import test from 'node:test';
import assert from 'node:assert/strict';
import { readFile } from 'node:fs/promises';
import { parse, compileScript } from '@vue/compiler-sfc';
import ts from 'typescript';
import * as vue from 'vue';

const cartSource = await readFile(new URL('../src/stores/cart.ts', import.meta.url), 'utf8');
const formatSource = await readFile(new URL('../src/utils/format.ts', import.meta.url), 'utf8');
const componentSource = await readFile(
  new URL('../src/pages/packages/cart.vue', import.meta.url),
  'utf8',
);
const { descriptor } = parse(componentSource, { filename: 'cart.vue' });
const script = compileScript(descriptor, { id: 'checkout-test' });
function evaluate(source, dependencies) {
  const { outputText } = ts.transpileModule(source, {
    compilerOptions: { target: ts.ScriptTarget.ES2022, module: ts.ModuleKind.CommonJS },
  });
  const exports = {};
  new Function('require', 'exports', outputText)((name) => {
    if (name in dependencies) return dependencies[name];
    if (name.endsWith('.vue')) return {};
    throw new Error('Unexpected dependency: ' + name);
  }, exports);
  return exports;
}
globalThis.uni = { showToast() {}, navigateTo() {}, redirectTo() {}, navigateBack() {} };
const product = () => ({
  id: 1,
  name: '旧套餐',
  sku_id: 1,
  sku_name: '旧规格',
  liters: 18.9,
  buckets: 30,
  price_cents: 69900,
  unit_price_cents: 2330,
  category: null,
  valid_months: null,
  includes_device: null,
});
const quote = (name = '新套餐') => ({
  items: [
    {
      package_id: 1,
      name,
      sku_id: 2,
      quantity: 2,
      buckets: 120,
      unit_price_cents: 69950,
      amount_cents: 139900,
    },
  ],
  amount_cents: 139900,
  discount_cents: 0,
  quote_revision: 'a'.repeat(64),
});
function deferred() {
  let resolve, reject;
  const promise = new Promise((yes, no) => {
    resolve = yes;
    reject = no;
  });
  return { promise, resolve, reject };
}
function fixture() {
  const requests = [];
  const commands = [];
  const session = vue.reactive({ token: 'token', epoch: 0 });
  const format = evaluate(formatSource, {});
  const store = evaluate(cartSource, { vue, '../utils/format': format });
  store.cart.items.push({ product: product(), quantity: 2 });
  const state = evaluate(script.content, {
    vue,
    '@dcloudio/uni-app': { onShow() {} },
    '../../api/client': {
      get: async () => ({}),
      post: () => {
        const pending = deferred();
        requests.push(pending);
        return pending.promise;
      },
    },
    '../../stores/session': {
      session,
      canManageEnterprise: () => true,
      resourcePath: () => '/enterprises/1',
    },
    '../../stores/cart': store,
    '../../utils/format': format,
    '../../composables/useCommand': {
      useCommand: () => ({ busy: false, execute: (payload) => commands.push(payload) }),
    },
  }).default.setup({}, { expose() {} });
  state.address.value = { address: '企业地址' };
  state.agreed.value = true;
  return { state, session, requests, commands, store, format };
}

test('a new server quote refreshes selected price, buckets and SKU without rounding cents', async () => {
  const app = fixture();
  const request = app.state.calculate();
  app.requests[0].resolve(quote());
  await request;
  assert.equal(app.store.cart.items[0].product.name, '新套餐');
  assert.equal(app.store.cart.items[0].product.buckets, 60);
  assert.equal(app.store.cart.items[0].product.price_cents, 69950);
  assert.equal(app.store.cart.items[0].product.liters, null, 'old SKU dimensions are cleared');
  assert.equal(app.format.money(69950), '699.50');
  assert.equal(app.state.canSubmit.value, true);
  app.state.submit();
  assert.equal(app.commands[0].expected_amount_cents, 139900);
  assert.equal(app.commands[0].quote_revision, 'a'.repeat(64));
});

test('requote clears the old price immediately and a failed quote cannot be submitted', async () => {
  const app = fixture();
  app.state.quote.value = quote();
  const request = app.state.calculate();
  assert.equal(app.state.quote.value, null);
  app.state.submit();
  assert.equal(app.commands.length, 0);
  app.requests[0].reject(new Error('套餐已下架'));
  await request;
  assert.equal(app.state.canSubmit.value, false);
  app.state.submit();
  assert.equal(app.commands.length, 0);
});

test('an older quote response cannot overwrite the latest quote', async () => {
  const app = fixture();
  const old = app.state.calculate();
  const latest = app.state.calculate();
  app.requests[1].resolve(quote('最新报价'));
  await latest;
  app.requests[0].resolve(quote('过时报价'));
  await old;
  assert.equal(app.state.quote.value.items[0].name, '最新报价');
  assert.equal(app.store.cart.items[0].product.name, '最新报价');
});

test('identity changes invalidate quote and address and reject a late response', async () => {
  const app = fixture();
  app.state.quote.value = quote();
  const request = app.state.calculate();
  app.session.epoch++;
  assert.equal(app.state.address.value, null);
  assert.equal(app.state.quote.value, null);
  app.requests[0].resolve(quote());
  await request;
  assert.equal(app.state.quote.value, null);
  assert.equal(app.store.cart.items[0].product.name, '旧套餐');
  assert.equal(app.state.canSubmit.value, false);
});

test('removing the final item invalidates a pending quote and incomplete catalog pages preserve selections', async () => {
  const app = fixture();
  app.store.refreshCartProducts([{ ...product(), id: 2 }]);
  assert.equal(app.store.cart.items.length, 1);
  const request = app.state.calculate();
  app.store.clearCart();
  await app.state.calculate();
  app.requests[0].resolve(quote());
  await request;
  assert.equal(app.state.quote.value, null);
  assert.equal(app.state.canSubmit.value, false);
});