local lantern_box = {
    type = "fixed",
    fixed = {
        {
            -3/16, -0.5, -3/16,
            3/16, -1/16, 3/16,
        },
        {
            -2/16, -1/16, -2/16,
            2/16, 1/16, 2/16
        },
        {
            -1/16, 1/16, -1/16,
            1/16, 3/16, 1/16
        }
    }
}

local hanging_lantern_box = {
    type = "fixed",
    fixed = {
        {
            -3/16, -7/16, -3/16,
            3/16, 0, 3/16,
        },
        {
            -2/16, 0, -2/16,
            2/16, 2/16, 2/16
        },
        {
            -1/16, 1/16, -1/16,
            1/16, 0.5, 1/16
        }
    }
}

function rgt.register_lantern(type)
    local function on_place(s, p, pt)
        local out = ItemStack(s)
        local target = minetest.registered_nodes[minetest.get_node(pt.under).name].buildable_to and pt.under or pt.above
        local below = minetest.get_node(target:offset(0, -1, 0))
        
        -- TODO: Check solidity, not just air-ness.
        if below.name == "air" then
            local above = minetest.get_node(target:offset(0, 1, 0))
            
            if above.name == "air" then
                return s
            end
            
            s:set_name("lantern_"..type.."_hanging")
        else
            s:set_name("lantern_"..type)
        end

        local stack = minetest.item_place_node(s, p, pt)
        out:set_count(stack:get_count())
        
        return out
    end
    
    rgt.register_node("lantern_"..type, {
        drawtype = "mesh",
        mesh = "rgt_lantern.gltf",
        tiles = {"rgt_lantern_"..type..".png"},
        paramtype = "light",
        light_source = 11,
        selection_box = lantern_box,
        collision_box = lantern_box,
        node_placement_prediction = "",
        groups = {dig_immediate = 3},
        on_place = on_place
    })
    
    rgt.register_node("lantern_"..type.."_hanging", {
        drawtype = "mesh",
        mesh = "rgt_lantern_hanging.gltf",
        tiles = {"rgt_lantern_"..type..".png"},
        paramtype = "light",
        light_source = 11,
        selection_box = hanging_lantern_box,
        collision_box = hanging_lantern_box,
        node_placement_prediction = "",
        drop = "lantern_"..type,
        groups = {dig_immediate = 3},
        on_place = on_place
    })
end

rgt.register_lantern("iron")
rgt.register_lantern("copper")