local timer_box = { type = "fixed", fixed = {{-0.5, -0.5, 0.4, 0.5, 0.5, 0.5}} }

minetest.register_node("smart_light:timer", {
    description = "Smart Light Zeitschaltuhr",
    tiles = {
        "smart_light_panel_sides.png", "smart_light_panel_sides.png",
        "smart_light_panel_sides.png", "smart_light_panel_sides.png",
        "smart_light_panel_sides.png", "smart_light_panel_front_timer.png"
    },
    drawtype = "nodebox", paramtype = "light", paramtype2 = "facedir",
    groups = {cracky = 2, oddly_breakable_by_hand = 1},
    node_box = timer_box,

    on_construct = function(pos)
        local meta = minetest.get_meta(pos)
        meta:set_string("infotext", "Zeitschaltuhr (nicht konfiguriert)")
    end,

    on_rightclick = function(pos, node, clicker)
        local meta = minetest.get_meta(pos)
        local area = meta:get_string("area_id")
        local name = clicker:get_player_name()

        if area == "" then
            minetest.chat_send_player(name, "Bitte zuerst Area mit dem Programmer zuweisen!")
            return
        end

        local fs = "size[11,9]label[0.5,0.2;Zeitschaltuhr: " .. area:upper() .. "]"
        local y, x, count, channels = 1.2, 0.5, 0, {}

        if smart_light.registry.areas[area] and smart_light.registry.areas[area].channels then
            for c_id, _ in pairs(smart_light.registry.areas[area].channels) do table.insert(channels, c_id) end
            table.sort(channels)
            for _, c_id in ipairs(channels) do
                local c_data = smart_light.registry.areas[area].channels[c_id]
                local t_status = (c_data.timer and c_data.timer.enabled) and "AN" or "AUS"
                -- WICHTIG: Neues Kürzel tmr_m:
                fs = fs .. "button["..x..","..y..";2.5,0.8;tmr_ch_"..c_id..";" .. c_id .. "\n(TIMER: "..t_status..")]"
                x, count = x + 2.6, count + 1
                if count % 4 == 0 then x, y = 0.5, y + 1 end
            end
        else
            fs = fs .. "label[0.5,2;Keine Kanäle in dieser Area gefunden.]"
        end
        minetest.show_formspec(name, "tmr_m:" .. minetest.pos_to_string(pos), fs)
    end,

    on_timer = function(pos, elapsed)
        local meta = minetest.get_meta(pos)
        local area_id = meta:get_string("area_id")
        if area_id == "" or not smart_light.registry.areas[area_id] then return true end

        local time = minetest.get_timeofday() * 24
        
        for c_id, c_data in pairs(smart_light.registry.areas[area_id].channels) do
            if c_data.timer and c_data.timer.enabled then
                local t = c_data.timer
                local should_be_on = false
                if t.start_h < t.end_h then
                    if time >= t.start_h and time < t.end_h then should_be_on = true end
                else
                    if time >= t.start_h or time < t.end_h then should_be_on = true end
                end

                local current_status = smart_light.get_status_text(area_id, c_id)
                if should_be_on and current_status == "AUS" then
                    smart_light.switch_channel(area_id, c_id, "on")
                elseif not should_be_on and current_status == "AN" then
                    local now = minetest.get_gametime()
                    if not c_data.ms_deadline or now >= c_data.ms_deadline then
                        smart_light.switch_channel(area_id, c_id, "off")
                    end
                end
            end
        end
        return true
    end,
})