import { readFileSync } from 'node:fs'
import { describe, expect, it } from 'vitest'
import { PROXY_ENV_NAMES } from '../packages/util/http-proxy/src/policy.ts'
import { clearAmbientProxyEnv, TEST_PROXY_SETUP_FILE, vitestConfigFiles } from './test-proxy-environment.ts'

describe('ambient proxy environment', () => {
  it('clears every name the policy resolver reads, in both casings', () => {
    const env: NodeJS.ProcessEnv = {
      HTTP_PROXY: 'http://p:1', http_proxy: 'http://p:1',
      HTTPS_PROXY: 'http://p:1', https_proxy: 'http://p:1',
      ALL_PROXY: 'http://p:1', all_proxy: 'http://p:1',
      NO_PROXY: 'example.com', no_proxy: 'example.com',
      NODE_USE_ENV_PROXY: '1',
      PATH: '/usr/bin',
    }
    expect(clearAmbientProxyEnv(env)).toHaveLength(PROXY_ENV_NAMES.length + 1)
    expect(env).toEqual({ PATH: '/usr/bin' })
  })

  it('reports only the names that were set, and touches nothing else', () => {
    const env: NodeJS.ProcessEnv = { all_proxy: 'http://p:1', HOME: '/home/me' }
    expect(clearAmbientProxyEnv(env)).toEqual(['all_proxy'])
    expect(env).toEqual({ HOME: '/home/me' })
  })

  // A runtime assertion that this process is clear would pass either way: importing the module
  // above already ran it. What can actually regress is the wiring — a new Vitest project, or a
  // config that lists only the invariant host — so that is what this pins.
  const declared = vitestConfigFiles()
    .map(config => ({ config, slots: readFileSync(config, 'utf8').match(/setupFiles: \[[^\]]*\]/g) ?? [] }))
    .filter(entry => entry.slots.length > 0)

  it('finds the configurations that declare a setup at all', () => {
    // Guards the discovery itself: a glob that stopped matching would make every case below vacuous.
    expect(declared.map(entry => entry.config)).toEqual([
      'vitest.config.ts', 'vitest.e2e.config.ts', 'vitest.expected.config.ts', 'vitest.snapshot.config.ts',
    ])
  })

  it.each(declared)('$config runs the setup in every setupFiles it declares', ({ slots }) => {
    for (const slot of slots) expect(slot).toContain(TEST_PROXY_SETUP_FILE)
  })
})