frontend/app/routes/register.tsx

import type { Route } from "./+types/login";
import { Alert, AlertDescription } from "~/components/ui/alert";
import { AlertCircleIcon, IdCardIcon, LoaderCircle, LogIn, MailIcon } from "lucide-react";
import { Label } from "~/components/ui/label";
import { Input } from "~/components/ui/input";
import { Button } from "~/components/ui/button";
import { useState } from "react";
import AuthLayout from "~/layout";
import { useNavigate, useSearchParams } from "react-router";
import { capitalizeFirstLetter } from "~/lib/utils";
import { Combobox } from "~/components/combobox";

export function meta({ }: Route.MetaArgs) {
  return [
    { title: "Khollisé - Inscription" },
    { name: "description", content: "Connectez-vous à Khollisé" },
  ];
}

export default function Register() {
  const navigate = useNavigate();

  const [searchParams] = useSearchParams();
  const email = searchParams.get("email")!;
  const [emailFirst, emailLast] = getNameFromEmail(email);
  const [firstName, setFirstName] = useState(emailFirst);
  const [lastName, setLastName] = useState(emailLast);

  const [error, setError] = useState<string | null>(null);
  const [isLoading, setIsLoading] = useState(false);

  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    setError(null);
    // TODO: Validate...
    // TODO: Check if combobox is valid (not empty !!)
    setIsLoading(true);
    // TODO: Fetch function
    const sleep = (ms: number) =>
      new Promise((resolve) => setTimeout(resolve, ms));
    await sleep(5000)
      .then((data) => {
        setIsLoading(false);
        // TODO: Callback
      })
      .catch((err) => {
        setIsLoading(false);
        setError(err.message);
      });
  };

  return (
    <AuthLayout title="Inscription" description="Créez votre compte pour accéder à Khollisé.">
      <form onSubmit={handleSubmit} className="space-y-4">
        <div className="space-y-2">
          <Label htmlFor="email">Email</Label>
          <div className="relative">
            <div className="absolute inset-y-0 left-0 flex items-center pl-3 pointer-events-none text-gray-500">
              <MailIcon className="h-5 w-5" />
            </div>
            <Input
              id="email"
              type="email"
              className="disabled:opacity-100 pl-10"
              value={email}
              disabled
              required
            />
          </div>
        </div>

        <div className="space-y-2 flex gap-4">
          <div>
            <Label htmlFor="password">Prénom</Label>
            <Input
              id="firstName"
              type="text"
              placeholder="Claire"
              value={firstName}
              onChange={(e) => setFirstName(capitalizeFirstLetter(e.target.value))}
              required
            />
          </div>

          <div className="space-y-2">
            <Label htmlFor="password">Nom</Label>
            <Input
              id="lastName"
              type="text"
              placeholder="DUPONT"
              value={lastName}
              onChange={(e) => setLastName(e.target.value.toUpperCase())}
              required
            />
          </div>
        </div>

        <div className="space-y-2">
          <Label htmlFor="password">Classe</Label>
          <div className="block">
            {/* TODO: Pass ref to combobox to validate */}
            <Combobox
              defaultText="Sélectionnez votre classe..."
              // TODO: Fetch function
              values={[
                { value: "1", label: "1ère" },
                { value: "2", label: "2ème" },
                { value: "3", label: "3ème" },
                { value: "4", label: "4ème" },
                { value: "5", label: "5ème" },
              ]}
              emptyText="Chargement..."
              placeholderText="Rechercher"
            />
          </div>
        </div>

        {error && (
          <Alert variant="destructive" className="pb-2">
            <AlertCircleIcon className="h-4 w-4" />
            <AlertDescription>{error}</AlertDescription>
          </Alert>
        )}

        <Button type="submit" className="w-full" disabled={isLoading}>
          {isLoading ? (
            <>
              <LoaderCircle className="h-4 w-4 animate-spin mr-2" />
              Inscription en cours...
            </>
          ) : (
            <>
              <LogIn className="h-4 w-4 mr-2" />
              S'inscrire
            </>
          )}
        </Button>
      </form>
    </AuthLayout>
  );
}

function getNameFromEmail(email: string): [string, string] {
  const parts = email.split("@")[0].split(".");
  if (parts.length < 2) return ["", ""];
  const firstName = capitalizeFirstLetter(parts[0]);
  const lastName = parts.slice(1).join(" ").toUpperCase();
  return [firstName, lastName];
}