using UnityEngine.UI;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Core.Utilities;
using DG.Tweening;

/**
 * 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;

        private Color[] colorArr =
        {
            new Color(1, 0, 0),                   // "#FF0000"
            new Color(1, 165 / 255f, 0),          // "#FFA500"
            new Color(1, 1, 0),                   // "#FFFF00"
            new Color(0, 1, 0),                   // "#00FF00"
            new Color(0, 1, 1),                   // "#00FFFF"
            new Color(0, 0, 1),                   // "#0000FF"
            new Color(128 / 255f, 0, 128 / 255f)  // "#800080"
        };

        /// <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 Text WaveNumText;

        // 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 % colorArr.Length;
        }

        /// <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 % colorArr.Length;
            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 = $"×{wave}";
        }

        /// <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.color = colorArr[index];
                HPImage1.color = Color.white;
            }
            else
            {
                HPImage2.color = colorArr[index];
                HPImage1.color = colorArr[(index + 1) % colorArr.Length];
            }
        }
    }
}