// Author: fruit.com.cn

import 'dart:async';

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

import '../../core/legal/legal_opener.dart';
import '../../core/legal/legal_page.dart';
import '../../core/theme/app_colors.dart';
import '../../l10n/app_localizations.dart';

const double _legalFontSize = 12;

/// 登录页底部的协议入口。点用户协议或隐私政策会打开对应语言的页面。
class AuthLegalLinks extends StatefulWidget {
  const AuthLegalLinks({super.key, this.open});

  /// 测试时可替换真正的跳转。
  final Future<void> Function(String url)? open;

  @override
  State<AuthLegalLinks> createState() => _AuthLegalLinksState();
}

class _AuthLegalLinksState extends State<AuthLegalLinks> {
  late final TapGestureRecognizer _termsTap = TapGestureRecognizer()
    ..onTap = () => _open(legalTermsPath);
  late final TapGestureRecognizer _privacyTap = TapGestureRecognizer()
    ..onTap = () => _open(legalPrivacyPath);

  @override
  void dispose() {
    _termsTap.dispose();
    _privacyTap.dispose();
    super.dispose();
  }

  void _open(String path) {
    final url = legalPageUrl(path, Localizations.localeOf(context));
    final custom = widget.open;
    if (custom != null) {
      unawaited(custom(url));
      return;
    }
    unawaited(openLegalUrlOrNotify(context, url));
  }

  @override
  Widget build(BuildContext context) {
    final l10n = AppLocalizations.of(context)!;
    final muted = TextStyle(color: AppColors.muted, fontSize: _legalFontSize, height: 1.6);
    final link = muted.copyWith(color: AppColors.blue);
    return Text.rich(
      TextSpan(
        style: muted,
        children: [
          TextSpan(text: l10n.authLegalLead),
          const TextSpan(text: ' '),
          TextSpan(text: l10n.authTerms, style: link, recognizer: _termsTap),
          const TextSpan(text: ' '),
          TextSpan(text: l10n.authLegalJoin),
          const TextSpan(text: ' '),
          TextSpan(
            text: l10n.authPrivacy,
            style: link,
            recognizer: _privacyTap,
          ),
        ],
      ),
      key: const Key('auth-legal'),
      textAlign: TextAlign.center,
    );
  }
}