local bExit = false
local sDir = (shell and shell.dir()) or ""
local tEnv = {}

local function fnRun( _sCommand, ... )
	-- Look in the current dir first
	local sPath = fs.combine( sDir, _sCommand )
    if fs.exists( sPath ) and not fs.isDir( sPath ) then
    	return os.run( tEnv, sPath, ... )
    end

    -- Then look at programs
    local sPath = fs.combine( "rom/programs", _sCommand )
    if fs.exists( sPath ) and not fs.isDir( sPath ) then
    	return os.run( tEnv, sPath, ... )
    end

    -- Then fail
    print( "No such program" )
    return false
end

-- Install shell API -- startup
tEnv["shell"] = {
    ["exit"] = function( )
      bExit = true
    end,
    ["dir"] = function( )
      return sDir
    end,
    ["setDir"] = function( _sDir )
      sDir = _sDir
    end,
    ["resolve"] = function( _sPath )
      local sStartChar = string.sub( _sPath, 1, 1 )
      if sStartChar == "/" or sStartChar == "\\" then
      	return fs.combine( "", _sPath )
      else
      	return fs.combine( sDir, _sPath )
      end
    end,
    ["run"] = function( _sCommand, ... )
    	fnRun( _sCommand, ... )
    end,
}

print( os.version() )
print("______           _  _    _               _            ___   _         _              _   _  _____   _____  __  ")
print("| ___ \         | || |  | |             | |          / _ \ | |       | |            | | | ||  _  | |  _  |/  | ")
print("| |_/ / ___   __| || |  | |  ___   _ __ | | __ ___  / /_\ \| | _ __  | |__    __ _  | | | || |/' | | |/' |`| | ")
print("|    / / _ \ / _` || |/\| | / _ \ | '__|| |/ // __| |  _  || || '_ \ | '_ \  / _` | | | | ||  /| | |  /| | | | ")
print("| |\ \|  __/| (_| |\  /\  /| (_) || |   |   < \__ \ | | | || || |_) || | | || (_| | \ \_/ /\ |_/ /_\ |_/ /_| |_")
print("\_| \_|\___| \__,_| \/  \/  \___/ |_|   |_|\_\|___/ \_| |_/|_|| .__/ |_| |_| \__,_|  \___/  \___/(_)\___/ \___/")
print("                                                              | |                                              ")
print("                                                              |_|                                              ")
passwords = {
        ['Sarkynin'] = '12345',
        ['root'] = 'root'

		}

		term.clear()term.setCursorPos(1,1)

		while true do
		print '\nUsername'
        user = read()
        if passwords[user] ~= nil then
		break
 		end
        print '\nInvalid Username'
        sleep(1)
		end
		tries = 5
		while tries > 0
		do        print '\nPassword'
        pass = read()
        if passwords[user] == pass then
		break
        end
        print '\nIncorrect Password'
        tries = tries - 1
        sleep(1)
		end
		if tries <= 0 then
        print '\nMaximum number of tries used.'
        sleep(2)
        print 'System will now shut down.'
        sleep(2)
        os.shutdown()
		end
		print('\nWelcome, ' .. user .. '.')

local tArgs = { ... }
if #tArgs > 0 then
	fnRun( ... )
end

while not bExit do
	io.write( sDir .. "> " )

	local sLine = read( )
	local tWords = {}
	for match in string.gmatch(sLine, "[^ \t]+") do
		table.insert( tWords, match )
	end

	local sCommand = tWords[1]
	if sCommand then
		fnRun( sCommand, unpack( tWords, 2 ) )
	end
end