using System.Text.Json;
using Aop.Api;
using Tiku.Application.Commerce;

namespace Tiku.Infrastructure.Commerce;

internal sealed class AlipayProvider : IPaymentProvider
{
    public string Provider => PaymentProviders.Alipay;

    public Task<CreatePaymentProviderResult> CreatePaymentAsync(
        PaymentProviderAccount account,
        CreatePaymentProviderRequest request,
        CancellationToken cancellationToken = default)
    {
        _ = BuildClient(account);
        throw new PaymentProviderException(
            "Alipay SDK is configured; checkout call is enabled in the commerce checkout batch.",
            "alipay_checkout_not_enabled");
    }

    public Task<PaymentNotificationResult> ParsePaymentNotificationAsync(
        PaymentProviderAccount account,
        PaymentNotificationRequest request,
        CancellationToken cancellationToken = default)
    {
        _ = BuildClient(account);
        throw new PaymentProviderException(
            "Alipay SDK is configured; notification parsing is enabled in the notification batch.",
            "alipay_notification_not_enabled");
    }

    private static DefaultAopClient BuildClient(PaymentProviderAccount account)
    {
        return new DefaultAopClient(
            Required(account.ConfigPublic, "gatewayUrl", "gateway"),
            Required(account.ConfigPublic, "appId"),
            Required(account.SecretPayload, "privateKey", "appPrivateKey"),
            "json",
            "1.0",
            "RSA2",
            Required(account.ConfigPublic, "alipayPublicKey"),
            "UTF-8",
            false);
    }

    private static string Required(JsonElement element, params string[] keys)
    {
        if (element.ValueKind == JsonValueKind.Object)
        {
            foreach (var key in keys)
            {
                if (element.TryGetProperty(key, out var property) &&
                    property.ValueKind == JsonValueKind.String &&
                    !string.IsNullOrWhiteSpace(property.GetString()))
                {
                    return property.GetString()!;
                }
            }
        }

        throw new PaymentProviderException(
            "Alipay provider configuration is incomplete.",
            "alipay_config_incomplete");
    }
}