export declare const mermaidTemplate = "import \"server-only\";\nimport { renderMermaidSVG } from \"beautiful-mermaid\";\n\nconst DIAGRAM_OPTIONS = {\n  bg: \"var(--mermaid-bg)\",\n  fg: \"var(--mermaid-fg)\",\n  line: \"var(--mermaid-line)\",\n  accent: \"var(--mermaid-accent)\",\n  muted: \"var(--mermaid-muted)\",\n  surface: \"var(--mermaid-surface)\",\n  border: \"var(--mermaid-border)\",\n  transparent: true,\n};\n\nexport type MermaidResult =\n  | { ok: true; svg: string; width: number | null }\n  | { ok: false; error: string };\n\nfunction parseColor(value: string): [number, number, number] | null {\n  const hex = /^#([0-9a-f]{3,8})$/i.exec(value.trim());\n  if (hex) {\n    let channels = hex[1];\n    if (channels.length === 3 || channels.length === 4) {\n      channels = channels\n        .slice(0, 3)\n        .split(\"\")\n        .map((c) => c + c)\n        .join(\"\");\n    }\n    if (channels.length !== 6 && channels.length !== 8) return null;\n    return [\n      Number.parseInt(channels.slice(0, 2), 16),\n      Number.parseInt(channels.slice(2, 4), 16),\n      Number.parseInt(channels.slice(4, 6), 16),\n    ];\n  }\n  const rgb = /^rgba?\\(\\s*(\\d+)[\\s,]+(\\d+)[\\s,]+(\\d+)/i.exec(value.trim());\n  if (rgb) return [Number(rgb[1]), Number(rgb[2]), Number(rgb[3])];\n  return null;\n}\n\n// beautiful-mermaid labels nodes with the theme foreground (white in dark\n// mode) even when the diagram sets an explicit fill via classDef/style, which\n// leaves white text on light colored boxes. The SVG renders once and is shared\n// by both modes, so bake a literal contrast color into the labels of nodes\n// whose shape has a literal fill.\nfunction contrastNodeLabels(svg: string): string {\n  return svg.replace(/<g class=\"node\"[^>]*>[\\s\\S]*?<\\/g>/g, (group) => {\n    const shapeFill = /fill=\"([^\"]*)\"/.exec(group)?.[1] ?? \"\";\n    if (shapeFill.startsWith(\"var(\") || shapeFill === \"none\") return group;\n    const rgb = parseColor(shapeFill);\n    // YIQ perceived brightness. Unparseable literals (named colors) default\n    // to black text \u2014 classDef fills are overwhelmingly light pastels.\n    const yiq = rgb ? (rgb[0] * 299 + rgb[1] * 587 + rgb[2] * 114) / 1000 : 255;\n    const label = yiq >= 128 ? \"#000000\" : \"#ffffff\";\n    return group.replace(\n      /(<text[^>]*fill=\")var\\(--_text\\)(\")/g,\n      \"$1\" + label + \"$2\",\n    );\n  });\n}\n\nfunction normalizeSvg(svg: string): {\n  ok: true;\n  svg: string;\n  width: number | null;\n} {\n  const openTag = /^<svg\\b[^>]*>/.exec(svg);\n  if (!openTag) return { ok: true, svg, width: null };\n\n  const widthMatch = /\\swidth=\"([\\d.]+)\"/.exec(openTag[0]);\n  const width = widthMatch ? Number.parseFloat(widthMatch[1]) : null;\n\n  const stripped = openTag[0].replace(/\\s(?:width|height)=\"[^\"]*\"/g, \"\");\n  return {\n    ok: true,\n    svg: stripped + svg.slice(openTag[0].length),\n    width: width !== null && Number.isFinite(width) ? width : null,\n  };\n}\n\nexport function renderDiagram(code: string): MermaidResult {\n  try {\n    return normalizeSvg(\n      contrastNodeLabels(renderMermaidSVG(code, DIAGRAM_OPTIONS)),\n    );\n  } catch (error) {\n    return {\n      ok: false,\n      error: error instanceof Error ? error.message : String(error),\n    };\n  }\n}\n";