using System.Collections.Concurrent;
using Microsoft.Extensions.DependencyInjection;
using Seyounth.Hyosung.Data.Entities;
using Seyounth.Hyosung.Data.Models;
using Seyounth.Hyosung.Data.Repositories;

namespace Seyounth.Hyosung.Data.Services;

public class VarietyService : IVarietyService
{
    private readonly IRepository<VarietyEntity> _varietyRepository;
    private readonly IRepository<PalletEntity> _palletRepository;
    private readonly ConcurrentBag<VarietyEntity> _varietiesCache;
    private readonly ConcurrentBag<PalletEntity> _palletsCache;

    public VarietyService(IServiceProvider provider)
    {
        try
        {
            _varietyRepository = provider.CreateScope().ServiceProvider.GetRequiredService<IRepository<VarietyEntity>>();
            _palletRepository = provider.CreateScope().ServiceProvider.GetRequiredService<IRepository<PalletEntity>>();
            _varietiesCache = new ConcurrentBag<VarietyEntity>(_varietyRepository.GetList());
            _palletsCache = new ConcurrentBag<PalletEntity>(_palletRepository.GetList());
        }catch(Exception e)
        {
            Console.WriteLine(e.Message);
        }
        
    }

    public async Task<Variety?> GetVarietyByCodeAsync(string code, int? layers = null)
    {
        var entity = layers != null
            ? _varietiesCache.FirstOrDefault(p => p.Code == code && p.StackingLayers == layers)
            : _varietiesCache.FirstOrDefault(v => v.Code == code);
        return entity is null ? null : Variety.Create(entity, _palletsCache.ToList());
    }

    public Task<Variety> GetById(int id)
    {
        var entity = _varietiesCache.FirstOrDefault(p => p.Id == id);
        return Task.FromResult(Variety.Create(entity, _palletsCache.ToList()));
    }

    public async Task AddVarietyAsync(Variety variety)
    {
        var entity = await _varietyRepository.InsertReturnEntityAsync(variety.ToEntity());
        _varietiesCache.Add(entity);
    }

    public async Task<List<Pallet>> GetPalletsAsync()
    {
        return _palletsCache.Select(p =>Pallet.FromEntity(p)).ToList();
    }

    public async Task AddPalletAsync(Pallet pallet)
    {
        var entity = await _palletRepository.InsertReturnEntityAsync(pallet);
        _palletsCache.Add(entity);
    }

    public List<Variety> GetAll()
    {
        return _varietiesCache.Select(v=>Variety.Create(v, _palletsCache.ToList())).ToList();
    }
}