import { describe, it, expect } from "vitest";
import { readReceiptOutput } from "../src/tasks.js";

/**
 * Regression: kvitto-skanning kraschade på "svar matchar inte schema … invalid
 * value" när Gemini läste kvitto-enheter som "st", "kg", "förp". Enheten ska nu
 * normaliseras till en giltig kod eller null – aldrig fälla hela svaret.
 */

function receiptWith(unit: unknown) {
  return {
    storeName: "ICA",
    purchaseDate: "2026-08-19",
    lines: [
      {
        rawText: "Rad",
        normalizedName: "Vara",
        canonicalIngredientId: null,
        quantity: 1,
        unit,
        unitPriceMinor: null,
        totalPriceMinor: 1500,
        isDiscount: false,
        confidence: 0.8,
      },
    ],
    totalMinor: 1500,
    discountTotalMinor: null,
    confidence: 0.8,
  };
}

describe("kvitto: robust enhetstolkning", () => {
  const cases: Array<[unknown, string | null]> = [
    ["st", "COUNT"],
    ["styck", "COUNT"],
    ["kg", "KILOGRAM"],
    ["g", "GRAM"],
    ["GRAM", "GRAM"],
    ["dl", "DECILITER"],
    ["ml", "MILLILITER"],
    ["l", "LITER"],
    ["förp", "PACKAGE"],
    ["paket", "PACKAGE"],
    ["påse", "PACKAGE"],
    ["burk", "CAN"],
    ["kg.", "KILOGRAM"], // med skiljetecken
    ["  St  ", "COUNT"], // whitespace + versal
    ["xyz", null], // okänd → null (kraschar inte)
    [null, null],
  ];

  for (const [input, expected] of cases) {
    it(`"${String(input)}" → ${expected}`, () => {
      const result = readReceiptOutput.safeParse(receiptWith(input));
      expect(result.success).toBe(true);
      if (result.success) {
        expect(result.data.lines[0]!.unit).toBe(expected);
      }
    });
  }

  it("ett okänt enhetsvärde fäller inte hela kvittot", () => {
    const result = readReceiptOutput.safeParse(receiptWith("2-pack"));
    expect(result.success).toBe(true);
  });
});