namespace Oms.Application.Storage;

/// <summary>
/// 文件存储 key / URL 规范化。
/// </summary>
public static class FileStoragePath
{
    /// <summary>
    /// 规范化为库内 object key：uploads/a.jpg（无前导 /，完整 URL 取 AbsolutePath）。
    /// </summary>
    public static string NormalizeKey(string? pathOrUrl)
    {
        if (string.IsNullOrWhiteSpace(pathOrUrl))
        {
            throw new ArgumentException("路径不能为空", nameof(pathOrUrl));
        }

        var key = pathOrUrl.Trim().Replace('\\', '/');
        if (key.StartsWith("http://", StringComparison.OrdinalIgnoreCase)
            || key.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
        {
            key = new Uri(key).AbsolutePath;
        }

        key = key.TrimStart('/');
        if (string.IsNullOrWhiteSpace(key))
        {
            throw new ArgumentException("object key 不能为空", nameof(pathOrUrl));
        }

        return key;
    }

    /// <summary>
    /// 是否已是绝对 URL（含微信头像等外链）。
    /// </summary>
    public static bool IsAbsoluteUrl(string? value) =>
        !string.IsNullOrWhiteSpace(value)
        && (value.StartsWith("http://", StringComparison.OrdinalIgnoreCase)
            || value.StartsWith("https://", StringComparison.OrdinalIgnoreCase));
}