using UnityEngine;
using UnityEditor;
using UnityEngine.UIElements;
using UnityEditor.UIElements;

namespace KindRetargeting
{
    [CustomEditor(typeof(LimbWeightController))]
    public class LimbWeightControllerEditor : BaseRetargetingEditor
    {
        private const string CommonUssPath = "Assets/Scripts/Streamingle/StreamingleControl/Editor/UXML/StreamingleCommon.uss";

        SerializedProperty maxDistance;
        SerializedProperty minDistance;
        SerializedProperty weightSmoothSpeed;
        SerializedProperty middleWeightMultiplier;
        SerializedProperty hipsMinDistance;
        SerializedProperty hipsMaxDistance;
        SerializedProperty props;
        SerializedProperty characterRoot;
        SerializedProperty groundHipsMinHeight;
        SerializedProperty groundHipsMaxHeight;
        SerializedProperty footHeightMinThreshold;
        SerializedProperty footHeightMaxThreshold;
        SerializedProperty enableLeftArmIK;
        SerializedProperty enableRightArmIK;
        SerializedProperty chairSeatHeightOffset;

        protected override void OnEnable()
        {
            base.OnEnable();
            if (serializedObject == null) return;

            maxDistance = serializedObject.FindProperty("maxDistance");
            minDistance = serializedObject.FindProperty("minDistance");
            weightSmoothSpeed = serializedObject.FindProperty("weightSmoothSpeed");
            middleWeightMultiplier = serializedObject.FindProperty("middleWeightMultiplier");
            hipsMinDistance = serializedObject.FindProperty("hipsMinDistance");
            hipsMaxDistance = serializedObject.FindProperty("hipsMaxDistance");
            props = serializedObject.FindProperty("props");
            characterRoot = serializedObject.FindProperty("characterRoot");
            groundHipsMinHeight = serializedObject.FindProperty("groundHipsMinHeight");
            groundHipsMaxHeight = serializedObject.FindProperty("groundHipsMaxHeight");
            footHeightMinThreshold = serializedObject.FindProperty("footHeightMinThreshold");
            footHeightMaxThreshold = serializedObject.FindProperty("footHeightMaxThreshold");
            enableLeftArmIK = serializedObject.FindProperty("enableLeftArmIK");
            enableRightArmIK = serializedObject.FindProperty("enableRightArmIK");
            chairSeatHeightOffset = serializedObject.FindProperty("chairSeatHeightOffset");
        }

        public override VisualElement CreateInspectorGUI()
        {
            if (serializedObject == null || target == null)
                return new VisualElement();

            var root = new VisualElement();

            var commonUss = AssetDatabase.LoadAssetAtPath<StyleSheet>(CommonUssPath);
            if (commonUss != null) root.styleSheets.Add(commonUss);

            // IK 활성화 설정
            var ikFoldout = new Foldout { text = "IK 활성화 설정", value = true };
            ikFoldout.Add(new PropertyField(enableLeftArmIK, "왼팔 IK 활성화"));
            ikFoldout.Add(new PropertyField(enableRightArmIK, "오른팔 IK 활성화"));
            root.Add(ikFoldout);

            // 거리 기반 가중치 설정
            var distFoldout = new Foldout { text = "거리 기반 가중치 설정", value = true };
            distFoldout.Add(BuildMinMaxRange("거리 범위 (가중치 1 → 0)", minDistance, maxDistance, 0f, 1f));
            root.Add(distFoldout);

            // 가중치 변화 설정
            var weightFoldout = new Foldout { text = "가중치 변화 설정", value = true };
            weightFoldout.Add(new PropertyField(weightSmoothSpeed, "가중치 변화 속도"));
            root.Add(weightFoldout);

            // 허리 가중치 설정
            var hipsFoldout = new Foldout { text = "허리 가중치 설정", value = true };
            hipsFoldout.Add(BuildMinMaxRange("허리 거리 범위 (가중치 1 → 0)", hipsMinDistance, hipsMaxDistance, 0f, 1f));
            root.Add(hipsFoldout);

            // 바닥 기준 히프 보정 설정
            var groundFoldout = new Foldout { text = "바닥 기준 히프 보정 설정", value = true };
            groundFoldout.Add(BuildMinMaxRange("바닥 기준 히프 높이 범위 (가중치 0 → 1)", groundHipsMinHeight, groundHipsMaxHeight, 0f, 2f));
            root.Add(groundFoldout);

            // 발 높이 기반 가중치 설정
            var footFoldout = new Foldout { text = "발 높이 기반 가중치 설정", value = true };
            footFoldout.Add(BuildMinMaxRange("발 높이 범위 (가중치 1 → 0)", footHeightMinThreshold, footHeightMaxThreshold, 0.1f, 1f));
            root.Add(footFoldout);

            // 의자 앉기 높이 설정
            var chairFoldout = new Foldout { text = "의자 앉기 높이 설정", value = true };
            chairFoldout.Add(new PropertyField(chairSeatHeightOffset, "좌석 높이 오프셋"));
            root.Add(chairFoldout);

            // 참조 설정
            var refFoldout = new Foldout { text = "참조 설정", value = true };
            refFoldout.Add(new PropertyField(props, "프랍 오브젝트"));
            refFoldout.Add(new PropertyField(characterRoot, "캐릭터 루트"));
            root.Add(refFoldout);

            // 변경 감지
            root.TrackSerializedObjectValue(serializedObject, so =>
            {
                if (target == null) return;
                MarkDirty();
                var script = (LimbWeightController)target;
                var retargeting = script.GetComponent<CustomRetargetingScript>();
                if (retargeting != null)
                    EditorUtility.SetDirty(retargeting);
            });

            return root;
        }

        private VisualElement BuildMinMaxRange(string label, SerializedProperty minProp, SerializedProperty maxProp, float limitMin, float limitMax)
        {
            var container = new VisualElement { style = { marginBottom = 4 } };
            if (minProp == null || maxProp == null)
            {
                container.Add(new HelpBox($"'{label}' 프로퍼티를 찾을 수 없습니다.", HelpBoxMessageType.Warning));
                return container;
            }
            container.Add(new Label(label) { style = { marginBottom = 2 } });

            var row = new VisualElement { style = { flexDirection = FlexDirection.Row, alignItems = Align.Center } };

            var minField = new FloatField { value = minProp.floatValue, style = { width = 50 } };
            var slider = new MinMaxSlider(minProp.floatValue, maxProp.floatValue, limitMin, limitMax);
            slider.style.flexGrow = 1;
            slider.style.marginLeft = slider.style.marginRight = 4;
            var maxField = new FloatField { value = maxProp.floatValue, style = { width = 50 } };

            // MinMaxSlider → sync fields + properties
            slider.RegisterValueChangedCallback(evt =>
            {
                minProp.floatValue = evt.newValue.x;
                maxProp.floatValue = evt.newValue.y;
                serializedObject.ApplyModifiedProperties();
                minField.SetValueWithoutNotify(evt.newValue.x);
                maxField.SetValueWithoutNotify(evt.newValue.y);
            });

            // FloatField min → sync slider + property
            minField.RegisterValueChangedCallback(evt =>
            {
                float clamped = Mathf.Clamp(evt.newValue, limitMin, maxProp.floatValue);
                minProp.floatValue = clamped;
                serializedObject.ApplyModifiedProperties();
                slider.SetValueWithoutNotify(new Vector2(clamped, maxProp.floatValue));
                minField.SetValueWithoutNotify(clamped);
            });

            // FloatField max → sync slider + property
            maxField.RegisterValueChangedCallback(evt =>
            {
                float clamped = Mathf.Clamp(evt.newValue, minProp.floatValue, limitMax);
                maxProp.floatValue = clamped;
                serializedObject.ApplyModifiedProperties();
                slider.SetValueWithoutNotify(new Vector2(minProp.floatValue, clamped));
                maxField.SetValueWithoutNotify(clamped);
            });

            // Track external changes (undo, etc.)
            container.TrackPropertyValue(minProp, p =>
            {
                minField.SetValueWithoutNotify(p.floatValue);
                slider.SetValueWithoutNotify(new Vector2(p.floatValue, maxProp.floatValue));
            });
            container.TrackPropertyValue(maxProp, p =>
            {
                maxField.SetValueWithoutNotify(p.floatValue);
                slider.SetValueWithoutNotify(new Vector2(minProp.floatValue, p.floatValue));
            });

            row.Add(minField);
            row.Add(slider);
            row.Add(maxField);
            container.Add(row);

            return container;
        }
    }
}