import { afterAll, beforeAll, beforeEach, describe, expect, it, vi } from 'vitest'
import { prisma, createCaller } from '../setup'
import { createTestUser, createTestProgram, cleanupTestData, uid } from '../helpers'

vi.mock('@/lib/email', async () => {
  const actual = await vi.importActual<typeof import('@/lib/email')>('@/lib/email')
  return {
    ...actual,
    sendExternalDishInviteEmail: vi.fn(async () => undefined),
  }
})

import { lunchRouter } from '@/server/routers/lunch'
import { signExternalLunchToken } from '@/lib/external-lunch-token'

const programIds: string[] = []
const userIds: string[] = []

beforeAll(() => {
  process.env.NEXTAUTH_SECRET = 'test-secret-for-external-lunch-tokens'
})

beforeEach(() => {
  vi.clearAllMocks()
})

afterAll(async () => {
  for (const programId of programIds) {
    await prisma.externalAttendee.deleteMany({ where: { lunchEvent: { programId } } })
    await prisma.dish.deleteMany({ where: { lunchEvent: { programId } } })
    await prisma.lunchEvent.deleteMany({ where: { programId } })
    await cleanupTestData(programId, [])
  }
  if (userIds.length > 0) {
    await prisma.auditLog.deleteMany({ where: { userId: { in: userIds } } })
    await prisma.user.deleteMany({ where: { id: { in: userIds } } })
  }
})

async function newAdminCaller() {
  const admin = await createTestUser('SUPER_ADMIN')
  userIds.push(admin.id)
  return createCaller(lunchRouter, { id: admin.id, email: admin.email, role: 'SUPER_ADMIN' })
}

function publicCaller() {
  return lunchRouter.createCaller({
    session: null,
    prisma,
    ip: '127.0.0.1',
    userAgent: 'vitest',
  })
}

async function setupEvent(opts: { eventAt?: Date | null; changeCutoffHours?: number } = {}) {
  const program = await createTestProgram({ name: `xpick-${uid()}` })
  programIds.push(program.id)
  const event = await prisma.lunchEvent.create({
    data: {
      programId: program.id,
      enabled: true,
      eventAt: opts.eventAt ?? new Date(Date.now() + 30 * 86_400_000),
      venue: 'La Terrasse',
      changeCutoffHours: opts.changeCutoffHours ?? 48,
    },
  })
  const dish = await prisma.dish.create({
    data: { lunchEventId: event.id, name: `Risotto-${uid()}`, dietaryTags: ['VEGETARIAN'] },
  })
  return { program, event, dish }
}

describe('lunch.createExternal auto-invite', () => {
  it('sends a dish invite and stamps inviteSentAt when an email is present', async () => {
    const { event } = await setupEvent()
    const caller = await newAdminCaller()
    const ext = await caller.createExternal({
      lunchEventId: event.id,
      name: 'Marine',
      email: `marine-${uid()}@example.org`,
    })
    const { sendExternalDishInviteEmail } = await import('@/lib/email')
    expect(sendExternalDishInviteEmail).toHaveBeenCalledTimes(1)
    const row = await prisma.externalAttendee.findUnique({ where: { id: ext.id } })
    expect(row?.inviteSentAt).not.toBeNull()
  })

  it('does not send or stamp when no email is present', async () => {
    const { event } = await setupEvent()
    const caller = await newAdminCaller()
    const ext = await caller.createExternal({ lunchEventId: event.id, name: 'No Email' })
    const { sendExternalDishInviteEmail } = await import('@/lib/email')
    expect(sendExternalDishInviteEmail).not.toHaveBeenCalled()
    const row = await prisma.externalAttendee.findUnique({ where: { id: ext.id } })
    expect(row?.inviteSentAt).toBeNull()
  })
})

describe('lunch.getExternalByToken', () => {
  it('returns the external, event, and dishes for a valid token', async () => {
    const { event, dish } = await setupEvent()
    const ext = await prisma.externalAttendee.create({
      data: { lunchEventId: event.id, name: 'Guest', email: `g-${uid()}@x.test` },
    })
    const token = signExternalLunchToken({
      externalId: ext.id,
      exp: Math.floor(Date.now() / 1000) + 86_400,
    })
    const res = await publicCaller().getExternalByToken({ token })
    expect(res.external.id).toBe(ext.id)
    expect(res.external.name).toBe('Guest')
    expect(res.event.venue).toBe('La Terrasse')
    expect(res.dishes.map((d) => d.id)).toContain(dish.id)
    expect(res.changeDeadline).toBeInstanceOf(Date)
  })

  it('rejects a tampered token', async () => {
    const { event } = await setupEvent()
    const ext = await prisma.externalAttendee.create({
      data: { lunchEventId: event.id, name: 'Guest', email: `g-${uid()}@x.test` },
    })
    const token = signExternalLunchToken({
      externalId: ext.id,
      exp: Math.floor(Date.now() / 1000) + 86_400,
    })
    await expect(
      publicCaller().getExternalByToken({ token: token.slice(0, -2) + 'xx' }),
    ).rejects.toThrow(/signature/i)
  })
})

describe('lunch.setExternalPick', () => {
  it('sets the dish before the deadline', async () => {
    const { event, dish } = await setupEvent()
    const ext = await prisma.externalAttendee.create({
      data: { lunchEventId: event.id, name: 'Guest', email: `g-${uid()}@x.test` },
    })
    const token = signExternalLunchToken({
      externalId: ext.id,
      exp: Math.floor(Date.now() / 1000) + 86_400,
    })
    await publicCaller().setExternalPick({
      token,
      dishId: dish.id,
      allergens: ['GLUTEN'],
      allergenOther: 'wine',
    })
    const row = await prisma.externalAttendee.findUnique({ where: { id: ext.id } })
    expect(row?.dishId).toBe(dish.id)
    expect(row?.allergens).toEqual(['GLUTEN'])
    expect(row?.allergenOther).toBe('wine')
  })

  it('rejects a pick after the change deadline', async () => {
    // eventAt 1h out, 24h cutoff → deadline is in the past
    const { event, dish } = await setupEvent({
      eventAt: new Date(Date.now() + 3_600_000),
      changeCutoffHours: 24,
    })
    const ext = await prisma.externalAttendee.create({
      data: { lunchEventId: event.id, name: 'Guest', email: `g-${uid()}@x.test` },
    })
    const token = signExternalLunchToken({
      externalId: ext.id,
      exp: Math.floor(Date.now() / 1000) + 86_400,
    })
    await expect(
      publicCaller().setExternalPick({
        token,
        dishId: dish.id,
        allergens: [],
        allergenOther: null,
      }),
    ).rejects.toThrow(/deadline/i)
  })
})

describe('lunch.sendExternalInvite', () => {
  it('sends and stamps inviteSentAt for an emailed external', async () => {
    const { event } = await setupEvent()
    const caller = await newAdminCaller()
    const ext = await prisma.externalAttendee.create({
      data: { lunchEventId: event.id, name: 'Guest', email: `g-${uid()}@x.test` },
    })
    await caller.sendExternalInvite({ externalId: ext.id })
    const { sendExternalDishInviteEmail } = await import('@/lib/email')
    expect(sendExternalDishInviteEmail).toHaveBeenCalledTimes(1)
    const row = await prisma.externalAttendee.findUnique({ where: { id: ext.id } })
    expect(row?.inviteSentAt).not.toBeNull()
  })

  it('rejects when the external has no email', async () => {
    const { event } = await setupEvent()
    const caller = await newAdminCaller()
    const ext = await prisma.externalAttendee.create({
      data: { lunchEventId: event.id, name: 'No Email' },
    })
    await expect(caller.sendExternalInvite({ externalId: ext.id })).rejects.toThrow(/email/i)
  })
})