using System;
using UnityEngine;

namespace BITKit.GameEditor
{
    /// <summary>
    /// Serializable wrapper for System.Guid.
    /// Can be implicitly converted to/from System.Guid.
    ///
    /// Author: Searous
    /// </summary>
    [Serializable]
    public struct SerializableGuid : ISerializationCallbackReceiver {
        private Guid guid;
        [SerializeField] private string serializedGuid;
 
        public SerializableGuid(Guid guid) {
            this.guid = guid;
            serializedGuid = null;
        }
 
        public override bool Equals(object obj) {
            return obj is SerializableGuid guid &&
                   this.guid.Equals(guid.guid);
        }
 
        public override int GetHashCode() {
            return -1324198676 + guid.GetHashCode();
        }
 
        public void OnAfterDeserialize() {
            try {
                guid = Guid.Parse(serializedGuid);
            } catch {
                guid = Guid.Empty;
                Debug.LogWarning($"Attempted to parse invalid GUID string '{serializedGuid}'. GUID will set to System.Guid.Empty");
            }
        }
 
        public void OnBeforeSerialize() {
            serializedGuid = guid.ToString();
        }
 
        public override string ToString() => guid.ToString();
 
        public static bool operator ==(SerializableGuid a, SerializableGuid b) => a.guid == b.guid;
        public static bool operator !=(SerializableGuid a, SerializableGuid b) => a.guid != b.guid;
        public static implicit operator SerializableGuid(Guid guid) => new SerializableGuid(guid);
        public static implicit operator Guid(SerializableGuid serializable) => serializable.guid;
        public static implicit operator SerializableGuid(string serializedGuid) => new SerializableGuid(Guid.Parse(serializedGuid));
        public static implicit operator string(SerializableGuid serializedGuid) => serializedGuid.ToString();
    }
}