import 'dart:async';
import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';

class SplashScreen extends StatefulWidget {
  const SplashScreen({super.key});

  @override
  State<SplashScreen> createState() => _SplashScreenState();
}

class _SplashScreenState extends State<SplashScreen>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _scaleAnimation;
  late Animation<double> _opacityAnimation;

  @override
  void initState() {
    super.initState();

    _controller = AnimationController(
      vsync: this,
      duration: const Duration(seconds: 2),
    );

    _scaleAnimation = Tween<double>(begin: 0.6, end: 1.0).animate(
      CurvedAnimation(parent: _controller, curve: Curves.easeOutBack),
    );

    _opacityAnimation = Tween<double>(begin: 0.0, end: 1.0).animate(
      CurvedAnimation(parent: _controller, curve: Curves.easeIn),
    );

    _controller.forward();

    Timer(const Duration(seconds: 3), () {
      final user = FirebaseAuth.instance.currentUser;
      if (user != null) {
        Navigator.pushReplacementNamed(context, '/main');
      } else {
        Navigator.pushReplacementNamed(context, '/login');
      }
    });
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        decoration: const BoxDecoration(
          gradient: LinearGradient(
            colors: [Color(0xFF6B4EFF),Color(0xFF8B70FF) ],
            begin: Alignment.topLeft,
            end: Alignment.bottomRight,
          ),
        ),
        child: Center(
          child: AnimatedBuilder(
            animation: _controller,
            builder: (context, child) {
              return Opacity(
                opacity: _opacityAnimation.value,
                child: Transform.scale(
                  scale: _scaleAnimation.value,
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      Image.asset(
                        'assets/images/logo.png',
                        width: 80,
                        height: 80,
                      ),
                      const SizedBox(height: 20),
                      Text(
                        'AntiSpy Security',
                        style: Theme.of(context).textTheme.headlineMedium?.copyWith(
                              color: Colors.white,
                              fontWeight: FontWeight.bold,
                              letterSpacing: 1.2,
                            ),
                      ),
                      const SizedBox(height: 20),
                      const CircularProgressIndicator(color: Colors.white),
                    ],
                  ),
                ),
              );
            },
          ),
        ),
      ),
    );
  }
}