"use client";

import { useState } from "react";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { z } from "zod";
import { createUser } from "@/actions/user";
import { Button } from "@/components/ui/button";
import {
  Form,
  FormControl,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form";
import { Input } from "@/components/ui/input";
import { PasswordInput } from "@/components/ui/PasswordInput";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { ArrowLeft } from "lucide-react";
import Link from "next/link";
import { useRouter } from "next/navigation";
import { toast } from "sonner";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";

const createUserSchema = z.object({
  firstName: z.string().min(1, "Vorname ist erforderlich"),
  lastName: z.string().min(1, "Nachname ist erforderlich"),
  email: z.string().email("Ungültige E-Mail-Adresse"),
  password: z.string().min(6, "Passwort muss mindestens 6 Zeichen lang sein"),
  role: z.enum(["user", "admin"], { required_error: "Rolle ist erforderlich" }),
  customer_id: z.string().uuid().optional().or(z.literal("")),
});

type CreateUserFormData = z.infer<typeof createUserSchema>;

export default function CreateUserPage() {
  const [isSubmitting, setIsSubmitting] = useState(false);
  const router = useRouter();

  const form = useForm<CreateUserFormData>({
    resolver: zodResolver(createUserSchema),
    defaultValues: {
      firstName: "",
      lastName: "",
      email: "",
      password: "",
      role: "user",
      customer_id: "",
    },
  });

  const onSubmit = async (data: CreateUserFormData) => {
    setIsSubmitting(true);
    try {
      await createUser({
        firstname: data.firstName,
        lastname: data.lastName,
        email: data.email,
        password: data.password,
        role: data.role,
        customer_id: data.customer_id || undefined,
      });
      toast.success("Benutzer erfolgreich erstellt");
      router.push("/dashboard/users/overview");
    } catch (error) {
      toast.error("Fehler beim Erstellen des Benutzers");
    } finally {
      setIsSubmitting(false);
    }
  };

  return (
    <div className="max-w-screen-2xl mx-auto px-4 sm:px-6 lg:px-8 py-10">
      <div className="mb-6">
        <Button variant="ghost" asChild>
          <Link href="/dashboard/users/overview">
            <ArrowLeft className="h-4 w-4 mr-2" />
            Zurück zur Übersicht
          </Link>
        </Button>
      </div>

      <Card className="max-w-2xl">
        <CardHeader>
          <CardTitle>Neuen Benutzer hinzufügen</CardTitle>
          <CardDescription>
            Füllen Sie die folgenden Felder aus, um einen neuen Benutzer zu
            erstellen.
          </CardDescription>
        </CardHeader>
        <CardContent>
          <Form {...form}>
            <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
              <FormField
                control={form.control}
                name="firstName"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Vorname</FormLabel>
                    <FormControl>
                      <Input placeholder="Vorname" {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={form.control}
                name="lastName"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Nachname</FormLabel>
                    <FormControl>
                      <Input placeholder="Nachname" {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={form.control}
                name="email"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>E-Mail</FormLabel>
                    <FormControl>
                      <Input
                        type="email"
                        placeholder="benutzer@example.com"
                        {...field}
                      />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={form.control}
                name="password"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Passwort</FormLabel>
                    <FormControl>
                      <PasswordInput placeholder="Passwort" {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={form.control}
                name="role"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Rolle</FormLabel>
                    <Select
                      onValueChange={field.onChange}
                      defaultValue={field.value}
                    >
                      <FormControl>
                        <SelectTrigger>
                          <SelectValue placeholder="Rolle auswählen" />
                        </SelectTrigger>
                      </FormControl>
                      <SelectContent>
                        <SelectItem value="user">Benutzer</SelectItem>
                        <SelectItem value="staff">Mitarbeiter</SelectItem>
                        <SelectItem value="admin">Administrator</SelectItem>
                      </SelectContent>
                    </Select>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <FormField
                control={form.control}
                name="customer_id"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Kunden-ID (optional)</FormLabel>
                    <FormControl>
                      <Input placeholder="UUID" {...field} />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />
              <div className="flex justify-end gap-2">
                <Button
                  type="button"
                  variant="outline"
                  onClick={() => router.push("/dashboard/users/overview")}
                  disabled={isSubmitting}
                >
                  Abbrechen
                </Button>
                <Button type="submit" disabled={isSubmitting}>
                  {isSubmitting ? "Erstellen..." : "Benutzer erstellen"}
                </Button>
              </div>
            </form>
          </Form>
        </CardContent>
      </Card>
    </div>
  );
}