namespace SmartB2B.Enova.Contracts;

public enum OrderSaveMode
{
    Buffer,
    Approved
}

public sealed record EnovaConnectionOptions(
    string DatabaseName,
    string OperatorName,
    string Password);

public sealed record EnovaAdapterConfiguration(
    EnovaConnectionOptions Connection,
    string DocumentDefinition,
    string? DefaultWarehouseCode,
    OrderSaveMode SaveMode);

public sealed class OrderRequest
{
    public string CustomerCode { get; init; } = string.Empty;

    public string? CustomerReference { get; init; }

    public string? Notes { get; init; }

    public string DocumentDefinition { get; init; } = "ZO";

    public string? WarehouseCode { get; init; }

    public OrderSaveMode SaveMode { get; init; } = OrderSaveMode.Buffer;

    public IReadOnlyList<OrderLineRequest> Items { get; init; } = [];
}

public sealed class OrderLineRequest
{
    public string ProductCode { get; init; } = string.Empty;

    public decimal Quantity { get; init; }

    public decimal UnitPrice { get; init; }

    public decimal Discount { get; init; }
}

public sealed record OrderResult(
    int Id,
    string Number,
    OrderSaveMode SaveMode,
    string CustomerCode,
    string WarehouseCode,
    string? CustomerReference,
    int LineCount,
    decimal Net,
    decimal Vat,
    decimal Gross,
    bool HasDiscount);

public sealed record EnovaAdapterInfo(
    string AdapterVersion,
    string SonetaBusinessVersion,
    string SonetaHandelVersion,
    string DatabaseName);

public interface IEnovaOrderAdapter
{
    EnovaAdapterInfo Initialize(EnovaAdapterConfiguration configuration);

    OrderResult CreateOrder(OrderRequest request);
}

public sealed class EnovaOperationException : Exception
{
    public EnovaOperationException(
        string errorUri,
        string message,
        IReadOnlyDictionary<string, object?>? details = null,
        Exception? innerException = null)
        : base(message, innerException)
    {
        ErrorUri = errorUri;
        Details = details ?? new Dictionary<string, object?>();
    }

    public string ErrorUri { get; }

    public IReadOnlyDictionary<string, object?> Details { get; }
}

public static class OrderValidator
{
    public static IReadOnlyList<string> Validate(OrderRequest? request)
    {
        var errors = new List<string>();

        if (request is null)
        {
            errors.Add("Brak danych zamówienia.");
            return errors;
        }

        if (string.IsNullOrWhiteSpace(request.CustomerCode))
        {
            errors.Add("Pole companyErpId jest wymagane.");
        }

        if (string.IsNullOrWhiteSpace(request.DocumentDefinition))
        {
            errors.Add("Definicja dokumentu jest wymagana.");
        }

        if (request.Items is null || request.Items.Count == 0)
        {
            errors.Add("Zamówienie musi zawierać co najmniej jedną pozycję.");
            return errors;
        }

        for (var index = 0; index < request.Items.Count; index++)
        {
            var line = request.Items[index];
            var prefix = $"lines[{index}]";

            if (line is null)
            {
                errors.Add($"{prefix}: pozycja nie może być pusta.");
                continue;
            }

            if (string.IsNullOrWhiteSpace(line.ProductCode))
            {
                errors.Add($"{prefix}.symbol jest wymagane.");
            }

            if (line.Quantity <= 0)
            {
                errors.Add($"{prefix}.quantity musi być większe od zera.");
            }

            if (line.UnitPrice < 0)
            {
                errors.Add($"{prefix}.price_netto nie może być ujemne.");
            }

            if (line.Discount is < 0 or > 100)
            {
                errors.Add($"{prefix}.discount musi mieścić się w zakresie 0-100.");
            }
        }

        return errors;
    }
}