local dbg
if moddebug then dbg=moddebug.dbg("railcarts") else dbg={v1=function() end,v2=function() end,v3=function() end} end

minetest.register_craft({
    output = "railcarts:controlrail 12",
    recipe = {
        {"default:steel_ingot", "", "default:steel_ingot"},
        {"default:steel_ingot", "default:stick", "default:steel_ingot"},
        {"default:steel_ingot", "default:mese_crystal_fragment", "default:steel_ingot"},
    }
})

minetest.register_node("railcarts:controlrail", {
    description = "Control Rail",
    drawtype = "raillike",
    tiles = {"railcarts_pa_carts_rail_pwr.png",
    "railcarts_pa_carts_rail_curved_pwr.png",
    "railcarts_pa_carts_rail_t_junction_pwr.png",
    "railcarts_pa_carts_rail_crossing_pwr.png"},
    inventory_image = "railcarts_pa_carts_rail_pwr.png",
    wield_image = "railcarts_pa_carts_rail_pwr.png",
    paramtype = "light",
    is_ground_content = true,
    walkable = false,
    selection_box = {
        type = "fixed",
        fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
    },
    groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},

    mesecons = {
        effector = {
            action_on = function(pos, node)
                node.name = "railcarts:controlrail_off"
                minetest.swap_node(pos, node)
            end
        }
    },
    on_construct = function(pos)
        local meta = minetest.get_meta(pos)
        meta:set_string("formspec",
        "field[fn;Control;${infotext}]")
        meta:set_string("infotext", "speedup")
    end,
    on_receive_fields = function(pos, formname, fields, sender)
        if fields and fields.fn then
            dbg.v2("Control rail at "..postostr(pos).." set to "..fields.fn.." by "..(sender:get_player_name() or ""))
            local meta = minetest.get_meta(pos)
            meta:set_string("infotext", fields.fn)
        end
    end
})

minetest.register_node("railcarts:controlrail_off", {
    description = "Control Rail",
    drawtype = "raillike",
    tiles = {"railcarts_pa_carts_rail_brk.png",
    "railcarts_pa_carts_rail_curved_brk.png",
    "railcarts_pa_carts_rail_t_junction_brk.png",
    "railcarts_pa_carts_rail_crossing_brk.png"},
    drop = 'railcarts:controlrail 1',
    paramtype = "light",
    is_ground_content = true,
    walkable = false,
    selection_box = {
        type = "fixed",
        fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
    },
    groups = {bendy=2,snappy=1,dig_immediate=2,attached_node=1,rail=1,connect_to_raillike=1},

    mesecons = {
        effector = {
            action_off = function(pos, node)
                node.name = "railcarts:controlrail"
                minetest.swap_node(pos, node)
            end
        }
    },
    on_construct = controlrail_construct,
    on_receive_fields = controlrail_receive
})

function controlrail_construct(pos)
    local meta = minetest.get_meta(pos)
    meta:set_string("formspec",
    "field[fn;Control;${infotext}]")
    meta:set_string("infotext", "speedup")
end

function controlrail_receive(pos, formname, fields, sender)
    if fields and fields.fn then
        dbg.v2("Control rail at "..postostr(pos).." set to "..fields.fn.." by "..(sender:get_player_name() or ""))
        local meta = minetest.get_meta(pos)
        meta:set_string("infotext", fields.fn)
    end
end