//(c) Macluawn

forward OnPlayerEnterCheckPointEx(playerid, checkpoint);
forward mcpCheck();

enum mcpParamsEx
{
    bool:mcpCreated,
    Float:mcpX,
    Float:mcpY,
    Float:mcpZ,
};

new mcpParams[30][mcpParamsEx],
    mcpId = -1,
    mcpUsed,
    bool:mcpShown[MAX_PLAYERS][30],
    bool:mcpEntered[MAX_PLAYERS][30];

stock CreateCheckpoint(Float:x, Float:y, Float:z)
{
    mcpId = -1;
    for (new mcpi = 0; mcpi < 30; mcpi++)
    {
        if(mcpParams[mcpi][mcpX] == 0)
        {
            mcpId = mcpi;
            break;
        }
    }
    if(mcpId == -1) return -1;
    mcpParams[mcpId][mcpCreated] = true;
    mcpParams[mcpId][mcpX] = x;
    mcpParams[mcpId][mcpY] = y;
    mcpParams[mcpId][mcpZ] = z;
    if(mcpUsed == 0)
    {
        SetTimer("mcpCheck",150,true);
        mcpUsed = 1;
    }
    return mcpId;
}

stock ShowPlayerCheckpoint(playerid, mcpid, bool:visable = true)
{
    if(0 > mcpid > 29) return 0;
    if(mcpParams[mcpId][mcpCreated] == false) return 0;
    if(visable == true) SetPlayerMapIcon(playerid, mcpid, mcpParams[mcpid][mcpX], mcpParams[mcpid][mcpY], mcpParams[mcpid][mcpZ], 0, 0xff0000AA, MAPICON_GLOBAL_CHECKPOINT);
    else SetPlayerMapIcon(playerid, mcpid, mcpParams[mcpid][mcpX], mcpParams[mcpid][mcpY], mcpParams[mcpid][mcpZ], 0, 0xff000000, MAPICON_GLOBAL_CHECKPOINT);
    mcpShown[playerid][mcpid] = true;
    return 1;
}

stock HidePlayerCheckpoint(playerid, mcpid)
{
    if(0 > mcpid > 29) return 0;
    if(mcpShown[playerid][mcpid] == false) return 0;
    if(mcpParams[mcpId][mcpCreated] == 0) return 0;
    RemovePlayerMapIcon(playerid, mcpid);
    mcpShown[playerid][mcpid] = false;
    return 1;
}

stock RemoveCheckpoint(mcpid)
{
    if(0 > mcpid > 29) return 0;
    if(mcpParams[mcpid][mcpCreated] == 0) return 0;
    for (new mcpSlots = GetMaxPlayers(), mcpi; mcpi < mcpSlots; mcpi++)
    {
        if(!IsPlayerConnected(mcpi)) continue;
        mcpShown[mcpi][mcpid] = false;
        RemovePlayerMapIcon(mcpi, mcpid);
    }
    mcpParams[mcpid][mcpCreated] = 0;
    return 1;
}

stock IsCreated(mcpid)
{
    if(0 > mcpid > 29) return 0;
    if(mcpParams[mcpy][mcpCreated] == true) return 1;
    return 0;
}

public mcpCheck() //mcpi = Players  || mcpy = checkpoints
{
    for (new mcpSlots = GetMaxPlayers(), mcpi; mcpi < mcpSlots; mcpi++)
    {
        if(!IsPlayerConnected(mcpi)) continue;
        for (new mcpy = 0; mcpy < 30; mcpy++)
        {
            if(mcpShown[mcpi][mcpy] == false) continue;
            if(mcpParams[mcpy][mcpCreated] == false) continue;
            if(IsPlayerInRangeOfPoint(mcpi, 1.0, mcpParams[mcpy][mcpX], mcpParams[mcpy][mcpY], mcpParams[mcpy][mcpZ]) && mcpEntered[mcpi][mcpy] == false)
            {
                mcpEntered[mcpi][mcpy] = true;
                CallLocalFunction("OnPlayerEnterCheckPointEx", "ii", mcpi, mcpy);
                continue;
            }
            else if(!IsPlayerInRangeOfPoint(mcpi, 1.0, mcpParams[mcpy][mcpX], mcpParams[mcpy][mcpY], mcpParams[mcpy][mcpZ]) && mcpEntered[mcpi][mcpy] == true) mcpEntered[mcpi][mcpy] = false;
        }
    }
}