Standup Timer

# @name    Standup Timer
# @desc    For practicing fixed-time standup comedy sets.
# @author  Matt Stein
# @version 1.0
# @desc    SELECT: tap to start/pause, double-tap to reset. Flashes for the
# @desc    last 5s before the countdown reaches the configured warning mark.
# @config  minutes   slider "Minutes"             default=5 min=1 max=15 unit=min
# @config  flash_min slider "Flash at (min left)" default=1 min=1 max=14 unit=min
# @config  icon_id   text   "Icon ID"             default="1010"

# 1-minute warning: five seconds of flashing that finishes right as the
# countdown crosses the threshold, so it reads as a lead-up rather than a
# reaction.
FLASH_ON_MS    = 500
FLASH_OFF_MS   = 500
FLASH_COUNT    = 5
FLASH_TOTAL_MS = FLASH_COUNT * (FLASH_ON_MS + FLASH_OFF_MS)

# Flip on to sanity-check the flash and 0:00 transitions without sitting
# through a full countdown: a run starts 15s before the flash window and the
# flash always ends 5s before 0:00, ignoring the minutes/flash_min config.
TEST_MODE           = false
TEST_PRE_FLASH_MS   = 15000
TEST_THRESHOLD_MS   = 5000

# 0:00 closing sequence: a short black beat, then the message blinks until
# the button starts a new run or resets.
DONE_DIP_MS    = 600
DONE_MSG_CHARS = ["F", "U", "C", "K", " ", "O", "F", "F", "!"]

class StandupTimer
  var state           # "stopped" | "running" | "paused" | "done"
  var start_ms
  var remaining_ms     # frozen remaining time while paused/stopped/done
  var warned           # flash warning already fired this run
  var flashing
  var flash_start_ms
  var last_press_ms
  var pending_toggle
  var done_start_ms    # when the countdown hit zero, for the 0:00 hold + blink sequence

  def init()
    self.state = "stopped"
    self.start_ms = 0
    self.remaining_ms = self.duration_ms()
    self.warned = false
    self.flashing = false
    self.last_press_ms = 0
    self.pending_toggle = false
    self.done_start_ms = 0
  end

  # Convenience variables — both configurable from the app's settings in the
  # AWTRIX UI, no code edits needed.
  def duration_ms()
    if TEST_MODE
      return TEST_PRE_FLASH_MS + FLASH_TOTAL_MS + TEST_THRESHOLD_MS
    end
    return store.get("minutes", 5) * 60000
  end

  def flash_threshold_ms()
    if TEST_MODE
      return TEST_THRESHOLD_MS
    end
    return store.get("flash_min", 1) * 60000
  end

  def on_button(btn)
    if btn != "select" return end
    var t = now_ms()
    if self.pending_toggle && (t - self.last_press_ms) < 400
      self.pending_toggle = false
      self.reset()
    else
      self.pending_toggle = true
      self.last_press_ms = t
    end
  end

  def reset()
    self.state = "stopped"
    self.remaining_ms = self.duration_ms()
    self.warned = false
    self.flashing = false
  end

  # A single tap after the countdown finishes jumps straight into a fresh run —
  # handy for back-to-back practice reps. Double-tap still resets to idle.
  def toggle()
    if self.state == "stopped" || self.state == "done"
      self.state = "running"
      self.remaining_ms = self.duration_ms()
      self.warned = false
      self.start_ms = now_ms()
    elif self.state == "running"
      self.remaining_ms = self.current_remaining()
      self.state = "paused"
    elif self.state == "paused"
      self.state = "running"
      self.start_ms = now_ms() - (self.duration_ms() - self.remaining_ms)
    end
  end

  def current_remaining()
    var r = self.duration_ms() - (now_ms() - self.start_ms)
    if r < 0
      r = 0
    end
    return r
  end

  # Draws chars edge-to-edge: measures each glyph, then spreads the leftover
  # width evenly across the gaps so the message spans the full panel width
  # instead of sitting centered with default spacing. The gap at the space
  # between words gets one extra pixel on top of that.
  def draw_fill_width(chars, y, color)
    var n = size(chars)
    if n == 0 return end
    var widths = []
    var total_w = 0
    var i = 0
    while i < n
      var cw = text_ink_width(chars[i])
      widths.push(cw)
      total_w += cw
      i += 1
    end
    var gaps = n - 1
    var extra = 0
    if gaps > 0
      extra = int((width() - total_w) / gaps)
      if extra < 0
        extra = 0
      end
    end
    var x = 0
    i = 0
    while i < n
      text(x, y, chars[i], color)
      x += widths[i] + extra
      if chars[i] == " "
        x += 1
      end
      i += 1
    end
  end

  def draw()
    if self.pending_toggle && (now_ms() - self.last_press_ms) >= 400
      self.pending_toggle = false
      self.toggle()
    end

    if self.state == "running"
      self.remaining_ms = self.current_remaining()
      # Cross into "done" (and red) the instant the displayed time would
      # read 0:00, not only once the underlying ms reaches exactly zero —
      # otherwise the last fractional second still shows green.
      if self.remaining_ms < 1000
        self.state = "done"
        self.remaining_ms = 0
        self.done_start_ms = now_ms()
      elif !self.warned && self.remaining_ms <= self.flash_threshold_ms() + FLASH_TOTAL_MS
        self.warned = true
        self.flashing = true
        self.flash_start_ms = now_ms()
      end
    end

    # Once the countdown's been sitting at 0:00 for 5s, drop the readout
    # entirely: dip to black briefly, then blink the closing message until
    # the button starts a new run or resets.
    if self.state == "done" && (now_ms() - self.done_start_ms) >= 5000
      clear()
      var t2 = now_ms() - self.done_start_ms - 5000
      if t2 < DONE_DIP_MS
        return
      end
      var phase = int((t2 - DONE_DIP_MS) / 750) % 2
      if phase == 0
        self.draw_fill_width(DONE_MSG_CHARS, 6, 0xFF0000)
      end
      return
    end

    clear()

    var mic = store.get("icon_id", "")
    if mic != ""
      icon(mic, 0, 0)
    end

    var total_s = int(self.remaining_ms / 1000)
    var m = int(total_s / 60)
    var s = total_s % 60
    var s_str = str(s)
    if s < 10
      s_str = "0" + s_str
    end
    var label = str(m) + ":" + s_str

    var color = 0xFFFFFF
    if self.state == "running"
      # Once the flash warning has fired, the numbers stay yellow for the
      # rest of the run — a held cue between the white flash and the red
      # 0:00 state, not just green until it suddenly goes red.
      if self.warned
        color = 0xFFFF00
      else
        color = 0x00FF00
      end
    elif self.state == "paused"
      color = 0x888888
    elif self.state == "done"
      color = 0xFF0000
    end

    # Right-justified: the readout's width varies (0:00 vs 14:59), so anchor
    # its right edge instead of its left.
    var label_w = text_ink_width(label)
    var label_x = width() - 1 - label_w

    if self.flashing
      var t = now_ms() - self.flash_start_ms
      if t >= FLASH_TOTAL_MS
        self.flashing = false
      else
        var cycle = t % (FLASH_ON_MS + FLASH_OFF_MS)
        if cycle < FLASH_ON_MS
          # Flash the whole panel — fine to blot out the icon — but the
          # digits still draw on top below, so they stay legible.
          rect_fill(0, 0, width(), height(), 0xFFFFFF)
        end
      end
    end

    text(label_x, 6, label, color)
  end
end

return StandupTimer()