package ch.zhaw.gartenverwaltung;

import ch.zhaw.gartenverwaltung.io.HardinessZoneNotSetException;
import ch.zhaw.gartenverwaltung.plantList.PlantListModel;
import ch.zhaw.gartenverwaltung.types.HardinessZone;
import ch.zhaw.gartenverwaltung.types.Plant;
import javafx.application.Platform;
import javafx.beans.property.ListProperty;
import javafx.beans.property.SimpleListProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.geometry.Bounds;
import javafx.scene.control.*;
import javafx.scene.image.ImageView;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.VBox;

import java.io.IOException;
import java.net.URL;
import java.util.List;
import java.util.ResourceBundle;

public class PlantsController implements Initializable {
    private final PlantListModel plantListModel = new PlantListModel();
    private Plant selectedPlant = null;
    private final HardinessZone DEFAULT_HARDINESS_ZONE = HardinessZone.ZONE_8A;

    // TODO: move to model
    private final ListProperty<Plant> plantListProperty = new SimpleListProperty<>(FXCollections.observableArrayList());

    @FXML
    private CheckBox autum_filter;

    @FXML
    private VBox climate_zones;

    @FXML
    private Label description_plant;

    @FXML
    private ImageView img_plant;

    @FXML
    private ListView<Plant> list_plants;

    @FXML
    private Button saveToMyPlant_button;

    @FXML
    private TextField search_plants;

    @FXML
    private CheckBox sommer_filter;

    @FXML
    private CheckBox spring_filter;

    @FXML
    private CheckBox winter_filter;

    @FXML
    void filterAutum(ActionEvent event) {
        //ToDo

    }

    @FXML
    void filterSommer(ActionEvent event) {
        //ToDo

    }

    @FXML
    void filterSpring(ActionEvent event) {
        //ToDo

    }

    @FXML
    void filterWinter(ActionEvent event) {
        //ToDo

    }

    @FXML
    void saveToMyPlant(ActionEvent event) {
        //ToDo model save selectedPlant to mySelectedPlant(IO)
    }

    @FXML
    void searchForPlant(KeyEvent event) {
        viewFilteredListBySearch(search_plants.getText());
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void initialize(URL url, ResourceBundle resourceBundle) {
        setListCellFactory();
        try {
            plantListProperty.addAll(plantListModel.getPlantList(DEFAULT_HARDINESS_ZONE));
        } catch (HardinessZoneNotSetException | IOException e) {
            e.printStackTrace();
        }

        list_plants.itemsProperty().bind(plantListProperty);
        list_plants.getSelectionModel().selectedItemProperty()
                .addListener((observable, oldPlant, newPlant) -> {
                    if (newPlant != null) {
                        img_plant.setImage(newPlant.image());
                    }
                });

        description_plant.setText("");
        saveToMyPlant_button.setDisable(true);

        createFilterHardinessZone();
        lookForSelectedListEntry();
    }

    private void centerImage() {

        //img_plant.setX(0.3);
        //img_plant.setX(-100);
    }
    private void setListCellFactory() {
        list_plants.setCellFactory(param -> new ListCell<Plant>() {
            @Override
            protected void updateItem(Plant plant, boolean empty) {
                super.updateItem(plant, empty);

                if (empty || plant == null || plant.name() == null) {
                    setText(null);
                } else {
                    setText(plant.name());
                }
            }
        });
    }

    /**
     * update the ListView according to the plant list provided
     * Entry in ListView is plant name
     * @param list plantList which fill the ListView
     */
    private void fillListViewWithData(List<Plant> list) {
        clearListView();
        for (Plant plant : list) {
            list_plants.getItems().add(plant);
        }

    }

    private void viewFilteredListByFilters() {
        boolean springValue = spring_filter.isSelected();
        boolean sommerValue = sommer_filter.isSelected();
        boolean autumValue = autum_filter.isSelected();
        boolean winterValue = winter_filter.isSelected();
        //ToDo getFilteredPlantList with (plantListModel.getFilteredPlantList(DEFAULT_HARDINESS_ZONE, <predicate>))
        //List<Plant> plantList = new LinkedList<>();
        //fillListViewWithData(plantList);
    }

    private void viewFilteredListBySearch(String query) {
        //ToDo getFilteredPlantList with (plantListModel.getFilteredPlantList(DEFAULT_HARDINESS_ZONE, <predicate>))
        try {
            List<Plant> filteredPlants = plantListModel.getFilteredPlantListByString(DEFAULT_HARDINESS_ZONE, query);
            clearListView();
            plantListProperty.addAll(filteredPlants);

        } catch (HardinessZoneNotSetException | IOException e) {
            e.printStackTrace();
        }
    }

    private void createFilterHardinessZone() {
        //ToDo create radioList of hardinessZone in VBox climate_zones
    }

    /**
     * observes changes in the selectedProperty of ListView and updates the description label
     */
    private void lookForSelectedListEntry() {
        list_plants.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Plant>() {
            @Override
            public void changed(ObservableValue<? extends Plant> observable, Plant oldValue, Plant newValue) {
                //ToDo
                if(newValue != null) {
                    selectedPlant = newValue;
                    description_plant.setText(selectedPlant.description());
                    saveToMyPlant_button.setDisable(false);
                    //update img plant
                } else {
                    selectedPlant = null;
                    description_plant.setText("");
                    saveToMyPlant_button.setDisable(true);
                    //update img when null placeholder PNG
                }
            }
        });
    }


    /**
     * clears the ListView of entries
     */
    private void clearListView() {
        plantListProperty.clear();
    }
}