using System.Threading;
using System.Threading.Tasks;
using InternshipSystem.Api.Queries;
using InternshipSystem.Api.Security;
using InternshipSystem.Api.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace InternshipSystem.Api.Controllers
{
    [ApiController]
    [Route("document")]
    public class DocumentsController : ControllerBase
    {
        private readonly IInternshipService _internshipService;

        public DocumentsController(IInternshipService internshipService)
        {
            _internshipService = internshipService;
        }

        /// <summary>
        /// Fill out required document, 
        /// </summary>
        /// <param name="documentRequest">Documents Scan and description, and Id of filled document</param>
        /// <returns></returns>
        /// <response code="200">If change was successfully registered</response>
        /// <response code="400">If the provided query was malformed</response>
        /// <response code="404">Id doesn't match any required document</response>
        /// <response code="401">This action is only available for authorized student registered for current edition</response>
        [HttpPost]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [ProducesResponseType(StatusCodes.Status404NotFound)]
        [ProducesResponseType(StatusCodes.Status401Unauthorized)]
        [Authorize(Policy = Policies.RegisteredOnly)]
        public async Task<ActionResult> AddDocumentToInternship([FromBody] DocumentPublishRequest documentRequest, CancellationToken cancellationToken)
        {
            var validator = new DocumentPublishRequest.Validator();
            var validationResult = await validator.ValidateAsync(documentRequest, cancellationToken);
            
            if (!validationResult.IsValid)
            {
                return BadRequest(validationResult.ToString());
            }

            var personNumber = long.Parse(User.FindFirst(InternshipClaims.PersonNumber).Value);

            return await _internshipService.AddDocumentToInternship(documentRequest, personNumber, cancellationToken);
        }
    }
}