import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_keyboard_visibility/flutter_keyboard_visibility.dart';
import 'package:lszlgl/base/base_state.dart';
import 'package:lszlgl/main.dart';
import 'package:lszlgl/network/my_api.dart';
import 'package:lszlgl/widget/button.dart';
import 'package:lszlgl/widget/password_textfield.dart';

/// 修改密码
class ChangePwdPage extends StatefulWidget {
  final bool startHome;

  const ChangePwdPage({
    Key? key,
    bool? startHome,
  })  : startHome = startHome ?? false,
        super(key: key);

  @override
  State<ChangePwdPage> createState() => _ChangePwdPageState();
}

class _ChangePwdPageState extends BaseState<ChangePwdPage> {
  late TextEditingController oldPwdCtrl;
  late TextEditingController newPwdCtrl;
  late TextEditingController confirmPwdCtrl;
  final ValueNotifier<String?> oldError = null.notifier();
  final ValueNotifier<String?> newError = null.notifier();
  final ValueNotifier<String?> confirmError = null.notifier();

  void onChange() async {
    List<bool> verifyList = await Future.wait([verifyOldText(), verifyNewText(), verifyConfirmText()]);
    if (!verifyList.firstWhere((element) => !element, orElse: () => true)) {
      return;
    }
    MyNavigator.showLoading(msg: '密码修改中...');
    try {
      var rsp = await MyApi.get().updatePassword({
        'oldPassword': oldPwdCtrl.text,
        'newPassword': newPwdCtrl.text,
      });
      if (rsp.data ?? false) {
        MyNavigator.showToast('修改成功');
        if (widget.startHome) {
          // 进入主页
          MyRouter.startMain(popAll: true);
        } else {
          MyNavigator.pop();
        }
      }
    } catch (e) {
      logger.e(e);
    }
    MyNavigator.dismissLoading();
  }

  Future<bool> verifyOldText() async {
    var text = oldPwdCtrl.text;
    if (text.isEmpty) {
      oldError.value = '请输入旧密码';
      return false;
    }
    int length = text.length;
    if (length < 8) {
      oldError.value = '密码长度要大于8位';
      return false;
    }
    oldError.value = null;
    return true;
  }

  Future<bool> verifyNewText() async {
    var text = newPwdCtrl.text;
    if (text.isEmpty) {
      newError.value = '请输入新密码';
      return false;
    }
    int length = text.length;
    if (length < 8) {
      newError.value = '密码长度要大于8位';
      return false;
    }
    var regex = RegExp(r'\d');
    if (!regex.hasMatch(text)) {
      newError.value = '密码要包含数字';
      return false;
    }
    regex = RegExp(r'[a-zA-Z]');
    if (!regex.hasMatch(text)) {
      newError.value = '密码要包含大写字母或小写字母';
      return false;
    }
    regex = RegExp(r'[!\"#$%&()*+,-./:;<=>?@\]\[^_`{|}~]');
    if (!regex.hasMatch(text)) {
      newError.value = '密码要包含特殊字符';
      return false;
    }
    newError.value = null;
    return true;
  }

  Future<bool> verifyConfirmText() async {
    var text = confirmPwdCtrl.text;
    if (text.isEmpty) {
      confirmError.value = '请输入确认密码';
      return false;
    }
    if (text != newPwdCtrl.text) {
      confirmError.value = '两次输入密码不一致';
      return false;
    }
    confirmError.value = null;
    return true;
  }

  @override
  void initState() {
    super.initState();
    oldPwdCtrl = TextEditingController();
    newPwdCtrl = TextEditingController();
    confirmPwdCtrl = TextEditingController();
  }

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

  @override
  Widget build(BuildContext context) {
    return myScaffold(
      child: KeyboardDismissOnTap(
        dismissOnCapturedTaps: true,
        child: buildBody(),
      ),
    );
  }

  Widget buildBody() {
    return Column(
      children: [
        myAppBar(title: '修改密码'),
        Expanded(
          child: SingleChildScrollView(
            child: Column(
              children: [
                buildList(),
                const SizedBox(height: 32),
                const Text('密码长度8-20位，需包含英文、数字及字符',style: TextStyle(color: Colors.grey),),
                const SizedBox(height: 12),
                MyButton(
                  '保 存',
                  onTap: onChange,
                  gradient: const LinearGradient(colors: [Color(0xFF3BD2E5), Color(0xFF247AF8)]),
                  radius: 10,
                  fountSize: 18,
                  fontWeight: FontWeight.w600,
                  margin: const EdgeInsets.symmetric(horizontal: 12),
                ),
              ],
            ),
          ),
        ),

      ],
    );
  }

  Widget buildList() {
    var formatters = [FilteringTextInputFormatter.allow(RegExp(r'[a-zA-Z0-9!\"#$%&()*+,-./:;<=>?@\]\[^_`{|}~]'))];
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 12),
      padding: const EdgeInsets.fromLTRB(16, 12, 16, 12),
      clipBehavior: Clip.hardEdge,
      decoration: const BoxDecoration(
        borderRadius: BorderRadius.all(Radius.circular(10)),
        color: Colors.white,
      ),
      child: Column(
        children: [
          oldError.builder(
            (error) => buildEdit(
              titleName: '旧密码',
              ctrl: oldPwdCtrl,
              hint: '请填写旧密码',
              formatters: formatters,
              inputType: TextInputType.visiblePassword,
              obscureText: true,
              errorText: error,
              onChanged: (value) => verifyOldText(),
            ),
          ),
          const SizedBox(height: 12),
          newError.builder(
            (error) => buildEdit(
              titleName: '新密码',
              ctrl: newPwdCtrl,
              hint: '请输入新的密码',
              formatters: formatters,
              inputType: TextInputType.visiblePassword,
              obscureText: true,
              onChanged: (value) => verifyNewText(),
              errorText: error,
            ),
          ),
          const SizedBox(height: 12),
          confirmError.builder(
            (error) => buildEdit(
              titleName: '新密码',
              ctrl: confirmPwdCtrl,
              hint: '请再次输入新的密码',
              formatters: formatters,
              inputType: TextInputType.visiblePassword,
              obscureText: true,
              onChanged: (value) => verifyConfirmText(),
              errorText: error,
            ),
          ),
        ],
      ),
    );
  }

  Widget buildEdit({
    required TextEditingController ctrl,
    required String titleName,
    String? hint,
    TextInputAction action = TextInputAction.next,
    bool obscureText = false,
    ValueChanged? onSubmit,
    ValueChanged<String>? onChanged,
    List<TextInputFormatter>? formatters,
    int? maxLength,
    String? errorText,
    TextInputType? inputType,
  }) {
    return PasswordTextField(
      controller: ctrl,
      textAlign: TextAlign.end,
      decoration: InputDecoration(
        prefixIcon: Padding(
          padding: const EdgeInsets.symmetric(horizontal: 8.0),
          child: Text(titleName),
        ),
        prefixIconConstraints: const BoxConstraints(),
        border: const UnderlineInputBorder(
          borderSide: BorderSide(width: 1,color: Color(0xffF6F6F8))
        ),
        enabledBorder: const UnderlineInputBorder(
            borderSide: BorderSide(width: 1,color: Color(0xffF6F6F8))
        ),
        focusedBorder: const UnderlineInputBorder(
            borderSide: BorderSide(width: 1,color: Color(0xffF6F6F8))
        ),
        hintText: hint,
        hintStyle: const TextStyle(color: Color(0xFFBBBBBB)),
        isDense: true,
        contentPadding: const EdgeInsets.symmetric(horizontal: 20, vertical: 12),
        errorText: errorText,
      ),
      maxLength: maxLength,
      style: const TextStyle(fontSize: 14),
      textInputAction: action,
      initialObscurity: obscureText,
      onSubmitted: onSubmit,
      onChanged: onChanged,
      inputFormatters: formatters,
    );
  }
}