import 'package:eva_icons_flutter/eva_icons_flutter.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';



class TextFields extends StatefulWidget {

  TextFields({Key key, this.type, this.hintText, this.suffixIcon, this.autoFocus, this.onChanged, this.initialValue, this.minLines, this.maxLines, this.inputFormatters, this.padding, this.focus=false, this.maxLengthEnforced=true,
  this.suffixIconColor, this.inputAction, this.onSubmit, this.keepPadding=true, this.textCapitalization = TextCapitalization.none, this.onTap, this.controller, this.keyboardType, this.validator, this.borderOnlyError=false,
  this.onSaved, this.onSuffixTap, this.readOnly: false, this.maxLength, this.prefixIcon, this.bare=false, this.fontSize=16.0, this.fontWeight=FontWeight.w700, this.autoValidate=false}) : super(key: key);

  final String hintText;
  final String initialValue;
  final String type;
  final bool autoFocus;
  final IconData suffixIcon;
  final Color suffixIconColor;
  final IconData prefixIcon;
  final VoidCallback onTap;
  final TextEditingController controller;
  final TextInputType keyboardType;
  final FormFieldValidator validator;
  final Function onSaved;
  final Function onSuffixTap;
  final Function onChanged;
  final Function onSubmit;
  final bool readOnly;
  final int maxLength;
  final int minLines;
  final int maxLines;
  final bool maxLengthEnforced;
  final bool bare;
  final TextInputAction inputAction;
  final double fontSize;
  final FontWeight fontWeight;
  final bool keepPadding;
  final TextCapitalization textCapitalization;
  final List<TextInputFormatter> inputFormatters;
  final bool autoValidate;
  final EdgeInsets padding;
  final bool focus;
  final bool borderOnlyError;

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

class _TextFieldsState extends State<TextFields> {
  final FocusNode _focusNode = FocusNode();
  bool focus = false;
  bool view = false;

  @override
  void initState() {
    super.initState();
    _focusNode.addListener(() {
      setState(() {
        focus = _focusNode.hasFocus;
      });
    });
  }

  @override
  void didUpdateWidget(TextFields oldWidget) {
    if (widget.focus)
      _focusNode.requestFocus();
    super.didUpdateWidget(oldWidget);
  }

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

  Widget _buildSuffixIcon() {
    switch (widget.type) {
      case "password":
      {  return Padding(
          padding: const EdgeInsets.only(right: 8.0),
          child: view ?
            InkWell(onTap: () {this.setState(() { view= false; });}, child: Icon(EvaIcons.eye, size: 24.0, color: Color.fromRGBO(78, 62, 253, 1.0)))
            :
            InkWell(onTap: () {this.setState(() { view= true; });}, child: Icon(EvaIcons.eyeOff, size: 24.0, color: Colors.grey[500]))
        );}

      break;
      default:
        if (widget.suffixIcon!=null)
          return InkWell(onTap: widget.onSuffixTap, child: Icon(widget.suffixIcon, size: 22.0, color: widget.suffixIconColor!=null ? widget.suffixIconColor : Colors.grey[500]));
        else
          return null;
    }
  }

  bool _determineReadOnly() {
    if (widget.readOnly!=null && widget.readOnly) {
      _focusNode.unfocus();
      return true;
    } else {
      return false;
    }
  }

  @override
  Widget build(BuildContext context) {
    return (
      AnimatedContainer(
        duration: Duration(milliseconds: 300),
        decoration: widget.bare ? null :BoxDecoration(
          boxShadow: [BoxShadow(color: Color.fromRGBO(70, 68, 167, focus ? 0.20 : 0), offset: Offset(0.0, 13.0), blurRadius: focus ? 34.0 : 12.0)]
        ),
        child: TextFormField(
          keyboardAppearance: Theme.of(context).brightness,
          scrollPhysics: BouncingScrollPhysics(),
          autovalidate: widget.autoValidate,
          textCapitalization: widget.textCapitalization,
          onFieldSubmitted: widget.inputAction==TextInputAction.next ? (widget.onSubmit!=null ? widget.onSubmit : (val) { _focusNode.nextFocus(); }) : widget.onSubmit,
          textInputAction: widget.inputAction,
          minLines: widget.minLines ?? 1,
          maxLines: widget.maxLines ?? 1,
          maxLengthEnforced: widget.maxLengthEnforced,
          initialValue: widget.initialValue,
          onChanged: widget.onChanged,
          focusNode: _focusNode,
          maxLength: widget.maxLength ?? null,
          controller: widget.controller,
          keyboardType: widget.keyboardType,
          readOnly: _determineReadOnly(),
          obscureText: widget.type=="password" && !view ? true : false,
          autofocus: widget.autoFocus ?? false,
          validator: widget.validator,
          onSaved: widget.onSaved,
          style: Theme.of(context).textTheme.body2.copyWith( fontSize: widget.fontSize, fontWeight: widget.fontWeight ),
          inputFormatters: widget.inputFormatters,
          decoration: InputDecoration(
            counterText: "",
            hintText: widget.hintText,
            hintStyle:  TextStyle(fontSize: widget.fontSize, fontWeight: widget.fontWeight, color: Theme.of(context).hintColor),

            contentPadding: widget.padding!=null ? widget.padding : EdgeInsets.symmetric(vertical: (widget.bare && !widget.keepPadding) ? 0.0 : 10.0, horizontal: 16.0),
            filled: true,
            fillColor: widget.bare ? Colors.transparent : Theme.of(context).backgroundColor,

            suffixIcon: _buildSuffixIcon(),
            prefixIcon: widget.type!="search" ?
            widget.prefixIcon!=null ?
              Padding(
                padding: EdgeInsets.only(left: 28.0, top: 14.0, bottom: 14.0, right: 0),
                child: Text("\$", style: TextStyle( fontSize: 14, fontWeight: FontWeight.w800),),
              )
                :
              null
              :
            Icon(EvaIcons.search, size: 20.0, color: Colors.grey[500]),

            errorStyle: TextStyle(fontSize: 14.0, fontWeight: widget.fontWeight, height: widget.borderOnlyError ? 0.0 : null),
            errorBorder: OutlineInputBorder(
              borderSide: BorderSide(color: Theme.of(context).errorColor.withOpacity(widget.bare ? 0.0 : 0.5 ), width: 2.0),
              borderRadius: BorderRadius.circular(widget.bare ? 0.0 : 8.0)
            ),
            focusedErrorBorder:  OutlineInputBorder(
              borderSide: BorderSide(color: Theme.of(context).errorColor.withOpacity(widget.bare ? 0.0 : 0.5 ), width: 2.0),
              borderRadius: BorderRadius.circular(widget.bare ? 0.0 : 8.0)
            ),
            focusedBorder:  OutlineInputBorder(
              borderSide: BorderSide(color: Theme.of(context).dividerColor.withOpacity(widget.bare ? 0.0 : 1.0 ), width: 2.0),
              borderRadius: BorderRadius.circular(widget.bare ? 0.0 : 8.0)
            ),
            disabledBorder: OutlineInputBorder(
              borderSide: BorderSide(color: Theme.of(context).dividerColor.withOpacity(widget.bare ? 0.0 : 1.0 ), width: 2.0),
              borderRadius: BorderRadius.circular(widget.bare ? 0.0 : 8.0)
            ),
            enabledBorder: OutlineInputBorder(
              borderSide: BorderSide(color: Theme.of(context).dividerColor.withOpacity(widget.bare ? 0.0 : 1.0 ), width: 2.0),
              borderRadius: BorderRadius.circular(widget.bare ? 0.0 : 8.0)
            )

          ),
        ),
      )
    );
  }
}