using EnvelopeGenerator.Application.Common.Dto;
using EnvelopeGenerator.Application.Common.Query;
using MediatR;
using AutoMapper;
using DigitalData.Core.Abstraction.Application.Repository;
using EnvelopeGenerator.Domain.Entities;
using Microsoft.EntityFrameworkCore;

namespace EnvelopeGenerator.Application.Envelopes.Queries;

/// <summary>
/// 
/// </summary>
public record ReadUserEnvelopesQuery : EnvelopeQueryBase, IRequest<IEnumerable<EnvelopeDto>>
{
    /// <summary>
    /// 
    /// </summary>
    public required int UserId { get; init; }

    /// <summary>
    /// 
    /// </summary>
    public EnvelopeStatusQuery? Status { get; init; }
}

/// <summary>
/// 
/// </summary>
public class ReadUserEnvelopesQueryHandler : IRequestHandler<ReadUserEnvelopesQuery, IEnumerable<EnvelopeDto>>
{
    private readonly IRepository<Envelope> _repository;
    private readonly IMapper _mapper;

    /// <summary>
    /// 
    /// </summary>
    /// <param name="repository"></param>
    /// <param name="mapper"></param>
    public ReadUserEnvelopesQueryHandler(IRepository<Envelope> repository, IMapper mapper)
    {
        _repository = repository;
        _mapper = mapper;
    }

    /// <summary>
    /// 
    /// </summary>
    /// <param name="request"></param>
    /// <param name="cancellationToken"></param>
    /// <returns></returns>
    public async Task<IEnumerable<EnvelopeDto>> Handle(ReadUserEnvelopesQuery request, CancellationToken cancellationToken)
    {
        var query = _repository.Query
            .Include(e => e.Documents)
            .Where(e => e.UserId == request.UserId);

        if (request.Status is { } status)
        {
            if (status.Min is not null)
                query = query.Where(e => e.Status >= status.Min);
            if (status.Max is not null)
                query = query.Where(e => e.Status <= status.Max);
            if (status.Include?.Length > 0)
                query = query.Where(e => status.Include.Contains(e.Status));
            if (status.Ignore?.Length > 0)
                query = query.Where(e => !status.Ignore.Contains(e.Status));
        }

        if (request.Id is int id)
            query = query.Where(e => e.Id == id);

        if (request.Uuid is string uuid)
            query = query.Where(e => e.Uuid == uuid);

        var envelopes = await query.AsNoTracking().ToListAsync(cancellationToken);
        return _mapper.Map<IEnumerable<EnvelopeDto>>(envelopes);
    }
}