using UnityEngine;
using System.Collections;
using LitJson;
public class CommunicationCenter : MonoBehaviour 
{
	public static CommunicationCenter Instance;
	
	public GameObject smallCamera;
	public Transform allyPrefeb;

	private string missionName;
	private string description;
	
	public enum ShipLimit{NO_LIMIT,LIMIT};
	private ShipLimit shipLimit;
	private int haveToKill;

	//RESIST: resist fixed time to win.
	//LIMIT: should finish in fixed time.
	public enum TimeLimit{NO_LIMIT,RESIST,LIMIT};
	public TimeLimit timeLimit;
	private int resistTime;

	private float smallCameraShowTime = 0;

	private TimeWindow timeWindow;

	private bool finished = false;

	private int allies;
	void Awake()
	{
		Instance = this;
	}
	void Start()
	{
		timeWindow = TimeWindow.Instance;
		if(GlobalObject.Instance!=null)
		{
			LoadDataOfMission(GlobalObject.Instance.nowLevel);
		}
		if(EnemyPool.Instance!=null)
		{
			EnemyPool.Instance.StartGame();
		}

		for(int i=0;i<allies;i++)
		{
			Transform tp = Instantiate(allyPrefeb)as Transform;
			tp.tag = "Ally";
		}
	}
	void LoadDataOfMission(int missionID)
	{
		try
		{
			haveToKill = 0;
			TextAsset ta = Resources.Load("Json/mission")as TextAsset;
			JsonData jd = JsonMapper.ToObject(ta.text);
			jd = jd["missions"];
			JsonData missionData = jd[missionID];
			missionName = missionData["name"].ToString();
			description = missionData["description"].ToString();
			JsonData enemies = missionData["enemies"];
			for(int i=0;i<enemies.Count;i++)
			{
				int cnt = int.Parse(enemies["type"+i].ToString());
				haveToKill += cnt;
				EnemyPool.Instance.InsertEnemy(i,cnt);
			}
			allies = int.Parse(missionData["allies"].ToString());

			JsonData subMission = missionData["submissions"];
			int kill = int.Parse(subMission["kill-enemy-number"].ToString());
			if(kill==0)
			{
				shipLimit = ShipLimit.NO_LIMIT;
			}
			else
			{
				shipLimit = ShipLimit.LIMIT;
			}
			resistTime = int.Parse(subMission["time"].ToString());
			if(resistTime <0)
			{
				resistTime = -resistTime;
				timeWindow.timeToShow = resistTime;
				timeWindow.direction = -1;
				timeLimit = TimeLimit.LIMIT;
			}
			else if(resistTime>0)
			{
				timeWindow.timeToShow = resistTime;
				timeWindow.direction = -1;
				timeLimit = TimeLimit.RESIST;
			}
			else
			{
				timeWindow.timeToShow = 0;
				timeWindow.direction = 1;
				timeLimit = TimeLimit.NO_LIMIT;
			}

			MessageWindow.Instance.NewMessage(missionName);
			MessageWindow.Instance.NewMessage(description);

		}
		catch(JsonException e)
		{
			Debug.Log(e.Message);
		}
	}

	void Update()
	{
		smallCameraShowTime-=Time.deltaTime;
		if(smallCameraShowTime<0)
		{
			ShowSmallCamera(false);
		}
		if(!finished)
		{
			CheckTask();
		}
	}

	public void DestroyOneEnemy(int id)
	{
		EnemyPool.Instance.DestroyOneEnemy(id);
		ShowSmallCamera(true);
		MessageWindow.Instance.NewMessage("An enemy ship has been destroyed!");
		haveToKill--;
	}

	public void AllyDestroyOneEnemy(int id)
	{
		EnemyPool.Instance.DestroyOneEnemy(id);
		ShowSmallCamera(true);
		MessageWindow.Instance.NewMessage("An ally destroyed one enemy ship!");
		haveToKill--;
	}

	public void ShowSmallCamera(bool show)
	{
		if(smallCamera.activeSelf!=show)
		{
			smallCamera.SetActive(show);
		}
		if(show)
		{
			smallCameraShowTime = 5;
		}
	}

	void CheckTask()
	{
		if (!EnemyPool.Instance) return;

		if(EnemyPool.Instance.aliveEnemy<=0)
		{
			WinGame();
			return;
		}
		if(timeLimit==TimeLimit.RESIST && timeWindow.timeToShow<=0 && haveToKill<=0)
		{
			WinGame();
			return;
		}
		if(timeLimit==TimeLimit.LIMIT && timeWindow.timeToShow <= 0)
		{
			FailGame();
			return;
		}
		if((timeLimit==TimeLimit.NO_LIMIT || timeLimit==TimeLimit.LIMIT) && haveToKill<=0)
		{
			WinGame();
			return;
		}
	}

	public void WinGame()
	{
		finished = true;
		SU_Spaceship ship = GameManager.Instance.spaceShip.GetComponent<SU_Spaceship>();
		ship.Finish();
		GlobalObject.Instance.WinThisLevel(true);
	}

	public void FailGame()
	{
		finished = true;
		if(GameManager.Instance.spaceShip!=null)
		{
			GameManager.Instance.spaceShip.gameObject.SetActive(false);
		}
		GlobalObject.Instance.WinThisLevel(false);
	}
}