"use client";

import { Suspense, useState } from "react";
import { useRouter, useSearchParams } from "next/navigation";
import Link from "next/link";
import { Input } from "@/components/ui/input";
import { Button } from "@/components/ui/button";

function SignUpInner() {
    const router = useRouter();
    const sp = useSearchParams();

    const [username, setUsername] = useState("");
    const [email, setEmail] = useState(""); // optional
    const [password, setPassword] = useState("");
    const [submitting, setSubmitting] = useState(false);
    const [err, setErr] = useState<string | null>(null);

    const next = sp.get("next") || "/my/rigs";

    async function onSubmit(e: React.FormEvent<HTMLFormElement>) {
        e.preventDefault();
        setErr(null);
        setSubmitting(true);
        try {
            const res = await fetch("/api/auth/register", {
                method: "POST",
                headers: { "Content-Type": "application/json" },
                body: JSON.stringify({
                    username,
                    email: email || undefined,
                    password,
                }),
            });
            const data = await res.json().catch(() => ({}));
            if (!res.ok) throw new Error(data?.error || "Registration failed");

            router.replace(next);
        } catch (e: any) {
            setErr(e?.message || "Registration failed");
        } finally {
            setSubmitting(false);
        }
    }

    return (
        <div className="min-h-[60vh] flex items-center justify-center px-4">
        <div className="w-full max-w-md space-y-6">
        <div className="text-center space-y-2">
        <h1 className="text-2xl font-bold">Create account</h1>
        <p className="text-sm text-muted-foreground">
        Pick a username and password. Email is optional (recommended for password reset).
        </p>
        </div>

        <form onSubmit={onSubmit} className="space-y-4">
        {err && (
            <div className="text-sm rounded border border-destructive/30 bg-destructive/10 px-3 py-2 text-destructive">
            {err}
            </div>
        )}

        <div className="space-y-2">
        <label className="text-sm font-medium">Username</label>
        <Input
        autoFocus
        autoComplete="username"
        value={username}
        onChange={(e) => setUsername(e.target.value)}
        required
        />
        </div>

        <div className="space-y-2">
        <label className="text-sm font-medium">
        Email <span className="text-muted-foreground font-normal">(optional)</span>
        </label>
        <Input
        type="email"
        autoComplete="email"
        placeholder="you@example.com"
        value={email}
        onChange={(e) => setEmail(e.target.value)}
        />
        <p className="text-xs text-muted-foreground">
        Without an email, we can’t reset your password if you lose it.
        </p>
        </div>

        <div className="space-y-2">
        <label className="text-sm font-medium">Password</label>
        <Input
        type="password"
        autoComplete="new-password"
        value={password}
        onChange={(e) => setPassword(e.target.value)}
        required
        />
        </div>

        <Button type="submit" disabled={submitting} className="w-full">
        {submitting ? "Creating…" : "Create account"}
        </Button>

        <input type="hidden" name="next" value={next} />
        </form>

        <p className="text-sm text-center text-muted-foreground">
        Already have an account?{" "}
        <Link href="/auth/sign-in" className="underline underline-offset-4 hover:opacity-80">
        Sign in
        </Link>
        </p>
        </div>
        </div>
    );
}

export default function SignUpPage() {
    return (
        <Suspense
        fallback={
            <div className="min-h-[60vh] flex items-center justify-center px-4">
            <div className="text-sm text-muted-foreground">Loading…</div>
            </div>
        }
        >
        <SignUpInner />
        </Suspense>
    );
}