using System.Security.Claims;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;


/// <summary>
/// JWT authentication and current user info.
/// </summary>
[ApiController]
[Route("api/v1/auth")]
[Produces("application/json")]
public class AuthController : ControllerBase
{
    private readonly IAuthService _auth;

    public AuthController(IAuthService auth) => _auth = auth;

    /// <summary>
    /// Authenticates a user and returns a JWT with role claims.
    /// </summary>
    [HttpPost("login")]
    [ProducesResponseType(typeof(ApiResponse<LoginResponse>), StatusCodes.Status200OK)]
    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status422UnprocessableEntity)]
    public async Task<IActionResult> Login([FromBody] LoginRequest req)
    {
        var result = await _auth.LoginAsync(req);
        return Ok(ApiResponse<LoginResponse>.Ok(result));
    }

    /// <summary>
    /// Returns the current authenticated user's profile.
    /// </summary>
    [HttpGet("me")]
    [Authorize]
    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status200OK)]
    [ProducesResponseType(typeof(ApiResponse<object>), StatusCodes.Status401Unauthorized)]
    public async Task<IActionResult> Me()
    {
        var userId = Guid.Parse(User.FindFirstValue(ClaimTypes.NameIdentifier)!);
        var user = await _auth.GetCurrentUserAsync(userId);
        return Ok(ApiResponse<object>.Ok(new
        {
            user.Id, user.Username, user.FullName,
            role = user.Role.ToDbString()
        }));
    }
}