local font = "electronic_highway_sign"
local fontSize = vec2(42, 58)
local textColor = rgbm(1, 1, 1, 1)

local bestTime = 0
local bestTimeSet = false
local isRace = false
local raceStartTime = -1.0 

local function formatBestTime(ms)
  if ms > 0 then
    local minutes = math.floor(ms / 60000)
    local seconds = math.floor((ms / 1000) % 60)
    local millis = math.floor(ms % 1000)
    return string.format("%d:%02d.%03d", minutes, seconds, millis)
  else
    return "--.---"
  end
end

local function formatRaceTime(seconds)
  local total = math.floor(seconds)
  local h = math.floor(total / 3600)
  local m = math.floor((total % 3600) / 60)
  local s = total % 60
  return string.format("%d:%02d:%02d", h, m, s)
end

function update(dt)
  local sim = ac.getSim()
  isRace = sim.raceSessionType == 3 and sim.isSessionStarted

  local timeText = ""

  if isRace then
    if raceStartTime == -1.0 then
      raceStartTime = sim.currentSessionTime / 1000
    end
    local elapsedTime = sim.currentSessionTime / 1000 - raceStartTime
    timeText = formatRaceTime(elapsedTime)
  else
    raceStartTime = -1.0

    local leader = ac.getCar.leaderboard(0)
    if leader and leader.bestLapTimeMs > 0 then
      bestTime = leader.bestLapTimeMs
      bestTimeSet = true
    end

    timeText = formatBestTime(bestTimeSet and bestTime or 0)
  end

  display.text{
    pos = vec2(10, 4),
    letter = fontSize,
    text = timeText,
    font = font,
    spacing = -9,
    color = textColor
  }
end