//
// MessageBox.cs
//
// Author:
//       fjy <jiyuan.feng@live.com>
//
// Copyright (c) 2020 fjy
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using ET;
using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Object = UnityEngine.Object;

public class MessageBox : IEnumerator
{
    public bool isOk { get; private set; }

    private bool _visible = true;

    #region IEnumerator implementation

    public bool MoveNext()
    {
        return _visible;
    }

    public void Reset()
    {
    }

    public object Current
    {
        get { return null; }
    }

    #endregion

    private GameObject gameObject { get; set; }

    private Text _title;
    private Text _content;
    private Text _textOk;
    private Text _textNo;

    private static readonly GameObject _prefab = Resources.Load<GameObject>("MessageBox");
    private static readonly List<MessageBox> _showed = new List<MessageBox>();
    private static readonly List<MessageBox> _hidden = new List<MessageBox>();

    public static void Dispose()
    {
        foreach (MessageBox item in _hidden)
        {
            item.Destroy();
        }

        _hidden.Clear(); 

        foreach (MessageBox item in _showed)
        {
            item.Destroy();
        }

        _showed.Clear(); 
    }

    public static void CloseAll()
    {
        for (int index = 0; index < _showed.Count; index++)
        {
            MessageBox messageBox = _showed[index];
            messageBox.Hide();
            _hidden.Add(messageBox);
        }
        _showed.Clear();
    }

    public static MessageBox Show(string title, string content, string ok = "确定", string no = "取消")
    {
        if (_hidden.Count > 0)
        {
            MessageBox mb = _hidden[0];
            mb.Init(title, content, ok, no);
            mb.gameObject.SetActive(true);
            _hidden.RemoveAt(0);
            return mb;
        }
        else
        {
            return new MessageBox(title, content, ok, no);
        }
    }

    private void Destroy()
    {
        _title = null;
        _textOk = null;
        _textNo = null;
        _content = null;
        Object.DestroyImmediate(gameObject);
        gameObject = null;
    }

    private MessageBox(string title, string content, string ok, string no)
    {
        gameObject = Object.Instantiate(_prefab);
        gameObject.name = title;

        _title = GetComponent<Text>("Title");
        _content = GetComponent<Text>("Content/Text");
        _textOk = GetComponent<Text>("Buttons/Ok/Text");
        _textNo = GetComponent<Text>("Buttons/No/Text");

        Button ok1 = GetComponent<Button>("Buttons/Ok");
        Button no1 = GetComponent<Button>("Buttons/No");
        ok1.onClick.AddListener(OnClickOk);
        no1.onClick.AddListener(OnClickNo);

        Init(title, content, ok, no);
    }

    private void Init(string title, string content, string ok, string no)
    {
        _title.text = title;
        _content.text = content;
        _textOk.text = ok;
        _textNo.text = no;
        _showed.Add(this);
        _visible = true;
        isOk = false;
    }

    public Action<MessageBoxEventId> onComplete { get; set; }

    private T GetComponent<T>(string path) where T : Component
    {
        Transform trans = gameObject.transform.Find(path);
        return trans.GetComponent<T>();
    }

    private void OnClickNo()
    {
        HandleEvent(MessageBoxEventId.No);
    }

    private void OnClickOk()
    {
        HandleEvent(MessageBoxEventId.Ok);
    }

    private void HandleEvent(MessageBoxEventId id)
    {
        switch (id)
        {
            case MessageBoxEventId.Ok:
                break;
            case MessageBoxEventId.No:
                break;
            default:
                throw new ArgumentOutOfRangeException("id", id, null);
        }

        Close();

        isOk = id == MessageBoxEventId.Ok;

        if (onComplete == null) return;
        onComplete(id);
        onComplete = null;
    }

    public void Close()
    {
        Hide();
        _hidden.Add(this);
        _showed.Remove(this);
    }

    private void Hide()
    {
        gameObject.SetActive(false);
        _visible = false;
    }
}