-- IndustrialTest
-- Copyright (C) 2025 mrkubax10

-- 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/>.

local S=minetest.get_translator("industrialtest")

local pages={
	introduction={
		title=S("Introduction"),
		icon=industrialtest.elementKeys.paper,
		content=[[
			<big>Introduction</big>
			<left>
				IndustrialTest implements finite power functionality which can be used to perform various tasks using generators and consumers. Such features are not a new thing in Luanti, as there are older mods which do that already. This mod, however, proves to be more flexible.
			</left>
		]]
	}
}

local function getGuideFormspec(playerName,pageName)
	local formspec={
		"formspec_version[4]",
		"size[15,10.8]",
		"label[0.1,0.2;"..S("IndustrialTest Guide").."]",
		--"scrollbaroptions[]",
		"scrollbar[3.6,0.4;0.5,10.3;vertical;scrollbarList;0]",
		"scroll_container[0.1,0.4;4,10.3;scrollbarList;vertical]"
	}

	-- Contents sidebar
	local PAGE_BUTTON_HEIGHT=0.7
	local index=0
	for name,page in pairs(pages) do
		table.insert(formspec,string.format("container[0,%f]",index*PAGE_BUTTON_HEIGHT))
		table.insert(formspec,string.format("item_image[0,0;%f,%f;%s]",PAGE_BUTTON_HEIGHT,PAGE_BUTTON_HEIGHT,page.icon))
		table.insert(formspec,string.format("button[%f,0;%f,%f;%s;%s]",PAGE_BUTTON_HEIGHT+0.05,3.45-PAGE_BUTTON_HEIGHT,PAGE_BUTTON_HEIGHT,name,page.title))
		table.insert(formspec,"container_end[]")
		index=index+1
	end
	table.insert(formspec,"scroll_container_end[]")

	if pageName and pages[pageName] then
		table.insert(formspec,string.format("hypertext[4.2,0.4;10.7,10.3;content;%s]",pages[pageName].content))
	end

	return table.concat(formspec,"")
end

local function showGuide(playerName,page)
	minetest.show_formspec(playerName,"industrialtest:guide",getGuideFormspec(playerName,page))
	return true
end

local function handleGuideFields(player,formname,fields)
	if formname~="industrialtest:guide" then
		return
	end

	for name,_ in pairs(pages) do
		if fields[name] then
			minetest.close_formspec(player:get_player_name(),formname)
			showGuide(player:get_player_name(),name)
			break
		end
	end
end
minetest.register_on_player_receive_fields(handleGuideFields)

minetest.register_chatcommand("industrialtest_guide",{
	description=S("Shows graphical guide for content and features provided by IndustrialTest"),
	func=showGuide
})