Module.lua

-- TE4 - T-Engine 4
-- Copyright (C) 2009 - 2018 Nicolas Casalini
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
--
-- Nicolas Casalini "DarkGod"
-- darkgod@te4.org

require "engine.class"
local I18N = require "engine.I18N"
local Savefile = require "engine.Savefile"
local UIBase = require "engine.ui.Base"
local FontPackage = require "engine.FontPackage"
require "engine.PlayerProfile"

--- Handles dialog windows
-- @classmod engine.Module
module(..., package.seeall, class.make)

--- Create a version string for the module version
-- Static
function _M:versionString(mod)
	return ("%s-%d.%d.%d"):format(mod.short_name, mod.version[1], mod.version[2], mod.version[3])
end

--- List all available modules
-- Static
function _M:listModules(incompatible, moddir_filter)
	local ms = {}
	local allmounts = fs.getSearchPath(true)
	fs.mount(engine.homepath, "/")

	local knowns = {}
	for i, short_name in ipairs(fs.list("/modules/")) do
		if not moddir_filter or moddir_filter(short_name) then
			local mod = self:createModule(short_name, incompatible)
			if mod then
				if not knowns[mod.short_name] then
					table.insert(ms, {short_name=mod.short_name, name=mod.name, versions={}})
					knowns[mod.short_name] = ms[#ms]
				end
				local v = knowns[mod.short_name].versions
				v[#v+1] = mod
			end
		end
	end

	table.sort(ms, function(a, b)
		if a.short_name == "tome" then return 1
		elseif b.short_name == "tome" then return nil
		else return a.name < b.name
		end
	end)

	for i, m in ipairs(ms) do
		table.sort(m.versions, function(b, a)
			return a.version[1] * 1000000 + a.version[2] * 1000 + a.version[3] * 1 < b.version[1] * 1000000 + b.version[2] * 1000 + b.version[3] * 1
		end)
		print("* Module: "..m.short_name)
		for i, mod in ipairs(m.versions) do
			print(" ** "..mod.version[1].."."..mod.version[2].."."..mod.version[3])
			ms[mod.version_string] = mod
		end
		ms[m.short_name] = m.versions[1]
	end

	fs.reset()
	fs.mountAll(allmounts)

	return ms
end

function _M:createModule(short_name, incompatible)
	local dir = "/modules/"..short_name
	print("Creating module", short_name, ":: (as dir)", fs.exists(dir.."/init.lua"), ":: (as team)", short_name:find(".team$"), "")
	if fs.exists(dir.."/init.lua") then
		local mod = self:loadDefinition(dir, nil, incompatible)
		if mod and mod.short_name then
			return mod
		end
	elseif short_name:find(".team$") then
		fs.mount(fs.getRealPath(dir), "/testload", false)
		local mod
		if fs.exists("/testload/mod/init.lua") then
			mod = self:loadDefinition("/testload", dir, incompatible)
		end
		fs.umount(fs.getRealPath(dir))
		if mod and mod.short_name then return mod end
	end
end

--- Get a module definition from the module init.lua file
function _M:loadDefinition(dir, team, incompatible)
	local mod_def = loadfile(team and (dir.."/mod/init.lua") or (dir.."/init.lua"))
--	print("Loading module definition from", team and (dir.."/mod/init.lua") or (dir.."/init.lua"))
	if mod_def then
		-- Call the file body inside its own private environment
		local mod = {rng=rng, config=config}
		setfenv(mod_def, mod)
		mod_def()
		mod.rng = nil
		mod.team = team
		mod.dir = dir

		if not mod.long_name or not mod.name or not mod.short_name or not mod.version or not mod.starter then
			print("Bad module definition", mod.long_name, mod.name, mod.short_name, mod.version, mod.starter)
			return
		end

		-- Test engine version
		local eng_req = engine.version_string(mod.engine)
		mod.version_string = self:versionString(mod)
		if not __available_engines.__byname[eng_req] then
			print("Module mismatch engine version "..mod.version_string.." using engine "..eng_req)
			if incompatible then mod.incompatible = true
			else return end
		end

		-- Make a function to activate it
		mod.load = function(mode)
			if mode == "setup" then
				core.display.setWindowTitle(mod.long_name)
				self:setupWrite(mod)
				if not team then
					fs.mount(fs.getRealPath(dir), "/mod", false)
					fs.mount(fs.getRealPath(dir).."/data/", "/data", false)
					if fs.exists(dir.."/engine") then fs.mount(fs.getRealPath(dir).."/engine/", "/engine", false) end
				else
					local src = fs.getRealPath(team)
					fs.mount(src, "/", false)

					-- Addional teams
					for i, t in ipairs(mod.teams or {}) do
						local base = team:gsub("/[^/]+$", "/")
						local file = base..t[1]:gsub("#name#", mod.short_name):gsub("#version#", ("%d.%d.%d"):format(mod.version[1], mod.version[2], mod.version[3]))
						if fs.exists(file) then
							print("Mounting additional team file:", file)
							local src = fs.getRealPath(file)
							fs.mount(src, t[3], false)
						end
					end
				end

				-- Load moonscript support
				if mod.moonscript then
					require "moonscript"
					require "moonscript.errors"
				end
			elseif mode == "init" then
				local m = require(mod.starter)
				m[1].__session_time_played_start = os.time()
				m[1].__mod_info = mod
				print("[MODULE LOADER] loading module", mod.long_name, "["..mod.starter.."]", "::", m[1] and m[1].__CLASSNAME, m[2] and m[2].__CLASSNAME)
				return m[1], m[2]
			end
		end

		print("Loaded module definition for "..mod.version_string.." using engine "..eng_req)
		return mod
	end
end

--- List all available savefiles
-- Static
function _M:listSavefiles(incompatible_module, moddir_filter)
	local allmounts = fs.getSearchPath(true)
	fs.mount(engine.homepath..fs.getPathSeparator(), "/tmp/listsaves")

	local steamsaves = {}
	if util.steamCanCloud() then
		local list = core.steam.listFilesEndingWith("game.teag")
		for _, file in ipairs(list) do
			local _, _, modname, char = file:find("^([^/]+)/save/([^/]+)/game%.teag$")
			if modname then
				steamsaves[modname] = steamsaves[modname] or {}
				steamsaves[modname][char] = true
			end
		end
	end

	local mods = self:listModules(incompatible_module, moddir_filter)
	for _, mod in ipairs(mods) do
		local lss = {}
		print("Listing saves for module", mod.short_name)
		local oldwrite = fs.getWritePath()
		self:setupWrite(mod, true)
		for i, short_name in ipairs(fs.list("/tmp/listsaves/"..mod.short_name.."/save/")) do
			local sdir = "/save/"..short_name
			local dir = "/tmp/listsaves/"..mod.short_name..sdir
			if fs.exists(dir.."/game.teag") or (util.steamCanCloud() and core.steam.checkFile(sdir.."/game.teag")) then
				if steamsaves[mod.short_name] then steamsaves[mod.short_name][short_name:lower()] = nil end
				if util.steamCanCloud() then core.steam.readFile(sdir.."/desc.lua") end
				local def = self:loadSavefileDescription(dir)
				if def then
					if def.loadable and fs.exists(dir.."/cur.png") then
						def.screenshot = core.display.loadImage(dir.."/cur.png")
					end

					table.insert(lss, def)
				end
			end
		end
		if steamsaves[mod.short_name] then for short_name, _ in pairs(steamsaves[mod.short_name]) do
			local sdir = "/save/"..short_name
			local dir = "/tmp/listsaves/"..mod.short_name..sdir
			if core.steam.checkFile(sdir.."/game.teag") then
				core.steam.readFile(sdir.."/desc.lua")
				local def = self:loadSavefileDescription(dir)
				if def then
					if def.loadable and fs.exists(dir.."/cur.png") then
						def.screenshot = core.display.loadImage(dir.."/cur.png")
					end

					table.insert(lss, def)
				end
			end
		end end
		fs.setWritePath(oldwrite)
		mod.savefiles = lss

		table.sort(lss, function(a, b)
			return a.name < b.name
		end)
	end

	fs.reset()
	fs.mountAll(allmounts)

	return mods
end

--- List all available vault characters
-- Static
function _M:listVaultSaves()
--	fs.mount(engine.homepath, "/tmp/listsaves")

	local mods = self:listModules()
	for _, mod in ipairs(mods) do
		local lss = {}
		for i, short_name in ipairs(fs.list("/"..mod.short_name.."/vault/")) do
			local dir = "/"..mod.short_name.."/vault/"..short_name
			if fs.exists(dir.."/character.teac") then
				local def = self:loadSavefileDescription(dir)
				if def then
					table.insert(lss, def)
				end
			end
		end
		mod.savefiles = lss

		table.sort(lss, function(a, b)
			return a.name < b.name
		end)
	end

--	fs.umount(engine.homepath)

	return mods
end

--- List all available vault characters for the currently running module
-- Static
function _M:listVaultSavesForCurrent()
	local lss = {}
	for i, short_name in ipairs(fs.list("/vault/")) do
		local dir = "/vault/"..short_name
		if fs.exists(dir.."/character.teac") then
			local def = self:loadSavefileDescription(dir)
			if def then
				table.insert(lss, def)
			end
		end
	end

	table.sort(lss, function(a, b)
		return a.name < b.name
	end)
	return lss
end

--- List all available background alterations
function _M:listBackgrounds(mod)
	local defs = {}
	local load = function(dir, teaa)
		local add_def = loadfile(dir.."/boot-screen/init.lua")
		if add_def then
			local add = {}
			setfenv(add_def, add)
			add_def()
			table.print(add)

			add.for_modules = table.reverse(add.for_modules)
			if add.for_modules[mod.short_name] then
				if add.add_backgrounds then 
					for i, d in ipairs(add.add_backgrounds) do
						local nd = {chance=d.chance, name=dir.."/boot-screen/"..d.name}
						if d.logo then nd.logo = dir.."/boot-screen/"..d.logo end
						if teaa then 
							nd.mount = function() fs.mount(fs.getRealPath(teaa), "/testload", false) end
							nd.umount = function() fs.umount(fs.getRealPath(teaa)) end
						end
						defs[#defs+1] = nd
					end
				end
				if add.replace_backgrounds then
					defs = {}
					for i, d in ipairs(add.replace_backgrounds) do
						local nd = {chance=d.chance, name=dir.."/boot-screen/"..d.name}
						if d.logo then nd.logo = dir.."/boot-screen/"..d.logo end
						if teaa then 
							nd.mount = function() fs.mount(fs.getRealPath(teaa), "/testload", false) end
							nd.umount = function() fs.umount(fs.getRealPath(teaa)) end
						end
						defs[#defs+1] = nd
					end
				end
			end
		end
	end

	local parse = function(basedir)
		for i, short_name in ipairs(fs.list(basedir)) do if short_name:find("^.+%-.+") or short_name:find(".teaac$") then
			local dir = basedir..short_name
			-- print("Checking background", short_name, ":: (as dir)", fs.exists(dir.."/init.lua"), ":: (as teaa)", short_name:find(".teaa$"), "")
			if fs.exists(dir.."/boot-screen/init.lua") then
				load(dir, nil)
			elseif short_name:find(".teaa$") or short_name:find(".teaac$") then
				fs.mount(fs.getRealPath(dir), "/testload", false)
				local mod
				if fs.exists("/testload/boot-screen/init.lua") then
					load("/testload", dir)
				end
				fs.umount(fs.getRealPath(dir))
			end
		end end
	end

	-- Add the default one
	-- local backname = util.getval(mod.background_name) or "tome"
	-- defs[#defs+1] = {name="/data/gfx/background/"..backname..".png", logo="/data/gfx/background/"..backname.."-logo.png", chance=100}
	if not mod.background_name then mod.background_name = {"tome"} end
	if type (mod.background_name) == "string" then mod.background_name = {mod.background_name} end
	for i, backname in ipairs(mod.background_name) do
		defs[#defs+1] = {name="/data/gfx/background/"..backname..".png", logo="/data/gfx/background/"..backname.."-logo.png", chance=100}
	end

	-- Look for more
	parse("/addons/")
	parse("/dlcs/")
	
	-- os.exit()

	local def = nil
	while not def or not rng.percent(def.chance or 100) do
		def = rng.table(defs)
	end

	if def.mount then def.mount() end
	local bkgs = core.display.loadImage(def.name) or core.display.loadImage("/data/gfx/background/tome.png")
	local logo = nil
	if def.logo then logo = {(core.display.loadImage(def.logo) or core.display.loadImage("/data/gfx/background/tome-logo.png")):glTexture()} end
	if def.umount then def.umount() end

	if mod.keep_background_texture then mod.keep_background_texture = bkgs end

	return bkgs, logo
end

--- List all available addons
function _M:listAddons(mod, ignore_compat)
	local adds = {}
	local load = function(dir, teaa, teaac)
		local add_def = loadfile(dir.."/init.lua")
		if add_def then
			local add = {}
			setfenv(add_def, add)
			add_def()

			if (ignore_compat or engine.version_nearly_same(mod.version, add.version)) and add.for_module == mod.short_name then
				add.dir = dir
				add.teaa = teaa
				add.teaac = teaac
				add.natural_compatible = engine.version_nearly_same(mod.version, add.version)
				add.version_txt = ("%d.%d.%d"):format(add.version[1], add.version[2], add.version[3])
				if add.addon_version then
					add.addon_version_txt = ("%d.%d.%d"):format(add.addon_version[1], add.addon_version[2], add.addon_version[3])
				else
					add.addon_version_txt = "--"
				end
				if add.dlc and not profile:isDonator(add.dlc) then add.dlc = "no" end
				if add.id_dlc and not profile:allowDLC(add.id_dlc) then add.id_dlc = "no" end
				adds[#adds+1] = add
			end
		end
	end

	local parse = function(basedir)
		for i, short_name in ipairs(fs.list(basedir)) do if short_name:find("^"..mod.short_name.."%-") or short_name:find(".teaac$") then
			local dir = basedir..short_name
			print("Checking addon", short_name, ":: (as dir)", fs.exists(dir.."/init.lua"), ":: (as teaa)", short_name:find(".teaa$"), "")
			if fs.exists(dir.."/init.lua") then
				load(dir, nil)
			elseif short_name:find(".teaa$") then
				fs.mount(fs.getRealPath(dir), "/testload", false)
				local mod
				if fs.exists("/testload/init.lua") then
					load("/testload", dir)
				end
				fs.umount(fs.getRealPath(dir))
			elseif short_name:find(".teaac$") then
				fs.mount(fs.getRealPath(dir), "/testload", false)
				for sdir in fs.iterate("/testload", function(p) return p:find("%-") end) do
					print(" * Addon collection subaddon", sdir)
					local mod
					if fs.exists("/testload/"..sdir.."/init.lua") then
						load("/testload/"..sdir, dir, sdir)
					end
				end
				fs.umount(fs.getRealPath(dir))
			end
		end end
	end
	parse("/addons/")
	parse("/dlcs/")

	table.sort(adds, function(a, b) return a.weight < b.weight end)
	return adds
end

function _M:addonMD5(add, base)
	local t = core.game.getTime()

	if not base then
		if add.teaa then base = fs.getRealPath(add.teaa)
		else base = fs.getRealPath(add.dir) end
	end

	local md5 = require "md5"
	local md5s = {}
	local function fp(dir)
		for i, file in ipairs(fs.list(dir)) do
			local f = dir.."/"..file
			if fs.isdir(f) then
				fp(f)
			elseif f:find("%.lua$") then
				local fff = fs.open(f, "r")
				if fff then
					local data = fff:read(10485760)
					if data and data ~= "" then
						md5s[#md5s+1] = f..":"..md5.sumhexa(data)
					end
					fff:close()
				end
			end
		end
	end

	print("[MODULE LOADER] computing addon md5 from", base)
	fs.mount(base, "/loaded-addons/"..add.short_name, true)
	fp("/loaded-addons/"..add.short_name)
	fs.umount(base)
	table.sort(md5s)
	table.print(md5s)
	local fmd5 = md5.sumhexa(table.concat(md5s))
	print("[MODULE LOADER] addon ", add.short_name, " MD5", fmd5, "computed in ", core.game.getTime() - t, vbase)

	if __module_extra_info.compute_md5_only then
		local f = fs.open(__module_extra_info.compute_md5_only, "a")
		f:write(("%s : addon[%s] md5\n"):format(fmd5, add.version_name))
		f:close()
	end

	return fmd5
end

function _M:loadAddons(mod, saveuse)
	local hashlist = {}
	local adds = self:listAddons(mod, true)

	if saveuse then saveuse = table.reverse(saveuse) end

	local force_remove_addons = {}

	-- Filter based on settings
	for i = #adds, 1, -1 do
		local add = adds[i]
		local removed = false
		if saveuse then
			if not saveuse[add.short_name] then
				print("Removing addon "..add.short_name..": not allowed by savefile")
				table.remove(adds, i) removed = true
			end
		else
			if mod.forbid_addons and table.hasInList(mod.forbid_addons, add.short_name) then
				print("Removing addon "..add.short_name..": module forbids it")
				table.remove(adds, i) removed = true
			elseif add.cheat_only and not config.settings.cheat then
				print("Removing addon "..add.short_name..": cheat mode required")
				table.remove(adds, i) removed = true
			elseif add.dlc == "no" then
				print("Removing addon "..add.short_name..": donator required")
				table.remove(adds, i) removed = true
			elseif add.id_dlc == "no" then
				print("Removing addon "..add.short_name..": DLC not granted")
				table.remove(adds, i) removed = true
			elseif config.settings.addons[add.for_module] and config.settings.addons[add.for_module][add.short_name] ~= nil then
				-- Forbidden by config
				if config.settings.addons[add.for_module][add.short_name] == false then
					print("Removing addon "..add.short_name..": not allowed by config")
					table.remove(adds, i) removed = true
				end
			else
				-- Forbidden by version
				if not add.natural_compatible then
					table.remove(adds, i) removed = true
				end
			end
		end

		if not removed then
			if add.dlc and add.dlc_files then
				if add.dlc_files.classes then
					for _, name in ipairs(add.dlc_files.classes) do
						print("Preloading DLC class", name)
						local data = profile:getDLCD(add.for_module.."-"..add.short_name, ("%d.%d.%d"):format(add.version[1],add.version[2],add.version[3]), name:gsub("%.", "/")..".lua")
						if data and data ~= '' then
							profile.dlc_files.classes[name] = data
						elseif not __module_extra_info.ignore_addons_not_loading then
							print("Removing addon "..add.short_name..": DLC class not received")
							table.remove(adds, i) removed = true
							if saveuse then
								-- The savefile requires it, but we couldnt activate it, abord
								core.game.setRebootMessage(([[The savefile requires the #YELLOW#%s#WHITE# addon.
Some of its features require being online and could not be enabled. To prevent damaging the savefile loading was aborted.

You may try to force loading if you are sure the savefile does not use that addon, at your own risk, by checking the "Ignore unloadable addons" checkbox on the load game screen..]]):format(add.long_name))
								util.showMainMenu(nil, nil, nil, nil, nil, nil, "show_ignore_addons_not_loading=true")
							end
							break
						else
							add.dlc = "no"
							print("Removing addon "..add.short_name..": dlc file required not found")
							table.remove(adds, i) removed = true
						end
					end
				end
			end

			if add.disable_addons then
				table.merge(force_remove_addons, table.reverse(add.disable_addons))
			end
		end
	end

	-- Let addons disable addons!
	for i = #adds, 1, -1 do
		local add = adds[i]
		if force_remove_addons[add.short_name] then
			print("Removing addon "..add.short_name..": disabled by an other addon")
			table.remove(adds, i)
		end
	end

	-- Let addons require other addons, this must be done last so that all addons are filtered, and repeated until no addons complain
	local function handle_requires_addons()
		for i = #adds, 1, -1 do
			local add = adds[i]
			if add.requires_addons then
				local unfound_name
				local ok = true
				for _, sn in ipairs(add.requires_addons) do
					local found = false
					for _, radd in ipairs(adds) do
						if radd.short_name == sn then found = true break end
					end
					if not found then ok = false unfound_name = sn break end
				end

				if not ok then
					print("Removing addon "..add.short_name..": missing required addon "..tostring(unfound_name))
					table.remove(adds, i)
					-- Retry
					handle_requires_addons()
				end
			end
		end
	end
	handle_requires_addons()

	local hooks_list = {}
	mod.addons = {}
	_G.__addons_superload_order = {}
	for i, add in ipairs(adds) do
		add.version_name = ("%s-%s-%d.%d.%d"):format(mod.short_name, add.short_name, add.version[1], add.version[2], add.version[3])

		print("Binding addon", add.long_name, add.teaa, add.version_name)
		local base
		if add.teaa then
			base = fs.getRealPath(add.teaa)
		else
			base = fs.getRealPath(add.dir)
		end

		if add.data then
			print(" * with data")
			if add.teaac then fs.mount("subdir:/"..add.teaac.."/data/|"..fs.getRealPath(add.teaa), "/data-"..add.short_name, true)
			elseif add.teaa then fs.mount("subdir:/data/|"..fs.getRealPath(add.teaa), "/data-"..add.short_name, true)
			else fs.mount(base.."/data", "/data-"..add.short_name, true)
			end
		end
		if add.superload then 
			print(" * with superload")
			if add.teaac then fs.mount("subdir:/"..add.teaac.."/superload/|"..fs.getRealPath(add.teaa), "/mod/addons/"..add.short_name.."/superload", true)
			elseif add.teaa then fs.mount("subdir:/superload/|"..fs.getRealPath(add.teaa), "/mod/addons/"..add.short_name.."/superload", true)
			else fs.mount(base.."/superload", "/mod/addons/"..add.short_name.."/superload", true)
			end
			
			table.insert(_G.__addons_superload_order, add.short_name)
		end
		if add.overload then
			print(" * with overload")
			if add.teaac then fs.mount("subdir:/"..add.teaac.."/overload/|"..fs.getRealPath(add.teaa), "/", false)
			elseif add.teaa then fs.mount("subdir:/overload/|"..fs.getRealPath(add.teaa), "/", false)
			else fs.mount(base.."/overload", "/", false)
			end
		end
		if add.hooks then
			if add.teaac then fs.mount("subdir:/"..add.teaac.."/hooks/|"..fs.getRealPath(add.teaa), "/hooks/"..add.short_name, true)
			elseif add.teaa then fs.mount("subdir:/hooks/|"..fs.getRealPath(add.teaa), "/hooks/"..add.short_name, true)
			else fs.mount(base.."/hooks", "/hooks/"..add.short_name, true)
			end

         		hooks_list[#hooks_list+1] = "/hooks/"..add.short_name
			print(" * with hooks")
		end

		-- Compute addon md5
		local hash_valid, hash_err
		if config.settings.cheat and not __module_extra_info.compute_md5_only then
			hash_valid, hash_err = false, "cheat mode skipping addon validation"
		else
			local fmd5 = self:addonMD5(add)
			hashlist[#hashlist+1] = {module=mod.short_name, addon=add.version_name, md5=fmd5}
--			hash_valid, hash_err = profile:checkAddonHash(mod.short_name, add.version_name, fmd5)
		end

--		if hash_err then hash_err = hash_err .. " [addon: "..add.short_name.."]" end
--		add.hash_valid, add.hash_err = hash_valid, hash_err

		mod.addons[add.short_name] = add
	end

	-- We load hooks at the end of all superloads and overloads
	-- If the code in /hooks/ is run earlier, it will load early versions of the dependent files and subsequent superloads and overloads will be disregarded.
	print("Post-processing hooks.")
	for i, dir in ipairs(hooks_list) do
		self:setCurrentHookDir(dir.."/")
		local addname = dir:gsub(".*/", "")
		local superload = (function(add)
			return function(bname, f)
				_G.__addons_fn_superloads[add] = _G.__addons_fn_superloads[add] or {}
				_G.__addons_fn_superloads[add][bname] = _G.__addons_fn_superloads[add][bname] or {}
				table.insert(_G.__addons_fn_superloads[add][bname], f)
			end
		end)(addname)
		local f, err = loadfile(dir.."/load.lua")
		if not f and err then error(err) end
		setfenv(f, setmetatable({superload = superload, __addon_name = addname}, {__index = _G}))
		f()
	end
	self:setCurrentHookDir(nil)
	return hashlist
end

-- Grab some fun facts!
function _M:selectFunFact(ffdata)
	local l = {}
	local ok = false

	print("Computing fun facts")
	print(pcall(function()

		if ffdata.total_time then l[#l+1] = "Total playtime of all registered players:\n"..ffdata.total_time end
		if ffdata.top_five_races then l[#l+1] = ("#LIGHT_BLUE#%s#WHITE# is one of the top five played races"):format(rng.table(ffdata.top_five_races).name) end
		if ffdata.top_five_classes then l[#l+1] = ("#LIGHT_BLUE#%s#WHITE# is one of the top five played classes"):format(rng.table(ffdata.top_five_classes).name) end
		if ffdata.top_ten_killer then l[#l+1] = ("#CRIMSON#%s#WHITE# is one of the top ten killers"):format(rng.table(ffdata.top_ten_killer).name:capitalize()) end
		if ffdata.top_ten_raceclass then l[#l+1] = ("#LIGHT_BLUE#%s#WHITE# is one of the top ten race/class combo"):format(rng.table(ffdata.top_ten_raceclass).name:capitalize()) end
		if ffdata.nb_players then l[#l+1] = ("There are currently %d people playing online"):format(ffdata.nb_players) end
		if ffdata.total_deaths then l[#l+1] = ("The character's vault has registered a total of #RED#%d#WHITE# character's deaths"):format(ffdata.total_deaths) end
		if ffdata.wins_this_version then l[#l+1] = ("The character's vault has registered a total of #LIGHT_BLUE#%d#WHITE# winners for the current version"):format(ffdata.wins_this_version) end
		if ffdata.latest_donator then l[#l+1] = ("The latest donator is #LIGHT_GREEN#%s#WHITE#. Many thanks to all donators, you are keeping this game alive!"):format(ffdata.latest_donator) end
		ok = true
	end))
	if not ok then return false end
	-- table.print(l)

	return #l > 0 and rng.table(l) or false
end

--- Make a module loadscreen
function _M:loadScreen(mod)
	core.display.forceRedraw()
	core.wait.enable(10000, function()
		local has_max = mod.loading_wait_ticks
		if has_max then core.wait.addMaxTicks(has_max) end
		local i, max, dir = has_max or 20, has_max or 20, -1
		local bkgs, logo = self:listBackgrounds(mod)

		local sw, sh = core.display.size()
		local bw, bh = bkgs:getSize()
		local obw, obh = bkgs:getSize()
		local bkg = {bkgs:glTexture()}

		local pubimg, publisher = nil, nil
		if mod.publisher_logo then
			pubimg, publisher = core.display.loadImage("/data/gfx/background/"..mod.publisher_logo..".png"), nil
		end
		if pubimg then publisher = {pubimg:glTexture()} end

		mod.waiter_load_ui = mod.waiter_load_ui or "dark-ui"

		local left = {core.display.loadImage("/data/gfx/"..mod.waiter_load_ui.."/waiter/left.png"):glTexture()}
		local right = {core.display.loadImage("/data/gfx/"..mod.waiter_load_ui.."/waiter/right.png"):glTexture()}
		local middle = {core.display.loadImage("/data/gfx/"..mod.waiter_load_ui.."/waiter/middle.png"):glTexture()}
		local bar = {core.display.loadImage("/data/gfx/"..mod.waiter_load_ui.."/waiter/bar.png"):glTexture()}

		local font = FontPackage:get("small")
		local bfont = FontPackage:get("default")

		local dw, dh = math.floor(sw / 2), left[7]
		local dx, dy = math.floor((sw - dw) / 2), sh - dh

		local funfacts = nil
		local ffdata = profile.funfacts

		local tip = nil
		if mod.load_tips then pcall(function()
			local l = rng.table(mod.load_tips)
			local img = nil
			if l.image then
				local i = core.display.loadImage(l.image)
				if i then img = {i:glTexture()} end
			end
			local text = bfont:draw(l.text, dw - (img and img[6] or 0), 255, 255, 255)
			local text_h = #text * text[1].h

			local Base = require "engine.ui.Base"
			local frame = Base:makeFrame("ui/tooltip/", dw + 30, math.max((img and img[7] or 0) + (l.img_y_off or 0), text_h) + 30)

			tip = function(x, y)
				y = y - frame.h - 30
				Base:drawFrame(frame, x+1, y+1, 0, 0, 0, 0.3)
				Base:drawFrame(frame, x-3, y-3, 1, 1, 1, 0.75)
				x = x + 10
				y = y + 10

				if img then
					img[1]:toScreenFull(x, y + (l.img_y_off or 0), img[6], img[7], img[2], img[3])
					x = x + img[6] + 7
				end

				y = y - 10 + math.floor((frame.h - text_h) / 2)
				for i = 1, #text do
					local item = text[i]
					if not item then break end
					item._tex:toScreenFull(x+2, y+2, item.w, item.h, item._tex_w, item._tex_h, 0, 0, 0, 0.8)
					item._tex:toScreenFull(x, y, item.w, item.h, item._tex_w, item._tex_h)
					y = y + item.h
				end
			end
		end) end

		local ffw = math.ceil(sw / 4)
		if ffdata and mod.show_funfacts then
			local str = self:selectFunFact(ffdata)
			if str then pcall(function()
				local text, _, tw = font:draw(str, ffw, 255, 255, 255)
				local text_h = #text * text[1].h
				ffw = math.min(ffw, tw)

				local Base = require "engine.ui.Base"
				local frame = Base:makeFrame("ui/tooltip/", ffw + 30, text_h + 30)
				funfacts = function(x, y)
					x = x - ffw - 30
					Base:drawFrame(frame, x+1, y+1, 0, 0, 0, 0.3)
					Base:drawFrame(frame, x-3, y-3, 1, 1, 1, 0.5)
					x = x + 10
					y = y + 10

					y = y - 10 + math.floor((frame.h - text_h) / 2)
					for i = 1, #text do
						local item = text[i]
						if not item then break end
						item._tex:toScreenFull(x+2, y+2, item.w, item.h, item._tex_w, item._tex_h, 0, 0, 0, 0.5)
						item._tex:toScreenFull(x, y, item.w, item.h, item._tex_w, item._tex_h, 1, 1, 1, 0.85)
						y = y + item.h
					end
				end
			end) end
		end

		return function()
			-- Background
			local x, y = 0, 0
			bw, bh = sw, sh
			if bw > bh then
				bh = bw * obh / obw
				y = (sh - bh) / 2
				if bh < sh then
					bh = sh
					bw = bh * obw / obh
					x = (sw - bw) / 2
					y = 0
				end
			else
				bw = bh * obw / obh
				x = (sw - bw) / 2
			end
			bkg[1]:toScreenFull(x, y, bw, bh, bw * bkg[2] / obw, bh * bkg[3] / obh)

			-- Logo
			if logo then logo[1]:toScreenFull(0, 0, logo[6], logo[7], logo[2], logo[3]) end

			-- Publisher Logo
			if publisher then publisher[1]:toScreenFull(sw - publisher[6], 0, publisher[6], publisher[7], publisher[2], publisher[3]) end

			-- Progressbar
			local x
			if has_max then
				i, max = core.wait.getTicks()
				i = util.bound(i, 0, max)
			else
				i = i + dir
				if dir > 0 and i >= max then dir = -1
				elseif dir < 0 and i <= -max then dir = 1
				end
			end

			local x = dw * (i / max)
			local x2 = x + dw
			x = util.bound(x, 0, dw)
			x2 = util.bound(x2, 0, dw)
			if has_max then x, x2 = 0, x end
			local w, h = x2 - x, dh

			middle[1]:toScreenFull(dx, dy, dw, middle[7], middle[2], middle[3])
			bar[1]:toScreenFull(dx + x, dy, w, bar[7], bar[2], bar[3])
			left[1]:toScreenFull(dx - left[6] + 5, dy + (middle[7] - left[7]) / 2, left[6], left[7], left[2], left[3])
			right[1]:toScreenFull(dx + dw - 5, dy + (middle[7] - right[7]) / 2, right[6], right[7], right[2], right[3])

			if has_max then
				font:setStyle("bold")
				local txt = {core.display.drawStringBlendedNewSurface(font, math.min(100, math.floor(core.wait.getTicks() * 100 / max)).."%", 255, 255, 255):glTexture()}
				font:setStyle("normal")
				txt[1]:toScreenFull(dx + (dw - txt[6]) / 2 + 2, dy + (bar[7] - txt[7]) / 2 + 2, txt[6], txt[7], txt[2], txt[3], 0, 0, 0, 0.6)
				txt[1]:toScreenFull(dx + (dw - txt[6]) / 2, dy + (bar[7] - txt[7]) / 2, txt[6], txt[7], txt[2], txt[3])
			end

			if tip then tip(dw / 2, dy) end
			if funfacts then funfacts(sw, 10) end
			
			local errs = core.game.checkError()
			if errs then
				local errgame = require("engine.BootErrorHandler").new(errs, mod)
				_G.game = errgame
				errgame:setCurrent()
				core.wait.disable()
			end
		end
	end)
	core.display.forceRedraw()
end


--- Instanciate the given module, loading it and creating a new game / loading an existing one
-- @param mod the module definition as given by Module:loadDefinition()
-- @param name the savefile name
-- @param new_game true if the game must be created (aka new character)
-- @param no_reboot
-- @param extra_module_info
function _M:instanciate(mod, name, new_game, no_reboot, extra_module_info)
	if not no_reboot then
		local eng_v = nil
		if not mod.incompatible then eng_v = ("%d.%d.%d"):format(mod.engine[1], mod.engine[2], mod.engine[3]) end
		util.showMainMenu(false, mod.engine[4], eng_v, mod.version_string, name, new_game, extra_module_info)
		return
	end

	if mod.short_name == "boot" then profile.hash_valid = true end

	mod.version_name = ("%s-%d.%d.%d"):format(mod.short_name, mod.version[1], mod.version[2], mod.version[3])

	print("[MODULE] booting module version", mod.version_name)

	-- Make sure locale is correct
	core.game.resetLocale()

	-- Turn based by default
	core.game.setRealtime(0)

	-- Disable particles FBO
	core.particles.defineFramebuffer(nil)

	-- FOV Shape
	core.fov.set_algorithm("large_ass")
	core.fov.set_permissiveness(0.01)
	core.fov.set_actor_vision_size(1)
	core.fov.set_vision_shape("circle")

	-- Init the module directories
	fs.mount(engine.homepath, "/")
	mod.load("setup")

	-- Load localizations
	if mod.i18n_support then
		I18N:loadLocale("/data/i18n/"..config.settings.locale..".lua")
		I18N:setLocale(config.settings.locale or "en_US")
	end

	-- Load font packages
	FontPackage:loadDefinition("/data/font/packages/default.lua")
	if mod.font_packages_definitions then FontPackage:loadDefinition(mod.font_packages_definitions) end
	FontPackage:setDefaultId(util.getval(mod.font_package_id))
	FontPackage:setDefaultSize(util.getval(mod.font_package_size))

	-- Check the savefile if possible, to add to the progress bar size
	local savesize = 0
	local save = Savefile.new("")
	savesize = save:loadWorldSize() or 0
	save:close()

	-- Load the savefile if it exists, or create a new one if not (or if requested)
	local save = engine.Savefile.new(name)
	local save_desc
	if save:check() and not new_game then
		savesize = savesize + save:loadGameSize()
		save_desc = self:loadSavefileDescription(save.save_dir)
	end
	save:close()

	-- Display the loading bar
	profile.waiting_auth_no_redraw = true
	self:loadScreen(mod)
	core.wait.addMaxTicks(savesize)

	-- Check MD5sum with the server
	local md5 = require "md5"
	local md5s = {}
	local function fp(dir)
		for i, file in ipairs(fs.list(dir)) do
			local f = dir.."/"..file
			if fs.isdir(f) then
				fp(f)
			elseif f:find("%.lua$") and f ~= "/mod/addons/dgo/superload/engine/PlayerProfile.lua" then				
				local fff = fs.open(f, "r")
				if fff then
					local data = fff:read(10485760)
					if data and data ~= "" then
						md5s[#md5s+1] = f..":"..md5.sumhexa(data)
					end
					fff:close()
				end
			end
		end
	end
	local hash_valid, hash_err
	local t = core.game.getTime()
	local module_md5 = "--"
	if config.settings.cheat and not __module_extra_info.compute_md5_only then
		hash_valid, hash_err = false, "cheat mode skipping validation"
	else
		if mod.short_name ~= "boot" then
			fp("/mod")
			fp("/data")
			fp("/engine")
			table.sort(md5s)
			module_md5 = md5.sumhexa(table.concat(md5s))
			print("[MODULE LOADER] module MD5", module_md5, "computed in ", core.game.getTime() - t)

			if __module_extra_info.compute_md5_only then
				local f = fs.open(__module_extra_info.compute_md5_only, "w")
				f:write(("%s : module[%s] md5\n"):format(module_md5, mod.version_string))
				f:close()
			end
		end
	end

	local hashlist = self:loadAddons(mod, (save_desc and save_desc.addons) or (__module_extra_info.set_addons))