import 'dart:async';

import 'package:ctjt_flutter/common/styles.dart';
import 'package:ctjt_flutter/common/utils.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';

import 'button.dart';

/* ---------------------------------密码输入框-------------------------------- */
class PWDInputGroup extends StatelessWidget {
  static var _defaultPadding = EdgeInsets.only(top: 75.h);

  PWDInputGroup(
      {Key? key,
      this.label = '密码:',
      this.padding,
      required this.controller})
      : super(key: key);

  final String label;
  final EdgeInsetsGeometry? padding;
  final TextEditingController controller;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: null == this.padding ? _defaultPadding : this.padding!,
      child: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(this.label, style: Styles.formLabelStyle),
          PWDInput(
            controller: this.controller,
          )
        ],
      ),
    );
  }
}

class PWDInput extends StatefulWidget {
  PWDInput({
    Key? key,
    this.hintText = '6-16位数字、字母或符号',
    this.minLength = 6,
    this.maxLength = 16,
    required this.controller
  }) : super(key: key);

  final hintText;
  final minLength;
  final maxLength;
  final TextEditingController controller;

  @override
  _PWDInputState createState() => _PWDInputState();
}

class _PWDInputState extends State<PWDInput> {
  var _isCanSee = false;
  var _hideClear = true;

  @override
  Widget build(BuildContext context) {
    return TextFormField(
      controller: widget.controller,
      decoration: InputDecoration(
        // 用于设置文本框右侧按钮的装饰器
        hintText: widget.hintText,
        suffixIcon: SizedBox(
          // 设置按钮区域宽度
          width: Styles.iconSize! * 4.0,
          child: Row(
            // 水平布局
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              Expanded(
                // 撑满剩余水平空间的布局容器
                child: Offstage(
                  // 显示隐藏控制
                  offstage: _hideClear,
                  child: IButton(
                      // 文本框清理按钮
                      iconSize: Styles.iconSize!,
                      icon: Icon(Icons.cancel, color: Styles.primaryColor),
                      onPressed: () {
                        widget.controller.clear();
                        setState(() {
                          _hideClear = true;
                        });
                      }),
                ),
              ),
              IButton(
                  // 查看密码按钮
                  iconSize: Styles.iconSize!,
                  icon: _isCanSee
                      ? Icon(Icons.visibility, color: Styles.primaryColor)
                      : Icon(Icons.visibility_off, color: Colors.black54),
                  onPressed: () {
                    setState(() {
                      _isCanSee = !_isCanSee;
                    });
                  }),
            ],
          ),
        ),
      ),
      maxLength: widget.maxLength,
      validator: (value) {
        // 校验
        return value!.isEmpty || value.length > widget.maxLength || value.length < widget.minLength
            ? '请输入由${widget.hintText}组成的密码'
            : null;
      },
      // 密码键盘
      keyboardType: TextInputType.visiblePassword,
      // 允许输入的字符
      inputFormatters: [
        FilteringTextInputFormatter.allow(Utils.passwordPattern)
      ],
      // 密码是否可见
      obscureText: !_isCanSee,
      // 每次输入改变时
      onChanged: (value) {
        setState(() {
          _hideClear = value.isEmpty;
        });
      },
    );
  }
}

/* --------------------------------验证码输入框------------------------------- */
class VCodeInputGroup extends StatelessWidget {
  static var _defaultPadding = EdgeInsets.only(top: 75.h);

  VCodeInputGroup(
      {Key? key,
      this.label = '验证码:',
      this.padding,
      required this.controller,
      this.onPressed})
      : super(key: key);

  final String label;
  final EdgeInsetsGeometry? padding;
  final TextEditingController controller;
  final Function? onPressed;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: null == this.padding ? _defaultPadding : this.padding!,
      child: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(this.label, style: Styles.formLabelStyle),
          VCodeInput(
            controller: this.controller,
            onPressed: this.onPressed,
          )
        ],
      ),
    );
  }
}

class VCodeInput extends StatefulWidget {
  VCodeInput({Key? key, required this.controller, this.onPressed}) : super(key: key);

  final TextEditingController controller;
  final Function? onPressed;

  @override
  _VCodeInputState createState() => _VCodeInputState();
}

class _VCodeInputState extends State<VCodeInput> {
  var _text = '发送验证码';
  var _seconds = 60;
  var _isDisabled = false;
  var _hideClear = true;

  @override
  Widget build(BuildContext context) {
    return TextFormField(
      controller: widget.controller,
      decoration: InputDecoration(
        hintText: '4位验证码',
        suffixIcon: SizedBox(
          width: Styles.buttonFontSize! * 5 + Styles.iconSize! * 3,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: <Widget>[
              Expanded(
                child: Offstage(
                  offstage: _hideClear,
                  child: IButton(
                      iconSize: Styles.iconSize!,
                      icon: Icon(Icons.cancel, color: Styles.primaryColor),
                      onPressed: () {
                        widget.controller.clear();
                        setState(() {
                          _hideClear = true;
                        });
                      }),
                ),
              ),
              TButton(
                  child: Text(_text, style: Styles.btnFontStyle),
                  onPressed: _onPressed()),
            ],
          ),
        ),
      ),
      maxLength: 4,
      validator: (value) {
        return value!.isEmpty ? '请输入验证码' : null;
      },
      keyboardType: TextInputType.number,
      inputFormatters: [FilteringTextInputFormatter.allow(Utils.numberPattern)],
      onChanged: (value) {
        setState(() {
          _hideClear = value.isEmpty;
        });
      },
    );
  }

  VoidCallback _onPressed() {
    if (_isDisabled) {
      return () {};
    } else {
      return () {
        if (null != widget.onPressed) {
          widget.onPressed!();
        }
        _isDisabled = true;
        _seconds = 60;
        Timer.periodic(Utils.timeout, (timer) {
          setState(() {
            _text = _seconds.toString().padLeft(2, '0') + "秒后重试";
          });
          _seconds--;

          if (_seconds < 0) {
            setState(() {
              _text = '发送验证码';
            });
            timer.cancel(); // 取消定时器
            _isDisabled = false;
          }
        });
      };
    }
  }
}

/* --------------------------------手机号输入框------------------------------- */
class CellInputGroup extends StatelessWidget {
  static var _defaultPadding = EdgeInsets.only(top: 75.h);

  CellInputGroup(
      {Key? key,
      this.label = '手机号:',
      this.padding,
      required this.controller})
      : super(key: key);

  final String label;
  final EdgeInsetsGeometry? padding;
  final TextEditingController controller;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: null == this.padding ? _defaultPadding : this.padding!,
      child: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(this.label, style: Styles.formLabelStyle),
          CellInput(
            controller: this.controller,
          )
        ],
      ),
    );
  }
}

class CellInput extends StatefulWidget {
  CellInput({Key? key, required this.controller}) : super(key: key);

  final TextEditingController controller;

  @override
  _CellInputState createState() => _CellInputState();
}

class _CellInputState extends State<CellInput> {
  var _hideClear = true;

  @override
  Widget build(BuildContext context) {
    return TextFormField(
      controller: widget.controller,
      decoration: InputDecoration(
          hintText: '11位手机号码',
          suffixIcon: Offstage(
            offstage: _hideClear,
            child: IButton(
                iconSize: Styles.iconSize!,
                icon: Icon(Icons.cancel, color: Styles.primaryColor),
                onPressed: () {
                  widget.controller.clear();
                  setState(() {
                    _hideClear = true;
                  });
                }),
          )),
      maxLength: 11,
      validator: (value) {
        return Utils.testCellNo(value!) ? null : '请输入有效的手机号';
      },
      keyboardType: TextInputType.phone,
      inputFormatters: [FilteringTextInputFormatter.allow(Utils.numberPattern)],
      onChanged: (value) {
        setState(() {
          _hideClear = value.isEmpty;
        });
      },
    );
  }
}

/* ---------------------------------文本输入框-------------------------------- */
class StrInputGroup extends StatelessWidget {
  static var _defaultPadding = EdgeInsets.only(top: 75.h);

  StrInputGroup(
      {Key? key,
      this.label = '名称:',
      this.hintText,
      this.maxLength,
      this.padding,
      required this.controller})
      : super(key: key);

  final String label;
  final String? hintText;
  final int? maxLength;
  final EdgeInsetsGeometry? padding;
  final TextEditingController controller;

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: null == this.padding ? _defaultPadding : this.padding!,
      child: Column(
        mainAxisSize: MainAxisSize.min,
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Text(this.label, style: Styles.formLabelStyle),
          StrInput(
            hintText: this.hintText,
            maxLength: this.maxLength,
            controller: this.controller,
          )
        ],
      ),
    );
  }
}

class StrInput extends StatefulWidget {
  StrInput({
    Key? key,
    this.hintText = '最长16个字符',
    this.maxLength = 16,
    this.inputFormatters,
    required this.controller,
  }) : super(key: key);

  final hintText;
  final maxLength;
  final List<TextInputFormatter>? inputFormatters;
  final TextEditingController controller;

  @override
  _StrInputState createState() => _StrInputState();
}

class _StrInputState extends State<StrInput> {
  var _hideClear = true;

  @override
  Widget build(BuildContext context) {
    return TextFormField(
      controller: widget.controller,
      decoration: InputDecoration(
          hintText: widget.hintText,
          suffixIcon: Offstage(
            offstage: _hideClear,
            child: IButton(
                iconSize: Styles.iconSize!,
                icon: Icon(Icons.cancel, color: Styles.primaryColor),
                onPressed: () {
                  widget.controller.clear();
                  setState(() {
                    _hideClear = true;
                  });
                }),
          )),
      maxLength: widget.maxLength,
      validator: (value) {
        return value!.isNotEmpty ? null : '不能为空值';
      },
      inputFormatters: widget.inputFormatters,
      onChanged: (value) {
        setState(() {
          _hideClear = value.isEmpty;
        });
      },
    );
  }
}