/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

/*
 * This code is based on Broken Sword 2.5 engine
 *
 * Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
 *
 * Licensed under GNU GPL v2
 *
 */

// -----------------------------------------------------------------------------
// Includes
// -----------------------------------------------------------------------------

#include "sword25/kernel/common.h"
#include "sword25/kernel/kernel.h"
#include "sword25/kernel/filesystemutil.h"
#include "sword25/kernel/window.h"
#include "sword25/kernel/resmanager.h"
#include "sword25/kernel/persistenceservice.h"
#include "sword25/script/script.h"
#include "sword25/script/luabindhelper.h"

namespace Sword25 {

// -----------------------------------------------------------------------------

static int DisconnectService(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushboolean(L, pKernel->DisconnectService(luaL_checkstring(L, 1)));

	return 1;
}

// -----------------------------------------------------------------------------

static int GetActiveServiceIdentifier(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushstring(L, pKernel->GetActiveServiceIdentifier(luaL_checkstring(L, 1)).c_str());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetSuperclassCount(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushnumber(L, pKernel->GetSuperclassCount());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetSuperclassIdentifier(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushstring(L, pKernel->GetSuperclassIdentifier(
	                   static_cast<uint>(luaL_checknumber(L, 1))).c_str());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetServiceCount(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushnumber(L, pKernel->GetServiceCount(luaL_checkstring(L, 1)));

	return 1;
}

// -----------------------------------------------------------------------------

static int GetServiceIdentifier(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushstring(L, pKernel->GetServiceIdentifier(luaL_checkstring(L, 1),
	               static_cast<uint>(luaL_checknumber(L, 2))).c_str());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetMilliTicks(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushnumber(L, pKernel->GetMilliTicks());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetTimer(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushnumber(L, static_cast<lua_Number>(pKernel->GetMicroTicks()) / 1000000.0);

	return 1;
}

// -----------------------------------------------------------------------------

static int StartService(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);

	lua_pushbooleancpp(L, pKernel->NewService(luaL_checkstring(L, 1), luaL_checkstring(L, 2)) != NULL);

	return 1;
}

// -----------------------------------------------------------------------------

static int Sleep(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	pKernel->Sleep(static_cast<uint>(luaL_checknumber(L, 1) * 1000));
	return 0;
}

// -----------------------------------------------------------------------------

static int Crash(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	pKernel->Crash();
	return 0;
}

// -----------------------------------------------------------------------------

static int ExecuteFile(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ScriptEngine *pSE = static_cast<ScriptEngine *>(pKernel->GetService("script"));
	BS_ASSERT(pSE);

	lua_pushbooleancpp(L, pSE->ExecuteFile(luaL_checkstring(L, 1)));

	return 0;
}

// -----------------------------------------------------------------------------

static int GetUserdataDirectory(lua_State *L) {
	lua_pushstring(L, FileSystemUtil::GetInstance().GetUserdataDirectory().c_str());
	return 1;
}

// -----------------------------------------------------------------------------

static int GetPathSeparator(lua_State *L) {
	lua_pushstring(L, FileSystemUtil::GetInstance().GetPathSeparator().c_str());
	return 1;
}

// -----------------------------------------------------------------------------

static int FileExists(lua_State *L) {
	lua_pushbooleancpp(L, FileSystemUtil::GetInstance().FileExists(luaL_checkstring(L, 1)));
	return 1;
}

// -----------------------------------------------------------------------------

static int CreateDirectory(lua_State *L) {
	lua_pushbooleancpp(L, FileSystemUtil::GetInstance().CreateDirectory(luaL_checkstring(L, 1)));
	return 1;
}

// -----------------------------------------------------------------------------

static int GetWinCode(lua_State *L) {
	lua_pushstring(L, "ScummVM");
	return 1;
}

// -----------------------------------------------------------------------------

static int GetSubversionRevision(lua_State *L) {
	// ScummVM is 1337
	lua_pushnumber(L, 1337);
	return 1;
}

// -----------------------------------------------------------------------------

static int GetUsedMemory(lua_State *L) {
	lua_pushnumber(L, Kernel::GetInstance()->GetUsedMemory());
	return 1;
}

// -----------------------------------------------------------------------------

static const char *KERNEL_LIBRARY_NAME = "Kernel";

static const luaL_reg KERNEL_FUNCTIONS[] = {
	{"DisconnectService", DisconnectService},
	{"GetActiveServiceIdentifier", GetActiveServiceIdentifier},
	{"GetSuperclassCount", GetSuperclassCount},
	{"GetSuperclassIdentifier", GetSuperclassIdentifier},
	{"GetServiceCount", GetServiceCount},
	{"GetServiceIdentifier", GetServiceIdentifier},
	{"GetMilliTicks", GetMilliTicks},
	{"GetTimer", GetTimer},
	{"StartService", StartService},
	{"Sleep", Sleep},
	{"Crash", Crash},
	{"ExecuteFile", ExecuteFile},
	{"GetUserdataDirectory", GetUserdataDirectory},
	{"GetPathSeparator", GetPathSeparator},
	{"FileExists", FileExists},
	{"CreateDirectory", CreateDirectory},
	{"GetWinCode", GetWinCode},
	{"GetSubversionRevision", GetSubversionRevision},
	{"GetUsedMemory", GetUsedMemory},
	{0, 0}
};

// -----------------------------------------------------------------------------

static int IsVisible(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushbooleancpp(L, pWindow->IsVisible());

	return 1;
}

// -----------------------------------------------------------------------------

static int SetVisible(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	pWindow->SetVisible(lua_tobooleancpp(L, 1));

	return 0;
}

// -----------------------------------------------------------------------------

static int GetX(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushnumber(L, pWindow->GetX());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetY(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushnumber(L, pWindow->GetY());

	return 1;
}

// -----------------------------------------------------------------------------

static int SetX(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	pWindow->SetX(static_cast<int>(luaL_checknumber(L, 1)));

	return 0;
}

// -----------------------------------------------------------------------------

static int SetY(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	pWindow->SetY(static_cast<int>(luaL_checknumber(L, 1)));

	return 0;
}

// -----------------------------------------------------------------------------

static int GetClientX(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushnumber(L, pWindow->GetClientX());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetClientY(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushnumber(L, pWindow->GetClientY());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetWidth(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushnumber(L, pWindow->GetWidth());

	return 1;
}

// -----------------------------------------------------------------------------

static int GetHeight(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushnumber(L, pWindow->GetHeight());

	return 1;
}

// -----------------------------------------------------------------------------

static int SetWidth(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	pWindow->SetWidth(static_cast<int>(luaL_checknumber(L, 1)));

	return 0;
}

// -----------------------------------------------------------------------------

static int SetHeight(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	pWindow->SetHeight(static_cast<int>(luaL_checknumber(L, 1)));

	return 0;
}

// -----------------------------------------------------------------------------

static int GetTitle(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushstring(L, pWindow->GetTitle().c_str());

	return 1;
}

// -----------------------------------------------------------------------------

static int SetTitle(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	pWindow->SetTitle(luaL_checkstring(L, 1));

	return 0;
}

// -----------------------------------------------------------------------------

static int ProcessMessages(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushbooleancpp(L, pWindow->ProcessMessages());

	return 1;
}

// -----------------------------------------------------------------------------

static int CloseWanted(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushbooleancpp(L, pWindow->CloseWanted());

	return 1;
}

// -----------------------------------------------------------------------------

static int WaitForFocus(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushbooleancpp(L, pWindow->WaitForFocus());

	return 1;
}

// -----------------------------------------------------------------------------

static int HasFocus(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	Window *pWindow = pKernel->GetWindow();
	BS_ASSERT(pWindow);

	lua_pushbooleancpp(L, pWindow->HasFocus());

	return 1;
}

// -----------------------------------------------------------------------------

static const char *WINDOW_LIBRARY_NAME = "Window";

static const luaL_reg WINDOW_FUNCTIONS[] = {
	{"IsVisible", IsVisible},
	{"SetVisible", SetVisible},
	{"GetX", GetX},
	{"SetX", SetX},
	{"GetY", GetY},
	{"SetY", SetY},
	{"GetClientX", GetClientX},
	{"GetClientY", GetClientY},
	{"GetWidth", GetWidth},
	{"GetHeight", GetHeight},
	{"SetWidth", SetWidth},
	{"SetHeight", SetHeight},
	{"GetTitle", GetTitle},
	{"SetTitle", SetTitle},
	{"ProcessMessages", ProcessMessages},
	{"CloseWanted", CloseWanted},
	{"WaitForFocus", WaitForFocus},
	{"HasFocus", HasFocus},
	{0, 0}
};

// -----------------------------------------------------------------------------

static int PrecacheResource(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	lua_pushbooleancpp(L, pResource->PrecacheResource(luaL_checkstring(L, 1)));

	return 1;
}

// -----------------------------------------------------------------------------

static int ForcePrecacheResource(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	lua_pushbooleancpp(L, pResource->PrecacheResource(luaL_checkstring(L, 1), true));

	return 1;
}

// -----------------------------------------------------------------------------

static int GetMaxMemoryUsage(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	lua_pushnumber(L, pResource->GetMaxMemoryUsage());

	return 1;
}

// -----------------------------------------------------------------------------

static int SetMaxMemoryUsage(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	pResource->SetMaxMemoryUsage(static_cast<uint>(lua_tonumber(L, 1)));

	return 0;
}

// -----------------------------------------------------------------------------

static int EmptyCache(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	pResource->EmptyCache();

	return 0;
}

// -----------------------------------------------------------------------------

static int IsLogCacheMiss(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	lua_pushbooleancpp(L, pResource->IsLogCacheMiss());

	return 1;
}

// -----------------------------------------------------------------------------

static int SetLogCacheMiss(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	pResource->SetLogCacheMiss(lua_tobooleancpp(L, 1));

	return 0;
}

// -----------------------------------------------------------------------------

static int DumpLockedResources(lua_State *L) {
	Kernel *pKernel = Kernel::GetInstance();
	BS_ASSERT(pKernel);
	ResourceManager *pResource = pKernel->GetResourceManager();
	BS_ASSERT(pResource);

	pResource->DumpLockedResources();

	return 0;
}

// -----------------------------------------------------------------------------

static const char *RESOURCE_LIBRARY_NAME = "Resource";

static const luaL_reg RESOURCE_FUNCTIONS[] = {
	{"PrecacheResource", PrecacheResource},
	{"ForcePrecacheResource", ForcePrecacheResource},
	{"GetMaxMemoryUsage", GetMaxMemoryUsage},
	{"SetMaxMemoryUsage", SetMaxMemoryUsage},
	{"EmptyCache", EmptyCache},
	{"IsLogCacheMiss", IsLogCacheMiss},
	{"SetLogCacheMiss", SetLogCacheMiss},
	{"DumpLockedResources", DumpLockedResources},
	{0, 0}
};

// -----------------------------------------------------------------------------

static int ReloadSlots(lua_State *L) {
	PersistenceService::GetInstance().ReloadSlots();
	lua_pushnil(L);
	return 1;
}

// -----------------------------------------------------------------------------

static int GetSlotCount(lua_State *L) {
	lua_pushnumber(L, PersistenceService::GetInstance().GetSlotCount());
	return 1;
}

// -----------------------------------------------------------------------------

static int IsSlotOccupied(lua_State *L) {
	lua_pushbooleancpp(L, PersistenceService::GetInstance().IsSlotOccupied(
	                       static_cast<uint>(luaL_checknumber(L, 1)) - 1));
	return 1;
}

// -----------------------------------------------------------------------------

static int GetSavegameDirectory(lua_State *L) {
	lua_pushstring(L, PersistenceService::GetInstance().GetSavegameDirectory().c_str());
	return 1;
}

// -----------------------------------------------------------------------------

static int IsSavegameCompatible(lua_State *L) {
	lua_pushbooleancpp(L, PersistenceService::GetInstance().IsSavegameCompatible(
	                       static_cast<uint>(luaL_checknumber(L, 1)) - 1));
	return 1;
}

// -----------------------------------------------------------------------------

static int GetSavegameDescription(lua_State *L) {
	lua_pushstring(L, PersistenceService::GetInstance().GetSavegameDescription(
	                   static_cast<uint>(luaL_checknumber(L, 1)) - 1).c_str());
	return 1;
}

// -----------------------------------------------------------------------------

static int GetSavegameFilename(lua_State *L) {
	lua_pushstring(L, PersistenceService::GetInstance().GetSavegameFilename(static_cast<uint>(luaL_checknumber(L, 1)) - 1).c_str());
	return 1;
}

// -----------------------------------------------------------------------------

static int LoadGame(lua_State *L) {
	lua_pushbooleancpp(L, PersistenceService::GetInstance().LoadGame(static_cast<uint>(luaL_checknumber(L, 1)) - 1));
	return 1;
}

// -----------------------------------------------------------------------------

static int SaveGame(lua_State *L) {
	lua_pushbooleancpp(L, PersistenceService::GetInstance().SaveGame(static_cast<uint>(luaL_checknumber(L, 1)) - 1, luaL_checkstring(L, 2)));
	return 1;
}

// -----------------------------------------------------------------------------

static const char *PERSISTENCE_LIBRARY_NAME = "Persistence";

static const luaL_reg PERSISTENCE_FUNCTIONS[] = {
	{"ReloadSlots", ReloadSlots},
	{"GetSlotCount", GetSlotCount},
	{"IsSlotOccupied", IsSlotOccupied},
	{"GetSavegameDirectory", GetSavegameDirectory},
	{"IsSavegameCompatible", IsSavegameCompatible},
	{"GetSavegameDescription", GetSavegameDescription},
	{"GetSavegameFilename", GetSavegameFilename},
	{"LoadGame", LoadGame},
	{"SaveGame", SaveGame},
	{0, 0}
};

// -----------------------------------------------------------------------------

bool Kernel::_RegisterScriptBindings() {
	ScriptEngine *pScript = static_cast<ScriptEngine *>(GetService("script"));
	BS_ASSERT(pScript);
	lua_State *L = static_cast<lua_State *>(pScript->GetScriptObject());
	BS_ASSERT(L);

	if (!LuaBindhelper::AddFunctionsToLib(L, KERNEL_LIBRARY_NAME, KERNEL_FUNCTIONS)) return false;
	if (!LuaBindhelper::AddFunctionsToLib(L, WINDOW_LIBRARY_NAME, WINDOW_FUNCTIONS)) return false;
	if (!LuaBindhelper::AddFunctionsToLib(L, RESOURCE_LIBRARY_NAME, RESOURCE_FUNCTIONS)) return false;
	if (!LuaBindhelper::AddFunctionsToLib(L, PERSISTENCE_LIBRARY_NAME, PERSISTENCE_FUNCTIONS)) return false;

	return true;
}

} // End of namespace Sword25