using Fake.DependencyInjection;
using Microsoft.Extensions.Options;
using Oms.Domain.SystemAggregate.Consts;
using Oms.Domain.SystemAggregate.Repositories;

namespace Oms.Application.Integrations.Itfx;

/// <summary>
/// itfx / API 中心运行时配置（优先「其他配置」api_center，回退 appsettings Oms:Itfx）。
/// </summary>
public interface IItfxGatewayConfigProvider
{
    Task<ItfxGatewayOptions> GetAsync(CancellationToken cancellationToken = default);
}

internal sealed class ItfxGatewayConfigProvider(
    ISystemOtherConfigRepository repository,
    IOptions<ItfxGatewayOptions> options) : IItfxGatewayConfigProvider, IScopedDependency
{
    public async Task<ItfxGatewayOptions> GetAsync(CancellationToken cancellationToken = default)
    {
        var fallback = options.Value;
        var entity = await repository.GetByConfigCodeAsync(SystemOtherConfigCodes.ApiCenter, cancellationToken);
        if (entity == null || !entity.Enabled)
        {
            return Clone(fallback);
        }

        return new ItfxGatewayOptions
        {
            BaseUrl = Coalesce(entity.BaseUrl, fallback.BaseUrl),
            AppKey = Coalesce(entity.AppKey, fallback.AppKey),
            AppSecret = Coalesce(entity.AppSecret, fallback.AppSecret),
            TimeoutSeconds = entity.TimeoutSeconds > 0 ? entity.TimeoutSeconds : fallback.TimeoutSeconds,
            Customs9610StandardCode = fallback.Customs9610StandardCode,
            Customs9610ManifestStandardCode = fallback.Customs9610ManifestStandardCode,
            Customs9610DeclarationFormStandardCode = fallback.Customs9610DeclarationFormStandardCode,
            Customs9610SupplierCode = fallback.Customs9610SupplierCode
        };
    }

    private static ItfxGatewayOptions Clone(ItfxGatewayOptions src) =>
        new()
        {
            BaseUrl = src.BaseUrl,
            AppKey = src.AppKey,
            AppSecret = src.AppSecret,
            TimeoutSeconds = src.TimeoutSeconds,
            Customs9610StandardCode = src.Customs9610StandardCode,
            Customs9610ManifestStandardCode = src.Customs9610ManifestStandardCode,
            Customs9610DeclarationFormStandardCode = src.Customs9610DeclarationFormStandardCode,
            Customs9610SupplierCode = src.Customs9610SupplierCode
        };

    private static string Coalesce(string? primary, string fallback) =>
        string.IsNullOrWhiteSpace(primary) ? fallback : primary.Trim();
}