using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using Domain.Entities.Store.ValueObject;

namespace Domain.Entities.Store;

/// <summary>
/// 배송 정보. Order 1:1 (Physical 상품 포함 주문 시점에 생성).
/// 주문 시점의 회원 주소 스냅샷을 보존 (회원이 추후 주소 변경해도 영향 없음). 암호화는 MemberAddress 와 동일.
/// </summary>
public class Shipment
{
    [ForeignKey(nameof(OrderID))]
    public virtual Order? Order { get; private set; }

    [Key]
    public int ID { get; private set; }

    public int OrderID { get; private set; }

    // 주소 스냅샷 (암호화)
    public string RecipientName_Encrypted { get; private set; } = default!;

    public string Phone_Encrypted { get; private set; } = default!;

    public string ZipCode { get; private set; } = default!;

    public string Address1_Encrypted { get; private set; } = default!;

    public string Address2_Encrypted { get; private set; } = default!;

    public int KeyVersion { get; private set; }

    public ShipmentStatus Status { get; private set; } = ShipmentStatus.Preparing;

    public string? Carrier { get; private set; }

    public string? TrackingNumber { get; private set; }

    /// <summary>배송비 (원) — 관리자 수동 입력. 기본 0.</summary>
    public int ShippingFee { get; private set; }

    /// <summary>관리자 메모 (운영용 내부 메모, 최대 500자)</summary>
    public string? AdminMemo { get; private set; }

    public DateTime CreatedAt { get; private set; } = DateTime.UtcNow;

    public DateTime? ShippedAt { get; private set; }

    public DateTime? DeliveredAt { get; private set; }

    private Shipment() { }

    public static Shipment Create(
        int orderID,
        string recipientNameEncrypted,
        string phoneEncrypted,
        string zipCode,
        string address1Encrypted,
        string address2Encrypted,
        int keyVersion
    ) {
        if (orderID <= 0)
        {
            throw new ArgumentOutOfRangeException(nameof(orderID));
        }

        if (string.IsNullOrWhiteSpace(recipientNameEncrypted))
        {
            throw new ArgumentException("RecipientName_Encrypted is required.", nameof(recipientNameEncrypted));
        }

        if (string.IsNullOrWhiteSpace(phoneEncrypted))
        {
            throw new ArgumentException("Phone_Encrypted is required.", nameof(phoneEncrypted));
        }

        if (string.IsNullOrWhiteSpace(zipCode))
        {
            throw new ArgumentException("ZipCode is required.", nameof(zipCode));
        }

        if (zipCode.Length > 10)
        {
            throw new ArgumentOutOfRangeException(nameof(zipCode));
        }

        if (string.IsNullOrWhiteSpace(address1Encrypted))
        {
            throw new ArgumentException("Address1_Encrypted is required.", nameof(address1Encrypted));
        }

        if (string.IsNullOrWhiteSpace(address2Encrypted))
        {
            throw new ArgumentException("Address2_Encrypted is required.", nameof(address2Encrypted));
        }

        if (keyVersion <= 0)
        {
            throw new ArgumentOutOfRangeException(nameof(keyVersion));
        }

        return new Shipment
        {
            OrderID = orderID,
            RecipientName_Encrypted = recipientNameEncrypted,
            Phone_Encrypted = phoneEncrypted,
            ZipCode = zipCode,
            Address1_Encrypted = address1Encrypted,
            Address2_Encrypted = address2Encrypted,
            KeyVersion = keyVersion
        };
    }

    public void RegisterTracking(string carrier, string trackingNumber)
    {
        if (string.IsNullOrWhiteSpace(carrier))
        {
            throw new ArgumentException("Carrier is required.", nameof(carrier));
        }

        if (carrier.Length > 50)
        {
            throw new ArgumentOutOfRangeException(nameof(carrier));
        }

        if (string.IsNullOrWhiteSpace(trackingNumber))
        {
            throw new ArgumentException("TrackingNumber is required.", nameof(trackingNumber));
        }

        if (trackingNumber.Length > 50)
        {
            throw new ArgumentOutOfRangeException(nameof(trackingNumber));
        }

        Carrier = carrier;
        TrackingNumber = trackingNumber;

        if (Status == ShipmentStatus.Preparing)
        {
            Status = ShipmentStatus.Pickup;
        }
    }

    public void MarkInTransit()
    {
        if (Status is not ShipmentStatus.Pickup and not ShipmentStatus.Preparing)
        {
            throw new InvalidOperationException($"Cannot mark in transit from status {Status}.");
        }

        Status = ShipmentStatus.InTransit;
        ShippedAt = DateTime.UtcNow;
    }

    public void MarkDelivered()
    {
        if (Status != ShipmentStatus.InTransit)
        {
            throw new InvalidOperationException($"Cannot mark delivered from status {Status}.");
        }

        Status = ShipmentStatus.Delivered;
        DeliveredAt = DateTime.UtcNow;
    }

    public void MarkFailed()
    {
        Status = ShipmentStatus.Failed;
    }

    /// <summary>배송비 + 관리자 메모 동시 갱신 (배송 상세 form 에서 호출)</summary>
    public void UpdateBillingInfo(int shippingFee, string? adminMemo)
    {
        if (shippingFee < 0)
        {
            throw new ArgumentOutOfRangeException(nameof(shippingFee), "ShippingFee must be >= 0.");
        }

        if (adminMemo is { Length: > 500 })
        {
            throw new ArgumentOutOfRangeException(nameof(adminMemo), "AdminMemo max length is 500.");
        }

        ShippingFee = shippingFee;
        AdminMemo = string.IsNullOrWhiteSpace(adminMemo) ? null : adminMemo.Trim();
    }
}