import 'package:flutter/material.dart';

/// Custom page route with smooth fade transition
class FadePageRoute<T> extends PageRouteBuilder<T> {
  final Widget page;
  final Duration duration;

  FadePageRoute({
    required this.page,
    this.duration = const Duration(milliseconds: 400),
  }) : super(
         pageBuilder: (context, animation, secondaryAnimation) => page,
         transitionDuration: duration,
         reverseTransitionDuration: duration,
         transitionsBuilder: (context, animation, secondaryAnimation, child) {
           return FadeTransition(
             opacity: animation.drive(
               Tween<double>(
                 begin: 0.0,
                 end: 1.0,
               ).chain(CurveTween(curve: Curves.easeInOut)),
             ),
             child: child,
           );
         },
       );
}

/// Custom page route with slide up + fade transition
class SlideUpFadePageRoute<T> extends PageRouteBuilder<T> {
  final Widget page;
  final Duration duration;

  SlideUpFadePageRoute({
    required this.page,
    this.duration = const Duration(milliseconds: 350),
  }) : super(
         pageBuilder: (context, animation, secondaryAnimation) => page,
         transitionDuration: duration,
         reverseTransitionDuration: duration,
         transitionsBuilder: (context, animation, secondaryAnimation, child) {
           final offsetAnimation =
               Tween<Offset>(
                 begin: const Offset(0, 0.1),
                 end: Offset.zero,
               ).animate(
                 CurvedAnimation(parent: animation, curve: Curves.easeOutCubic),
               );

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

           return FadeTransition(
             opacity: fadeAnimation,
             child: SlideTransition(position: offsetAnimation, child: child),
           );
         },
       );
}

/// Custom page route with scale + fade transition (good for splash to onboarding)
class ScaleFadePageRoute<T> extends PageRouteBuilder<T> {
  final Widget page;
  final Duration duration;

  ScaleFadePageRoute({
    required this.page,
    this.duration = const Duration(milliseconds: 450),
  }) : super(
         pageBuilder: (context, animation, secondaryAnimation) => page,
         transitionDuration: duration,
         reverseTransitionDuration: duration,
         transitionsBuilder: (context, animation, secondaryAnimation, child) {
           final scaleAnimation = Tween<double>(begin: 0.95, end: 1.0).animate(
             CurvedAnimation(parent: animation, curve: Curves.easeOutCubic),
           );

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

           return FadeTransition(
             opacity: fadeAnimation,
             child: ScaleTransition(scale: scaleAnimation, child: child),
           );
         },
       );
}