using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

using AriaConcept.Interfaces;
using AriaConcept.Services;

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

using static AriaConcept.Controllers.OSSController;

namespace AriaConcept.Controllers
{
  [ApiController]
  [Route("api/[controller]")]
  public class DerivativeController : ControllerBase
  {
    public record BucketObject(string name, string urn);

    private readonly IForgeDerivativeService _forgeDerivativeService;
    private readonly IForgeOSSService _forgeOSSService;

    public DerivativeController(IForgeDerivativeService forgeDerivativeService, IForgeOSSService forgeOSSService)
    {
      _forgeDerivativeService = forgeDerivativeService;
      _forgeOSSService = forgeOSSService;
    }

    [HttpGet()]
    public async Task<IEnumerable<BucketObject>> GetModels()
    {
      var objects = await _forgeOSSService.GetObjects();
      return from o in objects
             select new BucketObject(o.ObjectKey, Base64Encode(o.ObjectId));
    }

    [HttpGet("{urn}/status")]
    public async Task<TranslationStatus> GetModelStatus(string urn)
    {
      try
      {
        var status = await _forgeDerivativeService.GetTranslationStatus(urn);
        return status;
      }
      catch (Autodesk.Forge.Client.ApiException ex)
      {
        if (ex.ErrorCode == 404)
          return new TranslationStatus("n/a", "", new List<string>());
        else
          throw ex;
      }
    }

    public class UploadModelForm
    {
      [FromForm(Name = "model-zip-entrypoint")]
      public string? Entrypoint { get; set; }

      [FromForm(Name = "model-urn")]
      public string? ObjectUrn { get; set; }

      [FromForm(Name = "model-id")]
      public string? ObjectId { get; set; }
    }

    [HttpPost()]
    public async Task<BucketObject> TranslateModel([FromForm] UploadModelForm form)
    {
      var job = await _forgeDerivativeService.TranslateModel(form.ObjectUrn, form.Entrypoint);
      return new BucketObject(form.ObjectId, form.ObjectUrn);
    }
  }
}