using Application.Abstractions.Crypto;
using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Microsoft.EntityFrameworkCore;
using SharedKernel.Results;

namespace Application.Features.Admin.Store.Shipment.Get;

public sealed class Handler(IAppDbContext db, IFieldEncryptor encryptor) : IQueryHandler<Query, Result<Response>>
{
    public async Task<Result<Response>> Handle(Query request, CancellationToken ct)
    {
        var shipment = await db.Shipment
            .AsNoTracking()
            .Include(s => s.Order).ThenInclude(o => o!.Member)
            .Where(s => s.ID == request.ID)
            .FirstOrDefaultAsync(ct);

        if (shipment is null)
        {
            return Result.Failure<Response>(Error.NotFound("Shipment.NotFound", "배송 정보를 찾을 수 없습니다."));
        }

        string? recipientName = null;
        string? phone = null;
        string? zipCode = null;
        string? address1 = null;
        string? address2 = null;

        if (request.WithAddress)
        {
            recipientName = encryptor.Decrypt(shipment.RecipientName_Encrypted, shipment.KeyVersion);
            phone = encryptor.Decrypt(shipment.Phone_Encrypted, shipment.KeyVersion);
            zipCode = shipment.ZipCode;
            address1 = encryptor.Decrypt(shipment.Address1_Encrypted, shipment.KeyVersion);
            address2 = encryptor.Decrypt(shipment.Address2_Encrypted, shipment.KeyVersion);
        }

        return Result.Success(new Response(
            ID: shipment.ID,
            OrderID: shipment.OrderID,
            OrderNumber: shipment.Order?.OrderNumber ?? "-",
            BuyerMemberID: shipment.Order?.MemberID ?? 0,
            BuyerEmail: shipment.Order?.Member?.Email ?? "-",
            Status: shipment.Status,
            Carrier: shipment.Carrier,
            TrackingNumber: shipment.TrackingNumber,
            ShippingFee: shipment.ShippingFee,
            AdminMemo: shipment.AdminMemo,
            CreatedAt: shipment.CreatedAt,
            ShippedAt: shipment.ShippedAt,
            DeliveredAt: shipment.DeliveredAt,
            RecipientName: recipientName,
            Phone: phone,
            ZipCode: zipCode,
            Address1: address1,
            Address2: address2
        ));
    }
}