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


h2omes = {}
h2omes.homes = {} -- table players home
h2omes.path = minetest.get_worldpath() .. "/h2omes/"
minetest.mkdir(h2omes.path)

h2omes.time_home = tonumber(minetest.settings:get("h2omes.time_home")) or 2 * 60
h2omes.time_spawn = tonumber(minetest.settings:get("h2omes.time_spawn")) or 5 * 60
h2omes.time_from_player = tonumber(minetest.settings:get("h2omes.time_from_player")) or 5 * 60
h2omes.time_to_player = tonumber(minetest.settings:get("h2omes.time_to_player")) or 5 * 60



local tmp_players = {}
local from_players = {}

h2omes.have_hell = false -- hell mod
if (minetest.get_modpath("hell") ~= nil) then
	h2omes.have_hell = true
	h2omes.hell_ceiling = hell.DEPTH
	h2omes.hell_floor = hell.DEPTH - 510
end

h2omes.have_nether = false -- nether mod
if (minetest.get_modpath("nether") ~= nil) then
	h2omes.have_nether = true
	h2omes.nether_ceiling = nether.DEPTH_CEILING
	h2omes.nether_floor = nether.DEPTH_FLOOR
end

function h2omes.check(name)
	if h2omes.homes[name] == nil then
		h2omes.homes[name] = {["home"] = {}, ["pit"] = {}}
	end
end


--function save_homes
function h2omes.save_homes(name)
	local file = h2omes.path..name
	local input, err = io.open(file, "w")
	if input then
		input:write(minetest.serialize(h2omes.homes[name]))
		input:close()
	else
		minetest.log("error", "open(" .. file .. ", 'w') failed: " .. err)
	end
end


--function load_homes
function h2omes.load_homes(name)
	h2omes.check(name)
	local file = h2omes.path..name
	local input, err = io.open(file, "r")
	if input then
		local data = minetest.deserialize(input:read())
		io.close(input)
		if data and type(data) == "table" then
			if data.home then
				if data.home.real then
					h2omes.homes[name].home.real = data.home.real
				end
				if data.home.nether then
					h2omes.homes[name].home.nether = data.home.nether
				end
				if data.home.hell then
					h2omes.homes[name].home.hell = data.home.hell
				end				
			end
			if data.pit then
				if data.pit.real  then
					h2omes.homes[name].pit.real = data.pit.real
				end
				if data.pit.nether then
					h2omes.homes[name].pit.nether = data.pit.nether
				end
				if data.pit.hell then
					h2omes.homes[name].pit.hell = data.pit.hell
				end
			end
		end
	end
end


local function is_inside(pos, pos_min, pos_max)
	if pos < pos_min and pos > pos_max then
		return true
	end
	return false
end


-- disallowed tp real-->nether or nether-->real
function h2omes.can_teleport(from_pos, to_pos)
	if not h2omes.have_nether and not h2omes.have_hell then -- not nether/hell mod
		return true
	end
	
	if h2omes.have_nether then
		if is_inside(from_pos.y, h2omes.nether_ceiling, h2omes.nether_floor) and not is_inside(to_pos.y, h2omes.nether_ceiling, h2omes.nether_floor) then
			return false
		elseif is_inside(to_pos.y, h2omes.nether_ceiling, h2omes.nether_floor) and not is_inside(from_pos.y, h2omes.nether_ceiling, h2omes.nether_floor) then
			return false
		end
	end
	
	if h2omes.have_hell then
		if is_inside(from_pos.y, h2omes.hell_ceiling, h2omes.hell_floor) and not is_inside(to_pos.y, h2omes.hell_ceiling, h2omes.hell_floor) then
			return false
		elseif is_inside(to_pos.y, h2omes.hell_ceiling, h2omes.hell_floor) and not is_inside(from_pos.y, h2omes.hell_ceiling, h2omes.hell_floor) then
			return false
		end
	end
	return true
end


--function set_homes
function h2omes.set_home(name, home_type)
	h2omes.check(name)
	local player = minetest.get_player_by_name(name)
	if not player then return false end
	
	local pos = player:get_pos()
	if not pos then return false end
	
	if h2omes.have_nether and is_inside(pos.y, h2omes.nether_ceiling, h2omes.nether_floor) then
		h2omes.homes[name][home_type].nether = pos
	elseif h2omes.have_hell and is_inside(pos.y, h2omes.hell_ceiling, h2omes.hell_floor) then
		h2omes.homes[name][home_type].hell = pos
	else
		h2omes.homes[name][home_type].real = pos
	end
	
	if home_type == "home" then
		minetest.chat_send_player(name, S("Home set!"))
	else
		minetest.chat_send_player(name, S("Pit set!"))
	end
	minetest.sound_play("dingdong", {to_player = name, gain = 1.0})
	h2omes.save_homes(name)
	return true
end


--function get_homes
function h2omes.get_home(name, home_type)
	h2omes.check(name)
	local player = minetest.get_player_by_name(name)
	if not player then return nil end
	local pos = player:get_pos()
	if not pos then return nil end
	local status = "real"
	
	if h2omes.have_nether and is_inside(pos.y, h2omes.nether_ceiling, h2omes.nether_floor) then
		status = "nether"
	elseif h2omes.have_hell and is_inside(pos.y, h2omes.hell_ceiling, h2omes.hell_floor) then
		status = "hell"
	end	
	
	if h2omes.homes[name][home_type][status] then
		return h2omes.homes[name][home_type][status]
	end
	return nil
end

--function getspawn
function h2omes.getspawn(name)
	local player = minetest.get_player_by_name(name)
	if not player then return nil end
	local pos = player:get_pos()
	if not pos then return nil end
	local spawn_pos
	if h2omes.have_nether and is_inside(pos.y, h2omes.nether_ceiling, h2omes.nether_floor) then
		spawn_pos = minetest.string_to_pos(minetest.settings:get("nether_static_spawnpoint") or "")
		if spawn_pos and not is_inside(spawn_pos.y, h2omes.nether_ceiling, h2omes.nether_floor) then
			minetest.log("error","[h2omes] nether_static_spawnpoint is not in nether, fix in minetest.conf.")
			return nil
		end
	elseif h2omes.have_hell and is_inside(pos.y, h2omes.hell_ceiling, h2omes.hell_floor) then
		spawn_pos = minetest.string_to_pos(minetest.settings:get("hell_static_spawnpoint") or "")
		if spawn_pos and not is_inside(spawn_pos.y, h2omes.hell_ceiling, h2omes.hell_floor) then
			minetest.log("error","[h2omes] hell_static_spawnpoint is not in hell, fix in minetest.conf.")
			return nil
		end		
	else
		spawn_pos = minetest.string_to_pos(minetest.settings:get("static_spawnpoint") or "")
	end
	return spawn_pos
end


--function to_spawn
function h2omes.to_spawn(name)
	local player = minetest.get_player_by_name(name)
	if not player then return false end
	local spawn_pos = h2omes.getspawn(name)
	if spawn_pos then
		minetest.chat_send_player(name, S("Teleporting to spawn..."))
		player:set_pos(spawn_pos)
		minetest.sound_play("teleport", {to_player = name, gain = 1.0})
		minetest.log("action", "Player ".. name .." respawned. Next allowed respawn in ".. h2omes.time_spawn .." seconds.")
		return true
	else
		minetest.chat_send_player(name, S("ERROR: No spawn point is set on this server!"))
		return false
	end
end


--function to_homes
function h2omes.to_home(name, home_type)
	h2omes.check(name)
	local player = minetest.get_player_by_name(name)
	if not player then return false end
	local pos = player:get_pos()
	if not pos then return false end
	local status = "real"
	
	if h2omes.have_nether and is_inside(pos.y, h2omes.nether_ceiling, h2omes.nether_floor) then
		status = "nether"
	elseif h2omes.have_hell and is_inside(pos.y, h2omes.hell_ceiling, h2omes.hell_floor) then
		status = "hell"
	end
	if h2omes.homes[name][home_type][status] then
		player:set_pos(h2omes.homes[name][home_type][status])
		minetest.chat_send_player(name, S("Teleported to @1!", home_type))
		minetest.sound_play("teleport", {to_player=name, gain = 1.0})
		return true
	end
	return false
end


--function to_player
function h2omes.to_player(name, to_pos, to_name)
	local player = minetest.get_player_by_name(name)
	if not player then return false end
	local from_pos = player:get_pos()
	if to_pos then
		if h2omes.can_teleport(from_pos, to_pos) then
			minetest.chat_send_player(name, S("Teleporting to player @1", to_name))
			player:set_pos(to_pos)
			minetest.sound_play("teleport", {to_player=name, gain = 1.0})
			return true
		else
			minetest.chat_send_player(name, S("Sorry, teleport between 2 worlds is not allowed!"))
			return false
		end
	else
		minetest.chat_send_player(name, S("ERROR: No position to player!"))
		return false
	end
end


function h2omes.update_pos(name, pos, from_name)
	from_players[name] = {name = from_name, pos = pos}
	minetest.chat_send_player(name, S("@1 sent you their position to teleport.", from_name))
	minetest.sound_play("dingdong", {to_player = name, gain = 0.8})
	return true
end


function h2omes.send_pos_to_player(name, pos, to_name)
	local player = minetest.get_player_by_name(to_name)
	if not player or not pos then return false end
	if action_timers.wrapper(name, "send_pos_to_player", "from_player_" .. to_name, h2omes.time_from_player, h2omes.update_pos, {to_name, pos, name}) then
		minetest.chat_send_player(name, S("Your position has been sent to @1.", to_name))
		return true
	else
		minetest.chat_send_player(name, "Error: "..to_name.." already received a request. please try again later.")
	end
	return false
end


function h2omes.show_formspec_home(name)
	if tmp_players[name] == nil then
		tmp_players[name] = {}
	end
	local player = minetest.get_player_by_name(name)
	if not player then return false end
	local formspec = {"size[8,9]label[3,0;".. S("Home Settings") .."]"}
	local pos = player:get_pos()
	--spawn
	table.insert(formspec, "label[3.35,0.8;".. S("TO SPAWN") .."]")
	local spawn_pos = h2omes.getspawn(name)
	if spawn_pos then
		table.insert(formspec, string.format("label[2.9,1.3;x:%s, y:%s, z:%s]", math.floor(spawn_pos.x), math.floor(spawn_pos.y), math.floor(spawn_pos.z) ))
		table.insert(formspec, "button_exit[6,1.1;2,1;to_spawn;".. S("To Spawn") .."]")
	else
		table.insert(formspec, "label[2.9,1.3;".. S("No spawn set") .."]")
	end

	--home
	table.insert(formspec, "label[3.5,2.1;".. S("TO HOME") .."]")
	table.insert(formspec, "button[0,2.4;2,1;set_home;".. S("Set Home") .."]")
	local home_pos = h2omes.get_home(name, "home")
	if home_pos then
		table.insert(formspec, string.format("label[2.9,2.5;x:%s, y:%s, z:%s]", math.floor(home_pos.x), math.floor(home_pos.y), math.floor(home_pos.z) ))
		table.insert(formspec, "button_exit[6,2.4;2,1;to_home;".. S("To Home") .."]")
	else
		table.insert(formspec, "label[2.9,2.5;".. S("Home no set") .."]")
	end

	--pit
	table.insert(formspec, "label[3.55,3.4;".. S("TO PIT") .."]")
	table.insert(formspec, "button[0,3.7;2,1;set_pit;".. S("Set Pit") .."]")
	local pit_pos = h2omes.get_home(name, "pit")
	if pit_pos then
		table.insert(formspec, string.format("label[2.9,3.8;x:%s, y:%s, z:%s]", math.floor(pit_pos.x), math.floor(pit_pos.y), math.floor(pit_pos.z) ))
		table.insert(formspec, "button_exit[6,3.7;2,1;to_pit;".. S("To Pit") .."]")
	else
		table.insert(formspec, "label[2.9,3.8;".. S("Pit no set") .."]")
	end

	--to player
	table.insert(formspec, "label[3.35,4.7;".. S("TO PLAYER") .."]")
	local to_player = from_players[name]
	if to_player and to_player.name and to_player.pos then
		table.insert(formspec, "label[0,5.1;".. S("To @1", to_player.name) .."]")
		table.insert(formspec,string.format("label[2.9,5.1;x:%s, y:%s, z:%s]", math.floor(to_player.pos.x),math.floor(to_player.pos.y),math.floor(to_player.pos.z)))
		table.insert(formspec, "button_exit[6,5;2,1;to_player;".. S("To Player") .."]")
	else
		table.insert(formspec, "label[2.7,5.1;".. S("No request from player") .."]")
	end

	table.insert(formspec, "label[2,6;".. S("SEND MY POS TO PLAYER") .."]")
	if not tmp_players[name] or not tmp_players[name].players_list or #tmp_players[name].players_list < 1 or tmp_players[name].refresh then
		tmp_players[name].refresh = nil
		tmp_players[name].players_list = {}
		tmp_players[name].selected_id = 0
		for _,player in pairs(minetest.get_connected_players()) do
			local player_name = player:get_player_name()
			if player_name and player_name ~= "" and player_name ~= name then
				table.insert(tmp_players[name].players_list, player_name)
			end
		end
		tmp_players[name]["select_player"] = nil
	end
	if #tmp_players[name].players_list == 0 then
		table.insert(formspec, "label[2.5,6.4;".. S("No player, try later") .."]")
	else
		table.insert(formspec,"button[3,6.4;2,1;refresh;".. S("Refresh") .."]")
		table.insert(formspec, "dropdown[0,6.5;3,1;select_player;"..table.concat(tmp_players[name].players_list, ",")..";"..tmp_players[name].selected_id.."]")
	end
	if tmp_players[name].selected_id and tmp_players[name].selected_id > 0 then
		table.insert(formspec, "button_exit[6,6.4;2,1;send_to;".. S("Send To") .."]")
	end

	table.insert(formspec, "button_exit[3.25,8.3;2,1;close;".. S("Close") .."]")
	minetest.show_formspec(name, "h2omes:formspec", table.concat(formspec))
end


minetest.register_on_player_receive_fields(function(player, formname, fields)
	local name = player:get_player_name()
	if not name or name == "" then return end
	if formname == "h2omes:formspec" then
		if fields["set_home"] then
			--h2omes.set_home(name, "home")
			action_timers.wrapper(name, "sethome", "sethome_" .. name, h2omes.time_home, h2omes.set_home, {name, "home"})
		elseif fields["set_pit"] then
			--h2omes.set_home(name, "pit")
			action_timers.wrapper(name, "setpit", "sethome_" .. name, h2omes.time_home, h2omes.set_home, {name, "pit"})
		elseif fields["to_home"] then
			--h2omes.to_home(name, "home")
			action_timers.wrapper(name, "home", "tohome_" .. name, h2omes.time_home, h2omes.to_home, {name, "home"})
		elseif fields["to_pit"] then
			--h2omes.to_home(name, "pit")
			action_timers.wrapper(name, "pit", "tohome_" .. name, h2omes.time_home, h2omes.to_home, {name, "pit"})
		elseif fields["to_spawn"] then
			action_timers.wrapper(name, "spawn", "tospawn_" .. name, h2omes.time_spawn, h2omes.to_spawn, {name})
		elseif fields["to_player"] then
			if not from_players[name] then return end
			local to_name = from_players[name].name
			local pos = from_players[name].pos
			from_players[name] = nil
			if not to_name or not pos then return end
			h2omes.to_player(name, pos, to_name)
		elseif fields["send_to"] then
			local to_name = tmp_players[name]["select_player"]
			if not to_name then return end
			local pos = player:get_pos()
			action_timers.wrapper(name, "send_pos_to_player", "to_player_" .. name, h2omes.time_to_player, h2omes.send_pos_to_player, {name, pos, to_name})
			tmp_players[name] = nil
		elseif fields["refresh"] then
			tmp_players[name].refresh = true
		elseif fields["select_player"] then
			for i, n in pairs(tmp_players[name].players_list) do
				if n == fields["select_player"] then
					tmp_players[name]["select_player"] = fields["select_player"]
					tmp_players[name].selected_id = i
					break
				end
			end
		end
		if not fields["quit"] then
			h2omes.show_formspec_home(name)
		end
	end
end)


minetest.register_on_joinplayer(function(player)
	local name = player:get_player_name()
	if not name or name == "" then return end
	h2omes.load_homes(name)
end)


minetest.register_on_leaveplayer(function(player)
	local name = player:get_player_name()
	if not name or name == "" then return end
	h2omes.homes[name] = nil
	tmp_players[name] = nil
	from_players[name] = nil
end)


minetest.register_privilege("home", S("Can use /sethome, /home, /setpit and /pit"))

minetest.register_chatcommand("spawn", {
	description = S("Teleport a player to the defined spawnpoint"),
	func = function(name)
		local spawn_pos = h2omes.getspawn(name)
		if spawn_pos then
			action_timers.wrapper(name, "spawn", "tospawn_" .. name, h2omes.time_spawn, h2omes.to_spawn, {name})
		else
			minetest.chat_send_player(name, S("ERROR: No spawn point is set on this server!"))
			return false
		end
	end
})

minetest.register_chatcommand("home", {
	description = S("Teleport you to your home point"),
	privs = {home = true},
	func = function (name, params)
		if not h2omes.get_home(name, "home") then
			minetest.chat_send_player(name, S("Set a home using /sethome"))
			return false
		end
		--h2omes.to_home(name, "home")
		return action_timers.wrapper(name, "home", "tohome_" .. name, h2omes.time_home, h2omes.to_home, {name, "home"})
	end,
})


minetest.register_chatcommand("sethome", {
	description = S("Set your home point"),
	privs = {home = true},
	func = function (name, params)
		--h2omes.set_home(name, "home")
		return action_timers.wrapper(name, "sethome", "sethome_" .. name, h2omes.time_home, h2omes.set_home, {name, "home"})
	end,
})


minetest.register_chatcommand("pit", {
	description = S("Teleport you to your pit point"),
	privs = {home = true},
	func = function (name, params)
		if not h2omes.get_home(name, "pit") then
			minetest.chat_send_player(name, S("Set a pit using /setpit"))
			return false
		end
		--h2omes.to_home(name, "pit")
		return action_timers.wrapper(name, "pit", "tohome_" .. name, h2omes.time_home, h2omes.to_home, {name, "pit"})
	end,
})


minetest.register_chatcommand("setpit", {
	description = S("Set your pit point"),
	privs = {home = true},
	func = function (name, params)
		--h2omes.set_home(name, "pit")
		return action_timers.wrapper(name, "setpit", "sethome_" .. name, h2omes.time_home, h2omes.set_home, {name, "pit"})
	end,
})

minetest.register_chatcommand("homegui", {
	description = S("Show home menu"),
	privs = {home = true},
	func = function (name, params)
		h2omes.show_formspec_home(name)
	end,
})

if (minetest.get_modpath("unified_inventory")) then
	unified_inventory.register_button("home_formspec", {
		type = "image",
		image = "h2omes_home.png",
		tooltip = S("My Home"),
		show_with = "home",
		action = function(player)
			local name = player:get_player_name()
			if not name then return end
			h2omes.show_formspec_home(name)
		end,
	})
end

minetest.log("action","[h2omes] Loaded.")