import { T as TemplateRenderer } from "../packem_shared/types.d-BU-37j3S.js";
/** Options for {@link defineLayout}. */
interface LayoutOptions {
  /**
   * The renderer used for the layout template. Defaults to the zero-dependency
   * `renderString` (`{{var}}`); pass the Handlebars/Liquid renderer for logic.
   */
  render?: TemplateRenderer;
  /** Name of the slot variable the content is injected as. Defaults to `"content"`. */
  slot?: string;
  /**
   * The layout template. Must contain the slot placeholder (default `{{content}}`).
   * With the Handlebars renderer use the unescaped `{{{content}}}` so the already-
   * rendered HTML body is not double-escaped.
   */
  template: string;
}
/** A reusable layout: renders a content string into its slot, then renders the wrapper. */
interface Layout {
  /**
   * Wrap `content` in the layout.
   * @param content The already-rendered body to inject into the slot.
   * @param variables Extra variables available to the layout template (e.g. `unsubscribeUrl`).
   */
  render: (content: string, variables?: Record<string, unknown>) => Promise<string>;
}
/**
 * Define a reusable content layout — shared chrome (header/footer/brand) with a
 * `{{content}}` slot the per-notification body drops into. Code-first and engine-
 * agnostic: it reuses the package's template renderers, so it stays edge-safe with
 * the default `renderString`.
 * @param options The layout template, optional renderer and slot name.
 * @returns A {@link Layout} whose `render(content, vars)` returns the wrapped string.
 * @example
 * ```ts
 * const branded = defineLayout({
 *     template: `<table><tr><td>{{content}}</td></tr><tr><td><a href="{{unsubscribeUrl}}">unsubscribe</a></td></tr></table>`,
 * });
 *
 * const html = await branded.render("<p>Welcome!</p>", { unsubscribeUrl: "https://app/u/123" });
 * await notify.sendToChannel("email", { from, to, subject: "Hi", html });
 * ```
 */
declare const defineLayout: (options: LayoutOptions) => Layout;
export { type Layout, type LayoutOptions, defineLayout };