--[[

  nodes.lua - basic node blocks for Inside The Box

]]--

--
-- visual marker for where breakable nodes can be placed
--

local tilecache = {}
local get_tiles = function(name)
	if tilecache[name] then
		return tilecache[name]
	else
		local def = minetest.registered_nodes[name]
		local tex = minetest.inventorycube(
			def.tiles[1] and def.tiles[1].name or def.tiles[1],
			def.tiles[2] and def.tiles[2].name or
			def.tiles[1] and def.tiles[1].name or def.tiles[1],
			def.tiles[3] and def.tiles[3].name or
			def.tiles[2] and def.tiles[2].name or
			def.tiles[1] and def.tiles[1].name or def.tiles[1]
		)
		tilecache[name] = tex
		return tex
	end
end

--
-- handle placement for breakable nodes
--
local on_place_breakable = function(itemstack, placer, pointed_thing)
	-- not a node?
	if not pointed_thing or pointed_thing.type ~= "node" then
		return itemstack
	end
	-- pass through?
	local under = minetest.get_node(pointed_thing.under)
	local udef = minetest.registered_nodes[under.name]
	if udef.on_rightclick then
		return udef.on_rightclick(pointed_thing.under, under, placer, itemstack, pointed_thing)
	end
	-- placeable here?
	local pos = pointed_thing.above
	local node = minetest.get_node(pos)
	local place = itemstack:get_name()
	local name = placer:get_player_name()
	-- editing or playing?
	if boxes.players_editing_boxes[name] then
		-- holding SHIFT?
		if placer:get_player_control().sneak then
			-- param2
			local def = minetest.registered_nodes[place]
			local param2 = 0
			if def.place_param2 ~= nil then
				param2 = def.place_param2
			elseif def.paramtype2 == "wallmounted" then
				param2 = minetest.dir_to_wallmounted(vector.subtract(
					pointed_thing.under, pointed_thing.above))
			elseif def.paramtype2 == "facedir" then
				param2 = minetest.dir_to_facedir(vector.subtract(
					pointed_thing.under, pointed_thing.above))
			end
			minetest.set_node(pos, {name = place, param2 = param2})
			return itemstack
		end
		if node.name ~= "air" and node.name ~= "nodes:placeholder" then
			minetest.chat_send_player(name, "Can only place this node at an empty node. Clear the space first")
			return itemstack
		end
		-- place placeholder information
		minetest.set_node(pos, {name = "nodes:placeholder"})
		local meta = minetest.get_meta(pos)
		local placeable = meta:get_string("placeable")
		if placeable == "" then
			meta:set_string("placeable", minetest.write_json({[place] = true}))
		else
			local t = minetest.parse_json(placeable)
			t[place] = true
			meta:set_string("placeable", minetest.write_json(t))
		end

	elseif boxes.players_in_boxes[name] then
		-- check meta if we can place here
		local meta = minetest.get_meta(pos)
		local placeable = meta:get_string("placeable")
		if placeable == "" then
			return itemstack
		end
		local t = minetest.parse_json(placeable)
		if not t[place] then
			return itemstack
		end
		-- place and remove one from itemstack
		itemstack:take_item()
		-- param2
		local def = minetest.registered_nodes[place]
		local param2 = 0
		if def.place_param2 ~= nil then
			param2 = def.place_param2
		elseif def.paramtype2 == "wallmounted" then
			param2 = minetest.dir_to_wallmounted(vector.subtract(
				pointed_thing.under, pointed_thing.above))
		elseif def.paramtype2 == "facedir" then
			param2 = minetest.dir_to_facedir(vector.subtract(
				pointed_thing.under, pointed_thing.above))
		end
		minetest.set_node(pos, {name = place, param2 = param2})
		minetest.check_for_falling(pos)
		-- preserve metadata
		meta = minetest.get_meta(pos)
		meta:set_string("placeable", placeable)
		return itemstack
	else
		minetest.log("info", name .. " attempted to place a " .. place .. " outside a box")
		return itemstack
	end
end

local function after_dig_node_breakable(pos, oldnode, oldmetadata, digger)
	-- preserve metadata
	minetest.set_node(pos, {name = "nodes:placeholder"})
	if not oldmetadata.fields or not oldmetadata.fields.placeable then
		return
	end
	local meta = minetest.get_meta(pos)
	meta:set_string("placeable", oldmetadata.fields.placeable)
end

local function placeholder_particles(pos)
	local meta = minetest.get_meta(pos)
	local placeable = meta:get_string("placeable")
	if placeable == "" then
		return false
	end
	local nodes =  minetest.parse_json(placeable)
	for _, obj in pairs(minetest.get_objects_inside_radius(pos, 3)) do
		if obj:is_player() then
			local itemstack = obj:get_wielded_item()
			local name = itemstack:get_name()
			if itemstack and nodes[name] then
				minetest.add_particle({
					pos = pos,
					expirationtime = 0.55,
					size = 5,
					texture = get_tiles(name),
					glow = 14,
				})
			end
		end
	end
	return true
end

minetest.register_node("nodes:placeholder", {
	description = "Placeable node location placeholder",
	inventory_image = "air.png",
	wield_image = "air.png",
	drawtype = "airlike",
	paramtype = "light",
	sunlight_propagates = true,
	walkable = false,
	pointable = false,
	diggable = false,
	buildable_to = true,
	floodable = true,
	air_equivalent = true,
	drop = "",
	groups = {not_in_creative_inventory=1},
	on_timer = placeholder_particles,
	on_construct = function(pos)
		minetest.get_node_timer(pos):start(0.5)
	end,
	after_box_construct = function(pos)
		minetest.get_node_timer(pos):start(0.5)
	end,
})


-- table format:
-- [1] name, also used for texture
-- [2] true for stair/slab
-- [3] tool if diggable version needs to be added
-- [4] sounds
-- [5] falling node

local nodes = {
	{"bricks_clay", true, "pickaxe", sounds.stone},
	{"bricks_limestone", true, "pickaxe", sounds.stone},
	{"bricks_marble", true, "pickaxe", sounds.stone},
	{"bricks_sandstone", true, "pickaxe", sounds.stone},
	{"bricks_stone", true, "pickaxe", sounds.stone},
	{"bricks_stone_moss", true, "pickaxe", sounds.stone},
	{"cobble", true, "pickaxe", sounds.stone},
	{"cobble_moss", true, "pickaxe", sounds.stone},
	{"limestone", true, "pickaxe", sounds.stone},
	{"marble", true, "pickaxe", sounds.stone},
	{"sandstone", true, "pickaxe", sounds.stone},
	{"stone", true, "pickaxe", sounds.stone},
	{"stone_moss", true, "pickaxe", sounds.stone},
	{"obsidian", true, false, sounds.stone},
	{"bronze", false, "pickaxe", sounds.metal},
	{"gold", false, "pickaxe", sounds.metal},
	{"emerald", false, "pickaxe", sounds.stone},
	{"iron", false, "pickaxe", sounds.metal},
	{"clay", false, "shovel", sounds.dirt},
	{"dirt", false, "shovel", sounds.dirt},
	{"gravel", false, "shovel", sounds.gravel, 1},
	{"sand", false, "shovel", sounds.sand, 1},
	{"wood_dark", true, "axe", sounds.wood},
	{"wood_light", true, "axe", sounds.wood},
	{"wood_medium", true, "axe", sounds.wood},
	{"grass", false, false, sounds.grass},
	{"snow", false, "shovel", sounds.snow},
	{"ice", false, "pickaxe", sounds.stone},
	{"ore_black", false, "pickaxe", sounds.stone},
	{"ore_blue", false, "pickaxe", sounds.stone},
	{"ore_brown", false, "pickaxe", sounds.stone},
	{"ore_cyan", false, "pickaxe", sounds.stone},
	{"ore_gold", false, "pickaxe", sounds.stone},
	{"ore_green", false, "pickaxe", sounds.stone},
	{"ore_red", false, "pickaxe", sounds.stone},
}


local function make_stair_slab(name, groups, b1, b2, snd, tex)
	if not tex then
		tex = name
	end
	minetest.register_node("nodes:" .. name .. b1 .. "_stairs", {
		description = name .. " stairs" .. b2,
		tiles = {tex .. ".png"},
		drawtype = "mesh",
		mesh = "stairs_stair.obj",
		paramtype = "light",
		paramtype2 = "facedir",
		groups = groups,
		selection_box = {
			type = "fixed",
			fixed = {
				{-1/2, -1/2, -1/2, 1/2, 0, 1/2},
				{-1/2, 0, 0, 1/2, 1/2, 1/2},
			},
		},
		collision_box = {
			type = "fixed",
			fixed = {
				{-1/2, -1/2, -1/2, 1/2, 0, 1/2},
				{-1/2, 0, 0, 1/2, 1/2, 1/2},
			},
		},
		sounds = snd,
	})
	minetest.register_node("nodes:" .. name .. b1 .. "_slab", {
		description = name .. " slab" .. b2,
		tiles = {tex .. ".png"},
		drawtype = "nodebox",
		paramtype = "light",
		paramtype2 = "facedir",
		groups = groups,
		node_box = {
			type = "fixed",
			fixed = {-1/2, -1/2, -1/2, 1/2, 0, 1/2},
		},
		sounds = snd,
	})
end

for _, v in pairs(nodes) do
	local groups = {node = 1}
	if v[5] then
		groups.falling_node = 1
	end
	if v[4] == sounds.stone then
		groups.stone = 1
	elseif v[4] == sounds.wood then
		groups.wood = 1
	end
	if v[3] then
		-- register diggable node version
		local gg = table.copy(groups)
		gg[v[3]] = 3
		minetest.register_node("nodes:" .. v[1] .. "_breakable", {
			description = v[1] .. " (breakable)",
			tiles = {v[1] .. ".png"},
			groups = gg,
			sounds = v[4],
			on_place = on_place_breakable,
			after_dig_node = after_dig_node_breakable,
			node_placement_prediction = "",
		})
		if v[2] then
			make_stair_slab(v[1], gg, "_breakable", " (breakable)", v[4])
		end
		frame.register("nodes:" .. v[1] .. "_breakable")
	end
	groups.unbreakable = 1
	minetest.register_node("nodes:" .. v[1], {
		description = v[1],
		tiles = {v[1] .. ".png"},
		groups = groups,
		sounds = v[4],
	})
	if v[2] then
		make_stair_slab(v[1], groups, "", "")
		walls.register("nodes:" .. v[1] .. "_wall", v[1] .. " Wall", v[1] .. ".png", v[4], groups)
	end
end

minetest.register_node("nodes:marbleb", {
	description = "Marble border",
	tiles = {"marble.png"},
	unpushable = true,
	groups = {not_in_creative_inventory = 1, stone = 1},
	sounds = sounds.stone,
})

minetest.register_node("nodes:bronzeb", {
	description = "Bronze border",
	tiles = {"bronze.png"},
	unpushable = true,
	groups = {not_in_creative_inventory = 1},
	sounds = sounds.metal,
})


--
-- wool
--
for _, v in pairs({"yellow", "white", "violet", "red",
		"pink", "orange", "magenta", "grey",
		"green", "dark_grey", "dark_green", "cyan",
		"brown", "blue", "black"}) do
	minetest.register_node("nodes:wool_" .. v, {
		description = v .. " wool",
		tiles = {"itb_wool_" .. v .. ".png"},
		groups = {node = 1, unbreakable = 1},
		sounds = sounds.cloth,
	})
	minetest.register_node("nodes:carpet_" .. v, {
		description = v .. " carpet",
		tiles = {"itb_wool_" .. v .. ".png"},
		groups = {node = 1, unbreakable = 1},
		sounds = sounds.cloth,
		sunlight_propagates = true,
		paramtype = "light",
		paramtype2 = "facedir",
		drawtype = "nodebox",
		node_box = {
			type = "fixed",
			fixed = {
				{-7/16, -1/2, -7/16, 7/16, -7/16, 7/16},
			},
		},
	})
	make_stair_slab("wool_" .. v, {node = 1, unbreakable = 1}, "", "", sounds.cloth, "itb_wool_" .. v)
	minetest.register_node("nodes:wool_" .. v .. "_breakable", {
		description = v .. " wool (breakable",
		tiles = {"itb_wool_" .. v .. ".png"},
		groups = {axe = 1, node = 1},
		sounds = sounds.cloth,
		on_place = on_place_breakable,
		after_dig_node = after_dig_node_breakable,
		node_placement_prediction = "",
	})
	make_stair_slab("wool_" .. v, {axe = 1, node = 1}, "_breakable", " (breakable)", sounds.cloth, "itb_wool_" .. v)
	frame.register("nodes:wool_" .. v .. "_breakable")
end

-- trunks and leaves
for _, v in pairs({
	"light",
	"medium",
	"dark"
}) do
	minetest.register_node("nodes:trunk_" .. v .. "_breakable", {
		description = v .. " trunk (breakable)",
		tiles = {"trunk_" .. v .. "_top.png", "trunk_" .. v .. "_top.png", "trunk_" .. v .. ".png"},
		groups = {axe = 1, node = 1, wood = 1},
		paramtype2 = "facedir",
		sounds = sounds.wood,
		on_place = on_place_breakable,
		after_dig_node = after_dig_node_breakable,
		node_placement_prediction = "",
	})

	minetest.register_node("nodes:trunk_" .. v .. "", {
		description = v .. " trunk",
		tiles = {"trunk_" .. v .. "_top.png", "trunk_" .. v .. "_top.png", "trunk_" .. v .. ".png"},
		groups = {node = 1, unbreakable = 1, wood = 1},
		paramtype2 = "facedir",
		sounds = sounds.wood,
	})
	frame.register("nodes:trunk_" .. v .. "_breakable")

	minetest.register_node("nodes:leaves_" .. v .. "_breakable", {
		description = v .. " leaves (breakable)",
		drawtype = "allfaces_optional",
		paramtype = "light",
		tiles = {"leaves_" .. v .. ".png"},
		groups = {node = 1, axe = 1, leaves = 1},
		sounds = sounds.leaves,
		on_place = on_place_breakable,
		after_dig_node = after_dig_node_breakable,
		node_placement_prediction = "",
	})
	minetest.register_node("nodes:leaves_" .. v, {
		description = v .. " leaves",
		drawtype = "allfaces_optional",
		paramtype = "light",
		tiles = {"leaves_" .. v .. ".png"},
		groups = {node = 1, unbreakable = 1, leaves = 1},
		sounds = sounds.leaves,
	})
end

-- barrier
minetest.register_node("nodes:barrier", {
	description = "Barrier",
	pointable = true, -- make it easy to understand that it's a barrier
	drawtype = "airlike",
	inventory_image = "barrier.png",
	sunlight_propagates = true,
	paramtype = "light",
	unpushable = true,
	groups = {unbreakable = 1, node = 1, fall_damage_add_percent = 1000},
	collision_box = {
		type = "fixed",
		-- oversized to prevent crawling through
		fixed = {-1,-0.5,-1,1,1,1},
	},
})

local function lamp_on_untrigger(pos)
	local meta = minetest.get_meta(pos)
	local node = minetest.get_node(pos)
	meta:set_string("on_name", node.name)
	node.name = "nodes:lamp_bar_0"
	minetest.swap_node(pos, node)
end

-- glass
minetest.register_node("nodes:glass", {
	description = "glass",
	drawtype = "glasslike_framed_optional",
	sunlight_propagates = true,
	paramtype = "light",
	tiles = {"glass.png"},
	groups = {node = 1, unbreakable = 1},
	sounds = sounds.glass,
})

minetest.register_node("nodes:glass_breakable", {
	description = "glass (breakable)",
	drawtype = "glasslike_framed_optional",
	sunlight_propagates = true,
	paramtype = "light",
	tiles = {"glass.png"},
	groups = {node = 1, pickaxe = 1},
	sounds = sounds.glass,
	on_place = on_place_breakable,
	after_dig_node = after_dig_node_breakable,
	node_placement_prediction = "",
})
frame.register("nodes:glass_breakable")

-- light fixtures
for _, v in pairs({14, 11, 8, 0}) do
	local on_trigger = function(pos) end
	local on_untrigger = function(pos) end
	if v == 0 then
		on_trigger = function(pos)
			local meta = minetest.get_meta(pos)
			local node = minetest.get_node(pos)
			local new_name = meta:get_string("on_name")
			if new_name ~= "" then
				node.name = new_name
				minetest.swap_node(pos, node)
				if string.find(new_name, "broken") then
					minetest.get_node_timer(pos):start(math.random(50)/10)
				end
			end
		end
	else
		on_untrigger = lamp_on_untrigger
	end
	minetest.register_node("nodes:lamp_bar_" .. v, {
		description = "A Lamp (" .. v .. ")",
		light_source = v,
		sunlight_propagates = true,
		tiles = {"lamp_bar.png"},
		paramtype = "light",
		paramtype2 = "facedir",
		walkable = false,
		drawtype = "nodebox",
		node_box = {
			type = "fixed",
			fixed = {-1, 1/4, 1/4, 1, 1/2, 1/2},
		},
		groups = {node = 1, unbreakable = 1},
		sounds = sounds.glass,
		on_rotate = screwdriver.rotate_simple(),
		on_trigger = on_trigger,
		on_untrigger = on_untrigger,
		after_dig_node = mech.after_dig,
	})
end

minetest.register_node("nodes:lamp_bar_broken", {
	description = "A Broken Lamp (flickering)",
	light_source = 8,
	sunlight_propagates = true,
	tiles = {"lamp_bar.png"},
	paramtype = "light",
	paramtype2 = "facedir",
	walkable = false,
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {-1, 1/4, 1/4, 1, 1/2, 1/2},
	},
	groups = {node = 1, unbreakable = 1},
	sounds = sounds.glass,
	on_rotate = screwdriver.rotate_simple(),
	on_trigger = function(pos) end,
	on_untrigger = lamp_on_untrigger,
	on_timer = function(pos)
		local node = minetest.get_node(pos)
		minetest.set_node(pos, {name = "nodes:lamp_bar_broken_off", param2 = node.param2})
	end,
	on_construct = function(pos)
		minetest.get_node_timer(pos):start(math.random(50)/10)
	end,
	after_dig_node = mech.after_dig,
})

minetest.register_node("nodes:lamp_bar_broken_off", {
	description = "A Broken Lamp (flickering, off)",
	sunlight_propagates = true,
	tiles = {"lamp_bar.png"},
	paramtype = "light",
	paramtype2 = "facedir",
	walkable = false,
	drawtype = "nodebox",
	node_box = {
		type = "fixed",
		fixed = {-1, 1/4, 1/4, 1, 1/2, 1/2},
	},
	groups = {node = 1, unbreakable = 1},
	sounds = sounds.glass,
	on_rotate = screwdriver.rotate_simple(),
	on_trigger = function(pos) end,
	on_untrigger = lamp_on_untrigger,
	on_timer = function(pos)
		local node = minetest.get_node(pos)
		minetest.set_node(pos, {name = "nodes:lamp_bar_broken", param2 = node.param2})
	end,
	on_construct = function(pos)
		minetest.get_node_timer(pos):start(math.random(50)/10)
	end,
	after_dig_node = mech.after_dig,
})

for _, wood in ipairs({"wood_dark", "wood_light", "wood_medium"}) do
	fences.register_fence("nodes:fence_" .. wood, {
		description = wood .. " Fence",
		texture = wood .. "_fence.png",
		inventory_image = "default_fence_overlay.png^" .. wood .. ".png^default_fence_overlay.png^[makealpha:255,126,126",
		wield_image = "default_fence_overlay.png^" .. wood .. ".png^default_fence_overlay.png^[makealpha:255,126,126",
		groups = {node = 1, unbreakable = 1, wood = 1},
		sounds = sounds.wood,
	})
end

-- ladders, rope & vines
for _, n in pairs({
	{"ladder", "signlike"},
	{"rope", "plantlike"},
	{"vine", "signlike"},
}) do
	minetest.register_node("nodes:" .. n[1], {
		description = n[1],
		drawtype = n[2],
		tiles = {n[1] .. ".png"},
		inventory_image = n[1] .. ".png",
		paramtype = "light",
		paramtype2 = "wallmounted",
		sunlight_propagates = true,
		walkable = false,
		climbable = true,
		selection_box = n[2] == "signlike" and {type = "wallmounted"},
		groups = {node = 1, unbreakable = 1},
		sounds = sounds.wood,
	})
	minetest.register_node("nodes:" .. n[1] .. "_breakable", {
		description = n[1] .. "(breakable)",
		drawtype = n[2],
		tiles = {n[1] .. ".png"},
		inventory_image = n[1] .. ".png",
		paramtype = "light",
		paramtype2 = "wallmounted",
		sunlight_propagates = true,
		walkable = false,
		climbable = true,
		selection_box = n[2] == "signlike" and {type = "wallmounted"},
		groups = {node = 1, axe = 1},
		sounds = sounds.wood,
		on_place = on_place_breakable,
		after_dig_node = after_dig_node_breakable,
		node_placement_prediction = "",
	})
	frame.register("nodes:" .. n[1] .. "_breakable")
end

minetest.register_node("nodes:waterlily", {
	description = "Waterlily",
	drawtype = "nodebox",
	sunlight_propagates = true,
	tiles = {"waterlily.png"},
	walkable = true,
	node_box = {
		type = "fixed",
		fixed = {-1/2, -1/2, -1/2, 1/2, -7/16, 1/2}
	},
	liquids_pointable = true,
	paramtype = "light",
	paramtype2 = "facedir",
	on_place = function(itemstack, placer, pointed_thing)
		local pos = pointed_thing.under
		if not pos then
			return itemstack
		end
		local node = minetest.get_node(pos)
		if not node then
			return itemstack
		end

		local name = itemstack:get_name()

		local rng = PseudoRandom(pos.x % 16 + ((pos.z % 16) * 16) + ((pos.y % 16) * 256))
		minetest.set_node(pointed_thing.above, {name = name, param2 = rng:next(0, 3)})
	end,
})


-- special nodes
--	liquids
minetest.register_node("nodes:water_source", {
	description = "Water Source",
	drawtype = "liquid",
	tiles = {
		{
			name = "water_source_animated.png",
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 2.0,
			},
		},
	},
	special_tiles = {
		-- New-style water source material (mostly unused)
		{
			name = "water_source_animated.png",
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 2.0,
			},
			backface_culling = false,
		},
	},
	alpha = 160,
	paramtype = "light",
	walkable = false,
	pointable = false,
	diggable = false,
	buildable_to = true,
	is_ground_content = false,
	drop = "",
	drowning = 1,
	liquidtype = "source",
	liquid_alternative_flowing = "nodes:water_flowing",
	liquid_alternative_source = "nodes:water_source",
	liquid_viscosity = 1,
	post_effect_color = {a = 203, r = 30, g = 60, b = 90},
	groups = {water = 3, liquid = 3, puts_out_fire = 1, cools_lava = 1},
	sounds = sounds.water,
})

minetest.register_node("nodes:water_flowing", {
	description = "Flowing Water",
	drawtype = "flowingliquid",
	tiles = {"water.png"},
	special_tiles = {
		{
			name = "water_flowing_animated.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 0.8,
			},
		},
		{
			name = "water_flowing_animated.png",
			backface_culling = true,
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 0.8,
			},
		},
	},
	alpha = 160,
	paramtype = "light",
	paramtype2 = "flowingliquid",
	walkable = false,
	pointable = false,
	diggable = false,
	buildable_to = true,
	is_ground_content = false,
	drop = "",
	drowning = 1,
	liquidtype = "flowing",
	liquid_alternative_flowing = "nodes:water_flowing",
	liquid_alternative_source = "nodes:water_source",
	liquid_viscosity = 1,
	post_effect_color = {a = 203, r = 30, g = 60, b = 90},
	groups = {water = 3, liquid = 3, puts_out_fire = 1,
		not_in_creative_inventory = 1, cools_lava = 1},
	sounds = sounds.water,
})


minetest.register_node("nodes:river_water_source", {
	description = "River Water Source",
	drawtype = "liquid",
	tiles = {
		{
			name = "river_water_source_animated.png",
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 2.0,
			},
		},
	},
	special_tiles = {
		{
			name = "river_water_source_animated.png",
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 2.0,
			},
			backface_culling = false,
		},
	},
	alpha = 160,
	paramtype = "light",
	walkable = false,
	pointable = false,
	diggable = false,
	buildable_to = true,
	is_ground_content = false,
	drop = "",
	drowning = 1,
	liquidtype = "source",
	liquid_alternative_flowing = "nodes:river_water_flowing",
	liquid_alternative_source = "nodes:river_water_source",
	liquid_viscosity = 1,
	liquid_renewable = false,
	liquid_range = 2,
	post_effect_color = {a = 203, r = 30, g = 76, b = 90},
	groups = {water = 3, liquid = 3, puts_out_fire = 1, cools_lava = 1},
	sounds = sounds.water,
})

minetest.register_node("nodes:river_water_flowing", {
	description = "Flowing River Water",
	drawtype = "flowingliquid",
	tiles = {"river_water.png"},
	special_tiles = {
		{
			name = "river_water_flowing_animated.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 0.8,
			},
		},
		{
			name = "river_water_flowing_animated.png",
			backface_culling = true,
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 0.8,
			},
		},
	},
	alpha = 160,
	paramtype = "light",
	paramtype2 = "flowingliquid",
	walkable = false,
	pointable = false,
	diggable = false,
	buildable_to = true,
	is_ground_content = false,
	drop = "",
	drowning = 1,
	liquidtype = "flowing",
	liquid_alternative_flowing = "nodes:river_water_flowing",
	liquid_alternative_source = "nodes:river_water_source",
	liquid_viscosity = 1,
	liquid_renewable = false,
	liquid_range = 2,
	post_effect_color = {a = 203, r = 30, g = 76, b = 90},
	groups = {water = 3, liquid = 3, puts_out_fire = 1,
		not_in_creative_inventory = 1, cools_lava = 1},
	sounds = sounds.water,
})


minetest.register_node("nodes:lava_source", {
	description = "Lava Source",
	drawtype = "liquid",
	tiles = {
		{
			name = "lava_source_animated.png",
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 3.0,
			},
		},
	},
	special_tiles = {
		-- New-style lava source material (mostly unused)
		{
			name = "lava_source_animated.png",
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 3.0,
			},
			backface_culling = false,
		},
	},
	paramtype = "light",
	light_source = 8,
	walkable = false,
	pointable = false,
	diggable = false,
	buildable_to = true,
	is_ground_content = false,
	drop = "",
	drowning = 1,
	liquidtype = "source",
	liquid_alternative_flowing = "nodes:lava_flowing",
	liquid_alternative_source = "nodes:lava_source",
	liquid_viscosity = 7,
	liquid_renewable = false,
	damage_per_second = 4 * 2,
	post_effect_color = {a = 191, r = 255, g = 64, b = 0},
	groups = {lava = 3, liquid = 2, igniter = 1},
	sounds = sounds.water,
})

minetest.register_node("nodes:lava_flowing", {
	description = "Flowing Lava",
	drawtype = "flowingliquid",
	tiles = {"lava.png"},
	special_tiles = {
		{
			name = "lava_flowing_animated.png",
			backface_culling = false,
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 3.3,
			},
		},
		{
			name = "lava_flowing_animated.png",
			backface_culling = true,
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 3.3,
			},
		},
	},
	paramtype = "light",
	paramtype2 = "flowingliquid",
	light_source = 8,
	walkable = false,
	pointable = false,
	diggable = false,
	buildable_to = true,
	is_ground_content = false,
	drop = "",
	drowning = 1,
	liquidtype = "flowing",
	liquid_alternative_flowing = "nodes:lava_flowing",
	liquid_alternative_source = "nodes:lava_source",
	liquid_viscosity = 7,
	liquid_renewable = false,
	damage_per_second = 4 * 2,
	post_effect_color = {a = 191, r = 255, g = 64, b = 0},
	groups = {lava = 3, liquid = 2, igniter = 1,
		not_in_creative_inventory = 1},
	sounds = sounds.water,
})

-- lava cooling ABM
lava_check_pos = {
	{x = 0, y = 1, z = 0},
	{x = 1, y = 0, z = 0},
	{x = 0, y = 0, z = 1},
	{x = -1, y = 0, z = 0},
	{x = 0, y = 0, z = -1},
	{x = 0, y = -1, z = 0},
}
minetest.register_abm({
	label = "lava cooling abm",
	nodenames = {"group:lava"},
	neighbors = {"group:cools_lava"},
	interval = 1, -- as fast as server allows, usually 1
	chance = 1,
	action = function(pos)
		for k, v in pairs(lava_check_pos) do
			local node = minetest.get_node(vector.add(pos, v))
			local def = minetest.registered_nodes[node.name]
			if def.groups.cools_lava then
				if k == 1 and minetest.get_node(pos).name == "nodes:lava_source" then
					minetest.set_node(pos, {name = "nodes:obsidian"})
				else
					minetest.set_node(pos, {name = "nodes:cobble_breakable"})
				end
				return
			end
		end
	end,
})


--
-- particles
--
minetest.register_abm({
	label = "smoke",
	nodenames = {"group:torch", "nodes:fire"},
	neighbors = {"air"},
	interval = 0.1,
	chance = 100,
	catch_up = false,
	action = function(pos, node)
		pos.y = pos.y + 0.5
		minetest.add_particle({
			pos = vector.add(pos, math.random(50)/100 - 0.25),
			velocity = {x = math.random(20)/100 - 0.1, y = 0.3, z = math.random(20)/100 - 0.1},
			expirationtime = 2.3,
			size = math.random(10)/5 + 2,
			texture = "smoke_animated.png",
			animation = {
				type = "sheet_2d",
				frames_w = 8,
				frames_h = 1,
				frame_length = 0.3,
			},
		})
	end,
})

minetest.register_abm({
	label = "lava_bubble",
	nodenames = {"group:lava"},
	neighbors = {"air"},
	interval = 0.1,
	chance = 200,
	catch_up = false,
	action = function(pos, node, a, b)
		pos.y = pos.y + 0.5
		minetest.add_particle({
			pos = vector.add(pos, math.random(50)/100 - 0.25),
			velocity = {x = 0, y = 0.2, z = 0},
			expirationtime = 0.78,
			size = math.random(10)/5 + 1,
			texture = "lava_bubble_animated.png",
			glow = 13,
			animation = {
				type = "sheet_2d",
				frames_w = 8,
				frames_h = 1,
				frame_length = 0.1,
			},
		})
	end,
})


--	tnt
--	fire
minetest.register_node("nodes:fire", {
	description = "Fire",
	drawtype = "firelike",
	tiles = {
		{
			name = "fire_animated.png",
			animation = {
				type = "vertical_frames",
				aspect_w = 16,
				aspect_h = 16,
				length = 1.6,
			},
		},
	},
	inventory_image = "fire.png",
	paramtype = "light",
	light_source = 13,
	walkable = false,
	buildable_to = true,
	sunlight_propagates = true,
	damage_per_second = 4,
	groups = {igniter = 2},
	drop = "",
})
frame.register("nodes:fire")


-- chests:
--   empty (fake) chest
--   chest-with-key
--   chest-with-tool
for _, name in ipairs({
		"nothing",
		"boxes:nexus",
		"tools:axe",
		"tools:pickaxe",
		"tools:shovel",
		"tools:sword",
		"tools:flint_and_steel",
}) do
	minetest.register_node("nodes:chest_with_" .. string.gsub(name, ":", "_"), {
		description = "Chest with " .. name,
		drawtype = "mesh",
		paramtype = "light",
		paramtype2 = "facedir",
		mesh = "chest_close.obj",
		tiles = {"chest.png"},
		on_rightclick = function(pos, node, clicker, itemstack, pointed_thing)
			minetest.sound_play("chest_open", {pos = pos})
			node.name = "nodes:chest_open"
			mech.trigger(pos)
			minetest.after(1.0, mech.untrigger, pos)
			minetest.swap_node(pos, node)
			minetest.get_node_timer(pos):start(3.0)
			if name ~= "nothing" then
				if itemstack:item_fits(name) then
					itemstack:add_item(name)
					return itemstack
				end
				clicker:get_inventory():add_item("main", name)
			end
			return itemstack
		end,
	})
end
minetest.register_alias("nodes:chest_with_boxes_findme_item", "nodes:chest_with_boxes_nexus")

minetest.register_node("nodes:chest_open", {
	description = "Chest",
	drawtype = "mesh",
	paramtype = "light",
	paramtype2 = "facedir",
	mesh = "chest_open.obj",
	tiles = {"chest.png"},
	on_timer = function(pos)
		minetest.sound_play("chest_close", {pos = pos})
		local node = minetest.get_node(pos)
		minetest.swap_node(pos, {name = "nodes:chest_with_nothing", param2 = node.param2})
	end,
	groups = {node = 0},
})



--   grass variants
--   flowers
--   farming plants
--   flowerpot combos
for _, n in pairs({
	{"grass_1", 56},
	{"grass_2", 56},
	{"grass_3", 56},
	{"grass_4", 56},
	{"grass_5", 56},
	{"rose", 9},
	{"dandelion", 9},
	{"white_tulip", 9},
	{"allium", 9},
	{"orchid", 9},
	{"daisy", 9},
	{"houstonia", 9},
	{"paeonia", 9},
	{"wheat_stage_0", 11},
	{"wheat_stage_1", 11},
	{"wheat_stage_2", 11},
	{"wheat_stage_3", 11},
	{"wheat_stage_4", 11},
	{"wheat_stage_5", 11},
	{"wheat_stage_6", 11},
	{"wheat_stage_7", 11},
	{"potatoes_stage_0", 10},
	{"potatoes_stage_1", 10},
	{"potatoes_stage_2", 10},
	{"potatoes_stage_3", 10},
	{"carrots_stage_0", 8},
	{"carrots_stage_1", 8},
	{"carrots_stage_2", 8},
	{"carrots_stage_3", 8},
	{"sapling_1", 8},
	{"sapling_2", 8},
	{"sapling_3", 8},
	{"sapling_4", 8},
	{"sapling_5", 8},
	{"sapling_6", 8},
	{"mushroom_red", 10},
	{"mushroom_brown", 10},
	{"fern", 9},
	{"reeds", 0},
}) do
	if n[2] then
		minetest.register_node("nodes:" .. n[1], {
			description = n[1],
			drawtype = "plantlike",
			place_param2 = n[2],
			tiles = {n[1] .. ".png"},
			paramtype = "light",
			paramtype2 = "meshoptions",
			sunlight_propagates = true,
			walkable = false,
			buildable_to = true,
			floodable = true,
			selection_box = {
				type = "fixed",
				fixed = {-1/4, -1/2, -1/4, 1/4, 1/4, 1/4},
			},
			sounds = sounds.grass,
		})
	else
		minetest.register_node("nodes:" .. n[1], {
			description = n[1],
			drawtype = "plantlike",
			tiles = {n[1] .. ".png"},
			paramtype = "light",
			sunlight_propagates = true,
			walkable = false,
			buildable_to = true,
			floodable = true,
			selection_box = {
				type = "fixed",
				fixed = {-1/4, -1/2, -1/4, 1/4, 1/4, 1/4},
			},
			sounds = sounds.grass,
		})
	end
	frame.register("nodes:" .. n[1])
	minetest.register_node("nodes:flowerpot_" ..n[1], {
		description = "Pot with " .. n[1],
		drawtype = "mesh",
		mesh = "flowerpot.obj",
		tiles = {
			{name = "pot.png"},
			{name = n[1] .. ".png"},
		},
		paramtype = "light",
		sunlight_propagates = true,
		collision_box = {
			type = "fixed",
			fixed = {-1/4, -1/2, -1/4, 1/4, -1/8, 1/4},
		},
		selection_box = {
			type = "fixed",
			fixed = {-1/4, -1/2, -1/4, 1/4, 1/2, 1/4},
		},
		sounds = sounds.wood,
	})
end
-- empty flowerpot
minetest.register_node("nodes:flowerpot_empty", {
	description = "Pot (empty)",
	drawtype = "mesh",
	mesh = "flowerpot.obj",
	tiles = {
		{name = "pot.png"},
		{name = "itb_blank.png"},
	},
	paramtype = "light",
	sunlight_propagates = true,
	collision_box = {
		type = "fixed",
		fixed = {-1/4, -1/2, -1/4, 1/4, -1/8, 1/4},
	},
	selection_box = {
		type = "fixed",
		fixed = {-1/4, -1/2, -1/4, 1/4, 1/2, 1/4},
	},
	sounds = sounds.wood,
})


--   soil
for _, v in pairs({
	"soil",
	"soil_wet",
}) do
	-- register diggable node version
	minetest.register_node("nodes:" .. v .. "_breakable", {
		description = v .. " (breakable)",
		tiles = {{name = v .. ".png"}, {name = "dirt.png"}},
		groups = {node = 1, shovel = 1},
		sounds = sounds.dirt,
		on_place = on_place_breakable,
		after_dig_node = after_dig_node_breakable,
		node_placement_prediction = "",
	})
	minetest.register_node("nodes:" .. v, {
		description = v,
		tiles = {{name = v .. ".png"}, {name = "dirt.png"}},
		groups = {node = 1, unbreakable = 1},
		sounds = sounds.dirt,
	})
	frame.register("nodes:" .. v .. "_breakable")
end

-- dirt with grass,
minetest.register_node("nodes:dirt_with_grass_breakable", {
	description = "Dirt with grass (breakable)",
	tiles = {"grass.png", "dirt.png", "grass_side.png"},
	groups = {node = 1, shovel = 1},
	sounds = sounds.dirt,
	on_place = on_place_breakable,
	after_dig_node = after_dig_node_breakable,
	node_placement_prediction = "",
})
minetest.register_node("nodes:dirt_with_grass", {
	description = "Dirt with grass",
	tiles = {"grass.png", "dirt.png", "grass_side.png"},
	groups = {node = 1, unbreakable = 1},
	sounds = sounds.dirt,
})
frame.register("nodes:dirt_with_grass_breakable")

-- dirt with snow
minetest.register_node("nodes:dirt_with_snow_breakable", {
	description = "Dirt with snow (breakable)",
	tiles = {"snow.png", "dirt.png", "grass_side_snowed.png"},
	groups = {node = 1, shovel = 1},
	sounds = sounds.snow,
	on_place = on_place_breakable,
	after_dig_node = after_dig_node_breakable,
	node_placement_prediction = "",
})
minetest.register_node("nodes:dirt_with_snow", {
	description = "Dirt with snow",
	tiles = {"snow.png", "dirt.png", "grass_side_snowed.png"},
	groups = {node = 1, unbreakable = 1},
	sounds = sounds.snow,
})
frame.register("nodes:dirt_with_snow_breakable")