import {
  type CreateRecipeInput,
  createRecipeSchema,
  type RecipeImportDraftView,
} from "@batch-cooking/shared";

/**
 * Attempts to turn `draft` straight into a submittable {@link CreateRecipeInput}
 * — no form, no person involved — for the planning picker's transparent
 * import path (`RecipePickerDialog`'s `handleSelectDraftItem`): adding a
 * not-yet-imported source item to a planning slot should just work,
 * silently, whenever nothing about it actually needs a human's judgment
 * call. Returns `null` the moment anything does — an ingredient line the
 * automatic matcher (`ingredient-matcher.ts`) couldn't resolve to a real
 * ingredient/unit/quantity, or a missing portions count — so the caller can
 * fall back to the full review screen (`ImportRecipePage`), pre-filled from
 * this exact same draft, for a person to fill in what's missing.
 *
 * Default `visibility`/`dietIds` mirror what a person would otherwise leave
 * untouched on that same form (`PERSONAL`, no diet tags) — nothing here is
 * a guess about data the draft doesn't have an opinion on.
 * `createRecipeSchema.safeParse` is still the actual authority on whether
 * the result is submittable (a positive-portions check, string lengths,
 * etc.) — the checks above it exist only for what a schema alone can't
 * catch: `ingredient`/`unit` being resolved references, not just present
 * values.
 */
export function tryBuildCompleteImport(draft: RecipeImportDraftView): CreateRecipeInput | null {
  if (draft.portions === null) return null;
  if (draft.ingredients.length === 0) return null;
  if (
    draft.ingredients.some(
      (line) => line.ingredient === null || line.unit === null || line.quantity === null,
    )
  ) {
    return null;
  }

  const candidate: CreateRecipeInput = {
    name: draft.name,
    description: draft.description,
    picture: draft.picture,
    portions: draft.portions,
    visibility: "PERSONAL",
    dietIds: [],
    ingredients: draft.ingredients.map((line) => ({
      // Every line is fully resolved by this point — guarded above.
      ingredientId: (line.ingredient as NonNullable<typeof line.ingredient>).id,
      quantity: line.quantity as number,
      unitId: (line.unit as NonNullable<typeof line.unit>).id,
    })),
    steps: draft.steps.map((step) => ({
      description: step.description,
      picture: step.picture,
    })),
  };

  const result = createRecipeSchema.safeParse(candidate);
  return result.success ? result.data : null;
}