local Gauss
local C4Distance = 0
local box = gui.Groupbox(gui.Reference('VISUALS', "OTHER", "Options"), "Lethal C4 Radius", 0, 280, 213, 320);
local check = gui.Checkbox(box, "check", "Active", false)
local slider_r = gui.Slider(box, "slider_r", "Red", 255, 0, 255);
local slider_g = gui.Slider(box, "slider_g", "Green", 255, 0, 255);
local slider_b = gui.Slider(box, "slider_b", "Blue", 255, 0, 255);
local slider_a = gui.Slider(box, "slider_a", "Alpha", 255, 0, 255);

function calc_dmg(Bomb, Player)
    Gauss = (C4Distance - 75.68) / 789.2
    local flDamage = 450.7 * math.exp(-Gauss * Gauss);

    if Player:GetProp("m_ArmorValue") > 0 then
        local flArmorRatio = 0.5;
        local flArmorBonus = 0.5;

        if Player:GetProp("m_ArmorValue") > 0 then
            local flNew = flDamage * flArmorRatio;
            local flArmor = (flDamage - flNew) * flArmorBonus;

            if flArmor > Player:GetProp("m_ArmorValue") then
                flArmor = Player:GetProp("m_ArmorValue") * (1 / flArmorBonus);
                flNew = flDamage - flArmor;
            end

            flDamage = flNew;
        end
    end

    return math.max(flDamage, 0);
end

local function drawCircle(x, y, z, radius, thickness, quality, r, g, b, a)
    local quality = quality or 20
    local thickness = thickness or 8
    local Screen_X_Line_Old, Screen_Y_Line_Old
    for rot = 0, 360, quality do
        local rot_temp = math.rad(rot)
        local LineX, LineY, LineZ = radius * math.cos(rot_temp) + x, radius * math.sin(rot_temp) + y, z
        local Screen_X_Line, Screen_Y_Line = client.WorldToScreen(LineX, LineY, LineZ)
        if Screen_X_Line ~= nil and Screen_X_Line_Old ~= nil then
            draw.SetFont(draw.CreateFont("Tahoma", 12));
            -- draw.Color(r, g, b, a)
            draw.Line(Screen_X_Line, Screen_Y_Line, Screen_X_Line_Old, Screen_Y_Line_Old)
            for i = 0, thickness do
                draw.Line(Screen_X_Line, Screen_Y_Line + i, Screen_X_Line_Old, Screen_Y_Line_Old + i)
            end
        end
        Screen_X_Line_Old, Screen_Y_Line_Old = Screen_X_Line, Screen_Y_Line
    end
end

callbacks.Register("Draw", function()

    if check:GetValue() then

        local local_player = entities.GetLocalPlayer();
        local bomb = entities.FindByClass("CPlantedC4")[1];

        if (bomb == nil or local_player == nil or not local_player:IsAlive()) then return end

        if not (bomb:GetProp("m_bBombTicking") and bomb:GetProp("m_bBombDefused") == 0 and globals.CurTime() < bomb:GetProp("m_flC4Blow")) then
            return
        end
        local bomb_origin_x, bomb_origin_y, bomb_origin_z = bomb:GetAbsOrigin()
        local player_origin_x, player_origin_y, player_origin_z = local_player:GetAbsOrigin()
        local damage
        local radius = 0

        repeat
            damage = calc_dmg(bomb, local_player)
            health_left = local_player:GetHealth() - damage
            if health_left < 0 then
                C4Distance = C4Distance + 1
            end

            if health_left > 0 then end
        until (C4Distance == 1500 or health_left > 0)

        radius = C4Distance
        -- 'cylinder'
        --for i=1,150,1 do
        --	drawCircle(bomb_origin_x, bomb_origin_y, player_origin_z+i, radius, 1, 40, 221, 33, 33, 100)
        --end

        -- thick circle
        draw.Color(slider_r:GetValue(), slider_g:GetValue(), slider_b:GetValue(), slider_a:GetValue());
        drawCircle(bomb_origin_x, bomb_origin_y, player_origin_z, radius, 10, 1, 221, 33, 33, 100)
    end
end)

client.AllowListener('bomb_exploded')
callbacks.Register('FireGameEvent', function(event)
    if (event:GetName() == "bomb_exploded") then
        C4Distance = 0
    end
end)