using Blazored.LocalStorage;
using HeartTrack.Models.Authentification;
using Microsoft.AspNetCore.Components.Authorization;
using System.Security.Claims;

namespace HeartTrack.Services.AuthentificationService
{
    public class CustomStateProvider : AuthenticationStateProvider
    {
        private readonly IAuthService _authService;
        private readonly ILocalStorageService _localStorage;
        public CurrentUser? currentUser { get; set; }

        public CustomStateProvider(IAuthService authService, ILocalStorageService localStorage)
        {
            _authService = authService;
            _localStorage = localStorage;
        }

        public override async Task<AuthenticationState> GetAuthenticationStateAsync()
        {
            await RehydrateUserStateAsync();
            var identity = new ClaimsIdentity();
            if (currentUser?.IsAuthenticated == true)
            {
                var claims = new[] { new Claim(ClaimTypes.Name, currentUser.UserName) }
                    .Concat(currentUser.Claims.Select(c => new Claim(c.Key, c.Value)));
                identity = new ClaimsIdentity(claims, "Server authentication");
            }

            return new AuthenticationState(new ClaimsPrincipal(identity));
        }

        public async Task Login(LoginRequest loginParameters)
        {
            _authService.Login(loginParameters);
            var user = await _authService.GetUser(loginParameters.UserName, loginParameters.Password);
            currentUser = user;

            await _localStorage.SetItemAsync("currentUser", currentUser);

            NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
        }

        public async Task Logout()
        {
            await _localStorage.RemoveItemAsync("currentUser");
            currentUser = null;
            NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
        }

        private async Task RehydrateUserStateAsync()
        {
            currentUser = await _localStorage.GetItemAsync<CurrentUser>("currentUser");
            if (currentUser != null && currentUser.IsAuthenticated)
            {
                // Utilisateur authentifié
            }
            else
            {
                currentUser = new CurrentUser();
            }
        }
    }
}