// src/Webshop.Application/Services/Admin/AdminUserService.cs
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Webshop.Application.DTOs.Users; // UserDto
using System.Collections.Generic; // Sicherstellen, dass für IEnumerable vorhanden

namespace Webshop.Application.Services.Admin
{
    public class AdminUserService
    {
        private readonly UserManager<IdentityUser> _userManager;

        public AdminUserService(UserManager<IdentityUser> userManager)
        {
            _userManager = userManager;
        }

        public async Task<IEnumerable<UserDto>> GetAllUsersAsync()
        {
            var users = await _userManager.Users.ToListAsync();

            var userDtos = new List<UserDto>();
            foreach (var user in users)
            {
                var roles = await _userManager.GetRolesAsync(user);
                userDtos.Add(new UserDto
                {
                    Id = user.Id,
                    Email = user.Email ?? string.Empty,
                    UserName = user.UserName ?? string.Empty,
                    Roles = roles.ToList(),
                    // LockoutEnd kann als Näherung für CreatedDate verwendet werden,
                    // da IdentityUser keine direkte CreatedDate-Eigenschaft hat.
                    // Ideal wäre es, ein CustomUser-Modell zu verwenden, das von IdentityUser erbt.
                    CreatedDate = user.LockoutEnd ?? DateTimeOffset.MinValue,
                    EmailConfirmed = user.EmailConfirmed
                });
            }
            return userDtos;
        }

        public async Task<UserDto?> GetUserByIdAsync(string userId)
        {
            var user = await _userManager.FindByIdAsync(userId);
            if (user == null) return null;

            var roles = await _userManager.GetRolesAsync(user);
            return new UserDto
            {
                Id = user.Id,
                Email = user.Email ?? string.Empty,
                UserName = user.UserName ?? string.Empty,
                Roles = roles.ToList(),
                CreatedDate = user.LockoutEnd ?? DateTimeOffset.MinValue,
                EmailConfirmed = user.EmailConfirmed
            };
        }

        // TODO: Methoden zum Aktualisieren von Rollen, Löschen von Benutzern etc.
    }
}