// render_math.mjs — rend en lot une liste de formules avec KaTeX.
// stdin : JSON [{mode:"inline"|"display", tex:"..."}] → stdout : JSON [{html, error}]
import katex from "katex";

const macros = {
  "\\up": "^{\\text{#1}}",
  "\\ier": "^{\\text{er}}",
  "\\iere": "^{\\text{re}}",
  "\\ieme": "^{\\text{e}}",
  "\\textonehalf": "\\tfrac{1}{2}",
  "\\textsuperscript": "^{\\text{#1}}",
  "\\oe": "\\text{œ}",
  "\\uqoalert": "\\textcolor{B22A20}{\\mathbf{#1}}",
  "\\uqotitle": "\\textcolor{003E7E}{\\mathbf{#1}}",
  "\\uqogreen": "\\textcolor{107C4E}{\\mathbf{#1}}",
  "\\uqohighlight": "\\textcolor{9E7D1C}{\\mathbf{#1}}",
  "\\emph": "\\textit{#1}",
  "\\textdegree": "^{\\circ}",
  "\\pgfmathprintnumber": "#1",
  "\\euro": "\\text{€}",
  "\\Ratio": "\\text{Ratio}",
  "\\RNE": "\\text{RNE}",
  "\\TGA": "\\text{TGA}",
};

let input = "";
process.stdin.setEncoding("utf8");
process.stdin.on("data", (d) => (input += d));
process.stdin.on("end", () => {
  const items = JSON.parse(input);
  const out = items.map(({ mode, tex }) => {
    try {
      const html = katex.renderToString(tex, {
        displayMode: mode === "display",
        throwOnError: true,
        strict: "ignore",
        trust: false,
        macros: { ...macros },
        output: "htmlAndMathml",
        fleqn: false,
      });
      return { html, error: null };
    } catch (e) {
      // seconde tentative tolérante
      try {
        const html = katex.renderToString(tex, {
          displayMode: mode === "display",
          throwOnError: false,
          strict: "ignore",
          macros: { ...macros },
          output: "htmlAndMathml",
        });
        return { html, error: String(e.message || e) };
      } catch (e2) {
        return { html: `<code class="math-error">${tex.replace(/</g, "&lt;")}</code>`, error: String(e2.message || e2) };
      }
    }
  });
  process.stdout.write(JSON.stringify(out));
});