Ergonomic Break Reminder with Input Lock

-- rebind: min_sdk=0.1.0
-- rebind: name=Ergonomic Break Reminder
-- rebind: description=Enforced periodic breaks with input lock and guided stretches

local cfg = UI.Schema({
    enabled = UI.Toggle(true, { label = "Enable Break Reminders" }),
    interval = UI.Slider(30, {
        min = 5,
        max = 120,
        suffix = " min",
        label = "Break Interval",
        group = "Timing",
    }),
    duration = UI.Slider(5, {
        min = 1,
        max = 15,
        suffix = " min",
        label = "Break Duration",
        group = "Timing",
    }),
    lock_input = UI.Toggle(true, { label = "Lock Input During Break", group = "Behavior" }),
    show_timer = UI.Toggle(true, { label = "Show Countdown", group = "Display" }),
    skip_key = UI.Keybind("F12", { label = "Skip/Resume Key", group = "Hotkeys" }),
    pause_key = UI.Keybind("F11", { label = "Pause Reminders", group = "Hotkeys" }),
})

local lastBreakTime = System.Time()
local breakActive = false
local breakPaused = false
local breakCountdown = 0
local blockInput = false

local function formatTime(ms)
    local seconds = math.floor(ms / 1000)
    local mins = math.floor(seconds / 60)
    local secs = seconds % 60
    return string.format("%d:%02d", mins, secs)
end

function OnStart()
    lastBreakTime = System.Time()
    Log.Info("Break reminder active. Press " .. cfg.pause_key .. " to pause, " .. cfg.skip_key .. " to skip.")
end

function OnTick(delta)
    if not cfg.enabled or breakPaused then
        return
    end

    local now = System.Time()
    local timeSinceBreak = now - lastBreakTime

    -- Check if it's time for a break
    if not breakActive and timeSinceBreak >= cfg.interval * 60 * 1000 then
        breakActive = true
        breakCountdown = cfg.duration * 60 * 1000
        UI.Notify("Time for a break! " .. cfg.duration .. " minutes.", "warning")
        Audio.Play("break_start.wav", { volume = 0.7 })
    end

    -- Update break countdown
    if breakActive then
        breakCountdown = breakCountdown - delta
        if cfg.show_timer then
            UI.Notify("Break time: " .. formatTime(breakCountdown), "info")
        end

        if breakCountdown <= 0 then
            breakActive = false
            lastBreakTime = now
            UI.Notify("Break over! Back to work.", "success")
        end
    end
end

function OnDown(key)
    -- Pause/resume
    if key == cfg.pause_key then
        breakPaused = not breakPaused
        UI.Notify(breakPaused and "Reminders paused" or "Reminders resumed", "info")
        return false
    end

    -- Skip break
    if key == cfg.skip_key then
        if breakActive then
            breakActive = false
            lastBreakTime = System.Time()
            UI.Notify("Break skipped", "info")
            return false
        else
            breakPaused = false
            lastBreakTime = System.Time()
            UI.Notify("Timer reset", "info")
            return false
        end
    end

    -- Lock input during break if enabled
    if breakActive and cfg.lock_input then
        blockInput = true
        return false
    end

    return not blockInput
end

function OnUp(key)
    if breakActive and cfg.lock_input then
        return false
    end
    return true
end

function OnScroll(delta)
    if breakActive and cfg.lock_input then
        return false
    end
    return true
end

function OnMove(dx, dy)
    if breakActive and cfg.lock_input then
        return false
    end
    return true
end

function OnBlur()
    if breakActive and blockInput then
        blockInput = false
    end
end

function OnStop()
    blockInput = false
end