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

namespace MoreMountains.Tools
{
    /// <summary>
    /// This class will let you trigger a OnRandomInterval event periodically, at random intervals
    /// </summary>
    public class MMPeriodicExecution : MonoBehaviour
    {
        /// the min and max duration of the interval between two events, in seconds
        [MMVector("Min", "Max")]
        public Vector2 RandomIntervalDuration = new Vector2(1f, 3f);
        /// the event to play at the end of each interval 
        public UnityEvent OnRandomInterval;
        
        protected float _lastUpdateAt = 0f;
        protected float _currentInterval = 0f;
        
        /// <summary>
        /// On Start we initialize our interval duration
        /// </summary>
        protected virtual void Start()
        {
            DetermineNewInterval();
        }
        
        /// <summary>
        /// On Update we check if we've reached the end of an interval
        /// </summary>
        protected virtual void Update()
        {
            if (Time.time - _lastUpdateAt > _currentInterval)
            {
                OnRandomInterval?.Invoke();
                _lastUpdateAt = Time.time;
                DetermineNewInterval();
            }
        }

        /// <summary>
        /// Randomizes a new duration
        /// </summary>
        protected virtual void DetermineNewInterval()
        {
            _currentInterval = Random.Range(RandomIntervalDuration.x, RandomIntervalDuration.y);
        }
    }
}