auth-signup-form.tsx

'use client'

import { Alert } from '@/components/ui/alert'
import { Button } from '@/components/ui/button'
import { Input } from '@/components/ui/input'
import { Label } from '@/components/ui/label'
import { signIn } from 'next-auth/react'
import { useState } from 'react'

export const SignupForm = () => {
    const [email, setEmail] = useState('')
    const [password, setPassword] = useState('')
    const [error, setError] = useState<string | null>(null)

    const onSubmit = async (e: React.FormEvent) => {
        e.preventDefault()

        try {
            const res = await fetch('/api/signup', {
                method: 'POST',
                body: JSON.stringify({
                    email,
                    password
                }),
                headers: {
                    'Content-Type': 'application/json'
                }
            })
            if (res.ok) {
                signIn()
            } else {
                setError((await res.json()).error)
            }
        } catch (error: any) {
            setError(error?.message)
        }
    }

    return (
        <form onSubmit={onSubmit} className="space-y-12 w-full sm:w-[400px]">
            <div className="grid w-full items-center gap-1.5">
                <Label htmlFor="email">Email</Label>
                <Input
                    className="w-full"
                    required
                    value={email}
                    onChange={(e) => setEmail(e.target.value)}
                    id="email"
                    type="email"
                />
            </div>
            <div className="grid w-full items-center gap-1.5">
                <Label htmlFor="password">Password</Label>
                <Input
                    className="w-full"
                    required
                    value={password}
                    onChange={(e) => setPassword(e.target.value)}
                    id="password"
                    type="password"
                />
            </div>
            {error && <Alert>{error}</Alert>}
            <div className="w-full">
                <Button className="w-full" size="lg">
                    Sign up
                </Button>
            </div>
        </form>
    )
}