installer

local dlPath = "https://raw.githubusercontent.com/ebernerd/Cobalt/master/"
local args = { ... }
local beta = false
if args[1] == "beta" then
  dlPath = "https://raw.githubusercontent.com/ebernerd/Cobalt/beta/"
  beta = true
end

local dx, dy = term.getSize()

local function centerPrint( text, y )
	term.clear()
	term.setCursorPos( 1, 1 )
	if beta then
		write( "Cobalt Beta Version Installer" )
	end
	local t = {}
	for i in string.gmatch( text, "%S+" ) do
		t[#t+1] = i
	end
	local lines = {[1] = ""}
	local line = 1
	for i=1, #t do
		if #tostring(lines[line].." "..t[i]) > dx then
			lines[line] = lines[line] .. "\n"
			line = line + 1
			lines[line] = " " .. t[i]
		else
			lines[line] = lines[line] .. " " .. t[i]
		end
	end
	y = y or math.ceil(dy/2-#lines/2)
	for i = 1, #lines do
		term.setCursorPos( dx/2-#lines[i]/2, y+(i-1))
		print( lines[i])
	end
end

local function getFile( file, path )
	centerPrint( "Downloading " .. file .. " to \"" .. path .. "\"")
	local dl = http.get( dlPath..file )
	local h = dl.readAll()
	dl.close()

	local f = fs.open( path, "w" )
	f.write( h )
	f.close()
end

local function clear( colour )
	term.setBackgroundColour( colour or term.getBackgroundColour() )
	term.clear()
	term.setCursorPos( 1, 1 )
end

local function yn()
	local l = true
	while l do
		local event, key = os.pullEvent()
		if event == "key" then
			if key == 21 then
				return true
			elseif key == 49 then
				return false
			end
		end
	end
end

if beta then
	term.setTextColour( colours.grey )
	clear( colours.grey )
	centerPrint( "Beta access is currently closed. Run again without the beta argument." )
	sleep( 1 )
	os.pullEvent("key_up")
	clear( colours.black )
	
else
	term.setTextColour( colours.white )
	clear( colours.grey )
	centerPrint( "Downloading Cobalt v1.1_3" )
	sleep(0.5)
	getFile( "cobalt", "cobalt" )
	getFile( "cobalt-lib/surface", "cobalt-lib/surface" )
	sleep(0.5)
	centerPrint( "Would you like to download \"Cobalt-UI\", a UI library for Cobalt? (y/n)")
	if yn() then
		print()
		print( "Starting Cobalt-UI download...")
		getFile( "cobalt-ui/init.lua", "cobalt-ui/init.lua" )
		getFile( "cobalt-ui/elements/button.lua", "cobalt-ui/elements/button.lua" )
		getFile( "cobalt-ui/elements/checkbox.lua", "cobalt-ui/elements/checkbox.lua" )
		getFile( "cobalt-ui/elements/radio.lua", "cobalt-ui/elements/radio.lua" )
		getFile( "cobalt-ui/elements/input.lua", "cobalt-ui/elements/input.lua" )
		getFile( "cobalt-ui/elements/panel.lua", "cobalt-ui/elements/panel.lua" )
		getFile( "cobalt-ui/elements/text.lua", "cobalt-ui/elements/text.lua" )
		getFile( "cobalt-ui/elements/textarea.lua", "cobalt-ui/elements/textarea.lua" )
		centerPrint( "Download of Cobalt-UI complete!")
		sleep(0.5)
	end
	centerPrint( "There are no other Cobalt packages as of yet. Enjoy Cobalt!")
	sleep(2)
	centerPrint( "Press any key to exit the installer")
	os.pullEvent('key_up')
	clear( colours.black )
end