import { Liquid } from "liquidjs";
import type { ParsedLure, LureRequest } from "./types.js";

const engine = new Liquid({ strictVariables: false, strictFilters: false });

export async function renderTemplate(lure: ParsedLure, req: LureRequest): Promise<string> {
  let payload: unknown = null;

  if (lure.frontmatter.payload?.contentType === "json") {
    const text = new TextDecoder().decode(req.rawBody);
    payload = JSON.parse(text) as unknown;
  }

  const scope: Record<string, unknown> = {
    payload,
    headers: Object.fromEntries(req.headers),
    query: Object.fromEntries(req.query),
  };

  return engine.parseAndRender(lure.template, scope);
}