using System.Text.Json;
using MAX.Framework.Commons;

namespace Store.Shops.Services;

/// <summary>e57 店铺令牌查询；固定上游地址，失败重试一次，保留证书验证。</summary>
public sealed class PddTokenClient(HttpClient http) : IDisposable
{
    /// <summary>按拼多多商城ID获取授权资料。</summary>
    public Task<JsonElement> GetToken(string mallId, CancellationToken ct)
        => GetResult("info/forPdd?mallId=" + Uri.EscapeDataString(mallId), "data", ct);

    /// <summary>按微信AppId获取单店授权资料。</summary>
    public Task<JsonElement> GetShopToken(string appId, CancellationToken ct)
        => GetResult("info?appId=" + Uri.EscapeDataString(appId), "data", ct);

    /// <summary>按部署配置中的e57账号读取微信令牌列表。</summary>
    public Task<JsonElement> GetTokens(string userName, CancellationToken ct)
        => GetResult("list?userName=" + Uri.EscapeDataString(userName), "list", ct);

    /// <summary>解析上游业务状态，只返回指定数据节点，不泄露原始错误页面。</summary>
    private async Task<JsonElement> GetResult(string path, string property, CancellationToken ct)
    {
        var url = "https://po.e57.cn/prod-api/api/sys-api/system/open/api/shop/" + path;
        for (var attempt = 0; attempt < 2; attempt++)
        {
            try
            {
                using var response = await http.GetAsync(url, ct);
                if (!response.IsSuccessStatusCode) continue;
                using var json = await JsonDocument.ParseAsync(await response.Content.ReadAsStreamAsync(ct), cancellationToken: ct);
                var root = json.RootElement;
                if (root.ValueKind == JsonValueKind.Object
                    && root.TryGetProperty("code", out var code) && code.ValueKind == JsonValueKind.Number
                    && code.TryGetInt32(out var value) && value == 0
                    && root.TryGetProperty(property, out var data))
                    return data.Clone();
            }
            catch (HttpRequestException) { /* 上游网络失败按旧接口约定重试一次。 */ }
            catch (JsonException) { /* 非 JSON 上游响应按业务失败处理，不返回原始页面。 */ }
            catch (OperationCanceledException) when (!ct.IsCancellationRequested) { /* HttpClient 超时。 */ }
        }
        throw new AppException("获取店铺令牌失败，请稍后重试");
    }

    /// <summary>随容器关闭释放共享HTTP客户端。</summary>
    public void Dispose() => http.Dispose();
}