import assert from "node:assert/strict";
import { test } from "node:test";
import { aggregateDays } from "../src/lib/days.ts";

const ID = "6f1a2b3c-4d5e-4f60-8a9b-0c1d2e3f4a5b";
const chunk = (date: string, at: number, km: number, kwh: number, sohPercent?: number) => ({
  installationId: ID,
  date,
  recordedAt: new Date(at),
  day: { km, kwh, hours: km / 50, socDrop: kwh / 0.6 },
  ...(sohPercent === undefined ? {} : { sohPercent }),
});

test("adds chunks up per day, newest day first, with a running lifetime", () => {
  const days = aggregateDays([
    chunk("2026-10-16", 1_000, 10, 2),
    chunk("2026-10-17", 3_000, 5, 1),
    chunk("2026-10-16", 2_000, 20, 3),
  ]);
  assert.deepEqual(days.map((d) => d.date), ["2026-10-17", "2026-10-16"]);
  assert.equal(days[1].day.km, 30);
  assert.equal(days[1].day.kwh, 5);
  assert.equal(days[1].recordedAt.getTime(), 2_000);
  assert.equal(days[1].lifetime?.km, 30);
  assert.equal(days[0].lifetime?.km, 35);
  assert.equal(days[0].lifetime?.kwh, 6);
});

test("the newest manual SoH of a day wins, and a day without one has none", () => {
  const days = aggregateDays([
    chunk("2026-10-16", 2_000, 1, 1, 96),
    chunk("2026-10-16", 1_000, 1, 1, 98),
    chunk("2026-10-17", 3_000, 1, 1),
  ]);
  assert.equal(days[1].sohPercent, 96);
  assert.equal("sohPercent" in days[0], false);
});