// ignore_for_file: unused_local_variable

import 'package:fcs/helpers/theme.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_icons_null_safety/flutter_icons_null_safety.dart';

import '../../domain/entities/cargo_type.dart';
import '../../domain/entities/user.dart';
import '../main/util.dart';
import '../widgets/continue_button.dart';
import '../widgets/local_title.dart';
import '../widgets/previous_button.dart';
import 'cargo_type_addition.dart';
import 'cargo_type_addition_dialog.dart';
import 'mix_cargo_type_addition_dialog.dart';
import 'surcharge_item_addition.dart';

typedef OnPrevious = Function(
    List<CargoType> cargoTypes, List<CargoType> customDuties);
typedef OnContinue = Function(
    List<CargoType> cargoTypes, List<CargoType> customDuties);

class CargoWidget extends StatefulWidget {
  final User sender;
  final User consignee;
  final List<CargoType> cargoTypes;
  final List<CargoType> surchargeItems;
  final OnPrevious? onPrevious;
  final OnContinue? onContinue;

  const CargoWidget({
    super.key,
    required this.cargoTypes,
    required this.surchargeItems,
    this.onPrevious,
    this.onContinue,
    required this.sender,
    required this.consignee,
  });

  @override
  State<CargoWidget> createState() => _CargoWidgetState();
}

class _CargoWidgetState extends State<CargoWidget> {
  List<CargoType> _cargoTypes = [];
  List<CargoType> _surchareItems = [];
  TextEditingController totalCtl = TextEditingController();

  List<TextEditingController> cargoTypeControllers = [];
  List<TextEditingController> surchargeControllers = [];

  bool get hasValueTotalWeight =>
      totalCtl.text.isNotEmpty && totalCtl.text != '0';
  bool get hasValueCargoes =>
      _cargoTypes.isNotEmpty && _cargoTypes.every((e) => e.weight != 0);

  double get actualTotalWeight =>
      _cargoTypes.fold(0, (sum, value) => sum + value.weight);
  String? error;

  @override
  void initState() {
    _init();
    super.initState();
  }

  _init() {
    // for cargo types
    if (widget.cargoTypes.isNotEmpty) {
      _cargoTypes = List.from(widget.cargoTypes);
      for (var e in _cargoTypes) {
        var editor = TextEditingController();
        editor.text = removeTrailingZeros(e.weight);
        editor.addListener(inputChangeListener);
        cargoTypeControllers.add(editor);
      }
      onUpdated();
    } else {
      WidgetsBinding.instance.addPostFrameCallback((_) {
        _openCargoTypeSelection();
      });
    }

    //for surcharge items
    if (widget.surchargeItems.isNotEmpty) {
      _surchareItems = List.from(widget.surchargeItems);
      for (var e in _surchareItems) {
        var editor = TextEditingController();
        editor.text = e.qty.toString();
        editor.addListener(inputChangeListener);
        surchargeControllers.add(editor);
      }
    }

    if (mounted) {
      setState(() {});
    }
  }

  _openCargoTypeSelection() async {
    List<CargoType>? cargoes = await showDialog(
        context: context, builder: (_) => const CargoTypeAdditionDialog());
    if (cargoes == null) return;
    _cargoTypes = cargoes;
    _cargoTypes.sort((a, b) => (a == b ? 0 : (a.isMixCargo ? 1 : -1)));

    for (var e in _cargoTypes) {
      var editor = TextEditingController();
      editor.text = '0';
      editor.addListener(inputChangeListener);
      cargoTypeControllers.add(editor);
    }

    if (mounted) {
      setState(() {});
    }
  }

  inputChangeListener() {
    setState(() {});
  }

  List<int> getEmptyFields() {
    List<int> emptyFields = [];
    for (int i = 0; i < cargoTypeControllers.length; i++) {
      if (cargoTypeControllers[i].text.trim().isEmpty ||
          cargoTypeControllers[i].text.trim() == "0") {
        emptyFields.add(i);
      }
    }
    return emptyFields;
  }

  void onUpdated() {
    if (!hasValueTotalWeight && hasValueCargoes) {
      totalCtl.text = removeTrailingZeros(actualTotalWeight);
      error = null;
    } else {
      // auto populate remaining value
      double totalWeight = (double.tryParse(totalCtl.text) ?? 0);

      if (actualTotalWeight > totalWeight) {
        error = "Exceed total weight";
      } else {
        error = null;
        double remainingWeight =
            (totalWeight - actualTotalWeight).clamp(0, totalWeight);

        List<int> emptyFieldIndexes = getEmptyFields();

        if (emptyFieldIndexes.isNotEmpty) {
          if (emptyFieldIndexes.length == 1) {
            _cargoTypes.asMap().entries.forEach((e) {
              if (e.value.weight == 0) {
                e.value.weight = remainingWeight;
                cargoTypeControllers[e.key].text =
                    removeTrailingZeros(e.value.weight);
              }
            });
          }
        }
      }
    }
    if (mounted) {
      setState(() {});
    }
  }

  @override
  Widget build(BuildContext context) {
    final senderBox = userDisplayBox(context,
        lableKey: "box.sender.title",
        icon: MaterialCommunityIcons.account_arrow_right,
        showLink: false,
        name: widget.sender.name ?? "",
        fcsID: widget.sender.fcsID ?? "");

    final consigneeBox = userDisplayBox(context,
        showLink: false,
        lableKey: "box.consignee.title",
        icon: MaterialCommunityIcons.account_arrow_left,
        name: widget.consignee.name,
        fcsID: widget.consignee.fcsID);

    final userRow = Row(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        Expanded(flex: 2, child: consigneeBox),
        Flexible(child: senderBox)
      ],
    );

    final cargoTitle = LocalTitle(
      textKey: "box.input_cargo_weight",
      topPadding: 0,
      trailing: IconButton(
          icon: Icon(
            Icons.add_circle,
            color: primaryColor,
          ),
          onPressed: () async {
            CargoType? cargoType = await Navigator.push(
                context,
                CupertinoPageRoute(
                    builder: (context) =>
                        CargoTypeAddition(cargoTypes: _cargoTypes)));
            if (cargoType == null) return;

            if (!cargoType.isMixCargo) {
              _cargoTypes.add(cargoType);
            }
            _cargoTypes.sort((a, b) => (a == b ? 0 : (a.isMixCargo ? 1 : -1)));

            if (cargoType.isMixCargo) {
              _cargoTypes.add(cargoType);
            }

            cargoTypeControllers.clear();
            for (var e in _cargoTypes) {
              var editor = TextEditingController();
              editor.text = removeTrailingZeros(e.weight);
              editor.addListener(inputChangeListener);
              cargoTypeControllers.add(editor);
            }
            if (mounted) {
              setState(() {});
            }
          }),
    );

    final cargosBox = Padding(
      padding: const EdgeInsets.only(top: 5),
      child: Wrap(
          alignment: WrapAlignment.spaceBetween,
          runSpacing: 25,
          children: _cargoTypes.asMap().entries.map((e) {
            var key = e.key;
            var c = e.value;
            return SizedBox(
              width: MediaQuery.of(context).size.width / 2.3,
              child: Column(
                children: [
                  Row(
                    children: [
                      InkResponse(
                          radius: 25,
                          onTap: () {
                            double totalWeight =
                                double.tryParse(totalCtl.text) ?? 0;

                            if (actualTotalWeight > totalWeight) {
                              error = "Exceed total weight";
                            } else {
                              double result = totalWeight - c.weight;
                              totalCtl.text = removeTrailingZeros(result);
                            }

                            _cargoTypes.removeAt(key);
                            cargoTypeControllers.removeAt(key);

                            if (mounted) {
                              setState(() {});
                            }
                          },
                          child: Icon(Feather.minus_circle, color: labelColor)),
                      const SizedBox(width: 10),
                      Flexible(
                        child: inputTextFieldWidget(context,
                            lableText: c.name ?? "",
                            controller: cargoTypeControllers[key],
                            onFieldSubmitted: (value) {
                          _cargoTypes[e.key].weight =
                              double.tryParse(value) ?? 0;
                          onUpdated();
                        },
                            suffixIcon: InkResponse(
                                radius: 23,
                                onTap: () {
                                  double totalWeight =
                                      (double.tryParse(totalCtl.text) ?? 0);

                                  var list = _cargoTypes
                                      .where((e) => e.id != c.id)
                                      .toList();
                                  double resetValue = totalWeight -
                                      (list.fold(0,
                                          (sum, value) => sum + value.weight));
                                  setState(() {
                                    e.value.weight = resetValue;
                                    cargoTypeControllers[e.key].text =
                                        removeTrailingZeros(resetValue);
                                  });

                                  onUpdated();
                                },
                                child: Icon(Ionicons.md_refresh_circle,
                                    color: labelColor, size: 22))),
                      ),
                      c.isMixCargo
                          ? InkResponse(
                              radius: 23,
                              onTap: () async {
                                List<CargoType>? cargoes = await showDialog(
                                    context: context,
                                    builder: (_) => MixCargoTypeAdditionDialog(
                                        cargoTypes: c.mixCargoes));
                                if (cargoes == null) return;
                                setState(() {
                                  c.mixCargoes = List.from(cargoes);
                                });
                              },
                              child: Icon(Icons.add_circle,
                                  color: labelColor, size: 22))
                          : const SizedBox()
                    ],
                  ),
                  c.mixCargoes.isEmpty
                      ? const SizedBox()
                      : Padding(
                          padding: const EdgeInsets.only(top: 5),
                          child: Column(
                              children: c.mixCargoes.map((e) {
                            return Padding(
                              padding: const EdgeInsets.only(top: 12),
                              child: Row(
                                children: [
                                  const SizedBox(width: 25),
                                  InkResponse(
                                      radius: 23,
                                      onTap: () {
                                        setState(() {
                                          c.mixCargoes.remove(e);
                                        });
                                      },
                                      child: Icon(Feather.minus_circle,
                                          color: labelColor, size: 20)),
                                  Padding(
                                    padding: const EdgeInsets.only(left: 10),
                                    child: Text(e.name ?? ""),
                                  ),
                                ],
                              ),
                            );
                          }).toList()),
                        )
                ],
              ),
            );
          }).toList()),
    );

    final totalWeightBox = Row(
      mainAxisAlignment: MainAxisAlignment.end,
      children: [
        SizedBox(
            width: MediaQuery.of(context).size.width / 2.3,
            child: Row(
              children: [
                InkResponse(
                    radius: 25,
                    onTap: () {
                      setState(() {
                        totalCtl.clear();
                      });
                    },
                    child: Icon(MaterialIcons.clear, color: labelColor)),
                const SizedBox(width: 10),
                Flexible(
                  child: inputTextFieldWidget(context,
                      lableText: "Total",
                      controller: totalCtl, onFieldSubmitted: (neValue) {
                    if (hasValueCargoes) {
                      double totalWeight = double.tryParse(neValue) ?? 0;
                      if (totalWeight < actualTotalWeight) {
                        setState(() {
                          error = "Invalid total weight";
                        });
                      } else {
                        setState(() {
                          error = null;
                        });
                      }
                    } else {
                      onUpdated();
                    }
                  },
                      suffixIcon: InkResponse(
                          radius: 23,
                          onTap: () {
                            setState(() {
                              totalCtl.text =
                                  removeTrailingZeros(actualTotalWeight);
                              error = null;
                            });
                          },
                          child: Icon(Ionicons.md_refresh_circle,
                              color: labelColor, size: 22))),
                ),
              ],
            )),
      ],
    );

    final subchargeItemTitleBox = LocalTitle(
      textKey: "box.input_surcharge_item",
      trailing: IconButton(
          icon: Icon(
            Icons.add_circle,
            color: primaryColor,
          ),
          onPressed: () async {
            CargoType? surchargeItem = await Navigator.push(
                context,
                CupertinoPageRoute(
                    builder: (context) =>
                        SurchargeItemAddition(items: _surchareItems)));
            if (surchargeItem == null) return;

            _surchareItems.add(surchargeItem);

            surchargeControllers.clear();
            _surchareItems.asMap().entries.forEach((e) {
              var editor = TextEditingController();
              editor.text = e.value.qty.toString();
              surchargeControllers.add(editor);
            });

            if (mounted) {
              setState(() {});
            }
          }),
    );

    final subChargeItemsBox = Padding(
      padding: const EdgeInsets.only(top: 5),
      child: Wrap(
          alignment: WrapAlignment.spaceBetween,
          runSpacing: 25,
          children: _surchareItems.asMap().entries.map((e) {
            var key = e.key;
            var c = e.value;
            return SizedBox(
              width: MediaQuery.of(context).size.width / 2.3,
              child: Row(
                children: [
                  InkResponse(
                      radius: 25,
                      onTap: () {
                        setState(() {
                          _surchareItems.removeAt(key);
                        });
                      },
                      child: Icon(Feather.minus_circle, color: labelColor)),
                  const SizedBox(width: 10),
                  Flexible(
                    child: inputTextFieldWidget(
                      context,
                      lableText: c.name ?? "",
                      controller: surchargeControllers[key],
                      onChanged: (newValue) {
                        setState(() {
                          _surchareItems[key].qty = int.tryParse(newValue) ?? 0;
                        });
                      },
                    ),
                  ),
                ],
              ),
            );
          }).toList()),
    );

    final continueBtn = ContinueButton(
      onTap: () {
        if (widget.onContinue != null) {
          if (_surchareItems.isNotEmpty &&
              _surchareItems.any((item) => item.qty == 0)) {
            showMsgDialog(
                context, "Error", "Please insert surcharge item quantity");
            return;
          }
          widget.onContinue!(_cargoTypes, _surchareItems);
        }
      },
    );

    final previousBtn = PreviousButton(onTap: () {
      if (widget.onPrevious != null) {
        widget.onPrevious!(_cargoTypes, _surchareItems);
      }
    });

    return Column(
      children: [
        Expanded(
          child: Padding(
            padding: EdgeInsets.only(left: 10, right: 10),
            child: ListView(
              children: [
                const SizedBox(height: 8),
                userRow,
                cargoTitle,
                cargosBox,
                const SizedBox(height: 15),
                Divider(),
                const SizedBox(height: 5),
                error != null
                    ? Text(
                        error!,
                        style: TextStyle(color: dangerColor),
                      )
                    : const SizedBox(),
                totalWeightBox,
                subchargeItemTitleBox,
                subChargeItemsBox,
                const SizedBox(height: 30),
              ],
            ),
          ),
        ),
        widget.onContinue != null
            ? Padding(
                padding: const EdgeInsets.only(left: 15, right: 15, top: 10),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    previousBtn,
                    continueBtn,
                  ],
                ),
              )
            : const SizedBox(),
        const SizedBox(height: 20)
      ],
    );
  }

  Widget inputTextFieldWidget(BuildContext context,
      {required String lableText,
      TextEditingController? controller,
      Function(String)? onChanged,
      Function(String)? onFieldSubmitted,
      bool readOnly = false,
      Widget? suffixIcon}) {
    return TextFormField(
      controller: controller,
      style: textStyle,
      cursorColor: primaryColor,
      keyboardType: TextInputType.number,
      onChanged: onChanged,
      onFieldSubmitted: onFieldSubmitted,
      readOnly: readOnly,
      decoration: InputDecoration(
        suffixIcon: suffixIcon,
        contentPadding: EdgeInsets.all(0),
        labelText: lableText,
        labelStyle: newLabelStyle(color: Colors.black54, fontSize: 17),
        enabledBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: primaryColor, width: 1.0)),
        focusedBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: primaryColor, width: 1.0)),
        disabledBorder: UnderlineInputBorder(
            borderSide: BorderSide(color: primaryColor, width: 1.0)),
      ),
    );
  }
}