import 'package:flutter/material.dart';

import '../../../core/theme/app_colors.dart';
import '../../../core/widgets/app_icon.dart';
import '../../../core/widgets/pressable.dart';
import '../../../core/widgets/surface_card.dart';
import '../../../data/models/system_status.dart';

/// Quiet battery / Wi-Fi readout. It is information, not a toolbar.
class StatusCluster extends StatelessWidget {
  const StatusCluster({
    super.key,
    required this.status,
    this.compact = false,
    this.showBattery = true,
    this.onOpenSettings,
  });

  final SystemStatus status;
  final bool compact;
  final bool showBattery;
  final VoidCallback? onOpenSettings;

  @override
  Widget build(BuildContext context) {
    final colors = context.colors;
    final theme = Theme.of(context);
    final batteryColor = status.batteryLevel <= 15 && !status.charging
        ? colors.danger
        : (status.charging ? colors.accent : colors.ink);

    return SurfaceCard(
      padding: EdgeInsets.symmetric(
        horizontal: compact ? 16 : 20,
        vertical: compact ? 10 : 12,
      ),
      radius: 999,
      color: colors.surface.withValues(alpha: 0.82),
      showShadow: false,
      child: Row(
        mainAxisSize: MainAxisSize.min,
        children: [
          Semantics(
            label: status.wifi ? 'Wi-Fi connected' : 'Wi-Fi disconnected',
            child: AppIcon(
              status.wifi
                  ? 'assets/icons/wifi.svg'
                  : 'assets/icons/wifi-off.svg',
              size: compact ? 18 : 20,
              color: status.wifi ? colors.ink : colors.inkFaint,
            ),
          ),
          if (onOpenSettings != null) ...[
            SizedBox(width: compact ? 10 : 12),
            Pressable(
              onTap: onOpenSettings!,
              semanticLabel: 'Open settings',
              pressedScale: 0.92,
              child: Container(
                width: compact ? 28 : 30,
                height: compact ? 28 : 30,
                decoration: BoxDecoration(
                  color: colors.surfaceStrong,
                  shape: BoxShape.circle,
                  border: Border.all(color: colors.border),
                ),
                alignment: Alignment.center,
                child: AppIcon(
                  'assets/icons/settings.svg',
                  size: compact ? 15 : 17,
                  color: colors.inkMuted,
                ),
              ),
            ),
          ],
          if (showBattery) ...[
            SizedBox(width: compact ? 12 : 16),
            _BatteryGlyph(
              level: status.batteryLevel,
              charging: status.charging,
              color: batteryColor,
            ),
            const SizedBox(width: 8),
            Text(
              '${status.batteryLevel}%',
              style: theme.textTheme.labelLarge?.copyWith(
                color: colors.ink,
                fontSize: compact ? 13 : 14,
              ),
            ),
            if (status.charging) ...[
              const SizedBox(width: 6),
              Icon(
                Icons.bolt_rounded,
                size: compact ? 16 : 18,
                color: colors.accent,
              ),
            ],
          ],
        ],
      ),
    );
  }
}

class _BatteryGlyph extends StatelessWidget {
  const _BatteryGlyph({
    required this.level,
    required this.charging,
    required this.color,
  });

  final int level;
  final bool charging;
  final Color color;

  @override
  Widget build(BuildContext context) {
    return SizedBox(
      width: 28,
      height: 15,
      child: CustomPaint(
        painter: _BatteryPainter(
          level: level,
          color: color,
          charging: charging,
        ),
      ),
    );
  }
}

class _BatteryPainter extends CustomPainter {
  _BatteryPainter({
    required this.level,
    required this.color,
    required this.charging,
  });

  final int level;
  final Color color;
  final bool charging;

  @override
  void paint(Canvas canvas, Size size) {
    final body = Rect.fromLTWH(0, 1, size.width - 4, size.height - 2);
    final radius = Radius.circular(body.height / 2);
    final outline = Paint()
      ..color = color.withValues(alpha: 0.52)
      ..style = PaintingStyle.stroke
      ..strokeWidth = 1.3;
    final cap = Paint()..color = color.withValues(alpha: 0.52);

    canvas.drawRRect(RRect.fromRectAndRadius(body, radius), outline);
    canvas.drawRRect(
      RRect.fromRectAndRadius(
        Rect.fromLTWH(
          size.width - 3.5,
          size.height * 0.34,
          2.5,
          size.height * 0.32,
        ),
        const Radius.circular(1),
      ),
      cap,
    );

    final inset = body.deflate(2.4);
    final fillWidth = inset.width * (level.clamp(0, 100) / 100);
    if (fillWidth > 0) {
      final fill = Paint()..color = color;
      canvas.drawRRect(
        RRect.fromRectAndRadius(
          Rect.fromLTWH(inset.left, inset.top, fillWidth, inset.height),
          const Radius.circular(2.4),
        ),
        fill,
      );
    }
  }

  @override
  bool shouldRepaint(covariant _BatteryPainter oldDelegate) {
    return oldDelegate.level != level ||
        oldDelegate.color != color ||
        oldDelegate.charging != charging;
  }
}