using AutoMapper;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using SytelineSaAppEfDataModel.Dtos;

namespace SytelineSaAppEfDataModel.Services
{
    public class CustomerOrderService(SytelineSaAppDbContext context, IMapper mapper) : ICustomerOrderService
    {
        public async Task<IEnumerable<CustomerOrderDto>> GetAll()
        {
            return await context.CustomerOrders.Select(x => mapper.Map<CustomerOrderDto>(x)).ToListAsync();
        }

        public async Task<CustomerOrderDto?> GetByOrderNumber(string orderNumber)
        {
            CustomerOrderDto? customerOrder = await context.CustomerOrders
                .Where(x => x.CoNum == orderNumber)
                .Select(x => mapper.Map<CustomerOrderDto>(x)).FirstOrDefaultAsync();
            if (customerOrder == null) return null;
            
            customerOrder.CustomerOrderLines = await context.CustomerOrderLines
                .Where(x => x.CoNum == orderNumber)
                .Select(x => mapper.Map<CustomerOrderLineDto>(x)).ToListAsync();

            foreach (CustomerOrderLineDto customerOrderLine in customerOrder.CustomerOrderLines)
            {
                customerOrderLine.CustomerOrderLineItems = await context.CustomerOrderLineItems
                    .Where(x => x.CoNum == orderNumber && x.CoLine == customerOrderLine.CoLine)
                    .Select(x => mapper.Map<CustomerOrderLineItemDto>(x)).ToListAsync();
            }

            return customerOrder;
        }
    }
}