using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using AutoUpdaterDotNET;
using IOB_UT;
using NLog;
using NLog.Targets;
using NLog.Config;
using System.Configuration;
using System.Net;

namespace IOB_WIN
{
  public partial class MainForm : Form
  {
    #region variabili globali, utils ed helpers

    /// <summary>
    /// Ramo applicazione (x update)
    /// </summary>
    protected string branchName = "develop";
    /// <summary>
    /// Indirizzo server
    /// </summary>
    protected string MPIP = "";
    /// <summary>
    /// URL base applicazione
    /// </summary>
    protected string MPURL = "";
    /// <summary>
    /// chiamata x check alive di base
    /// </summary>
    protected string CMDALIVE = "";
    /// <summary>
    /// chiamata x invio comunicazioen reboot dell'IOBMAN
    /// </summary>
    protected string CMDREBO = "";
    /// <summary>
    /// chiamata x ricevere un codice IOB da gestire/acquisire
    /// </summary>
    protected string CMDIOB2CALL = "";
    /// <summary>
    /// Num max di CNC da gestire
    /// </summary>
    protected int MAXCNC = 1;
    /// <summary>
    /// Lista delle IOB da avviare
    /// </summary>
    protected List<string> IOB2START;
    /// <summary>
    /// oggetto logging
    /// </summary>
    public static Logger lg;
    /// <summary>
    /// Data Avvio form
    /// </summary>
    protected DateTime formStartTime;
    /// <summary>
    /// Data ultimo controllo comunicazione
    /// </summary>
    public DateTime lastComCheck;
    /// <summary>
    /// mostra un testo sulla status bar + LOG
    /// </summary>
    /// <param name="txt2show"></param>
    public void displayTaskAndLog(string txt2show)
    {
      lblStatus.Text = txt2show;
      lblStatus.Invalidate();
      lgInfo(txt2show);
    }
    /// <summary>
    /// Mostra update delle statistiche di comunicazione (num plc connessi, indirizzo server) con colore ad indicare anomalie...
    /// </summary>
    /// <param name="numPLC"></param>
    /// <param name="serverOk"></param>
    public void updateComStats(int numPLC, bool serverOk)
    {
      // testo
      lblComStats.Text = string.Format("{0} PLC --> {1} (MP/IO)", numPLC, MPIP);
      // colore secondo valori... server !="ND" è ok, PLC > 0 è OK
      int score = 0;
      if (serverOk) score++;
      if (numPLC > 0) score++;
      switch (score)
      {
        case 0:
          lblComStats.ForeColor = Color.Red;
          break;
        case 1:
          lblComStats.ForeColor = Color.Orange;
          break;
        case 2:
          lblComStats.ForeColor = Color.Green;
          break;
        default:
          lblComStats.ForeColor = Color.Gray;
          break;
      }
    }

    /// <summary>
    /// Effettua logging INFO corretto impostanto anche la variabile IOB prima di scrivere...
    /// </summary>
    /// <param name="txt2log"></param>
    protected void lgInfo(string txt2log)
    {
      lg.Factory.Configuration.Variables["codIOB"] = "MAIN";
      lg.Info(txt2log);
    }
    /// <summary>
    /// Effettua logging ERROR corretto impostanto anche la variabile IOB prima di scrivere...
    /// </summary>
    /// <param name="txt2log"></param>
    protected void lgError(string txt2log)
    {
      lg.Factory.Configuration.Variables["codIOB"] = "MAIN";
      lg.Error(txt2log);
    }
    #endregion

    #region gestione update

    /// <summary>
    /// URL stringa di UPDATE...
    /// </summary>
    protected string updateUrl
    {
      get
      {
        return string.Format("http://seriate.steamware.net:8083/SWS/MAPO/IOB-WIN/{0}/manifest.xml", branchName);
      }
    }
    /// <summary>
    /// IP del PC
    /// </summary>
    protected string currIP
    {
      get
      {
        string answ = "127.0.0.1";

        return answ;
      }
    }
    /// <summary>
    /// URL per segnalazione reboot...
    /// </summary>
    protected string urlReboot
    {
      get
      {
        string answ = "";
        try
        {
          answ = string.Format(@"http://{0}{1}{2}{3}&mac={4}", MPIP, MPURL, CMDREBO, utils.GetIP(), utils.GetMACAddress());
        }
        catch
        {
          answ = string.Format(@"http://{0}{1}{2}{3}", MPIP, MPURL, CMDREBO, utils.GetIP());
        }
        return answ;
      }
    }
    /// <summary>
    /// URL per chiedere quale sia la IOB da acquisire/gestire (se c'è...)
    /// </summary>
    protected string urlIob2call
    {
      get
      {
        string answ = "";
        try
        {
          answ = string.Format(@"http://{0}{1}{2}{3}", MPIP, MPURL, CMDIOB2CALL, utils.GetIP());
        }
        catch
        { }
        return answ;
      }
    }
    /// <summary>
    /// Richeista verifica update
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void mCheckUpdates_Click(object sender, EventArgs e)
    {
      // avvio controllo
      AutoUpdater.ShowSkipButton = false;
      AutoUpdater.ShowRemindLaterButton = false;
      AutoUpdater.RunUpdateAsAdmin = utils.CRB("AUpdAsAdm");
      AutoUpdater.Start(updateUrl);
    }

    #endregion

    #region init form

    public MainForm()
    {
      InitializeComponent();
      myInit();
    }

    protected void myInit()
    {
      DateTime adesso = DateTime.Now;
      formStartTime = adesso;
      lastComCheck = adesso.AddHours(-1);
      lblStatus.Text = "Loading";

      // fix icon!
      notifyIcon1.Text = string.Format("IOB-WIN | {0}", System.Reflection.Assembly.GetExecutingAssembly().GetName().Version);
      Icon = Icon.ExtractAssociatedIcon(utils.defIconFilePath);
      notifyIcon1.Icon = Icon.ExtractAssociatedIcon(utils.defIconFilePath);

      // fix versione!
      lblApp.Text = string.Format("{0}", ConfigurationManager.AppSettings.Get("appName"));
      lblVers.Text = string.Format(" v.{0}", System.Reflection.Assembly.GetExecutingAssembly().GetName().Version);


#if DEBUG
      // Setup the logging view for Sentinel - http://sentinel.codeplex.com
      var sentinelTarget = new NLogViewerTarget()
      {
        Name = "sentinel",
        Address = "udp://127.0.0.1:9999",
        IncludeNLogData = false
      };
      var sentinelRule = new LoggingRule("*", LogLevel.Trace, sentinelTarget);
      LogManager.Configuration.AddTarget("sentinel", sentinelTarget);
      LogManager.Configuration.LoggingRules.Add(sentinelRule);

#endif

      LogManager.ReconfigExistingLoggers();

      lg = LogManager.GetCurrentClassLogger();
      displayTaskAndLog("MainForm Starting");

      // se abilitato autoload conf leggo file corretto...
      if (utils.CRB("autoLoadConf"))
      {
        loadIniFile(utils.mainConfFilePath);
        lgInfo("INI LOADED");
        // avvio child come richiesto!
        startAdapters();
      }
      else
      {
        displayTaskAndLog("Waiting for config file selection");
      }

      displayTaskAndLog("Program Running");
      createTrayMenu();
      displayTaskAndLog("Tray Menu OK");

      // avvio minimizzato se richiesto
      if (utils.CRB("startMinimized"))
      {
        // imposto minimized se necessario!
        if (WindowState != FormWindowState.Minimized)
        {
          WindowState = FormWindowState.Minimized;
        }
        displayTaskAndLog("Minimized");
      }
      try
      {
        // segnalo reboot (programma)...
        utils.callUrl(urlReboot);
      }
      catch (Exception exc)
      {
        lgError(string.Format("MainForm myInit EXCEPTION in fase di chiamata URL di reboot:{0}{1}{2}", urlReboot, Environment.NewLine, exc));
      }
      displayTaskAndLog("Main Form OK");
    }
    /// <summary>
    /// Avvio gli adapters richeisti
    /// </summary>
    private void startAdapters()
    {
      // avvio child richiesti
      foreach (var item in IOB2START)
      {
        openChild(item);
      }
    }

    /// <summary>
    /// Carica file ini della configurazione richiesta
    /// </summary>
    /// <param name="iniConfFile"></param>
    private void loadIniFile(string iniConfFile)
    {
      displayTaskAndLog(string.Format("Loading iniConfFile: {0}", iniConfFile));

      IniFile fIni = new IniFile(iniConfFile);
      // salvo valori letti da INI file...
      branchName = fIni.ReadString("BRANCH", "NAME", "develop");
      MPIP = fIni.ReadString("SERVER", "MPIP", "ND");
      MPURL = fIni.ReadString("SERVER", "MPURL", "/MP/IO");
      CMDALIVE = fIni.ReadString("SERVER", "CMDALIVE", "/IOB");
      CMDREBO = fIni.ReadString("SERVER", "CMDREBO", "/IOB/sendRebootGateway?GWIP=");
      CMDIOB2CALL = fIni.ReadString("SERVER", "CMDIOB2CALL", "/IOB/getIob2call?GWIP=");
      MAXCNC= fIni.ReadInteger("IOB", "MAXCNC", 1);
      string STARTLIST = fIni.ReadString("IOB", "STARTLIST", "");
      if (STARTLIST != "")
      {
        IOB2START = new List<string>();
        string[] elenco = STARTLIST.Split(',');
        foreach (var item in elenco)
        {
          IOB2START.Add(item);
        }
      }
      // se NON sono in DEBUG faccio check update...
#if !(DEBUG)
      // avvio autoupdater...
      AutoUpdater.RunUpdateAsAdmin = utils.CRB("AUpdAsAdm");
      AutoUpdater.Start(updateUrl);
#endif
    }

    #endregion

    #region check comunicazione

    /// <summary>
    /// Visualizzazione stato di comunicazione attiva con PLC
    /// </summary>
    public bool commPlcActive
    {
      set
      {
        // se true --> comunica/verde, altrimenti grigio
        lblApp.ForeColor = value ? Color.SeaGreen : Color.Black;
        lblVers.ForeColor = value ? Color.SeaGreen : Color.DarkSlateGray;
        statusStrip1.Refresh();
      }
    }
    /// <summary>
    /// Effettua verifiche varie comunicazione verso PLC e verso server
    /// </summary>
    private void checkCom()
    {
      // eseguo update se è passato almeno comCheckTOut secondi da ultimo check...
      if (DateTime.Now.Subtract(lastComCheck).TotalSeconds > utils.CRI("comCheckTOut"))
      {
        lastComCheck = DateTime.Now;
        // conta quanti child form di adapter verso PLC siano aperti !!!FARE!!! chiedere con un metodo che siano ATTIVI e contare quello...
        int numPLC = this.MdiChildren.Count<Form>();

        // update stato!
        updateComStats(numPLC, testServer);
      }
    }
    /// <summary>
    /// Verifica il server: esiste IP, risponde a ping, risponde a pagina ALIVE
    /// </summary>
    protected bool testServer
    {
      get
      {
        bool answ = false;
        // check server: indirizzo esiste
        if (MPIP != "")
        {
          IPAddress address = IPAddress.Loopback;
          // check stato server (SOLO PING!)
          IPAddress.TryParse(MPIP, out address);
          if (address != IPAddress.Loopback)
          {
            answ = utils.pingAddress(address);
          }
        }
        return answ;
      }
    }
    #endregion

    #region gestione child form

    /// <summary>
    /// CHiude le finestre child attive
    /// </summary>
    protected void closeActiveChild()
    {
      if (this.HasChildren)
      {
        try
        {
          this.ActiveMdiChild.Close();
          this.LayoutMdi(MdiLayout.TileHorizontal);
        }
        catch
        { }
      }
    }
    /// <summary>
    /// Apre la finestra child con conf
    /// </summary>
    protected void openChild(string IOB)
    {
      // !!!FARE!!! x ora è finto... vanno aperti veri adapters
      if (IOB == null)
      {
        throw new ArgumentNullException(nameof(IOB));
      }

      AdapterForm child = new AdapterForm(IOB);
      child.MdiParent = this;
      child.Text = IOB;
      child.Show();
      child.Shown += Child_Shown;
      child.FormClosed += Child_FormClosed;
    }
    /// <summary>
    /// FIx finestre restanti post chiusura di una finestra...
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void Child_FormClosed(object sender, FormClosedEventArgs e)
    {
      this.LayoutMdi(MdiLayout.TileHorizontal);
    }

    /// <summary>
    /// Sistemazione finestre POST visualizzazione...
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void Child_Shown(object sender, EventArgs e)
    {
      this.LayoutMdi(MdiLayout.TileHorizontal);
    }

    private void closeChildToolStripMenuItem_Click(object sender, EventArgs e)
    {
      closeActiveChild();
    }

    private void openChildToolStripMenuItem_Click(object sender, EventArgs e)
    {
      openNewChild();
    }
    /// <summary>
    /// Effettua apertura di una nuova finestra CHILD
    /// </summary>
    private void openNewChild()
    {
      // IOB di default...
      string reqIOB = "";
      // richiede al server COSA aprire
      try
      {
        reqIOB = utils.callUrl(urlIob2call);
      }
      catch(Exception exc)
      {
        reqIOB = utils.CRS("defIOB");
      }
      if (reqIOB == "")
      {
        reqIOB = utils.CRS("defIOB");
      }
      // se non ottiene risposta apre la demo...
      openChild(reqIOB);
    }

    /// <summary>
    /// Chiusura applicazione
    /// </summary>
    private void closeAllChild()
    {
      // ferma tutti i child form...
      foreach (var ChildForm in this.MdiChildren)
      {
        try
        {
          ChildForm.Close();
        }
        catch
        { }
      }
    }

    #endregion

    #region gestione tray

    /// <summary>
    /// crea menù tray x applicazione
    /// </summary>
    private void createTrayMenu()
    {
      // Fix testi menù tray...
      trayMenu.Items.Clear();
      // SE permessa massimizzazione...
      if (utils.CRB("windowCanMax"))
      {
        trayMenu.Items.Add("Show IOB-WIN");
      }
      // se è permesso tray close...
      if (utils.CRB("trayClose"))
      {
        trayMenu.Items.Add("Close IOB-WIN");
      }
    }

    /// <summary>
    /// doppio click su tray icon
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void notifyIcon1_DoubleClick(object sender, EventArgs e)
    {
      // SOLO SE PERMESSO mostrare full...
      if (utils.CRB("windowCanMax"))
      {
        Show();
        WindowState = FormWindowState.Normal;
      }
    }
    /// <summary>
    /// Verifica stato windows (minimized/normal) e visibilità con tray...
    /// </summary>
    private void checkFormVisibility()
    {
      // se non può massimizzare imposto COMUNQUE a minimized...
      if (!utils.CRB("windowCanMax"))
      {
        WindowState = FormWindowState.Minimized;
      }
      // controllo cosa devo mostrare...
      if (WindowState == FormWindowState.Minimized)
      {
        notifyIcon1.Visible = false;
        sendToTray();
      }
      else
      {
        notifyIcon1.Visible = false;
      }
      // fix child!
      this.LayoutMdi(MdiLayout.TileHorizontal);
    }
    /// <summary>
    /// Gestisce "andata nel tray" della form
    /// </summary>
    private void sendToTray()
    {
      if (!notifyIcon1.Visible)
      {
        notifyIcon1.BalloonTipTitle = utils.CRS("appName");
        notifyIcon1.BalloonTipText = string.Format("{0} running on tray", utils.CRS("appName"));
        notifyIcon1.Visible = true;
        notifyIcon1.ShowBalloonTip(100);
      }
      Hide();
    }
    /// <summary>
    /// click su menù contestuale in tray
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void trayMenu_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
    {
      if (e.ClickedItem.Text.StartsWith("Close"))
      {
        // stop child adapters...
        closeAllChild();
        // chiudo!
        Close();
      }
      else if (e.ClickedItem.Text.StartsWith("Show"))
      {
        if (utils.CRB("windowCanMax"))
        {
          Show();
          WindowState = FormWindowState.Normal;
        }
      }
    }

    #endregion

    #region gestione FORM principale

    /// <summary>
    /// timer principale
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void MainTimer_Tick(object sender, EventArgs e)
    {
      // inizio a riportare che sto funzionando..
      advProgBar();
      checkCom();
    }

    /// <summary>
    /// Avanza la barra di stato...
    /// </summary>
    public void advProgBar()
    {
      try
      {
        // aggiorno runtime...
        TimeSpan uptime = DateTime.Now.Subtract(formStartTime);
        tslRunTime.Text = string.Format("Running: {0}gg {1:00}:{2:00}:{3:00}", uptime.Days, uptime.Hours, uptime.Minutes, uptime.Seconds);
        // se è arrivato a MAX resetto...
        MainProgrBar.PerformStep();
        if (MainProgrBar.Value >= MainProgrBar.Maximum)
        {
          MainProgrBar.Value = 0;
        }
        MainProgrBar.Invalidate();
      }
      catch
      { }
    }
    /// <summary>
    /// evento chiusura
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
    {
      closeAllChild();
    }
    /// <summary>
    /// evento visualizzazione
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void MainForm_Shown(object sender, EventArgs e)
    {
      // avvio minimizzato se richiesto
      if (utils.CRB("startMinimized"))
      {
        // controllo e mando a tray...
        sendToTray();
      }
      displayTaskAndLog("Main Form SHOWN");
    }
    /// <summary>
    /// evento resize
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void MainForm_Resize(object sender, EventArgs e)
    {
      checkFormVisibility();
    }

    #endregion

  }
}