using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using UnityEngine;

namespace Stary.Evo.UIFarme
{
    public interface IPanelSystem : ISystem
    {
        /// <summary>
        /// UI的入栈操作，此操作会显示一个面板
        /// </summary>
        Task PushQueue<T>(Transform parent=null,string packageName=null) where T : IBasePanel, new();

        /// <summary>
        /// UI的入栈操作，此操作会显示一个面板
        /// </summary>
        Task PushStack<T>(Transform parent=null,string packageName=null) where T : IBasePanel, new();

        /// <summary>
        /// 执行面板的出栈操作，此操作会执行面板的OnExit方法
        /// </summary>
        void PopQueue<T>() where T : IBasePanel, new();

        /// <summary>
        /// 执行面板的出栈操作，此操作会执行面板的OnExit方法
        /// </summary>
        void PopStack();

        /// <summary>
        /// 面板全部出栈此操作会执行面板的OnExit方法
        /// </summary>
        void PopAll();
        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent>(TEvent key) where TEvent : IConvertible;

        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent, Tvalue1>(TEvent key, Tvalue1 value) where TEvent : IConvertible;

        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent, Tvalue1, Tvalue2>(TEvent key, Tvalue1 value1, Tvalue2 value2)
            where TEvent : IConvertible;

        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent, Tvlue1, Tvlue2, Tvlue3>(TEvent key, Tvlue1 value1, Tvlue2 vlue2, Tvlue3 vlue3)
            where TEvent : IConvertible;
        /// <summary>
        /// 返回存储面板实例的字典
        /// </summary>
        /// <returns></returns>
        Dictionary<string, IBasePanel> Get_Dic();

        IBasePanel GetPanel(string PanelName);
    }

    /// <summary>
    /// 面板管理器，用栈来存储UI
    /// </summary>
    public class PanelSystem : AbstractSystem, IPanelSystem
    {
        /// <summary>
        /// 存储普通UI面板
        /// </summary>
        private List<IBasePanel> queuePanel;

        /// <summary>
        /// 存储堆栈UI面板
        /// </summary>
        private Stack<IBasePanel> stackPanel;

        /// <summary>
        /// 存储所有UI信息的字典，每个UI信息都会对应一个GameObject
        /// </summary>
        private Dictionary<string, IBasePanel> dicUI;


        protected override void OnInit()
        {
            stackPanel = new Stack<IBasePanel>();
            queuePanel = new List<IBasePanel>();
            dicUI = new Dictionary<string, IBasePanel>();
        }

        /// <summary>
        /// UI的入栈操作，此操作会显示一个面板
        /// </summary>
        /// <param name="parent"></param>
        /// <param name="packageName">非热更模式传null</param>
        /// <typeparam name="T"></typeparam>
        public async Task PushQueue<T>(Transform parent=null,string packageName=null) where T : IBasePanel, new()
        {
            string panelName = typeof(T).Name;

            IBasePanel nextPanel = null;
            if (!dicUI.ContainsKey(panelName))
            {
                nextPanel = new T();
                nextPanel.Initialize(this);
                nextPanel.SetPanelParent(parent);
                GameObject panelGo = await nextPanel.CreatePanel($"Prefabs_{panelName}",packageName);
                ///生成面板后，进行初始化操作
                nextPanel.Initialize(panelGo);
                dicUI.Add(panelName, nextPanel);
            }
            else
            {
                for (int i = 0; i < queuePanel.Count; i++)
                {
                    if (queuePanel[i].GetType().Name == panelName)
                    {
                        return;
                    }
                }

                nextPanel = dicUI[panelName];
            }

            queuePanel.Add(nextPanel);
            nextPanel.OnEnter();
            //TOOD
        }

        /// <summary>
        /// UI的入栈操作，此操作会显示一个面板
        /// </summary>
        /// <param name="parent"></param>
        /// <param name="packageName">非热更模式传null</param>
        /// <typeparam name="T"></typeparam>
        public async Task PushStack<T>(Transform parent=null,string packageName=null) where T : IBasePanel, new()
        {
            string panelName = typeof(T).Name;

            IBasePanel nextPanel = null;
            if (!dicUI.ContainsKey(panelName))
            {
                nextPanel = new T();
                nextPanel.Initialize(this);
                nextPanel.SetPanelParent(parent);
                GameObject panelGo = await nextPanel.CreatePanel($"Prefabs_{panelName}",packageName);
                ///生成面板后，进行初始化操作
                nextPanel.Initialize(panelGo);

                dicUI.Add(panelName, nextPanel);
            }
            else
            {
                for (int i = 0; i < stackPanel.Count; i++)
                {
                    if (queuePanel[i].GetType().Name == panelName)
                    {
                        return;
                    }
                }

                nextPanel = dicUI[panelName];
            }

            stackPanel.Push(nextPanel);
            nextPanel.OnEnter();
        }

  

        public void PopQueue<T>() where T : IBasePanel, new()
        {
            string panelName = typeof(T).Name;

            for (int i = 0; i < queuePanel.Count; i++)
            {
                if (queuePanel[i].GetType().Name == panelName)
                {
                    queuePanel[i].OnExit();
                    queuePanel.RemoveAt(i);
                }
            }
        }

        public void PopStack()
        {
            if (stackPanel.Count > 0)
            {
                stackPanel.Pop().OnExit();
            }

            if (stackPanel.Count > 0)
            {
                stackPanel.Peek().OnResume();
            }
        }

        public void PopAll()
        {
            while (stackPanel.Count > 0)
                stackPanel.Pop().OnExit();
            foreach (var panel in queuePanel)
            {
                panel.OnExit();
            }

            queuePanel.Clear();
        }
        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent>(TEvent key) where TEvent : IConvertible
        {
            this.SendEvent(key);
        }

        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent, Tvalue1>(TEvent key, Tvalue1 value) where TEvent : IConvertible
        {
            this.SendEvent(key,value);
        }

        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent, Tvalue1, Tvalue2>(TEvent key, Tvalue1 value1, Tvalue2 value2)
            where TEvent : IConvertible
        {
            this.SendEvent(key, value1, value2);
        }

        /// <summary>
        /// 事件发送
        /// </summary>
        /// <typeparam name="T"></typeparam>
        public void SendPanelEvent<TEvent, Tvlue1, Tvlue2, Tvlue3>(TEvent key, Tvlue1 value1, Tvlue2 vlue2, Tvlue3 vlue3)
            where TEvent : IConvertible
        {
            this.SendEvent(key, value1, vlue2, vlue3);
        }

  
        public Dictionary<string, IBasePanel> Get_Dic()
        {
            if (dicUI.Count > 0)
            {
                return dicUI;
            }

            return null;
        }

        public IBasePanel GetPanel(string PanelName)
        {
            if (dicUI.ContainsKey(PanelName))
            {
                return dicUI[PanelName];
            }

            return null;
        }

        public override void Dispose()
        {
            PopAll();
            stackPanel = null;
            queuePanel =null;
            dicUI = null;
        }
    }
}