"use client";

import { useState } from "react";
import { useAppDispatch, useAppSelector } from "@/lib/hooks";
import { register } from "@/lib/features/auth/authSlice";
import { useRouter } from "next/navigation";
import { Turnstile } from "nextjs-turnstile";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from "@/components/ui/card";
import { AlertCircle, Loader2 } from "lucide-react";
import Link from "next/link";
import Swal from 'sweetalert2'

import { registerSchema } from "@/lib/schemas/register";

export default function RegisterPage() {
    const [username, setUsername] = useState("");
    const [email, setEmail] = useState("");
    const [password, setPassword] = useState("");
    const [confirmPassword, setConfirmPassword] = useState("");
    const [formErrors, setFormErrors] = useState<Record<string, string>>({});
    const [turnstileToken, setTurnstileToken] = useState<string | null>(null);

    const dispatch = useAppDispatch();
    const { isLoading, error } = useAppSelector((state) => state.auth);
    const router = useRouter();

    const handleSubmit = async (e: React.FormEvent) => {
        e.preventDefault();
        setFormErrors({});

        // Zod Validation
        const result = registerSchema.safeParse({
            username,
            email,
            password,
            confirmPassword
        });

        if (!result.success) {
            const errors: Record<string, string> = {};
            result.error.issues.forEach((issue) => {
                const path = issue.path[0];
                if (typeof path === 'string') {
                    errors[path] = issue.message;
                }
            });
            setFormErrors(errors);
            return;
        }

        if (!turnstileToken) {
            Swal.fire({
                icon: 'error',
                title: 'Hata',
                text: 'Lütfen doğrulamayı tamamlayın (Turnstile).',
            })
            return;
        }

        const dispatchResult = await dispatch(register({ username, email, password }));
        if (register.fulfilled.match(dispatchResult)) {
            Swal.fire({
                position: "center",
                icon: "success",
                title: "Kayıt Başarılı!",
                text: "Lütfen email adresinize gönderilen doğrulama linkine tıklayarak hesabınızı aktif edin.",
                showConfirmButton: true,
                confirmButtonText: "Giriş Yap"
            }).then(() => {
                router.push("/login");
            });
        }
    };

    return (
        <Card className="w-full shadow-lg dark:shadow-slate-800/20">
            <CardHeader>
                <CardTitle className="text-2xl font-bold text-center">Kayıt Ol</CardTitle>
                <CardDescription className="text-center">
                    Yeni bir hesap oluşturun
                </CardDescription>
            </CardHeader>
            <CardContent>
                <form onSubmit={handleSubmit} className="space-y-4">
                    <div className="space-y-2">
                        <Label htmlFor="username">Kullanıcı Adı</Label>
                        <Input
                            id="username"
                            type="text"
                            placeholder="kullaniciadi"
                            value={username}
                            onChange={(e) => setUsername(e.target.value)}
                        // required validation is now handled by Zod manually on submit
                        />
                        {formErrors.username && <p className="text-destructive text-sm">{formErrors.username}</p>}
                    </div>
                    <div className="space-y-2">
                        <Label htmlFor="email">Email</Label>
                        <Input
                            id="email"
                            type="email"
                            placeholder="ornek@email.com"
                            value={email}
                            onChange={(e) => setEmail(e.target.value)}
                        />
                        {formErrors.email && <p className="text-destructive text-sm">{formErrors.email}</p>}
                    </div>
                    <div className="space-y-2">
                        <Label htmlFor="password">Şifre</Label>
                        <Input
                            id="password"
                            type="password"
                            value={password}
                            onChange={(e) => setPassword(e.target.value)}
                        />
                        {formErrors.password && <p className="text-destructive text-sm">{formErrors.password}</p>}
                    </div>
                    <div className="space-y-2">
                        <Label htmlFor="confirmPassword">Şifre Tekrar</Label>
                        <Input
                            id="confirmPassword"
                            type="password"
                            value={confirmPassword}
                            onChange={(e) => setConfirmPassword(e.target.value)}
                        />
                        {formErrors.confirmPassword && <p className="text-destructive text-sm">{formErrors.confirmPassword}</p>}
                    </div>

                    <div className="flex justify-center py-2">
                        <Turnstile
                            siteKey={process.env.NEXT_PUBLIC_TURNSTILE_SITE_KEY || "0x4AAAAAACHzHKvlEwMamxCM"}
                            onSuccess={(token) => setTurnstileToken(token)}
                        />
                    </div>

                    {error && (
                        <div className="flex items-center gap-2 text-sm text-destructive bg-destructive/10 p-3 rounded-md">
                            <AlertCircle className="h-4 w-4" />
                            <span>{error}</span>
                        </div>
                    )}

                    <Button type="submit" className="w-full" disabled={isLoading || !turnstileToken}>
                        {isLoading ? <Loader2 className="mr-2 h-4 w-4 animate-spin" /> : "Kayıt Ol"}
                    </Button>
                </form>
            </CardContent>
            <CardFooter className="flex justify-center">
                <p className="text-sm text-muted-foreground">
                    Zaten hesabınız var mı?{" "}
                    <Link href="/login" className="text-primary hover:underline">
                        Giriş Yap
                    </Link>
                </p>
            </CardFooter>
        </Card>
    );
}