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

namespace MoreMountains.Tools
{
    /// <summary>
    /// A data class to store auto execution info to be used in MMAutoExecution
    /// </summary>
    [System.Serializable]
    public class MMAutoExecutionItem
    {
        /// if this is true, Event will be invoked on Awake  
        public bool AutoExecuteOnAwake;
        /// if this is true, Event will be invoked on Enable
        public bool AutoExecuteOnEnable;
        /// if this is true, Event will be invoked on Disable
        public bool AutoExecuteOnDisable;
        /// if this is true, Event will be invoked on Start
        public bool AutoExecuteOnStart;
        /// if this is true, Event will be invoked on Instantiate (you'll need to send a OnInstantiate message for this to happen
        public bool AutoExecuteOnInstantiate;
        public UnityEvent Event;
    }
    
    /// <summary>
    /// This simple class lets you trigger Unity events automatically, on Awake, Enable, Disable, Start, or on instantiate
    /// For that last one, you'll want to send a "OnInstantiate" message when instantiating this object
    /// </summary>
    public class MMAutoExecution : MonoBehaviour
    {
        /// a list of events to trigger automatically
        public List<MMAutoExecutionItem> Events;

        /// <summary>
        /// On Awake we invoke our events if needed
        /// </summary>
        protected virtual void Awake()
        {
            foreach (MMAutoExecutionItem item in Events)
            {
                if ((item.AutoExecuteOnAwake) && (item.Event != null))
                {
                    item.Event.Invoke();
                }
            }
        }
        
        /// <summary>
        /// On Start we invoke our events if needed
        /// </summary>
        protected virtual void Start()
        {
            foreach (MMAutoExecutionItem item in Events)
            {
                if ((item.AutoExecuteOnStart) && (item.Event != null))
                {
                    item.Event.Invoke();
                }
            }
        }
        
        /// <summary>
        /// On Enable we invoke our events if needed
        /// </summary>
        protected virtual void OnEnable()
        {
            foreach (MMAutoExecutionItem item in Events)
            {
                if ((item.AutoExecuteOnEnable) && (item.Event != null))
                {
                    item.Event.Invoke();
                }
            }
        }
        
        /// <summary>
        /// On Enable we invoke our events if needed
        /// </summary>
        protected virtual void OnDisable()
        {
            foreach (MMAutoExecutionItem item in Events)
            {
                if ((item.AutoExecuteOnDisable) && (item.Event != null))
                {
                    item.Event.Invoke();
                }
            }
        }
        
        /// <summary>
        /// On Instantiate we invoke our events if needed
        /// </summary>
        protected virtual void OnInstantiate()
        {
            foreach (MMAutoExecutionItem item in Events)
            {
                if ((item.AutoExecuteOnInstantiate) && (item.Event != null))
                {
                    item.Event.Invoke();
                }
            }
        }
    }    
}