import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:qhd_prevention/customWidget/custom_button.dart';
import 'package:qhd_prevention/pages/my_appbar.dart';

import 'package:flutter/material.dart';
import 'package:qhd_prevention/tools/h_colors.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../../http/ApiService.dart';
import '../login_page.dart';

class MineSetPwdPage extends StatefulWidget {
  const MineSetPwdPage({super.key});

  @override
  State<MineSetPwdPage> createState() => _MineSetPwdPageState();
}

class _MineSetPwdPageState extends State<MineSetPwdPage> {
  final _oldPwdController = TextEditingController();
  final _newPwdController = TextEditingController();
  final _confirmPwdController = TextEditingController();

  @override
  void dispose() {
    _oldPwdController.dispose();
    _newPwdController.dispose();
    _confirmPwdController.dispose();
    super.dispose();
  }

  void _handleSubmit() {
    final oldPwd = _oldPwdController.text.trim();
    final newPwd = _newPwdController.text.trim();
    final confirmPwd = _confirmPwdController.text.trim();

    if (oldPwd.isEmpty || newPwd.isEmpty || confirmPwd.isEmpty) {
      _showMessage('请填写完整所有字段');
      return;
    }

    if (newPwd != confirmPwd) {
      _showMessage('新密码与确认密码不一致');
      return;
    }

    final RegExp regex = RegExp(r'^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[a-zA-Z\d]{6,18}$');
    if (regex.hasMatch(newPwd)) {
    _showMessage('密码长度为6-18位，必须包含大小字母，小写字母数字和特殊符号。');
    return;
    }

    // 示例验证：密码复杂度（实际可用正则加强）
    if (newPwd.length < 8 || newPwd.length > 18) {
      _showMessage('密码长度需在8-18位之间');
      return;
    }



    _changePass(oldPwd,newPwd);


  }

  void _showMessage(String msg) {
    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(msg)));
  }

  Widget _buildPwdField(String hintText, TextEditingController controller) {
    return Column(
      children: [
        TextField(
          controller: controller,
          obscureText: true,
          decoration: InputDecoration(
            hintText: hintText,
            border: InputBorder.none,
            contentPadding: const EdgeInsets.symmetric(vertical: 10),
          ),
        ),
        const Divider(height: 1, color: Colors.grey),
      ],
    );
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: MyAppbar(title: '修改密码'),
      body: SafeArea(
        child: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 20),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Text(
                '修改密码',
                style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
              ),
              const SizedBox(height: 30),
              _buildPwdField('旧密码', _oldPwdController),
              const SizedBox(height: 20),
              _buildPwdField('新密码', _newPwdController),
              const SizedBox(height: 20),
              _buildPwdField('确认新密码', _confirmPwdController),
              const SizedBox(height: 15),
              const Text(
                '需8-18位字母大小写、数字、字符混合',
                style: TextStyle(color: Colors.grey, fontSize: 13),
              ),
              const SizedBox(height: 30,),
              SizedBox(
                width: double.infinity,
                height: 48,
                child: CustomButton(
                  onPressed: () {
                    _handleSubmit();
                  },
                    text: "提交", backgroundColor: Colors.blue),
              ),
            ],
          ),
        ),
      ),
    );
  }


  Future<void> _changePass(String oldPwd, String newPwd) async {
    try {
      // “我的工作” 数量
      final raw = await ApiService.changePassWord(oldPwd, newPwd);

      // final hidCount = raw['hidCount'] as Map<String, dynamic>;
      // print(hidCount);
      if (raw['result'] == 'success') {
        _showMessage('密码修改成功'); // 这里换成实际调用接口逻辑
        Navigator.pop(context,true);

        // 清除用户登录状态
        await _clearUserSession();
        // 跳转到登录页并清除所有历史路由
        Navigator.pushAndRemoveUntil(
          context,
          MaterialPageRoute(builder: (context) => LoginPage()),
              (Route<dynamic> route) => false, // 移除所有历史路由
        );

      }else{
        _showMessage('密码修改失败');
      }

    } catch (e) {
      // 出错时可以 Toast 或者在页面上显示错误状态
      print('加载首页数据失败：$e');
      _showMessage('密码修改失败');
    }
  }

  Future<void> _clearUserSession() async {
    final prefs = await SharedPreferences.getInstance();
    await prefs.remove('isLoggedIn');     // 清除登录状态
  }

}