// Author: Daniele Giardini - http://www.demigiant.com
// Created: 2014/09/29 11:53
// 
// License Copyright (c) Daniele Giardini.
// This work is subject to the terms at http://dotween.demigiant.com/license.php

using DG.Tweening.Core;
using DG.Tweening.Core.Enums;
using UnityEngine;
using UnityEngine.UI;

namespace DG.Tweening
{
    /// <summary>
    /// Methods that extend known Unity objects and allow to directly create and control tweens from their instances.
    /// These, as all DOTween46 methods, require Unity 4.6 or later.
    /// </summary>
    public static class ShortcutExtensions46
    {
        #region Unity UI

        #region CanvasGroup

        /// <summary>Tweens a CanvasGroup's alpha color to the given value.
        /// Also stores the canvasGroup 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 CanvasGroup target, float endValue, float duration)
        {
            return DOTween.To(() => target.alpha, x => target.alpha = x, endValue, duration)
                .SetTarget(target);
        }

        #endregion

        #region Graphic

        /// <summary>Tweens an Graphic's color to the given value.
        /// Also stores the image 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 Graphic target, Color endValue, float duration)
        {
            return DOTween.To(() => target.color, x => target.color = x, endValue, duration).SetTarget(target);
        }

        /// <summary>Tweens an Graphic's alpha color to the given value.
        /// Also stores the image 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 Graphic target, float endValue, float duration)
        {
            return DOTween.ToAlpha(() => target.color, x => target.color = x, endValue, duration)
                .SetTarget(target);
        }

        #endregion

        #region Image

        /// <summary>Tweens an Image's color to the given value.
        /// Also stores the image 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 Image target, Color endValue, float duration)
        {
            return DOTween.To(() => target.color, x => target.color = x, endValue, duration).SetTarget(target);
        }

        /// <summary>Tweens an Image's alpha color to the given value.
        /// Also stores the image 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 Image target, float endValue, float duration)
        {
            return DOTween.ToAlpha(() => target.color, x => target.color = x, endValue, duration)
                .SetTarget(target);
        }

        /// <summary>Tweens an Image's fillAmount to the given value.
        /// Also stores the image as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end value to reach (0 to 1)</param><param name="duration">The duration of the tween</param>
        public static Tweener DOFillAmount(this Image target, float endValue, float duration)
        {
            if (endValue > 1) endValue = 1;
            else if (endValue < 0) endValue = 0;
            return DOTween.To(() => target.fillAmount, x => target.fillAmount = x, endValue, duration)
                .SetTarget(target);
        }

        #endregion

        #region LayoutElement

        /// <summary>Tweens an LayoutElement's flexibleWidth/Height to the given value.
        /// Also stores the LayoutElement 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 DOFlexibleSize(this LayoutElement target, Vector2 endValue, float duration, bool snapping = false)
        {
            return DOTween.To(() => new Vector2(target.flexibleWidth, target.flexibleHeight), x => {
#if COMPATIBLE
                    target.flexibleWidth = x.value.x;
                    target.flexibleHeight = x.value.y;
#else
                    target.flexibleWidth = x.x;
                    target.flexibleHeight = x.y;
#endif
                }, endValue, duration)
                .SetOptions(snapping).SetTarget(target);
        }

        /// <summary>Tweens an LayoutElement's minWidth/Height to the given value.
        /// Also stores the LayoutElement 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 DOMinSize(this LayoutElement target, Vector2 endValue, float duration, bool snapping = false)
        {
            return DOTween.To(() => new Vector2(target.minWidth, target.minHeight), x => {
#if COMPATIBLE
                target.minWidth = x.value.x;
                target.minHeight = x.value.y;
#else
                target.minWidth = x.x;
                target.minHeight = x.y;
#endif
            }, endValue, duration)
                .SetOptions(snapping).SetTarget(target);
        }

        /// <summary>Tweens an LayoutElement's preferredWidth/Height to the given value.
        /// Also stores the LayoutElement 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 DOPreferredSize(this LayoutElement target, Vector2 endValue, float duration, bool snapping = false)
        {
            return DOTween.To(() => new Vector2(target.preferredWidth, target.preferredHeight), x => {
#if COMPATIBLE
                target.preferredWidth = x.value.x;
                target.preferredHeight = x.value.y;
#else
                target.preferredWidth = x.x;
                target.preferredHeight = x.y;
#endif
            }, endValue, duration)
                .SetOptions(snapping).SetTarget(target);
        }

        #endregion

        #region Outline

        /// <summary>Tweens a Outline's effectColor to the given value.
        /// Also stores the Outline 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 Outline target, Color endValue, float duration)
        {
            return DOTween.To(() => target.effectColor, x => target.effectColor = x, endValue, duration).SetTarget(target);
        }

        /// <summary>Tweens a Outline's effectColor alpha to the given value.
        /// Also stores the Outline 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 Outline target, float endValue, float duration)
        {
            return DOTween.ToAlpha(() => target.effectColor, x => target.effectColor = x, endValue, duration)
                .SetTarget(target);
        }

        /// <summary>Tweens a Outline's effectDistance to the given value.
        /// Also stores the Outline 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 DOScale(this Outline target, Vector2 endValue, float duration)
        {
            return DOTween.To(() => target.effectDistance, x => target.effectDistance = x, endValue, duration)
                .SetTarget(target);
        }

        #endregion

        #region RectTransform

        /// <summary>Tweens a RectTransform's anchoredPosition to the given value.
        /// Also stores the RectTransform 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 DOAnchorPos(this RectTransform target, Vector2 endValue, float duration, bool snapping = false)
        {
            return DOTween.To(() => target.anchoredPosition, x => target.anchoredPosition = x, endValue, duration)
                .SetOptions(snapping).SetTarget(target);
        }

        /// <summary>Tweens a RectTransform's anchoredPosition3D to the given value.
        /// Also stores the RectTransform 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 DOAnchorPos3D(this RectTransform target, Vector3 endValue, float duration, bool snapping = false)
        {
            return DOTween.To(() => target.anchoredPosition3D, x => target.anchoredPosition3D = x, endValue, duration)
                .SetOptions(snapping).SetTarget(target);
        }

        /// <summary>Tweens a RectTransform's sizeDelta to the given value.
        /// Also stores the RectTransform 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 DOSizeDelta(this RectTransform target, Vector2 endValue, float duration, bool snapping = false)
        {
            return DOTween.To(() => target.sizeDelta, x => target.sizeDelta = x, endValue, duration)
                .SetOptions(snapping).SetTarget(target);
        }

        /// <summary>Punches a RectTransform's anchoredPosition towards the given direction and then back to the starting one
        /// as if it was connected to the starting position via an elastic.
        /// Also stores the RectTransform as the tween's target so it can be used for filtered operations</summary>
        /// <param name="punch">The direction and strength of the punch (added to the RectTransform's current position)</param>
        /// <param name="duration">The duration of the tween</param>
        /// <param name="vibrato">Indicates how much will the punch vibrate</param>
        /// <param name="elasticity">Represents how much (0 to 1) the vector will go beyond the starting position when bouncing backwards.
        /// 1 creates a full oscillation between the punch direction and the opposite direction,
        /// while 0 oscillates only between the punch and the start position</param>
        /// <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
        public static Tweener DOPunchAnchorPos(this RectTransform target, Vector2 punch, float duration, int vibrato = 10, float elasticity = 1, bool snapping = false)
        {
            return DOTween.Punch(() => target.anchoredPosition, x => target.anchoredPosition = x, punch, duration, vibrato, elasticity)
                .SetTarget(target).SetOptions(snapping);
        }

        /// <summary>Shakes a RectTransform's anchoredPosition with the given values.
        /// Also stores the RectTransform as the tween's target so it can be used for filtered operations</summary>
        /// <param name="duration">The duration of the tween</param>
        /// <param name="strength">The shake strength</param>
        /// <param name="vibrato">Indicates how much will the shake vibrate</param>
        /// <param name="randomness">Indicates how much the shake will be random (0 to 180 - values higher than 90 kind of suck, so beware). 
        /// Setting it to 0 will shake along a single direction.</param>
        /// <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
        public static Tweener DOShakeAnchorPos(this RectTransform target, float duration, float strength = 100, int vibrato = 10, float randomness = 90, bool snapping = false)
        {
            return DOTween.Shake(() => target.anchoredPosition, x => target.anchoredPosition = x, duration, strength, vibrato, randomness, true)
                .SetTarget(target).SetSpecialStartupMode(SpecialStartupMode.SetShake).SetOptions(snapping);
        }
        /// <summary>Shakes a RectTransform's anchoredPosition with the given values.
        /// Also stores the RectTransform as the tween's target so it can be used for filtered operations</summary>
        /// <param name="duration">The duration of the tween</param>
        /// <param name="strength">The shake strength on each axis</param>
        /// <param name="vibrato">Indicates how much will the shake vibrate</param>
        /// <param name="randomness">Indicates how much the shake will be random (0 to 180 - values higher than 90 kind of suck, so beware). 
        /// Setting it to 0 will shake along a single direction.</param>
        /// <param name="snapping">If TRUE the tween will smoothly snap all values to integers</param>
        public static Tweener DOShakeAnchorPos(this RectTransform target, float duration, Vector2 strength, int vibrato = 10, float randomness = 90, bool snapping = false)
        {
            return DOTween.Shake(() => target.anchoredPosition, x => target.anchoredPosition = x, duration, strength, vibrato, randomness)
                .SetTarget(target).SetSpecialStartupMode(SpecialStartupMode.SetShake).SetOptions(snapping);
        }

        #region Special

        /// <summary>Tweens a RectTransform's anchoredPosition to the given value, while also applying a jump effect along the Y axis.
        /// Returns a Sequence instead of a Tweener.
        /// Also stores the RectTransform 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="jumpPower">Power of the jump (the max height of the jump is represented by this plus the final Y offset)</param>
        /// <param name="numJumps">Total number of jumps</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 Sequence DOJumpAnchorPos(this RectTransform target, Vector2 endValue, float jumpPower, int numJumps, float duration, bool snapping = false)
        {
            if (numJumps < 1) numJumps = 1;
            float offsetY = endValue.y - target.anchoredPosition.y;
            Sequence s = DOTween.Sequence()
                .Append(DOTween.To(() => target.anchoredPosition, x => target.anchoredPosition = x, new Vector2(endValue.x, 0), duration)
                    .SetOptions(AxisConstraint.X, snapping).SetEase(Ease.Linear)
                ).Join(DOTween.To(() => target.anchoredPosition, x => target.anchoredPosition = x, new Vector2(0, jumpPower), duration / (numJumps * 2))
                    .SetOptions(AxisConstraint.Y, snapping).SetEase(Ease.OutQuad)
                    .SetLoops(numJumps * 2, LoopType.Yoyo)
                ).SetTarget(target).SetEase(DOTween.defaultEaseType);
            s.OnUpdate(() => {
                Vector2 pos = target.anchoredPosition;
                pos.y += DOVirtual.EasedValue(0, offsetY, s.ElapsedDirectionalPercentage(), Ease.OutQuad);
                target.anchoredPosition = pos;
            });
            return s;
        }

        #endregion

        #endregion

        #region Slider

        /// <summary>Tweens a Slider's value to the given value.
        /// Also stores the Slider 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 DOValue(this Slider target, float endValue, float duration, bool snapping = false)
        {
            return DOTween.To(() => target.value, x => target.value = x, endValue, duration)
                .SetOptions(snapping).SetTarget(target);
        }

        #endregion

        #region Text

        /// <summary>Tweens a Text's color to the given value.
        /// Also stores the Text 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 Text target, Color endValue, float duration)
        {
            return DOTween.To(() => target.color, x => target.color = x, endValue, duration).SetTarget(target);
        }

        /// <summary>Tweens a Text's alpha color to the given value.
        /// Also stores the Text 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 Text target, float endValue, float duration)
        {
            return DOTween.ToAlpha(() => target.color, x => target.color = x, endValue, duration)
                .SetTarget(target);
        }

        /// <summary>Tweens a Text's text to the given value.
        /// Also stores the Text as the tween's target so it can be used for filtered operations</summary>
        /// <param name="endValue">The end string to tween to</param><param name="duration">The duration of the tween</param>
        /// <param name="richTextEnabled">If TRUE (default), rich text will be interpreted correctly while animated,
        /// otherwise all tags will be considered as normal text</param>
        /// <param name="scrambleMode">The type of scramble mode to use, if any</param>
        /// <param name="scrambleChars">A string containing the characters to use for scrambling.
        /// Use as many characters as possible (minimum 10) because DOTween uses a fast scramble mode which gives better results with more characters.
        /// Leave it to NULL (default) to use default ones</param>
        public static Tweener DOText(this Text target, string endValue, float duration, bool richTextEnabled = true, ScrambleMode scrambleMode = ScrambleMode.None, string scrambleChars = null)
        {
            return DOTween.To(() => target.text, x => target.text = x, endValue, duration)
                .SetOptions(richTextEnabled, scrambleMode, scrambleChars)
                .SetTarget(target);
        }

        #endregion

        #endregion

        #region Blendables

        #region Graphic

        /// <summary>Tweens a Graphic'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 Graphic 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 Graphic 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

        #region Image

        /// <summary>Tweens a Image'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 Image 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 Image 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

        #region Text

        /// <summary>Tweens a Text's color BY 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 Text 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 Text 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
    }
}