using Microsoft.Win32;
using AllBase.Helper;
using System;
using System.Security.Cryptography;
using System.Text;

namespace Work.Store.Api;

/// <summary>全局共用一个用户会话与请求出口，窗体通过 Instance 访问。</summary>
public sealed class StoreApiClient
{
    private static readonly string BaseUrl = EnvironmentHelper.IsProduction
        ? "http://103.90.155.78:9001/api/"
        : "http://localhost:14312/api/";

    public static StoreApiClient Instance { get; } = new StoreApiClient();

    public ApiTransport Transport { get; }
    public AuthApi Auth { get; }
    public CloudGoodsApi CloudGoods { get; }
    //public GoodsComplianceApi GoodsCompliance { get; }
    public ImageCacheApi ImageCache { get; }
    /// <summary>当前 Windows 安装的 SHA-256 设备指纹，登录时作为 DeviceId 发送。</summary>
    public string DeviceId { get; }

    private StoreApiClient()
    {
        DeviceId = CreateDeviceId();
        Transport = new ApiTransport(BaseUrl);
        Auth = new AuthApi(Transport, DeviceId);
        CloudGoods = new CloudGoodsApi(Transport);
        //GoodsCompliance = new GoodsComplianceApi(Transport);
        ImageCache = new ImageCacheApi(Transport);
    }

    private static string CreateDeviceId()
    {
        using (var machine = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry64))
        using (var key = machine.OpenSubKey(@"SOFTWARE\Microsoft\Cryptography"))
        {
            if (!Guid.TryParse(key?.GetValue("MachineGuid") as string, out var machineGuid) || machineGuid == Guid.Empty)
                throw new InvalidOperationException("无法读取有效的 Windows MachineGuid，不能生成设备指纹。");

            using (var sha256 = SHA256.Create())
                return BitConverter.ToString(sha256.ComputeHash(
                    Encoding.UTF8.GetBytes("Store.Api:" + machineGuid.ToString("D")))).Replace("-", "");
        }
    }

    /// <summary>清除内存中的 Token 和自动登录凭据，不调用服务端退出接口。</summary>
    public void ClearSession() => Transport.Token = null;
}