using AsbCloudApp.Data.SAUB;
using AsbCloudApp.Services;
using AsbCloudDb.Model;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Caching.Memory;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Threading;
using System.Linq;
using AsbCloudApp.Exceptions;

namespace AsbCloudInfrastructure.Repository;


public class SetpointsRequestRepository : CrudWellRelatedCacheRepositoryBase<SetpointsRequestDto, SetpointsRequest>
{
    private readonly IWellService wellService;

    public SetpointsRequestRepository(IAsbCloudDbContext dbContext, IMemoryCache memoryCache, IWellService wellService) 
        : base(dbContext, memoryCache, q => q.Include(s => s.Author)
                                .Include(s => s.Well))
    {
        this.wellService = wellService;
    }

    //TODO: заметка для рефакторинга. Использовать метод из базового репозитория
    public virtual async Task<int> UpdateRangeAsync(IEnumerable<SetpointsRequestDto> dtos, CancellationToken token)
    {
        if (!dtos.Any())
            return 0;
        
        var ids = dtos
            .Select(o => o.Id)
            .Distinct()
            .ToArray();
        
        if (ids.Any(id => id == default))
            throw new ArgumentInvalidException(nameof(dtos), "Все записи должны иметь Id");
        
        if (ids.Length != dtos.Count())
            throw new ArgumentInvalidException(nameof(dtos), "Все записи должны иметь уникальные Id");
        
        var existingEntitiesCount = await dbContext.Set<SetpointsRequest>()
            .Where(o => ids.Contains(o.Id))
            .CountAsync(token);
        
        if (ids.Length != existingEntitiesCount)
            throw new ArgumentInvalidException(nameof(dtos), "Все записи должны существовать в БД");

        var entities = dtos.Select(Convert);
        var entries = entities.Select(entity => dbContext.Set<SetpointsRequest>().Update(entity)).ToList();

        var affected = await dbContext.SaveChangesAsync(token);
        
        entries.ForEach(entry => entry.State = EntityState.Detached);

        if(affected > 0) 
            DropCache();
        
        return affected;
    }

    protected override SetpointsRequestDto Convert(SetpointsRequest src)
    {
        var result = base.Convert(src);
        var timezoneOffsetHours = wellService.GetTimezone(src.IdWell).Hours;
        result.UploadDate = src.UploadDate.ToOffset(TimeSpan.FromHours(timezoneOffsetHours));
        return result;
    }

    protected override SetpointsRequest Convert(SetpointsRequestDto src)
    {
        var result = base.Convert(src);
        result.UploadDate = src.UploadDate.ToUniversalTime();
        return result;
    }
}