namespace UIWidgets
{
	using System;
	using UnityEngine;
	using UnityEngine.Events;
	using UnityEngine.UI;

	/// <summary>
	/// Proxy for InputField.
	/// </summary>
	public class InputFieldProxy : IInputFieldProxy
	{
		/// <summary>
		/// The InputField.
		/// </summary>
		readonly InputField inputField;

		/// <summary>
		/// Initializes a new instance of the <see cref="UIWidgets.InputFieldProxy"/> class.
		/// </summary>
		/// <param name="input">Input.</param>
		public InputFieldProxy(InputField input)
		{
			inputField = input;
		}

		#region IInputFieldProxy implementation

		/// <summary>
		/// The current value of the input field.
		/// </summary>
		/// <value>The text.</value>
		public string text
		{
			get
			{
				return inputField.text;
			}

			set
			{
				inputField.text = value;
			}
		}

		/// <summary>
		/// The Unity Event to call when edit.
		/// </summary>
		/// <value>The OnValueChange.</value>
		public UnityEvent<string> onValueChanged
		{
			get
			{
				#if UNITY_5_3 || UNITY_5_3_OR_NEWER
				return inputField.onValueChanged;
				#else
				return inputField.onValueChange;
				#endif
			}
		}

		/// <summary>
		/// The Unity Event to call when editing has ended.
		/// </summary>
		/// <value>The OnEndEdit.</value>
		public UnityEvent<string> onEndEdit
		{
			get
			{
				return inputField.onEndEdit;
			}
		}

		/// <summary>
		/// Current InputField caret position (also selection tail).
		/// </summary>
		/// <value>The caret position.</value>
		public int caretPosition
		{
			get
			{
				#if UNITY_5_1 || UNITY_5_2 || UNITY_5_3 || UNITY_5_3_OR_NEWER
				return inputField.caretPosition;
				#else
				return inputField.text.Length;
				#endif
			}

			set
			{
				#if UNITY_5_1 || UNITY_5_2 || UNITY_5_3 || UNITY_5_3_OR_NEWER
				inputField.caretPosition = value;
				#else
				// inputField.ActivateInputField();
				#endif
			}
		}

		/// <summary>
		/// Is the InputField eligible for interaction (excludes canvas groups).
		/// </summary>
		/// <value>true</value>
		/// <c>false</c>
		public bool interactable
		{
			get
			{
				return inputField.interactable;
			}

			set
			{
				inputField.interactable = value;
			}
		}

		/// <summary>
		/// Determines whether InputField instance is null.
		/// </summary>
		/// <returns>true</returns>
		/// <c>false</c>
		public bool IsNull()
		{
			return inputField == null;
		}

		/// <summary>
		/// Gets the gameobject.
		/// </summary>
		/// <value>The gameobject.</value>
		public GameObject gameObject
		{
			get
			{
				return (inputField != null) ? inputField.gameObject : null;
			}
		}

		/// <summary>
		/// Text component.
		/// </summary>
		public Graphic textComponent
		{
			get
			{
				return inputField.textComponent;
			}

			set
			{
				inputField.textComponent = value as Text;
			}
		}

		/// <summary>
		/// Placeholder.
		/// </summary>
		public Graphic placeholder
		{
			get
			{
				return inputField.placeholder;
			}

			set
			{
				inputField.placeholder = value;
			}
		}

		/// <summary>
		/// If the proxy was canceled and will revert back to the original text.
		/// </summary>
		public bool wasCanceled
		{
			get
			{
				return inputField.wasCanceled;
			}
		}

		/// <summary>
		/// Determines whether this lineType is LineType.MultiLineNewline.
		/// </summary>
		/// <returns>true</returns>
		/// <c>false</c>
		public bool IsMultiLineNewline()
		{
			return inputField.lineType == InputField.LineType.MultiLineNewline;
		}

		/// <summary>
		/// Function to activate the InputField to begin processing Events.
		/// </summary>
		public void ActivateInputField()
		{
			inputField.ActivateInputField();
		}

#if UNITY_4_6 || UNITY_4_7 || UNITY_5_0
		/// <summary>
		/// Move caret to end.
		/// </summary>
		public void MoveToEnd()
		{
			inputField.MoveTextStart(false);
			inputField.MoveTextEnd(false);
		}
#endif

		/// <summary>
		/// Set focus to InputField.
		/// </summary>
		public void Focus()
		{
			ActivateInputField();
			inputField.Select();
		}

		/// <summary>
		/// Set focus to InputField.
		/// </summary>
		public void Select()
		{
			ActivateInputField();
			inputField.Select();
		}
		#endregion
	}
}