using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Autodesk.Forge;
using AriaConcept.Interfaces;

namespace AriaConcept.Controllers
{
  [ApiController]
  public class AuthController : ControllerBase
  {
    // As both internal & public tokens are used for all visitors
    // we don't need to request a new token on every request, so let's
    // cache them using static variables. Note we still need to refresh
    // them after the expires_in time (in seconds)
    public record AccessToken(string access_token, long expires_in);

    private readonly IForgeAuthService _forgeAuthService;

    public AuthController(IForgeAuthService forgeAuthService)
    {
      _forgeAuthService = forgeAuthService;
    }
    [HttpGet]
    [Route("api/auth/token")]
    public async Task<AccessToken> GetAccessToken()
    {
      var token = await _forgeAuthService.GetPublicToken();
      return new AccessToken(token.AccessToken, (long)Math.Round((token.ExpiresAt - DateTime.UtcNow).TotalSeconds));
    }
  }
}