import { describe, expect, test } from "bun:test";
import { jsPDF } from "jspdf";
import { buildPlanModel, pdfSafe, renderPlanPdf } from "./exportPlan";
import { RECIPES } from "./recipes";

const breakfast = RECIPES.find((r) => r.kind === "breakfast")!;
const dinner = RECIPES.find((r) => r.kind === "main")!;

const state = {
  daysCount: 2,
  mealsPerDay: 3,
  householdSize: 4,
  // Monday breakfast + dinner, Tuesday dinner; "6-3" is outside daysCount and must not export.
  slots: { "0-1": breakfast.id, "0-3": dinner.id, "1-3": dinner.id, "6-3": dinner.id },
};

describe("plan export", () => {
  const model = buildPlanModel(state);

  test("organizes meals under each planned day, in meal order", () => {
    expect(model.days.map((d) => d.name)).toEqual(["Monday", "Tuesday"]);
    const [monday, tuesday] = model.days;
    expect(monday.meals.map((m) => ("empty" in m ? `${m.label}: -` : `${m.label}: ${m.title}`))).toEqual([
      `Breakfast: ${breakfast.title}`,
      "Lunch: -",
      `Dinner: ${dinner.title}`,
    ]);
    expect(tuesday.meals.filter((m) => !("empty" in m))).toHaveLength(1);
  });

  test("each meal carries its full recipe, scaled to the household", () => {
    const meal = model.days[0].meals[0];
    if ("empty" in meal) throw new Error("expected a planned meal");
    expect(meal.steps).toEqual(breakfast.steps);
    expect(meal.ingredients).toHaveLength(breakfast.ingredients.length);
    expect(meal.meta).toContain("serves 4");
  });

  test("text is made printable in the base PDF font", () => {
    expect(pdfSafe("1⅓ cup flour")).toBe("1 1/3 cup flour");
    expect(pdfSafe("⅛ tsp salt")).toBe("1/8 tsp salt");
    expect(pdfSafe("½ cup · 350°F — Rakı")).toBe("½ cup · 350°F — Raki");
  });

  test("renders a real multi-page PDF (one day per page)", () => {
    const bytes = new Uint8Array(renderPlanPdf(model, jsPDF).output("arraybuffer"));
    expect(new TextDecoder().decode(bytes.slice(0, 5))).toBe("%PDF-");
    expect(renderPlanPdf(model, jsPDF).getNumberOfPages()).toBeGreaterThanOrEqual(2);
  });
});