"use client";

// ============================================================================
// Auth Complete Page
// ============================================================================

import React, { useEffect, useState, Suspense } from "react";
import { useSearchParams, useRouter } from "next/navigation";
import { useAuth } from "@/components/auth/auth-provider";
import {
  Card,
  CardContent,
  CardDescription,
  CardHeader,
  CardTitle,
} from "@/components/ui/card";
import { AlertCircle, CheckCircle, Loader2 } from "lucide-react";
import { Alert, AlertDescription } from "@/components/ui/alert";
import { Button } from "@/components/ui/button";

function AuthCompleteContent() {
  const searchParams = useSearchParams();
  const router = useRouter();
  const { login } = useAuth();
  const [status, setStatus] = useState<"loading" | "success" | "error">(
    "loading"
  );
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    const token = searchParams.get("token");

    if (!token) {
      setStatus("error");
      setError("Токен авторизации не найден");
      return;
    }

    const completeAuth = async () => {
      try {
        await login(token);
        setStatus("success");

        // Redirect after short delay
        setTimeout(() => {
          router.push("/");
        }, 1500);
      } catch (err: any) {
        setStatus("error");
        setError(err?.error?.message || "Ошибка авторизации");
      }
    };

    completeAuth();
  }, [searchParams, login, router]);

  return (
    <div className="flex min-h-screen items-center justify-center bg-gradient-to-br from-slate-50 to-slate-100 dark:from-slate-950 dark:to-slate-900 p-4">
      <Card className="w-full max-w-md">
        <CardHeader className="text-center">
          <div className="mx-auto mb-4">
            {status === "loading" && (
              <Loader2 className="h-12 w-12 animate-spin text-primary" />
            )}
            {status === "success" && (
              <CheckCircle className="h-12 w-12 text-green-500" />
            )}
            {status === "error" && (
              <AlertCircle className="h-12 w-12 text-destructive" />
            )}
          </div>

          <CardTitle>
            {status === "loading" && "Авторизация..."}
            {status === "success" && "Успешно!"}
            {status === "error" && "Ошибка"}
          </CardTitle>

          <CardDescription>
            {status === "loading" && "Пожалуйста, подождите"}
            {status === "success" && "Перенаправляем в приложение..."}
            {status === "error" && error}
          </CardDescription>
        </CardHeader>

        {status === "error" && (
          <CardContent>
            <Alert variant="destructive" className="mb-4">
              <AlertCircle className="h-4 w-4" />
              <AlertDescription>{error}</AlertDescription>
            </Alert>

            <Button onClick={() => router.push("/login")} className="w-full">
              Вернуться к входу
            </Button>
          </CardContent>
        )}
      </Card>
    </div>
  );
}

export default function AuthCompletePage() {
  return (
    <Suspense
      fallback={
        <div className="flex min-h-screen items-center justify-center">
          <Loader2 className="h-12 w-12 animate-spin text-primary" />
        </div>
      }
    >
      <AuthCompleteContent />
    </Suspense>
  );
}