'use client'

import { createClient } from '@/lib/supabase/client'

export async function registerPasskey(userId: string, displayName: string) {
  const supabase = createClient()

  if (!window.PublicKeyCredential) {
    throw new Error('Passkeys are not supported in your browser')
  }

  try {
    // Get registration options from Supabase
    const { data, error } = await supabase.auth.signInWithEnrollFactors({
      factorType: 'totp',
    })

    if (error) throw error

    // For now, we'll use a simplified approach with browser's WebAuthn API
    // Create a passkey credential
    const credential = await navigator.credentials.create({
      publicKey: {
        challenge: new Uint8Array(32),
        rp: {
          name: 'Cloudrite',
          id: window.location.hostname,
        },
        user: {
          id: new TextEncoder().encode(userId),
          name: userId,
          displayName: displayName,
        },
        pubKeyCredParams: [{ type: 'public-key', alg: -7 }],
        timeout: 60000,
        attestation: 'direct',
      },
    }) as PublicKeyCredential | null

    if (!credential) {
      throw new Error('Failed to create passkey')
    }

    return credential
  } catch (error) {
    console.error('[v0] Passkey registration failed:', error)
    throw error
  }
}

export async function authenticateWithPasskey() {
  if (!window.PublicKeyCredential) {
    throw new Error('Passkeys are not supported in your browser')
  }

  try {
    const assertion = await navigator.credentials.get({
      publicKey: {
        challenge: new Uint8Array(32),
        timeout: 60000,
        userVerification: 'preferred',
      },
    }) as PublicKeyCredential | null

    if (!assertion) {
      throw new Error('Passkey authentication cancelled or failed')
    }

    return assertion
  } catch (error) {
    console.error('[v0] Passkey authentication failed:', error)
    throw error
  }
}

export function isPasskeySupported(): boolean {
  return !!(
    window.PublicKeyCredential &&
    navigator.credentials &&
    navigator.credentials.create &&
    navigator.credentials.get
  )
}