using Blazored.LocalStorage;
using decePubClient.Helpers;
using decePubClient.Models;
using Microsoft.AspNetCore.Components.Authorization;
using System.Security.Claims;
using System.Text.Json;

namespace decePubClient.Services
{
	public class TokenAuthStateProvider(ILocalStorageService storage, IStorage dbStorage, ILogger<TokenAuthStateProvider> logger)
		: AuthenticationStateProvider
	{
		public void SetToken(/*string token, long expirationTicks = default*/)
		{
			//AuthData = await Storage.GetItemAsync<AuthData>(nameof(AuthData));
			//if (string.IsNullOrEmpty(token))
			//{
			//	Logger.LogInformation($"set null({nameof(SetToken)})");
			//	AuthData.Token = null;
			//	AuthData.TokenExpiration = null;
			//}
			//else
			//{
			//	AuthData.Token = token;
			//	AuthData.TokenExpiration = expirationTicks;
			//}
			//await Storage.SetItemAsync(nameof(AuthData), AuthData);

			NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
		}

		/// <summary>The stored token while it is still valid, otherwise null.</summary>
		public async Task<string> GetToken(CancellationToken cancellationToken = default)
		{
			var authData = await storage.GetItemAsync<AuthData>(nameof(AuthData), cancellationToken);
			if (string.IsNullOrEmpty(authData?.Token) || authData.TokenExpiration is not { } expiration || expiration <= DateTime.UtcNow.Ticks)
				return null;
			return authData.Token;
		}

		public async Task<bool> IsAuthenticatedAsync(CancellationToken cancellationToken = default) =>
			await GetToken(cancellationToken) is not null;

		public async Task LogoutAsync(bool deleteDb = false, CancellationToken cancellationToken = default)
		{
			logger.LogInformation($"set null({nameof(LogoutAsync)})");
			//await Storage.RemoveItemAsync(nameof(PrivateCacheData));
			await storage.RemoveItemAsync(nameof(AuthData), cancellationToken);
			if (deleteDb)
				await dbStorage.RemoveAll(includeClientLogs: true, cancellationToken: cancellationToken);

			NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
		}

		public override async Task<AuthenticationState> GetAuthenticationStateAsync()
		{
			var authData = await storage.GetItemAsync<AuthData>(nameof(AuthData));
			if (string.IsNullOrEmpty(authData?.Token))
			{
				logger.LogInformation($"set null({nameof(GetAuthenticationStateAsync)})");
				return new(new());
			}
			var claims = new List<Claim>
			{
				new(ClaimTypes.UserData, JsonSerializer.Serialize(authData.User, SUtility.DefaultSerializer))
			};

			//claims.Add(new(Policies.IsUser, (AuthData.User.Policies.Contains(Policies.IsUser)).ToString().ToLower()));
			//claims.Add(new(Policies.UserPlus, (AuthData.User.Policies.Contains(Policies.UserPlus)).ToString().ToLower()));
			//claims.Add(new(Policies.IsAdmin, (AuthData.User.Policies.Contains(Policies.IsAdmin)).ToString().ToLower()));

			var identity = new ClaimsIdentity(claims, "jwt");
			return new(new(identity));
		}
	}
}