using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AutoMapper;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using ThuisApi.Data;
using ThuisApi.Models;

namespace ThuisApi.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class FreezerController : ControllerBase
    {
        private readonly ThuisDbContext _context;
        private readonly IMapper _mapper;

        public FreezerController(ThuisDbContext context, IMapper mapper)
        {
            _context = context;
            _mapper = mapper;
        }

        // GET: api/Freezer
        [HttpGet]
        public async Task<ActionResult<IEnumerable<FreezerDto>>> GetFreezer()
        {
            // Iterate over the freezers to add amount in freezer.
            var freezers = await _context.Freezer.ToListAsync();
            var freezerResponse = new List<FreezerDto>();
            foreach (var freezer in freezers)
            {
                freezerResponse.Add(new FreezerDto
                {
                    FreezerId = freezer.FreezerId,
                    Name = freezer.Name,
                    AmountInFreezer =
                        await _context.FreezerItem.CountAsync(a => a.Freezer.FreezerId == freezer.FreezerId)
                });
            }

            return Ok(freezerResponse.ToArray());
        }

        // GET: api/Freezer/5
        [HttpGet("{id}")]
        public async Task<ActionResult<FreezerDto>> GetFreezer(int id)
        {
            var freezer = await _context.Freezer.FindAsync(id);

            if (freezer == null)
            {
                return NotFound();
            }
            
            return Ok(_mapper.Map<Freezer, FreezerDto>(freezer));
        }

        // PUT: api/Freezer/5
        // To protect from overposting attacks, see https://go.microsoft.com/fwlink/?linkid=2123754
        [HttpPut("{id}")]
        public async Task<IActionResult> PutFreezer(int id, FreezerDto freezer)
        {
            if (id != freezer.FreezerId)
            {
                return BadRequest();
            }

            _context.Entry(_mapper.Map<FreezerDto, Freezer>(freezer)).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!FreezerExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }

            return NoContent();
        }

        // POST: api/Freezer
        // To protect from overposting attacks, see https://go.microsoft.com/fwlink/?linkid=2123754
        [HttpPost]
        public async Task<ActionResult<FreezerDto>> PostFreezer(FreezerDto freezerDto)
        {
            var mappedFreezer = _mapper.Map<FreezerDto, Freezer>(freezerDto);
            var newFreezer = new Freezer { Name = mappedFreezer.Name };
            _context.Freezer.Add(newFreezer);
            await _context.SaveChangesAsync();

            return CreatedAtAction("GetFreezer", new { id = newFreezer.FreezerId },
                _mapper.Map<Freezer, FreezerDto>(newFreezer));
        }

        // DELETE: api/Freezer/5
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeleteFreezer(int id)
        {
            var freezer = await _context.Freezer.FindAsync(id);
            if (freezer == null)
            {
                return NotFound();
            }

            _context.Freezer.Remove(freezer);
            await _context.SaveChangesAsync();

            return NoContent();
        }

        private bool FreezerExists(int id)
        {
            return _context.Freezer.Any(e => e.FreezerId == id);
        }
    }
}