import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:umbrix/core/localization/translations.dart';
import 'package:umbrix/gen/assets.gen.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';

class LicensesScreen extends HookConsumerWidget {
  const LicensesScreen({super.key});

  static Future<String> _loadAllLicenses() async {
    final licenses = await LicenseRegistry.licenses.toList();
    final buffer = StringBuffer();

    for (final license in licenses) {
      for (final package in license.packages) {
        buffer.writeln(package);
      }
      buffer.writeln();

      final paragraphs = license.paragraphs.toList();
      for (final paragraph in paragraphs) {
        buffer.writeln(paragraph.text);
      }

      buffer.writeln();
      buffer.writeln('=' * 80);
      buffer.writeln();
    }

    return buffer.toString();
  }

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final t = ref.watch(translationsProvider);
    return Scaffold(
      appBar: AppBar(
        title: Text(t.about.licenses),
      ),
      body: Column(
        children: [
          // Заголовок с логотипом
          Container(
            padding: const EdgeInsets.all(24),
            child: Column(
              children: [
                Assets.images.umbrixLogo.image(
                  width: 64,
                  height: 64,
                  fit: BoxFit.contain,
                ),
                const SizedBox(height: 12),
                const Text(
                  '0.1.0',
                  style: TextStyle(fontSize: 16),
                ),
              ],
            ),
          ),
          const Divider(height: 1),
          // Весь текст лицензий
          Expanded(
            child: FutureBuilder<String>(
              future: _loadAllLicenses(),
              builder: (context, snapshot) {
                if (snapshot.connectionState == ConnectionState.waiting) {
                  return const Center(child: CircularProgressIndicator());
                }

                if (snapshot.hasError) {
                  return Center(child: Text('Ошибка: ${snapshot.error}'));
                }

                return SingleChildScrollView(
                  padding: const EdgeInsets.all(16),
                  child: SelectableText(
                    snapshot.data ?? '',
                    style: const TextStyle(
                      fontSize: 5.5,
                      fontFamily: 'monospace',
                      height: 1.4,
                    ),
                  ),
                );
              },
            ),
          ),
        ],
      ),
    );
  }
}