using System;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace SceneView
{
    public class ParametersPanel : MonoBehaviour, IDragHandler, IBeginDragHandler
    {
        public RectTransform rectTransform;
        public const float wide = 400;

        public (TMP_InputField x, TMP_InputField y, TMP_InputField z)
            position, localPosition, localScale; // 删除了 'scale'，因为它在 Awake 中被注释掉了

        public (TMP_InputField x, TMP_InputField y, TMP_InputField z, TMP_InputField w)
            rotation, localRotation;

        private Vector2 shift;
        private int timer = 0;
        private int refreshTime = 10; // 每10帧刷新一次

        // 新增：标志位，表示是否有输入框正在被编辑
        private bool isEditingInputField = false;

        private void Awake()
        {
            if (!rectTransform) rectTransform = GetComponent<RectTransform>();
            if (!rectTransform) rectTransform = gameObject.AddComponent<RectTransform>();
            rectTransform.sizeDelta = new Vector2(wide, 500);
            rectTransform.anchoredPosition = new Vector2(wide / 2 + 10, 0);
            CanvasControl.OnChangeFocusObject += OnChangeFocusObject;

            var title = RectTransformConfig.Default;
            title.AnchorMin = Vector2.up;
            title.AnchorMax = Vector2.one;
            title.Pivot = new Vector2(0.5f, 0);
            title.SizeDelta = new Vector2(0, 50);
            title.AnchoredPosition = new Vector2(0, 0);
            var titleObj = ControlUtilities.CreateRect(transform, "标题", title);
            titleObj.gameObject.AddComponent<Image>().color = new Color(0.3f, 0.3f, 0.3f, 0.8f);
            var titleText = TextConfig.Default;
            titleText.RectConfig = RectTransformConfig.FillParent;
            titleText.Text = "焦点参数";
            ControlUtilities.CreateText(titleObj, titleText);

            var contentConfig = RectTransformConfig.FillParent;
            var content = ControlUtilities.CreateRect(transform, "内容", contentConfig);

            var vLayout = content.gameObject.AddComponent<VerticalLayoutGroup>();
            vLayout.padding = new RectOffset(2, 2, 2, 2);
            vLayout.childAlignment = TextAnchor.UpperCenter;
            vLayout.childControlWidth = true;
            vLayout.childControlHeight = true;
            vLayout.spacing = 2;

            var labelConfig = TextConfig.Default;

            // 全局位置
            labelConfig.Text = "全局位置";
            ControlUtilities.CreateText(content, labelConfig);
            position = CreateVector3InputField(content, ApplyWorldPositionChange);

            // 全局旋转 (使用Quaternion)
            labelConfig.Text = "全局旋转";
            ControlUtilities.CreateText(content, labelConfig);
            rotation = CreateVector4InputField(content, ApplyWorldRotationChange);

            // 局部位置
            labelConfig.Text = "局部位置";
            ControlUtilities.CreateText(content, labelConfig);
            localPosition = CreateVector3InputField(content, ApplyLocalPositionChange);

            // 局部缩放
            labelConfig.Text = "局部缩放";
            ControlUtilities.CreateText(content, labelConfig);
            localScale = CreateVector3InputField(content, ApplyLocalScaleChange);

            // 局部旋转 (使用Quaternion)
            labelConfig.Text = "局部旋转";
            ControlUtilities.CreateText(content, labelConfig);
            localRotation = CreateVector4InputField(content, ApplyLocalRotationChange);
        }

        private void OnDestroy()
        {
            CanvasControl.OnChangeFocusObject -= OnChangeFocusObject;
        }

        private void Update()
        {
            timer++;
            // 只有当没有输入框被编辑时才刷新
            if (timer >= refreshTime && !isEditingInputField)
            {
                timer = 0;
                Refresh();
            }
        }

        public void OnChangeFocusObject(GameObject obj)
        {
            // 焦点对象改变时，立即刷新
            Refresh();
        }

        private void Refresh()
        {
            if (!CanvasControl.FocusGameObject)
            {
                ClearAllInputFields();
                return;
            }
            var targetTransform = CanvasControl.FocusGameObject.transform;

            // --- 全局位置 (World Position) ---
            var currentPosition = targetTransform.position;
            position.x.text = currentPosition.x.ToString("F3"); // "F3" 表示保留3位小数
            position.y.text = currentPosition.y.ToString("F3");
            position.z.text = currentPosition.z.ToString("F3");

            // --- 局部位置 (Local Position) ---
            var currentLocalPosition = targetTransform.localPosition;
            localPosition.x.text = currentLocalPosition.x.ToString("F3");
            localPosition.y.text = currentLocalPosition.y.ToString("F3");
            localPosition.z.text = currentLocalPosition.z.ToString("F3");

            // --- 局部缩放 (Local Scale) ---
            var currentLocalScale = targetTransform.localScale;
            localScale.x.text = currentLocalScale.x.ToString("F3");
            localScale.y.text = currentLocalScale.y.ToString("F3");
            localScale.z.text = currentLocalScale.z.ToString("F3");

            // --- 全局旋转 (World Rotation) - Quaternion ---
            var currentRotation = targetTransform.rotation;
            rotation.x.text = currentRotation.x.ToString("F3");
            rotation.y.text = currentRotation.y.ToString("F3");
            rotation.z.text = currentRotation.z.ToString("F3");
            rotation.w.text = currentRotation.w.ToString("F3");

            // --- 局部旋转 (Local Rotation) - Quaternion ---
            var currentLocalRotation = targetTransform.localRotation;
            localRotation.x.text = currentLocalRotation.x.ToString("F3");
            localRotation.y.text = currentLocalRotation.y.ToString("F3");
            localRotation.z.text = currentLocalRotation.z.ToString("F3");
            localRotation.w.text = currentLocalRotation.w.ToString("F3");
        }

        private void ClearAllInputFields()
        {
            position.x.text = ""; position.y.text = ""; position.z.text = "";
            localPosition.x.text = ""; localPosition.y.text = ""; localPosition.z.text = "";
            localScale.x.text = ""; localScale.y.text = ""; localScale.z.text = "";
            rotation.x.text = ""; rotation.y.text = ""; rotation.z.text = ""; rotation.w.text = "";
            localRotation.x.text = ""; localRotation.y.text = ""; localRotation.z.text = ""; localRotation.w.text = "";
        }

        // Helper method to add common input field event listeners
        private void AddInputFieldListeners(TMP_InputField inputField)
        {
            inputField.onSelect.AddListener((_) => isEditingInputField = true);
            inputField.onDeselect.AddListener((_) =>
            {
                isEditingInputField = false;
                // 在失去焦点后立即刷新，以更新可能的非用户输入引起的改变或重新格式化用户输入
                Refresh(); 
            });
        }


        // 修改 CreateVector3InputField，接受一个Action用于处理onEndEdit
        public (TMP_InputField x, TMP_InputField y, TMP_InputField z) CreateVector3InputField(Transform parent, Action<string, int> onEndEditCallback)
        {
            var rectConfig = RectTransformConfig.Default;
            var pack = ControlUtilities.CreateRect(parent, "向量组", rectConfig);
            var hLayout = pack.gameObject.AddComponent<HorizontalLayoutGroup>();
            hLayout.childForceExpandHeight = true;
            hLayout.childForceExpandWidth = true;
            hLayout.childControlWidth = true;
            hLayout.childControlHeight = true;
            hLayout.spacing = 2;
            hLayout.padding = new RectOffset(2, 2, 2, 2);

            var inputConfig = LabeledInputFieldConfig.Default;
            inputConfig.InputFieldConfig.BackgroundColor = new Color(0.7f, 0.7f, 0.7f, 0.7f);
            inputConfig.LabelWidth = 15;
            inputConfig.LabelFontSize = 14;
            inputConfig.Spacing = 0;

            inputConfig.LabelText = "X";
            var inputX = ControlUtilities.CreateLabeledInputField(pack, inputConfig);
            AddInputFieldListeners(inputX.inputField);
            inputX.inputField.onEndEdit.AddListener(text => onEndEditCallback?.Invoke(text, 0));

            inputConfig.LabelText = "Y";
            var inputY = ControlUtilities.CreateLabeledInputField(pack, inputConfig);
            AddInputFieldListeners(inputY.inputField);
            inputY.inputField.onEndEdit.AddListener(text => onEndEditCallback?.Invoke(text, 1));

            inputConfig.LabelText = "Z";
            var inputZ = ControlUtilities.CreateLabeledInputField(pack, inputConfig);
            AddInputFieldListeners(inputZ.inputField);
            inputZ.inputField.onEndEdit.AddListener(text => onEndEditCallback?.Invoke(text, 2));

            return (inputX.inputField, inputY.inputField, inputZ.inputField);
        }

        // 修改 CreateVector4InputField，接受一个Action用于处理onEndEdit
        public (TMP_InputField x, TMP_InputField y, TMP_InputField z, TMP_InputField w) CreateVector4InputField(
            Transform parent, Action<string, int> onEndEditCallback)
        {
            var rectConfig = RectTransformConfig.Default;
            var pack = ControlUtilities.CreateRect(parent, "向量组", rectConfig);
            var hLayout = pack.gameObject.AddComponent<HorizontalLayoutGroup>();
            hLayout.childForceExpandHeight = true;
            hLayout.childForceExpandWidth = true;
            hLayout.childControlWidth = true;
            hLayout.childControlHeight = true;
            hLayout.spacing = 2;
            hLayout.padding = new RectOffset(2, 2, 2, 2);

            var inputConfig = LabeledInputFieldConfig.Default;
            inputConfig.InputFieldConfig.BackgroundColor = new Color(0.7f, 0.7f, 0.7f, 0.7f);
            inputConfig.LabelWidth = 15;
            inputConfig.LabelFontSize = 14;
            inputConfig.Spacing = 0;

            inputConfig.LabelText = "X";
            var inputX = ControlUtilities.CreateLabeledInputField(pack, inputConfig);
            AddInputFieldListeners(inputX.inputField);
            inputX.inputField.onEndEdit.AddListener(text => onEndEditCallback?.Invoke(text, 0));

            inputConfig.LabelText = "Y";
            var inputY = ControlUtilities.CreateLabeledInputField(pack, inputConfig);
            AddInputFieldListeners(inputY.inputField);
            inputY.inputField.onEndEdit.AddListener(text => onEndEditCallback?.Invoke(text, 1));

            inputConfig.LabelText = "Z";
            var inputZ = ControlUtilities.CreateLabeledInputField(pack, inputConfig);
            AddInputFieldListeners(inputZ.inputField);
            inputZ.inputField.onEndEdit.AddListener(text => onEndEditCallback?.Invoke(text, 2));

            inputConfig.LabelText = "W";
            var inputW = ControlUtilities.CreateLabeledInputField(pack, inputConfig);
            AddInputFieldListeners(inputW.inputField);
            inputW.inputField.onEndEdit.AddListener(text => onEndEditCallback?.Invoke(text, 3));

            return (inputX.inputField, inputY.inputField, inputZ.inputField, inputW.inputField);
        }
        
        private void ApplyWorldPositionChange(string text, int axisIndex)
        {
            if (CanvasControl.FocusGameObject == null) return;
            var targetTransform = CanvasControl.FocusGameObject.transform;
            if (float.TryParse(text, out var newValue))
            {
                var pos = targetTransform.position;
                if (axisIndex == 0) pos.x = newValue;
                else if (axisIndex == 1) pos.y = newValue;
                else if (axisIndex == 2) pos.z = newValue;
                targetTransform.position = pos;
            }
            Refresh(); // 刷新以确保所有相关字段（如localPosition）都已更新
        }

        private void ApplyLocalPositionChange(string text, int axisIndex)
        {
            if (CanvasControl.FocusGameObject == null) return;
            var targetTransform = CanvasControl.FocusGameObject.transform;
            if (float.TryParse(text, out var newValue))
            {
                var localPos = targetTransform.localPosition;
                if (axisIndex == 0) localPos.x = newValue;
                else if (axisIndex == 1) localPos.y = newValue;
                else if (axisIndex == 2) localPos.z = newValue;
                targetTransform.localPosition = localPos;
            }
            Refresh();
        }

        private void ApplyLocalScaleChange(string text, int axisIndex)
        {
            if (CanvasControl.FocusGameObject == null) return;
            var targetTransform = CanvasControl.FocusGameObject.transform;
            if (float.TryParse(text, out var newValue))
            {
                var localScale = targetTransform.localScale;
                if (axisIndex == 0) localScale.x = newValue;
                else if (axisIndex == 1) localScale.y = newValue;
                else if (axisIndex == 2) localScale.z = newValue;
                targetTransform.localScale = localScale;
            }
            Refresh();
        }

        private void ApplyWorldRotationChange(string text, int axisIndex)
        {
            if (CanvasControl.FocusGameObject == null) return;
            var targetTransform = CanvasControl.FocusGameObject.transform;
            if (float.TryParse(text, out var newValue))
            {
                var rot = targetTransform.rotation;
                if (axisIndex == 0) rot.x = newValue;
                else if (axisIndex == 1) rot.y = newValue;
                else if (axisIndex == 2) rot.z = newValue;
                else if (axisIndex == 3) rot.w = newValue;
                targetTransform.rotation = rot; // Quaternion需要整体重新赋值
            }
            Refresh();
        }

        private void ApplyLocalRotationChange(string text, int axisIndex)
        {
            if (CanvasControl.FocusGameObject == null) return;
            var targetTransform = CanvasControl.FocusGameObject.transform;
            if (float.TryParse(text, out var newValue))
            {
                var localRot = targetTransform.localRotation;
                if (axisIndex == 0) localRot.x = newValue;
                else if (axisIndex == 1) localRot.y = newValue;
                else if (axisIndex == 2) localRot.z = newValue;
                else if (axisIndex == 3) localRot.w = newValue;
                targetTransform.localRotation = localRot; // Quaternion需要整体重新赋值
            }
            Refresh();
        }


        public void OnBeginDrag(PointerEventData eventData)
        {
            shift = transform.position - new Vector3(eventData.position.x, eventData.position.y);
        }

        public void OnDrag(PointerEventData eventData)
        {
            transform.position = eventData.position + shift;
        }
    }
}