local c_water = minetest.get_content_id("default:water_source")
local c_air = minetest.get_content_id("air")
local c_stone = minetest.get_content_id("default:stone")
local c_dirt = minetest.get_content_id("default:dirt")
local c_sand = minetest.get_content_id("default:sand")


local c_sweet_pod = minetest.get_content_id("dfcaverns:sweet_pod_6") -- param2 = 0
local c_quarry_bush = minetest.get_content_id("dfcaverns:quarry_bush_5") -- param2 = 4
local c_plump_helmet = minetest.get_content_id("dfcaverns:plump_helmet_4") -- param2 = 0-3
local c_pig_tail = minetest.get_content_id("dfcaverns:pig_tail_8") -- param2 = 3
local c_dimple_cup = minetest.get_content_id("dfcaverns_dimple_cup_4") -- param2 = 0
local c_cave_wheat = minetest.get_content_id("dfcaverns:cave_wheat_8") -- param2 = 3
local c_dead_fungus = minetest.get_content_id("dfcaverns:dead_fungus") -- param2 = 0
local c_cavern_fungi = minetest.get_content_id("dfcaverns:cavern_fungi") -- param2 = 0


local c_dirt_moss = minetest.get_content_id("dfcaverns:dirt_with_cave_moss")
local c_dirt = minetest.get_content_id("default:dirt")
local c_cobble = minetest.get_content_id("default:cobble")
local c_cobble_fungus = minetest.get_content_id("dfcaverns:cobble_with_floor_fungus")

--dfcaverns.spawn_tunnel_tube_vm(vi, area, data, param2_data)
--dfcaverns.spawn_tower_cap_vm(vi, area, data)
--dfcaverns.spawn_spore_tree_vm(vi, data, area)
--dfcaverns.spawn_nether_cap_vm(vi, area, data)
--dfcaverns.spawn_goblin_cap_vm(vi, area, data)
--dfcaverns.spawn_fungiwood_vm(vi, area, data)
--dfcaverns.spawn_blood_thorn_vm(vi, area, data, data_param2)

-----------------------------------------------------------------------------------------------------------
-- Coal Dust

local test_biome_floor = function(area, data, ai, vi, bi, param2_data)
	if data[bi] ~= c_stone then
		return
	end
	
	if math.random() < 0.25 then
		data[bi] = c_dirt
	else
		data[bi] = c_dirt_moss
	end
	
	local drip_rand = subterrane:vertically_consistent_random(vi, area)
	
	if math.random() < 0.1 then
		--data[vi] = c_plump_helmet
		--param2_data[vi] = math.random(0,3)
		data[vi] = c_cavern_fungi
	elseif drip_rand < 0.1 then
		--subterrane:stalagmite(bi, area, data, 6, 15, c_stone, c_stone, c_stone)
		local param2 = drip_rand*1000000 - math.floor(drip_rand*1000000/4)*4
		local height = math.floor(drip_rand/0.1 * 5)		
		subterrane:small_stalagmite(vi, area, data, param2_data, param2, height)
	elseif math.random() < 0.002 then
		dfcaverns.spawn_tower_cap_vm(bi, area, data)
	end
end

local test_biome_cave_floor = function(area, data, ai, vi, bi, param2_data)
	if data[bi] == c_dirt or data[bi] == c_sand then
		data[bi] = c_dirt_moss
		if math.random() < 0.5 then
			if data[vi] == c_air then
				data[vi] = c_cavern_fungi
			end
		end
		return
	end
	if data[bi] ~= c_stone then
		return
	end
	
	local drip_rand = subterrane:vertically_consistent_random(vi, area)
	if drip_rand < 0.075 then
		local param2 = drip_rand*1000000 - math.floor(drip_rand*1000000/4)*4
		local height = math.floor(drip_rand/0.075 * 4)
		subterrane:small_stalagmite(vi, area, data, param2_data, param2, height)
	end	
end

local test_biome_cave_ceiling = function(area, data, ai, vi, bi, param2_data)
	if data[ai] ~= c_stone then
		return
	end
	
	local drip_rand = subterrane:vertically_consistent_random(vi, area)

	if drip_rand < 0.1 then
		local param2 = drip_rand*1000000 - math.floor(drip_rand*1000000/4)*4
		local height = math.floor(drip_rand/0.1 * 5)		
		subterrane:small_stalagmite(vi, area, data, param2_data, param2, -height)
	end	
end

local test_biome_ceiling = function(area, data, ai, vi, bi, param2_data)
	if data[ai] ~= c_stone then
		return
	end

	local drip_rand = subterrane:vertically_consistent_random(vi, area)
	if drip_rand < 0.075 then
		--subterrane:stalactite(ai, area, data, 6, 20, c_stone, c_stone, c_stone)
		local param2 = drip_rand*1000000 - math.floor(drip_rand*1000000/4)*4
		local height = math.floor(drip_rand/0.075 * 5)
		subterrane:small_stalagmite(vi, area, data, param2_data, param2, -height)
	elseif math.random() < 0.03 then
		dfcaverns.glow_worm_ceiling(area, data, ai, vi, bi)
	end
end

-------------------------------------------------------------------------------------------

minetest.register_biome({
	name = "dfcaverns_test_biome",
	y_min = -2000,
	y_max = -300,
	heat_point = 50,
	humidity_point = 50,
	_subterrane_ceiling_decor = test_biome_ceiling,
	_subterrane_floor_decor = test_biome_floor,
	_subterrane_fill_node = c_air,
	_subterrane_cave_floor_decor = test_biome_cave_floor,
	_subterrane_cave_ceiling_decor = test_biome_cave_ceiling,
})