using System;

using System.Collections.Generic;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using Microsoft.AspNetCore.Mvc;

​

[Route("calculate")]

public class CalculationController : Controller

{

    private readonly ICalculationService calculationService;

​

    public CalculationController(ICalculationService calculationService)

    {

        this.calculationService = calculationService;

    }

​

    /*

        Example Request:

        POST /calculate/5/add

        Body:

        {

            "values": [1, 2, 3]

        }

​

        Example Response:

        11

    */

    [HttpPost]

    [Route("{baseValue}/add")]

    public async Task<ActionResult<int>> Add(int baseValue, [FromBody] InputObject input)

    {

        var result = await calculationService.AddValues(baseValue, input.Values);

​

        return Ok(result);

    }

}

​

public class MyCalculationService : ICalculationService

{

    // Returns the total sum of value and valuesToAdd

    public Task<int> AddValues(int value, IEnumerable<int> valuesToAdd)

    {

        foreach(var i in valuesToAdd)

        {

            value += i;

        }

​

        return Task.FromResult(value);

    }

}

​

public interface ICalculationService

{

    // Returns the total sum of value and valuesToAdd

    Task<int> AddValues(int value, IEnumerable<int> valuesToAdd);

}

​

public class InputObject

{

    public IEnumerable<int> Values { get; set;}

}

​

/* Questions:

​

    1) How should the controller get a reference to MyCalculationService and IValueRepository?

​

    2) What's missing from the 'Add' controller method to make it match the example request?

​

    3) How would you implement the AddValues method?

    4) How would you fix the error on line 24?

*/