using System.Collections;
using System.Collections.Generic;

using UnityEngine;
using UnityEngine.UI;
[RequireComponent(typeof(Image))]

public class UIFrame : MonoBehaviour {
    [SerializeField]
    private string frameKey = string.Empty;

    private List<Sprite> sprites = null;

    private int index = 0;

    private bool run = false;

    private Image m_Image;

    private float m_Interval = 0.1f;

    private int loopCount = 0;  //0表示无限循环

    private void Awake()
    {
        m_Image = GetComponent<Image>();
    }

    private void OnEnable()
    {
        Run();
    }

    public void ResetFrame(string key)
    {
        TimeMgr.Instance.UnRegister(m_Image);
        frameKey = key;
        Run();
    }

    void Run()
    {
        if (m_Image==null||frameKey.Equals(string.Empty)) return;
        if (!gameObject.activeInHierarchy) {
            return;
        }
        sprites = UIFrameMgr.Inst.GetDynamicImage(frameKey);
        if (sprites == null||sprites.Count<1) {
            Debug.LogError(string.Format("没有{0}对应的帧动画", frameKey));
            enabled = false;
            return;
        }

        run = true;
        int timeLoopCount = loopCount * sprites.Count;  //计算总循环次数 动画的一个循环是所有图片播放一遍

        m_Image.overrideSprite = sprites[0];
        if (sprites.Count == 1)
            return;

        index = 1;

        FrameAnimationConfig cfg = FrameAnimationConfig.Get(frameKey);
        if (cfg != null&& cfg.speed > 0) {
            m_Interval = 1.0f / cfg.speed;
        }


        TimeMgr.Instance.Register(m_Image, OnSpriteAnim, m_Interval, timeLoopCount);
    }

    void OnSpriteAnim(Component comp)
    {
        if (!run) return;

        if (!TimeMgr.Instance.IsRegister(comp))
        {
            this.SetActive(false);
            return;
        }

        if (sprites==null) {
            TimeMgr.Instance.UnRegister(m_Image);
            return;
        }
        if (index < 0 || index >= sprites.Count) {
            index = 0;return;
        }
        m_Image.overrideSprite = sprites[index];
        index++;
        if (index >= sprites.Count) 
            index = 0;
    }

    public void SetLoopCount(int count)
    {
        loopCount = count;
    }


    private void OnDisable()
    {
        run = false;
        TimeMgr.Instance.UnRegister(m_Image);
    }
}