local times = 2
local power = 80

local function CalcDoubleJump(ply, move)

    if ply:KeyPressed(IN_JUMP) then
        --print("key pressed")
        if ply:IsOnGround() then
            --print("on ground")
            ply.double_jump_stage = 0
        else
            --print("increasing")
            ply.double_jump_stage = (ply.double_jump_stage or 0) + 1

            if ply.double_jump_stage < times then
                ply.double_jump_boost = CurTime() + 0.5
                --print("boosting")
            else
                ply.double_jump_stage = 0
                --print("resetting")
            end
        end
    end

    if (ply.double_jump_boost or 0) > CurTime() then
        --print("DOUBLE")

        if SERVER then
            power = power * 1
        end

        ply:SetGroundEntity(NULL)
        move:SetVelocity(move:GetVelocity() + (vector_up * power))
        ply.double_jump_boost = false
    end

end

if SinglePlayer() then
    hook.Add("SetupMove", "jump", CalcDoubleJump)
else
    hook.Add("Move", "jump", CalcDoubleJump)
end