import { describe, it, expect, vi, beforeEach } from 'vitest'

vi.mock('next/cache', () => ({ revalidatePath: vi.fn() }))
vi.mock('next/headers', () => ({ cookies: vi.fn().mockResolvedValue({}) }))
vi.mock('iron-session', () => ({
  getIronSession: vi.fn().mockResolvedValue({ userId: 'user-1', isDemo: false }),
}))
vi.mock('@/lib/session', () => ({
  sessionOptions: { cookieName: 'test', password: 'test' },
}))
vi.mock('@/lib/product-access', () => ({
  productAccessFilter: vi.fn().mockReturnValue({}),
}))
vi.mock('@/lib/prisma', () => ({
  prisma: {
    task: {
      findFirst: vi.fn(),
      create: vi.fn(),
      update: vi.fn(),
      delete: vi.fn(),
      findMany: vi.fn(),
    },
    story: {
      findFirst: vi.fn(),
      findUniqueOrThrow: vi.fn(),
      update: vi.fn(),
    },
    $transaction: vi.fn(),
  },
}))

import { prisma } from '@/lib/prisma'
import { getIronSession } from 'iron-session'
import { saveTask, deleteTask } from '@/actions/tasks'

const mockPrisma = prisma as unknown as {
  task: {
    findFirst: ReturnType<typeof vi.fn>
    create: ReturnType<typeof vi.fn>
    update: ReturnType<typeof vi.fn>
    delete: ReturnType<typeof vi.fn>
    findMany: ReturnType<typeof vi.fn>
  }
  story: {
    findFirst: ReturnType<typeof vi.fn>
    findUniqueOrThrow: ReturnType<typeof vi.fn>
    update: ReturnType<typeof vi.fn>
  }
  $transaction: ReturnType<typeof vi.fn>
}
const mockSession = getIronSession as ReturnType<typeof vi.fn>

const VALID_INPUT = {
  title: 'Test taak',
  description: 'Beschrijving',
  implementation_plan: 'Plan',
  priority: 3,
}

const TASK = {
  id: 'task-1',
  title: 'Test taak',
  status: 'TO_DO',
}

const STORY = { sprint_id: 'sprint-1' }

beforeEach(() => {
  vi.clearAllMocks()
  mockSession.mockResolvedValue({ userId: 'user-1', isDemo: false })
  // Pass-through transaction so saveTask's $transaction wrapper executes its callback inline.
  mockPrisma.$transaction.mockImplementation(async (run: (tx: typeof prisma) => Promise<unknown>) => {
    return run(prisma)
  })
})

// ─── saveTask ────────────────────────────────────────────────────────────────

describe('saveTask — demo-readonly (laag 2)', () => {
  it('blokkeert demo-sessie', async () => {
    mockSession.mockResolvedValue({ userId: 'user-1', isDemo: true })
    const result = await saveTask(VALID_INPUT, { productId: 'p-1' })
    expect(result).toEqual({ ok: false, code: 403, error: 'demo_readonly' })
  })
})

describe('saveTask — unauthenticated', () => {
  it('blokkeert niet-ingelogde gebruiker', async () => {
    mockSession.mockResolvedValue({ userId: undefined, isDemo: false })
    const result = await saveTask(VALID_INPUT, { productId: 'p-1' })
    expect(result).toEqual({ ok: false, code: 403, error: 'forbidden' })
  })
})

describe('saveTask — validatie', () => {
  it('retourneert 422 bij lege titel', async () => {
    const result = await saveTask({ ...VALID_INPUT, title: '' }, { productId: 'p-1', storyId: 's-1' })
    expect(result).toMatchObject({ ok: false, code: 422, error: 'validation' })
  })

  it('retourneert 422 bij te lange titel (>120 tekens)', async () => {
    const result = await saveTask(
      { ...VALID_INPUT, title: 'a'.repeat(121) },
      { productId: 'p-1', storyId: 's-1' },
    )
    expect(result).toMatchObject({ ok: false, code: 422, error: 'validation' })
  })
})

describe('saveTask — edit (cross-tenant scope)', () => {
  it('retourneert forbidden als task buiten scope valt', async () => {
    mockPrisma.task.findFirst.mockResolvedValue(null) // out-of-scope
    const result = await saveTask(VALID_INPUT, { taskId: 'task-1', productId: 'p-1' })
    expect(result).toEqual({ ok: false, code: 403, error: 'forbidden' })
  })

  it('update slaagt voor een geautoriseerde task', async () => {
    mockPrisma.task.findFirst.mockResolvedValue(TASK)
    mockPrisma.task.update.mockResolvedValue(TASK)
    const result = await saveTask(VALID_INPUT, { taskId: 'task-1', productId: 'p-1' })
    expect(result).toMatchObject({ ok: true })
    // scope-filter is toegepast: findFirst bevat `story.product`
    expect(mockPrisma.task.findFirst).toHaveBeenCalledWith(
      expect.objectContaining({
        where: expect.objectContaining({ id: 'task-1', story: expect.anything() }),
      }),
    )
  })
})

describe('saveTask — edit met status-promotie', () => {
  it('promotes story naar DONE wanneer status flip naar DONE alle siblings DONE maakt', async () => {
    mockPrisma.task.findFirst.mockResolvedValue({ id: 'task-1', status: 'IN_PROGRESS' })
    mockPrisma.task.update.mockResolvedValue({
      id: 'task-1',
      title: 'Test taak',
      status: 'IN_PROGRESS',
      story_id: 'story-1',
      implementation_plan: null,
    })
    // Wanneer de helper draait, gebruikt-ie tx.task.update voor de status-flip.
    // Dezelfde mock vangt beide updates op; tweede return-value voor de status-update.
    mockPrisma.task.update.mockResolvedValueOnce({
      id: 'task-1',
      title: 'Test taak',
      status: 'IN_PROGRESS',
      story_id: 'story-1',
      implementation_plan: null,
    }).mockResolvedValueOnce({
      id: 'task-1',
      title: 'Test taak',
      status: 'DONE',
      story_id: 'story-1',
      implementation_plan: null,
    })
    mockPrisma.task.findMany.mockResolvedValue([{ status: 'DONE' }, { status: 'DONE' }])
    mockPrisma.story.findUniqueOrThrow.mockResolvedValue({ status: 'IN_SPRINT' })

    const result = await saveTask(
      { ...VALID_INPUT, status: 'DONE' },
      { taskId: 'task-1', productId: 'p-1' },
    )

    expect(result).toMatchObject({ ok: true })
    expect(mockPrisma.story.update).toHaveBeenCalledWith({
      where: { id: 'story-1' },
      data: { status: 'DONE' },
    })
  })
})

describe('saveTask — create (cross-tenant scope)', () => {
  it('retourneert forbidden als story buiten scope valt', async () => {
    mockPrisma.story.findFirst.mockResolvedValue(null)
    const result = await saveTask(VALID_INPUT, { storyId: 's-1', productId: 'p-1' })
    expect(result).toEqual({ ok: false, code: 403, error: 'forbidden' })
  })

  it('aanmaken slaagt voor een geautoriseerde story', async () => {
    mockPrisma.story.findFirst.mockResolvedValue(STORY)
    mockPrisma.task.findFirst.mockResolvedValue(null) // geen vorige taak
    mockPrisma.task.create.mockResolvedValue(TASK)
    const result = await saveTask(VALID_INPUT, { storyId: 's-1', productId: 'p-1' })
    expect(result).toMatchObject({ ok: true })
  })
})

// ─── deleteTask ──────────────────────────────────────────────────────────────

describe('deleteTask — demo-readonly (laag 2)', () => {
  it('blokkeert demo-sessie', async () => {
    mockSession.mockResolvedValue({ userId: 'user-1', isDemo: true })
    const result = await deleteTask('task-1', { productId: 'p-1' })
    expect(result).toEqual({ ok: false, code: 403, error: 'demo_readonly' })
  })
})

describe('deleteTask — unauthenticated', () => {
  it('blokkeert niet-ingelogde gebruiker', async () => {
    mockSession.mockResolvedValue({ userId: undefined, isDemo: false })
    const result = await deleteTask('task-1', { productId: 'p-1' })
    expect(result).toEqual({ ok: false, code: 403, error: 'forbidden' })
  })
})

describe('deleteTask — cross-tenant scope', () => {
  it('retourneert forbidden als task buiten scope valt', async () => {
    mockPrisma.task.findFirst.mockResolvedValue(null)
    const result = await deleteTask('task-1', { productId: 'p-1' })
    expect(result).toEqual({ ok: false, code: 403, error: 'forbidden' })
  })

  it('verwijderen slaagt voor een geautoriseerde task', async () => {
    mockPrisma.task.findFirst.mockResolvedValue(TASK)
    mockPrisma.task.delete.mockResolvedValue(TASK)
    const result = await deleteTask('task-1', { productId: 'p-1' })
    expect(result).toEqual({ ok: true })
    // scope-filter toegepast
    expect(mockPrisma.task.findFirst).toHaveBeenCalledWith(
      expect.objectContaining({
        where: expect.objectContaining({ id: 'task-1', story: expect.anything() }),
      }),
    )
  })
})