using System.Collections;
using AibisDream.Utility;
using TMPro;
using UnityEngine;
using UnityEngine.Localization.Components;
using UnityEngine.UI;

namespace AibisDream.MiniGame.Language
{
    /// <summary>
    /// Drives the full-frame Huoshan expression screen while keeping readable text in TMP.
    /// The sprite sheet uses the original 384x216 Aseprite timing and the existing world-space
    /// Canvas remains the source of truth for interaction and dynamic language particles.
    /// </summary>
    public sealed class ExpressionScreenPresentationController : MonoBehaviour
    {
        public enum ScreenState
        {
            Reset,
            Deep,
            Panel,
            Output,
            Floating,
            Click,
            FocusHidden
        }

        private const int DeepFirst = 0;
        private const int DeepLast = 14;
        private const int UiFlashFirst = 15;
        private const int UiFlashLast = 29;
        private const int StatusRevealFrame = 21;
        private const int RingFirst = 30;
        private const int RingLast = 40;
        private const int OutputFirst = 41;
        private const int OutputLast = 47;
        private const int OutputTextRevealFrame = 45;
        private const int FloatingFrame = 48;
        private const int ClickFirst = 49;
        private const int ClickLast = 52;

        private const string ObjectiveLocalizationKey = "huoshan_expression_objective";
        private const string OutputLocalizationKey = "huoshan_expression_output";

        [Header("Frame Animation")]
        [SerializeField] private SpriteRenderer screenRenderer;
        [SerializeField] private Sprite[] frames = new Sprite[53];

        [Header("Existing TMP / Interaction")]
        [SerializeField] private TMP_Text integrationProgressText;
        [SerializeField] private TMP_Text interferenceCountText;
        [SerializeField] private Button outputButton;
        [SerializeField] private TMP_FontAsset screenFont;

        [Header("Objective TMP (384x216 reference)")]
        [SerializeField] private Vector2 objectivePosition = new Vector2(-8.18f, -4.08f);
        [SerializeField] private Vector2 objectiveSize = new Vector2(7.4f, 0.95f);
        [SerializeField] private float objectiveFontSize = 0.28f;
        [SerializeField] private Color objectiveColor = new Color(0.78f, 0.91f, 1f, 1f);

        private int playbackGeneration;
        private TMP_Text objectiveText;
        private TMP_Text outputText;
        private LocalizeStringEvent objectiveLocalization;
        private LocalizeStringEvent outputLocalization;
        private Material objectiveMaterial;
        private ScreenState state = ScreenState.Reset;

        public ScreenState State => state;

        private void Awake()
        {
            ResolveSceneReferences();
            ConfigureExistingUiAsTextOnly();
            CreateObjectiveText();
            BindStaticLocalization();
            ResetImmediate();
        }

        private void ResolveSceneReferences()
        {
            if (screenRenderer == null)
            {
                SpriteRenderer[] renderers = GetComponentsInChildren<SpriteRenderer>(true);
                foreach (SpriteRenderer candidate in renderers)
                {
                    if (candidate != null && candidate.gameObject.name == "火山释放log界面")
                    {
                        screenRenderer = candidate;
                        break;
                    }
                }
            }

            if (outputButton != null)
            {
                outputText = outputButton.GetComponentInChildren<TMP_Text>(true);
            }
        }

        private void ConfigureExistingUiAsTextOnly()
        {
            MakeParentImageTransparent(integrationProgressText);
            MakeParentImageTransparent(interferenceCountText);

            if (integrationProgressText != null)
                integrationProgressText.raycastTarget = false;
            if (interferenceCountText != null)
                interferenceCountText.raycastTarget = false;

            if (outputButton != null && outputButton.targetGraphic != null)
            {
                Color color = outputButton.targetGraphic.color;
                color.a = 0f;
                outputButton.targetGraphic.color = color;
                outputButton.targetGraphic.raycastTarget = true;
            }
        }

        private static void MakeParentImageTransparent(TMP_Text text)
        {
            if (text == null || text.transform.parent == null)
                return;

            Image image = text.transform.parent.GetComponent<Image>();
            if (image == null)
                return;

            Color color = image.color;
            color.a = 0f;
            image.color = color;
            image.raycastTarget = false;
        }

        private void CreateObjectiveText()
        {
            Canvas canvas = integrationProgressText != null
                ? integrationProgressText.GetComponentInParent<Canvas>()
                : GetComponentInChildren<Canvas>(true);
            if (canvas == null)
            {
                Debug.LogError("[ExpressionScreenPresentation] ExpressView 下未找到 World Space Canvas，任务描述无法创建。");
                return;
            }

            Transform existing = canvas.transform.Find("Expression Objective (TMP)");
            if (existing != null)
            {
                objectiveText = existing.GetComponent<TMP_Text>();
                return;
            }

            var objectiveObject = new GameObject(
                "Expression Objective (TMP)",
                typeof(RectTransform),
                typeof(CanvasRenderer),
                typeof(TextMeshProUGUI));
            objectiveObject.layer = canvas.gameObject.layer;

            RectTransform rect = objectiveObject.GetComponent<RectTransform>();
            rect.SetParent(canvas.transform, false);
            rect.anchorMin = new Vector2(0.5f, 0.5f);
            rect.anchorMax = new Vector2(0.5f, 0.5f);
            rect.pivot = new Vector2(0f, 0.5f);
            rect.anchoredPosition = objectivePosition;
            rect.sizeDelta = objectiveSize;
            rect.SetAsFirstSibling();

            var text = objectiveObject.GetComponent<TextMeshProUGUI>();
            text.font = screenFont;
            if (integrationProgressText != null && integrationProgressText.fontSharedMaterial != null)
            {
                objectiveMaterial = new Material(integrationProgressText.fontSharedMaterial)
                {
                    name = "Huoshan Expression Objective TMP (Runtime)"
                };
                text.fontSharedMaterial = objectiveMaterial;
            }
            text.fontSize = objectiveFontSize;
            text.fontStyle = FontStyles.Bold;
            text.color = objectiveColor;
            text.alignment = TextAlignmentOptions.Left;
            text.enableWordWrapping = true;
            text.overflowMode = TextOverflowModes.Truncate;
            text.raycastTarget = false;
            objectiveText = text;
        }

        private void BindStaticLocalization()
        {
            objectiveLocalization = BindLocalizedText(objectiveText, ObjectiveLocalizationKey);
            outputLocalization = BindLocalizedText(outputText, OutputLocalizationKey);
        }

        private static LocalizeStringEvent BindLocalizedText(TMP_Text text, string entryKey)
        {
            if (text == null)
                return null;

            LocalizeStringEvent localize = text.GetComponent<LocalizeStringEvent>();
            if (localize == null)
                localize = text.gameObject.AddComponent<LocalizeStringEvent>();

            localize.StringReference.SetReference(ConstRef.UITextTable, entryKey);
            localize.OnUpdateString.RemoveAllListeners();
            localize.OnUpdateString.AddListener(value => text.text = value);
            localize.StringReference.RefreshString();
            return localize;
        }

        public IEnumerator PlayDeepAndWait()
        {
            int generation = BeginPlayback();
            SetOverlayVisibility(false, false, false);
            yield return PlayRangeAndWait(DeepFirst, DeepLast, generation);
            if (generation != playbackGeneration)
                yield break;
            state = ScreenState.Deep;
        }

        public IEnumerator PlayPanelAndWait()
        {
            int generation = BeginPlayback();
            yield return PlayRangeAndWait(UiFlashFirst, UiFlashLast, generation, StatusRevealFrame, ShowStatusAndObjective);
            if (generation != playbackGeneration)
                yield break;

            yield return PlayRangeAndWait(RingFirst, RingLast, generation);
            if (generation != playbackGeneration)
                yield break;

            ShowStatusAndObjective();
            state = ScreenState.Panel;
        }

        public IEnumerator PlayOutputAndWait()
        {
            int generation = BeginPlayback();
            SetOutputTextVisible(false);
            yield return PlayRangeAndWait(
                OutputFirst,
                OutputLast,
                generation,
                OutputTextRevealFrame,
                () => SetOutputTextVisible(true));
            if (generation != playbackGeneration)
                yield break;

            SetFrame(FloatingFrame);
            SetOutputTextVisible(true);
            state = ScreenState.Floating;
        }

        public IEnumerator PlayClickAndWait()
        {
            int generation = BeginPlayback();
            SetOutputTextVisible(true);
            yield return PlayRangeAndWait(ClickFirst, ClickLast, generation);
            if (generation != playbackGeneration)
                yield break;
            state = ScreenState.Click;
        }

        public void PrepareForNewRound()
        {
            StopPlayback();
            SetFrame(DeepFirst);
            SetOverlayVisibility(false, false, false);
            state = ScreenState.Reset;
        }

        public void HideOverlayForFocus()
        {
            SetOverlayVisibility(false, false, false);
            state = ScreenState.FocusHidden;
        }

        public void ResetImmediate()
        {
            StopPlayback();
            SetFrame(DeepFirst);
            SetOverlayVisibility(false, false, false);
            if (outputButton != null)
            {
                outputButton.interactable = false;
                outputButton.gameObject.SetActive(false);
            }
            state = ScreenState.Reset;
        }

        private int BeginPlayback()
        {
            StopPlayback();
            return playbackGeneration;
        }

        private IEnumerator PlayRangeAndWait(
            int firstFrame,
            int lastFrame,
            int generation,
            int revealFrame = -1,
            System.Action revealAction = null)
        {
            for (int frameIndex = firstFrame; frameIndex <= lastFrame; frameIndex++)
            {
                if (generation != playbackGeneration)
                    yield break;

                SetFrame(frameIndex);
                if (frameIndex == revealFrame)
                    revealAction?.Invoke();
                yield return new WaitForSeconds(GetFrameDuration(frameIndex));
            }
        }

        private void SetFrame(int frameIndex)
        {
            if (screenRenderer == null || frames == null ||
                frameIndex < 0 || frameIndex >= frames.Length || frames[frameIndex] == null)
            {
                return;
            }

            screenRenderer.gameObject.SetActive(true);
            screenRenderer.enabled = true;
            screenRenderer.sprite = frames[frameIndex];
        }

        private static float GetFrameDuration(int frameIndex)
        {
            switch (frameIndex)
            {
                case 0:
                case 29:
                case 47:
                case 48:
                    return 0.3f;
                case 16:
                case 17:
                case 21:
                case 25:
                case 49:
                case 50:
                case 51:
                case 52:
                    return 0.05f;
                default:
                    return 0.1f;
            }
        }

        private void ShowStatusAndObjective()
        {
            SetOverlayVisibility(true, true, false);
        }

        private void SetOverlayVisibility(bool statusVisible, bool objectiveVisible, bool outputVisible)
        {
            SetStatusTextVisible(integrationProgressText, statusVisible);
            SetStatusTextVisible(interferenceCountText, statusVisible);
            if (objectiveText != null)
                objectiveText.gameObject.SetActive(objectiveVisible);
            SetOutputTextVisible(outputVisible);
        }

        private static void SetStatusTextVisible(TMP_Text text, bool visible)
        {
            if (text == null)
                return;

            if (visible)
            {
                var canvasGroup = text.GetComponentInParent<CanvasGroup>();
                if (canvasGroup != null)
                    canvasGroup.alpha = 1f;
            }

            if (text.transform.parent != null)
                text.transform.parent.gameObject.SetActive(visible);
            text.gameObject.SetActive(visible);
        }

        private void SetOutputTextVisible(bool visible)
        {
            if (outputText != null)
                outputText.gameObject.SetActive(visible);
        }

        private void StopPlayback()
        {
            playbackGeneration++;
        }

        private void OnDestroy()
        {
            if (objectiveLocalization != null)
                objectiveLocalization.OnUpdateString.RemoveAllListeners();
            if (outputLocalization != null)
                outputLocalization.OnUpdateString.RemoveAllListeners();
            if (objectiveMaterial != null)
                Destroy(objectiveMaterial);
        }
    }
}