using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AutoMapper;
using Microsoft.AspNetCore.Mvc;
using Venues.Entities;
using Venues.Filter;
using Venues.Models;
using Venues.Services;
using Venues.Wrappers;

namespace Venues.Controllers
{
    [ApiController]
    [Route("api/venues")]
    public class VenuesController : ControllerBase
    {
        private readonly IVenuesRepository _venuesRepository;
        private readonly IMapper _mapper;
        const int maxVenuesPerPage = 50;

        public VenuesController(IVenuesRepository venuesRepository, IMapper mapper)
        {
            _venuesRepository = venuesRepository ?? throw new ArgumentNullException(nameof(venuesRepository));
            _mapper = mapper ?? throw new ArgumentNullException(nameof(mapper));
        }

        [HttpGet]
        public async Task<ActionResult<IEnumerable<VenueDto>>> GetVenues([FromQuery] PaginationFilter filter)
        {
            if (filter.PageSize > maxVenuesPerPage)
            {
                filter.PageSize = maxVenuesPerPage;
            }

            var (venueEntities, paginationMetadata) = await _venuesRepository.GetVenuesAsync(filter.PageNumber, filter.PageSize);

            return Ok(new PagedResponse<IEnumerable<VenueDto>>(_mapper.Map<IEnumerable<VenueDto>>(venueEntities), paginationMetadata));
        }

        [HttpGet("{id}")]
        public async Task<ActionResult<VenueDto>> GetVenue(int id)
        {
            var venue = await _venuesRepository.GetVenueAsync(id);

            if (venue == null)
            {
                return NotFound();
            }

            return Ok(new Response<VenueDto>(_mapper.Map<VenueDto>(venue)));
        }
    }
}