/**
 * Task 4: Withdrawal emails to teams
 *
 * Verifies that FINALIST_WITHDRAWN in-app notifications are sent to the team
 * lead when an admin withdraws a team's grand-finale slot via:
 *   - adminDecline  (PENDING → DECLINED)
 *   - unconfirm     (CONFIRMED → SUPERSEDED)
 *   - unenroll      (only when a CONFIRMED confirmation existed; NOT when never enrolled)
 */
import { afterAll, describe, expect, it } from 'vitest'
import { prisma, createCaller } from '../setup'
import {
  createTestUser,
  createTestProgram,
  createTestProject,
  createTestCompetition,
  createTestRound,
  cleanupTestData,
  uid,
} from '../helpers'
import { finalistRouter } from '../../src/server/routers/finalist'

beforeAll(() => {
  process.env.NEXTAUTH_SECRET = 'test-secret-for-finalist-tokens'
  process.env.NEXTAUTH_URL = 'http://localhost:3001'
})

import { beforeAll } from 'vitest'

// ── helpers ────────────────────────────────────────────────────────────────

async function createApplicant(label = 'user') {
  const id = uid(label)
  return prisma.user.create({
    data: {
      id,
      email: `${id}@test.local`,
      name: `Test ${label}`,
      role: 'APPLICANT',
      roles: ['APPLICANT'],
      status: 'ACTIVE',
    },
  })
}

/** Creates a program + competition + round (LIVE_FINAL) + project + team lead,
 *  returns all. Callers can then create a FinalistConfirmation themselves so they
 *  control the initial status. */
async function setupBase(label: string) {
  const program = await createTestProgram({ name: `withdrawal-${label}-${uid()}`, defaultAttendeeCap: 3 })
  const competition = await createTestCompetition(program.id, { status: 'ACTIVE' })
  await createTestRound(competition.id, {
    roundType: 'MENTORING',
    sortOrder: 60,
  })
  const liveFinalRound = await createTestRound(competition.id, {
    roundType: 'LIVE_FINAL',
    sortOrder: 70,
    configJson: { confirmationWindowHours: 24 },
  })
  const project = await createTestProject(program.id, {
    title: `Withdrawal Test ${label}`,
    competitionCategory: 'STARTUP',
  })
  const lead = await createApplicant('lead')
  await prisma.teamMember.create({
    data: { projectId: project.id, userId: lead.id, role: 'LEAD' },
  })
  // Put project in MENTORING round (enrollment candidate)
  await prisma.projectRoundState.create({
    data: {
      projectId: project.id,
      roundId: (
        await prisma.round.findFirstOrThrow({
          where: { competition: { programId: program.id }, roundType: 'MENTORING' },
        })
      ).id,
    },
  })
  return { program, liveFinalRound, project, lead }
}

// ── suite ──────────────────────────────────────────────────────────────────

describe('finalist withdrawal notifications (Task 4)', () => {
  const programIds: string[] = []
  const userIds: string[] = []
  const notificationIds: string[] = []

  afterAll(async () => {
    if (notificationIds.length > 0) {
      await prisma.inAppNotification.deleteMany({ where: { id: { in: notificationIds } } })
    }
    for (const programId of programIds) {
      await prisma.inAppNotification.deleteMany({
        where: { metadata: { path: ['projectTitle'], string_contains: 'Withdrawal Test' } },
      })
      await prisma.attendingMember.deleteMany({
        where: { confirmation: { project: { programId } } },
      })
      await prisma.finalistConfirmation.deleteMany({ where: { project: { programId } } })
      await prisma.waitlistEntry.deleteMany({ where: { programId } })
      await prisma.projectRoundState.deleteMany({
        where: { round: { competition: { programId } } },
      })
      await cleanupTestData(programId, [])
    }
    if (userIds.length > 0) {
      await prisma.user.deleteMany({ where: { id: { in: userIds } } })
    }
  })

  it('Test 1: adminDecline on PENDING sends FINALIST_WITHDRAWN to team lead', async () => {
    const admin = await createTestUser('SUPER_ADMIN')
    userIds.push(admin.id)

    const { program, project, lead } = await setupBase('adminDecline')
    programIds.push(program.id)
    userIds.push(lead.id)

    // Create a PENDING FinalistConfirmation manually
    const confirmation = await prisma.finalistConfirmation.create({
      data: {
        projectId: project.id,
        category: 'STARTUP',
        status: 'PENDING',
        deadline: new Date(Date.now() + 86_400_000),
        token: `tok_${uid()}`,
      },
    })

    // Clear any prior notifications for lead
    await prisma.inAppNotification.deleteMany({ where: { userId: lead.id } })

    const caller = createCaller(finalistRouter, {
      id: admin.id,
      email: admin.email,
      role: 'SUPER_ADMIN',
    })

    await caller.adminDecline({
      confirmationId: confirmation.id,
      reason: 'No longer eligible',
    })

    const notification = await prisma.inAppNotification.findFirst({
      where: { userId: lead.id, type: 'FINALIST_WITHDRAWN' },
    })
    expect(notification, 'lead should have FINALIST_WITHDRAWN notification').not.toBeNull()
    expect(notification?.type).toBe('FINALIST_WITHDRAWN')
    if (notification) notificationIds.push(notification.id)
  })

  it('Test 2: unconfirm (CONFIRMED→SUPERSEDED) sends FINALIST_WITHDRAWN to team lead', async () => {
    const admin = await createTestUser('SUPER_ADMIN')
    userIds.push(admin.id)

    const { program, project, lead } = await setupBase('unconfirm')
    programIds.push(program.id)
    userIds.push(lead.id)

    // Create a CONFIRMED FinalistConfirmation manually
    const confirmation = await prisma.finalistConfirmation.create({
      data: {
        projectId: project.id,
        category: 'STARTUP',
        status: 'CONFIRMED',
        deadline: new Date(Date.now() + 86_400_000),
        token: `tok_${uid()}`,
        confirmedAt: new Date(),
      },
    })

    await prisma.inAppNotification.deleteMany({ where: { userId: lead.id } })

    const caller = createCaller(finalistRouter, {
      id: admin.id,
      email: admin.email,
      role: 'SUPER_ADMIN',
    })

    await caller.unconfirm({
      confirmationId: confirmation.id,
      reason: 'Quota change required — test',
    })

    const notification = await prisma.inAppNotification.findFirst({
      where: { userId: lead.id, type: 'FINALIST_WITHDRAWN' },
    })
    expect(notification, 'lead should have FINALIST_WITHDRAWN notification after unconfirm').not.toBeNull()
    expect(notification?.type).toBe('FINALIST_WITHDRAWN')
    if (notification) notificationIds.push(notification.id)
  })

  it('Test 3: unenroll of CONFIRMED team sends FINALIST_WITHDRAWN to team lead', async () => {
    const admin = await createTestUser('SUPER_ADMIN')
    userIds.push(admin.id)

    const { program, liveFinalRound, project, lead } = await setupBase('unenroll-confirmed')
    programIds.push(program.id)
    userIds.push(lead.id)

    const caller = createCaller(finalistRouter, {
      id: admin.id,
      email: admin.email,
      role: 'SUPER_ADMIN',
    })

    // Enroll via ADMIN_CONFIRM → status = CONFIRMED
    await caller.enrollFinalists({
      programId: program.id,
      roundId: liveFinalRound.id,
      enrollments: [
        {
          projectId: project.id,
          mode: 'ADMIN_CONFIRM',
          attendingUserIds: [lead.id],
          visaFlags: {},
        },
      ],
    })

    // Verify the confirmation is indeed CONFIRMED before we unenroll
    const confBefore = await prisma.finalistConfirmation.findUniqueOrThrow({
      where: { projectId: project.id },
    })
    expect(confBefore.status).toBe('CONFIRMED')

    await prisma.inAppNotification.deleteMany({ where: { userId: lead.id } })

    await caller.unenroll({ projectId: project.id, roundId: liveFinalRound.id })

    const notification = await prisma.inAppNotification.findFirst({
      where: { userId: lead.id, type: 'FINALIST_WITHDRAWN' },
    })
    expect(notification, 'lead should have FINALIST_WITHDRAWN after unenrolling a CONFIRMED team').not.toBeNull()
    expect(notification?.type).toBe('FINALIST_WITHDRAWN')
    if (notification) notificationIds.push(notification.id)
  })

  it('Test 4: unenroll of never-enrolled project does NOT send FINALIST_WITHDRAWN', async () => {
    const admin = await createTestUser('SUPER_ADMIN')
    userIds.push(admin.id)

    const { program, liveFinalRound, project, lead } = await setupBase('unenroll-none')
    programIds.push(program.id)
    userIds.push(lead.id)

    await prisma.inAppNotification.deleteMany({ where: { userId: lead.id } })

    const caller = createCaller(finalistRouter, {
      id: admin.id,
      email: admin.email,
      role: 'SUPER_ADMIN',
    })

    // No prior enrollment — should be a no-op
    await caller.unenroll({ projectId: project.id, roundId: liveFinalRound.id })

    const notification = await prisma.inAppNotification.findFirst({
      where: { userId: lead.id, type: 'FINALIST_WITHDRAWN' },
    })
    expect(notification, 'no FINALIST_WITHDRAWN when project was never enrolled').toBeNull()
  })
})