using System;
using System.Collections.Generic;
using UnityEngine;

namespace Thousandto.Launcher.Form
{
    /// <summary>
    /// 语言选择面板
    /// </summary>
    public class UILanguagePanel : IUIInnerPanelBase
    {
        #region //静态成员
        private static Dictionary<string, string> _lanDict;
        public static Dictionary<string, string> LanDict
        {
            get
            {
                if (_lanDict == null)
                {
                    _lanDict = new Dictionary<string, string>();
                    _lanDict.Add("EN", "English");
                    _lanDict.Add("TH", "ภาษาไทย");
                    _lanDict.Add("CH", "中文");
                    _lanDict.Add("TW", "中文繁体");
                    _lanDict.Add("KR", "한글");
                    _lanDict.Add("VIE", "Tiếng Việt");
                }

                return _lanDict;
            }
        }
        #endregion
        
        //确认按钮
        private UIButton _okBtn;
        //滚动视图
        private UIScrollView _scrollView;
        //网格
        private UIGrid _grid;
        //模板
        private Transform _template;
        //选择列表
        private List<UIToggle> _toggleList = new List<UIToggle>();
        //关闭回调
        private Action<string> _callBack = null;
        //当前选择的语言
        private string _currentLan;
        //语言列表
        private string[] _lans;
     
        //设置数据
        public void SetData(string[] lans,Action<string> callBack)
        {
            _lans = lans;
            _callBack = callBack;
        }

        protected override void OnInitialize()
        {
            _scrollView = Trans.Find("ScrollView").GetComponent<UIScrollView>();
            _grid = Trans.Find("ScrollView/Grid").GetComponent<UIGrid>();
            _template = Trans.Find("ScrollView/Grid/Temp");
            _okBtn = Trans.Find("OkBtn").GetComponent<UIButton>();

            _template.gameObject.SetActive(false);

            _okBtn.onClick.Clear();
            EventDelegate.Add(_okBtn.onClick, OnClickOkBtn);

            InitScrollView();
        }

        protected override void OnRefresh()
        {
            for (int i = 0; i < _toggleList.Count; i++)
            {
                if (_lans != null && Array.IndexOf(_lans, _toggleList[i].gameObject.name) >= 0)
                {
                    _toggleList[i].gameObject.SetActive(true);
                }
                else
                {
                    _toggleList[i].gameObject.SetActive(false);
                }
            }
        }

        protected override void OnHideAfter()
        {
            if (_callBack != null) _callBack(_currentLan);
            base.OnHideAfter();
        }

        private void InitScrollView()
        {
            _toggleList.Clear();
            var e = LanDict.GetEnumerator();
            while (e.MoveNext())
            {
                var go = NGUITools.AddChild(_grid.gameObject, _template.gameObject);
                go.SetActive(true);
                go.AddComponent<UIDragScrollView>().scrollView = _scrollView;

                var toggle = go.GetComponent<UIToggle>();
                _toggleList.Add(toggle);
                toggle.group = 1;
                toggle.startsActive = false;

                var textLabel = go.transform.Find("Label").GetComponent<UILabel>();
                textLabel.text = e.Current.Value;
                go.name = e.Current.Key;

                toggle.onChange.Clear();
                EventDelegate.Add(toggle.onChange, OnToggleChange);
            }
            _grid.Reposition();

            if (_toggleList.Count > 0)
                _toggleList[0].Set(true);
        }

        private void OnClickOkBtn()
        {
            Hide();
        }

        private void OnToggleChange()
        {
            var current = UIToggle.current;
            if (current.value)
            {
                _currentLan = current.gameObject.name;
            }
        }
    }
}