import 'package:flutter/material.dart';
import 'dart:math';

class AlienTechCover {
  static Widget generate(String textInput) {
    // 1. Keyword Extraction (Simplified)
    List<String> keywords = textInput.split(' ');

    // 2. Base Color
    Color baseColor = keywords.contains('blue') ? Colors.blue : Colors.green;

    // 3. Number of Circuit Lines
    int numLines = keywords.length + 5;

    return Container(
      decoration: BoxDecoration(
        color: baseColor.shade900, // Dark background
      ),
      child: Stack(
        children: [
          // Circuit Lines
          for (int i = 0; i < numLines; i++)
            Positioned(
              left: Random().nextDouble() * 300,
              top: Random().nextDouble() * 300,
              child: Container(
                width: Random().nextDouble() * 50 + 10,
                height: 2,
                color: baseColor.shade200.withOpacity(0.5), // Glowing line
              ),
            ),
          // Central Glow
          Center(
            child: Container(
              width: 80,
              height: 80,
              decoration: BoxDecoration(
                color: baseColor.shade400.withOpacity(0.7),
                shape: BoxShape.circle,
                boxShadow: [
                  BoxShadow(
                    color: baseColor.shade400,
                    blurRadius: 20,
                    spreadRadius: 5,
                  ),
                ],
              ),
            ),
          ),
          // Hexagon Pattern
          for (int i = 0; i < 5; i++)
            Positioned(
              left: Random().nextDouble() * 300,
              top: Random().nextDouble() * 300,
              child: Transform.rotate(
                angle: Random().nextDouble() * pi * 2,
                child: CustomPaint(
                  size: Size(20, (20 * 0.8660254037844386)), // Hexagon
                  painter: HexagonPainter(color: baseColor.shade300.withOpacity(0.6)),
                ),
              ),
            ),
        ],
      ),
    );
  }
}

class HexagonPainter extends CustomPainter {
  final Color color;
  HexagonPainter({required this.color});

  @override
  void paint(Canvas canvas, Size size) {
    final path = Path();
    final height = size.height;
    final width = size.width;

    path.moveTo(size.width / 2, 0);
    path.lineTo(width, height * 0.25);
    path.lineTo(width, height * 0.75);
    path.lineTo(size.width / 2, height);
    path.lineTo(0, height * 0.75);
    path.lineTo(0, height * 0.25);
    path.close();

    final paint = Paint()
      ..color = color
      ..style = PaintingStyle.fill;

    canvas.drawPath(path, paint);
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    return false;
  }
}