// Author: Daniele Giardini - http://www.demigiant.com
// Created: 2014/09/04 17:55
// 
// License Copyright (c) Daniele Giardini.
// This work is subject to the terms at http://dotween.demigiant.com/license.php

using DG.Tweening.Core;
using UnityEngine;

namespace DG.Tweening
{
    /// <summary>
    /// Methods that extend known Unity objects and allow to directly create and control tweens from their instances.
    /// These, as all DOTween43 methods, require Unity 4.3 or later.
    /// </summary>
    public static class ShortcutExtensions
    {
        #region SpriteRenderer

        /// <summary>Tweens a SpriteRenderer's color to the given value.
        /// Also stores the spriteRenderer as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end value to reach</param><param name="duration">The duration of the tween</param>
        public static Tweener DOColor(this SpriteRenderer target, Color endValue, float duration)
        {
            return DOTween.To(() => target.color, x => target.color = x, endValue, duration).SetTarget(target);
        }

        /// <summary>Tweens a Material's alpha color to the given value.
        /// Also stores the spriteRenderer as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end value to reach</param><param name="duration">The duration of the tween</param>
        public static Tweener DOFade(this SpriteRenderer target, float endValue, float duration)
        {
            return DOTween.ToAlpha(() => target.color, x => target.color = x, endValue, duration)
                .SetTarget(target);
        }

        #endregion

        #region Rigidbody2D Shortcuts

        /// <summary>Tweens a Rigidbody2D's position to the given value.
        /// Also stores the Rigidbody2D as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end value to reach</param><param name="duration">The duration of the tween</param>
        /// <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
        public static Tweener DOMove(this Rigidbody2D target, Vector2 endValue, float duration, bool snapping = false)
        {
#if COMPATIBLE
            return DOTween.To(() => target.position, x=> target.MovePosition(x.value), endValue, duration)
#else
            return DOTween.To(() => target.position, target.MovePosition, endValue, duration)
#endif
                .SetOptions(snapping).SetTarget(target);
        }

        /// <summary>Tweens a Rigidbody2D's X position to the given value.
        /// Also stores the Rigidbody2D as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end value to reach</param><param name="duration">The duration of the tween</param>
        /// <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
        public static Tweener DOMoveX(this Rigidbody2D target, float endValue, float duration, bool snapping = false)
        {
#if COMPATIBLE
            return DOTween.To(() => target.position, x => target.MovePosition(x.value), new Vector2(endValue, 0), duration)
#else
            return DOTween.To(() => target.position, target.MovePosition, new Vector2(endValue, 0), duration)
#endif
                .SetOptions(AxisConstraint.X, snapping).SetTarget(target);
        }

        /// <summary>Tweens a Rigidbody2D's Y position to the given value.
        /// Also stores the Rigidbody2D as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end value to reach</param><param name="duration">The duration of the tween</param>
        /// <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
        public static Tweener DOMoveY(this Rigidbody2D target, float endValue, float duration, bool snapping = false)
        {
#if COMPATIBLE
            return DOTween.To(() => target.position, x => target.MovePosition(x.value), new Vector2(0, endValue), duration)
#else
            return DOTween.To(() => target.position, target.MovePosition, new Vector2(0, endValue), duration)
#endif
                .SetOptions(AxisConstraint.Y, snapping).SetTarget(target);
        }

        /// <summary>Tweens a Rigidbody2D's rotation to the given value.
        /// Also stores the Rigidbody2D as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end value to reach</param><param name="duration">The duration of the tween</param>
        public static Tweener DORotate(this Rigidbody2D target, float endValue, float duration)
        {
            return DOTween.To(() => target.rotation, target.MoveRotation, endValue, duration)
                .SetTarget(target);
        }

        #endregion

        #region Blendables

        #region SpriteRenderer

        /// <summary>Tweens a SpriteRenderer's color to the given value,
        /// in a way that allows other DOBlendableColor tweens to work together on the same target,
        /// instead than fight each other as multiple DOColor would do.
        /// Also stores the SpriteRenderer as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The value to tween to</param><param name="duration">The duration of the tween</param>
        public static Tweener DOBlendableColor(this SpriteRenderer target, Color endValue, float duration)
        {
            endValue = endValue - target.color;
            Color to = new Color(0, 0, 0, 0);
            return DOTween.To(() => to, x => {
#if COMPATIBLE
                Color diff = x.value - to;
#else
                Color diff = x - to;
#endif
                to = x;
                target.color += diff;
            }, endValue, duration)
                .Blendable().SetTarget(target);
        }

        #endregion

        #endregion
    }
}