import { NextRequest, NextResponse } from 'next/server'
import { prisma } from '@/lib/prisma'
import { generateToken, validateRefreshToken, createRefreshToken } from '@/lib/auth'

export async function POST(request: NextRequest) {
  try {
    const body = await request.json()
    const { refreshToken } = body

    if (!refreshToken) {
      return NextResponse.json(
        { error: 'Refresh token is required' },
        { status: 400 }
      )
    }

    // Validate the refresh token
    const user = await validateRefreshToken(refreshToken)
    if (!user) {
      return NextResponse.json(
        { error: 'Invalid or expired refresh token' },
        { status: 401 }
      )
    }

    // Generate new access token
    const accessToken = generateToken({
      userId: user.id,
      email: user.email,
      role: user.role,
    })

    // Generate new refresh token (token rotation)
    const newRefreshToken = await createRefreshToken(user.id)

    // Set the new access token in cookie
    const response = NextResponse.json(
      {
        accessToken,
        refreshToken: newRefreshToken,
        user: {
          id: user.id,
          email: user.email,
          username: user.username,
          role: user.role,
        },
      },
      { status: 200 }
    )

    response.cookies.set('auth-token', accessToken, {
      httpOnly: true,
      secure: process.env.NODE_ENV === 'production',
      sameSite: 'lax',
      maxAge: 60 * 15, // 15 minutes
      path: '/',
    })

    return response
  } catch (error) {
    console.error('Token refresh error:', error)
    return NextResponse.json(
      { error: 'Failed to refresh token' },
      { status: 500 }
    )
  }
}