package org.jabref.gui.preferences.customentrytypes;

import java.util.List;
import java.util.Objects;
import java.util.function.Predicate;
import java.util.stream.Collectors;

import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;

import org.jabref.model.entry.BibEntryType;
import org.jabref.model.entry.field.Field;

import static org.jabref.gui.preferences.customentrytypes.FieldViewModel.Mandatory;

public class EntryTypeViewModel {

    private final ObjectProperty<BibEntryType> entryType = new SimpleObjectProperty<>();
    private final ObservableList<FieldViewModel> fields;

    public EntryTypeViewModel(BibEntryType entryType, Predicate<Field> isMultiline) {
        this.entryType.set(entryType);
        List<FieldViewModel> allFieldsForType = entryType.getAllBibFields()
                                                         .stream().map(bibField -> new FieldViewModel(bibField.field(),
                        entryType.isRequired(bibField.field()) ? Mandatory.REQUIRED : Mandatory.OPTIONAL,
                        bibField.priority(),
                        isMultiline.test(bibField.field())))
                                                         .collect(Collectors.toList());
        fields = FXCollections.observableArrayList(allFieldsForType);
    }

    @Override
    public int hashCode() {
        return Objects.hash(entryType, fields);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof EntryTypeViewModel other)) {
            return false;
        }
        return Objects.equals(entryType, other.entryType) && Objects.equals(fields, other.fields);
    }

    public void addField(FieldViewModel field) {
        this.fields.add(field);
    }

    public ObservableList<FieldViewModel> fields() {
        return this.fields;
    }

    public ObjectProperty<BibEntryType> entryType() {
        return this.entryType;
    }

    public void removeField(FieldViewModel focusedItem) {
        this.fields.remove(focusedItem);
    }

    @Override
    public String toString() {
        return "CustomEntryTypeViewModel [entryType=" + entryType + ", fields=" + fields + "]";
    }
}
