const test = require("node:test");
const assert = require("node:assert/strict");
const { flattenInstructions, updateProgress } = require("../lib/recipe-progress");

const recipe = {
  recipeIngredient: ["1 cup flour", "1 egg"],
  recipeInstructions: ["Mix", { itemListElement: [{ text: "Bake" }] }]
};

test("flattens nested recipe instructions", () => {
  assert.deepEqual(flattenInstructions(recipe.recipeInstructions), ["Mix", "Bake"]);
});

test("updates and validates cooking progress", () => {
  const ingredientProgress = updateProgress(recipe, {}, {
    kind: "ingredient", index: 1, completed: true
  });
  assert.deepEqual(ingredientProgress, { completedIngredients: [1], completedSteps: [] });
  assert.deepEqual(updateProgress(recipe, ingredientProgress, {
    kind: "ingredient", index: 1, completed: false
  }), { completedIngredients: [], completedSteps: [] });
  assert.throws(() => updateProgress(recipe, {}, {
    kind: "step", index: 2, completed: true
  }), /does not exist/);
});