using System;
using System.Collections.Generic;
using ClusterVR.CreatorKit.Item;
using UnityEditor;
using UnityEngine;

namespace ClusterVR.CreatorKit.Gimmick.Implements
{
    [RequireComponent(typeof(Item.Implements.Item))]
    public sealed class CreateItemGimmick : MonoBehaviour, IItemGimmick, ICreateItemGimmick, IItemTemplateContainer
    {
        [SerializeField, HideInInspector] Item.Implements.Item item;
        [SerializeField, ItemGimmickKey] GimmickKey key = new GimmickKey(GimmickTarget.Item);
        [SerializeField] Item.Implements.Item itemTemplate;
        [SerializeField, HideInInspector] ItemTemplateId itemTemplateId;
        [SerializeField] Transform spawnPoint;

        ItemId IGimmick.ItemId => (item != null ? item : item = GetComponent<Item.Implements.Item>()).Id;
        GimmickTarget IGimmick.Target => key.Target;
        string IGimmick.Key => key.Key;
        ParameterType IGimmick.ParameterType => ParameterType.Signal;
        public Transform SpawnPoint => spawnPoint;

        public IItem ItemTemplate => itemTemplate;

        public ItemTemplateId ItemTemplateId
        {
            get => itemTemplateId;
#if UNITY_EDITOR
            set => itemTemplateId = value;
#endif
        }


        public event CreateItemEventHandler OnCreateItem;

        DateTime lastTriggeredAt;

        void Start()
        {
            if (item == null)
            {
                item = GetComponent<Item.Implements.Item>();
            }
        }

        public void Run(GimmickValue value, DateTime current)
        {
            if (!this.IsValid())
            {
                return;
            }
            if (value.TimeStamp <= lastTriggeredAt)
            {
                return;
            }
            lastTriggeredAt = value.TimeStamp;
            if ((current - value.TimeStamp).TotalSeconds > Constants.TriggerGimmick.TriggerExpireSeconds)
            {
                return;
            }

            var useSpawnPoint = spawnPoint != null ? spawnPoint : transform;
            var args = new CreateItemEventArgs
            {
                SenderId = item.Id,
                TemplateId = itemTemplateId,
                Position = useSpawnPoint.position,
                Rotation = useSpawnPoint.rotation
            };
            OnCreateItem?.Invoke(args);
        }

        void Reset()
        {
            item = GetComponent<Item.Implements.Item>();
        }

        void OnValidate()
        {
            if (item == null || item.gameObject != gameObject)
            {
                item = GetComponent<Item.Implements.Item>();
            }
            if (spawnPoint == null)
            {
                spawnPoint = transform;
            }
        }

        public IEnumerable<ItemTemplateIdAndItem> ItemTemplates() =>
            this.IsValid()
                ? new ItemTemplateIdAndItem[] { new(itemTemplateId, itemTemplate) }
                : new ItemTemplateIdAndItem[]{};

#if UNITY_EDITOR
        public void SetItemTemplateId(IItem item, ItemTemplateId id)
        {
            if (itemTemplate.Equals(item))
            {
                itemTemplateId = id;
            }
        }

        public void MarkObjectDirty()
        {
            EditorUtility.SetDirty(this);
        }
#endif
    }
}