"use client"

import { useState } from "react"
import { useForm } from "react-hook-form"
import { zodResolver } from "@hookform/resolvers/zod"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Textarea } from "@/components/ui/textarea"
import { Card, CardContent } from "@/components/ui/card"
import { Loader2, CheckCircle } from "lucide-react"
import { contactFormSchema, ContactFormValues } from "@/lib/schemas"
import { submitContactForm } from "@/lib/actions/contact"
import { toast } from "sonner"

export function ContactForm() {
    const [isSubmitting, setIsSubmitting] = useState(false)
    const [isSuccess, setIsSuccess] = useState(false)

    const form = useForm<ContactFormValues>({
        resolver: zodResolver(contactFormSchema),
        defaultValues: {
            name: "",
            surname: "",
            email: "",
            phone: "",
            subject: "",
            message: "",
        },
    })

    async function onSubmit(data: ContactFormValues) {
        setIsSubmitting(true)
        try {
            const response = await submitContactForm(data)
            if (response.success) {
                setIsSuccess(true)
                form.reset()
                toast.success("Mesajınız başarıyla gönderildi.")
            } else {
                toast.error("Hata: " + response.error)
            }
        } catch {
            toast.error("Bir hata oluştu.")
        } finally {
            setIsSubmitting(false)
        }
    }

    return (
        <Card>
            <CardContent className="p-6 sm:p-8">
                {isSuccess ? (
                    <div className="flex flex-col items-center justify-center h-full min-h-[400px] text-center space-y-4">
                        <CheckCircle className="w-16 h-16 text-green-500" />
                        <h3 className="text-2xl font-bold">Mesajınız Alındı!</h3>
                        <p className="text-muted-foreground">
                            En kısa sürede size dönüş yapacağız.
                        </p>
                        <Button onClick={() => setIsSuccess(false)} variant="outline">
                            Yeni Mesaj Gönder
                        </Button>
                    </div>
                ) : (
                    <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
                        <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                            <div className="space-y-2">
                                <label htmlFor="name" className="text-sm font-medium">Adınız</label>
                                <Input id="name" {...form.register("name")} placeholder="Adınız" />
                                {form.formState.errors.name && <p className="text-xs text-red-500">{form.formState.errors.name.message}</p>}
                            </div>
                            <div className="space-y-2 w-full">
                                <label htmlFor="surname" className="text-sm font-medium">Soyadınız</label>
                                <Input id="surname" {...form.register("surname")} placeholder="Soyadınız" />
                                {form.formState.errors.surname && <p className="text-xs text-red-500">{form.formState.errors.surname.message}</p>}
                            </div>
                        </div>
                        <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                            <div className="space-y-2">
                                <label htmlFor="email" className="text-sm font-medium">E-posta</label>
                                <Input id="email" type="email" {...form.register("email")} placeholder="ornek@sirket.com" />
                                {form.formState.errors.email && <p className="text-xs text-red-500">{form.formState.errors.email.message}</p>}
                            </div>
                            <div className="space-y-2">
                                <label htmlFor="phone" className="text-sm font-medium">Telefon</label>
                                <div className="relative w-full">
                                    <div className="absolute left-3 top-2 text-muted-foreground text-sm flex items-center gap-2 font-medium z-10 select-none pointer-events-none">
                                        <span>🇹🇷</span>
                                        <span>+90</span>
                                        <div className="w-px h-4 bg-border" />
                                    </div>
                                    <Input
                                        id="phone"
                                        type="tel"
                                        className="pl-20 font-mono"
                                        placeholder="(5XX) XXX XX XX"
                                        maxLength={15}
                                        {...form.register("phone", {
                                            onChange: (e) => {
                                                let value = e.target.value.replace(/\D/g, ''); // Remove non-digits
                                                if (value.startsWith('90')) value = value.slice(2); // Remove leading 90 if user types it

                                                // Format: (5XX) XXX XX XX
                                                let formattedValue = '';
                                                if (value.length > 0) formattedValue += '(' + value.substring(0, 3);
                                                if (value.length > 3) formattedValue += ') ' + value.substring(3, 6);
                                                if (value.length > 6) formattedValue += ' ' + value.substring(6, 8);
                                                if (value.length > 8) formattedValue += ' ' + value.substring(8, 10);

                                                e.target.value = formattedValue;
                                                return e;
                                            }
                                        })}
                                    />
                                </div>
                                {form.formState.errors.phone && <p className="text-xs text-red-500">{form.formState.errors.phone.message}</p>}
                            </div>
                        </div>
                        <div className="space-y-2">
                            <label htmlFor="subject" className="text-sm font-medium">Konu</label>
                            <Input id="subject" {...form.register("subject")} placeholder="Konu" />
                            {form.formState.errors.subject && <p className="text-xs text-red-500">{form.formState.errors.subject.message}</p>}
                        </div>
                        <div className="space-y-2">
                            <label htmlFor="message" className="text-sm font-medium">Mesajınız</label>
                            <Textarea id="message" {...form.register("message")} placeholder="Size nasıl yardımcı olabiliriz?" className="min-h-[120px]" />
                            {form.formState.errors.message && <p className="text-xs text-red-500">{form.formState.errors.message.message}</p>}
                        </div>
                        <Button size="lg" className="w-full" disabled={isSubmitting}>
                            {isSubmitting && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
                            Mesaj Gönder
                        </Button>
                    </form>
                )}
            </CardContent>
        </Card>
    )
}
