local mod_mcl_core = minetest.get_modpath("mcl_core")

-- Extreme Hills M aka Windswept Gravelly Hills
-- Just gravel.
vl_biomes.register_biome({
	name = "ExtremeHillsM",
	node_top = "mcl_core:gravel",
	depth_top = 1,
	node_filler = "mcl_core:gravel",
	depth_filler = 3,
	node_riverbed = "mcl_core:gravel",
	depth_riverbed = 3,
	y_min = 1,
	y_max = vl_biomes.overworld_max,
	humidity_point = 0,
	heat_point = 25,
	_mcl_biome_type = "cold",
	_mcl_water_temp = "cold",
	_mcl_grass_palette_index = 7,
	_mcl_foliage_palette_index = 11,
	_mcl_water_palette_index = 4,
	_mcl_skycolor = "#7DA2FF",
	_ocean = {
		node_riverbed = "mcl_core:sand",
		depth_riverbed = 3,
	},
})

-- Small dirt patches in Extreme Hills M
minetest.register_ore({
	ore_type = "blob",
	-- TODO: Should be grass block. But generating this as ore means gras blocks will spawn undeground. :-(
	ore = "mcl_core:dirt",
	wherein = {"mcl_core:gravel"},
	clust_scarcity = 5000,
	clust_num_ores = 12,
	clust_size = 4,
	y_min = vl_biomes.overworld_min,
	y_max = vl_biomes.overworld_max,
	noise_threshold = 0.2,
	noise_params = {offset = 0, scale = 5, spread = vector.new(250, 250, 250), seed = 64, octaves = 3, persist = 0.60},
	biomes = {"ExtremeHillsM"},
})

-- Large oaks
for i = 1, 4 do
	mcl_mapgen_core.register_decoration({
		deco_type = "schematic",
		place_on = {"group:grass_block", "mcl_core:dirt", },
		sidelen = 80,
		noise_params = {
			offset = -0.0007,
			scale = 0.001,
			spread = vector.new(250, 250, 250),
			seed = 3,
			octaves = 3,
			persist = 0.6
		},
		biomes = {"ExtremeHillsM"},
		y_min = 1,
		y_max = vl_biomes.overworld_max,
		schematic = mod_mcl_core .. "/schematics/mcl_core_oak_large_" .. i .. ".mts",
		flags = "place_center_x, place_center_z",
		rotation = "random",
		_mcl_foliage_palette_index = 11,
	})
end
-- Small “classic” oak (many biomes)
mcl_mapgen_core.register_decoration({
	deco_type = "schematic",
	place_on = {"group:grass_block", "mcl_core:dirt", },
	sidelen = 16,
	noise_params = {
		offset = 0.0,
		scale = 0.002,
		spread = vector.new(250, 250, 250),
		seed = 2,
		octaves = 3,
		persist = 0.7
	},
	biomes = {"ExtremeHillsM"},
	y_min = 1,
	y_max = vl_biomes.overworld_max,
	schematic = mod_mcl_core .. "/schematics/mcl_core_oak_classic.mts",
	flags = "place_center_x, place_center_z",
	rotation = "random",
	_mcl_foliage_palette_index = 11,
})

-- Spruce
vl_biomes.register_spruce_decoration(11000, 0.000025, "mcl_core_spruce_5.mts", {"ExtremeHillsM"})
vl_biomes.register_spruce_decoration(2500, 0.00005, "mcl_core_spruce_1.mts", {"ExtremeHillsM"})
vl_biomes.register_spruce_decoration(7000, 0.00005, "mcl_core_spruce_3.mts", {"ExtremeHillsM"})
vl_biomes.register_spruce_decoration(9000, 0.00005, "mcl_core_spruce_4.mts", {"ExtremeHillsM"})