import 'package:flutter/material.dart';

import '../../../models/network/network_device.dart';

/// A styled node representing one network device on the topology canvas.
///
/// Designed to feel solid at ~120-160dp wide so it remains legible at the
/// "good for 200 nodes" zoom level called out in the V1 spec.
///
/// The node has three visual states beyond its default rest:
///   - [isSelected]: stronger primary-tinted background + 2dp primary border.
///   - [isHighlighted]: softer secondary tint + primary outline, used when an
///     edge touching this device is hovered on the canvas.
///   - [isSelected] takes precedence over [isHighlighted].
class DeviceNode extends StatelessWidget {
  const DeviceNode({
    super.key,
    required this.device,
    this.portCount,
    this.isSelected = false,
    this.isHighlighted = false,
    this.onTap,
  });

  final NetworkDevice device;
  final int? portCount;
  final bool isSelected;
  final bool isHighlighted;
  final VoidCallback? onTap;

  IconData _iconForKind(NetworkDeviceKind kind) {
    switch (kind) {
      case NetworkDeviceKind.router:
        return Icons.router_outlined;
      case NetworkDeviceKind.switchDevice:
        return Icons.hub_outlined;
      case NetworkDeviceKind.ap:
        return Icons.wifi_outlined;
      case NetworkDeviceKind.firewall:
        return Icons.security_outlined;
      case NetworkDeviceKind.server:
        return Icons.dns_outlined;
      case NetworkDeviceKind.endpoint:
        return Icons.devices_outlined;
      case NetworkDeviceKind.patchPanel:
        return Icons.view_module_outlined;
      case NetworkDeviceKind.other:
        return Icons.device_unknown_outlined;
    }
  }

  Color _accentForRole(ColorScheme cs, NetworkDeviceRole? role) {
    switch (role) {
      case NetworkDeviceRole.core:
        return cs.error;
      case NetworkDeviceRole.distribution:
        return cs.tertiary;
      case NetworkDeviceRole.access:
        return cs.primary;
      case NetworkDeviceRole.edge:
        return cs.secondary;
      case NetworkDeviceRole.endpoint:
      case null:
        return cs.outline;
    }
  }

  @override
  Widget build(BuildContext context) {
    final cs = Theme.of(context).colorScheme;
    final tt = Theme.of(context).textTheme;
    final accent = _accentForRole(cs, device.role);

    final bgColor = isSelected
        ? cs.primaryContainer
        : isHighlighted
            ? cs.secondaryContainer.withValues(alpha: 0.6)
            : cs.surfaceContainerHigh;
    final borderColor = isSelected
        ? cs.primary
        : isHighlighted
            ? cs.primary.withValues(alpha: 0.8)
            : accent.withValues(alpha: 0.6);
    final borderWidth = isSelected ? 2.0 : (isHighlighted ? 1.5 : 1.0);

    return AnimatedContainer(
      duration: const Duration(milliseconds: 180),
      curve: Curves.easeOut,
      decoration: BoxDecoration(
        color: bgColor,
        borderRadius: BorderRadius.circular(16),
        border: Border.all(color: borderColor, width: borderWidth),
        boxShadow: (isHighlighted || isSelected)
            ? [
                BoxShadow(
                  color: cs.primary.withValues(alpha: 0.18),
                  blurRadius: 12,
                  offset: const Offset(0, 2),
                ),
              ]
            : null,
      ),
      child: Material(
        color: Colors.transparent,
        child: InkWell(
          onTap: onTap,
          borderRadius: BorderRadius.circular(16),
          child: Container(
            width: 160,
            padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              mainAxisSize: MainAxisSize.min,
              children: [
                Row(
                  children: [
                    Icon(_iconForKind(device.kind), size: 18, color: accent),
                    const SizedBox(width: 6),
                    Expanded(
                      child: Text(
                        device.kind.label,
                        style: tt.labelSmall?.copyWith(color: accent),
                        maxLines: 1,
                        overflow: TextOverflow.ellipsis,
                      ),
                    ),
                  ],
                ),
                const SizedBox(height: 4),
                Text(
                  device.name,
                  style: tt.bodyMedium?.copyWith(fontWeight: FontWeight.w600),
                  maxLines: 2,
                  overflow: TextOverflow.ellipsis,
                ),
                if (device.vendor != null || device.model != null) ...[
                  const SizedBox(height: 2),
                  Text(
                    [
                      if (device.vendor != null) device.vendor,
                      if (device.model != null) device.model,
                    ].whereType<String>().join(' • '),
                    style: tt.labelSmall?.copyWith(color: cs.onSurfaceVariant),
                    maxLines: 1,
                    overflow: TextOverflow.ellipsis,
                  ),
                ],
                if (portCount != null) ...[
                  const SizedBox(height: 4),
                  Row(
                    children: [
                      Icon(
                        Icons.cable_outlined,
                        size: 12,
                        color: cs.onSurfaceVariant,
                      ),
                      const SizedBox(width: 4),
                      Text(
                        '$portCount ports',
                        style: tt.labelSmall?.copyWith(
                          color: cs.onSurfaceVariant,
                        ),
                      ),
                    ],
                  ),
                ],
              ],
            ),
          ),
        ),
      ),
    );
  }
}