const test = require('node:test');
const assert = require('node:assert/strict');
const fs = require('node:fs');
const path = require('node:path');
const vm = require('node:vm');
const root = path.resolve(__dirname, '..');

function preprocess(source, app) {
  const stack = [true];
  return source.split('\n').filter(line => {
    const directive = line.match(/\/\/\s*#(ifdef|ifndef) (APP-PLUS|H5)/);
    if (directive) {
      const enabled = directive[2] === 'APP-PLUS' ? app === true : app === 'h5';
      stack.push(stack.at(-1) && (directive[1] === 'ifdef' ? enabled : !enabled)); return false;
    }
    if (/\/\/\s*#endif/.test(line)) { stack.pop(); return false; }
    return stack.at(-1);
  }).join('\n');
}
function loadModule(file, context, app = true) {
  const source = preprocess(fs.readFileSync(path.join(root, file), 'utf8'), app)
    .replace(/^import .*;\r?$/gm, '')
    .replace(/export (async function|function)/g, '$1')
    .replace(/export const /g, 'const ')
    .replace(/export default request;/g, '');
  vm.createContext(context);
  vm.runInContext(source, context, { filename: file });
  return context;
}
function uniMock() {
  const storage = new Map([['token', 'test-token'], ['user', { userId: 7 }]]);
  const messages = [];
  return { storage, messages, getStorageSync: k => storage.get(k), setStorageSync: (k,v) => storage.set(k,v),
    removeStorageSync: k => storage.delete(k), showToast: v => messages.push(v.title), $emit() {},
    showLoading() {}, hideLoading() {}, navigateTo() {} };
}
const payment = { orderNum: 'order-1', douyin: { appId: 'app', mchId: 'mch', prepayId: 'prepay',
  packageValue: 'Sign=DYPay', nonceStr: 'nonce', timeStamp: '1780000000', sign: 'sig' } };
async function payContext(overrides = {}, app = true) {
  const adapter = await import('../utils/douyin-pay-adapter.mjs');
  const context = { uni: uniMock(), BASE_URL: 'test-api', TOKEN_NAME: 'token', USER_DATA: 'user',
    ...adapter, canOpenDypay: () => true, initDypay: () => true,
    openDypay: (_, cb) => cb({ resultCode: '0' }),
    request: async () => ({ bizcode: 100, data: { state: 2 } }), ...overrides };
  return loadModule('utils/douyin-pay.js', context, app);
}
test('SDK success is confirmed with server before showing success', async () => {
  let queries = 0;
  const ctx = await payContext({ request: async () => { queries++; return { bizcode:100, data:{state:2} }; } });
  await ctx.appDypayFun(payment);
  assert.equal(queries, 1);
  assert.equal(ctx.uni.messages.at(-1), '支付成功');
  assert.equal(ctx.uni.storage.has('tb-douyin:test-api:7'), false);
});
test('SDK success plus network failure remains recoverable, never success', async () => {
  const ctx = await payContext({ request: async () => { throw new Error('offline'); } });
  await ctx.appDypayFun(payment);
  assert.equal(ctx.uni.storage.get('tb-douyin:test-api:7'), 'order-1');
  assert.equal(ctx.uni.messages.includes('支付成功'), false);
});
test('cancel still queries authoritative server state', async () => {
  const ctx = await payContext({ openDypay: (_, cb) => cb({ resultCode:'1' }) });
  await ctx.appDypayFun(payment);
  assert.equal(ctx.uni.messages.at(-1), '支付成功');
});
test('old backend parameters never invoke native SDK', async () => {
  let calls = 0;
  const ctx = await payContext({ openDypay: () => calls++ });
  await ctx.appDypayFun({ orderNum:'old', douyin:{appId:'app'} });
  assert.equal(calls, 0);
  assert.match(ctx.uni.messages.at(-1), /缺少支付参数/);
});
test('new backend orderInfo (object or JSON) reaches native SDK with exact signed fields', async () => {
  const { toSdkPayInfo } = await import('../utils/douyin-pay-adapter.mjs');
  const expected = toSdkPayInfo(payment);
  for (const orderInfo of [expected, JSON.stringify(expected)]) {
    let received;
    const ctx = await payContext({ openDypay: (options, cb) => { received = options.payInfo; cb({resultCode:'0'}); } });
    const result = await ctx.appDypayFun({orderNum:'order-1', douyin:{type:'app', orderInfo}});
    assert.deepEqual(received, expected);
    assert.equal(result.state, 'paid');
  }
});
test('legacy douyinPayFun calls native bridge, never uni payment provider or URL fallback', async () => {
  let nativeCalls = 0;
  const ctx = await payContext({ openDypay: (_, cb) => { nativeCalls++; cb({resultCode:'0'}); } });
  ctx.uni.requestPayment = () => assert.fail('Must not use built-in payment provider for Douyin');
  ctx.plus = { runtime: { openURL: () => assert.fail('Must not synthesize cashier URLs') } };
  loadModule('utils/payUtils.js', ctx);
  const result = await ctx.douyinPayFun(payment.douyin, 1, payment.orderNum);
  assert.equal(nativeCalls, 1);
  assert.equal(result.state, 'paid');
});
test('invalid JSON and Scheme-only payload do not call SDK or create pending state', async () => {
  for (const douyin of [{orderInfo:'{'}, {orderStr:'snssdk1128://open'}, {type:'h5', prepayId:'prepay'}]) {
    const ctx = await payContext({openDypay: () => assert.fail('Invalid data reached SDK')});
    const result = await ctx.appDypayFun({orderNum:'invalid', douyin});
    assert.equal(result.state, 'error');
    assert.equal(ctx.uni.storage.has('tb-douyin:test-api:7'), false);
  }
});
test('legacy retry of settled order queries state without opening payment again', async () => {
  const ctx = await payContext({openDypay: () => assert.fail('Retry opened payment again')});
  ctx.uni.storage.set('tb-douyin:test-api:7', payment.orderNum);
  const result = await ctx.appDypayFun(payment);
  assert.equal(result.state, 'paid');
});
test('duplicate invocation does not open SDK twice', async () => {
  let done;
  let calls = 0;
  const ctx = await payContext({ openDypay: (_, cb) => { calls++; done = cb; } });
  const first = ctx.appDypayFun(payment);
  await ctx.appDypayFun(payment);
  done({resultCode:'0'});
  await first;
  assert.equal(calls, 1);
});
test('account switch suppresses old account result and retains its pending record', async () => {
  const ctx = await payContext();
  ctx.request = async () => { ctx.uni.storage.set('user', {userId:8}); return {bizcode:100,data:{state:2}}; };
  await ctx.appDypayFun(payment);
  assert.equal(ctx.uni.messages.includes('支付成功'), false);
  assert.equal(ctx.uni.storage.get('tb-douyin:test-api:7'), 'order-1');
});
test('cold start queries saved order; unavailable app does not create order', async () => {
  const ctx = await payContext({ canOpenDypay: () => false });
  assert.equal(await ctx.prepareDouyinPay('douyin'), false);
  ctx.uni.storage.set('tb-douyin:test-api:7', 'pending');
  await ctx.resumeDouyinPay();
  assert.equal(ctx.uni.messages.at(-1), '支付成功');
});
test('non-App excludes Douyin and never accesses native SDK', async () => {
  const ctx = await payContext({}, false);
  assert.equal(ctx.douyinPayTypes('1,2,3'), '1,2,3');
  assert.equal(ctx.filterDouyinPayWays([{type:'douyin'},{type:'wechat'}]).length, 1);
  assert.equal(await ctx.prepareDouyinPay('douyin'), false);
});

test('H5 displays configured Douyin but blocks payment before order creation', async () => {
  const ctx = await payContext({ canOpenDypay: () => { throw new Error('Native SDK must not run'); } }, 'h5');
  assert.equal(ctx.douyinPayTypes('1,2,3'), '1,2,3,6');
  assert.equal(ctx.douyinPayTypes('1,6'), '1,6');
  assert.equal(ctx.filterDouyinPayWays([{type:'douyin'},{type:'wechat'}]).length, 2);
  assert.equal(ctx.filterDouyinPayWays([]).length, 0);
  assert.equal(await ctx.prepareDouyinPay('douyin'), false);
  assert.match(ctx.uni.messages.at(-1), /仅支持/);
});
test('request terminates on HTTP500, business500, bad JSON, auth failure and offline', async () => {
  for (const response of [{statusCode:500,data:{}}, {statusCode:200,data:{status:500}},
    {statusCode:200,data:'<html>'}, {statusCode:200,data:{bizcode:201,errcode:999}}, null]) {
    const uni = uniMock();
    uni.request = options => response ? options.success(response) : options.fail(new Error('offline'));
    const ctx = loadModule('utils/request.js', { uni, TOKEN_NAME:'token', USER_DATA:'user',
      getStorageFun: () => '', BASE_URL:'test-api', Authorization:'test-only', console:{log(){}}, setTimeout, clearTimeout });
    await assert.rejects(ctx.request({url:'/payment/queryResult'}));
  }
});