import { describe, it, expect, beforeEach } from 'vitest'
import { setActivePinia, createPinia } from 'pinia'
import router from '@/router'

describe('Router', () => {
  beforeEach(() => {
    setActivePinia(createPinia())
    localStorage.clear()
  })

  it('resolves / to HomePage', async () => {
    await router.push('/')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('home')
  })

  it('resolves /registrera to RegisterPage', async () => {
    await router.push('/registrera')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('register')
  })

  it('resolves /logga-in to LoginPage', async () => {
    await router.push('/logga-in')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('login')
  })

  it('resolves /glomt-losenord to ForgotPasswordPage', async () => {
    await router.push('/glomt-losenord')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('forgot-password')
  })

  it('resolves /integritetspolicy to PrivacyPolicyPage', async () => {
    await router.push('/integritetspolicy')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('privacy')
  })

  it('resolves /villkor to TermsOfServicePage', async () => {
    await router.push('/villkor')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('terms')
  })

  it('resolves /aterstall-losenord to ResetPasswordPage', async () => {
    await router.push('/aterstall-losenord?token=abc')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('reset-password')
  })

  it('resolves /orders to OrdersPage', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/orders')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('orders')
  })

  it('resolves /andra-losenord to ChangePasswordPage when authenticated', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/andra-losenord')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('change-password')
  })

  it('resolves /admin to AdminPage for admin user', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'admin' }))
    await router.push('/admin')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('admin')
  })

  it('does not crash on unknown route', async () => {
    await router.push('/nonexistent')
    await router.isReady()
    expect(router.currentRoute.value.matched.length).toBe(0)
  })
})

describe('Router guards', () => {
  beforeEach(() => {
    setActivePinia(createPinia())
    localStorage.clear()
  })

  it('redirects unauthenticated user from /compose to /logga-in', async () => {
    await router.push('/compose')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('login')
    expect(router.currentRoute.value.query.redirect).toBe('/compose')
  })

  it('redirects unauthenticated user from /orders to /logga-in', async () => {
    await router.push('/orders')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('login')
    expect(router.currentRoute.value.query.redirect).toBe('/orders')
  })

  it('redirects unauthenticated user from /andra-losenord to /logga-in', async () => {
    await router.push('/andra-losenord')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('login')
    expect(router.currentRoute.value.query.redirect).toBe('/andra-losenord')
  })

  it('redirects unauthenticated user from /admin to /logga-in', async () => {
    await router.push('/admin')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('login')
    expect(router.currentRoute.value.query.redirect).toBe('/admin')
  })

  it('allows authenticated user to access /compose', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/compose')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('compose')
  })

  it('allows authenticated user to access /orders', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/orders')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('orders')
  })

  it('redirects authenticated user from /logga-in to home', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/logga-in')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('home')
  })

  it('redirects authenticated user from /registrera to home', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/registrera')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('home')
  })

  it('redirects authenticated user from /glomt-losenord to home', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/glomt-losenord')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('home')
  })

  it('redirects authenticated user from /aterstall-losenord to home', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/aterstall-losenord?token=abc')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('home')
  })

  it('allows unauthenticated user to access reset password with token', async () => {
    await router.push('/aterstall-losenord?token=abc')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('reset-password')
  })

  it('redirects non-admin user from /admin to home', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'user' }))
    await router.push('/admin')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('home')
  })

  it('allows admin user to access /admin', async () => {
    localStorage.setItem('auth_token', makeJwt({ role: 'admin' }))
    await router.push('/admin')
    await router.isReady()
    expect(router.currentRoute.value.name).toBe('admin')
  })
})

function makeJwt(payload: Record<string, unknown>): string {
  const header = btoa(JSON.stringify({ alg: 'HS256', typ: 'JWT' }))
  const body = btoa(JSON.stringify(payload))
  const signature = 'test-sig'
  return `${header}.${body}.${signature}`
}