using Mogafa.App.Behaviours;
using Mogafa.Common;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DidabuCloud.Unity.Core
{
    
    public partial class Didabu : MogafaBase
    {
        private readonly string BehavioursLocalStoragePrefixKey = "DidabuBehavioursLocalStorageKey";
        private UserBehaviour userBehaviour = null;
        public event UserBehaviourChangedHandler BehaviourChanged;
        internal async Task<UserBehaviour> GetUserBehaviour()
        {
            if(userBehaviour != null)
            {
                return userBehaviour;
            }
            userBehaviour = await LocalStorage.Get<UserBehaviour>(BehavioursLocalStoragePrefixKey);
            if(userBehaviour == null)
            {
                userBehaviour = new UserBehaviour();
                userBehaviour.BehaviourChanged += BehaviourChangedInternal;
                await LocalStorage.Set(BehavioursLocalStoragePrefixKey, userBehaviour);
            }
            return userBehaviour;
        }

        private void BehaviourChangedInternal(string code, long newValue, long oldValue)
        {
            BehaviourChanged?.Invoke(code, newValue, oldValue);
        }

        private async Task SetUserBehaviour()
        {
            if(userBehaviour == null)
            {
                return;
            }
            await LocalStorage.Set(BehavioursLocalStoragePrefixKey, userBehaviour);
        }
        public async Task<long> AddBehaviour(string code, long value = 1)
        {
            var behaviour = await GetUserBehaviour();
            var newValue = behaviour.Add(code, value);
            await SetUserBehaviour();
            return newValue;
        }
        public async Task<long> GetBehaviour(string code)
        {
            var behaviour = await GetUserBehaviour();
            if(behaviour == null)
            {
                return 0L;
            }
            return behaviour.GetBehaviour(code);
        }
    }
}