import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
import '../../../../core/theme/design_tokens.dart';
import '../../../../shared/widgets/app_pressable.dart';
import '../../../../shared/widgets/toast/toast.dart';
import '../../../../shared/widgets/toast/toast_type.dart';
import '../../../auth/presentation/bloc/auth_bloc.dart';
import '../../../auth/presentation/bloc/auth_event.dart';
import '../../../auth/presentation/bloc/auth_state.dart';
import '../../../../shared/widgets/app_button.dart';
import '../widgets/account_section_card.dart';
import '../widgets/settings_page_scaffold.dart';

class AccountScreen extends StatelessWidget {
  const AccountScreen({super.key});

  static const double _menuItemHeight = AppSpacing.xl * 2 + AppSpacing.md;
  static const double _menuItemHorizontalPadding = AppSpacing.md;
  static const double _menuIconSize = 20;
  static const double _menuChevronSize = 18;

  @override
  Widget build(BuildContext context) {
    return SettingsPageScaffold(
      title: '账户',
      onBack: () => context.pop(),
      body: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [_buildListSurface(context)],
      ),
    );
  }

  Widget _buildListSurface(BuildContext context) {
    return AccountSectionCard(
      backgroundColor: AppColors.white,
      borderColor: AppColors.borderSecondary,
      contentPadding: const EdgeInsets.symmetric(
        horizontal: AppSpacing.md,
        vertical: AppSpacing.sm,
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.stretch,
        children: [
          _buildMenuItem(
            icon: Icons.edit,
            title: '编辑资料',
            onTap: () => context.push('/edit-profile'),
          ),
          _buildDivider(),
          _buildMenuItem(
            icon: Icons.logout,
            title: '退出登录',
            titleColor: AppColors.feedbackErrorText,
            iconColor: AppColors.feedbackErrorIcon,
            trailingColor: AppColors.feedbackErrorIcon,
            onTap: () => _showLogoutSheet(context),
          ),
        ],
      ),
    );
  }

  Widget _buildMenuItem({
    required IconData icon,
    required String title,
    required VoidCallback onTap,
    Color titleColor = AppColors.slate900,
    Color iconColor = AppColors.slate500,
    Color trailingColor = AppColors.slate400,
  }) {
    return AppPressable(
      onTap: onTap,
      borderRadius: BorderRadius.circular(AppRadius.md),
      child: Container(
        constraints: const BoxConstraints(minHeight: _menuItemHeight),
        padding: const EdgeInsets.symmetric(
          horizontal: _menuItemHorizontalPadding,
          vertical: AppSpacing.sm,
        ),
        child: Row(
          crossAxisAlignment: CrossAxisAlignment.center,
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Row(
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                SizedBox(
                  width: _menuIconSize,
                  child: Icon(icon, size: _menuIconSize, color: iconColor),
                ),
                const SizedBox(width: AppSpacing.md),
                Text(
                  title,
                  style: TextStyle(
                    fontSize: 16,
                    fontWeight: FontWeight.w600,
                    color: titleColor,
                  ),
                ),
              ],
            ),
            Icon(
              Icons.chevron_right,
              size: _menuChevronSize,
              color: trailingColor,
            ),
          ],
        ),
      ),
    );
  }

  Widget _buildDivider() {
    return Container(
      height: 1,
      margin: const EdgeInsets.only(
        left: _menuItemHorizontalPadding + _menuIconSize + AppSpacing.md,
        right: _menuItemHorizontalPadding,
      ),
      color: AppColors.borderTertiary,
    );
  }

  void _showLogoutSheet(BuildContext context) {
    showModalBottomSheet<void>(
      context: context,
      backgroundColor: Colors.transparent,
      isScrollControlled: true,
      builder: (sheetContext) => SafeArea(
        top: false,
        child: Container(
          margin: const EdgeInsets.fromLTRB(
            AppSpacing.md,
            AppSpacing.none,
            AppSpacing.md,
            AppSpacing.md,
          ),
          padding: const EdgeInsets.all(AppSpacing.lg),
          decoration: BoxDecoration(
            color: AppColors.white,
            borderRadius: BorderRadius.circular(AppRadius.xl),
            border: Border.all(color: AppColors.borderSecondary),
          ),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              const Text(
                '退出登录',
                style: TextStyle(
                  fontSize: 18,
                  fontWeight: FontWeight.w700,
                  color: AppColors.slate900,
                ),
                textAlign: TextAlign.center,
              ),
              const SizedBox(height: AppSpacing.xs),
              const Text(
                '确定退出当前账户吗？',
                style: TextStyle(fontSize: 14, color: AppColors.slate500),
                textAlign: TextAlign.center,
              ),
              const SizedBox(height: AppSpacing.lg),
              SizedBox(
                height: 52,
                child: GestureDetector(
                  onTap: () async {
                    Navigator.of(sheetContext).pop();
                    final authBloc = context.read<AuthBloc>();
                    authBloc.add(AuthLoggedOut());
                    try {
                      await authBloc.stream
                          .firstWhere((state) => state is AuthUnauthenticated)
                          .timeout(const Duration(seconds: 5));
                    } catch (_) {
                      if (context.mounted) {
                        Toast.show(
                          context,
                          '退出失败，请稍后重试',
                          type: ToastType.error,
                        );
                      }
                      return;
                    }
                    if (context.mounted) {
                      context.go('/');
                    }
                  },
                  child: Container(
                    decoration: BoxDecoration(
                      color: AppColors.feedbackErrorIcon,
                      borderRadius: BorderRadius.circular(AppRadius.full),
                    ),
                    alignment: Alignment.center,
                    child: const Text(
                      '确认退出',
                      style: TextStyle(
                        fontSize: 15,
                        fontWeight: FontWeight.w700,
                        color: AppColors.white,
                      ),
                    ),
                  ),
                ),
              ),
              const SizedBox(height: AppSpacing.sm),
              SizedBox(
                height: 52,
                child: AppButton(
                  text: '取消',
                  isOutlined: true,
                  onPressed: () => Navigator.of(sheetContext).pop(),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}