using System;

using UnityEngine;

namespace Framework.Input.States {

  /// <summary>Gives an input action a default key binding</summary>
  [AttributeUsage(AttributeTargets.Field | AttributeTargets.Property, AllowMultiple = true)]
  public class DefaultKeyAttribute : Attribute {

    /// <summary>Initializes a new default key provider</summary>
    /// <param name="defaultKey">Key that will be bound to the action by default</param>
    public DefaultKeyAttribute(KeyCode defaultKey) {
      this.positiveDefaultKey = defaultKey;
    }

    /// <summary>Initializes a new default key provider</summary>
    /// <param name="defaultKey">Key that will be bound to the action by default</param>
    /// <param name="negative">Whether to bind the key to the negative action</param>
    public DefaultKeyAttribute(KeyCode defaultKey, bool negative) {
      if(negative) {
        this.negativeDefaultKey = defaultKey;
      } else {
        this.positiveDefaultKey = defaultKey;
      }
    }

    /// <summary>Initializes a new default key provider</summary>
    /// <param name="negativeDefaultKey">
    ///   Key that will be bound to the negative side of the action by default
    /// </param>
    /// <param name="positiveDefaultKey">
    ///   Key that will be bound to the positive side of the action by default
    /// </param>
    public DefaultKeyAttribute(KeyCode negativeDefaultKey, KeyCode positiveDefaultKey) {
      this.negativeDefaultKey = negativeDefaultKey;
      this.positiveDefaultKey = positiveDefaultKey;
    }

    /// <summary>Default key that will be bound to the negative side of the axis</summary>
    public KeyCode NegativeDefaultKey {
      get { return this.negativeDefaultKey; }
    }

    /// <summary>Default key that will be bound to the positive side of the axis</summary>
    public KeyCode PositiveDefaultKey {
      get { return this.positiveDefaultKey; }
    }

    /// <summary>Default key that will be bound to the negative side of the axis</summary>
    private KeyCode negativeDefaultKey;
    /// <summary>Default key that will be bound to the positive side of the axis</summary>
    private KeyCode positiveDefaultKey;

  }

} // namespace Framework.Input.States