mcl_villages = {}
mcl_villages.modpath = minetest.get_modpath(minetest.get_current_modname())

local village_boost = tonumber(minetest.settings:get("vl_villages_boost")) or 1

dofile(mcl_villages.modpath.."/const.lua")
dofile(mcl_villages.modpath.."/utils.lua")
dofile(mcl_villages.modpath.."/buildings.lua")
dofile(mcl_villages.modpath.."/paths.lua")
dofile(mcl_villages.modpath.."/api.lua")

local S = minetest.get_translator(minetest.get_current_modname())

local function ecb_village(blockpos, action, calls_remaining, param)
	if calls_remaining >= 1 then return end
	if mcl_villages.village_exists(param.blockseed) then return end
	local pr = PcgRandom(param.blockseed)
	local vm = VoxelManip(param.minp, param.maxp)
	local settlement = mcl_villages.create_site_plan(vm, param.minp, param.maxp, pr)
	if not settlement then return false, false end
	-- all foundations first, then all buildings, to avoid damaging very close buildings
	mcl_villages.terraform(vm, settlement, pr)
	mcl_villages.place_schematics(vm, settlement, param.blockseed, pr)
	mcl_villages.add_village(param.blockseed, settlement)
	--lvm:write_to_map(true) -- destorys paths as of now, as they are placed afterwards
	for _, on_village_placed_callback in pairs(mcl_villages.on_village_placed) do
		on_village_placed_callback(settlement, param.blockseed)
	end
end

-- Disable natural generation in singlenode.
local mg_name = minetest.get_mapgen_setting("mg_name")
if mg_name ~= "singlenode" then
	mcl_mapgen_core.register_generator("villages", nil, function(minp, maxp, blockseed)
		if maxp.y < 0 then return end
		if village_boost == 0 then return end
		local pr = PcgRandom(blockseed)
		if pr:next(0,1e9) * 100e-9 >= village_boost then return end
		if village_boost < 25 then -- otherwise, this tends to transitively emerge too much
			minp, maxp = vector.offset(minp, -16, 0, -16), vector.offset(maxp, 16, 0, 16)
		end
		minetest.emerge_area(minp, maxp, ecb_village, { minp = minp, maxp = maxp, blockseed = blockseed })
	end)
end

-- Handle legacy structblocks that are not fully emerged yet.
minetest.register_node("mcl_villages:structblock", {drawtype="airlike",groups = {not_in_creative_inventory=1}})
minetest.register_lbm({
	name = "mcl_villages:structblock",
	run_at_every_load = true,
	nodenames = {"mcl_villages:structblock"},
	action = function(pos, node)
		minetest.set_node(pos, {name = "air"})
		local minp, maxp = vector.offset(pos, -40, -40, -40), vector.offset(pos, 40, 40, 40)
		local blockseed = PcgRandom(minetest.hash_node_position(pos)):next()
		minetest.emerge_area(minp, maxp, ecb_village, { minp = minp, maxp = maxp, blockseed = blockseed})
	end
})

-- manually place villages
if minetest.is_creative_enabled("") then
	minetest.register_craftitem("mcl_villages:tool", {
		description = S("mcl_villages build tool"),
		inventory_image = "default_tool_woodshovel.png",
		-- build settlement
		on_place = function(itemstack, placer, pointed_thing)
			if not pointed_thing.under then return end
			if not minetest.check_player_privs(placer, "server") then
				minetest.chat_send_player(placer:get_player_name(), S("Placement denied. You need the “server” privilege to place villages."))
				return
			end
			local pos = pointed_thing.under
			local minp, maxp = vector.offset(pos, -40, -40, -40), vector.offset(pos, 40, 40, 40)
			local blockseed = PcgRandom(minetest.hash_node_position(pos)):next()
			minetest.emerge_area(minp, maxp, ecb_village, { minp = minp, maxp = maxp, blockseed = blockseed })
		end
	})
	mcl_wip.register_experimental_item("mcl_villages:tool")
end

-- This makes the temporary node invisble unless in creative mode
local drawtype = minetest.is_creative_enabled("") and "glasslike" or "airlike"

-- Special node for schematics editing: no path on this place
minetest.register_node("mcl_villages:no_paths", {
	description = S("Prevent paths from being placed during villager generation. Replaced by air after village path generation"),
	paramtype = "light",
	drawtype = drawtype,
	inventory_image = "mcl_core_barrier.png",
	wield_image = "mcl_core_barrier.png",
	tiles = { "mcl_core_barrier.png" },
	is_ground_content = false,
	groups = { creative_breakable = 1, not_solid = 1, not_in_creative_inventory = 1 },
})

-- Special node for schematics editing: path endpoint
minetest.register_node("mcl_villages:path_endpoint", {
	description = S("Mark the node as a good place for paths to connect to"),
	is_ground_content = false,
	tiles = { "wool_white.png" },
	wield_image = "wool_white.png",
	wield_scale = { x = 1, y = 1, z = 0.5 },
	groups = { handy = 1, supported_node = 1, not_in_creative_inventory = 1 },
	sounds = mcl_sounds.node_sound_wool_defaults(),
	paramtype = "light",
	sunlight_propagates = true,
	drawtype = "nodebox",
	node_box = { type = "fixed", fixed = { { -0.5, -0.5, -0.5, 0.5, -0.45, 0.5 } } },
	_mcl_hardness = 0.1,
	_mcl_blast_resistance = 0.1,
})

local schem_path = mcl_villages.modpath .. "/schematics/"

mcl_villages.register_bell({ name = "belltower", mts = schem_path .. "new_villages/belltower.mts", yadjust = 1 })

mcl_villages.register_well({
	name = "well",
	mts = schem_path .. "new_villages/well.mts",
	yadjust = -1,
})

for i = 1, 6 do
	mcl_villages.register_lamp({
		name = "lamp",
		mts = schem_path .. "new_villages/lamp_" .. i .. ".mts",
		yadjust = 1,
		no_ground_turnip = true,
		no_clearance = true,
	})
end

mcl_villages.register_building({
	name = "house_big",
	mts = schem_path .. "new_villages/house_4_bed.mts",
	min_jobs = 6,
	max_jobs = 99,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "house_large",
	mts = schem_path .. "new_villages/house_3_bed.mts",
	min_jobs = 4,
	max_jobs = 99,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "house_medium",
	mts = schem_path .. "new_villages/house_2_bed.mts",
	min_jobs = 2,
	max_jobs = 99,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "house_chimney",
	mts = schem_path .. "haeuschen2.mts",
	min_jobs = 2,
	max_jobs = 99,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "house_small",
	mts = schem_path .. "new_villages/house_1_bed.mts",
	min_jobs = 1,
	max_jobs = 99,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "blacksmith",
	mts = schem_path .. "new_villages/blacksmith.mts",
	num_others = 8,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "butcher",
	mts = schem_path .. "new_villages/butcher.mts",
	num_others = 8,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "farm",
	mts = schem_path .. "new_villages/farm.mts",
	num_others = 3,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "fish_farm",
	mts = schem_path .. "new_villages/fishery.mts",
	num_others = 8,
	yadjust = -2,
})

mcl_villages.register_building({
	name = "fletcher_tiny",
	group = "g:fletcher",
	mts = schem_path .. "bogner.mts",
	num_others = 8,
	max_jobs = 6,
	yadjust = 0,
})

mcl_villages.register_building({
	name = "fletcher",
	group = "g:fletcher",
	mts = schem_path .. "new_villages/fletcher.mts",
	num_others = 8,
	min_jobs = 7,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "library",
	group = "g:library",
	mts = schem_path .. "new_villages/library.mts",
	min_jobs = 12,
	max_jobs = 99,
	num_others = 15,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "librarian",
	group = "g:library",
	mts = schem_path .. "schreiber.mts",
	min_jobs = 1,
	max_jobs = 11,
	yadjust = 0,
})

mcl_villages.register_building({
	name = "map_shop",
	mts = schem_path .. "new_villages/cartographer.mts",
	num_others = 15,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "mason",
	mts = schem_path .. "new_villages/mason.mts",
	num_others = 8,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "mill",
	mts = schem_path .. "new_villages/mill.mts",
	num_others = 8,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "tannery",
	mts = schem_path .. "new_villages/leather_worker.mts",
	num_others = 8,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "tool_smith",
	mts = schem_path .. "new_villages/toolsmith.mts",
	num_others = 8,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "weapon_smith",
	mts = schem_path .. "new_villages/weaponsmith.mts",
	num_others = 8,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "chapel",
	group = "g:church",
	mts = schem_path .. "new_villages/chapel.mts",
	num_others = 8,
	min_jobs = 1,
	max_jobs = 9,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "church_european",
	group = "g:church",
	mts = schem_path .. "kirche.mts",
	num_others = 20,
	min_jobs = 8,
	max_jobs = 99,
	yadjust = 0,
})

mcl_villages.register_building({
	name = "church",
	group = "g:church",
	mts = schem_path .. "new_villages/church.mts",
	num_others = 20,
	min_jobs = 8,
	max_jobs = 99,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "farm_small",
	mts = schem_path .. "new_villages/farm_small_1.mts",
	num_others = 3,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "farm_small2",
	mts = schem_path .. "new_villages/farm_small_2.mts",
	num_others = 3,
	yadjust = 1,
})

mcl_villages.register_building({
	name = "farm_large",
	mts = schem_path .. "new_villages/farm_large_1.mts",
	num_others = 6,
	yadjust = 1,
})

mcl_villages.register_crop({
	type = "grain",
	node = "mcl_farming:wheat_1",
	biomes = {
		acacia = 10,
		bamboo = 10,
		desert = 10,
		jungle = 10,
		plains = 10,
		savanna = 10,
		spruce = 10,
	},
})

mcl_villages.register_crop({
	type = "root",
	node = "mcl_farming:carrot_1",
	biomes = {
		acacia = 10,
		bamboo = 6,
		desert = 10,
		jungle = 6,
		plains = 6,
		spruce = 10,
	},
})

mcl_villages.register_crop({
	type = "root",
	node = "mcl_farming:potato_1",
	biomes = {
		acacia = 6,
		bamboo = 10,
		desert = 6,
		jungle = 10,
		plains = 10,
		spruce = 6,
	},
})

mcl_villages.register_crop({
	type = "root",
	node = "mcl_farming:beetroot_0",
	biomes = {
		acacia = 3,
		bamboo = 3,
		desert = 3,
		jungle = 3,
		plains = 3,
		spruce = 3,
	},
})

mcl_villages.register_crop({
	type = "gourd",
	node = "mcl_farming:melontige_1",
	biomes = {
		bamboo = 10,
		jungle = 10,
	},
})

mcl_villages.register_crop({
	type = "gourd",
	node = "mcl_farming:pumpkin_1",
	biomes = {
		acacia = 10,
		bamboo = 5,
		desert = 10,
		jungle = 5,
		plains = 10,
		spruce = 10,
	},
})

-- TODO: make flowers biome-specific
for name, def in pairs(minetest.registered_nodes) do
	if def.groups.flower and not def.groups.double_plant and name ~= "mcl_flowers:wither_rose" then
		mcl_villages.register_crop({
			type = "flower",
			node = name,
			biomes = {
				acacia = 10,
				bamboo = 6,
				desert = 10,
				jungle = 6,
				plains = 6,
				spruce = 10,
			},
		})
	end
end

-- Crop placeholder nodes at different growth stages, for designing schematics
for _, crop_type in ipairs(mcl_villages.get_crop_types()) do
	for count = 1, 8 do
		local tile = crop_type .. "_" .. count .. ".png"
		minetest.register_node("mcl_villages:crop_" .. crop_type .. "_" .. count, {
			description = S("A place to plant @1 crops", crop_type),
			is_ground_content = false,
			tiles = { tile },
			wield_image = tile,
			wield_scale = { x = 1, y = 1, z = 0.5 },
			groups = { handy = 1, supported_node = 1, not_in_creative_inventory = 1 },
			paramtype = "light",
			sunlight_propagates = true,
			drawtype = "nodebox",
			node_box = { type = "fixed", fixed = { { -0.5, -0.5, -0.5, 0.5, -0.45, 0.5 } } },
			_mcl_hardness = 0.1,
			_mcl_blast_resistance = 0.1,
		})
	end
end