os.pullEvent = os.pullEventRaw
local w,h = term.getSize()
local password_server = 19
local username = ""
local password = ""
rednet.open("left")
local function printCentered(str,ypos)
 term.setCursorPos(w/2 - #str/2,ypos)
 term.write(str)
end

local function printLocation(str,xpos,ypos)
term.setCursorPos(xpos,ypos)
term.write(str)
end

function Login()
rednet.send(password_server,"1")
write("Username:")
username = read()
write("Password:")
password = read()
rednet.send(password_server,username);
senderId,message,distance = rednet.receive(5)
if message == password then
runTekos()
end
end
function SendFile()
rednet.send(password_sever,"5")
print("Filename:")
local filename = read()
if not fs.isDir("files") then
fs.makeDir("files")
end
local FD = fs.combine("files",filename)
rednet.send(password_server,filename)
f = fs.open(FD,"r")
local code = f.readAll()
f.close()
rednet.send(password_server,code)
end

function DownloadFile()
rednet.send(password_server,"6")
print("Filename:")
local filename = read()
if not fs.isDir("files") then
fs.makeDir("files")
end
rednet.send(password_server,filename)
FD = fs.combine("files", filename)
f = fs.open(FD, "w")
senderId, message, distance = rednet.receive(5)
 f.write(message)
 f.close()
end

function FileList()
rednet.send(password_server,"7")
rednet.send(password_server,"Hello")
senderId,message,distance = rednet.receive(5)
print(message)
end

function PrivateSend()
rednet.send(password_server,"8")
print("Filename:")
local filename = read()
local FD = fs.combine("files", filename)
rednet.send(password_server,username)
rednet.send(password_server,filename)
f = fs.open(FD,"r")
local code = f.readAll()
f.close()
rednet.send(password_server,code)
end

function PrivateDownload()
rednet.send(password_server,"9")
print("Filename:")
local filename = read()
if not fs.isDir("files") then
fs.makeDir("files")
end
rednet.send(password_server,username)
rednet.send(password_server,filename)
FD = fs.combine("files", filename)
f = fs.open(FD, "w")
senderId, message, distance = rednet.receive(5)
 f.write(message)
 f.close()
end

function PrivateList()
rednet.send(password_server,"10")
rednet.send(password_server,username)
senderId,message,distance = rednet.receive(5)
print(message)
end
function runFTP()
term.clear()
term.setCursorPos(1,1)
print("Welcome")
print("What would you like to do")
print("[1] SendFile")
print("[2] DownloadFile")
print("[3] fileList")
print("[4] Send Private File")
print("[5] Download Private File")
print("[6] Private FileList")
print("[7] Back")
local input = read()

if input == "1" then
SendFile()
elseif input == "2" then
DownloadFile()
elseif input == "3" then
FileList()
elseif input == "4" then
PrivateSend()
elseif input == "5" then
PrivateDownload()
elseif input == "6" then
PrivateList()
elseif input == "7" then
runTekos()
end
end

function getFileList()
if not fs.isDir("files") then
fs.makeDir("files")
end
list = fs.list("files")
local str = textutils.serialize(list)
print(str)
end

function copyFileFromDisk()
print("Filename:")
local filename = read()
local FD = fs.combine("files",filename)
local DD = fs.combine("disk",filename)
 fs.copy(DD,FD)
end

function copyFileToDisk()
print("Filename:")
local filename = read()
local FD = fs.combine("files",filename)
local DD = fs.combine("disk",filename)
 fs.copy(FD,DD)
end

function runFileSystem()
term.clear()
term.setCursorPos(1,1)
print("Welcome")
print("What would you like to do")
print("[1] run file")
print("[2] get FileList")
print("[3] copy file from disk")
print("[4] copy file to disk")
print("[5] Back")
local input = read()

end
function runTekos()
while true do
term.clear()
term.setCursorPos(1,1)
print("Welcome", username)
print("What would you like to do?")
print("[1] FileSystem")
print("[2] FTP")
print("[3] Quit")
local input = read()
if input  == "1" then
runFileSystem()
elseif input == "2" then
runFTP()
elseif input =="3" then
os.shutdown()
end
end
end

function runClient()
while true do
term.clear()
term.setCursorPos(1,1)
print("Welcome!")
print("What would you like to do")
print("[1] Login")
print("[2] Exit")
local input = read()

if input == "1" then
Login()
elseif input == "2" then
os.shutdown()
end
end
end

runClient()