using System;
using System.Collections.Generic;
using System.Reflection;
using Ichni.RhythmGame.Beatmap;
using UnityEngine;

namespace Ichni.RhythmGame
{
    public class PropertyAnimationVector3 : AnimationBase
    {
        #region [暴露属性字段与关联] Exposed Fields & References
        public string componentName;
        public string propertyName;
        public FlexibleFloat propertyValueX, propertyValueY, propertyValueZ;

        private Component targetComponent;
        private FieldInfo targetField;
        private PropertyInfo targetProperty;
        
        // 高性能赋值委托
        private Action<Vector3> vectorSetterDelegate;
        #endregion

        #region [生命周期与工厂] Lifecycle & Factory
        public static PropertyAnimationVector3 GenerateElement(string elementName, Guid id, List<string> tags, bool isFirstGenerated,
            GameElement animatedObject, string componentName, string propertyName, 
            FlexibleFloat propertyValueX, FlexibleFloat propertyValueY, FlexibleFloat propertyValueZ)
        {
            PropertyAnimationVector3 animation = Instantiate(GameManager.Instance.basePrefabs.emptyObject)
                .AddComponent<PropertyAnimationVector3>();
            
            animation.Initialize(elementName, id, tags, isFirstGenerated, animatedObject);

            animation.animatedObject = animatedObject;

            animation.componentName = componentName;
            animation.propertyName = propertyName;
            animation.propertyValueX = propertyValueX;
            animation.propertyValueY = propertyValueY;
            animation.propertyValueZ = propertyValueZ;

            return animation;
        }

        public override void AfterInitialize()
        {
            if (animatedObject == null || string.IsNullOrEmpty(componentName)) return;

            Type componentType = GetTypeFromAllAssemblies(componentName);
            if (componentType != null)
            {
                targetComponent = animatedObject.GetComponentInChildren(componentType);
            }

            if (targetComponent != null)
            {
                InitializeReflection();
            }
            else
            {
                Debug.LogWarning($"[PropertyAnimationVector3] Cannot find Component '{componentName}' strictly on '{animatedObject.name}'.");
            }
            
            base.AfterInitialize();
        }
        
        private Type GetTypeFromAllAssemblies(string typeName)
        {
            foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
            {
                Type type = assembly.GetType(typeName);
                if (type != null) return type;
            }
            return null;
        }

        private void InitializeReflection()
        {
            Type type = targetComponent.GetType();

            targetProperty = type.GetProperty(propertyName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            if (targetProperty != null && targetProperty.CanWrite)
            {
                MethodInfo setMethod = targetProperty.GetSetMethod(nonPublic: true);
                if (setMethod != null && targetProperty.PropertyType == typeof(Vector3))
                {
                    try
                    {
                        vectorSetterDelegate = (Action<Vector3>)Delegate.CreateDelegate(typeof(Action<Vector3>), targetComponent, setMethod);
                        return;
                    }
                    catch { }
                }
            }

            targetField = type.GetField(propertyName, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            if (targetField == null && targetProperty == null)
            {
                Debug.LogWarning($"[PropertyAnimationVector3] Cannot find target Property or Field '{propertyName}' strictly on '{componentName}'.");
            }
        }
        #endregion

        #region [核心动画逻辑] Core Animation Logic
        protected override void UpdateAnimation(float songTime)
        {
            if (targetComponent == null) return;

            propertyValueX?.UpdateFlexibleFloat(songTime);
            propertyValueY?.UpdateFlexibleFloat(songTime);
            propertyValueZ?.UpdateFlexibleFloat(songTime);

            float x = propertyValueX != null ? propertyValueX.value : 0f;
            float y = propertyValueY != null ? propertyValueY.value : 0f;
            float z = propertyValueZ != null ? propertyValueZ.value : 0f;

            Vector3 targetVector = new Vector3(x, y, z);

            if (vectorSetterDelegate != null)
            {
                vectorSetterDelegate(targetVector); 
            }
            else if (targetProperty != null)
            {
                targetProperty.SetValue(targetComponent, targetVector);
            }
            else if (targetField != null)
            {
                targetField.SetValue(targetComponent, targetVector);
            }
            
            if (animatedObject is IHaveDirtyMarkSubmodule dirtyTarget)
            {
                dirtyTarget.dirtyMarkSubmodule.MarkDirty(propertyName);
            }
        }
        
        public override void ApplyTimeOffset(float offset)
        {
            base.ApplyTimeOffset(offset);
            void ApplyOffset(FlexibleFloat ff)
            {
                if (ff == null || ff.animations == null) return;
                foreach(var a in ff.animations) { a.startTime += offset; a.endTime += offset; }
            }
            ApplyOffset(propertyValueX);
            ApplyOffset(propertyValueY);
            ApplyOffset(propertyValueZ);
        }
        #endregion
    }
}