import 'package:flutter/material.dart';
import '../theme/app_colors.dart';

/// TV focusable card with Stitch glow effect.
///
/// On focus/hover: blue glow border, subtle scale, diffused shadow.
class TvFocusableCard extends StatefulWidget {
  final Widget child;
  final VoidCallback? onTap;
  final VoidCallback? onFocus;
  final double scaleFactor;
  final Duration animationDuration;
  final Color? focusColor;
  final bool autofocus;
  final double borderRadius;

  /// Accessibility label announced by screen readers (e.g. channel title).
  final String? semanticLabel;

  const TvFocusableCard({
    super.key,
    required this.child,
    this.onTap,
    this.onFocus,
    this.scaleFactor = 1.03,
    this.animationDuration = const Duration(milliseconds: 200),
    this.focusColor,
    this.autofocus = false,
    this.borderRadius = 12.0,
    this.semanticLabel,
  });

  @override
  State<TvFocusableCard> createState() => _TvFocusableCardState();
}

class _TvFocusableCardState extends State<TvFocusableCard>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _scaleAnimation;
  bool _isFocused = false;
  bool _isHovered = false;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      vsync: this,
      duration: widget.animationDuration,
    );
    _scaleAnimation = Tween<double>(begin: 1.0, end: widget.scaleFactor)
        .animate(CurvedAnimation(parent: _controller, curve: Curves.easeInOut));
  }

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

  void _handleFocusChange(bool hasFocus) {
    if (widget.onFocus != null && hasFocus) {
      widget.onFocus!();
    }
    setState(() {
      _isFocused = hasFocus;
    });
    if (hasFocus) {
      _controller.forward();
    } else {
      _controller.reverse();
    }
  }

  void _handleHover(bool isHovered) {
    setState(() {
      _isHovered = isHovered;
    });
    if (isHovered || _isFocused) {
      _controller.forward();
    } else {
      _controller.reverse();
    }
  }

  @override
  Widget build(BuildContext context) {
    final isActive = _isFocused || _isHovered;
    final focusColor = widget.focusColor ?? AppColors.primaryContainer;

    return Semantics(
      button: widget.onTap != null,
      label: widget.semanticLabel,
      child: MouseRegion(
      onEnter: (_) => _handleHover(true),
      onExit: (_) => _handleHover(false),
      cursor: SystemMouseCursors.click,
      child: AnimatedBuilder(
        animation: _scaleAnimation,
        builder: (context, child) {
          return Transform.scale(
            scale: _scaleAnimation.value,
            child: child,
          );
        },
        child: Material(
          color: Colors.transparent,
          child: InkWell(
            onTap: widget.onTap,
            onFocusChange: _handleFocusChange,
            autofocus: widget.autofocus,
            borderRadius: BorderRadius.circular(widget.borderRadius),
            focusColor: Colors.transparent,
            hoverColor: Colors.transparent,
            highlightColor: Colors.transparent,
            splashColor: Colors.transparent,
            child: Container(
              decoration: BoxDecoration(
                borderRadius: BorderRadius.circular(widget.borderRadius),
                border: isActive
                    ? Border.all(
                        color: focusColor.withOpacity(0.5),
                        width: 2,
                      )
                    : Border.all(
                        color: AppColors.glassLevel1Border,
                        width: 1,
                      ),
                boxShadow: isActive
                    ? [
                        BoxShadow(
                          color: Colors.black.withOpacity(0.5),
                          blurRadius: 25,
                          offset: const Offset(0, 10),
                          spreadRadius: 2,
                        ),
                        BoxShadow(
                          color: focusColor.withOpacity(0.3),
                          blurRadius: 20,
                          spreadRadius: 1,
                        ),
                        BoxShadow(
                          color: focusColor.withOpacity(0.1),
                          blurRadius: 40,
                          spreadRadius: 4,
                        ),
                      ]
                    : [],
              ),
              child: ClipRRect(
                borderRadius: BorderRadius.circular(widget.borderRadius),
                child: widget.child,
              ),
            ),
          ),
        ),
      ),
      ),
    );
  }
}