using System;
using System.Collections;
using UnityEngine;
using AibisDream;
using AibisDream.FixSystem;
using UnityEngine.Rendering;
using Yarn.Unity;
using DG.Tweening;
using VolFx;
using AibisDream.Kit;

public class UFSystem : MonoBehaviour
{
    private GameObject _UFCover;
    private GameObject _UAudioule;

    private EyeSystem eyeSystem;

    public GameObject UFPanel;

    public SpriteRenderer face;

    private bool isLoopImage;

    [Header("Global UF Cover")]
    [SerializeField] private Volume FullAscillVolume;

    [Header("Target Post-Processing Volumes")]
    [SerializeField] private Volume imageAscillVolume;
    [SerializeField] private Volume imageVolume;
    [SerializeField] private Volume finalVolume;

    private AsciiVol ascii;
    private Tween scaleTween;

    public enum UFState
    {
        UF,
        imagination,
        memory
    }

    private float PresentationSpeed => eyeSystem != null ? eyeSystem.PresentationSpeed : 1f;

    private float ScaleDuration(float duration) =>
        eyeSystem != null ? eyeSystem.ScaleDuration(duration) : duration;

    private void PlayPresentationSfx(string eventName)
    {
        AudioManager.Instance.PlaySfx(eventName, pitch: PresentationSpeed);
    }

    private void Awake()
    {
        FixSystemCenter.SystemDic.Register(this);
        eyeSystem = FindObjectOfType<EyeSystem>();
        ClearUnifiedUfSpriteWeights();
    }

    public void TweenWeight(Volume postProcessingVolume, float targetWeight, float duration)
    {
        if (postProcessingVolume == null)
        {
            return;
        }

        DOTween.To(() => postProcessingVolume.weight, x => postProcessingVolume.weight = x, targetWeight, duration);
    }

    private void ClearUnifiedUfSpriteWeights()
    {
        eyeSystem?.SetUnifiedUfWeights(0f, 0f, 0f);
    }

    private EyeTarget ResolveSpriteTarget()
    {
        if (eyeSystem == null)
        {
            return null;
        }

        if (eyeSystem.CurrentTarget != null)
        {
            return eyeSystem.CurrentTarget;
        }

        if (YarnVariableStorage.Instance != null
            && YarnVariableStorage.Instance.TryGetValue("$currentEyeTarget", out string targetName)
            && !string.IsNullOrEmpty(targetName))
        {
            return eyeSystem.FindEyeTargetByName(targetName);
        }

        return null;
    }

    [YarnCommand("UF_spriteIn")]
    public IEnumerator UF_spriteIn(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        var target = ResolveSpriteTarget();
        if (target != null)
        {
            PlayPresentationSfx("event:/ActionFB/color_imagine");
            target.ImageIn(duration);
        }

        yield return new WaitForSeconds(duration);
    }

    [YarnCommand("UF_spriteOut")]
    public IEnumerator UF_spriteOut(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        var target = ResolveSpriteTarget();
        if (target != null)
        {
            PlayPresentationSfx("event:/ActionFB/color_imagine");
            target.ImageOut(duration);
        }

        yield return new WaitForSeconds(duration);
    }

    [YarnCommand("UF_AllspriteIn")]
    public IEnumerator UF_AllspriteIn(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        foreach (EyeTarget target in eyeSystem.Targets)
        {
            target.ImageIn(duration);
        }

        yield return new WaitForSeconds(duration);
    }

    [YarnCommand("UF_AllspriteOut")]
    public IEnumerator UF_AllspriteOut(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        foreach (EyeTarget target in eyeSystem.Targets)
        {
            target.ImageOut(duration);
        }

        yield return new WaitForSeconds(duration);
    }

    [YarnCommand("UF_faceIn")]
    public IEnumerator UF_faceIn(float duration = 1.5f)
    {
        if (face == null)
        {
            Debug.LogWarning("[UFSystem] UF_faceIn: face SpriteRenderer 未绑定。", this);
            yield break;
        }

        if (face.sprite == null)
        {
            Debug.LogWarning("[UFSystem] UF_faceIn: face.sprite 为空（可能是 aseprite 重导入后子资源 ID 失效）。", this);
        }

        duration = ScaleDuration(duration);
        face.gameObject.SetActive(true);
        face.DOFade(1f, duration);
        yield return new WaitForSeconds(duration);
    }

    [YarnCommand("UF_faceOut")]
    public IEnumerator UF_faceOut(float duration = 1.5f)
    {
        if (face == null)
        {
            yield break;
        }

        duration = ScaleDuration(duration);
        face.DOFade(0f, duration);
        yield return new WaitForSeconds(duration);
        face.gameObject.SetActive(false);
    }

    [YarnCommand("UF_ImaginationEffectIn")]
    public IEnumerator UF_ImaginationEffectIn(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        PlayPresentationSfx("event:/ActionFB/color_imagine");
        ClearUnifiedUfSpriteWeights();
        TweenWeight(imageVolume, 1f, duration);
        yield return new WaitForSeconds(0f);
    }

    [YarnCommand("UF_ImaginationEffectOut")]
    public IEnumerator UF_ImaginationEffectOut(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        TweenWeight(imageVolume, 0f, duration);
        PlayPresentationSfx("event:/ActionFB/color_imagine");
        yield return new WaitForSeconds(0f);
    }

    [YarnCommand("UF_MemoryEffectIn")]
    public IEnumerator UF_MemoryEffectIn(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        PlayPresentationSfx("event:/ActionFB/color_imagine");
        ClearUnifiedUfSpriteWeights();
        TweenWeight(finalVolume, 1f, duration);
        yield return new WaitForSeconds(0f);
    }

    [YarnCommand("UF_MemoryEffectOut")]
    public IEnumerator UF_MemoryEffectOut(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        TweenWeight(finalVolume, 0f, duration);
        PlayPresentationSfx("event:/ActionFB/color_imagine");
        yield return new WaitForSeconds(0f);
    }

    [YarnCommand("UF_EyeTargetAscillIn")]
    public IEnumerator UF_EyeTargetAscillIn(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        PlayPresentationSfx("event:/ActionFB/color_imagine");
        ClearUnifiedUfSpriteWeights();
        TweenWeight(imageAscillVolume, 1f, duration);
        yield return new WaitForSeconds(0f);
    }

    [YarnCommand("UF_EyeTargetAscillOut")]
    public IEnumerator UF_EyeTargetAscillOut(float duration = 1.5f)
    {
        duration = ScaleDuration(duration);
        TweenWeight(imageAscillVolume, 0f, duration);
        PlayPresentationSfx("event:/ActionFB/color_imagine");
        yield return new WaitForSeconds(0f);
    }

    [YarnCommand("UF_SetBorkenValue")]
    public void UF_Borken(int value)
    {
        if (FullAscillVolume == null)
        {
            return;
        }

        if (!FullAscillVolume.gameObject.activeInHierarchy)
        {
            FullAscillVolume.gameObject.SetActive(true);
        }

        if (FullAscillVolume.profile.TryGet(out ascii))
        {
            ascii.m_Depth.value = value;
            ascii.m_Ascii.value = Color.red;
        }
    }

    [YarnCommand("StartUFEffect_loop")]
    public void UFImageLoop()
    {
        StartCoroutine(UFImageLoopProcess());
    }

    [YarnCommand("StopUFEffect_loop")]
    public void StopUFImageLoop()
    {
        isLoopImage = false;
    }

    [YarnCommand("UF_fightEffect")]
    public void UF_fightEffect()
    {
        ClearUnifiedUfSpriteWeights();
        float loopDuration = ScaleDuration(1f);
        scaleTween = DOTween.To(() => 0f, t =>
            {
                if (imageVolume != null)
                {
                    imageVolume.weight = Mathf.Lerp(0f, 1f, t);
                }

                if (imageAscillVolume != null)
                {
                    imageAscillVolume.weight = Mathf.Lerp(0f, 1f, t);
                }

                if (finalVolume != null)
                {
                    finalVolume.weight = Mathf.Lerp(1f, 0f, t);
                }
            }, 1f, loopDuration)
            .SetEase(Ease.InOutSine)
            .SetLoops(-1, LoopType.Yoyo);
    }

    [YarnCommand("UF_StopfightEffect")]
    public void UF_StopfightEffect()
    {
        scaleTween?.Kill();
    }

    public IEnumerator UFImageLoopProcess()
    {
        int index = 0;
        isLoopImage = true;
        while (isLoopImage)
        {
            eyeSystem.StartCoroutine(eyeSystem.SetTargetCoroutine(eyeSystem.Targets[index].name, false));
            yield return new WaitForSeconds(ScaleDuration(0.5f));
            StartCoroutine(UF_spriteIn(0.5f));
            StartCoroutine(UF_ImaginationEffectIn(0.5f));
            eyeSystem.Targets[index].ImageIn(ScaleDuration(0.5f));
            yield return new WaitForSeconds(ScaleDuration(0.5f));
            StartCoroutine(UF_ImaginationEffectOut(0.5f));
            StartCoroutine(UF_MemoryEffectIn(0.5f));
            yield return new WaitForSeconds(ScaleDuration(1f));
            eyeSystem.Targets[index].ImageOut(ScaleDuration(0.5f));
            StartCoroutine(UF_MemoryEffectOut(0.5f));
            index++;
            if (index >= eyeSystem.Targets.Count - 2)
            {
                index = 0;
            }
        }
    }

    public void OpenUFView()
    {
        ClearUnifiedUfSpriteWeights();
        // 先于 EyeSystem.OnEnter：UF 段 SwitchState / sprite 极密，禁止 autoBlink 与过渡眨眼
        eyeSystem?.SetNonExplicitBlinkSuppressed(true);

        if (FullAscillVolume != null && !FullAscillVolume.gameObject.activeInHierarchy)
        {
            FullAscillVolume.gameObject.SetActive(true);
        }

        if (imageAscillVolume != null)
        {
            imageAscillVolume.weight = 1f;
        }

        if (imageVolume != null)
        {
            imageVolume.weight = 0f;
        }

        if (finalVolume != null)
        {
            finalVolume.weight = 0f;
        }
    }

    public void CloseUFView()
    {
        if (FullAscillVolume != null && FullAscillVolume.gameObject.activeInHierarchy)
        {
            FullAscillVolume.gameObject.SetActive(false);
        }

        if (imageAscillVolume != null)
        {
            imageAscillVolume.weight = 1f;
        }

        if (imageVolume != null)
        {
            imageVolume.weight = 0f;
        }

        if (finalVolume != null)
        {
            finalVolume.weight = 0f;
        }

        ClearUnifiedUfSpriteWeights();
        eyeSystem?.SetNonExplicitBlinkSuppressed(false);
    }

    public void OpenCover()
    {
        var bodyModuleSystem = FixSystemCenter.SystemDic.Get<BodyModuleSystem>();
        _UFCover = bodyModuleSystem.FindBodyModuleByName("UF").transform.Find("Cover").gameObject;
        if (_UFCover.activeInHierarchy)
        {
            _UFCover.SetActive(false);
        }
    }

    public void RemoveUF()
    {
        var bodyModuleSystem = FixSystemCenter.SystemDic.Get<BodyModuleSystem>();
        _UAudioule = bodyModuleSystem.FindBodyModuleByName("UF").gameObject;
        if (_UAudioule.activeInHierarchy)
        {
            _UAudioule.SetActive(false);
        }
    }

    [YarnCommand("UF_SwitchState")]
    public IEnumerator SwitchState(string stateName, float duration)
    {
        if (!Enum.TryParse(stateName, true, out UFState state))
        {
            Debug.LogError($"Invalid state name: {stateName}");
            yield break;
        }

        duration = ScaleDuration(duration);
        PlayPresentationSfx("event:/ActionFB/color_imagine");
        ClearUnifiedUfSpriteWeights();

        switch (state)
        {
            case UFState.UF:
                TweenWeight(imageAscillVolume, 1f, duration);
                TweenWeight(imageVolume, 0f, duration);
                TweenWeight(finalVolume, 0f, duration);
                break;
            case UFState.imagination:
                TweenWeight(imageAscillVolume, 0f, duration);
                TweenWeight(imageVolume, 1f, duration);
                TweenWeight(finalVolume, 0f, duration);
                break;
            case UFState.memory:
                TweenWeight(imageAscillVolume, 0f, duration);
                TweenWeight(imageVolume, 0f, duration);
                TweenWeight(finalVolume, 1f, duration);
                break;
            default:
                Debug.LogError($"Unhandled state: {state}");
                yield break;
        }

        yield return new WaitForSeconds(duration);
    }
}