NYANLAND_HEIGHT=30688
NYANCAT_PROP=1
NYANLAND_TREESIZE=2
local info = true

local nyanland={}

--Cloudstone
minetest.register_node("nyanland:cloudstone", {
	description = "nyanland:cloudstone",
	tile_images = {"nyanland_cloudstone.png"},
	inventory_image = minetest.inventorycube("nyanland_cloudstone.png"),
	use_texture_alpha = true,
	sunlight_propagates = true,
	dug_item = '',
	light_source = 10,
	groups = {dig_immediate = 3},
})

minetest.register_node("nyanland:cloudstone_var", {
	description = "nyanland:cloudstone_var",
	tile_images = {"nyanland_cloudstone_var.png", "nyanland_cloudstone_var.png", "nyanland_cloudstone.png"},
	inventory_image = minetest.inventorycube("nyanland_cloudstone_var.png"),
	use_texture_alpha = true,
	sunlight_propagates = true,
	drop = '',
	light_source = 10,
	groups = {dig_immediate = 3},
})


minetest.register_node("nyanland:mesetree", {
	description = "Mese Tree",
	tiles = {"nyanland_mesetree_top.png", "nyanland_mesetree_top.png", "nyanland_mesetree.png"},
	groups = {tree=1,cracky=1,level=2},
	sounds = default.node_sound_stone_defaults(),
})

minetest.register_node("nyanland:meseleaves", {
	description = "nyanland:meseleaves",
	drawtype = "allfaces_optional",
	visual_scale = 2,
	tile_images = {"nyanland_meseleaves.png"},
	inventory_image = minetest.inventorycube("nyanland_meseleaves.png"),
	paramtype = "light",
	furnace_burntime = 5,
	groups = {snappy=3, flammable=2},
--	groups = {snappy=3, leafdecay=3, flammable=2},
})

minetest.register_node("nyanland:mese_shrub", {
	description = "Mese Shrub",
	drawtype = "plantlike",
	tiles = {"nyanland_mese_shrub.png"},
	inventory_image = "nyanland_mese_shrub.png",
	wield_image = "nyanland_mese_shrub.png",
	paramtype = "light",
	walkable = false,
	buildable_to = true,
	groups = {snappy=3,flammable=3,attached_node=1},
	sounds = default.node_sound_leaves_defaults(),
	selection_box = {
		type = "fixed",
		fixed = {-0.5, -0.5, -0.5, 0.5, -5/16, 0.5},
	},
})

minetest.register_node("nyanland:mese_shrub_fruits", {
	description = "Mese Shrub with fruits",
	drawtype = "plantlike",
	tiles = {"nyanland_mese_shrub_fruits.png"},
	inventory_image = "nyanland_mese_shrub_fruits.png",
	wield_image = "nyanland_mese_shrub_fruits.png",
	paramtype = "light",
	walkable = false,
	buildable_to = true,
	groups = {snappy=3,flammable=3,attached_node=1},
	sounds = default.node_sound_leaves_defaults(),
	selection_box = {
		type = "fixed",
		fixed = {-0.5, -0.5, -0.5, 0.5, -5/16, 0.5},
	},
})

-- Clonestone
minetest.register_node("nyanland:clonestone", {
	description = "nyanland:clonestone",
	tile_images = {"nyanland_clonestone.png"},
	inventory_image = minetest.inventorycube("nyanland_clonestone.png"),
	furnace_burntime = 100,
	groups = {cracky = 1},
})

-- Clone items
minetest.register_abm({
	nodenames = {"nyanland:clonestone"},
	interval = 1,
	chance = 1,
	action = function(pos)
		local pos_under = {x=pos.x, y=pos.y-1, z=pos.z}
		local node_over = minetest.env:get_node({x=pos.x, y=pos.y+1, z=pos.z}).name
		if minetest.env:get_node(pos_under).name == "air"
		and node_over ~= "air"
		and node_over ~= "nyanland:clonestone" then
			minetest.env:add_node(pos_under, {name=node_over})
		end
--		nodeupdate(pos_under)
	end,
})

-- Healstone
minetest.register_node("nyanland:healstone", {
	description = "nyanland:healstone",
	tile_images = {"nyanland_healstone.png"},
	inventory_image = minetest.inventorycube("nyanland_healstone.png"),
	furnace_burntime = 100,
	groups = {cracky = 1},
})

minetest.register_abm(
	{nodenames = {"nyanland:healstone"},
	interval = 1.0,
	chance = 1,
	action = function(pos)
		local objs = minetest.env:get_objects_inside_radius(pos, 3)
		for k, obj in pairs(objs) do
			local hp = obj:get_hp()
			if hp >= 20 then return end
			obj:set_hp(hp+2)
		end
	end,
})


local c_cloudstone = minetest.get_content_id("nyanland:cloudstone")
local c_cloudstone2 = minetest.get_content_id("nyanland:cloudstone_var")
local c_clonestone = minetest.get_content_id("nyanland:clonestone")
local c_mese_shrub = minetest.get_content_id("nyanland:mese_shrub")
local c_mese_shrub_fruits = minetest.get_content_id("nyanland:mese_shrub_fruits")
local c_cloud = minetest.get_content_id("default:cloud")

local ypse = NYANLAND_HEIGHT

minetest.register_on_generated(function(minp, maxp, seed)
	if (minp.y >= ypse+10 or maxp.y <= ypse-10) then
		return
	end

	if info then
		t1 = os.clock()
		local geninfo = "[nyanland] generates: x=["..minp.x.."; "..maxp.x.."]; y=["..minp.y.."; "..maxp.y.."]; z=["..minp.z.."; "..maxp.z.."]"
		print(geninfo)
		minetest.chat_send_all(geninfo)
	end
	local pr = PseudoRandom(seed+112)
	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
	local data = vm:get_data()
	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}

	local perlin1 = minetest.get_perlin(13,3, 0.5, 500)	--Get map specific perlin
	local perlin2 = minetest.get_perlin(133,3, 0.5, 100)

	local num = 1
	local tab = {}

	for x=minp.x, maxp.x, 1 do
		for z=minp.z, maxp.z, 1 do
			local test = math.floor(perlin1:get2d({x=x, y=z})*3+0.5)
			local test2 = math.floor(perlin2:get2d({x=x, y=z})*1000+0.5)
			local p_addpos = area:index(x, ypse+test, z)
			local p_plantpos = area:index(x, ypse+test+1, z)
			local d_p_addpos = data[p_addpos]
			if pr:next(1, 1000) == 1 then
				tab[num] = {x=x, y=ypse+test, z=z}
				num = num+1
				data[p_addpos] = c_cloud
			elseif pr:next(1, 5000) == 1 then
				data[p_addpos] = c_clonestone
			elseif pr:next(1, 300) == 1 then
				data[p_addpos] = c_cloudstone2
			else
				data[p_addpos] = c_cloudstone
			end
			if pr:next(1, 1000) == 4 then
				if pr:next(1, 1000) == 2 then
					data[p_plantpos] = c_mese_shrub_fruits
				else
					data[p_plantpos] = c_mese_shrub
				end
			end
		end
	end

	vm:set_data(data)
	--vm:set_lighting({day=0, night=0})
	vm:calc_lighting()
	vm:update_liquids()
	vm:write_to_map()

	for _,v in ipairs(tab) do
		nyanland:grow_mesetree(v)
	end

	if math.random(NYANCAT_PROP)==1 then
		local nyan_headpos={}
		nyan_headpos={x=minp.x+pr:next(1, 80), y=ypse+pr:next(1, 20)+10, z=minp.z+pr:next(1, 80)}	
		nyanland:add_nyancat(nyan_headpos, minp)
	end
	if info then
		local geninfo = string.format("[nyanland] done after: %.2fs", os.clock() - t1)
		print(geninfo)
		minetest.chat_send_all(geninfo)
	end
end)

function nyanland:add_nyancat(nyan_headpos)
	local nyan_tailpos={}
	minetest.env:add_node(nyan_headpos, {name="default:nyancat"})
	local length=math.random(4,15)
	for z=nyan_headpos.z+1, nyan_headpos.z+length, 1 do
		nyan_tailpos={x=nyan_headpos.x, y=nyan_headpos.y, z=z}
		minetest.env:add_node(nyan_tailpos, {name="default:nyancat_rainbow"})
	end
end

local get_volume = function(pos1, pos2)
	return (pos2.x - pos1.x + 1) * (pos2.y - pos1.y + 1) * (pos2.z - pos1.z + 1)
end

function nyanland:grow_mesetree(pos)
	local t1 = os.clock()
	local manip = minetest.get_voxel_manip()
	local vwidth = NYANLAND_TREESIZE
	local vheight = 7+vwidth
	local emerged_pos1, emerged_pos2 = manip:read_from_map({x=pos.x-vwidth, y=pos.y, z=pos.z-vwidth},
		{x=pos.x+vwidth, y=pos.y+vheight, z=pos.z+vwidth})
	local area = VoxelArea:new({MinEdge=emerged_pos1, MaxEdge=emerged_pos2})

	local nodes = {}
	local ignore = minetest.get_content_id("ignore")
	for i = 1, get_volume(emerged_pos1, emerged_pos2) do
		nodes[i] = ignore
	end

	local c_tree = minetest.get_content_id("nyanland:mesetree")
	local c_hls = minetest.get_content_id("nyanland:healstone")
	local c_apple = minetest.get_content_id("default:apple")
	local c_leaves = minetest.get_content_id("nyanland:meseleaves")
	local c_air = minetest.get_content_id("air")

	--TRUNK
	pos.y=pos.y+1
	local pr = PseudoRandom(math.abs(pos.x+pos.y*3+pos.z*5))
	local trunkpos={x=pos.x, z=pos.z}
	local tran=math.random(2)
	for y=pos.y, pos.y+4+tran do
		trunkpos.y=y
		p_trunkpos=area:index(trunkpos.x, trunkpos.y, trunkpos.z)
		if math.random(200)>1 then
			nodes[p_trunkpos] = c_tree
		else
			nodes[p_trunkpos] = c_hls
		end
	end
	--LEAVES
	local leafpos={}
	for x=(trunkpos.x-NYANLAND_TREESIZE), (trunkpos.x+NYANLAND_TREESIZE), 1 do
		for y=(trunkpos.y-NYANLAND_TREESIZE), (trunkpos.y+NYANLAND_TREESIZE), 1 do
			for z=(trunkpos.z-NYANLAND_TREESIZE), (trunkpos.z+NYANLAND_TREESIZE), 1 do
				if (x-trunkpos.x)^2+(y-trunkpos.y)^2+(z-trunkpos.z)^2<= NYANLAND_TREESIZE^2 + NYANLAND_TREESIZE then	
					leafpos={x=x, y=y, z=z}
					p_leafpos=area:index(leafpos.x, leafpos.y, leafpos.z)
					if minetest.env:get_node(leafpos).name=="air"
					and nodes[p_leafpos]==ignore then
						if pr:next(1,5)==1 then
							if pr:next(1,2)==1 then
								nodes[p_leafpos] = c_apple
							end
						else
							nodes[p_leafpos] = c_leaves
						end
					end				
				end
			end
		end
	end
	manip:set_data(nodes)
	manip:write_to_map()
	if info then
		print(string.format("[nyanland] a mesetree grew at ("..pos.x.."|"..pos.y.."|"..pos.z..") in: %.2fms", (os.clock() - t1) * 1000))
	end
	manip:update_map()	--calc shadows
end

--MOVING NYAN CATS
minetest.register_abm(
	{nodenames = {"default:nyancat"},
	interval = 10,
	chance = 100,
	action = function(pos, node, active_object_count, active_object_count_wider)
		if pos.y>NYANLAND_HEIGHT then
			minetest.env:remove_node(pos)
			minetest.env:add_entity(pos, "nyanland:head_entity")
		end
	end,
})

minetest.register_entity("nyanland:head_entity", {
	physical = false,
	visual = "sprite",
	timer=0,
	textures = {"default_nc_side.png", "default_nc_side.png", "default_nc_side.png",
		"default_nc_side.png", "default_nc_back.png", "default_nc_front.png"},
	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
	visual = "cube",
	on_activate = function(self, staticdata)
		self.object:setvelocity({x=0, y=0, z=-2})
	end,

	on_punch = function(self, hitter)
		local mesepos=self.object:getpos()
		mesepos.y=mesepos.y-1
		minetest.env:add_entity(mesepos, "nyanland:mese")
	end,

	on_step = function(self, dtime)
		local pos = self.object:getpos()
		local pos = {x=math.floor(pos.x+0.5), y=math.floor(pos.y+0.5), z=math.floor(pos.z+0.5)}
		self.timer=self.timer+dtime
		if self.timer>=16 then	
			minetest.env:add_node(pos, {name="default:nyancat"})
			self.object:remove()
			return
		end
		if minetest.env:get_node(pos).name == "default:nyancat_rainbow" then	
			self.object:remove()
			return
		end
		for i = math.random(6)+18,30,1 do
			local p = {x=pos.x, y=pos.y, z=pos.z+i}
			if minetest.env:get_node(p).name == "default:nyancat_rainbow" then
				minetest.env:remove_node(p)
			end
		end
		for i = 1,5,1 do
			local p = {x=pos.x, y=pos.y, z=pos.z+i}
			if minetest.env:get_node(p).name == "air" then
				minetest.env:add_node(p, {name="default:nyancat_rainbow"})
			else
				return
			end
		end
	end
})

minetest.register_entity("nyanland:tail_entity", {
	physical = false,
	visual = "sprite",
	timer=0,
	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
	visual = "cube",
	on_step = function(self)
		self.object:remove()
	end
})

minetest.register_entity("nyanland:mese", {
	physical = true,
	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
	visual = "cube",
	textures = {"default_mese_block.png", "default_mese_block.png", "default_mese_block.png", "default_mese_block.png", "default_mese_block.png", "default_mese_block.png"},
	on_activate = function(self)
		self.object:setvelocity({x=0, y=-.1, z =0})
	end,
	on_step = function(self, dtime)
		self.object:setacceleration({x=0, y=-10, z=0})
		local pos = self.object:getpos()
		local bcp = {x=pos.x, y=pos.y-0.7, z=pos.z} 
		local bcn = minetest.env:get_node(bcp)
		--if bcn.name ~= "air" then
		--	local np = {x=bcp.x, y=bcp.y+1, z=bcp.z}
		if self.object:getvelocity().y == 0 then
			minetest.env:add_node(self.object:getpos(), {name="default:mese_block"})
			self.object:remove()
		end
		--	
		--end
	end
})