import 'package:flutter/material.dart';

class PluriMarkdown extends StatelessWidget {
  const PluriMarkdown(this.markdown, {super.key});

  final String markdown;

  @override
  Widget build(BuildContext context) {
    final widgets = <Widget>[];
    for (final raw in markdown.split('\n')) {
      final line = raw.trimRight();
      if (line.trim().isEmpty) {
        widgets.add(const SizedBox(height: 8));
      } else if (line.startsWith('# ')) {
        widgets.add(_Heading(line.substring(2), level: 1));
      } else if (line.startsWith('## ')) {
        widgets.add(_Heading(line.substring(3), level: 2));
      } else if (line.startsWith('- ')) {
        widgets.add(_Bullet(line.substring(2)));
      } else if (!line.toLowerCase().startsWith('resumen:') &&
          !line.toLowerCase().startsWith('summary:')) {
        widgets.add(_Paragraph(line));
      }
    }
    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: widgets,
    );
  }
}

class _Heading extends StatelessWidget {
  const _Heading(this.text, {required this.level});

  final String text;
  final int level;

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return Padding(
      padding: EdgeInsets.only(top: level == 1 ? 0 : 14, bottom: 8),
      child: Text(
        text,
        style: (level == 1
                ? theme.textTheme.headlineSmall
                : theme.textTheme.titleMedium)
            ?.copyWith(fontWeight: FontWeight.w900),
      ),
    );
  }
}

class _Paragraph extends StatelessWidget {
  const _Paragraph(this.text);

  final String text;

  @override
  Widget build(BuildContext context) => Padding(
    padding: const EdgeInsets.only(bottom: 8),
    child: Text(text, style: Theme.of(context).textTheme.bodyMedium),
  );
}

class _Bullet extends StatelessWidget {
  const _Bullet(this.text);

  final String text;

  @override
  Widget build(BuildContext context) => Padding(
    padding: const EdgeInsets.only(bottom: 8),
    child: Row(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Icon(
          Icons.auto_awesome_rounded,
          size: 18,
          color: Theme.of(context).colorScheme.primary,
        ),
        const SizedBox(width: 8),
        Expanded(child: Text(text)),
      ],
    ),
  );
}