namespace SpiralCircus.DOTween
{
    using System;
    using DG.Tweening;
    using SpiralCircus.Mathematics;
    using SpiralCircus.Unity;
    using UnityEngine;

    // ReSharper disable InconsistentNaming
    public static class DOTweenTMPExtension
    {
        // Static init
        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterAssembliesLoaded)]
        private static void IncreaseTweenCapacity() => DOTween.SetTweensCapacity(500, 50);

        // Text Crawler
        public static Tween DOCrawl(this DOTweenTMPAnimator animator, float letterInterval, float fadeDuration,
            float scaleDuration, bool reverseOrder = false)
        {
            var sequence = DOTween.Sequence();
            sequence.AppendInterval(0.1f);

            var startIndex = reverseOrder ? animator.textInfo.characterCount - 1 : 0;
            Func<float, bool> condition = reverseOrder ? i => i >= 0 : i => i < animator.textInfo.characterCount;
            var increment = reverseOrder ? -1 : 1;

            for (var i = 0; i < animator.textInfo.characterCount; i++)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                sequence.Insert(0, animator.DOFadeChar(i, 0, Time.deltaTime));
                sequence.Insert(0, animator.DOScaleChar(i, .5f, Time.deltaTime));
            }

            var j = 1;

            for (var i = startIndex; condition(i); i += increment)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                sequence.Insert(j * letterInterval, animator.DOFadeChar(i, 1, fadeDuration));
                sequence.Insert(j * letterInterval, animator.DOScaleChar(i, 1, scaleDuration));
                j++;
            }

            return sequence;
        }
        
        // Roll Scale
        public static Tween DORollScale(this DOTweenTMPAnimator animator, float duration, float interval, float minSize, float maxSize)
        {
            var sequence = DOTween.Sequence();

            var j = 0;

            for (var i = 0; i < animator.textInfo.characterCount; i++)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                sequence
                    .Insert(j * interval, animator.DOScaleChar(i, minSize, duration))
                    .Insert(j * interval + duration, animator.DOScaleChar(i, maxSize, duration));
                j++;
            }

            return sequence;
        }

        // SHORTCUTS

        public static Tween DOResetScale(this DOTweenTMPAnimator animator, float duration)
        {
            var sequence = DOTween.Sequence();

            for (var i = 0; i < animator.textInfo.characterCount; i++)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                sequence.Insert(0, animator.DOScaleChar(i, 1, duration));
            }

            return sequence;
        }

        public static DOTweenTMPAnimator SetAllCharsAlpha(this DOTweenTMPAnimator animator, float alpha)
        {
            for (var i = 0; i < animator.textInfo.characterCount; i++)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                var color = animator.GetCharColor(i);
                color.a = alpha;
                animator.SetCharColor(i, color);
            }

            return animator;
        }

        public static DOTweenTMPAnimator SetCharAlpha(this DOTweenTMPAnimator animator, int index, float alpha)
        {
            var color = animator.GetCharColor(index);
            color.a = alpha;
            animator.SetCharColor(index, color);
            return animator;
        }

        public static DOTweenTMPAnimator SetAllCharOffsets(this DOTweenTMPAnimator animator, Vector2 offset)
        {
            for (var i = 0; i < animator.textInfo.characterCount; i++)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                animator.SetCharOffset(i, offset);
            }

            return animator;
        }

        public static DOTweenTMPAnimator SetAllCharScales(this DOTweenTMPAnimator animator, float scale)
        {
            for (var i = 0; i < animator.textInfo.characterCount; i++)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                animator.SetCharScale(i, Vector3.one * scale);
            }

            return animator;
        }

        public static void WobbleChars(this DOTweenTMPAnimator animator, Vector2 sinAmplitude, Vector2 sinFrequency)
        {
            for (var i = 0; i < animator.textInfo.characterCount; i++)
            {
                if (!animator.textInfo.characterInfo[i].isVisible) continue;
                var times = sinFrequency * ((Time.timeSinceLevelLoad + i) * 2 * Maths.PI);
                var offset = sinAmplitude * new Vector2(Maths.Sin(times.x), Maths.Sin(times.y));
                animator.SetCharOffset(i, offset.ToVector3());
            }
        }
    }
}