package me.mrCookieSlime.Slimefun.api;

import java.util.logging.Logger;

import org.bukkit.Bukkit;
import org.bukkit.NamespacedKey;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.scheduler.BukkitTask;

import io.github.thebusybiscuit.cscorelib2.config.Config;
import io.github.thebusybiscuit.slimefun4.api.items.ItemSetting;
import io.github.thebusybiscuit.slimefun4.api.player.PlayerProfile;
import io.github.thebusybiscuit.slimefun4.implementation.items.VanillaItem;
import me.mrCookieSlime.Slimefun.SlimefunPlugin;
import me.mrCookieSlime.Slimefun.Objects.Research;
import me.mrCookieSlime.Slimefun.Objects.SlimefunItem.ItemState;
import me.mrCookieSlime.Slimefun.Objects.SlimefunItem.SlimefunItem;

/**
 * Provides a few convenience methods.
 *
 * @since 4.0
 */
public final class Slimefun {

    private Slimefun() {}

    public static Logger getLogger() {
        return SlimefunPlugin.instance.getLogger();
    }

    /**
     * Returns the value associated to this key for the SlimefunItem corresponding to this id.
     *
     * @deprecated Please use the {@link ItemSetting} API instead.
     *
     * @param id
     *            the id of the SlimefunItem, not null
     * @param key
     *            the key of the value to get, not null
     *
     * @return the value associated to the key for the SlimefunItem corresponding to the id,
     *         or null if it doesn't exist.
     */
    @Deprecated
    public static Object getItemValue(String id, String key) {
        return getItemConfig().getValue(id + '.' + key);
    }

    /**
     * Returns the {@link Config} instance of our Items.yml file.
     *
     * @deprecated Do not access this directly, use the {@link ItemSetting} API instead.
     *
     * @return the Items.yml Config instance.
     */
    @Deprecated
    public static Config getItemConfig() {
        return SlimefunPlugin.getItemCfg();
    }

    /**
     * Registers this Research and automatically binds these ItemStacks to it.
     * <p>
     * This convenience method spares from doing the code below:
     * 
     * <pre>
     *     {@code
     *		Research r = new Research(7, "Glowstone Armor", 3);
     *		r.addItems(SlimefunItem.getByItem(SlimefunItems.GLOWSTONE_HELMET),
     *		           SlimefunItem.getByItem(SlimefunItems.GLOWSTONE_CHESTPLATE),
     *		           SlimefunItem.getByItem(SlimefunItems.GLOWSTONE_LEGGINGS),
     *		           SlimefunItem.getByItem(SlimefunItems.GLOWSTONE_BOOTS));
     *		r.register();
     *     }*
     * </pre>
     * 
     * @param research
     *            the research to register, not null
     * @param items
     *            the items to bind, not null
     */
    public static void registerResearch(Research research, ItemStack... items) {
        for (ItemStack item : items) {
            research.addItems(SlimefunItem.getByItem(item));
        }

        research.register();
    }

    public static void registerResearch(NamespacedKey key, int id, String name, int cost, ItemStack... items) {
        Research research = new Research(key, id, name, cost);

        for (ItemStack item : items) {
            research.addItems(SlimefunItem.getByItem(item));
        }

        research.register();
    }

    /**
     * Checks if this player can use this item.
     *
     * @param p
     *            the player to check, not null
     * @param item
     *            the item to check, not null
     * @param message
     *            whether a message should be sent to the player or not
     *
     * @return <code>true</code> if the item is a SlimefunItem, enabled, researched and if the player has the permission
     *         to use it,
     *         <code>false</code> otherwise.
     */
    public static boolean hasUnlocked(Player p, ItemStack item, boolean message) {
        SlimefunItem sfItem = SlimefunItem.getByItem(item);

        if (sfItem != null) {
            if (sfItem.getState() == ItemState.DISABLED) {
                if (message) SlimefunPlugin.getLocal().sendMessage(p, "messages.disabled-item", true);
                return false;
            }

            if (isEnabled(p, item, message) && hasPermission(p, sfItem, message)) {
                if (sfItem.getResearch() == null) return true;
                else if (PlayerProfile.get(p).hasUnlocked(sfItem.getResearch())) return true;
                else {
                    if (message && !(sfItem instanceof VanillaItem)) {
                        SlimefunPlugin.getLocal().sendMessage(p, "messages.not-researched", true);
                    }

                    return false;
                }
            }
            else return false;
        }
        else return true;
    }

    /**
     * Checks if this player can use this item.
     *
     * @param p
     *            the player to check, not null
     * @param sfItem
     *            the item to check, not null
     * @param message
     *            whether a message should be sent to the player or not
     *
     * @return <code>true</code> if the item is enabled, researched and the player has the permission to use it,
     *         <code>false</code> otherwise.
     */
    public static boolean hasUnlocked(Player p, SlimefunItem sfItem, boolean message) {
        if (isEnabled(p, sfItem, message) && hasPermission(p, sfItem, message)) {
            if (sfItem.getResearch() == null) {
                return true;
            }
            else if (PlayerProfile.get(p).hasUnlocked(sfItem.getResearch())) {
                return true;
            }
            else {
                if (message && !(sfItem instanceof VanillaItem)) {
                    SlimefunPlugin.getLocal().sendMessage(p, "messages.not-researched", true);
                }

                return false;
            }
        }
        return false;
    }

    /**
     * Checks if this player has the permission to use this item.
     *
     * @param p
     *            the player to check, not null
     * @param item
     *            the item to check, null returns <code>true</code>
     * @param message
     *            whether a message should be sent to the player or not
     *
     * @return <code>true</code> if the item is not null and if the player has the permission to use it,
     *         <code>false</code> otherwise.
     */
    public static boolean hasPermission(Player p, SlimefunItem item, boolean message) {
        if (item == null) {
            return true;
        }
        else if (SlimefunPlugin.getPermissionsService().hasPermission(p, item)) {
            return true;
        }
        else {
            if (message) {
                SlimefunPlugin.getLocal().sendMessage(p, "messages.no-permission", true);
            }

            return false;
        }
    }

    /**
     * Checks if this item is enabled in the world this player is in.
     *
     * @param p
     *            the player to get the world he is in, not null
     * @param item
     *            the item to check, not null
     * @param message
     *            whether a message should be sent to the player or not
     *
     * @return <code>true</code> if the item is a SlimefunItem and is enabled in the world the player is in,
     *         <code>false</code> otherwise.
     */
    public static boolean isEnabled(Player p, ItemStack item, boolean message) {
        SlimefunItem sfItem = SlimefunItem.getByItem(item);

        return sfItem == null || isEnabled(p, sfItem, message);
    }

    /**
     * Checks if this item is enabled in the world this player is in.
     *
     * @param p
     *            the player to get the world he is in, not null
     * @param sfItem
     *            the item to check, not null
     * @param message
     *            whether a message should be sent to the player or not
     *
     * @return <code>true</code> if the item is enabled in the world the player is in,
     *         <code>false</code> otherwise.
     */
    public static boolean isEnabled(Player p, SlimefunItem sfItem, boolean message) {
        if (sfItem.isDisabled()) {
            if (message) {
                SlimefunPlugin.getLocal().sendMessage(p, "messages.disabled-item", true);
            }

            return false;
        }
        else if (!SlimefunPlugin.getWorldSettingsService().isEnabled(p.getWorld(), sfItem)) {
            if (message) {
                SlimefunPlugin.getLocal().sendMessage(p, "messages.disabled-in-world", true);
            }

            return false;
        }
        return true;
    }

    public static BukkitTask runSync(Runnable r) {
        return Bukkit.getScheduler().runTask(SlimefunPlugin.instance, r);
    }

    public static BukkitTask runSync(Runnable r, long delay) {
        return Bukkit.getScheduler().runTaskLater(SlimefunPlugin.instance, r, delay);
    }
}