package de.uniluebeck.mi.projmi6.controller;

/**
 * Created by 631806 on 12.11.15.
 */

import ca.uhn.hl7v2.HL7Exception;
import de.uniluebeck.mi.projmi6.db.DBHandler;
import de.uniluebeck.mi.projmi6.hapi.HL7Sender;
import de.uniluebeck.mi.projmi6.model.*;
import de.uniluebeck.mi.projmi6.view.DateTimePicker;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ReadOnlyObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;

import java.io.IOException;
import java.sql.SQLException;

public class FallController {

    /**
     * A property to the case which data this controller manages.
     */
    private final SimpleObjectProperty<Fall> fallProperty = new SimpleObjectProperty<>();
    /**
     * Controllers current state.
     */
    private final SimpleObjectProperty<State> state = new SimpleObjectProperty<>(State.VIEW);
    private MainController mainController;
    @FXML
    private DateTimePicker dtTmAufnahme, dtTmEntlassung;
    @FXML
    private Label fallId;
    @FXML
    private ComboBox<FallArt> fallFallart;
    @FXML
    private ComboBox<Kasse> fallKasse;
    @FXML
    private TextField fallVersichertennummer, fallEinweisenderArzt;
    @FXML
    private CheckBox fallSelbsteinweisung;
    @FXML
    private ComboBox<Diagnose> fallHauptdiagnose;
    @FXML
    private Label fallCreator, fallEditor, fallCreateTime, fallEditTime;
    @FXML
    private Button btnFallSave, btnFallAbort, btnFallCancel, btnFallEnableEdit, btnFallSendHl7;
    @FXML
    private GridPane fallFields;


    /**
     * Contstructor.
     * @param mainController The main controller that creats this instance
     */
    public FallController(MainController mainController) {
        this.mainController = mainController;
    }


    /**
     * Getter for the {@link #fallProperty()}
     */
    public Fall getFall() {
        return fallProperty.get();
    }

    /**
     * Setter for the {@link #fallProperty()}
     * @param fall
     */
    public void setFall(Fall fall) {
        this.fallProperty.set(fall);
    }

    /**
     * The case that is shown in this controller.
     */
    public SimpleObjectProperty<Fall> fallProperty() {
        return fallProperty;
    }

    /**
     * Getter for the {@link #stateProperty()}.
     */
    public State getState() {
        return state.get();
    }

    /**
     * The controllers current state.
     */
    public ReadOnlyObjectProperty<State> stateProperty() {
        return state;
    }

    /**
     * For showing the main diagnosis, the Controller also needs a pointer to the list of case diagnosis.
     * @return
     */
    public ObjectProperty<ObservableList<Diagnose>> diagnosenProperty() {
        return fallHauptdiagnose.itemsProperty();
    }

    /**
     * Getter for the {@link #diagnosenProperty()}
     */
    public ObservableList<Diagnose> getDiagnosen() {
        return fallHauptdiagnose.getItems();
    }

    /**
     * Setter for the diagnosis in the main diagnosis combo box.
     * @see #diagnosenProperty()
     */
    public void setDiagnosen(ObservableList<Diagnose> list) {
        fallHauptdiagnose.setItems(list);
    }

    /**
     * FXMLLoaders initialize()-method.
     */
    @FXML
    private void initialize() {
        fallEinweisenderArzt.disableProperty().bind(fallSelbsteinweisung.selectedProperty());
        fallFallart.setItems(FXCollections.observableArrayList(FallArt.values()));
        fallKasse.setItems(mainController.getStammdaten().getKassen());


        initButtons();

        fallFields.disableProperty().bind(state.isEqualTo(State.VIEW));
        fallProperty.addListener(((observable, oldValue, newValue) -> {
            if (state.get() == State.VIEW) {
                copyFallDataIntoField(fallProperty.get());
            }
        }));


        fallHauptdiagnose.itemsProperty().addListener((observable1, oldValue1, newValue1) -> {
            copyHauptdiagnoseToComboBox(fallProperty.get());
        });


        state.addListener((observable, oldValue, newValue) -> {
            if (newValue == State.EDIT || newValue == State.CREATE) {
                mainController.lockForEdit(MainController.TabName.OVERVIEW);
            } else {
                mainController.unlockFromEdit();
            }
        });
    }

    /**
     * Hide the buttons depending on controller state.
     */
    private void initButtons() {
        btnFallEnableEdit.managedProperty().bind(
                state.isEqualTo(State.VIEW).and(fallProperty.isNotNull())
        );
        btnFallEnableEdit.visibleProperty().bind(btnFallEnableEdit.managedProperty());
        btnFallAbort.managedProperty().bind(
                state.isNotEqualTo(State.VIEW)
        );
        btnFallAbort.visibleProperty().bind(btnFallAbort.managedProperty());

        btnFallSave.managedProperty().bind(
                state.isNotEqualTo(State.VIEW)
        );
        btnFallSave.visibleProperty().bind(btnFallSave.managedProperty());

        btnFallCancel.managedProperty().bind(
                state.isEqualTo(State.VIEW).and(fallProperty.isNotNull())
        );
        btnFallCancel.visibleProperty().bind(btnFallCancel.managedProperty());

        btnFallSendHl7.managedProperty().bind(
                state.isEqualTo(State.VIEW).and(fallProperty.isNotNull())
        );
        btnFallSendHl7.visibleProperty().bind(btnFallSendHl7.managedProperty());
    }

    /**
     * EventHandler for the {@link #btnFallSendHl7} button.
     */
    @FXML
    private void clickedSendHl7() {
        /* Natascha */
        //TODO send funny message
        Patient patient = mainController.getPatientTablesController().getSelectedPatient();
        Fall fall = fallProperty.get();
        fall.setPatient(patient);

        try {
            HL7Sender.createMessageADT_A01(fall);
        } catch (HL7Exception | IOException | SQLException e) {
            e.printStackTrace();
        }
    }

    /**
     * Toggle controller state to edit
     */
    public void editFall() {
        this.state.set(State.EDIT);
    }

    /**
     * EventHandler for {@link #btnFallEnableEdit}
     */
    @FXML
    private void clickedFallEnableEdit() {
        editFall();
    }

    /**
     * EventHandler for the {@link #btnFallCancel}.
     */
    @FXML
    private void clickedFallCancel() {
        if (fallProperty.get() != null) {
            fallProperty.get().setStorniert(true);
            try {
                DBHandler.setFall(fallProperty.get(), mainController.getCurrentMitarbeiter().getMitarbID(), true);
            } catch (Exception e) {
                e.printStackTrace();
            }
            mainController.refreshCasesFromDb(mainController.getPatientTablesController().getSelectedPatient());
        }
    }

    /**
     * EventHandler for the {@link #btnFallAbort}
     */
    @FXML
    private void clickedFallAbort() {
        this.state.set(State.VIEW);
        copyFallDataIntoField(fallProperty.get());
    }

    /**
     * EventHandler for the {@link #btnFallSave} button.
     */
    @FXML
    private void clickedFallSave() {
        if (this.state.get() == State.CREATE) {
            Fall fall = new Fall();
            copyFieldDataIntoFall(fall);
            try {
                int newfallid = DBHandler.setFall(fall, mainController.getCurrentMitarbeiter().getMitarbID());
                fall.setFallID(newfallid);

            } catch (SQLException e) {
                e.printStackTrace();
            }
            try {
                HL7Sender.createMessageADT_A01(fall);
            } catch (IOException | HL7Exception | SQLException e) {
                e.printStackTrace();
            }
        } else {
            copyFieldDataIntoFall(fallProperty.get());
            try {
                DBHandler.setFall(fallProperty.get(), mainController.getCurrentMitarbeiter().getMitarbID(), true);

            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        this.state.set(State.VIEW);
        mainController.refreshCasesFromDb(mainController.getPatientTablesController().getSelectedPatient());
    }

    /**
     * Change the controllers state, init the fields for assistance.
     */
    public void createNewFall() {
        clearFields();
        this.state.set(State.CREATE);

        Patient patient = mainController.getPatientTablesController().getSelectedPatient();

        // Kasse by Default auf die im Patienten hinterlegten Kasse setzen.
        for (Kasse kasse : fallKasse.getItems()) {
            if (kasse.getKassenID() == patient.getKassenID()) {
                fallKasse.getSelectionModel().select(kasse);
                break;
            }
        }
        fallVersichertennummer.setText(patient.getVersichertennummer());
    }

    /**
     * Clears the TextFields.
     */
    private void clearFields() {
        if (state.get() == State.CREATE) {
            dtTmAufnahme.setToCurrentDateTime();
            dtTmEntlassung.setToCurrentDateTime();
        } else {
            dtTmAufnahme.setDateTime(null);
            dtTmEntlassung.setDateTime(null);
        }

        fallId.setText("");

        fallCreateTime.setText("");
        fallCreator.setText("");
        fallEditTime.setText("");
        fallEditor.setText("");

        fallEinweisenderArzt.setText("");
        fallSelbsteinweisung.setSelected(false);

        fallVersichertennummer.setText("");
        fallKasse.setValue(null);

        fallHauptdiagnose.setValue(null);
        fallHauptdiagnose.setItems(null);

        fallFallart.setValue(null);
    }

    /**
     * Copy the text entered in the views into a Fall object.
     * @param fall The object for copying the data into.
     */
    private void copyFieldDataIntoFall(Fall fall) {
        fall.setPatient(mainController.getPatientTablesController().getSelectedPatient());
        fall.setAufnahmeDatum(dtTmAufnahme.getDateTime());
        fall.setEntlassungsDatum(dtTmEntlassung.getDateTime());
        if (fallSelbsteinweisung.isSelected()) {
            fall.setSelbsteinweisung(true);
            fall.setEinweisenderArzt(null);
        } else {
            fall.setEinweisenderArzt(fallEinweisenderArzt.getText());
            fall.setSelbsteinweisung(false);
        }
        fall.setVersichertenNummer(fallVersichertennummer.getText());
        fall.setKasse(fallKasse.getValue());
        fall.setFallArt(fallFallart.getValue());

        if (fallHauptdiagnose.getSelectionModel().getSelectedItem() != null) {
            fall.setHauptdiagnoseId(fallHauptdiagnose.getSelectionModel().getSelectedItem().getDiagID());
        }


        //fall.setVorstellDatum();
    }

    /**
     * Set the field values in the view to the value of the {@link Fall} object.
     * @param fall The object whose data will be copied.
     */
    private void copyFallDataIntoField(Fall fall) {
        if (fall == null) {
            clearFields();
            return;
        }

        dtTmAufnahme.setDateTime(fall.getAufnahmeDatum());
        dtTmEntlassung.setDateTime(fall.getEntlassungsDatum());

        fallId.setText(fall.getFallID() + ""); //(fall.getPatient().getVorname()+" "+fall.getPatient().getNachname()); //TODO

        fallCreateTime.setText(fall.getErstellDatumZeit() != null ? fall.getErstellDatumZeit().toString() : "");
        fallCreator.setText(Integer.toString(fall.getErsteller()));
        fallEditTime.setText(fall.getBearbeitetDatumZeit() != null ? fall.getBearbeitetDatumZeit().toString() : "");
        fallEditor.setText(Integer.toString(fall.getBearbeiter()));


        fallEinweisenderArzt.setText(fall.getEinweisenderArzt());
        fallSelbsteinweisung.setSelected(fall.getSelbsteinweisung());

        fallVersichertennummer.setText(fall.getVersichertenNummer());
        fallKasse.setValue(fall.getKasse());


        copyHauptdiagnoseToComboBox(fall);
        fallFallart.setValue(fall.getFallArt());
    }

    /**
     * This method sets the main diagnosis in the ComboBox
     * @param fall The case whose main diagnosis will be picked
     */
    private void copyHauptdiagnoseToComboBox(Fall fall) {
        if (fallHauptdiagnose.getItems() == null
                || fall == null) {
            fallHauptdiagnose.setValue(null);
            return;
        }

        for (Diagnose diagnose : fallHauptdiagnose.getItems()) {
            System.out.println(diagnose.getDiagID() + "=" + fall.getHauptdiagnoseId());
            if (diagnose.getDiagID().equalsIgnoreCase(fall.getHauptdiagnoseId())) {
                fallHauptdiagnose.getSelectionModel().select(diagnose);
                return;
            }
        }
    }


    /**
     * State definitions.
     */
    public enum State {
        CREATE, EDIT, VIEW
    }



}