using System.Security.Claims;
using Microsoft.AspNetCore.Http;
using MyNewProjectName.Application.Interfaces;

namespace MyNewProjectName.Infrastructure.Services;

/// <summary>
/// Implementation of ICurrentUserService
/// Automatically extracts user information from HttpContext using IHttpContextAccessor
/// This follows Clean Architecture principles - no dependency on concrete middleware
/// </summary>
public class CurrentUserService : ICurrentUserService
{
    private readonly IHttpContextAccessor _httpContextAccessor;

    public CurrentUserService(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
    }

    public string? UserId
    {
        get
        {
            var user = _httpContextAccessor.HttpContext?.User;
            if (user?.Identity?.IsAuthenticated != true)
                return null;

            return user.FindFirstValue(ClaimTypes.NameIdentifier)
                ?? user.FindFirstValue("sub")
                ?? user.FindFirstValue("userId");
        }
    }

    public string? UserName
    {
        get
        {
            var user = _httpContextAccessor.HttpContext?.User;
            if (user?.Identity?.IsAuthenticated != true)
                return null;

            return user.FindFirstValue(ClaimTypes.Name)
                ?? user.FindFirstValue("name")
                ?? user.FindFirstValue("username");
        }
    }

    public bool? IsAuthenticated
    {
        get
        {
            return _httpContextAccessor.HttpContext?.User?.Identity?.IsAuthenticated;
        }
    }

    public string? Role
    {
        get
        {
            var user = _httpContextAccessor.HttpContext?.User;
            if (user?.Identity?.IsAuthenticated != true)
                return null;

            return user.FindFirstValue(ClaimTypes.Role)
                ?? user.FindFirstValue("role");
        }
    }
}