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package org.jf.util.jcommander;

import com.beust.jcommander.JCommander;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import org.jf.util.ConsoleUtil;

import javax.annotation.Nonnull;
import java.util.List;

public abstract class Command {

    @Nonnull
    protected final List<JCommander> commandAncestors;

    public Command(@Nonnull List<JCommander> commandAncestors) {
        this.commandAncestors = commandAncestors;
    }

    public void usage() {
        System.out.println(new HelpFormatter()
                .width(ConsoleUtil.getConsoleWidth())
                .format(getCommandHierarchy()));
    }

    protected void setupCommand(JCommander jc) {
    }

    protected JCommander getJCommander() {
        JCommander parentJc = Iterables.getLast(commandAncestors);
        return parentJc.getCommands().get(this.getClass().getAnnotation(ExtendedParameters.class).commandName());
    }

    public List<JCommander> getCommandHierarchy() {
        List<JCommander> commandHierarchy = Lists.newArrayList(commandAncestors);
        commandHierarchy.add(getJCommander());
        return commandHierarchy;
    }

    public abstract void run();
}