//----------------------------------------------------------------------------------------------------
// Grenade announce: throwing a grenade makes the game itself emit "Fire in the hole!" via the
// RadioText usermessage (it is not a client command), so intercept it and re-send the line
// styled a frame later. The game's SendAudio (Radio.FireInTheHole) is likewise intercepted and
// re-emitted through EmitSoundToClient so each listener's radio volume preference applies.
//----------------------------------------------------------------------------------------------------

#define FIRE_IN_THE_HOLE_TOKEN "#Cstrike_TitlesTXT_Fire_in_the_hole"

void Grenade_Init()
{
	UserMsg RadioText = GetUserMessageId("RadioText");
	if (RadioText == INVALID_MESSAGE_ID)
		SetFailState("RadioText usermessage unavailable.");

	HookUserMessage(RadioText, Hook_RadioText, true);
	HookUserMessage(GetUserMessageId("SendAudio"), Hook_SendAudio, true);
}

public Action Hook_SendAudio(UserMsg msg_id, Handle bf, const int[] players, int playersNum, bool reliable, bool init)
{
	if (!g_cvEnabled.BoolValue)
		return Plugin_Continue;

	char sound[32];
	BfReadString(bf, sound, sizeof(sound), false);

	// Grenade announces are the only radio SendAudio the engine still emits (the command
	// listeners block the rest); round events (bomb/win jingles) pass through untouched.
	if (!StrEqual(sound, "Radio.FireInTheHole"))
		return Plugin_Continue;

	// Sounds cannot be emitted from inside a usermessage hook either, so re-emit next frame.
	DataPack pack = new DataPack();
	pack.WriteCell(playersNum);
	for (int i = 0; i < playersNum; i++)
	{
		int target = players[i];
		pack.WriteCell((target >= 1 && target <= MaxClients && IsClientInGame(target)) ? GetClientUserId(target) : 0);
	}
	RequestFrame(OnFireInTheHoleResend, pack);

	return Plugin_Handled;
}

public void OnFireInTheHoleResend(DataPack pack)
{
	pack.Reset();
	int num = pack.ReadCell();

	int[] players = new int[MaxClients];
	int playersNum = 0;
	for (int i = 0; i < num; i++)
	{
		int target = GetClientOfUserId(pack.ReadCell());
		if (target && !IsFakeClient(target))
			players[playersNum++] = target;
	}
	delete pack;

	Radio_EmitToPlayers(players, playersNum, SOUND_FIREINTHEHOLE);
}

public Action Hook_RadioText(UserMsg msg_id, Handle bf, const int[] players, int playersNum, bool reliable, bool init)
{
	if (!g_cvEnabled.BoolValue)
		return Plugin_Continue;

	BfReadByte(bf); // msg_dest
	int client = BfReadByte(bf);

	if (client < 1 || client > MaxClients || !IsClientInGame(client))
		return Plugin_Continue;

	// Layout: msg_name, then up to four params. "#Game_radio" carries the phrase token in
	// param2, "#Game_radio_location" in param3 (param2 is the nav place name).
	char msgName[64], param[64], token[64];
	BfReadString(bf, msgName, sizeof(msgName), false); // msg_name
	BfReadString(bf, param, sizeof(param), false);     // param1 = player name
	BfReadString(bf, token, sizeof(token), false);     // param2
	BfReadString(bf, param, sizeof(param), false);     // param3

	if (StrEqual(msgName, "#Game_radio_location"))
		strcopy(token, sizeof(token), param);
	else if (!StrEqual(msgName, "#Game_radio"))
		return Plugin_Continue;

	if (!StrEqual(token, FIRE_IN_THE_HOLE_TOKEN))
		return Plugin_Continue;

	if (Bans_IsBanned(client))
		return Plugin_Handled;

	// Usermessages cannot be sent from inside a usermessage hook, so stash the data and
	// recipients (as userids) and re-send next frame.
	DataPack pack = new DataPack();
	pack.WriteCell(GetClientUserId(client));
	pack.WriteCell(playersNum);
	for (int i = 0; i < playersNum; i++)
	{
		int target = players[i];
		pack.WriteCell((target >= 1 && target <= MaxClients && IsClientInGame(target)) ? GetClientUserId(target) : 0);
	}
	RequestFrame(OnGrenadeResend, pack);

	return Plugin_Handled;
}

public void OnGrenadeResend(DataPack pack)
{
	pack.Reset();
	int client = GetClientOfUserId(pack.ReadCell());
	int num = pack.ReadCell();

	int[] players = new int[MaxClients];
	int playersNum = 0;
	for (int i = 0; i < num; i++)
	{
		int target = GetClientOfUserId(pack.ReadCell());
		if (target && !IsFakeClient(target))
			players[playersNum++] = target;
	}
	delete pack;

	if (!client || !IsClientInGame(client) || !playersNum)
		return;

	char text[256];
	Format_RadioLine(client, Radio_IsLeader(client), "Fire in the hole!", text, sizeof(text));

	Radio_SendChat(client, players, playersNum, text);
}