import assert from 'node:assert/strict'
import test from 'node:test'
import { coordinateCrossTabRefresh } from './crossTabRefresh.ts'

test('reuses tokens rotated by another browser tab while waiting for the refresh lock', async () => {
  let currentRefreshToken = 'refresh-old'
  let refreshCalls = 0
  const originalNavigator = globalThis.navigator
  Object.defineProperty(globalThis, 'navigator', {
    configurable: true,
    value: {
      locks: {
        async request(_name, callback) {
          currentRefreshToken = 'refresh-new'
          return callback()
        },
      },
    },
  })

  try {
    const result = await coordinateCrossTabRefresh({
      lockName: 'client-refresh',
      observedRefreshToken: 'refresh-old',
      currentRefreshToken: () => currentRefreshToken,
      reuseCurrentSession: async () => 'access-new',
      refresh: async () => {
        refreshCalls += 1
        return 'unexpected'
      },
    })

    assert.equal(result, 'access-new')
    assert.equal(refreshCalls, 0)
  } finally {
    Object.defineProperty(globalThis, 'navigator', { configurable: true, value: originalNavigator })
  }
})

test('refreshes normally when this tab owns the current refresh token', async () => {
  const originalNavigator = globalThis.navigator
  Object.defineProperty(globalThis, 'navigator', {
    configurable: true,
    value: { locks: { request: async (_name, callback) => callback() } },
  })

  try {
    const result = await coordinateCrossTabRefresh({
      lockName: 'client-refresh',
      observedRefreshToken: 'refresh-old',
      currentRefreshToken: () => 'refresh-old',
      reuseCurrentSession: async () => 'unexpected',
      refresh: async (refreshToken) => `access-for-${refreshToken}`,
    })

    assert.equal(result, 'access-for-refresh-old')
  } finally {
    Object.defineProperty(globalThis, 'navigator', { configurable: true, value: originalNavigator })
  }
})

test('does not wait for rotation after the shared session was removed', async () => {
  const originalNavigator = globalThis.navigator
  const refreshError = new Error('session removed')
  Object.defineProperty(globalThis, 'navigator', { configurable: true, value: {} })

  try {
    await assert.rejects(coordinateCrossTabRefresh({
      lockName: 'client-refresh',
      observedRefreshToken: 'refresh-old',
      currentRefreshToken: () => '',
      reuseCurrentSession: async () => 'unexpected',
      refresh: async () => { throw refreshError },
    }), refreshError)
  } finally {
    Object.defineProperty(globalThis, 'navigator', { configurable: true, value: originalNavigator })
  }
})