using System.ComponentModel.DataAnnotations;
using LittleShop.Enums;

namespace LittleShop.DTOs;

public class OrderDto
{
    public Guid Id { get; set; }
    public Guid? CustomerId { get; set; }
    public string? IdentityReference { get; set; }
    public OrderStatus Status { get; set; }
    
    // Customer Information (embedded for convenience)
    public CustomerSummaryDto? Customer { get; set; }
    public decimal TotalAmount { get; set; }
    public string Currency { get; set; } = "GBP";
    public string ShippingName { get; set; } = string.Empty;
    public string ShippingAddress { get; set; } = string.Empty;
    public string ShippingCity { get; set; } = string.Empty;
    public string ShippingPostCode { get; set; } = string.Empty;
    public string ShippingCountry { get; set; } = string.Empty;
    public string? Notes { get; set; }
    public string? TrackingNumber { get; set; }
    public DateTime CreatedAt { get; set; }
    public DateTime UpdatedAt { get; set; }
    public DateTime? PaidAt { get; set; }

    // Workflow timestamps
    public DateTime? AcceptedAt { get; set; }
    public DateTime? PackingStartedAt { get; set; }
    public DateTime? DispatchedAt { get; set; }
    public DateTime? ExpectedDeliveryDate { get; set; }
    public DateTime? ActualDeliveryDate { get; set; }
    public DateTime? OnHoldAt { get; set; }

    // Workflow details
    public string? AcceptedByUser { get; set; }
    public string? PackedByUser { get; set; }
    public string? DispatchedByUser { get; set; }
    public string? OnHoldReason { get; set; }

    // Legacy field (for backward compatibility)
    public DateTime? ShippedAt { get; set; }

    public List<OrderItemDto> Items { get; set; } = new();
    public List<CryptoPaymentDto> Payments { get; set; } = new();
}

public class OrderItemDto
{
    public Guid Id { get; set; }
    public Guid ProductId { get; set; }
    public Guid? ProductMultiBuyId { get; set; }
    public string ProductName { get; set; } = string.Empty;
    public string? ProductMultiBuyName { get; set; }
    public string? SelectedVariant { get; set; }
    public int Quantity { get; set; }
    public decimal UnitPrice { get; set; }
    public decimal TotalPrice { get; set; }
}

public class CreateOrderDto
{
    // Either Customer ID (for registered customers) OR Identity Reference (for anonymous)
    public Guid? CustomerId { get; set; }
    
    public string? IdentityReference { get; set; }
    
    // Customer Information (collected at checkout for anonymous orders)
    public CreateCustomerDto? CustomerInfo { get; set; }
    
    [Required]
    public string ShippingName { get; set; } = string.Empty;
    
    [Required]
    public string ShippingAddress { get; set; } = string.Empty;
    
    [Required]
    public string ShippingCity { get; set; } = string.Empty;
    
    [Required]
    public string ShippingPostCode { get; set; } = string.Empty;
    
    [Required]
    public string ShippingCountry { get; set; } = "United Kingdom";
    
    [Required]
    public List<CreateOrderItemDto> Items { get; set; } = new();
    
    public string? Notes { get; set; }
}

public class CreateOrderItemDto
{
    [Required]
    public Guid ProductId { get; set; }

    public Guid? ProductMultiBuyId { get; set; } // Optional: if specified, use multi-buy pricing

    public string? SelectedVariant { get; set; } // Optional: variant choice (color/flavor)

    [Range(1, int.MaxValue)]
    public int Quantity { get; set; }
}

public class UpdateOrderStatusDto
{
    public OrderStatus Status { get; set; }
    public string? TrackingNumber { get; set; }
    public string? Notes { get; set; }
}

// New workflow DTOs
public class AcceptOrderDto
{
    public string? Notes { get; set; }
}

public class StartPackingDto
{
    public string? Notes { get; set; }
}

public class DispatchOrderDto
{
    [Required]
    [StringLength(100)]
    public string TrackingNumber { get; set; } = string.Empty;

    public int EstimatedDeliveryDays { get; set; } = 3; // Default 3 working days
    public string? Notes { get; set; }
}

public class PutOnHoldDto
{
    [Required]
    [StringLength(500)]
    public string Reason { get; set; } = string.Empty;

    public string? Notes { get; set; }
}

public class MarkDeliveredDto
{
    public DateTime? ActualDeliveryDate { get; set; }
    public string? Notes { get; set; }
}