-- 4. CONTROLLER (Das Panel)
minetest.register_node("smart_light:controller", {
    description = "Smart Light Controller Panel",
    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_normal.png"
    },
    drawtype = "nodebox", paramtype = "light", paramtype2 = "facedir",
    groups = {cracky = 2, oddly_breakable_by_hand = 1},
    node_box = { type = "fixed", fixed = {{-0.5, -0.5, 0.4, 0.5, 0.5, 0.5}} },
    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
            local fs = "size[5,3]field[0.8,1;4,1;area_id;Panel Area ID (z.B. Schule);]button_exit[1,2;3,1;set_area;Area festlegen]"
            minetest.show_formspec(name, "smart_light:setup_" .. minetest.pos_to_string(pos), fs)
            return
        end

        local fs = "size[11,9]label[0.5,0.2;Zentrale: " .. area:upper() .. "]" ..
                   "label[6,0.2;Global:]" ..
                   "button[7,0;1.2,0.6;all_off;OFF]button[8.5,0;1.2,0.6;all_on;ON]"

        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
                -- Status AN/AUS statt Anzahl
                local status = smart_light.get_status_text(area, c_id)
                fs = fs .. "button["..x..","..y..";2.5,0.8;chan_"..c_id..";" .. c_id .. " ("..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 Lichter für diese Area registriert.]"
        end
        minetest.show_formspec(name, "smart_light:main_" .. minetest.pos_to_string(pos), fs)
    end,

    after_dig_node = function(pos, oldnode, oldmetadata)
        local area = oldmetadata.fields.area_id
        if area and area ~= "" and smart_light.registry.areas[area] then
            if smart_light.registry.areas[area].channels then
                for c_id, c_data in pairs(smart_light.registry.areas[area].channels) do
                    -- 1. Lampen zurücksetzen
                    local nodes = c_data.nodes or {}
                    for p_str, _ in pairs(nodes) do
                        local l_pos = minetest.string_to_pos(p_str)
                        local l_node = minetest.get_node(l_pos)
                        if l_node.name ~= "ignore" then
                            local original = smart_light.shadow_to_original[l_node.name] or l_node.name
                            minetest.swap_node(l_pos, {name = original, param2 = l_node.param2})
                            local l_meta = minetest.get_meta(l_pos)
                            l_meta:set_string("sl_area", "")
                            l_meta:set_string("sl_chan", "")
                        end
                    end
                    -- 2. Schalter zurücksetzen
                    local switches = c_data.switches or {}
                    for s_str, _ in pairs(switches) do
                        local s_pos = minetest.string_to_pos(s_str)
                        minetest.swap_node(s_pos, {name = "smart_light:switch"})
                        local s_meta = minetest.get_meta(s_pos)
                        s_meta:set_string("sl_area", "")
                        s_meta:set_string("sl_chan", "")
                        s_meta:set_string("infotext", "")
                    end
                end
            end
            smart_light.registry.areas[area] = nil
            smart_light.save()
        end
    end,
})