using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using LCU.Shared.Collections.RepoApiLib.Exceptions;
using LCU.Shared.Collections.RepoApiLib.Models;
using LCU.Shared.Collections.RepoApiLib.Persistence;
using Microsoft.EntityFrameworkCore;

namespace LCU.Shared.Collections.RepoApiLib.Repositories
{
    public class RepoManualStatusRepository : BaseRepository, IRepoManualStatusRepository
    {
        public RepoManualStatusRepository(AppDbContext context) : base(context)
        {
        }

        public async Task<IReadOnlyCollection<RepoManualStatus>> ListAllAsync()
        {
            return await _context.RepoManualStatuses.ToListAsync();
        }

        public async Task<IReadOnlyCollection<string>> ListWatchStatusesAsync()
        {
            var statusSet = await (from status in _context.RepoManualStatuses
                where status.WatchForStatusChanges == true
                select status).ToListAsync();

            return statusSet.Select(x => x.Description).ToList() as IReadOnlyCollection<string>;
        }

        public async Task AddAsync(RepoManualStatus repoManualStatus)
        {
            // Only Create the Alert if an identical one doesn't already exist
            var duplicateStatus = (
                from status in _context.RepoManualStatuses
                where status.Description.ToUpper().Trim() == repoManualStatus.Description.ToUpper().Trim()
                select status
            );

            if (!duplicateStatus.Any())
            {
                await _context.RepoManualStatuses.AddAsync(repoManualStatus);
            }
            else
            {
                throw new DuplicateResourceException("RepoManualStatus");
            }
        }

        public async Task<RepoManualStatus> FindByIdAsync(int id)
        {
            return await _context.RepoManualStatuses.FindAsync(id);
        }

        public void Update(RepoManualStatus repoManualStatus)
        {
            _context.RepoManualStatuses.Update(repoManualStatus);
        }

        public void Remove(RepoManualStatus repoManualStatus)
        {
            _context.RepoManualStatuses.Remove(repoManualStatus);
        }
    }
}