using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace BansheeEngine
{
	/** @addtogroup Animation
	 *  @{
	 */

	/// <summary>
	/// Handles animation playback. Takes one or multiple animation clips as input and evaluates them every animation update 
	/// tick depending on set properties. The evaluated data is used by the core thread for skeletal animation, by the sim 
	/// thread for updating attached scene objects and bones (if skeleton is attached), or the data is made available for 
	/// manual queries in the case of generic animation.
	/// </summary>
	public partial class Animation : Component
	{
		private Animation(bool __dummy0) { }
		protected Animation() { }

		/// <summary>
		/// Determines the default clip to play as soon as the component is enabled. If more control over playing clips is needed 
		/// use the play(), blend() and crossFade() methods to queue clips for playback manually, and setState() method for 
		/// modify their states individually.
		/// </summary>
		[ShowInInspector]
		public AnimationClip DefaultClip
		{
			get { return Internal_getDefaultClip(mCachedPtr); }
			set { Internal_setDefaultClip(mCachedPtr, value); }
		}

		/// <summary>
		/// Determines the wrap mode for all active animations. Wrap mode determines what happens when animation reaches the  
		/// first or last frame.
		/// </summary>
		[ShowInInspector]
		public AnimWrapMode WrapMode
		{
			get { return Internal_getWrapMode(mCachedPtr); }
			set { Internal_setWrapMode(mCachedPtr, value); }
		}

		/// <summary>
		/// Determines the speed for all animations. The default value is 1.0f. Use negative values to play-back in reverse.
		/// </summary>
		[ShowInInspector]
		public float Speed
		{
			get { return Internal_getSpeed(mCachedPtr); }
			set { Internal_setSpeed(mCachedPtr, value); }
		}

		/// <summary>Checks if any animation clips are currently playing.</summary>
		[ShowInInspector]
		public bool IsPlaying
		{
			get { return Internal_isPlaying(mCachedPtr); }
		}

		/// <summary>
		/// Determines bounds that will be used for animation and mesh culling. Only relevant if setUseBounds() is set to true.
		/// </summary>
		[ShowInInspector]
		public AABox Bounds
		{
			get
			{
				AABox temp;
				Internal_getBounds(mCachedPtr, out temp);
				return temp;
			}
			set { Internal_setBounds(mCachedPtr, ref value); }
		}

		/// <summary>
		/// Determines should animation bounds be used for visibility determination (culling). If false the bounds of the mesh 
		/// attached to the relevant CRenderable component will be used instead.
		/// </summary>
		[ShowInInspector]
		public bool UseBounds
		{
			get { return Internal_getUseBounds(mCachedPtr); }
			set { Internal_setUseBounds(mCachedPtr, value); }
		}

		/// <summary>
		/// Enables or disables culling of the animation when out of view. Culled animation will not be evaluated.
		/// </summary>
		[ShowInInspector]
		public bool Cull
		{
			get { return Internal_getEnableCull(mCachedPtr); }
			set { Internal_setEnableCull(mCachedPtr, value); }
		}

		/// <summary>
		/// Triggered when the list of properties animated via generic animation curves needs to be recreated (script only).
		/// </summary>
		partial void RebuildFloatProperties(AnimationClip p0);

		/// <summary>
		/// Triggered when generic animation curves values need be applied to the properties they effect (script only).
		/// </summary>
		partial void _UpdateFloatProperties();

		/// <summary>Triggers a callback in script code when animation event is triggered (script only).</summary>
		partial void EventTriggered(AnimationClip p0, string p1);

		/// <summary>Plays the specified animation clip.</summary>
		/// <param name="clip">Clip to play.</param>
		public void Play(AnimationClip clip)
		{
			Internal_play(mCachedPtr, clip);
		}

		/// <summary>
		/// Plays the specified animation clip on top of the animation currently playing in the main layer. Multiple such clips 
		/// can be playing at once, as long as you ensure each is given its own layer. Each animation can also have a weight that 
		/// determines how much it influences the main animation.
		/// </summary>
		/// <param name="clip">Clip to additively blend. Must contain additive animation curves.</param>
		/// <param name="weight">
		/// Determines how much of an effect will the blended animation have on the final output. In range [0, 1].
		/// </param>
		/// <param name="fadeLength">
		/// Applies the blend over a specified time period, increasing the weight as the time passes. Set to zero to blend 
		/// immediately. In seconds.
		/// </param>
		/// <param name="layer">
		/// Layer to play the clip in. Multiple additive clips can be playing at once in separate layers and each layer has its 
		/// own weight.
		/// </param>
		public void BlendAdditive(AnimationClip clip, float weight, float fadeLength = 0f, uint layer = 0)
		{
			Internal_blendAdditive(mCachedPtr, clip, weight, fadeLength, layer);
		}

		/// <summary>
		/// Blend multiple animation clips between each other using linear interpolation. Unlike normal animations these 
		/// animations are not advanced with the progress of time, and is instead expected the user manually changes the 
		/// <paramref name="t"/> parameter.
		/// </summary>
		/// <param name="info">
		/// Information about the clips to blend. Clip positions must be sorted from lowest to highest.
		/// </param>
		/// <param name="t">
		/// Parameter that controls the blending. Range depends on the positions of the provided animation clips.
		/// </param>
		public void Blend1D(Blend1DInfo info, float t)
		{
			Internal_blend1D(mCachedPtr, ref info, t);
		}

		/// <summary>
		/// Blend four animation clips between each other using bilinear interpolation. Unlike normal animations these animations 
		/// are not advanced with the progress of time, and is instead expected the user manually changes the <paramref 
		/// name="t"/> parameter.
		/// </summary>
		/// <param name="info">Information about the clips to blend.</param>
		/// <param name="t">
		/// Parameter that controls the blending, in range [(0, 0), (1, 1)]. t = (0, 0) means top left animation has full 
		/// influence, t = (1, 0) means top right animation has full influence, t = (0, 1) means bottom left animation has full 
		/// influence, t = (1, 1) means bottom right animation has full influence.
		/// </param>
		public void Blend2D(Blend2DInfo info, Vector2 t)
		{
			Internal_blend2D(mCachedPtr, ref info, ref t);
		}

		/// <summary>
		/// Fades the specified animation clip in, while fading other playing animation out, over the specified time period.
		/// </summary>
		/// <param name="clip">Clip to fade in.</param>
		/// <param name="fadeLength">Determines the time period over which the fade occurs. In seconds.</param>
		public void CrossFade(AnimationClip clip, float fadeLength)
		{
			Internal_crossFade(mCachedPtr, clip, fadeLength);
		}

		/// <summary>
		/// Samples an animation clip at the specified time, displaying only that particular frame without further playback.
		/// </summary>
		/// <param name="clip">Animation clip to sample.</param>
		/// <param name="time">Time to sample the clip at.</param>
		public void Sample(AnimationClip clip, float time)
		{
			Internal_sample(mCachedPtr, clip, time);
		}

		/// <summary>
		/// Stops playing all animations on the provided layer. Specify -1 to stop animation on the main layer  (non-additive 
		/// animations).
		/// </summary>
		public void Stop(uint layer)
		{
			Internal_stop(mCachedPtr, layer);
		}

		/// <summary>Stops playing all animations.</summary>
		public void StopAll()
		{
			Internal_stopAll(mCachedPtr);
		}

		/// <summary>Retrieves detailed information about a currently playing animation clip.</summary>
		/// <param name="clip">Clip to retrieve the information for.</param>
		/// <param name="state">
		/// Animation clip state containing the requested information. Only valid if the method returns true.
		/// </param>
		/// <returns>True if the state was found (animation clip is playing), false otherwise.</returns>
		public bool GetState(AnimationClip clip, out AnimationClipState state)
		{
			return Internal_getState(mCachedPtr, clip, out state);
		}

		/// <summary>
		/// Changes the state of a playing animation clip. If animation clip is not currently playing the playback is started for 
		/// the clip.
		/// </summary>
		/// <param name="clip">Clip to change the state for.</param>
		/// <param name="state">New state of the animation (e.g. changing the time for seeking).</param>
		public void SetState(AnimationClip clip, AnimationClipState state)
		{
			Internal_setState(mCachedPtr, clip, ref state);
		}

		/// <summary>
		/// Changes a weight of a single morph channel, determining how much of it to apply on top of the base mesh.
		/// </summary>
		/// <param name="name">
		/// Name of the morph channel to modify. This depends on the mesh the animation is currently animating.
		/// </param>
		/// <param name="weight">Weight that determines how much of the channel to apply to the mesh, in range [0, 1].</param>
		public void SetMorphChannelWeight(string name, float weight)
		{
			Internal_setMorphChannelWeight(mCachedPtr, name, weight);
		}

		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setDefaultClip(IntPtr thisPtr, AnimationClip clip);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern AnimationClip Internal_getDefaultClip(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setWrapMode(IntPtr thisPtr, AnimWrapMode wrapMode);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern AnimWrapMode Internal_getWrapMode(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setSpeed(IntPtr thisPtr, float speed);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern float Internal_getSpeed(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_play(IntPtr thisPtr, AnimationClip clip);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_blendAdditive(IntPtr thisPtr, AnimationClip clip, float weight, float fadeLength, uint layer);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_blend1D(IntPtr thisPtr, ref Blend1DInfo info, float t);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_blend2D(IntPtr thisPtr, ref Blend2DInfo info, ref Vector2 t);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_crossFade(IntPtr thisPtr, AnimationClip clip, float fadeLength);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_sample(IntPtr thisPtr, AnimationClip clip, float time);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_stop(IntPtr thisPtr, uint layer);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_stopAll(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern bool Internal_isPlaying(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern bool Internal_getState(IntPtr thisPtr, AnimationClip clip, out AnimationClipState state);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setState(IntPtr thisPtr, AnimationClip clip, ref AnimationClipState state);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setMorphChannelWeight(IntPtr thisPtr, string name, float weight);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setBounds(IntPtr thisPtr, ref AABox bounds);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_getBounds(IntPtr thisPtr, out AABox __output);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setUseBounds(IntPtr thisPtr, bool enable);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern bool Internal_getUseBounds(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal_setEnableCull(IntPtr thisPtr, bool enable);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern bool Internal_getEnableCull(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern uint Internal_getNumClips(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern AnimationClip Internal_getClip(IntPtr thisPtr, uint idx);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern void Internal__refreshClipMappings(IntPtr thisPtr);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern bool Internal__getGenericCurveValue(IntPtr thisPtr, uint curveIdx, out float value);
		[MethodImpl(MethodImplOptions.InternalCall)]
		private static extern bool Internal__togglePreviewMode(IntPtr thisPtr, bool enabled);
		private void Internal__scriptRebuildFloatProperties(AnimationClip p0)
		{
			RebuildFloatProperties(p0);
		}
		private void Internal__scriptUpdateFloatProperties()
		{
			_UpdateFloatProperties();
		}
		private void Internal__scriptOnEventTriggered(AnimationClip p0, string p1)
		{
			EventTriggered(p0, p1);
		}
	}

	/** @} */
}