import 'dart:async';
import 'dart:io';

import 'package:eitc_erm_app/bean/normal_response.dart';
import 'package:eitc_erm_app/utils/Component.dart';
import 'package:eitc_erm_app/utils/Constants.dart';
import 'package:eitc_erm_app/utils/logger.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:http/http.dart' as http;
import 'package:http/http.dart';

import 'login.dart';

class ChangePasswordPage extends StatefulWidget {
  @override
  _ChangePasswordPageState createState() => _ChangePasswordPageState();
}

class _ChangePasswordPageState extends State<ChangePasswordPage> {
  final _formKey = GlobalKey<FormState>();
  String phoneNo = '';
  String _newPassword = '';
  String _confirmPassword = '';
  bool _isLoading = false;
  bool isButtonEnable = true;
  int count = 60;
  Timer? timer;
  String buttonText = '发送验证码';
  TextEditingController mController = TextEditingController();

  void _buttonClickListen() {
    setState(() {
      sendCaptchaCode();
      if (isButtonEnable) {
        //当按钮可点击时
        isButtonEnable = false; //按钮状态标记
        _initTimer();
        return null; //返回null按钮禁止点击
      } else {
        //当按钮不可点击时
//  logd('false');
        return null; //返回null按钮禁止点击
      }
    });
  }

  void _initTimer() {
    timer = Timer.periodic(const Duration(seconds: 1), (Timer timer) {
      count--;
      setState(() {
        if (count == 0) {
          timer.cancel(); //倒计时结束取消定时器
          isButtonEnable = true; //按钮可点击
          count = 60; //重置时间
          buttonText = '发送验证码'; //重置按钮文本
        } else {
          buttonText = '重新发送($count)'; //更新文本内容
        }
      });
    });
  }

  @override
  void dispose() {
    timer?.cancel();
    super.dispose();
  }

  ///检查验证码
  Future<bool> _checkCaptchaCode() async {
    Map<String, dynamic> params = {
      "phoneNumber": Global.loginPhoneNo,
      "captchaCode": mController.text
    };
    Uri uri = Uri.parse("${Global.BaseUrl}api/checkCaptchaCode");
    logd("检查验证码,uri=$uri");
    Response response =
        await http.post(uri, body: encodeBody(params), headers: jsonHeaders());
    if (response.statusCode == 200) {
      final json = decodeBodyToJson(response.bodyBytes);
      logd("检查验证码结果$json");
      NormalResponse mNormalResponse = NormalResponse.fromJson(json);
      return mNormalResponse.code == 200;
    } else {
      logd("检查验证码异常${response.body}");
    }
    return false;
  }

  Future<void> _changePassword(
      {required String newPassword, required String phoneNo}) async {
    bool bo = await _checkCaptchaCode();
    if (!bo) {
      Component.toast("验证码错误！", 0);
      return;
    }

    var params = {
      'phoneNumber': phoneNo,
      'password': newPassword,
      'confirmPassword': newPassword,
      'captchaCode': mController.text,
    };
    final response =
        await http.post(Uri.parse('${Global.BaseUrl}user/setPassword'),
            headers: jsonHeaders(withToken: true),
            body: encodeBody(params));
    setState(() {
      _isLoading = true;
    });
    try {
      final json = decodeBodyToJson(response.bodyBytes);
      logd("修改密码结果=$json");
      NormalResponse mNormalResponse = new NormalResponse.fromJson(json);
      if (mNormalResponse.code == Global.responseSuccessCode) {
        Component.toast("密码修改成功！", 2);
        Navigator.of(context).pop();
        Navigator.pushReplacement(
          context,
          MaterialPageRoute(builder: (context) => Login()),
        );
      } else {
        Component.toast(mNormalResponse.msg.toString(), 0);
      }
    } catch (e) {
      Component.toast("异常: $e", 0);
    } finally {
      setState(() {
        _isLoading = false;
      });
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('修改密码',
            style: TextStyle(
              color: Colors.white,
            )),
        centerTitle: true,
        elevation: 0.5,
        backgroundColor: Global.StatusBarColor,
        leading: IconButton(
          tooltip: '返回上一页',
          icon: const Icon(
            Icons.arrow_back_ios,
            color: Colors.white,
          ),
          onPressed: () {
            Navigator.of(context).pop();
            //_nextPage(-1);
          },
        ),
      ),
      body: SingleChildScrollView(
        child: Form(
          key: _formKey,
          child: Padding(
            padding: const EdgeInsets.all(20.0),
            child: Column(
              children: <Widget>[
                const SizedBox(height: 30.0),
                TextFormField(
                  enabled: false,
                  decoration: const InputDecoration(
                    labelText: '手机号',
                  ),
                  initialValue: Global.loginPhoneNo,
                  onSaved: (value) => phoneNo = value!,
                ),
                TextFormField(
                  decoration: const InputDecoration(labelText: '新密码'),
                  obscureText: true,
                  onSaved: (value) => _newPassword = value!,
                ),
                TextFormField(
                  decoration: const InputDecoration(labelText: '确认新密码'),
                  obscureText: true,
                  onSaved: (value) => _confirmPassword = value!,
                ),
                Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  crossAxisAlignment: CrossAxisAlignment.baseline,
                  textBaseline: TextBaseline.alphabetic,
                  children: <Widget>[
                    Expanded(
                      child: Padding(
                        padding:
                            const EdgeInsets.only(left: 0, right: 15, top: 15),
                        child: TextFormField(
                          maxLines: 1,
                          onSaved: (value) {},
                          controller: mController,
                          textAlign: TextAlign.left,
                          inputFormatters: [
                            FilteringTextInputFormatter.digitsOnly,
                            LengthLimitingTextInputFormatter(6)
                          ],
                          decoration: const InputDecoration(
                            hintText: ('请输入验证码'),
                            contentPadding: EdgeInsets.only(top: -5, bottom: 0),
                            alignLabelWithHint: true,
                            // border:
                            // OutlineInputBorder(borderSide: BorderSide.none),
                          ),
                        ),
                      ),
                    ),
                    Container(
                      padding: const EdgeInsets.all(0),
                      width: 120,
                      child: ElevatedButton(
                        style: ButtonStyle(
                          backgroundColor:
                              WidgetStateProperty.resolveWith<Color>((states) {
                            return Colors.blue; // Regular color
                          }),
                          foregroundColor:
                              WidgetStateProperty.all(Colors.white),
                        ),
                        // backgroundColor  : isButtonEnable
                        //     ? Color(0xff44c5fe)
                        //     : Colors.grey.withOpacity(0.1), //按钮的颜色
                        // splashColor: isButtonEnable
                        //     ? Colors.white.withOpacity(0.1)
                        //     : Colors.transparent,
                        // shape: StadiumBorder(side: BorderSide.none),
                        onPressed: () {
                          setState(() {
                            _buttonClickListen();
                          });
                        },
                        child: Text(
                          buttonText,
                          style: TextStyle(
                            fontSize: 12,
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
                Container(
                  width: double.infinity,
                  height: 45,
                  margin: EdgeInsets.only(top: 40, left: 10, right: 10),
                  child: ElevatedButton(
                    style: ButtonStyle(
                      backgroundColor:
                          MaterialStateProperty.resolveWith<Color>((states) {
                        return Colors.blue; // Regular color
                      }),
                    ),
                    child: _isLoading
                        ? CircularProgressIndicator(
                            valueColor:
                                AlwaysStoppedAnimation<Color>(Colors.white),
                          )
                        : Text(
                            '修改密码',
                            style: TextStyle(color: Colors.white, fontSize: 15),
                          ),
                    onPressed: _isLoading
                        ? null
                        : () {
                            if (_formKey.currentState!.validate()) {
                              _formKey.currentState?.save();
                              if (_newPassword != _confirmPassword) {
                                Component.toast("两次密码输入不一致", 0);
                                return;
                              }
                              _changePassword(
                                phoneNo: phoneNo,
                                newPassword: _newPassword,
                              );
                            }
                          },
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }

  Future<String?> sendCaptchaCode() async {
    var params = {
      'phoneNumber': Global.loginPhoneNo,
    };
    var response = await http.post(
        Uri.parse('${Global.BaseUrl}sendCaptchaCode'),
        body: encodeBody(params),
        headers: jsonHeaders());

    if (response.statusCode == 200) {
      final json = decodeBodyToJson(response.bodyBytes);
      logd("发送验证码结果=$json");
      NormalResponse mNormalResponse = new NormalResponse.fromJson(json);
      if (mNormalResponse.code == Global.responseSuccessCode) {
        Component.toast("短信发送成功，请查收！", 2);
      } else {
        Component.toast(mNormalResponse.msg.toString(), 0);
      }
      return response.toString();
    } else {
      Component.toast("出错了，请稍后再试！", 0);
      return null;
    }
  }
}