import 'package:flutter/material.dart';
import 'package:remever/common/resources.dart';

class MarkdownText extends StatelessWidget {
  final String text;
  final TextStyle? baseStyle;

  const MarkdownText(this.text, {super.key, this.baseStyle});

  @override
  Widget build(BuildContext context) {
    return SelectableText.rich(
      TextSpan(
        children: _parseMarkdown(text),
        style:
            baseStyle ??
            const TextStyle(fontSize: 14, color: AppColors.body_text),
      ),
    );
  }

  List<TextSpan> _parseMarkdown(String text) {
    final lines = text.split('\n');
    final spans = <TextSpan>[];

    for (var line in lines) {
      final trimmed = line.trim();

      // H1
      if (trimmed.startsWith('# ') && trimmed.length > 2) {
        spans.add(
          TextSpan(
            text: '${trimmed.substring(2)}\n',
            style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
          ),
        );
        continue;
      }

      // Нумерованный список
      if (RegExp(r'^\d+\.\s').hasMatch(trimmed)) {
        final match = RegExp(r'^(\d+)\.\s(.+)').firstMatch(trimmed);
        if (match != null) {
          spans.add(
            TextSpan(
              text: '${match.group(0)!}\n',
              style: const TextStyle(fontSize: 14),
            ),
          );
          continue;
        }
      }

      // Маркированный список
      if (trimmed.startsWith('• ') && trimmed.length > 2) {
        spans.add(
          TextSpan(
            text: '${trimmed.substring(2)}\n',
            style: const TextStyle(fontSize: 14),
          ),
        );
        continue;
      }

      // Жирный текст
      final boldRegex = RegExp(r'\*\*([^*]+)\*\*');
      var remaining = line;
      var boldProcessed = <TextSpan>[];

      int lastEnd = 0;
      for (final match in boldRegex.allMatches(line)) {
        if (match.start > lastEnd) {
          boldProcessed.add(
            TextSpan(text: line.substring(lastEnd, match.start)),
          );
        }
        boldProcessed.add(
          TextSpan(
            text: match.group(1),
            style: const TextStyle(fontWeight: FontWeight.bold),
          ),
        );
        lastEnd = match.end;
      }
      if (lastEnd < line.length) {
        boldProcessed.add(TextSpan(text: line.substring(lastEnd)));
      }

      boldProcessed.add(const TextSpan(text: '\n'));
      spans.addAll(boldProcessed);
    }

    return spans;
  }
}