#include <a_samp>

new keydown[MAX_PLAYERS] = {false, ...};
new rampid[MAX_PLAYERS] = {-1, ...};
forward Keys();
forward RemoveRamp(playerid);
forward Float:GetOptimumRampDistance(playerid);
forward Float:GetXYInFrontOfPlayer(playerid, &Float:x, &Float:y, Float:distance);

new ramptypes[] = {
    1503, // curvy normal one
    1660, // concrete one with pipes
    1245, // plank of wood against a box
    1631, // water ramp with rocks
    1632, // normal water ramp
    1655  // wide water ramp
//  16395 // desert jump
};

new playerramptypes[MAX_PLAYERS] = {0, ...};

public OnFilterScriptInit()
{
    SetTimer("Keys", 100, 1);
    return 1;
}

public Keys()
{
    new keys, updown, leftright, playerid;
    new Float:x, Float:y, Float:z, Float:angle;
    for (playerid = 0; playerid < MAX_PLAYERS; playerid++) {
        if (IsPlayerConnected(playerid)) {
            GetPlayerKeys(playerid, keys, updown, leftright);
            if (keys & KEY_CROUCH && IsPlayerInAnyVehicle(playerid)) {
                if (!keydown[playerid]) {
                    keydown[playerid] = true;
                    if (rampid[playerid] == -1) {
                        GetPlayerPos(playerid, x, y, z);
                        angle = GetXYInFrontOfPlayer(playerid, x, y, GetOptimumRampDistance(playerid));
                        switch (playerramptypes[playerid]) {
                            case 2:
                            {
                            angle -= 90.0;
                            if (angle < 0.0) angle += 360.0;
                            z += 0.5;
                            }
                            case 1:
                            {
                                z -= 0.5;
                            }
                        }
                        rampid[playerid] = CreateObject(ramptypes[playerramptypes[playerid]], x, y, z - 0.5, 0.0, 0.0, angle);
                        SetTimerEx("RemoveRamp", 2000, 0, "d", playerid);
                    }
                }
            } else keydown[playerid] = false;
        }
    }
}

public OnPlayerCommandText(playerid, cmdtext[])
{
    if (strcmp("/setramp ", cmdtext, true, 9) == 0)
    {
        new ramp = strval(cmdtext[9]);
        if (ramp < 0 || ramp >= sizeof(ramptypes)) {
            SendClientMessage(playerid, 0xFFFFFFAA, "Invalid ramp ID.");
        } else {
            playerramptypes[playerid] = ramp;
        }
        return 1;
    }
    return 0;
}

public RemoveRamp(playerid)
{
    if (rampid[playerid] != -1) {
        DestroyObject(rampid[playerid]);
        rampid[playerid] = -1;
    }
}

public OnFilterScriptExit()
{
    for (new i=0; i<MAX_PLAYERS; i++)
    {
        if (rampid[i] != -1) DestroyObject(rampid[i]);
    }
}

Float:GetOptimumRampDistance(playerid)
{
    new ping = GetPlayerPing(playerid), Float:dist;
    dist = floatpower(ping, 0.25);
    dist = dist*4.0;
    dist = dist+5.0;
    return dist;
}

Float:GetXYInFrontOfPlayer(playerid, &Float:x, &Float:y, Float:distance)
{
    new Float:a;
    GetPlayerPos(playerid, x, y, a);
    if (IsPlayerInAnyVehicle(playerid)) GetVehicleZAngle(GetPlayerVehicleID(playerid), a);
    else GetPlayerFacingAngle(playerid, a);
    x += (distance * floatsin(-a, degrees));
    y += (distance * floatcos(-a, degrees));
    return a;
}