#include <a_players>
#include <a_samp>

new InAir[MAX_PLAYERS];
new CheckIfLanded[MAX_PLAYERS];
new AlreadyDoubleHopped[MAX_PLAYERS];
new ZWasZeroAtLastCheck[MAX_PLAYERS];


public OnPlayerConnect(playerid)
{
	InAir[playerid] = 0;
	return 1;
}

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
	if(newkeys == 32)
	{
	    if(!IsPlayerInAnyVehicle(playerid))
	    {
	        new Float:x,Float:y,Float:z;
			GetPlayerVelocity(playerid,x,y,z);
	        if(InAir[playerid] == 0 && z == 0)
	        {
				CheckIfLanded[playerid] = 1;
				InAir[playerid] = 1;
				AlreadyDoubleHopped[playerid] = 0;
				}
			else
			{
			    if(AlreadyDoubleHopped[playerid] == 1) return 1;
			    if(z <= 0)
			    {
			        SetPlayerVelocity(playerid,x,y,4);
			        AlreadyDoubleHopped[playerid] = 1;
					}
				else
				{
				    SetPlayerVelocity(playerid,x,y,z+4);
				    AlreadyDoubleHopped[playerid] = 1;
				    }
				}
			}
		}
	return 1;
}

public OnPlayerUpdate(playerid)
{
	if(CheckIfLanded[playerid] == 1)
	{
		if(!IsPlayerInAnyVehicle(playerid))
		{
		    new Float:x,Float:y,Float:z;
		    GetPlayerVelocity(playerid,x,y,z);
		    if(z == 0)
		    {
		        if(ZWasZeroAtLastCheck[playerid] == 1)
		        {
		            ZWasZeroAtLastCheck[playerid] = 0;
		            InAir[playerid] = 0;
		            return 1;
		            }
		        ZWasZeroAtLastCheck[playerid] = 1;
		        if(x > 0 || x < 0 || y > 0 || y < 0)
		        {
		            return 1;
		            }
				else
				{
				    InAir[playerid] = 0;
				    AlreadyDoubleHopped[playerid] = 0;
				    }
				}
			}
		}
	return 1;
}