using System;
using System.Collections;
using System.Collections.Generic;
using DG.Tweening;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace AppUI.View.Home.Main
{
    [Serializable]
    public class TopBarButtonInfoTMP
    {
        public string Name;
        public Image Icon;
        [Tooltip("选中态图标，不填则保持当前 Sprite 仅切换颜色")]
        public Sprite selectedIconSprite;
        [Tooltip("未选中态图标，不填则保持当前 Sprite 仅切换颜色")]
        public Sprite unselectedIconSprite;
        public TMP_Text text;
        public bool selected;
        public DeviceMode deviceMode;
        public GameObject container;
        [Tooltip("背景滑动对齐目标（如 Archery / Gun 按钮节点），不填则使用 container")]
        public RectTransform tabRect;
    }

    public class HomeViewTopBar : MonoBehaviour
    {
        public List<TopBarButtonInfoTMP> topBarButtonInfos;

        public UnityEngine.Events.UnityEvent<DeviceMode> onChangeTypeEvent;

        [Header("背景滑动")]
        [SerializeField] RectTransform btnBg;
        [SerializeField] float btnBgMoveDuration = 0.25f;
        [SerializeField] Ease btnBgMoveEase = Ease.OutCubic;
        [Tooltip("切换时是否同步缩放到 tab 节点尺寸")]
        [SerializeField] bool matchTabSize;

        [Header("背景 Padding")]
        [Tooltip("位置偏移，相对标签本地坐标（X 向右，Y 向上）")]
        [SerializeField] Vector2 btnBgPositionOffset;
        [Tooltip("在标签尺寸基础上向四周扩展（仅 Match Tab Size 开启时生效）")]
        [SerializeField] float btnBgPaddingLeft;
        [SerializeField] float btnBgPaddingRight;
        [SerializeField] float btnBgPaddingTop;
        [SerializeField] float btnBgPaddingBottom;

        static readonly Color32 SelectedIconColor = new Color32(0, 0, 0, 255);
        static readonly Color32 SelectedTextColor = new Color32(48, 57, 57, 255);
        static readonly Color32 UnselectedIconColor = new Color32(255, 255, 255, 255);
        static readonly Color32 UnselectedTextColor = new Color32(141, 150, 151, 255);

        string _saveKey = "DeviceModeKey";
        int _value;
        int _valueDefault;
        Tween _btnBgTween;

        void Start()
        {
            int deviceValue = GetDeviceModeValue();
            if (topBarButtonInfos != null && topBarButtonInfos.Count > 0)
                deviceValue = Mathf.Clamp(deviceValue, 0, topBarButtonInfos.Count - 1);

            GlobalData.MyDeviceMode = (DeviceMode)deviceValue;
            Debug.Log(" GlobalData.MyDeviceMode :" + GlobalData.MyDeviceMode);
            onChangeTypeEvent?.Invoke(GlobalData.MyDeviceMode);

            UpdateTabVisuals(deviceValue);
            StartCoroutine(InitBtnBgPositionAfterLayout(deviceValue));
        }

        IEnumerator InitBtnBgPositionAfterLayout(int index)
        {
            yield return null;
            Canvas.ForceUpdateCanvases();
            MoveBtnBgToTab(index, false);
        }

        void OnDestroy()
        {
            _btnBgTween?.Kill();
            if (btnBg != null)
                btnBg.DOKill();
        }

        public TopBarButtonInfoTMP GetCurrentTopBarButtonInfo()
        {
            return topBarButtonInfos[(int)GlobalData.MyDeviceMode];
        }

        public void onChangeType(int index)
        {
            if (topBarButtonInfos == null || index < 0 || index >= topBarButtonInfos.Count)
                return;

            UpdateTabVisuals(index);
            MoveBtnBgToTab(index, true);

            SetDeviceModeValue(index);
            GlobalData.MyDeviceMode = (DeviceMode)index;
            Debug.Log("Set GlobalData.MyDeviceMode :" + GlobalData.MyDeviceMode);
            onChangeTypeEvent?.Invoke(GlobalData.MyDeviceMode);
        }

        void UpdateTabVisuals(int selectedIndex)
        {
            if (topBarButtonInfos == null) return;

            for (int i = 0; i < topBarButtonInfos.Count; i++)
            {
                TopBarButtonInfoTMP topBarButtonInfo = topBarButtonInfos[i];
                bool isSelected = i == selectedIndex;
                topBarButtonInfo.selected = isSelected;
                ApplyIconVisual(topBarButtonInfo, isSelected);

                if (topBarButtonInfo.text == null)
                    continue;

                topBarButtonInfo.text.color = isSelected ? SelectedTextColor : UnselectedTextColor;
            }
        }

        static void ApplyIconVisual(TopBarButtonInfoTMP info, bool isSelected)
        {
            if (info?.Icon == null)
                return;

            info.Icon.color = isSelected ? SelectedIconColor : UnselectedIconColor;

            Sprite targetSprite = isSelected ? info.selectedIconSprite : info.unselectedIconSprite;
            if (targetSprite != null)
                info.Icon.sprite = targetSprite;
        }

        void MoveBtnBgToTab(int index, bool animate)
        {
            if (btnBg == null || topBarButtonInfos == null || index < 0 || index >= topBarButtonInfos.Count)
                return;

            RectTransform target = GetTabBgTarget(topBarButtonInfos[index]);
            if (target == null)
                return;

            Canvas.ForceUpdateCanvases();
            CalcBtnBgTarget(target, out Vector3 targetPos, out Vector2 targetSize);

            _btnBgTween?.Kill();
            btnBg.DOKill();

            if (animate)
            {
                Sequence seq = DOTween.Sequence();
                seq.Join(btnBg.DOMove(targetPos, btnBgMoveDuration).SetEase(btnBgMoveEase));
                if (matchTabSize)
                    seq.Join(btnBg.DOSizeDelta(targetSize, btnBgMoveDuration).SetEase(btnBgMoveEase));
                _btnBgTween = seq;
            }
            else
            {
                btnBg.position = targetPos;
                if (matchTabSize)
                    btnBg.sizeDelta = targetSize;
            }
        }

        void CalcBtnBgTarget(RectTransform target, out Vector3 worldPos, out Vector2 size)
        {
            Vector2 localCenter = target.rect.center;
            localCenter.x += btnBgPositionOffset.x + (btnBgPaddingRight - btnBgPaddingLeft) * 0.5f;
            localCenter.y += btnBgPositionOffset.y + (btnBgPaddingTop - btnBgPaddingBottom) * 0.5f;

            Vector3 targetWorldCenter = target.TransformPoint(localCenter);
            worldPos = new Vector3(targetWorldCenter.x, targetWorldCenter.y, btnBg.position.z);
            size = new Vector2(
                target.rect.width + btnBgPaddingLeft + btnBgPaddingRight,
                target.rect.height + btnBgPaddingTop + btnBgPaddingBottom);
        }

        RectTransform GetTabBgTarget(TopBarButtonInfoTMP info)
        {
            if (info == null)
                return null;
            if (info.tabRect != null)
                return info.tabRect;
            if (info.container != null)
                return info.container.GetComponent<RectTransform>();
            return null;
        }

        public int GetDeviceModeValue()
        {
            _value = PlayerPrefs.GetInt(_saveKey, _valueDefault);
            return _value;
        }

        public void SetDeviceModeValue(int value)
        {
            _value = value;
            PlayerPrefs.SetInt(_saveKey, _value);
            PlayerPrefs.Save();
        }
    }
}