using AuthorBuddy.Web.Data;
using LiteDB;

namespace AuthorBuddy.Web.Services
{
    public class LocalStorageSyncService : ILocalStorageSyncService
    {
        private readonly ILiteCollection<UserLocalStorageSync> _collection;
        private ISettingsService Settings { get; }

        public LocalStorageSyncService(ILiteDatabase database, ISettingsService settings)
        {
            _collection = database.GetCollection<UserLocalStorageSync>("UserStorageBackup");
            Settings = settings;
        }

        public async Task SaveStateAsync(Dictionary<string, string> data)
        {
            var user = await Settings.GetCurrentUserAsync();
            if (user == null)
                return;
            var result = _collection.FindOne(x => x.UserId == user.Id);
            var insert = false;
            if (result == null)
            {
                result = new UserLocalStorageSync();
                result.UserId = user.Id;
                insert = true;
            }
            result.LastSyncedAt = DateTime.Now;
            result.StorageData = data;

            if (insert)
                _collection.Insert(result);
            else
                _collection.Update(result);

        }

        public async Task<Dictionary<string, string>?> GetStateAsync()
        {
            var user = await Settings.GetCurrentUserAsync();
            if (user == null)
                return new();
            var result = _collection.FindOne(x => x.UserId == user.Id);
            return result?.StorageData;
        }
    }
}