import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
import 'package:provider/provider.dart';
import 'package:fcs/model/language_model.dart';
import 'package:fcs/model/product_model.dart';
import 'package:fcs/model/storage_model.dart';
import 'package:fcs/theme/theme.dart';
import 'package:fcs/vo/pd.dart';
import 'package:fcs/vo/product.dart';
import 'package:fcs/vo/storage.dart';
import 'package:fcs/widget/localization/app_translations.dart';
import 'package:fcs/widget/progress.dart';

class PDItem extends StatefulWidget {
  final PDLine pdLine;
  const PDItem({Key key, this.pdLine}) : super(key: key);
  @override
  _PDItemState createState() => _PDItemState();
}

class _PDItemState extends State<PDItem> {
  final _formKey = GlobalKey<FormState>();
  bool _isLoading = false;
  String currentStorageID;
  String currentProductID;
  TextEditingController _quantity = new TextEditingController();
  PDLine pdLine = PDLine();

  @override
  void initState() {
    super.initState();
    if (widget.pdLine != null) {
      this._quantity.text = widget.pdLine.quantity.toString();
      this.currentProductID = widget.pdLine.productID;
      this.currentStorageID = widget.pdLine.storageID;
      this.pdLine = widget.pdLine;
      this.pdLine.action = "update";
    } else {
      this.pdLine.action = "create";
    }
  }

  Widget showInventoryList(BuildContext context, StorageModel storageModel) {
    return Row(
      mainAxisSize: MainAxisSize.max,
      children: <Widget>[
        Image.asset(
          "assets/inventory.png",
          color: primaryColor,
          width: 25,
        ),
        SizedBox(
          width: 20,
        ),
        new Flexible(
          child: Container(
            width: 170.0,
            child: DropdownButton<String>(
              value: currentStorageID,
              isExpanded: true,
              hint: Text(
                'Select Storage',
                style: labelStyle,
              ),
              onChanged: changedDropDownItem,
              items: storageModel.storages
                  .map<DropdownMenuItem<String>>((Storage storage) {
                return new DropdownMenuItem<String>(
                  value: storage.id,
                  child: new Text(storage.name, style: textStyle),
                );
              }).toList(),
            ),
          ),
        ),
      ],
    );
  }

  void changedDropDownItem(selected) {
    setState(() {
      currentStorageID = selected;
    });
  }

  Widget showProducts(BuildContext context, ProductModel productModel) {
    return Row(
      mainAxisSize: MainAxisSize.max,
      children: <Widget>[
        Icon(
          FontAwesomeIcons.tag,
          color: primaryColor,
          size: 20,
        ),
        SizedBox(
          width: 20,
        ),
        new Flexible(
          child: Container(
            width: 170.0,
            child: DropdownButton<String>(
              value: currentProductID,
              isExpanded: true,
              hint: Text(
                'Select Product',
                style: labelStyle,
              ),
              onChanged: changedProduct,
              items: productModel.products
                  .map<DropdownMenuItem<String>>((Product product) {
                return new DropdownMenuItem<String>(
                  value: product.id,
                  child: new Text(product.name, style: textStyle),
                );
              }).toList(),
            ),
          ),
        ),
      ],
    );
  }

  void changedProduct(selected) {
    setState(() {
      currentProductID = selected;
    });
  }

  @override
  Widget build(BuildContext context) {
    var storageModel = Provider.of<StorageModel>(context);
    var productModel = Provider.of<ProductModel>(context);
    var languageModel = Provider.of<LanguageModel>(context);

    final quantityBox = Container(
      padding: EdgeInsets.only(top: 10),
      child: TextFormField(
        controller: _quantity,
        keyboardType: TextInputType.number,
        autofocus: false,
        cursorColor: primaryColor,
        decoration: new InputDecoration(
          labelText: AppTranslations.of(context).text("pd.quantity"),
          labelStyle: languageModel.isEng ? labelStyle : labelStyleMM,
          icon: Icon(
            FontAwesomeIcons.sortNumericUpAlt,
            color: primaryColor,
          ),
          enabledBorder: UnderlineInputBorder(
              borderSide: BorderSide(color: primaryColor, width: 1.0)),
          focusedBorder: UnderlineInputBorder(
              borderSide: BorderSide(color: primaryColor, width: 1.0)),
        ),
        validator: (value) {
          if (value.isEmpty) {
            return AppTranslations.of(context).text("pd.form.quan");
          }
          return null;
        },
      ),
    );

    return LocalProgress(
      inAsyncCall: _isLoading,
      child: Scaffold(
          appBar: AppBar(
            backgroundColor: primaryColor,
            title: Text(
              AppTranslations.of(context).text('pd.product.title'),
              style: languageModel.isEng
                  ? TextStyle()
                  : TextStyle(fontFamily: 'MyanmarUnicode'),
            ),
            actions: <Widget>[
              IconButton(
                icon: Icon(Icons.delete),
                onPressed: () {
                  _delete();
                },
              ),
              IconButton(
                icon: Icon(Icons.save),
                onPressed: () {
                  if (!_formKey.currentState.validate()) return;
                  _save();
                },
              )
            ],
          ),
          body: Form(
            key: _formKey,
            child: ListView(
              shrinkWrap: true,
              padding: EdgeInsets.only(left: 24.0, right: 20.0),
              children: <Widget>[
                quantityBox,
                showInventoryList(context, storageModel),
                showProducts(context, productModel)
              ],
            ),
          )),
    );
  }

  _save() {
    if (currentProductID == null || currentStorageID == null) return;
    this.pdLine.storageID = currentStorageID;
    var storageName =
        Provider.of<StorageModel>(context).getStorageName(currentStorageID);
    this.pdLine.storageName = storageName;
    this.pdLine.productID = currentProductID;
    var productName =
        Provider.of<ProductModel>(context).getProductName(currentProductID);
    this.pdLine.productName = productName;
    this.pdLine.quantity = int.parse(_quantity.text);
    Navigator.pop<PDLine>(context, this.pdLine);
  }

  _delete() {
    this.pdLine.action = "delete";
    Navigator.pop<PDLine>(context, this.pdLine);
  }
}