import { createPinia, setActivePinia } from 'pinia'
import { readFileSync } from 'node:fs'
import { resolve } from 'node:path'
import { flushPromises, mount } from '@vue/test-utils'
import { createMemoryHistory, createRouter } from 'vue-router'
import { beforeEach, describe, expect, it, vi } from 'vitest'
import { useAccessPreviewStore } from '@/core/access/accessPreview'
import { useAuthStore } from '@/core/auth/auth'
import LoginView from './LoginView.vue'

const loginSource = readFileSync(resolve(process.cwd(), 'src/modules/auth/pages/LoginView.vue'), 'utf8')
const formStub = {
  template: '<form><slot /></form>',
  setup(_: unknown, { expose }: { expose: (exposed: { validate: () => Promise<boolean> }) => void }) {
    expose({ validate: async () => true })
  },
}

function createMemoryStorage(): Storage {
  const values = new Map<string, string>()
  return {
    get length() { return values.size },
    clear: () => values.clear(),
    getItem: (key) => values.get(key) ?? null,
    key: (index) => [...values.keys()][index] ?? null,
    removeItem: (key) => values.delete(key),
    setItem: (key, value) => values.set(key, value),
  }
}

describe('LoginView authentication lifecycle', () => {
  beforeEach(() => {
    vi.stubGlobal('localStorage', createMemoryStorage())
  })

  it('always renders a blank login form without demo credentials or hints', () => {
    expect(loginSource).toContain("account: ''")
    expect(loginSource).toContain("password: ''")
    expect(loginSource).not.toContain('import.meta.env.DEV')
    expect(loginSource).not.toContain('platform_admin')
    expect(loginSource).not.toContain('ChangeMe123!')
    expect(loginSource).not.toContain('demo-tip')
  })

  it('initializes preview access after login and before redirecting', async () => {
    const pinia = createPinia()
    setActivePinia(pinia)
    const auth = useAuthStore()
    const access = useAccessPreviewStore()
    const router = createRouter({
      history: createMemoryHistory(),
      routes: [
        { path: '/login', component: LoginView },
        { path: '/', component: { template: '<p>home</p>' } },
      ],
    })
    await router.push('/login')
    await router.isReady()

    const calls: string[] = []
    vi.spyOn(auth, 'login').mockImplementation(async () => { calls.push('login') })
    vi.spyOn(access, 'initializeAfterLogin').mockImplementation(() => { calls.push('access') })
    vi.spyOn(router, 'replace').mockImplementation(async () => { calls.push('replace') })
    const wrapper = mount(LoginView, {
      global: {
        plugins: [pinia, router],
        stubs: {
          'el-form': formStub,
          'el-form-item': { template: '<label><slot /></label>' },
          'el-input': { props: ['modelValue'], emits: ['update:modelValue'], template: '<input :value="modelValue" @input="$emit(\'update:modelValue\', $event.target.value)" />' },
          'el-button': { emits: ['click'], template: '<button type="button" @click="$emit(\'click\')"><slot /></button>' },
        },
      },
    })

    const inputs = wrapper.findAll('input')
    await inputs[0]!.setValue('test_admin')
    await inputs[1]!.setValue('password')
    await wrapper.get('form').trigger('submit')
    await flushPromises()

    expect(calls).toEqual(['login', 'access', 'replace'])
  })

  it.each([
    ['/customers?page=2', '/customers?page=2'],
    ['/customers/reviews', '/customers/reviews'],
    ['//example.com', '/403'],
    ['https://example.com', '/403'],
    [['/customers', '/orders/first-leg'], '/403'],
    [null, '/403'],
  ])('sanitizes the post-login redirect %j to %s', async (redirect, expected) => {
    const pinia = createPinia()
    setActivePinia(pinia)
    const auth = useAuthStore()
    const router = createRouter({
      history: createMemoryHistory(),
      routes: [
        { path: '/login', component: LoginView },
        { path: '/', component: { template: '<p>home</p>' } },
      ],
    })
    await router.push({ path: '/login', query: { redirect } })
    await router.isReady()
    vi.spyOn(auth, 'login').mockResolvedValue()
    const replace = vi.spyOn(router, 'replace').mockResolvedValue()
    const wrapper = mount(LoginView, {
      global: {
        plugins: [pinia, router],
        stubs: {
          'el-form': formStub,
          'el-form-item': { template: '<label><slot /></label>' },
          'el-input': { props: ['modelValue'], emits: ['update:modelValue'], template: '<input :value="modelValue" @input="$emit(\'update:modelValue\', $event.target.value)" />' },
          'el-button': { emits: ['click'], template: '<button type="button" @click="$emit(\'click\')"><slot /></button>' },
        },
      },
    })

    const inputs = wrapper.findAll('input')
    await inputs[0]!.setValue('test_admin')
    await inputs[1]!.setValue('password')
    await wrapper.get('form').trigger('submit')
    await flushPromises()

    expect(replace).toHaveBeenCalledWith(expected)
  })

  it('preserves the form and reports a recoverable error when login fails', async () => {
    const pinia = createPinia()
    setActivePinia(pinia)
    const auth = useAuthStore()
    const access = useAccessPreviewStore()
    const router = createRouter({
      history: createMemoryHistory(),
      routes: [
        { path: '/login', component: LoginView },
        { path: '/customers', component: { template: '<p>customers</p>' } },
      ],
    })
    await router.push('/login')
    await router.isReady()
    vi.spyOn(auth, 'login').mockRejectedValue(new Error('network unavailable'))
    const initialize = vi.spyOn(access, 'initializeAfterLogin')
    const replace = vi.spyOn(router, 'replace')
    const wrapper = mount(LoginView, {
      global: {
        plugins: [pinia, router],
        stubs: {
          'el-form': formStub,
          'el-form-item': { template: '<label><slot /></label>' },
          'el-input': { props: ['modelValue'], emits: ['update:modelValue'], template: '<input :value="modelValue" @input="$emit(\'update:modelValue\', $event.target.value)" />' },
          'el-button': { emits: ['click'], template: '<button type="button" @click="$emit(\'click\')"><slot /></button>' },
        },
      },
    })

    const inputs = wrapper.findAll('input')
    await inputs[0]!.setValue('test_admin')
    await inputs[1]!.setValue('password')
    await wrapper.get('form').trigger('submit')
    await flushPromises()

    expect(wrapper.get('[role="alert"]').text()).toBe('network unavailable')
    expect(initialize).not.toHaveBeenCalled()
    expect(replace).not.toHaveBeenCalled()
  })
})