using UnityEngine;
using System.Collections;
using System;

public class PlayerInput : MonoBehaviour
{
  public struct SimpleTouch
  {
    public Vector2 StartTouchLocation;
    public Vector2 CurrentTouchLocation;
    public DateTime StartTime;
    public TouchPhase Phase;
  }

  public float SwipeTime;
  public float SwipeDistance;

  private SimpleTouch ActiveTouch;
  private Touch DeviceTouch;

  private void CalculateTouchInput(SimpleTouch CurrentTouch)
  {
    Vector2 touchDirection  =
    (CurrentTouch.CurrentTouchLocation - 
    CurrentTouch.StartTouchLocation).normalized;

    float touchDistance = 
    (CurrentTouch.StartTouchLocation - 
    CurrentTouch.CurrentTouchLocation).magnitude;

    TimeSpan timeGap = 
    System.DateTime.Now - CurrentTouch.StartTime;

    double touchTimeSpan = 
    timeGap.TotalSeconds;

    string touchType =
    ( touchDistance > SwipeDistance 
    && touchTimeSpan > SwipeTime ) ? "Swipe" : "Tap";

    print(touchType);
  }

  /* Use this for initialization */
  void Start ()
  {
    ActiveTouch.Phase = TouchPhase.Canceled;
  }

  /* Update is called once per frame */
  void Update () 
  {
    if (Application.isEditor)
    {
      if (Input.GetMouseButton(0))
      {
        if (ActiveTouch.Phase == TouchPhase.Canceled)
        {
          ActiveTouch.CurrentTouchLocation = Input.mousePosition;
          ActiveTouch.StartTouchLocation = Input.mousePosition;
          ActiveTouch.StartTime = System.DateTime.Now;
          ActiveTouch.Phase = TouchPhase.Began;
        }
        else
        {
          ActiveTouch.CurrentTouchLocation = Input.mousePosition;
        }
      }
      else
      {
        if (ActiveTouch.Phase == TouchPhase.Began)
        {
          CalculateTouchInput( ActiveTouch );
          ActiveTouch.Phase = TouchPhase.Canceled;
        }
      }
    }
    else
    {
      if (Input.touches.Length > 0)
      {
        DeviceTouch = Input.GetTouch(0);
        if (ActiveTouch.Phase == TouchPhase.Canceled)
        {
          ActiveTouch.Phase = DeviceTouch.phase;
          ActiveTouch.StartTime = System.DateTime.Now;

          ActiveTouch.StartTouchLocation =
          DeviceTouch.position;
          ActiveTouch.CurrentTouchLocation = 
          DeviceTouch.position;
        }
        else
        {
          ActiveTouch.CurrentTouchLocation =
          DeviceTouch.position;
        }
      }
      else
      {
        if (ActiveTouch.Phase != TouchPhase.Canceled)
        {
          CalculateTouchInput( ActiveTouch );
          ActiveTouch.Phase = TouchPhase.Canceled;
        }
      }
    }
  }
}