/*
 * This file is a part of the SteamWar software.
 *
 * Copyright (C) 2022  SteamWar.de-Serverteam
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package de.steamwar.command;

import lombok.NonNull;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import java.util.function.Function;

public class PreviousArguments {

    public final String[] userArgs;
    public final Object[] mappedArgs;
    public final boolean hasMoreArguments;
    private final Function<String, Object> getByNameFunction;
    private boolean usedOptionalValue = false;

    public PreviousArguments(String[] userArgs, Object[] mappedArgs, boolean hasMoreArguments, Function<String, Object> getByNameFunction) {
        this.userArgs = userArgs;
        this.mappedArgs = mappedArgs;
        this.hasMoreArguments = hasMoreArguments;
        this.getByNameFunction = getByNameFunction;
    }

    public boolean hasUsedOptionalValue() {
        return usedOptionalValue;
    }

    public void usedOptionalValue() {
        this.usedOptionalValue = true;
    }

    public String getUserArg(int index) {
        return userArgs[userArgs.length - index - 1];
    }

    public <T> T getMappedArg(int index) {
        return (T) mappedArgs[mappedArgs.length - index - 1];
    }

    public <T> Optional<T> getFirst(Class<T> clazz) {
        for (Object o : mappedArgs) {
            if (clazz.isInstance(o)) {
                return Optional.of((T) o);
            }
        }
        return Optional.empty();
    }

    public <T> List<T> getAll(Class<T> clazz) {
        List<T> list = new ArrayList<>();
        for (Object o : mappedArgs) {
            if (clazz.isInstance(o)) {
                list.add((T) o);
            }
            if (o == null) {
                continue;
            }
            if (o.getClass().isArray()) {
                Object[] array = (Object[]) o;
                if (array.length == 0) {
                    continue;
                }
                for (Object o1 : array) {
                    if (clazz.isInstance(o1)) {
                        list.add((T) o1);
                    }
                }
            }
        }
        return list;
    }

    public <T> T getByName(@NonNull String name) {
        return (T) getByNameFunction.apply(name);
    }
}