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

namespace AppUI.Util.TabSwitcher
{

    public class UITabSwitcher : MonoBehaviour
    {
        [System.Serializable]
        public class TabItem
        {
            public string tabId;

            [Header("按钮")]
            public GameObject btn;

            [Header("标题")]
            public TMP_Text label;

            [Header("内容页")]
            public GameObject panel;

            [Header("默认允许显示")]
            public bool defaultVisible = true;
        }

        [SerializeField] List<TabItem> tabs = new();

        [Header("默认Tab")]
        [SerializeField] string defaultTab;

        [Header("文字颜色")]
        [SerializeField] Color selectColor = Color.white;

        [SerializeField]
        Color normalColor = new Color32(153, 153, 153, 255);

        Dictionary<string, TabItem> tabMap = new();

        void Awake()
        {
            Init();
        }
        public void SetDefaultTab(string tabId)
        {
            defaultTab = tabId;
        }
        void Init()
        {
            tabMap.Clear();

            foreach (var tab in tabs)
            {
                if (tab == null || string.IsNullOrEmpty(tab.tabId))
                    continue;

                tabMap[tab.tabId] = tab;

                if (tab.btn != null)
                {
                    tab.btn.SetActive(tab.defaultVisible);

                    // 自动绑定按钮事件
                    Button btn = tab.btn.GetComponent<Button>();

                    if (btn != null)
                    {
                        btn.onClick.RemoveAllListeners();

                        string cacheTabId = tab.tabId;

                        btn.onClick.AddListener(() =>
                        {
                            OnClick_Tab(cacheTabId);
                        });
                    }
                }
            }

            RefreshDefaultTab();
        }

        void RefreshDefaultTab()
        {
            if (string.IsNullOrEmpty(defaultTab))
                return;

            if (tabMap.TryGetValue(defaultTab, out var tab))
            {
                if (tab.btn != null && tab.btn.activeSelf)
                {
                    OnClick_Tab(tab.tabId);
                }
            }
        }

        // ======================================
        // 点击切换
        // ======================================

        public void OnClick_Tab(string tabId)
        {
            foreach (var kv in tabMap)
            {
                bool selected = kv.Key == tabId;

                var tab = kv.Value;

                if (tab.panel != null)
                {
                    tab.panel.SetActive(selected);
                }

                if (tab.label != null)
                {
                    tab.label.color = selected
                        ? selectColor
                        : normalColor;
                }
            }

            AudioMgr.ins?.PlayBtn();
        }

        // ======================================
        // 控制Tab显示
        // ======================================

        public void SetTabVisible(string tabId, bool visible)
        {
            if (!tabMap.TryGetValue(tabId, out var tab))
                return;

            if (tab.btn != null)
            {
                tab.btn.SetActive(visible);
            }

            // 如果当前页被隐藏
            // 自动切换到第一个可见Tab
            if (!visible)
            {
                TrySelectFirstVisibleTab();
            }
        }

        void TrySelectFirstVisibleTab()
        {
            foreach (var tab in tabMap.Values)
            {
                if (tab.btn != null && tab.btn.activeSelf)
                {
                    OnClick_Tab(tab.tabId);
                    return;
                }
            }
        }

        // ======================================
        // 批量设置
        // ======================================

        public void SetVisibleTabs(params string[] allowTabs)
        {
            HashSet<string> set = new HashSet<string>(allowTabs);

            foreach (var kv in tabMap)
            {
                bool visible = set.Contains(kv.Key);

                if (kv.Value.btn != null)
                {
                    kv.Value.btn.SetActive(visible);
                }
            }

            TrySelectFirstVisibleTab();
        }

    }
}