using UnityEngine;
using UnityEngine.UI;

namespace AdaptUI
{
    [System.Serializable]
    public struct CanvasScalerData
    {
        public Vector2 referenceResolution;
        public float matchWidthOrHeight;

        public CanvasScalerData(CanvasScaler scaler)
        {
            referenceResolution = scaler.referenceResolution;
            matchWidthOrHeight = scaler.matchWidthOrHeight;
        }

        public bool IsValid()
        {
            return referenceResolution != Vector2.zero;
        }
    }

    [ExecuteAlways]
    [RequireComponent(typeof(CanvasScaler))]
    public class UICanvasScalerAdaptive : MonoBehaviour
    {
        [Header("🎛 默认 CanvasScaler 配置")]
        [SerializeField] public CanvasScalerData defaultScaler;
        
        [Header("📱 iPhone CanvasScaler 配置")]
        [SerializeField] public CanvasScalerData iPhoneScaler;

        [Header("💻 iPad CanvasScaler 配置")]
        [SerializeField] public CanvasScalerData iPadScaler;

        private CanvasScaler canvasScaler;
        private bool isInitialized = false;

        private void Awake()
        {
            canvasScaler = GetComponent<CanvasScaler>();
#if UNITY_EDITOR
            if (!isInitialized)
            {
                //   Debug.Log("UICanvasScalerAdaptive: 未初始化，跳过 ApplyScaler()");
                if (Application.isPlaying)
                    ApplyScaler();
                return;
            }
#endif
            ApplyScaler();  // 运行时应用 UI 适配
        }

#if UNITY_EDITOR
        private void Reset()
        {
            canvasScaler = GetComponent<CanvasScaler>();

            if (!isInitialized)
            {
            //    Debug.Log("UICanvasScalerAdaptive: 首次挂载，自动记录当前 CanvasScaler 配置");
                defaultScaler = new CanvasScalerData(canvasScaler);
                iPhoneScaler = new CanvasScalerData(canvasScaler);
                iPadScaler = new CanvasScalerData(canvasScaler);
                isInitialized = true;  
            }
        }
#endif

        public void ApplyScaler()
        {
            if (canvasScaler == null) return;

            DeviceTypeHelper.DeviceType deviceType = DeviceTypeHelper.DetectDeviceType();
            CanvasScalerData targetScaler = (deviceType == DeviceTypeHelper.DeviceType.iPhone) ? iPhoneScaler : iPadScaler;

            canvasScaler.referenceResolution = targetScaler.referenceResolution;
            canvasScaler.matchWidthOrHeight = targetScaler.matchWidthOrHeight;

          //  Debug.Log($"📌 CanvasScaler 适配完成: 设备 = {deviceType}, 分辨率 = {targetScaler.referenceResolution}, Match = {targetScaler.matchWidthOrHeight}");
        }

        public CanvasScalerData GetScaler(bool isIpad)
        {
            return isIpad ? iPadScaler : iPhoneScaler;
        }

        public void SetScaler(bool isIpad, CanvasScaler scaler)
        {
            if (isIpad)
            {
                iPadScaler = new CanvasScalerData(scaler);
            }
            else
            {
                iPhoneScaler = new CanvasScalerData(scaler);
            }
         //   Debug.Log($"📌 UICanvasScalerAdaptive: 设置 CanvasScaler 为 {(isIpad ? "iPad" : "iPhone")}");
        }
    }
}