using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;

namespace game
{
    public class LongPressStuffBase : MonoBehaviour
    {
        [Tooltip("物品ID")]
        public int ID = 0;

        [Tooltip("需要消耗的时间")]
        [SerializeField] protected float m_ConsumeTime = 3f;

        [Tooltip("是否需要呼吸变色功能，默认开启。")]
        public bool m_IsBreathing = true;

        [Tooltip("需要改变颜色的渲染器")]
        public Renderer[] m_Renderers = null;

        [Tooltip("吸气时间")]
        public float m_BreatheInTime = 1f;

        [Tooltip("呼气时间")]
        public float m_BreatheOutTime = 1f;

        [Tooltip("憋气时间")]
        public float m_HoldBreathTime = 2f;

        [Tooltip("颜色")]
        public Color m_Color = Color.red;

        #region 外部接口
        /// <summary>
        /// 进度
        /// </summary>
        public float Progress
        {
            get
            {
                if (m_Status == EventWashingActionStatus.Executing || m_Status == EventWashingActionStatus.Stopping)
                    return m_CumulativeTime / m_ConsumeTime;
                else if (m_Status == EventWashingActionStatus.Ending)
                    return 1f;
                return 0f;
            }
        }

        public float CumulativeConsumeTime
        {
            get 
            { 
                if (m_CumulativeTime < 0f)
                {
                    m_CumulativeTime = 0f;
                }
                else if (m_CumulativeTime > m_ConsumeTime)
                {
                    m_CumulativeTime = m_ConsumeTime;
                }
                return m_CumulativeTime; 
            }
        }

        /// <summary>
        /// 启动操作
        /// </summary>
        /// <param name="overAction"></param>
        public virtual void StartAction(UnityAction<LongPressStuffBase> overAction)
        {
            m_Status = EventWashingActionStatus.Executing;
            m_OverAction = overAction;
        }

        /// <summary>
        /// 停止操作
        /// </summary>
        public virtual void StopAction()
        {
            m_Status = EventWashingActionStatus.Stopping;
        }

        /// <summary>
        /// 设置已经执行过的时间
        /// </summary>
        /// <param name="time"></param>
        public void SetHaveExecutedTime(float time)
        {
            m_CumulativeTime = time;
        }

        /// <summary>
        /// 设置结束
        /// </summary>
        public void SetOver()
        {
            m_CumulativeTime = m_ConsumeTime;
        }

        public bool IsOver()
        {
            return m_Status == EventWashingActionStatus.Ending;
        }
        #endregion

        #region 材质球处理相关

        private float m_Time = 0f;

        private Color m_StartColor = Color.white;
        private Color m_GapColor = Color.white;

        private int m_State = 0;
        
        public virtual void StartBreathing()
        {
            m_IsBreathing = true;
        }
        public virtual void StopBreathing()
        {
            m_IsBreathing = false;
        }

        private void InitMaterials()
        {
            if (m_Renderers == null) return;
            m_GapColor = m_Color - m_StartColor;
        }
        private void UpdateMaterials()
        {
            if (m_Renderers == null || !m_IsBreathing) return;

            if (m_State == 0)
            {
                m_Time += Time.deltaTime;
                if (m_Time >= m_BreatheInTime)
                {
                    m_Time = m_BreatheOutTime;
                    m_State = 1;
                }
            }
            else if (m_State == 1)
            {
                m_Time -= Time.deltaTime;
                if (m_Time <= 0f)
                {
                    m_Time = 0f;
                    m_State = 2;
                }
            }
            else if (m_State == 2)
            {
                m_Time += Time.deltaTime;
                if (m_Time >= m_HoldBreathTime)
                {
                    m_Time = 0f;
                    m_State = 0;
                }
            }

            Color color = Color.white;
            if (m_State == 0 || m_State == 1)
            {
                float scale = m_Time / m_BreatheInTime;
                color = m_StartColor + scale * m_GapColor;
            }

            foreach (var renderer in m_Renderers)
            {
                int count = renderer.materials.Length;
                for (int i = 0; i < count; i++)
                {
                    Material material = renderer.materials[i];
                    material.SetColor("_BaseColor", color);
                }
            }
        }
        #endregion

        #region 事件
        protected UnityAction<LongPressStuffBase> m_OverAction = null;   // 结束事件
        #endregion

        #region 状态&内部使用
        protected EventWashingActionStatus m_Status = EventWashingActionStatus.Invalid;   // 状态
        protected float m_CumulativeTime = 0f; // 累计时间

        protected EventWashingStuffType m_Type = 0;                                                 // 物品类型

        public float ConsumeTime { get => m_ConsumeTime; }

        public void SetStatus(EventWashingActionStatus status)
        {
            m_Status = status;
        }

        protected virtual void UpdateState()
        {
            if (m_Status == EventWashingActionStatus.Executing)
            {
                m_CumulativeTime += Time.deltaTime;
                if (m_CumulativeTime >= m_ConsumeTime)
                {
                    m_CumulativeTime = m_ConsumeTime;
                    m_Status = EventWashingActionStatus.Ending;
                    if (m_OverAction != null)
                    {
                        m_OverAction.Invoke(this);
                    }
                }
            }
        }
        #endregion

        #region 生命周期
        /// <summary>
        /// 初始化
        /// </summary>
        public virtual void InitStuff()
        {
            InitMaterials();
        }

        // Start is called before the first frame update
        protected virtual void Start()
        {
            InitStuff();
            m_Status = EventWashingActionStatus.Invalid;
        }

        // Update is called once per frame
        protected virtual void Update()
        {
            UpdateState();

            UpdateMaterials();
        }
        #endregion
    }
}