import 'package:go_router/go_router.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:shadcn_flutter/shadcn_flutter.dart';


Color contentBgColor(BuildContext context) {
  final theme = Theme.of(context);
  final h = HSLColor.fromColor(theme.colorScheme.border).hue;
  final dark = theme.brightness == Brightness.dark;
  return dark
      ? HSLColor.fromAHSL(1, h, 0.35, 0.13).toColor()
      : HSLColor.fromAHSL(1, h, 0.30, 0.88).toColor();
}


// The main shell. replaces Scaffold in all pages.
class AugorShell extends StatelessWidget {
  const AugorShell({
    super.key,
    required this.child,
    required this.titleTag,
    this.headerLeading = const [],
    this.headerTrailing = const [],
    this.statusLeft,
    this.statusRight,
  });

  final Widget child;
  final String titleTag;
  final List<Widget> headerLeading;
  final List<Widget> headerTrailing;
  final Widget? statusLeft;
  final Widget? statusRight;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);

    final monoStyle = GoogleFonts.ibmPlexMono(
      fontSize: 11,
      height: 1,
      fontWeight: FontWeight.w600,
      color: theme.colorScheme.mutedForeground,
    );

    return Column(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [

        // ── header ──────────────────────────────────────────────────────────
        Container(
          decoration: BoxDecoration(
            color: theme.colorScheme.background,
            border: Border(bottom: BorderSide(color: theme.colorScheme.border, width: 1)),
          ),
          child: IntrinsicHeight(
            child: Row(
              crossAxisAlignment: CrossAxisAlignment.stretch,
              children: [

                Padding(
                  padding: const EdgeInsets.only(left: 12, top: 4, bottom: 4),
                  child: Row(
                    children: headerLeading,
                  ),
                ),

                const Spacer(),

                ...headerTrailing,

                // title tag box
                Container(
                  color: theme.colorScheme.border,
                  constraints: const BoxConstraints(minWidth: 100),
                  alignment: Alignment.center,
                  padding: const EdgeInsets.symmetric(horizontal: 10),
                  child: RichText(
                    text: TextSpan(text: titleTag.toUpperCase(), style: monoStyle),
                  ),
                ),

                const SizedBox(width: 64), // mac traffic lights gap
              ],
            ),
          ),
        ),

        // ── content ─────────────────────────────────────────────────────────
        Expanded(
          child: Stack(
            fit: StackFit.expand,
            children: [
              ColoredBox(
                color: contentBgColor(context),
                child: child,
              ),
              const Positioned.fill(
                child: IgnorePointer(
                  child: CustomPaint(painter: _InsetShadowPainter()),
                ),
              ),
            ],
          ),
        ),

        // ── footer / status bar ─────────────────────────────────────────────
        Container(
          padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
          decoration: BoxDecoration(
            color: theme.colorScheme.background,
            border: Border(top: BorderSide(color: theme.colorScheme.border, width: 1)),
          ),
          child: Row(
            children: [

              Expanded(
                child: statusLeft ?? const SizedBox.shrink(),
              ),

              Expanded(
                child: Center(
                  child: _NavItems(),
                ),
              ),

              Expanded(
                child: Align(
                  alignment: Alignment.centerRight,
                  child: statusRight ?? const SizedBox.shrink(),
                ),
              ),

            ],
          ),
        ),

      ],
    );
  }
}


// shared footer nav — home and settings links
class _NavItems extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final location = GoRouterState.of(context).uri.toString();
    final theme = Theme.of(context);

    final monoStyle = GoogleFonts.ibmPlexMono(
      fontSize: 11,
      height: 1,
      fontWeight: FontWeight.w600,
    );

    Widget navItem(String label, String path) {
      final active = location == path || (path == '/' && location == '/');

      return GestureDetector(
        onTap: () => GoRouter.of(context).go(path),
        child: Container(
          padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
          decoration: BoxDecoration(
            color: active ? theme.colorScheme.border : Colors.transparent,
            borderRadius: BorderRadius.circular(3),
          ),
          child: RichText(
            text: TextSpan(
              text: label,
              style: monoStyle.copyWith(
                color: active
                    ? theme.colorScheme.foreground
                    : theme.colorScheme.mutedForeground,
              ),
            ),
          ),
        ),
      );
    }

    return Row(
      mainAxisSize: MainAxisSize.min,
      children: [
        navItem('Home', '/'),
        const SizedBox(width: 2),
        navItem('Settings', '/settings'),
      ],
    );
  }
}


// footer status text helper — use this for statusLeft / statusRight
class StatusText extends StatelessWidget {
  const StatusText(this.text, {super.key});

  final String text;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return RichText(
      text: TextSpan(
        text: text,
        style: GoogleFonts.ibmPlexMono(
          fontSize: 11,
          height: 1,
          fontWeight: FontWeight.w600,
          color: theme.colorScheme.mutedForeground,
        ),
      ),
    );
  }
}


class _InsetShadowPainter extends CustomPainter {
  const _InsetShadowPainter();

  @override
  void paint(Canvas canvas, Size size) {
    const blur = 12.0;
    final rect = Offset.zero & size;

    canvas.save();
    canvas.clipRect(rect);

    final innerRect = rect.deflate(24);
    final ringClip = Path()
      ..addRect(rect)
      ..addRect(innerRect)
      ..fillType = PathFillType.evenOdd;
    canvas.clipPath(ringClip);

    final path = Path()
      ..addRect(rect.inflate(blur * 2))
      ..addRect(rect)
      ..fillType = PathFillType.evenOdd;

    final paint = Paint()
      ..color = const Color(0x55000000)
      ..maskFilter = const MaskFilter.blur(BlurStyle.normal, blur);

    canvas.drawPath(path, paint);
    canvas.restore();
  }

  @override
  bool shouldRepaint(covariant CustomPainter old) => false;
}