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

public class Toast : MonoBehaviour {

	public enum Type
	{
		Text,
	}

	public RectTransform panelTrans;
	public Image panelBg;
	public Text textUI;
	public Animator animator;

	public float duration = 2f;
	private float startShowTime = -1f;

	private float hiddingDuration = 0.5f;
	private float startHiddingTime = -1;

	public string text
	{
		set
		{
			textUI.text = value;
		}
		get
		{
			return textUI.text;
		}
	}

	public Type type;
	public bool useQueue;

    void Awake()
    {
        panelTrans = transform.FindChild("Panel").GetComponent<RectTransform>();
        panelBg = panelTrans.FindChild("Container").GetComponent<Image>();
        textUI = panelBg.transform.FindChild("Text").GetComponent<Text>();
		animator = GetComponent<Animator>();
        type = Type.Text;
    }

	void Start()
	{
		Show();
	}

	public void Show()
	{
		if(useQueue)
		{
			if(toastQueue.Count > 0)
			{
				if(toastQueue[0] != this)
				{
					toastQueue.Add(this);
					return;
				}
			}
			else
			{
				toastQueue.Add(this);
			}
		}
		else
		{
			while(toastNoQueueList.Count > 0)
			{
				Toast toast = toastNoQueueList[0];
				toastNoQueueList.Remove(toast);
				Destroy(toast.gameObject);
			}
			toastNoQueueList.Add(this);
		}

        PopUpManager.AddToMainCanvas(gameObject);

		if(type == Type.Text)
		{
			animator.Play("ToastShow", 0, 0);
		}

		startShowTime = GameTime.time;
	}


	void Update()
	{
		if(startHiddingTime >= 0)
		{
			if(GameTime.time - startHiddingTime >= hiddingDuration)
			{
				toastQueue.Remove(this);
				if(toastQueue.Count > 0)
				{
					toastQueue[0].Show();
				}
				if(!useQueue)
					toastNoQueueList.Remove(this);
				Destroy(this.gameObject);
			}
		}
		else if(startShowTime >= 0)
		{
			if(type == Type.Text)
			{
				if(GameTime.time - startShowTime >= duration)
				{
					startHiddingTime = GameTime.time;

					animator.Play("ToastHide", 0, 0);
				}
			}
		}
	}


	private static List<Toast> toastQueue = new List<Toast>();
	private static List<Toast> toastNoQueueList = new List<Toast>();

	public static Toast MakeText(string text, bool useQueue=false)
	{
		GameObject toastObj = GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("Prefabs/UI/Toast"));
		Toast toast = toastObj.GetComponent<Toast>();
		toast.text = text;
		toast.type = Type.Text;
		toast.useQueue = useQueue;
		
		return toast;
	}
}