using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Threading.Tasks;
using ExercisesViewModels;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace ExercisesWebsite.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class StudentController : ControllerBase
    {
        private readonly ILogger _logger;

        public StudentController(ILogger<StudentController> logger)
        {
            _logger = logger;
        }
        [HttpGet("{lastname}")]
        public IActionResult GetByLastname(string lastname)
        {
            try
            {
                StudentViewModel model = new StudentViewModel();
                model.Lastname = lastname;
                model.GetByLastName();
                return Ok(model);
            }
            catch(Exception ex)
            {
                _logger.LogError("Problem in  " + GetType().Name + " " + MethodBase.GetCurrentMethod().Name + " " + ex.Message);
                return StatusCode(StatusCodes.Status500InternalServerError);
            }
        }

        [HttpPut]
        public IActionResult Put([FromBody] StudentViewModel viewmodel)
        {
            try
            {
                int retVal = viewmodel.Update();
                switch (retVal)
                {
                    case 1:
                        return Ok(new { msg = "Student " + viewmodel.Lastname + " updated!" });
                    case -1:
                        return Ok(new { msg = "Student " + viewmodel.Lastname + " not updated!" });
                    case -2:
                        return Ok(new { msg = "Data is stale for " + viewmodel.Lastname + " Student not updated!" });
                    default:
                        return Ok(new { msg = "Student " + viewmodel.Lastname + " not updated!" });
                }
            }
            catch(Exception ex)
            {
                _logger.LogError("Problem in " + GetType().Name + " " + MethodBase.GetCurrentMethod().Name + " " + ex.Message);
                return StatusCode(StatusCodes.Status500InternalServerError);
            }
        }

        [HttpGet]
        public IActionResult GetAll()
        {
            try
            {
                StudentViewModel viewmodal = new StudentViewModel();
                List<StudentViewModel> allstudents = viewmodal.GetAll();
                return Ok(allstudents);
            }
            catch(Exception ex)
            {
                _logger.LogError("Problem in " + GetType().Name + " " + MethodBase.GetCurrentMethod().Name + " " + ex.Message);
                return StatusCode(StatusCodes.Status500InternalServerError);
            }
        }

        [HttpPost]
        public IActionResult Post(StudentViewModel vm)
        {
            try
            {
                vm.Add();
                return vm.Id > 1
                ? Ok(new { msg = "Student " + vm.Lastname + " added!" })
                : Ok(new { msg = "Student " + vm.Lastname + " not added!" });
            }
            catch(Exception ex)
            {
                _logger.LogError("Problem in " + GetType().Name + " " + MethodBase.GetCurrentMethod().Name + " " + ex.Message);
                return StatusCode(StatusCodes.Status500InternalServerError);
            }
        }
    }
}