import { describe, it, expect, mock, beforeEach } from 'bun:test'
import { getSession } from '@/lib/auth-simple'

// Mock next/headers
mock.module('next/headers', () => ({
  cookies: mock(() => Promise.resolve({
    get: mock(() => ({ name: 'better-auth.session_token', value: 'test-token' })),
  })),
  headers: mock(() => Promise.resolve({
    get: mock(() => null),
  })),
}))

// Mock fetch
const mockFetch = mock(async () => new Response())
global.fetch = mockFetch as any

describe('getSession', () => {
  beforeEach(() => {
    mock.clearAllMocks()
  })

  it('returns session data when auth API returns 200', async () => {
    const mockSession = {
      session: { token: 'test-token', expiresAt: new Date().toISOString() },
      user: { id: 'user-123', email: 'test@example.com' },
    }

    mockFetch.mockImplementation(async () => 
      new Response(JSON.stringify(mockSession), { status: 200 })
    )

    const result = await getSession()

    expect(result).toEqual(mockSession)
    expect(mockFetch).toHaveBeenCalled()
  })

  it('returns null when auth API returns non-200 status', async () => {
    mockFetch.mockImplementation(async () => 
      new Response(null, { status: 401 })
    )

    const result = await getSession()

    expect(result).toBeNull()
  })

  it('returns null when an error occurs', async () => {
    mockFetch.mockRejectedValue(new Error('Network error'))

    const result = await getSession()

    expect(result).toBeNull()
  })
})