using System;
using System.Collections;
using AibisDream.Kit;
using AibisDream.SaveSystem;
using UnityEngine;

namespace AibisDream
{
    /// <summary>D2 Sleep 专属动态表现门面；普通静态图片仍由 SpriteShowcase 管理。</summary>
    public sealed class Day2SleepPresentationController : Singleton<Day2SleepPresentationController>
    {
        [Header("通用展示引用")]
        [SerializeField] private SpriteShowcase _showcase;
        [SerializeField] private SpriteRenderer _smallRenderer;
        [SerializeField] private SpriteRenderer _largeRenderer;

        [Header("风筝 / 对焦材质")]
        [SerializeField] private Material _focusMaterial;
        [SerializeField] private KiteWindSettings _kiteWindSettings = new();
        [SerializeField] private KiteCameraSettings _kiteCameraSettings = new();
        [SerializeField] private KiteFocusSettings _kiteFocusSettings = new();

        private ReelMotionPresenter _reel;
        private LargeSpriteEffectsPresenter _largeEffects;
        private KitePresentation _kite;
        private Day2SleepPresentationMode _mode;

        public bool HasPersistableState => _mode != Day2SleepPresentationMode.None;

        public override void OnSingletonInit()
        {
            _showcase ??= SpriteShowcase.Instance;
            _reel = new ReelMotionPresenter(_smallRenderer);
            _largeEffects = new LargeSpriteEffectsPresenter(this, _largeRenderer, _focusMaterial);
            _kite = new KitePresentation(
                _smallRenderer,
                _focusMaterial,
                _kiteWindSettings,
                _kiteCameraSettings,
                _kiteFocusSettings);
            if (_showcase != null)
                _showcase.PresentationChanging += HandleGenericPresentationChanging;
            ClearPresentationEffects();
        }

        private void OnDisable()
        {
            ClearPresentationEffects();
        }

        public override void OnSingletonDestroy()
        {
            if (_showcase != null)
                _showcase.PresentationChanging -= HandleGenericPresentationChanging;
            ClearPresentationEffects();
            base.OnSingletonDestroy();
        }

        public IEnumerator ShowSpriteMotion(string picName, string motionProfile, float duration = 0.35f)
        {
            yield return PrepareExclusiveMode();
            yield return _reel.Show(picName, motionProfile);
            if (_reel.IsShowing)
                _mode = Day2SleepPresentationMode.SmallMotion;
        }

        public void PlayCurrentMotion(string motionProfile)
        {
            if (_mode != Day2SleepPresentationMode.SmallMotion) return;
            _reel.PlayCurrentMotion(motionProfile);
        }

        public IEnumerator ShowKite(float height, int wind, float duration = 0.35f)
        {
            if (_mode != Day2SleepPresentationMode.Kite)
                yield return PrepareExclusiveMode();
            yield return _kite.Show(height, wind, duration);
            if (_kite.IsShowing)
                _mode = Day2SleepPresentationMode.Kite;
        }

        public void SetKiteState(float height, int wind, float duration = 0.9f)
        {
            _kite.SetState(height, wind, duration);
        }

        public void SetKiteWind(int wind, float turbulence = -1f)
        {
            _kite.SetWind(wind, turbulence);
        }

        public void PlayKiteAccent(string profile)
        {
            _kite.PlayAccent(profile);
        }

        public IEnumerator FallKiteOutOfFrame(float duration = 1.1f)
        {
            yield return _kite.FallOutOfFrame(duration);
        }

        public IEnumerator HideKite(float duration = 1f)
        {
            yield return _kite.Hide(duration);
            if (_mode == Day2SleepPresentationMode.Kite)
                _mode = Day2SleepPresentationMode.None;
        }

        public IEnumerator ShowLargeSpriteAnimation(
            string picNamePrefix,
            int frameCount,
            float secondsPerFrame = 0.2f,
            float duration = 1f)
        {
            yield return PrepareExclusiveMode();
            yield return _largeEffects.ShowAnimation(
                picNamePrefix,
                frameCount,
                secondsPerFrame,
                duration);
            if (_largeEffects.IsAnimationPlaying)
                _mode = Day2SleepPresentationMode.LargeEffects;
        }

        public void SetLargeSpriteBlur(float amount, float blurSize = 0.012f)
        {
            _largeEffects.SetBlur(amount, blurSize);
            MarkLargeEffectsActive();
        }

        public IEnumerator TweenLargeSpriteBlur(
            float targetAmount,
            float duration,
            float blurSize = 0.012f)
        {
            MarkLargeEffectsActive();
            yield return _largeEffects.TweenBlur(targetAmount, duration, blurSize);
        }

        public IEnumerator AnimateLargePresentation(float scale, float alpha, float duration)
        {
            MarkLargeEffectsActive();
            yield return _largeEffects.AnimatePresentation(scale, alpha, duration);
        }

        public void SetLargePresentationImmediate(float scale, float alpha)
        {
            _largeEffects.ApplyPresentationImmediate(scale, alpha);
            MarkLargeEffectsActive();
        }

        public void ResetLargePresentationImmediate()
        {
            _largeEffects.ResetPresentationImmediate();
        }

        public void StopLargePresentationAnimation()
        {
            _largeEffects.StopPresentationAnimation();
        }

        public void HideLargePresentationImmediate()
        {
            _largeEffects.HidePresentationImmediate();
            if (_mode == Day2SleepPresentationMode.LargeEffects)
                _mode = Day2SleepPresentationMode.None;
        }

        public void SetLargeSpriteImmediate(Sprite sprite)
        {
            _largeEffects.SetSpriteImmediate(sprite);
        }

        public void ClearPresentationEffects()
        {
            _reel?.ClearImmediate();
            _kite?.ClearImmediate();
            _largeEffects?.ResetEffectsImmediate();
            _mode = Day2SleepPresentationMode.None;
        }

        public Day2SleepPresentationSnapshotDto CaptureSnapshot()
        {
            var snapshot = new Day2SleepPresentationSnapshotDto
            {
                mode = _mode.ToString()
            };

            switch (_mode)
            {
                case Day2SleepPresentationMode.SmallMotion:
                    snapshot.picName = _reel.CurrentPicName;
                    snapshot.motionProfile = _reel.CurrentMotionProfile;
                    break;
                case Day2SleepPresentationMode.Kite:
                    snapshot.kiteHeight = _kite.TargetHeight;
                    snapshot.kiteWind = _kite.CurrentWind;
                    snapshot.kiteTurbulence = _kite.Turbulence;
                    break;
                case Day2SleepPresentationMode.LargeEffects:
                    snapshot.largeAnimationActive = _largeEffects.IsAnimationPlaying;
                    snapshot.largeAnimationPrefix = _largeEffects.AnimationPrefix;
                    snapshot.largeAnimationFrameCount = _largeEffects.AnimationFrameCount;
                    snapshot.largeAnimationSecondsPerFrame = _largeEffects.AnimationSecondsPerFrame;
                    snapshot.largeBlurAmount = _largeEffects.TargetBlurAmount;
                    snapshot.largeBlurSize = _largeEffects.TargetBlurSize;
                    snapshot.largeScaleMultiplier = _largeEffects.TargetScaleMultiplier;
                    snapshot.largeAlpha = _largeEffects.TargetAlpha;
                    break;
            }
            return snapshot;
        }

        public IEnumerator RestoreSnapshotAsync(
            Day2SleepPresentationSnapshotDto snapshot,
            Action<string> warning = null)
        {
            ClearPresentationEffects();
            if (snapshot == null) yield break;
            if (!Enum.TryParse(snapshot.mode, true, out Day2SleepPresentationMode mode))
            {
                warning?.Invoke($"[Day2SleepPresentation] Unknown mode: {snapshot.mode}");
                yield break;
            }

            switch (mode)
            {
                case Day2SleepPresentationMode.SmallMotion:
                    if (!string.IsNullOrWhiteSpace(snapshot.picName))
                        yield return ShowSpriteMotion(snapshot.picName, snapshot.motionProfile, 0f);
                    break;
                case Day2SleepPresentationMode.Kite:
                    yield return ShowKite(snapshot.kiteHeight, snapshot.kiteWind, 0f);
                    SetKiteWind(snapshot.kiteWind, snapshot.kiteTurbulence);
                    break;
                case Day2SleepPresentationMode.LargeEffects:
                    if (snapshot.largeAnimationActive
                        && !string.IsNullOrWhiteSpace(snapshot.largeAnimationPrefix)
                        && snapshot.largeAnimationFrameCount > 0)
                    {
                        yield return ShowLargeSpriteAnimation(
                            snapshot.largeAnimationPrefix,
                            snapshot.largeAnimationFrameCount,
                            snapshot.largeAnimationSecondsPerFrame,
                            0f);
                    }
                    _largeEffects.SetBlur(snapshot.largeBlurAmount, snapshot.largeBlurSize);
                    _largeEffects.ApplyPresentationImmediate(
                        snapshot.largeScaleMultiplier <= 0f ? 1f : snapshot.largeScaleMultiplier,
                        snapshot.largeAlpha);
                    _mode = Day2SleepPresentationMode.LargeEffects;
                    break;
            }
        }

        private IEnumerator PrepareExclusiveMode()
        {
            if (_showcase != null)
                yield return _showcase.HideAll(0f);
            ClearPresentationEffects();
        }

        private void HandleGenericPresentationChanging()
        {
            ClearPresentationEffects();
        }

        private void MarkLargeEffectsActive()
        {
            if (_largeRenderer != null && _largeRenderer.gameObject.activeSelf)
                _mode = Day2SleepPresentationMode.LargeEffects;
        }
    }
}