using System.Text.Json;
using DX86;
using DX86.Modules;
using Library;

namespace Server;

    class Program
    {
        public static MessageSender messageSender;
        public static MessageBox messageBox;
        public static InputBox inputBox;
        public static ItemSelector itemSelector;
        public static MySQL mySql;
        private static List<TcpServer> servers;

        static void Main(string[] args)
        {
            Console.WriteLine("Initializing server...");
            // Initialize UI and logging components
            messageSender = new MessageSender("log.txt");
            messageBox    = new MessageBox(messageSender);
            inputBox      = new InputBox(messageSender);
            itemSelector  = new ItemSelector(messageSender);
            servers       = new List<TcpServer>();

            // 1) Load existing DB config or prompt user + initialize
            mySql = LoadOrInitDatabase();

            // 2) Start the rest of your server loop
            ServerLoop();
        }

        private static MySQL LoadOrInitDatabase()
        {
            var cfg = DbConfig.Load();
            if (cfg != null)
            {
                messageSender.Log("[Program] Loaded existing database configuration.");
                // Use existing credentials to connect (including cfg.Port)
                return new MySQL(cfg.Username, cfg.Password, cfg.Server, cfg.Port, cfg.Database, messageSender);
            }
            else
            {
                messageSender.Warn("[Program] No existing DB configuration found. Starting init…");

                // REPLACE THE FOUR PROMPTS WITH YOUR FIVE ShowAsync(...) CALLS:
                string username = inputBox.ShowAsync("MySQL Configuration [1/5]", ["Username for MySQL Connections"]);
                string password = inputBox.ShowAsync("MySQL Configuration [2/5]", ["Password for MySQL Connections"]);
                string server   = inputBox.ShowAsync("MySQL Configuration [3/5]", ["Server Address for MySQL Connections"]);
                string port     = inputBox.ShowAsync("MySQL Configuration [4/5]", ["Port for MySQL Connections"]);
                string database = inputBox.ShowAsync("MySQL Configuration [5/5]", ["Database Name for Database Connections"]);

                return InitializeDatabase(username, password, server, port, database);
            }
        }

        /// <summary>
        /// Creates a new MySQL connection, runs the CREATE TABLE DDL,
        /// saves credentials in config.json, and returns the MySQL instance.
        /// </summary>
private static MySQL InitializeDatabase(
    string username,
    string password,
    string server,
    string port,
    string database
)
{
    // 1) Instantiate MySQL (will exit on failure)
    var db = new MySQL(username, password, server, port, database, messageSender);

    // 2) Create the 'employees' table if it does not exist:
    string createEmployeesTable = @"
        CREATE TABLE IF NOT EXISTS `employees` (
            `Id`            VARCHAR(36)    NOT NULL PRIMARY KEY,
            `Code`          VARCHAR(50)    NOT NULL,
            `Surname`       VARCHAR(100)   NOT NULL,
            `Forename`      VARCHAR(100)   NOT NULL,
            `Email`         VARCHAR(150)   NOT NULL,
            `Phone`         VARCHAR(50),
            `Street`        VARCHAR(200),
            `City`          VARCHAR(100),
            `Postcode`      VARCHAR(20),
            `Country`       VARCHAR(100),
            `Department`    VARCHAR(100),
            `Position`      VARCHAR(100),
            `EmployeeState` INT            NOT NULL
        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
    ";

    messageSender.Log("[Program] Creating 'employees' table if not present…");
    var resultJson = db.ExecuteNonQuery(createEmployeesTable);

    // Parse resultJson safely using JsonDocument
    try
    {
        using var doc = JsonDocument.Parse(resultJson);
        var root = doc.RootElement;

        // Expecting { "error": bool, "data": ... }
        bool isError = root.GetProperty("error").GetBoolean();
        if (isError)
        {
            // You can inspect root.GetProperty("data").GetString() if needed
            messageSender.Error("[Program] Failed to create 'employees' table: " + resultJson);
            Environment.Exit(1);
        }
    }
    catch (Exception ex)
    {
        // If something went wrong parsing JSON, treat it as a fatal error
        messageSender.Error($"[Program] Could not parse CREATE TABLE response: {ex.Message}");
        messageSender.Error("[Program] Raw response: " + resultJson);
        Environment.Exit(1);
    }

    messageSender.Log("[Program] 'employees' table is ready.");

    // TODO: repeat db.ExecuteNonQuery(...) for any other tables you need

    // 3) Save the new credentials (including port) into config.json:
    var newCfg = new DbConfig
    {
        Username = username,
        Password = password,
        Server   = server,
        Port     = port,
        Database = database
    };
    newCfg.Save();
    messageSender.Log("[Program] Saved DB configuration to config.json.");

    return db;
}

        private static void ServerLoop()
        {
            bool running = true;
            string[] menuItems;
            string selectedItem;
            servers.Add(new BackendServer("0.0.0.0", 3767, messageSender));
            // Main server loop
            while (running)
            {
                menuItems = new[] { "Benutzerverwaltung", "Einstellungen", "Beenden" };
                itemSelector.SetTitle("Hauptmenü");
                //selectedItem = itemSelector.SelectItemFromList(menuItems);
            }
        }
    }