compost = {}
compost.items = {}
compost.groups = {}

function compost.register_item(name)
    compost.items[name] = true
end

function compost.register_group(name)
    compost.groups[name] = true
end

function compost.can_compost(name)
    if compost.items[name] then
        return true
    else
        for k, i in pairs(minetest.registered_items[name].groups) do
            if i > 0 then
                if compost.groups[tostring(k)] then
                    return true
                end
            end
        end

        return false
    end
end

-- grass
compost.register_item("default:grass_1")
compost.register_item("default:junglegrass")

-- leaves
compost.register_group("leaves")

-- dirt
compost.register_item("default:dirt")
compost.register_item("default:dirt_with_grass")

-- stick
compost.register_item("default:stick")

-- flowers
compost.register_item("flowers:geranium")
compost.register_item("flowers:tulip")
compost.register_item("flowers:rose")
compost.register_item("flowers:dandelion_yellow")
compost.register_item("flowers:dandelion_white")

-- food
compost.register_item("farming:bread")
compost.register_item("farming:wheat")

-- groups
compost.register_group("plant")
compost.register_group("flower")

minetest.register_node("compost:wood_barrel", {
    description = "Wood Barrel",
    tiles = {"default_wood.png"},
    drawtype = "nodebox",
    node_box = {
        type = "fixed",
        fixed = {{-1/2, -1/2, -1/2, 1/2, -3/8, 1/2},
            {-1/2, -1/2, -1/2, -3/8, 1/2, 1/2},
            {3/8, -1/2, -1/2, 1/2, 1/2, 1/2},
            {-1/2, -1/2, -1/2, 1/2, 1/2, -3/8},
            {-1/2, -1/2, 3/8, 1/2, 1/2, 1/2}},
    },
    paramtype = "light",
    is_ground_content = false,
    groups = {choppy = 3},
    sounds =  default.node_sound_wood_defaults(),
    on_punch = function(pos, node, puncher, pointed_thing)
        local wielded_item = puncher:get_wielded_item():get_name()
        if compost.can_compost(wielded_item) then
            minetest.set_node(pos, {name = "compost:wood_barrel_1"})
            local w = puncher:get_wielded_item()
            if not(minetest.setting_getbool("creative_mode")) then
                w:take_item(1)
                puncher:set_wielded_item(w)
            end
        end
    end
})

minetest.register_node("compost:wood_barrel_1", {
    description = "Wood Barrel with compost",
    tiles = {"default_wood.png^compost_compost_1.png", "default_wood.png"},
    drawtype = "nodebox",
    node_box = {
        type = "fixed",
        fixed = {{-1/2, -1/2, -1/2, 1/2, -3/8, 1/2},
            {-1/2, -1/2, -1/2, -3/8, 1/2, 1/2},
            {3/8, -1/2, -1/2, 1/2, 1/2, 1/2},
            {-1/2, -1/2, -1/2, 1/2, 1/2, -3/8},
            {-1/2, -1/2, 3/8, 1/2, 1/2, 1/2},
            {-3/8, -1/2, -3/8, 3/8, 3/8, 3/8}},
    },
    paramtype = "light",
    is_ground_content = false,
    groups = {choppy = 3},
    sounds =  default.node_sound_wood_defaults(),
})

minetest.register_node("compost:wood_barrel_2", {
    description = "Wood Barrel with compost",
    tiles = {"default_wood.png^compost_compost_2.png", "default_wood.png"},
    drawtype = "nodebox",
    node_box = {
        type = "fixed",
        fixed = {{-1/2, -1/2, -1/2, 1/2, -3/8, 1/2},
            {-1/2, -1/2, -1/2, -3/8, 1/2, 1/2},
            {3/8, -1/2, -1/2, 1/2, 1/2, 1/2},
            {-1/2, -1/2, -1/2, 1/2, 1/2, -3/8},
            {-1/2, -1/2, 3/8, 1/2, 1/2, 1/2},
            {-3/8, -1/2, -3/8, 3/8, 3/8, 3/8}},
    },
    paramtype = "light",
    is_ground_content = false,
    groups = {choppy = 3},
    sounds =  default.node_sound_wood_defaults(),
})

minetest.register_node("compost:wood_barrel_3", {
    description = "Wood Barrel",
    tiles = {"default_wood.png^compost_compost_3.png", "default_wood.png"},
    drawtype = "nodebox",
    node_box = {
        type = "fixed",
        fixed = {{-1/2, -1/2, -1/2, 1/2, -3/8, 1/2},
            {-1/2, -1/2, -1/2, -3/8, 1/2, 1/2},
            {3/8, -1/2, -1/2, 1/2, 1/2, 1/2},
            {-1/2, -1/2, -1/2, 1/2, 1/2, -3/8},
            {-1/2, -1/2, 3/8, 1/2, 1/2, 1/2},
            {-3/8, -1/2, -3/8, 3/8, 3/8, 3/8}},
    },
    paramtype = "light",
    is_ground_content = false,
    groups = {choppy = 3},
    sounds =  default.node_sound_wood_defaults(),
    on_punch = function(pos, node, player, pointed_thing)
        local p = {x = pos.x + math.random(0, 5)/5 - 0.5, y = pos.y+1, z = pos.z + math.random(0, 5)/5 - 0.5}
        minetest.add_item(p, {name = "compost:compost"})
        minetest.set_node(pos, {name = "compost:wood_barrel"})
    end
})

minetest.register_abm({
    nodenames = {"compost:wood_barrel_1"},
    interval = 30,
    chance = 5,
    action = function(pos, node, active_object_count, active_object_count_wider)
        minetest.set_node(pos, {name = "compost:wood_barrel_2"})
    end,
})

minetest.register_abm({
    nodenames = {"compost:wood_barrel_2"},
    interval = 30,
    chance = 3,
    action = function(pos, node, active_object_count, active_object_count_wider)
        minetest.set_node(pos, {name = "compost:wood_barrel_3"})
    end,
})

minetest.register_craft({
    output = "compost:wood_barrel",
    recipe = {
        {"default:wood", "", "default:wood"},
        {"default:wood", "", "default:wood"},
        {"default:wood", "stairs:slab_wood", "default:wood"}
    }
})

minetest.register_node("compost:compost", {
    description = "Compost",
    tiles = {"compost_compost.png"},
    groups = {crumbly = 3},
    sounds =  default.node_sound_dirt_defaults(),
})

minetest.register_node("compost:garden_soil", {
    description = "Garden Soil",
    tiles = {"compost_garden_soil.png"},
    groups = {crumbly = 3, soil=3, grassland = 1, wet = 1},
    sounds =  default.node_sound_dirt_defaults(),
})

minetest.register_craft({
    output = "compost:garden_soil",
    recipe = {
        {"compost:compost", "compost:compost"},
    }
})

if minetest.get_modpath ("tubelib") and tubelib then
    print ("[compost] found tubelib")

    -- Thanks to @joe7575
    tubelib.register_node ("compost:wood_barrel",  {
            "compost:wood_barrel_1",
            "compost:wood_barrel_2",
            "compost:wood_barrel_3"
        }, {
            on_push_item = function  (pos, side, item, player_name)
                local node = minetest.get_node (pos)

                if node.name == "compost:wood_barrel" and compost.can_compost(item:get_name()) then
                    minetest.set_node(pos, {name = "compost:wood_barrel_1"})
                    return true
                else
                    return false
                end
            end,

            on_unpull_item = function  (pos, side, item, player_name)
                minetest.set_node(pos, {name = "compost:wood_barrel_3"})
                return true
            end,

            on_pull_item = function  (pos, side, player_name)
                local node = minetest.get_node (pos)

                if node.name == "compost:wood_barrel_3" then
                    minetest.set_node(pos, {name = "compost:wood_barrel"})
                    return ItemStack("compost:compost")
                end

                return nil
            end,
    })
end