ClientEdition

local computerId = os.getComputerID()
local monitor = peripheral.find("monitor")
local modem = peripheral.find("modem")

if modem == nil then
    error("Aucun modem disponible.")
    return
end

local function findModem()
    local sides = { "top", "bottom", "left", "right", "back", "front" }

    for _, side in ipairs(sides) do
        if peripheral.isPresent(side) and peripheral.getType(side) == "modem" then
            return side
        end
    end

    return nil
end

local function connectToServer(protocol, hostname)
    local modemSide = findModem()
    rednet.open(modemSide)
    term.clear()
    print(string.format("Tentative de connexion à %s sur le protocol : %s...", hostname, protocol))
    local serverId = rednet.lookup(protocol)

    if serverId then
        rednet.send(serverId, "Demande de connexion", protocol) -- Envoyer une demande de connexion au serveur
        return serverId
    else
        monitor.clear()
        monitor.setCursorPos(1, 1)
        monitor.setTextScale(1)

        local title = string.format("[ECHEC] Client NetTchat Computer #%s :", os.getComputerID())
        local underline = string.rep("-", #title)

        monitor.write(title)
        monitor.setCursorPos(1, 2)
        monitor.write(underline)

        monitor.setCursorPos(1, 4)
        monitor.write(string.format("Connexion : Aucune"))

        monitor.setCursorPos(1, 5)
        monitor.write(string.format("Erreur : Aucun serveur trouvé pour le protocole : " .. protocol))
        print("Aucun serveur trouvé pour le protocole : " .. protocol)
        return false
    end
end

local function displayStartupMessage()
    local message = "NetTchat Client Edition, created and designed by _Tsyke_ | Ver: 0.1"
    local scale = .8
    monitor.setTextScale(scale)
    monitor.clear()
    local width, height = monitor.getSize()
    local x = math.floor((width - #message) / 2)
    local y = math.floor(height / 2)
    monitor.setCursorPos(x, y)
    monitor.write(message)
    sleep(5)
    monitor.clear()
    monitor.setTextScale(1)
end

local function updateMonitor(hostname, protocol)
    monitor.clear()
    monitor.setCursorPos(1, 1)
    monitor.setTextScale(1)

    local title = string.format("Client NetTchat Computer #%s :", os.getComputerID())
    local underline = string.rep("-", #title)

    monitor.write(title)
    monitor.setCursorPos(1, 2)
    monitor.write(underline)

    monitor.setCursorPos(1, 4)
    monitor.write(string.format("Hostname : %s", hostname))

    monitor.setCursorPos(1, 5)
    monitor.write(string.format("Protocol : %s", protocol))
end

local function startOnClient()
    displayStartupMessage()

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

    print("=== Configuration ===")
    print("Entrez le nom du protocole :")
    term.setCursorPos(1, 4)
    write("> ")
    local selectedProtocol = read()

    print("Entrez le nom d'hôte du serveur:")
    term.setCursorPos(1, 6)
    write("> ")
    local selectedHostname = read()
    local serverId = connectToServer(selectedProtocol, selectedHostname)

    if serverId then
        print("Connexion établie avec le serveur #" .. serverId)
        updateMonitor(selectedHostname, selectedProtocol)

        while true do
            rednet.send(serverId, "Ping", selectedProtocol)

            local senderId, message, protocol = rednet.receive(selectedProtocol, 5)
            if senderId and message == "Pong" then
                print(string.format("Réponse reçue de %d : %s", senderId, message))
            else
                print("Aucune réponse reçue dans les 5 secondes. Déconnexion...")
                return
            end

            sleep(5)
        end
    else
        print("Impossible de se connecter au serveur.")
    end
end

startOnClient()