jiu/client/lib/screens/settings/settings_screen.dart

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import '../../core/theme/app_theme.dart';
import '../../models/number_rule.dart';
import '../../models/user.dart';
import '../../models/warehouse.dart';
import '../../providers/number_rule_provider.dart';
import '../../providers/user_provider.dart';
import '../../providers/warehouse_provider.dart';

class SettingsScreen extends ConsumerStatefulWidget {
  const SettingsScreen({super.key});

  @override
  ConsumerState<SettingsScreen> createState() => _SettingsScreenState();
}

class _SettingsScreenState extends ConsumerState<SettingsScreen> {
  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
      length: 4,
      child: Column(
        children: [
          Container(
            color: AppTheme.surface,
            child: const TabBar(
              isScrollable: true,
              labelColor: AppTheme.primary,
              unselectedLabelColor: AppTheme.textSecondary,
              indicatorColor: AppTheme.primary,
              indicatorWeight: 2,
              labelStyle:
                  TextStyle(fontSize: 14, fontWeight: FontWeight.w500),
              tabs: [
                Tab(text: '用户管理'),
                Tab(text: '仓库管理'),
                Tab(text: '编号规则'),
                Tab(text: '系统参数'),
              ],
            ),
          ),
          const Divider(height: 1),
          Expanded(
            child: TabBarView(
              children: [
                _buildUsersTab(),
                _buildWarehousesTab(),
                _buildNumberRulesTab(),
                _buildSystemParamsTab(),
              ],
            ),
          ),
        ],
      ),
    );
  }

  Widget _buildUsersTab() {
    final asyncUsers = ref.watch(userListProvider);
    return Column(
      children: [
        Container(
          height: 52,
          color: AppTheme.surface,
          padding: const EdgeInsets.symmetric(horizontal: 12),
          child: Row(
            children: [
              ElevatedButton.icon(
                onPressed: () => _showAddUserDialog(context),
                icon: const Icon(Icons.person_add, size: 16),
                label: const Text('新增用户'),
              ),
            ],
          ),
        ),
        const Divider(height: 1),
        Expanded(
          child: asyncUsers.when(
            loading: () => const Center(child: CircularProgressIndicator()),
            error: (e, _) => Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Text('加载失败：$e',
                      style: const TextStyle(color: AppTheme.danger)),
                  const SizedBox(height: 12),
                  ElevatedButton(
                    onPressed: () => ref.read(userListProvider.notifier).reload(),
                    child: const Text('重试'),
                  ),
                ],
              ),
            ),
            data: (users) => SingleChildScrollView(
              child: DataTable(
                headingRowColor: WidgetStateProperty.all(const Color(0xFFF0F4FF)),
                columns: const [
                  DataColumn(label: Text('姓名')),
                  DataColumn(label: Text('用户名')),
                  DataColumn(label: Text('角色')),
                  DataColumn(label: Text('状态')),
                  DataColumn(label: Text('操作')),
                ],
                rows: users
                    .map((u) => DataRow(cells: [
                          DataCell(Row(
                            mainAxisSize: MainAxisSize.min,
                            children: [
                              CircleAvatar(
                                radius: 14,
                                backgroundColor:
                                    AppTheme.primary.withOpacity(0.15),
                                child: Text(
                                  (u.realName ?? u.username)
                                      .substring(0, 1),
                                  style: const TextStyle(
                                      fontSize: 12,
                                      color: AppTheme.primary,
                                      fontWeight: FontWeight.w600),
                                ),
                              ),
                              const SizedBox(width: 8),
                              Text(u.realName ?? u.username),
                            ],
                          )),
                          DataCell(Text(u.username,
                              style: const TextStyle(
                                  fontFamily: 'monospace', fontSize: 12))),
                          DataCell(_RoleBadge(u.roleLabel)),
                          DataCell(Switch(
                            value: u.isActive,
                            onChanged: (v) => ref
                                .read(userListProvider.notifier)
                                .updateUser(u.id, {'is_active': v}),
                            materialTapTargetSize:
                                MaterialTapTargetSize.shrinkWrap,
                          )),
                          DataCell(Row(
                            mainAxisSize: MainAxisSize.min,
                            children: [
                              TextButton(
                                onPressed: () =>
                                    _showEditUserDialog(context, u),
                                child: const Text('编辑',
                                    style: TextStyle(fontSize: 12)),
                              ),
                              TextButton(
                                onPressed: () =>
                                    _showResetPasswordDialog(context, u),
                                child: const Text('重置密码',
                                    style: TextStyle(fontSize: 12)),
                              ),
                            ],
                          )),
                        ]))
                    .toList(),
              ),
            ),
          ),
        ),
      ],
    );
  }

  Widget _buildWarehousesTab() {
    final asyncWarehouses = ref.watch(warehouseListProvider);
    return Column(
      children: [
        Container(
          height: 52,
          color: AppTheme.surface,
          padding: const EdgeInsets.symmetric(horizontal: 12),
          child: Row(
            children: [
              ElevatedButton.icon(
                onPressed: () => _showWarehouseDialog(context),
                icon: const Icon(Icons.add, size: 16),
                label: const Text('新建'),
              ),
            ],
          ),
        ),
        const Divider(height: 1),
        Expanded(
          child: asyncWarehouses.when(
            loading: () => const Center(child: CircularProgressIndicator()),
            error: (e, _) => Center(
              child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Text('加载失败：$e',
                      style: const TextStyle(color: AppTheme.danger)),
                  const SizedBox(height: 12),
                  ElevatedButton(
                    onPressed: () =>
                        ref.read(warehouseListProvider.notifier).reload(),
                    child: const Text('重试'),
                  ),
                ],
              ),
            ),
            data: (warehouses) {
              if (warehouses.isEmpty) {
                return const Center(
                    child: Text('暂无仓库',
                        style:
                            TextStyle(color: AppTheme.textSecondary)));
              }
              return SingleChildScrollView(
                child: DataTable(
                  headingRowColor:
                      WidgetStateProperty.all(const Color(0xFFF0F4FF)),
                  columns: const [
                    DataColumn(label: Text('仓库名称')),
                    DataColumn(label: Text('位置')),
                    DataColumn(label: Text('默认仓库')),
                    DataColumn(label: Text('操作')),
                  ],
                  rows: warehouses
                      .map((w) => DataRow(cells: [
                            DataCell(Text(w.name,
                                style: const TextStyle(
                                    fontWeight: FontWeight.w500))),
                            DataCell(Text(w.location ?? '-')),
                            DataCell(w.isDefault
                                ? const Icon(Icons.check_circle,
                                    color: AppTheme.success, size: 18)
                                : const SizedBox()),
                            DataCell(Row(
                              mainAxisSize: MainAxisSize.min,
                              children: [
                                TextButton(
                                  key: Key('btn_edit_${w.id}'),
                                  onPressed: () =>
                                      _showWarehouseDialog(context,
                                          warehouse: w),
                                  child: const Text('编辑',
                                      style: TextStyle(fontSize: 12)),
                                ),
                                TextButton(
                                  key: Key('btn_delete_${w.id}'),
                                  onPressed: () =>
                                      _confirmDeleteWarehouse(context, w),
                                  child: const Text('删除',
                                      style: TextStyle(
                                          fontSize: 12,
                                          color: AppTheme.danger)),
                                ),
                              ],
                            )),
                          ]))
                      .toList(),
                ),
              );
            },
          ),
        ),
      ],
    );
  }

  Future<void> _confirmDeleteWarehouse(
      BuildContext context, Warehouse w) async {
    final confirmed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('确认删除'),
        content: Text('确认删除仓库「${w.name}」？'),
        actions: [
          TextButton(
              onPressed: () => Navigator.of(ctx).pop(false),
              child: const Text('取消')),
          ElevatedButton(
            onPressed: () => Navigator.of(ctx).pop(true),
            style: ElevatedButton.styleFrom(
                backgroundColor: AppTheme.danger,
                foregroundColor: Colors.white),
            child: const Text('删除'),
          ),
        ],
      ),
    );
    if (confirmed == true && mounted) {
      try {
        await ref
            .read(warehouseListProvider.notifier)
            .deleteWarehouse(w.id);
        if (mounted) {
          ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
              content: Text('删除成功'),
              backgroundColor: AppTheme.success));
        }
      } catch (e) {
        if (mounted) {
          ScaffoldMessenger.of(context).showSnackBar(SnackBar(
              content: Text('删除失败：$e'),
              backgroundColor: AppTheme.danger));
        }
      }
    }
  }

  void _showWarehouseDialog(BuildContext context, {Warehouse? warehouse}) {
    showDialog(
      context: context,
      builder: (ctx) => _WarehouseFormDialog(
        warehouse: warehouse,
        onSaved: () =>
            ref.read(warehouseListProvider.notifier).reload(),
      ),
    );
  }

  Widget _buildNumberRulesTab() {
    final asyncRules = ref.watch(numberRuleListProvider);
    return asyncRules.when(
      loading: () => const Center(child: CircularProgressIndicator()),
      error: (e, _) => Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text('加载失败：$e',
                style: const TextStyle(color: AppTheme.danger)),
            const SizedBox(height: 12),
            ElevatedButton(
              onPressed: () =>
                  ref.read(numberRuleListProvider.notifier).reload(),
              child: const Text('重试'),
            ),
          ],
        ),
      ),
      data: (rules) => SingleChildScrollView(
        padding: const EdgeInsets.all(24),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const Text('编号规则配置',
                style:
                    TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
            const SizedBox(height: 4),
            const Text('配置各类单据的自动编号规则，修改后对新建单据生效',
                style: TextStyle(
                    fontSize: 13, color: AppTheme.textSecondary)),
            const SizedBox(height: 16),
            Card(
              child: DataTable(
                headingRowColor:
                    WidgetStateProperty.all(const Color(0xFFF0F4FF)),
                columns: const [
                  DataColumn(label: Text('单据类型')),
                  DataColumn(label: Text('前缀')),
                  DataColumn(label: Text('日期格式')),
                  DataColumn(label: Text('下一编号示例')),
                  DataColumn(label: Text('当前序号'), numeric: true),
                  DataColumn(label: Text('操作')),
                ],
                rows: rules
                    .map((r) => DataRow(cells: [
                          DataCell(Text(r.typeLabel,
                              style: const TextStyle(
                                  fontWeight: FontWeight.w500))),
                          DataCell(Container(
                            padding: const EdgeInsets.symmetric(
                                horizontal: 8, vertical: 2),
                            decoration: BoxDecoration(
                              color: AppTheme.primary.withOpacity(0.1),
                              borderRadius: BorderRadius.circular(3),
                            ),
                            child: Text(r.prefix,
                                style: const TextStyle(
                                    color: AppTheme.primary,
                                    fontFamily: 'monospace',
                                    fontSize: 13,
                                    fontWeight: FontWeight.w600)),
                          )),
                          DataCell(Text(r.dateFormat,
                              style: const TextStyle(
                                  fontSize: 12,
                                  color: AppTheme.textSecondary))),
                          DataCell(Text(r.exampleNo,
                              style: const TextStyle(
                                  fontFamily: 'monospace', fontSize: 12))),
                          DataCell(Text('${r.currentNo}')),
                          DataCell(TextButton(
                              onPressed: () =>
                                  _showNumberRuleDialog(context, r),
                              child: const Text('编辑',
                                  style: TextStyle(fontSize: 12)))),
                        ]))
                    .toList(),
              ),
            ),
          ],
        ),
      ),
    );
  }

  void _showNumberRuleDialog(BuildContext context, NumberRule rule) {
    final prefixCtrl = TextEditingController(text: rule.prefix);
    final currentNoCtrl =
        TextEditingController(text: '${rule.currentNo}');
    showDialog(
      context: context,
      builder: (ctx) => AlertDialog(
        title: Text('编辑编号规则 — ${rule.typeLabel}'),
        content: SizedBox(
          width: 360,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              TextField(
                controller: prefixCtrl,
                decoration: const InputDecoration(labelText: '前缀'),
              ),
              const SizedBox(height: 12),
              TextField(
                controller: currentNoCtrl,
                decoration: const InputDecoration(labelText: '当前序号'),
                keyboardType: TextInputType.number,
              ),
            ],
          ),
        ),
        actions: [
          TextButton(
              onPressed: () => Navigator.of(ctx).pop(),
              child: const Text('取消')),
          ElevatedButton(
            onPressed: () async {
              Navigator.of(ctx).pop();
              try {
                await ref
                    .read(numberRuleListProvider.notifier)
                    .updateRule(rule.id, {
                  'prefix': prefixCtrl.text.trim(),
                  'current_no': int.tryParse(currentNoCtrl.text) ?? rule.currentNo,
                });
                if (context.mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    const SnackBar(
                        content: Text('编号规则已更新'),
                        backgroundColor: AppTheme.success),
                  );
                }
              } catch (e) {
                if (context.mounted) {
                  ScaffoldMessenger.of(context).showSnackBar(
                    SnackBar(
                        content: Text('更新失败：$e'),
                        backgroundColor: AppTheme.danger),
                  );
                }
              }
            },
            child: const Text('保存'),
          ),
        ],
      ),
    );
  }

  Widget _buildSystemParamsTab() {
    return SingleChildScrollView(
      padding: const EdgeInsets.all(24),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          const Text('系统参数',
              style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
          const SizedBox(height: 16),
          Card(
            child: Padding(
              padding: const EdgeInsets.all(20),
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  const Text('基本设置',
                      style: TextStyle(fontSize: 14, fontWeight: FontWeight.w600, color: AppTheme.primaryDark)),
                  const Divider(height: 24),
                  _ParamRow(label: '系统名称', value: '酒库管理系统'),
                  _ParamRow(label: '货币单位', value: '人民币（CNY）'),
                  _ParamRow(label: '日期格式', value: 'YYYY-MM-DD'),
                  _ParamRow(label: '时区', value: 'Asia/Shanghai (UTC+8)'),
                  const SizedBox(height: 16),
                  const Text('审核设置',
                      style: TextStyle(fontSize: 14, fontWeight: FontWeight.w600, color: AppTheme.primaryDark)),
                  const Divider(height: 24),
                  _ParamRow(label: '入库单需要审核', value: '是', isSwitch: true),
                  _ParamRow(label: '出库单需要审核', value: '是', isSwitch: true),
                  _ParamRow(label: '允许超量出库', value: '否', isSwitch: false),
                ],
              ),
            ),
          ),
          const SizedBox(height: 12),
          Row(
            children: [
              ElevatedButton(
                onPressed: () {},
                child: const Text('保存设置'),
              ),
              const SizedBox(width: 8),
              OutlinedButton(
                onPressed: () {},
                child: const Text('重置默认'),
              ),
            ],
          ),
        ],
      ),
    );
  }

  void _showAddUserDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (ctx) => _UserFormDialog(
        onSaved: () => ref.read(userListProvider.notifier).reload(),
      ),
    );
  }

  void _showEditUserDialog(BuildContext context, AppUser user) {
    showDialog(
      context: context,
      builder: (ctx) => _UserFormDialog(
        user: user,
        onSaved: () => ref.read(userListProvider.notifier).reload(),
      ),
    );
  }

  void _showResetPasswordDialog(BuildContext context, AppUser user) {
    showDialog(
      context: context,
      builder: (ctx) => _ResetPasswordDialog(user: user),
    );
  }
}

class _WarehouseFormDialog extends ConsumerStatefulWidget {
  final Warehouse? warehouse;
  final VoidCallback onSaved;

  const _WarehouseFormDialog({this.warehouse, required this.onSaved});

  @override
  ConsumerState<_WarehouseFormDialog> createState() =>
      _WarehouseFormDialogState();
}

class _WarehouseFormDialogState extends ConsumerState<_WarehouseFormDialog> {
  final _formKey = GlobalKey<FormState>();
  late final TextEditingController _nameCtrl;
  late final TextEditingController _locationCtrl;
  late bool _isDefault;
  bool _saving = false;

  @override
  void initState() {
    super.initState();
    _nameCtrl = TextEditingController(text: widget.warehouse?.name ?? '');
    _locationCtrl =
        TextEditingController(text: widget.warehouse?.location ?? '');
    _isDefault = widget.warehouse?.isDefault ?? false;
  }

  @override
  void dispose() {
    _nameCtrl.dispose();
    _locationCtrl.dispose();
    super.dispose();
  }

  Future<void> _save() async {
    if (!_formKey.currentState!.validate()) return;
    setState(() => _saving = true);
    final data = {
      'name': _nameCtrl.text.trim(),
      if (_locationCtrl.text.trim().isNotEmpty)
        'location': _locationCtrl.text.trim(),
      'is_default': _isDefault,
    };
    try {
      final notifier = ref.read(warehouseListProvider.notifier);
      if (widget.warehouse != null) {
        await notifier.updateWarehouse(widget.warehouse!.id, data);
      } else {
        await notifier.createWarehouse(data);
      }
      if (mounted) {
        Navigator.of(context).pop();
        widget.onSaved();
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text(
                widget.warehouse != null ? '仓库更新成功' : '仓库创建成功'),
            backgroundColor: AppTheme.success,
          ),
        );
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
              content: Text('保存失败：$e'),
              backgroundColor: AppTheme.danger),
        );
      }
    } finally {
      if (mounted) setState(() => _saving = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text(widget.warehouse != null ? '编辑仓库' : '新建仓库'),
      content: SizedBox(
        width: 400,
        child: Form(
          key: _formKey,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              TextFormField(
                controller: _nameCtrl,
                decoration: const InputDecoration(labelText: '仓库名称'),
                validator: (v) =>
                    (v == null || v.isEmpty) ? '不能为空' : null,
              ),
              const SizedBox(height: 12),
              TextFormField(
                controller: _locationCtrl,
                decoration: const InputDecoration(labelText: '位置'),
              ),
              const SizedBox(height: 12),
              CheckboxListTile(
                title: const Text('设为默认仓库'),
                value: _isDefault,
                onChanged: (v) => setState(() => _isDefault = v ?? false),
                contentPadding: EdgeInsets.zero,
              ),
            ],
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: const Text('取消'),
        ),
        ElevatedButton(
          onPressed: _saving ? null : _save,
          child: _saving
              ? const SizedBox(
                  width: 16,
                  height: 16,
                  child: CircularProgressIndicator(
                      strokeWidth: 2, color: Colors.white))
              : const Text('保存'),
        ),
      ],
    );
  }
}

// ── 新增/编辑用户弹窗 ─────────────────────────────────────
class _UserFormDialog extends ConsumerStatefulWidget {
  final AppUser? user;
  final VoidCallback onSaved;
  const _UserFormDialog({this.user, required this.onSaved});

  @override
  ConsumerState<_UserFormDialog> createState() => _UserFormDialogState();
}

class _UserFormDialogState extends ConsumerState<_UserFormDialog> {
  final _formKey = GlobalKey<FormState>();
  late final TextEditingController _usernameCtrl;
  late final TextEditingController _realNameCtrl;
  late final TextEditingController _phoneCtrl;
  late final TextEditingController _passwordCtrl;
  late String _role;
  bool _saving = false;

  bool get _isEdit => widget.user != null;

  @override
  void initState() {
    super.initState();
    _usernameCtrl = TextEditingController(text: widget.user?.username ?? '');
    _realNameCtrl = TextEditingController(text: widget.user?.realName ?? '');
    _phoneCtrl = TextEditingController(text: widget.user?.phone ?? '');
    _passwordCtrl = TextEditingController();
    _role = widget.user?.role ?? 'operator';
  }

  @override
  void dispose() {
    _usernameCtrl.dispose();
    _realNameCtrl.dispose();
    _phoneCtrl.dispose();
    _passwordCtrl.dispose();
    super.dispose();
  }

  Future<void> _save() async {
    if (!_formKey.currentState!.validate()) return;
    setState(() => _saving = true);
    try {
      final notifier = ref.read(userListProvider.notifier);
      if (_isEdit) {
        await notifier.updateUser(widget.user!.id, {
          'real_name': _realNameCtrl.text.trim(),
          'phone': _phoneCtrl.text.trim(),
          'role': _role,
        });
      } else {
        await notifier.createUser({
          'username': _usernameCtrl.text.trim(),
          'password': _passwordCtrl.text,
          'real_name': _realNameCtrl.text.trim(),
          'phone': _phoneCtrl.text.trim(),
          'role': _role,
        });
      }
      if (mounted) {
        Navigator.of(context).pop();
        widget.onSaved();
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
          content: Text(_isEdit ? '用户更新成功' : '用户创建成功'),
          backgroundColor: AppTheme.success,
        ));
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
          content: Text('保存失败：$e'),
          backgroundColor: AppTheme.danger,
        ));
      }
    } finally {
      if (mounted) setState(() => _saving = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text(_isEdit ? '编辑用户' : '新增用户'),
      content: SizedBox(
        width: 400,
        child: Form(
          key: _formKey,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              if (!_isEdit)
                TextFormField(
                  controller: _usernameCtrl,
                  decoration: const InputDecoration(labelText: '用户名'),
                  validator: (v) => (v == null || v.isEmpty) ? '不能为空' : null,
                ),
              if (!_isEdit) const SizedBox(height: 12),
              TextFormField(
                controller: _realNameCtrl,
                decoration: const InputDecoration(labelText: '姓名'),
              ),
              const SizedBox(height: 12),
              TextFormField(
                controller: _phoneCtrl,
                decoration: const InputDecoration(labelText: '手机号'),
              ),
              const SizedBox(height: 12),
              if (!_isEdit) ...[
                TextFormField(
                  controller: _passwordCtrl,
                  obscureText: true,
                  decoration: const InputDecoration(labelText: '初始密码'),
                  validator: (v) => (v == null || v.isEmpty) ? '不能为空' : null,
                ),
                const SizedBox(height: 12),
              ],
              DropdownButtonFormField<String>(
                value: _role,
                items: const [
                  DropdownMenuItem(value: 'admin', child: Text('管理员')),
                  DropdownMenuItem(value: 'operator', child: Text('操作员')),
                  DropdownMenuItem(value: 'readonly', child: Text('只读')),
                ],
                onChanged: (v) => setState(() => _role = v ?? 'operator'),
                decoration: const InputDecoration(labelText: '角色'),
              ),
            ],
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: const Text('取消'),
        ),
        ElevatedButton(
          onPressed: _saving ? null : _save,
          child: _saving
              ? const SizedBox(
                  width: 16, height: 16,
                  child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white))
              : const Text('保存'),
        ),
      ],
    );
  }
}

// ── 重置密码弹窗 ──────────────────────────────────────────
class _ResetPasswordDialog extends ConsumerStatefulWidget {
  final AppUser user;
  const _ResetPasswordDialog({required this.user});

  @override
  ConsumerState<_ResetPasswordDialog> createState() => _ResetPasswordDialogState();
}

class _ResetPasswordDialogState extends ConsumerState<_ResetPasswordDialog> {
  final _ctrl = TextEditingController();
  bool _saving = false;

  @override
  void dispose() {
    _ctrl.dispose();
    super.dispose();
  }

  Future<void> _save() async {
    if (_ctrl.text.isEmpty) return;
    setState(() => _saving = true);
    try {
      await ref.read(userListProvider.notifier).resetPassword(widget.user.id, _ctrl.text);
      if (mounted) {
        Navigator.of(context).pop();
        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
          content: Text('密码已重置'),
          backgroundColor: AppTheme.success,
        ));
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(SnackBar(
          content: Text('重置失败：$e'),
          backgroundColor: AppTheme.danger,
        ));
      }
    } finally {
      if (mounted) setState(() => _saving = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return AlertDialog(
      title: Text('重置密码 — ${widget.user.username}'),
      content: SizedBox(
        width: 360,
        child: TextField(
          controller: _ctrl,
          obscureText: true,
          decoration: const InputDecoration(labelText: '新密码'),
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.of(context).pop(),
          child: const Text('取消'),
        ),
        ElevatedButton(
          onPressed: _saving ? null : _save,
          child: _saving
              ? const SizedBox(
                  width: 16, height: 16,
                  child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white))
              : const Text('确认重置'),
        ),
      ],
    );
  }
}

class _RoleBadge extends StatelessWidget {
  final String role;
  const _RoleBadge(this.role);

  @override
  Widget build(BuildContext context) {
    final Color bg;
    final Color fg;
    switch (role) {
      case '管理员':
        bg = const Color(0xFFE3F2FD);
        fg = AppTheme.primary;
        break;
      case '操作员':
        bg = const Color(0xFFE8F5E9);
        fg = AppTheme.success;
        break;
      default:
        bg = const Color(0xFFF5F5F5);
        fg = AppTheme.textSecondary;
    }
    return Container(
      padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 2),
      decoration: BoxDecoration(color: bg, borderRadius: BorderRadius.circular(3)),
      child: Text(role, style: TextStyle(color: fg, fontSize: 12, fontWeight: FontWeight.w500)),
    );
  }
}

class _ParamRow extends StatelessWidget {
  final String label;
  final String value;
  final bool? isSwitch;

  const _ParamRow({required this.label, required this.value, this.isSwitch});

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.symmetric(vertical: 8),
      child: Row(
        children: [
          SizedBox(
            width: 180,
            child: Text(label,
                style: const TextStyle(fontSize: 14, color: AppTheme.textSecondary)),
          ),
          if (isSwitch != null)
            Switch(
              value: isSwitch!,
              onChanged: (_) {},
              materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
            )
          else
            Text(value,
                style: const TextStyle(fontSize: 14, fontWeight: FontWeight.w500)),
          const Spacer(),
          TextButton(onPressed: () {}, child: const Text('修改', style: TextStyle(fontSize: 12))),
        ],
      ),
    );
  }
}