// Tests for the band-price minting tool's pure parts — the committed table
// must stay the doc's matrix.  node test/stripe-band-prices.test.mjs
import assert from "node:assert/strict";
import { BAND_TABLE, priceLabel, netEURYear } from "../tools/stripe-band-prices.mjs";

let failures = 0;
async function test(name, fn) {
  try {
    await fn();
    console.log("PASS  " + name);
  } catch (e) {
    console.log("FAIL  " + name + "  —  " + (e && e.message));
    failures++;
  }
}

await test("the table is the elevens ladder — 11 prices in all", () => {
  // 3 base + 8 band prices: nominally 3 × 4, minus Business's solidarity
  // (deliberately absent — a hardship price aimed at businesses never
  // parsed; Reduced at €5.50/person covers nonprofits/education).
  const tiers = Object.keys(BAND_TABLE);
  assert.deepEqual(tiers, ["family", "community", "business"]);
  const bandCount = tiers.reduce((n, t) => n + Object.keys(BAND_TABLE[t].bands).length, 0);
  assert.equal(tiers.length + bandCount, 11);
  assert.ok(!BAND_TABLE.business.bands.solidarity, "business must not offer solidarity");
  // Spot-pin the ladder's load-bearing figures (decimal cents).
  assert.equal(BAND_TABLE.family.base, "550");
  assert.equal(BAND_TABLE.community.base, "11");
  assert.equal(BAND_TABLE.business.base, "1100");
  assert.equal(BAND_TABLE.business.bands.supporter, "1500");
  assert.equal(BAND_TABLE.business.bands.reduced, "550");
  // The included-members identity: €0.11 × the 100-member floor = the €11
  // minimum, and every band scales it (supporter €15, reduced €5.50).
  assert.equal(BAND_TABLE.community.minSeats, 100);
  assert.equal(Number(BAND_TABLE.community.base) * BAND_TABLE.community.minSeats, 1100);
  // Bands only ever use the fixed vocabulary; per-unit tiers name their unit.
  for (const t of tiers) {
    for (const b of Object.keys(BAND_TABLE[t].bands)) {
      assert.ok(["supporter", "reduced", "solidarity"].includes(b), `${t}: unknown band ${b}`);
    }
    assert.ok([null, "member", "seat"].includes(BAND_TABLE[t].unit));
  }
});

await test("priceLabel: whole euros bare, cents as a pair, sub-cent to three places", () => {
  assert.equal(priceLabel("550", null), "€5.50/year");
  assert.equal(priceLabel("1100", "seat"), "€11/seat/year");
  assert.equal(priceLabel("11", "member"), "€0.11/member/year");
  assert.equal(priceLabel("5.5", "member"), "€0.055/member/year");
  assert.equal(priceLabel("139900", null), "€1,399/year");
});

await test("netEURYear: the EEA fee model — flat absorbs the fixed fee, per-unit doesn't", () => {
  // Flat annual: one charge — €5.50 → 5.50 − 0.0825 − 0.25 = 5.168.
  assert.equal(netEURYear("550", null), 5.168);
  // Per-unit rates only carry the percentage; the €0.25 lands once per space.
  assert.equal(netEURYear("1100", "seat"), 10.835);
  assert.equal(netEURYear("11", "member"), 0.108);
});

console.log(failures === 0 ? "\nALL PASSED" : `\n${failures} FAILED`);
process.exit(failures === 0 ? 0 : 1);