import { describe, it, expect, beforeEach, vi } from 'vitest'
import { NextRequest } from 'next/server'
import { hash } from 'bcryptjs'

// Mock getServerSession
const mockGetServerSession = vi.fn()
vi.mock('next-auth', () => ({
  getServerSession: () => mockGetServerSession(),
}))

// Mock database
const mockDb = {
  company: {
    findMany: vi.fn(),
    count: vi.fn(),
    create: vi.fn(),
    findUnique: vi.fn(),
    update: vi.fn(),
  },
  user: {
    count: vi.fn(),
    create: vi.fn(),
  },
  session: {
    count: vi.fn(),
  },
}

vi.mock('../../lib/db', () => ({
  db: mockDb,
}))

// Mock bcryptjs
vi.mock('bcryptjs', () => ({
  hash: vi.fn(() => 'hashed_password'),
}))

describe('Platform API Endpoints', () => {
  beforeEach(() => {
    vi.clearAllMocks()
  })

  describe('Authentication Requirements', () => {
    it('should require platform authentication', async () => {
      mockGetServerSession.mockResolvedValue(null)

      // Test that endpoints check for authentication
      const endpoints = [
        '/api/platform/companies',
        '/api/platform/companies/123',
      ]

      endpoints.forEach(endpoint => {
        expect(endpoint).toMatch(/^\/api\/platform\//)
      })
    })

    it('should require platform user flag', () => {
      const regularUserSession = {
        user: {
          email: 'regular@user.com',
          isPlatformUser: false,
        },
        expires: new Date().toISOString(),
      }

      const platformUserSession = {
        user: {
          email: 'admin@notso.ai',
          isPlatformUser: true,
          platformRole: 'SUPER_ADMIN',
        },
        expires: new Date().toISOString(),
      }

      expect(regularUserSession.user.isPlatformUser).toBe(false)
      expect(platformUserSession.user.isPlatformUser).toBe(true)
    })
  })

  describe('Company Management', () => {
    it('should return companies list structure', async () => {
      const mockCompanies = [
        {
          id: '1',
          name: 'Company A',
          status: 'ACTIVE',
          createdAt: new Date(),
          _count: { users: 5 },
        },
        {
          id: '2',
          name: 'Company B',
          status: 'SUSPENDED',
          createdAt: new Date(),
          _count: { users: 3 },
        },
      ]

      mockDb.company.findMany.mockResolvedValue(mockCompanies)
      mockDb.company.count.mockResolvedValue(2)
      mockDb.user.count.mockResolvedValue(8)
      mockDb.session.count.mockResolvedValue(150)

      const result = await mockDb.company.findMany({
        include: {
          _count: {
            select: { users: true },
          },
        },
        orderBy: { createdAt: 'desc' },
      })

      expect(result).toHaveLength(2)
      expect(result[0]).toHaveProperty('name')
      expect(result[0]).toHaveProperty('status')
      expect(result[0]._count).toHaveProperty('users')
    })

    it('should create company with admin user', async () => {
      const newCompany = {
        id: '123',
        name: 'New Company',
        email: 'admin@newcompany.com',
        status: 'ACTIVE',
        maxUsers: 10,
        createdAt: new Date(),
        updatedAt: new Date(),
      }

      const newUser = {
        id: '456',
        email: 'admin@newcompany.com',
        name: 'Admin User',
        hashedPassword: 'hashed_password',
        role: 'ADMIN',
        companyId: '123',
        createdAt: new Date(),
        updatedAt: new Date(),
        invitedBy: null,
        invitedAt: null,
      }

      mockDb.company.create.mockResolvedValue({
        ...newCompany,
        users: [newUser],
      })

      const result = await mockDb.company.create({
        data: {
          name: 'New Company',
          email: 'admin@newcompany.com',
          users: {
            create: {
              email: 'admin@newcompany.com',
              name: 'Admin User',
              hashedPassword: 'hashed_password',
              role: 'ADMIN',
            },
          },
        },
        include: { users: true },
      })

      expect(result.name).toBe('New Company')
      expect(result.users).toHaveLength(1)
      expect(result.users[0].email).toBe('admin@newcompany.com')
      expect(result.users[0].role).toBe('ADMIN')
    })

    it('should update company status', async () => {
      const updatedCompany = {
        id: '123',
        name: 'Test Company',
        status: 'SUSPENDED',
        createdAt: new Date(),
        updatedAt: new Date(),
      }

      mockDb.company.update.mockResolvedValue(updatedCompany)

      const result = await mockDb.company.update({
        where: { id: '123' },
        data: { status: 'SUSPENDED' },
      })

      expect(result.status).toBe('SUSPENDED')
    })
  })

  describe('Role-Based Access Control', () => {
    it('should enforce role permissions', () => {
      const permissions = {
        SUPER_ADMIN: {
          canCreateCompany: true,
          canUpdateCompany: true,
          canDeleteCompany: true,
          canViewAllData: true,
        },
        ADMIN: {
          canCreateCompany: false,
          canUpdateCompany: false,
          canDeleteCompany: false,
          canViewAllData: true,
        },
        SUPPORT: {
          canCreateCompany: false,
          canUpdateCompany: false,
          canDeleteCompany: false,
          canViewAllData: true,
        },
      }

      Object.entries(permissions).forEach(([role, perms]) => {
        if (role === 'SUPER_ADMIN') {
          expect(perms.canCreateCompany).toBe(true)
          expect(perms.canUpdateCompany).toBe(true)
        } else {
          expect(perms.canCreateCompany).toBe(false)
          expect(perms.canUpdateCompany).toBe(false)
        }
      })
    })
  })

  describe('Error Handling', () => {
    it('should handle missing required fields', () => {
      const invalidPayloads = [
        { name: 'Company' }, // Missing admin fields
        { adminEmail: 'admin@test.com' }, // Missing company name
        { name: '', adminEmail: 'admin@test.com' }, // Empty name
      ]

      invalidPayloads.forEach(payload => {
        const isValid = payload.name && payload.adminEmail
        expect(isValid).toBeFalsy()
      })
    })

    it('should handle database errors', async () => {
      mockDb.company.findUnique.mockRejectedValue(new Error('Database error'))

      try {
        await mockDb.company.findUnique({ where: { id: '123' } })
      } catch (error) {
        expect(error).toBeInstanceOf(Error)
        expect((error as Error).message).toBe('Database error')
      }
    })
  })
})