//------------------------------------------------------------
// Game Framework v3.x
// Copyright © 2013-2017 Jiang Yin. All rights reserved.
// Homepage: http://gameframework.cn/
// Feedback: mailto:jiangyin@gameframework.cn
//------------------------------------------------------------

using GameFramework;
using System;
using System.Collections.Generic;
#if UNITY_EDITOR
using UnityEditor;
#endif
using UnityEngine;
using UnityEngine.SceneManagement;

namespace UnityGameFramework.Runtime
{
 /// <summary>
 /// 游戏入口。
 /// </summary>
 public static class GameEntry
 {
 private const string UnityGameFrameworkVersion = "3.0.6";
 private static readonly LinkedList<GameFrameworkComponent> s_GameFrameworkComponents = new LinkedList<GameFrameworkComponent>();

 /// <summary>
 /// 游戏框架所在的场景编号。
 /// </summary>
 internal const int GameFrameworkSceneId = 0;

 /// <summary>
 /// 获取 Unity 游戏框架版本号。
 /// </summary>
 public static string Version
 {
 get
 {
 return UnityGameFrameworkVersion;
 }
 }

 /// <summary>
 /// 获取游戏框架组件。
 /// </summary>
 /// <typeparam name="T">要获取的游戏框架组件类型。</typeparam>
 /// <returns>要获取的游戏框架组件。</returns>
 public static T GetComponent<T>() where T : GameFrameworkComponent
 {
 return (T)GetComponent(typeof(T));
 }

 /// <summary>
 /// 获取游戏框架组件。
 /// </summary>
 /// <param name="type">要获取的游戏框架组件类型。</param>
 /// <returns>要获取的游戏框架组件。</returns>
 public static GameFrameworkComponent GetComponent(Type type)
 {
 LinkedListNode<GameFrameworkComponent> current = s_GameFrameworkComponents.First;
 while (current != null)
 {
 if (current.Value.GetType() == type)
 {
 return current.Value;
 }

 current = current.Next;
 }

 return null;
 }

 /// <summary>
 /// 获取游戏框架组件。
 /// </summary>
 /// <param name="typeName">要获取的游戏框架组件类型名称。</param>
 /// <returns>要获取的游戏框架组件。</returns>
 public static GameFrameworkComponent GetComponent(string typeName)
 {
 LinkedListNode<GameFrameworkComponent> current = s_GameFrameworkComponents.First;
 while (current != null)
 {
 Type type = current.Value.GetType();
 if (type.FullName == typeName || type.Name == typeName)
 {
 return current.Value;
 }

 current = current.Next;
 }

 return null;
 }

 /// <summary>
 /// 关闭游戏框架。
 /// </summary>
 /// <param name="shutdownType">关闭游戏框架类型。</param>
 public static void Shutdown(ShutdownType shutdownType)
 {
 Log.Info("Shutdown Game Framework ({0})...", shutdownType.ToString());
 BaseComponent baseComponent = GetComponent<BaseComponent>();
 if (baseComponent != null)
 {
 baseComponent.Shutdown();
 baseComponent = null;
 }

 s_GameFrameworkComponents.Clear();

 if (shutdownType == ShutdownType.None)
 {
 return;
 }

 if (shutdownType == ShutdownType.Restart)
 {
 SceneManager.LoadScene(GameFrameworkSceneId);
 return;
 }

 if (shutdownType == ShutdownType.Quit)
 {
 Application.Quit();
#if UNITY_EDITOR
 EditorApplication.isPlaying = false;
#endif
 return;
 }
 }

 /// <summary>
 /// 注册游戏框架组件。
 /// </summary>
 /// <param name="gameFrameworkComponent">要注册的游戏框架组件。</param>
 internal static void RegisterComponent(GameFrameworkComponent gameFrameworkComponent)
 {
 if (gameFrameworkComponent == null)
 {
 Log.Error("Game Framework component is invalid.");
 return;
 }

 Type type = gameFrameworkComponent.GetType();

 LinkedListNode<GameFrameworkComponent> current = s_GameFrameworkComponents.First;
 while (current != null)
 {
 if (current.Value.GetType() == type)
 {
 Log.Error("Game Framework component type '{0}' is already exist.", type.FullName);
 return;
 }

 current = current.Next;
 }

 s_GameFrameworkComponents.AddLast(gameFrameworkComponent);
 }
 }
}