ai-chatbot/apps/editor/features/community/components/sign-in-dialog.tsx

'use client'

import Link from 'next/link'
import { Mail, X } from 'lucide-react'
import { useState } from 'react'
import { authClient } from '../lib/auth/client'
import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/primitives/dialog'

interface SignInDialogProps {
  open: boolean
  onOpenChange: (open: boolean) => void
}

function GoogleIcon({ className }: { className?: string }) {
  return (
    <svg className={className} viewBox="0 0 24 24">
      <path
        d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92a5.06 5.06 0 0 1-2.2 3.32v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.1z"
        fill="#4285F4"
      />
      <path
        d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"
        fill="#34A853"
      />
      <path
        d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"
        fill="#FBBC05"
      />
      <path
        d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"
        fill="#EA4335"
      />
    </svg>
  )
}

/**
 * SignInDialog - Authentication dialog with Google OAuth and magic link
 */
const LOGIN_METHOD_LABELS: Record<string, string> = {
  google: 'Google',
  'magic-link': 'email link',
}

export function SignInDialog({ open, onOpenChange }: SignInDialogProps) {
  const [email, setEmail] = useState('')
  const [isLoading, setIsLoading] = useState(false)
  const [isGoogleLoading, setIsGoogleLoading] = useState(false)
  const [error, setError] = useState<string | null>(null)
  const [success, setSuccess] = useState(false)

  const lastMethod = authClient.getLastUsedLoginMethod?.()
  const lastMethodLabel = lastMethod ? LOGIN_METHOD_LABELS[lastMethod] ?? lastMethod : null

  const handleGoogleSignIn = async () => {
    setError(null)
    setIsGoogleLoading(true)
    try {
      await authClient.signIn.social({
        provider: 'google',
        callbackURL: window.location.origin,
      })
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Failed to sign in with Google')
      setIsGoogleLoading(false)
    }
  }

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault()
    setError(null)
    setIsLoading(true)

    try {
      const result = await authClient.signIn.magicLink({
        email,
        callbackURL: window.location.origin,
      })

      if (result.error) {
        setError(result.error.message || 'Failed to send magic link')
      } else {
        setSuccess(true)
        setEmail('')
      }
    } catch (err) {
      setError(err instanceof Error ? err.message : 'An unexpected error occurred')
    } finally {
      setIsLoading(false)
    }
  }

  const handleClose = () => {
    if (!isLoading && !isGoogleLoading) {
      onOpenChange(false)
      setTimeout(() => {
        setEmail('')
        setError(null)
        setSuccess(false)
      }, 200)
    }
  }

  const anyLoading = isLoading || isGoogleLoading

  return (
    <Dialog open={open} onOpenChange={handleClose}>
      <DialogContent className="sm:max-w-[400px]">
        <DialogHeader>
          <DialogTitle>Sign in to Pascal</DialogTitle>
          <button
            className="absolute top-4 right-4 rounded-sm opacity-70 transition-opacity hover:opacity-100 disabled:pointer-events-none"
            disabled={anyLoading}
            onClick={handleClose}
          >
            <X className="h-4 w-4" />
            <span className="sr-only">Close</span>
          </button>
        </DialogHeader>

        {success ? (
          <div className="space-y-4 py-4">
            <div className="flex flex-col items-center gap-4 text-center">
              <div className="flex h-12 w-12 items-center justify-center rounded-full bg-green-100 dark:bg-green-900/20">
                <Mail className="h-6 w-6 text-green-600 dark:text-green-400" />
              </div>
              <div className="space-y-2">
                <h3 className="font-semibold text-lg">Check your email</h3>
                <p className="text-muted-foreground text-sm">
                  We've sent a magic link to <strong>{email}</strong>
                </p>
                <p className="text-muted-foreground text-sm">
                  Click the link in the email to sign in to your account.
                </p>
              </div>
            </div>
            <button
              className="w-full rounded-md border border-input px-4 py-2 text-sm transition-colors hover:bg-accent hover:text-accent-foreground"
              onClick={handleClose}
            >
              Close
            </button>
          </div>
        ) : (
          <div className="space-y-4">
            {lastMethodLabel && (
              <p className="text-center text-muted-foreground text-xs">
                Last signed in with {lastMethodLabel}
              </p>
            )}

            {/* Google Sign-In */}
            <button
              className="flex w-full items-center justify-center gap-2 rounded-md border border-input bg-background px-4 py-2.5 text-sm font-medium transition-colors hover:bg-accent hover:text-accent-foreground disabled:opacity-50"
              disabled={anyLoading}
              onClick={handleGoogleSignIn}
              type="button"
            >
              {isGoogleLoading ? (
                <div className="h-4 w-4 animate-spin rounded-full border-2 border-foreground border-t-transparent" />
              ) : (
                <GoogleIcon className="h-4 w-4" />
              )}
              Continue with Google
            </button>

            {/* Divider */}
            <div className="relative">
              <div className="absolute inset-0 flex items-center">
                <span className="w-full border-t border-border" />
              </div>
              <div className="relative flex justify-center text-xs uppercase">
                <span className="bg-background px-2 text-muted-foreground">or</span>
              </div>
            </div>

            {/* Magic Link Form */}
            <form className="space-y-4" onSubmit={handleSubmit}>
              <div className="space-y-2">
                <label className="font-medium text-sm" htmlFor="email">
                  Email address
                </label>
                <input
                  autoComplete="email"
                  className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50"
                  disabled={anyLoading}
                  id="email"
                  placeholder="you@example.com"
                  required
                  type="email"
                  value={email}
                  onChange={(e) => setEmail(e.target.value)}
                />
              </div>

              {error && (
                <div className="rounded-md border border-destructive/50 bg-destructive/10 p-3 text-destructive text-sm">
                  {error}
                </div>
              )}

              <button
                className="flex w-full items-center justify-center gap-2 rounded-md bg-primary px-4 py-2 text-primary-foreground text-sm transition-colors hover:bg-primary/90 disabled:opacity-50"
                disabled={anyLoading || !email}
                type="submit"
              >
                {isLoading ? (
                  <>
                    <div className="h-4 w-4 animate-spin rounded-full border-2 border-primary-foreground border-t-transparent" />
                    Sending magic link...
                  </>
                ) : (
                  <>
                    <Mail className="h-4 w-4" />
                    Send magic link
                  </>
                )}
              </button>
            </form>

            <p className="text-center text-muted-foreground text-xs">
              By signing in, you agree to our{' '}
              <Link href="/terms" className="underline hover:text-foreground">
                Terms of Service
              </Link>{' '}
              and{' '}
              <Link href="/privacy" className="underline hover:text-foreground">
                Privacy Policy
              </Link>
              .
            </p>
          </div>
        )}
      </DialogContent>
    </Dialog>
  )
}