-- High level abstraction for our serial connection

net = require("internet")
handle = 0
STOP = false
-- io = require("io")
buffer = ""



function cleanup()
    
end

function serial_nextline()
    buffer = ""
    while buffer == "" do
        buffer = handle:read("*l")
    end
    return buffer
end

function modem_connect()
    handle = net.open("192.168.1.10", 8889)
    if handle == nil then
        return false
    end
    return true
end

function modem_initialize()
    if handle == nil then
        print("Modem connect fail!")
        return false
    end
    handle:flush()
    print("Initializing modem...\n")
    print("[SERVER]ATZ...")
    handle:write("ATZ\r") --Disable echo
   
    modemin = ""

    while modemin ~= "OK" do
        modemin = serial_nextline()
        io.stdout:write("[MODEM]")
        print(modemin)
    end
    handle:setTimeout(math.huge)
    print("\nModem Ready!\nIdle for ring...")
   
    while modemin ~= "RING" do
        modemin = serial_nextline()
        print("[MODEM]" .. modemin)
    end



    print("Answering...\n[SERVER]ATA")
    handle:write("ATA\r")

    while string.find(modemin, "CONNECT") == nil do    
        modemin = serial_nextline()
        print("[MODEM]" .. modemin)
    end

    print("CONNECTED!")
    handle:flush()
    io.stdout:flush() 
    -- we're connected! Say hi :)
    
    handle:write("MCBBS0.1a\r\n")
    
    return true
end

function read_thread()
    
    while STOP == false do
        input = serial_nextline()
        print("[REMOTE]" .. input)
    end

end