using UnityEngine.UI;
using UnityEngine;
using Core.Utilities;
using DG.Tweening;
using TMPro;

/**
 * 无尽模式boss血量管理器
 * @Author: chenxin
 * @Date: 2020-10-16 20:00:56
 */
namespace KTGMGemClient
{
    public class EndlessBossHPManager : Singleton<EndlessBossHPManager>
    {
        /// <summary>
        /// 血条1
        /// </summary>
        public Image HPImage1;

        /// <summary>
        /// 血条2
        /// </summary>
        public Image HPImage2;

        /// <summary>
        /// boss形象
        /// </summary>
        public Image BossImage;

        private string path = "UI/Endless/Blood/";

        private string bossPath = "UI/Endless/Boss/";

        /// <summary>
        /// 血条底图
        /// </summary>
        public Sprite BaseBlood;

        /// <summary>
        /// 当前的进度值
        /// </summary>
        private float current;

        /// <summary>
        /// 目标进度值
        /// </summary>
        private float target;

        /// <summary>
        /// 血条消失速度
        /// </summary>
        public float Speed = 50f;

        /// <summary>
        /// 当前颜色索引
        /// </summary>
        private int index;

        private Tween tween;

        public TextMeshProUGUI WaveNumText;

        /// <summary>
        /// 血条7种颜色
        /// </summary>
        private int count = 7;

        /// <summary>
        /// boss信息，名字和等级
        /// </summary>
        public Text BossInfo;

        // Start is called before the first frame update
        private void Start()
        {
            InitHP();
        }

        /// <summary>
        /// 显示血条
        /// </summary>
        public void ShowHP()
        {
            gameObject.SetActive(true);
        }

        /// <summary>
        /// 隐藏血条
        /// </summary>
        public void HideHP()
        {
            gameObject.SetActive(false);
        }

        /// <summary>
        /// 设置当前进度百分比
        /// </summary>
        /// <param name="progress"></param>
        public void SetCurrentProgress(float progress)
        {
            target = progress;
            tween = DOTween.To(() => HPImage2.fillAmount, (v) => HPImage2.fillAmount = v, target, 0.3f);
            tween.Play();
        }

        /// <summary>
        /// 重置进度
        /// </summary>
        private void ResetProgress()
        {
            current = 1f;
            target = 1f;
            HPImage1.fillAmount = 1;
            HPImage2.fillAmount = 1;
            index = index % count;
        }

        /// <summary>
        /// 切换血条显示
        /// </summary>
        /// <param name="end"></param>
        public void SwitchHP(bool end = false)
        {
            tween.Pause();
            HPImage2.fillAmount = 0;
            index = ++index % count;
            ChangeHPImageIndex();
            ResetProgress();
            SetHPColor(end);
        }

        /// <summary>
        /// 初始化血条
        /// </summary>
        public void InitHP()
        {
            index = 0;
            ResetProgress();
            SetHPColor();
        }

        /// <summary>
        /// 更新波次
        /// </summary>
        /// <param name="wave"></param>
        public void UpdateWave(int wave)
        {
            WaveNumText.text = $"x{wave}";
        }

        /// <summary>
        /// 设置boss信息
        /// </summary>
        /// <param name="info"></param>
        public void SetBossInfo(string info)
        {
            BossInfo.text = info;
        }

        /// <summary>
        /// 切换两血条的显示层级
        /// </summary>
        private void ChangeHPImageIndex()
        {
            int index1 = HPImage1.transform.GetSiblingIndex();
            int index2 = HPImage2.transform.GetSiblingIndex();
            HPImage1.transform.SetSiblingIndex(index2);
            HPImage2.transform.SetSiblingIndex(index1);
            // 始终保持 HPImage2在上面
            Image tmp = HPImage1;
            HPImage1 = HPImage2;
            HPImage2 = tmp;
        }

        /// <summary>
        /// 设置血条颜色
        /// </summary>
        /// <param name="end">是否是最终的血条显示</param>
        private void SetHPColor(bool end = false)
        {
            if (end)
            {
                HPImage2.sprite = GetSprite(index);
                HPImage1.sprite = Resources.Load($"{path}di", typeof(Sprite)) as Sprite;
            }
            else
            {
                HPImage2.sprite = GetSprite(index);
                HPImage1.sprite = GetSprite((index + 1) % count);
            }
        }

        /// <summary>
        /// 根据索引获得sprite
        /// </summary>
        /// <param name="index"></param>
        private Sprite GetSprite(int index)
        {
            return Resources.Load($"{path}{index}", typeof(Sprite)) as Sprite;
        }

        /// <summary>
        /// 设置boss形象
        /// </summary>
        /// <param name="resId"></param>
        public void SetBossImage(int resId)
        {
            resId = (resId + 1) % 2 + 1;
            BossImage.sprite = Resources.Load<Sprite>($"{bossPath}{resId}");
            BossImage.SetNativeSize();
        }
    }
}