local modname = minetest.get_current_modname()
local S = minetest.get_translator(modname)
local modpath = minetest.get_modpath(modname)

mcl_structures = {}

dofile(modpath.."/api.lua")

mcl_structures.register_structure = function() return end

mcl_structures.register_structure("desert_well",{
	place_on = {"group:sand"},
	flags = "place_center_x, place_center_z",
	solid_ground = true,
	sidelen = 4,
	chunk_probability = 15,
	y_max = mcl_vars.mg_overworld_max,
	y_min = 1,
	y_offset = -2,
	biomes = { "Desert" },
	filenames = { modpath.."/schematics/mcl_structures_desert_well.mts" },
	after_place = function(pos,def,pr)
		local hl = def.sidelen / 2
		local p1 = vector.offset(pos,-hl,-hl,-hl)
		local p2 = vector.offset(pos,hl,hl,hl)
		if minetest.registered_nodes["mcl_sus_nodes:sand"] then
			local sus_poss = minetest.find_nodes_in_area(vector.offset(p1,0,-3,0), vector.offset(p2,0,-hl+2,0), {"mcl_core:sand","mcl_core:sandstone","mcl_core:redsand","mcl_core:redsandstone"})
			if #sus_poss > 0 then
				table.shuffle(sus_poss)
				for i = 1,pr:next(1,#sus_poss) do
					minetest.swap_node(sus_poss[i],{name="mcl_sus_nodes:sand"})
					local meta = minetest.get_meta(sus_poss[i])
					meta:set_string("structure","desert_well")
				end
			end
		end
	end,
	loot = {
		["SUS"] = {
		{
			stacks_min = 1,
			stacks_max = 1,
			items = {
				{ itemstring = "mcl_pottery_sherds:arms_up", weight = 2, },
				{ itemstring = "mcl_pottery_sherds:brewer", weight = 2, },
				{ itemstring = "mcl_core:brick", weight = 1 },
				{ itemstring = "mcl_core:gold_ingot", weight = 1 },
				{ itemstring = "mcl_core:stick", weight = 1 },
				{ itemstring = "mcl_sus_stew:stew", weight = 1 },

			}
		}},
	},
})


mcl_structures.register_structure("boulder",{
	filenames = {
		modpath.."/schematics/mcl_structures_boulder_small.mts",
		modpath.."/schematics/mcl_structures_boulder_small.mts",
		modpath.."/schematics/mcl_structures_boulder_small.mts",
		modpath.."/schematics/mcl_structures_boulder.mts",
		-- small boulder 3x as likely
	},
},true) --is spawned as a normal decoration. this is just for /spawnstruct

mcl_structures.register_structure("ice_spike_small",{
	filenames = { modpath.."/schematics/mcl_structures_ice_spike_small.mts"	},
},true) --is spawned as a normal decoration. this is just for /spawnstruct
mcl_structures.register_structure("ice_spike_large",{
	sidelen = 6,
	filenames = { modpath.."/schematics/mcl_structures_ice_spike_large.mts"	},
},true) --is spawned as a normal decoration. this is just for /spawnstruct

-- Debug command
local function dir_to_rotation(dir)
	local ax, az = math.abs(dir.x), math.abs(dir.z)
	if ax > az then
		if dir.x < 0 then
			return "270"
		end
		return "90"
	end
	if dir.z < 0 then
		return "180"
	end
	return "0"
end

minetest.register_chatcommand("spawnstruct", {
	params = "dungeon",
	description = S("Generate a pre-defined structure near your position."),
	privs = {debug = true},
	func = function(name, param)
		local player = minetest.get_player_by_name(name)
		if not player then return end
		local pos = player:get_pos()
		if not pos then return end
		pos = vector.round(pos)
		local dir = minetest.yaw_to_dir(player:get_look_horizontal())
		local rot = dir_to_rotation(dir)
		local pr = PseudoRandom(pos.x+pos.y+pos.z)
		local errord = false
		local message = S("Structure placed.")
		if param == "dungeon" and mcl_dungeons and mcl_dungeons.spawn_dungeon then
			mcl_dungeons.spawn_dungeon(pos, rot, pr)
		elseif param == "" then
			message = S("Error: No structure type given. Please use “/spawnstruct <type>”.")
			errord = true
		else
			for n,d in pairs(mcl_structures.registered_structures) do
				if n == param then
					mcl_structures.place_structure(pos,d,pr,math.random(),rot)
					return true,message
				end
			end
			message = S("Error: Unknown structure type. Please use “/spawnstruct <type>”.")
			errord = true
		end
		minetest.chat_send_player(name, message)
		if errord then
			minetest.chat_send_player(name, S("Use /help spawnstruct to see a list of available types."))
		end
	end
})
minetest.register_on_mods_loaded(function()
	local p = ""
	for n,_ in pairs(mcl_structures.registered_structures) do
		p = p .. " | "..n
	end
	minetest.registered_chatcommands["spawnstruct"].params = minetest.registered_chatcommands["spawnstruct"].params .. p
end)
