package inf101.v18.rogue101.items;

import inf101.v18.rogue101.game.IGame;
import inf101.v18.rogue101.objects.IItem;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Backpack implements IContainer {
    /**
     * A list containing everything in the backpack.
     */
    private final List<IItem> content = new ArrayList<>();
    /**
     * The maximum amount of items allowed in a single backpack.
     */
    private final int MAX_SIZE = 5;

    @Override
    public int getCurrentHealth() {
        return 0;
    }

    @Override
    public int getDefence() {
        return 0;
    }

    @Override
    public int getMaxHealth() {
        return 0;
    }

    @Override
    public String getName() {
        return "Backpack";
    }

    @Override
    public int getSize() {
        return 20;
    }

    @Override
    public String getSymbol() {
        return "B";
    }

    @Override
    public int handleDamage(IGame game, IItem source, int amount) {
        return 0;
    }

    /**
     * Retrieves the current size of the Backpack.
     *
     * @return The size
     */
    public int size() {
        return content.size();
    }

    /**
     * Checks if the Backpack is empty
     *
     * @return  True if empty. False otherwise
     */
    public boolean isEmpty() {
        return content.isEmpty();
    }

    /**
     * Tries to add an item to the Backpack
     *
     * @param item  The item to add
     * @return      True if the item was added. False if the backpack is full
     */
    public boolean add(IItem item) {
        if (size() < MAX_SIZE) {
            content.add(item);
            return true;
        } else {
            return false;
        }
    }

    @Override
    public void remove(int i) {
        content.remove(i);
    }

    /**
     * Removes item from the backpack.
     *
     * @param item  The item to remove
     */
    public void remove(IItem item) {
        content.remove(item);
    }

    /**
     * Gets a T at index i,
     *
     * @param i The index of an element
     * @return  An object of type T
     */
    public IItem get(int i) {
        return content.get(i);
    }

    @Override
    public boolean addItem(IItem item) {
        if (content.size() < MAX_SIZE) {
            content.add(item);
            return true;
        } else {
            return false;
        }
    }

    /**
     * Gets the content List for direct manipulation.
     *
     * @return  A list of T
     */
    public List<IItem> getContent() {
        return Collections.unmodifiableList(content);
    }

    @Override
    public boolean hasSpace() {
        return size() < MAX_SIZE;
    }

    @Override
    public IItem getFirst(Class<?> clazz) {
        for (IItem item : content) {
            if (clazz.isInstance(item)) {
                return item;
            }
        }
        return null;
    }
}