using System.Text.RegularExpressions;

namespace Application.Common;

internal static class EmailTemplateExtensions
{
    public static string Render(this string? template, params (string Key, string Value)[] tokens)
    {
        if (string.IsNullOrWhiteSpace(template)) { return string.Empty; }
        var result = template;
        foreach (var (key, value) in tokens)
        {
            // {key} 치환 — 토큰 키 대소문자 무시 ({Code}/{code} 등 모두 인식)
            var pattern = Regex.Escape("{" + key + "}");
            var replacement = (value ?? string.Empty).Replace("$", "$$");
            result = Regex.Replace(result, pattern, replacement, RegexOptions.IgnoreCase);
        }
        return result;
    }
}