/**
 * Parsing pur des fichiers `.bentext` (sources recette).
 * Aucun effet de bord : ne touche pas au système de fichiers, au catalogue,
 * ni aux assets. Utilisé par `scripts/build-recipes.mjs`.
 *
 * Format bentext :
 *   Title
 *   Version
 *   Description
 *   ---
 *   Ingredients (une ligne par ingrédient : `Nom|quantité|unité|note`)
 *   ---
 *   Steps (une ligne par étape, ordre du fichier = priorité)
 *   ---
 *   Notes            (optionnel, présent si 6+ blocs `---`)
 *   Tags             (optionnel dès 4 blocs)
 *   Meta             (optionnel dès 5 blocs)
 */

const splitIngredientLine = (line) => {
  const parts = line.split("|").map((token) => token.trim());
  const name = parts[0] ?? "";
  const quantity = Number(parts[1] ?? "0");
  const unit = parts[2] ?? "";
  const note = parts.slice(3).join(" | ").trim();
  return { name, quantity, unit, note };
};

const splitNonEmptyLines = (raw) =>
  raw
    .split("\n")
    .map((line) => line.trim())
    .filter(Boolean);

const readBentext = (raw) => {
  const parts = raw.split("---").map((part) => part.trim());

  const header = (parts[0] ?? "").split("\n").map((line) => line.trim());
  const title = header[0] ?? "";
  const version = header[1] ?? "";
  const servings = Number.parseInt(version, 10);
  const description = header.slice(2).join("\n").trim();

  const ingredientsBlock = parts[1] ?? "";
  const stepsBlock = parts[2] ?? "";

  let notesBlock = "";
  let tagsBlock = "";
  let metaBlock = "";

  if (parts.length === 4) {
    tagsBlock = parts[3] ?? "";
  } else if (parts.length === 5) {
    tagsBlock = parts[3] ?? "";
    metaBlock = parts[4] ?? "";
  } else if (parts.length >= 6) {
    notesBlock = parts[3] ?? "";
    tagsBlock = parts[4] ?? "";
    metaBlock = parts[5] ?? "";
  }

  const stepLines = splitNonEmptyLines(stepsBlock);
  const steps = stepLines.map((line, index) => ({
    id: `step-${index + 1}`,
    priority: (index + 1) * 10,
    phase: "cook",
    dependsOn: index === 0 ? [] : [`step-${index}`],
    text: line
  }));

  return {
    title,
    version,
    servings: Number.isFinite(servings) && servings > 0 ? servings : 1,
    description,
    ingredients: splitNonEmptyLines(ingredientsBlock).map((line) => splitIngredientLine(line)),
    steps,
    notes: splitNonEmptyLines(notesBlock),
    tags: splitNonEmptyLines(tagsBlock).map((line) => line.toLowerCase()),
    meta: splitNonEmptyLines(metaBlock)
  };
};

export { readBentext, splitIngredientLine };