#include "stdafx.h"

int hMLuaLangpack;

LIST<void> CMLua::HookRefs(1, HandleKeySortT);
LIST<void> CMLua::ServiceRefs(1, HandleKeySortT);

static int CompareScripts(const CMLuaScript* p1, const CMLuaScript* p2)
{
	return mir_strcmpi(p1->GetModuleName(), p2->GetModuleName());
}

CMLua::CMLua() : L(NULL), Scripts(10, CompareScripts)
{
	MUUID muidLast = MIID_LAST;
	hMLuaLangpack = GetPluginLangId(muidLast, 0);
}

CMLua::~CMLua()
{
	Unload();
}

void CMLua::SetPaths()
{
	wchar_t path[MAX_PATH];

	lua_getglobal(L, "package");

	FoldersGetCustomPathT(g_hCLibsFolder, path, _countof(path), VARSW(MIRLUA_PATHT));
	lua_pushfstring(L, "%s\\?.dll", ptrA(mir_utf8encodeW(path)));
	lua_setfield(L, -2, "cpath");

	FoldersGetCustomPathT(g_hScriptsFolder, path, _countof(path), VARSW(MIRLUA_PATHT));
	lua_pushfstring(L, "%s\\?.lua", ptrA(mir_utf8encodeW(path)));
	lua_setfield(L, -2, "path");

	lua_pop(L, 1);
}

void CMLua::Load()
{
	Log("Loading lua engine");
	L = luaL_newstate();
	Log("Loading std modules");
	luaL_openlibs(L);

	SetPaths();

	lua_register(L, "print", luaM_print);
	lua_register(L, "a", luaM_toansi);
	lua_register(L, "u", luaM_toucs2);
	lua_register(L, "topointer", luaM_topointer);

	lua_getglobal(L, "tonumber");
	lua_setglobal(L, "_tonumber");
	lua_register(L, "tonumber", luaM_tonumber);

	lua_pushstring(L, "");
	lua_getmetatable(L, -1);
	lua_pushstring(L, "__mod");
	lua_pushcfunction(L, luaM_interpolate);
	lua_rawset(L, -3);
	lua_pushstring(L, "__index");
	lua_rawget(L, -2);
	lua_pushcfunction(L, luaM_interpolate);
	lua_setfield(L, -2, "interpolate");
	lua_pop(L, 3);

	lua_atpanic(L, luaM_atpanic);

	Log("Loading miranda modules");
	CMLuaModuleLoader::Load(L);
	Log("Loading scripts");
	CMLuaScriptLoader::Load(L);
}

void CMLua::Unload()
{
	Log("Unloading lua engine");

	while (int last = Scripts.getCount())
	{
		CMLuaScript *script = g_mLua->Scripts[last - 1];
		Scripts.remove(script);
		script->Unload();
		delete script;
	}

	KillModuleIcons(hMLuaLangpack);
	KillModuleSounds(hMLuaLangpack);
	KillModuleMenus(hMLuaLangpack);
	KillModuleHotkeys(hMLuaLangpack);

	KillObjectEventHooks(L);
	KillObjectServices(L);

	lua_close(L);
}

void CMLua::KillLuaRefs()
{
	while (HookRefs.getCount())
	{
		HandleRefParam *param = (HandleRefParam*)HookRefs[0];
		if (param != NULL)
		{
			luaL_unref(param->L, LUA_REGISTRYINDEX, param->ref);
			HookRefs.remove(0);
			delete param;
		}
	}

	while (ServiceRefs.getCount())
	{
		HandleRefParam *param = (HandleRefParam*)ServiceRefs[0];
		if (param != NULL)
		{
			luaL_unref(param->L, LUA_REGISTRYINDEX, param->ref);
			ServiceRefs.remove(0);
			delete param;
		}
	}
}