// Phase 1 of self-serve subscriptions: prepaid-period expiry enforcement +
// the extend-from-current-expiry logic both payment rails will call.

import { test, describe, before } from "node:test";
import assert from "node:assert/strict";
import { mkdtempSync } from "node:fs";
import { tmpdir } from "node:os";
import path from "node:path";

import { identityTier, isSubscriptionExpired } from "../identity.js";
import { initCredits, extendUserTier, getUserCreditRow } from "../credits.js";

const DAY = 24 * 60 * 60 * 1000;

describe("subscription expiry enforcement (pure)", () => {
  test("isSubscriptionExpired: null / future / past / invalid", () => {
    assert.equal(isSubscriptionExpired({}), false);
    assert.equal(isSubscriptionExpired({ subscription_expires_at: null }), false);
    assert.equal(
      isSubscriptionExpired({ subscription_expires_at: new Date(Date.now() + DAY).toISOString() }),
      false,
    );
    assert.equal(
      isSubscriptionExpired({ subscription_expires_at: new Date(Date.now() - DAY).toISOString() }),
      true,
    );
    assert.equal(isSubscriptionExpired({ subscription_expires_at: "not-a-date" }), false);
  });

  test("identityTier: cloud tier honored until expiry, then Core", () => {
    const cloud = { kind: "cloud" };
    // No expiry = operator comp grant → never expires.
    assert.equal(identityTier(cloud, { tier_snapshot: "max" }), "max");
    // Future expiry → tier honored.
    assert.equal(
      identityTier(cloud, { tier_snapshot: "max", subscription_expires_at: new Date(Date.now() + DAY).toISOString() }),
      "max",
    );
    // Past expiry → effectively Core.
    assert.equal(
      identityTier(cloud, { tier_snapshot: "max", subscription_expires_at: new Date(Date.now() - DAY).toISOString() }),
      "core",
    );
  });

  test("identityTier: license path is unaffected by expiry", () => {
    assert.equal(identityTier({ kind: "license", license: { tier: "pro" } }, null), "pro");
  });
});

describe("extendUserTier (prepaid periods)", () => {
  before(async () => {
    await initCredits({ dataDir: mkdtempSync(path.join(tmpdir(), "relay-tier-")) });
  });

  test("first purchase sets the tier + ~periodDays out", async () => {
    const row = await extendUserTier({ userId: "u1", tier: "pro", periodDays: 30 });
    assert.equal(row.tier_snapshot, "pro");
    const days = (new Date(row.subscription_expires_at).getTime() - Date.now()) / DAY;
    assert.ok(days > 29.9 && days < 30.1, `~30 days, got ${days}`);
  });

  test("early renewal EXTENDS from the current expiry (adds time)", async () => {
    const first = await extendUserTier({ userId: "u2", tier: "max", periodDays: 30 });
    const firstExp = new Date(first.subscription_expires_at).getTime();
    const second = await extendUserTier({ userId: "u2", tier: "max", periodDays: 30 });
    const addedDays = (new Date(second.subscription_expires_at).getTime() - firstExp) / DAY;
    assert.ok(addedDays > 29.9 && addedDays < 30.1, `added ~30 days, got ${addedDays}`);
  });

  test("renewing AFTER expiry starts fresh from now", async () => {
    const row = await getUserCreditRow("u3");
    row.tier_snapshot = "pro";
    row.subscription_expires_at = new Date(Date.now() - 5 * DAY).toISOString(); // expired 5d ago
    const renewed = await extendUserTier({ userId: "u3", tier: "pro", periodDays: 30 });
    const days = (new Date(renewed.subscription_expires_at).getTime() - Date.now()) / DAY;
    assert.ok(days > 29.9 && days < 30.1, `fresh ~30 days from now, got ${days}`);
  });

  test("early renewal PRESERVES the monthly credit counter (no free reset)", async () => {
    await extendUserTier({ userId: "u4", tier: "pro", periodDays: 30 });
    const row = await getUserCreditRow("u4");
    row.monthly_consumed = 7; // simulate credits already spent this cycle
    row.monthly_gemini_consumed = 3;
    // Pay early / renew while the subscription is still in force.
    await extendUserTier({ userId: "u4", tier: "pro", periodDays: 30 });
    const after = await getUserCreditRow("u4");
    assert.equal(after.monthly_consumed, 7, "consumed credits must survive an early renewal");
    assert.equal(after.monthly_gemini_consumed, 3);
  });

  test("resubscribing AFTER a lapse starts a fresh cycle (counter reset)", async () => {
    await extendUserTier({ userId: "u5", tier: "pro", periodDays: 30 });
    const row = await getUserCreditRow("u5");
    row.monthly_consumed = 9;
    row.subscription_expires_at = new Date(Date.now() - 5 * DAY).toISOString(); // lapsed
    await extendUserTier({ userId: "u5", tier: "pro", periodDays: 30 });
    const after = await getUserCreditRow("u5");
    assert.equal(after.monthly_consumed, 0, "a lapsed resubscribe starts a clean cycle");
  });
});