package com.ts3client.ui;

import com.ts3client.config.IdentityEntry;
import com.ts3client.config.IdentityStore;

import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JList;
import java.awt.Component;

/**
 * Drop-down for picking the identity to connect with. Optionally offers a
 * "use the default identity" entry for places where the choice may stay unset
 * (bookmarks), so changing the default later applies retroactively.
 */
final class IdentityChooser extends JComboBox<Object> {

    private static final String USE_DEFAULT = "‹Default identity›";

    private final IdentityStore identities;
    private final boolean allowDefault;

    IdentityChooser(IdentityStore identities, boolean allowDefault, String selectedId) {
        this.identities = identities;
        this.allowDefault = allowDefault;
        if (allowDefault) addItem(USE_DEFAULT);
        for (IdentityEntry e : identities.all()) addItem(e);

        setSelectedIdentityId(selectedId);

        setRenderer(new DefaultListCellRenderer() {
            @Override
            public Component getListCellRendererComponent(JList<?> list, Object value, int index,
                                                          boolean isSelected, boolean cellHasFocus) {
                String text = value instanceof IdentityEntry
                        ? ((IdentityEntry) value).getName()
                        : String.valueOf(value);
                return super.getListCellRendererComponent(list, text, index, isSelected, cellHasFocus);
            }
        });
    }

    /** Selected identity id, or an empty string when the default is to be used. */
    String getSelectedIdentityId() {
        Object v = getSelectedItem();
        return v instanceof IdentityEntry ? ((IdentityEntry) v).getId() : "";
    }

    /** Selects the identity with the given id, falling back to the default entry. */
    void setSelectedIdentityId(String id) {
        IdentityEntry selected = identities.byId(id);
        if (selected != null) {
            setSelectedItem(selected);
        } else if (allowDefault) {
            setSelectedItem(USE_DEFAULT);
        }
    }
}