using MediatR;
using Microsoft.EntityFrameworkCore;
using SequenceAuth.Example.Domain;
using SequenceAuth.Example.Infrastructure;

namespace SequenceAuth.Example.Features.Todos;

public record GetTodosQuery(Guid UserId, TodoStatus? StatusFilter) : IRequest<List<TodoItem>>;

public class GetTodosQueryHandler(AppDbContext dbContext) : IRequestHandler<GetTodosQuery, List<TodoItem>>
{
    public async Task<List<TodoItem>> Handle(GetTodosQuery request, CancellationToken cancellationToken)
    {
        var query = dbContext.Todos.Where(t => t.UserId == request.UserId);
        
        query = request.StatusFilter switch
        {
            null => query,
            var status => query.Where(t => t.Status == status)
        };

        return await query.ToListAsync(cancellationToken);
    }
}