using System;
using System.Collections.Generic;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using uDrawLib;
using Xbox360USB;

namespace uDrawTablet
{
  public class TabletConnection
  {
    #region Declarations

    private IInputDevice _tablet;
    private TabletSettings _settings;
    public WirelessReceiver Receiver { get; set; }
    public int ReceiverIndex { get; set; }
    public TabletButtonState LastButtonState { get; set; }
    public TabletDPadState LastDPadState { get; set; }
    public bool LastPressure { get; set; }
    public Point? LastPressurePoint { get; set; }
    public int VerticalDelta { get; set; }
    public int HorizontalDelta { get; set; }
    public Screen CurrentDisplay { get; set; }

    #endregion

    #region Public Properties

    public TabletSettings Settings
    {
      get
      {
        return _settings;
      }
      set
      {
        _settings = value;

        _CacheOtherSettings();
      }
    }

    public IInputDevice Tablet
    {
      get
      {
        return _tablet;
      }
      set
      {
        //Unwire old events
        if (_tablet != null)
        {
          _tablet.ButtonStateChanged -= _tablet_ButtonStateChanged;
          _tablet.DPadStateChanged -= _tablet_DPadStateChanged;

          var dev = _tablet as Xbox360InputDevice;
          if (dev != null)
          {
            dev.ChatpadKeyStateChanged -= _tablet_ChatpadKeyStateChanged;
            dev.ShiftPressed -= _tablet_ShiftPressed;
            dev.PeoplePressed -= _tablet_PeoplePressed;
          }
        }

        //Set value
        _tablet = value;

        //Wire new events
        if (_tablet != null)
        {
          LastButtonState = (TabletButtonState)_tablet.ButtonState.Clone();
          LastDPadState = (TabletDPadState)_tablet.DPadState.Clone();
          _tablet.ButtonStateChanged += _tablet_ButtonStateChanged;
          _tablet.DPadStateChanged += _tablet_DPadStateChanged;

          var dev = _tablet as Xbox360InputDevice;
          if (dev != null)
          {
            dev.ChatpadKeyStateChanged += _tablet_ChatpadKeyStateChanged;
            dev.ShiftPressed += _tablet_ShiftPressed;
            dev.PeoplePressed += _tablet_PeoplePressed;
          }
        }
      }
    }

    #endregion

    #region Events

    public event EventHandler<EventArgs> ButtonStateChanged;
    public event EventHandler<EventArgs> DPadStateChanged;
    public event EventHandler<ChatpadKeyStateEventArgs> ChatpadKeyStateChanged;
    public event EventHandler<Xbox360DeviceEventArgs> ShiftPressed;
    public event EventHandler<Xbox360DeviceEventArgs> PeoplePressed;

    #endregion

    #region Constructors/Teardown

    public TabletConnection(IInputDevice tablet)
    {
      Tablet = tablet;

      Settings = new TabletSettings();
    }

    public TabletConnection(IInputDevice tablet, WirelessReceiver receiver, int index)
    {
      Tablet = tablet;
      Receiver = receiver;
      ReceiverIndex = index;

      Settings = new TabletSettings();
    }

    #endregion

    #region Event Handlers

    private void _tablet_ButtonStateChanged(object sender, EventArgs e)
    {
      if (ButtonStateChanged != null)
        ButtonStateChanged(this, e);

      LastButtonState = (TabletButtonState)((IInputDevice)sender).ButtonState.Clone();
    }

    private void _tablet_DPadStateChanged(object sender, EventArgs e)
    {
      if (DPadStateChanged != null)
        DPadStateChanged(this, e);

      LastDPadState = (TabletDPadState)((IInputDevice)sender).DPadState.Clone();
    }

    private void _tablet_ChatpadKeyStateChanged(object sender, ChatpadKeyStateEventArgs e)
    {
      if (ChatpadKeyStateChanged != null)
        ChatpadKeyStateChanged(this, e);
    }

    private void _tablet_ShiftPressed(object sender, Xbox360DeviceEventArgs e)
    {
      if (ShiftPressed != null)
        ShiftPressed(this, e);
    }

    private void _tablet_PeoplePressed(object sender, Xbox360DeviceEventArgs e)
    {
      if (PeoplePressed != null)
        PeoplePressed(this, e);
    }

    #endregion

    #region Local Methods

    private void _CacheOtherSettings()
    {
      //Get the current screen
      this.CurrentDisplay = null;
      foreach (var screen in Screen.AllScreens)
      {
        if (screen.DeviceName == Settings.CurrentDisplay)
        {
          this.CurrentDisplay = screen;
          break;
        }
      }
      if (this.CurrentDisplay == null)
        this.CurrentDisplay = Screen.PrimaryScreen;
    }

    #endregion
  }
}