYSICS,          RESOURCE_VERSION_PHYSICS,          phr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_PHYSICS_CONFIG,   RESOURCE_VERSION_PHYSICS_CONFIG,   pcr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_SCRIPT,           RESOURCE_VERSION_SCRIPT,           lur::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_SHADER,           RESOURCE_VERSION_SHADER,           shr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_SOUND,            RESOURCE_VERSION_SOUND,            sdr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_SPRITE,           RESOURCE_VERSION_SPRITE,           spr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_SPRITE_ANIMATION, RESOURCE_VERSION_SPRITE_ANIMATION, sar::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_TEXTURE,          RESOURCE_VERSION_TEXTURE,          txr::compile);
		_data_compiler->register_compiler(RESOURCE_TYPE_UNIT,             RESOURCE_VERSION_UNIT,             utr::compile);

		_data_compiler->map_source_dir("", _device_options._source_dir);

		if (_device_options._map_source_dir_name)
		{
			_data_compiler->map_source_dir(_device_options._map_source_dir_name
				, _device_options._map_source_dir_prefix
				);
		}

		_data_compiler->scan();

		if (_device_options._server)
		{
			_console_server->listen(CROWN_DEFAULT_COMPILER_PORT, false);

			while (true)
			{
				_console_server->update();
				os::sleep(60);
			}
		}
		else
		{
			const char* data_dir = _device_options._data_dir;
			const char* platform = _device_options._platform;
			do_continue = _data_compiler->compile(data_dir, platform);
			do_continue = do_continue && _device_options._do_continue;
		}
	}
#endif // CROWN_PLATFORM_LINUX || CROWN_PLATFORM_WINDOWS

	if (do_continue)
	{
		_console_server->listen(_device_options._console_port, _device_options._wait_console);

#if CROWN_PLATFORM_ANDROID
		_bundle_filesystem = CE_NEW(_allocator, FilesystemApk)(default_allocator(), const_cast<AAssetManager*>((AAssetManager*)_device_options._asset_manager));
#else
		const char* data_dir = _device_options._data_dir;
		if (!data_dir)
		{
			char buf[1024];
			data_dir = os::getcwd(buf, sizeof(buf));
		}
		_bundle_filesystem = CE_NEW(_allocator, FilesystemDisk)(default_allocator());
		((FilesystemDisk*)_bundle_filesystem)->set_prefix(data_dir);
		if (!_bundle_filesystem->exists(data_dir))
			_bundle_filesystem->create_directory(data_dir);

		_last_log = _bundle_filesystem->open(CROWN_LAST_LOG, FileOpenMode::WRITE);
#endif // CROWN_PLATFORM_ANDROID

		logi("Initializing Crown Engine %s...", version());

		profiler_globals::init();

		_resource_loader  = CE_NEW(_allocator, ResourceLoader)(*_bundle_filesystem);
		_resource_manager = CE_NEW(_allocator, ResourceManager)(*_resource_loader);
		_resource_manager->register_type(RESOURCE_TYPE_SCRIPT,           lur::load, lur::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_TEXTURE,          txr::load, txr::unload, txr::online, txr::offline);
		_resource_manager->register_type(RESOURCE_TYPE_MESH,             mhr::load, mhr::unload, mhr::online, mhr::offline);
		_resource_manager->register_type(RESOURCE_TYPE_SOUND,            sdr::load, sdr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_UNIT,             utr::load, utr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_SPRITE,           spr::load, spr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_PACKAGE,          pkr::load, pkr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_PHYSICS,          phr::load, phr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_MATERIAL,         mtr::load, mtr::unload, mtr::online, mtr::offline);
		_resource_manager->register_type(RESOURCE_TYPE_PHYSICS_CONFIG,   pcr::load, pcr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_FONT,             ftr::load, ftr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_LEVEL,            lvr::load, lvr::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_SHADER,           shr::load, shr::unload, shr::online, shr::offline);
		_resource_manager->register_type(RESOURCE_TYPE_SPRITE_ANIMATION, sar::load, sar::unload, NULL,        NULL        );
		_resource_manager->register_type(RESOURCE_TYPE_CONFIG,           cor::load, cor::unload, NULL,        NULL        );

		// Read config
		{
			TempAllocator512 ta;
			DynamicString boot_dir(ta);

			if (_device_options._boot_dir != NULL)
			{
				boot_dir += _device_options._boot_dir;
				boot_dir += '/';
			}
			boot_dir += CROWN_BOOT_CONFIG;

			const StringId64 config_name(boot_dir.c_str());
			_resource_manager->load(RESOURCE_TYPE_CONFIG, config_name);
			_resource_manager->flush();
			_boot_config.parse((const char*)_resource_manager->get(RESOURCE_TYPE_CONFIG, config_name));
			_resource_manager->unload(RESOURCE_TYPE_CONFIG, config_name);
		}

		// Init all remaining subsystems
		_bgfx_allocator = CE_NEW(_allocator, BgfxAllocator)(default_allocator());
		_bgfx_callback  = CE_NEW(_allocator, BgfxCallback)();

		_display = display::create(_allocator);
		_window = window::create(_allocator);
		_window->open(_device_options._window_x
			, _device_options._window_y
			, _boot_config.window_w
			, _boot_config.window_h
			, _device_options._parent_window
			);
		_window->set_title(_boot_config.window_title.c_str());
		_window->set_fullscreen(_boot_config.fullscreen);
		_window->bgfx_setup();

		bgfx::init(bgfx::RendererType::Count
			, BGFX_PCI_ID_NONE
			, 0
			, _bgfx_callback
			, _bgfx_allocator
			);

		_shader_manager   = CE_NEW(_allocator, ShaderManager)(default_allocator());
		_material_manager = CE_NEW(_allocator, MaterialManager)(default_allocator(), *_resource_manager);
		_input_manager    = CE_NEW(_allocator, InputManager)(default_allocator());
		_unit_manager     = CE_NEW(_allocator, UnitManager)(default_allocator());
		_lua_environment  = CE_NEW(_allocator, LuaEnvironment)();

		audio_globals::init();
		physics_globals::init(_allocator);

		ResourcePackage* boot_package = create_resource_package(_boot_config.boot_package_name);
		boot_package->load();
		boot_package->flush();

		_lua_environment->load_libs();
		_lua_environment->execute((LuaResource*)_resource_manager->get(RESOURCE_TYPE_SCRIPT, _boot_config.boot_script_name));
		_lua_environment->call_global("init", 0);

		logd("Engine initialized");

		s16 mouse_x = 0;
		s16 mouse_y = 0;
		s16 mouse_last_x = 0;
		s16 mouse_last_y = 0;

		s64 last_time = os::clocktime();
		s64 curr_time;

		while (!process_events(mouse_x, mouse_y, mouse_last_x, mouse_last_y, _boot_config.vsync) && !_quit)
		{
			curr_time = os::clocktime();
			const s64 time = curr_time - last_time;
			last_time = curr_time;
			const f64 freq = (f64)os::clockfrequency();
			_last_delta_time = f32(time * (1.0 / freq));
			_time_since_start += _last_delta_time;

			profiler_globals::clear();
			_console_server->update();

			RECORD_FLOAT("device.dt", _last_delta_time);
			RECORD_FLOAT("device.fps", 1.0f/_last_delta_time);

			if (!_paused)
			{
				_resource_manager->complete_requests();

				{
					const s64 t0 = os::clocktime();
					_lua_environment->call_global("update", 1, ARGUMENT_FLOAT, last_delta_time());
					const s64 t1 = os::clocktime();
					RECORD_FLOAT("lua.update", f32((t1 - t0)*(1.0 / freq)));
				}
				{
					const s64 t0 = os::clocktime();
					_lua_environment->call_global("render", 1, ARGUMENT_FLOAT, last_delta_time());
					const s64 t1 = os::clocktime();
					RECORD_FLOAT("lua.render", f32((t1 - t0)*(1.0 / freq)));
				}
			}

			_input_manager->update();

			const bgfx::Stats* stats = bgfx::getStats();
			RECORD_FLOAT("bgfx.gpu_time", f32(f64(stats->gpuTimeEnd - stats->gpuTimeBegin)*1000.0/stats->gpuTimerFreq));
			RECORD_FLOAT("bgfx.cpu_time", f32(f64(stats->cpuTimeEnd - stats->cpuTimeBegin)*1000.0/stats->cpuTimerFreq));

			bgfx::frame();
			profiler_globals::flush();

			_lua_environment->reset_temporaries();

			_frame_count++;
		}

		_lua_environment->call_global("shutdown", 0);

		boot_package->unload();
		destroy_resource_package(*boot_package);

		physics_globals::shutdown(_allocator);
		audio_globals::shutdown();

		CE_DELETE(_allocator, _lua_environment);
		CE_DELETE(_allocator, _unit_manager);
		CE_DELETE(_allocator, _input_manager);
		CE_DELETE(_allocator, _material_manager);
		CE_DELETE(_allocator, _shader_manager);
		CE_DELETE(_allocator, _resource_manager);
		CE_DELETE(_allocator, _resource_loader);

		bgfx::shutdown();
		_window->close();
		window::destroy(_allocator, *_window);
		display::destroy(_allocator, *_display);
		CE_DELETE(_allocator, _bgfx_callback);
		CE_DELETE(_allocator, _bgfx_allocator);

		if (_last_log)
			_bundle_filesystem->close(*_last_log);

		CE_DELETE(_allocator, _bundle_filesystem);

		profiler_globals::shutdown();
	}

	CE_DELETE(_allocator, _data_compiler);
	_console_server->shutdown();
	CE_DELETE(_allocator, _console_server);

	_allocator.clear();
}

void Device::quit()
{
	_quit = true;
}

void Device::pause()
{
	_paused = true;
	logi("Engine paused.");
}

void Device::unpause()
{
	_paused = false;
	logi("Engine unpaused.");
}

void Device::resolution(u16& width, u16& height)
{
	width = _width;
	height = _height;
}

u64 Device::frame_count() const
{
	return _frame_count;
}

f32 Device::last_delta_time() const
{
	return _last_delta_time;
}

f64 Device::time_since_start() const
{
	return _time_since_start;
}

void Device::render(World& world, CameraInstance camera)
{
	bgfx::setViewClear(0
		, BGFX_CLEAR_COLOR | BGFX_CLEAR_DEPTH
		, 0x353839ff
		, 1.0f
		, 0
		);

	bgfx::setViewRect(0, 0, 0, _width, _height);
	bgfx::setViewRect(1, 0, 0, _width, _height);
	bgfx::setViewRect(2, 0, 0, _width, _height);

	const Matrix4x4 view = world.camera_view_matrix(camera);
	const Matrix4x4 proj = world.camera_projection_matrix(camera);

	bgfx::setViewTransform(0, to_float_ptr(view), to_float_ptr(proj));
	bgfx::setViewTransform(1, to_float_ptr(view), to_float_ptr(proj));
	bgfx::setViewTransform(2, to_float_ptr(MATRIX4X4_IDENTITY), to_float_ptr(MATRIX4X4_IDENTITY));
	bgfx::setViewSeq(2, true);

	bgfx::touch(0);
	bgfx::touch(1);
	bgfx::touch(2);

	float aspect_ratio = (_boot_config.aspect_ratio == -1.0f
		? (float)_width/(float)_height
		: _boot_config.aspect_ratio
		);
	world.camera_set_aspect(camera, aspect_ratio);
	world.camera_set_viewport_metrics(camera, 0, 0, _width, _height);

	world.render(view, proj);
}

World* Device::create_world()
{
	World* w = CE_NEW(default_allocator(), World)(default_allocator()
		, *_resource_manager
		, *_shader_manager
		, *_material_manager
		, *_unit_manager
		, *_lua_environment
		);
	array::push_back(_worlds, w);
	return w;
}

void Device::destroy_world(World& w)
{
	for (u32 i = 0, n = array::size(_worlds); i < n; ++i)
	{
		if (&w == _worlds[i])
		{
			CE_DELETE(default_allocator(), &w);
			_worlds[i] = _worlds[n - 1];
			array::pop_back(_worlds);
			return;
		}
	}

	CE_FATAL("Bad world");
}

ResourcePackage* Device::create_resource_package(StringId64 id)
{
	return CE_NEW(default_allocator(), ResourcePackage)(id, *_resource_manager);
}

void Device::destroy_resource_package(ResourcePackage& rp)
{
	CE_DELETE(default_allocator(), &rp);
}

void Device::reload(StringId64 type, StringId64 name)
{
	_resource_manager->reload(type, name);
	const void* new_resource = _resource_manager->get(type, name);

	if (type == RESOURCE_TYPE_SCRIPT)
	{
		_lua_environment->execute((const LuaResource*)new_resource);
	}
}

static StringStream& sanitize(StringStream& ss, const char* msg)
{
	using namespace string_stream;
	const char* ch = msg;
	for (; *ch; ch++)
	{
		if (*ch == '"' || *ch == '\\')
			ss << "\\";
		ss << *ch;
	}

	return ss;
}

static const char* s_severity_map[] = { "info", "warning", "error", "debug" };
CE_STATIC_ASSERT(countof(s_severity_map) == LogSeverity::COUNT);

void Device::log(const char* msg, LogSeverity::Enum severity)
{
	if (_last_log)
	{
		_last_log->write(msg, strlen32(msg));
		_last_log->write("\n", 1);
		_last_log->flush();
	}

	if (_console_server)
	{
		TempAllocator4096 ta;
		StringStream json(ta);

		json << "{\"type\":\"message\",";
		json << "\"severity\":\"" << s_severity_map[severity] << "\",";
		json << "\"message\":\""; sanitize(json, msg) << "\"}";

		_console_server->send(string_stream::c_str(json));
	}
}

ConsoleServer* Device::console_server()
{
	return _console_server;
}

DataCompiler* Device::data_compiler()
{
	return _data_compiler;
}

ResourceManager* Device::resource_manager()
{
	return _resource_manager;
}

LuaEnvironment* Device::lua_environment()
{
	return _lua_environment;
}

InputManager* Device::input_manager()
{
	return _input_manager;
}

ShaderManager* Device::shader_manager()
{
	return _shader_manager;
}

MaterialManager* Device::material_manager()
{
	return _material_manager;
}

UnitManager* Device::unit_manager()
{
	return _unit_manager;
}

Display* Device::display()
{
	return _display;
}

Window* Device::window()
{
	return _window;
}

char _buffer[sizeof(Device)];
Device* _device = NULL;

void run(const DeviceOptions& opts)
{
	CE_ASSERT(_device == NULL, "Crown already initialized");
	_device = new (_buffer) Device(opts);
	_device->run();
	_device->~Device();
	_device = NULL;
}

Device* device()
{
	return crown::_device;
}

} // namespace crown