using System;
using Microsoft.EntityFrameworkCore;
using Venues.DbContexts;
using Venues.Entities;

namespace Venues.Services
{
    public class VenuesRepository : IVenuesRepository
    {
        private readonly MlbGameDayContext _context;

        public VenuesRepository(MlbGameDayContext context)
        {
            _context = context ?? throw new ArgumentNullException(nameof(context));
        }

        public async Task<Venue?> GetVenueAsync(int venueId)
        {
            return await _context.Venues.Where(v => v.Id == venueId).FirstOrDefaultAsync();
        }

        public async Task<(IEnumerable<Venue>, PaginationMetadata)> GetVenuesAsync(int pageNumber, int pageSize)
        {
            var collection = _context.Venues as IQueryable<Venue>;
            var totalItemCount = await collection.CountAsync();
            var paginationMetadata = new PaginationMetadata(totalItemCount, pageSize, pageNumber);
            var collectionToReturn = await collection.OrderBy(v => v.Name)
                .Skip(pageSize * (pageNumber -1))
                .Take(pageSize)
                .ToListAsync();

            return (collectionToReturn, paginationMetadata);
        }
    }
}