package net.knarcraft.permissionsigns;

import net.knarcraft.permissionsigns.command.PermissionSignsCommand;
import net.knarcraft.permissionsigns.command.PermissionSignsTabCompleter;
import net.knarcraft.permissionsigns.container.PermissionSign;
import net.knarcraft.permissionsigns.container.SignCreationRequest;
import net.knarcraft.permissionsigns.formatting.Translator;
import net.knarcraft.permissionsigns.listener.BlockListener;
import net.knarcraft.permissionsigns.listener.PlayerListener;
import net.knarcraft.permissionsigns.listener.SignListener;
import net.knarcraft.permissionsigns.manager.EconomyManager;
import net.knarcraft.permissionsigns.manager.PermissionManager;
import net.knarcraft.permissionsigns.manager.SignManager;
import net.knarcraft.permissionsigns.thread.PermissionTimeoutThread;
import net.knarcraft.permissionsigns.thread.SignCreationRequestTimeoutThread;
import net.knarcraft.permissionsigns.utility.UpdateChecker;
import net.milkbowl.vault.economy.Economy;
import net.milkbowl.vault.permission.Permission;
import org.bukkit.Bukkit;
import org.bukkit.command.PluginCommand;
import org.bukkit.configuration.file.FileConfiguration;
import org.bukkit.entity.Player;
import org.bukkit.plugin.PluginDescriptionFile;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.RegisteredServiceProvider;
import org.bukkit.plugin.ServicesManager;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.scheduler.BukkitScheduler;

import java.io.IOException;
import java.util.List;
import java.util.PriorityQueue;
import java.util.Queue;
import java.util.UUID;
import java.util.stream.Stream;

/*
PermissionSigns - A permission shop plugin for Spigot
Copyright (C) 2022 Kristian Knarvik (EpicKnarvik97)

The following license notice applies to all source and resource files in the PermissionSigns project:

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * The main permissionsigns class
 */
public final class PermissionSigns extends JavaPlugin {

    private static final Queue<SignCreationRequest> signCreationRequests = new PriorityQueue<>();
    private static String pluginVersion;
    private static PermissionSigns instance;
    private static boolean perWorldPermissions;
    private static boolean enableExtensiveSignProtection;
    private static boolean enableIndirectSignProtection;
    private static boolean removePermissionSignIfMissing;

    /**
     * Instantiates the permission signs class
     */
    @SuppressWarnings("unused")
    public PermissionSigns() {
        super();
        instance = this;
    }

    /**
     * Gets an instance of this plugin
     *
     * @return <p>An instance of this plugin</p>
     */
    public static PermissionSigns getInstance() {
        return instance;
    }

    /**
     * Gets the version of this plugin
     *
     * @return <p>This plugin's version</p>
     */
    public static String getPluginVersion() {
        return pluginVersion;
    }

    /**
     * Adds a new sign creation request
     *
     * @param player <p>The player that initiated the sign creation</p>
     * @param sign   <p>The sign the player is about to create</p>
     */
    public static void addSignCreationRequest(Player player, PermissionSign sign) {
        signCreationRequests.add(new SignCreationRequest(sign, player, System.currentTimeMillis()));
    }

    /**
     * Gets the sign creation request for the player with the given UUID
     *
     * @param uuid <p>The UUID to get a sign creation request for</p>
     * @return <p>A sign creation request, or null if the UUID is not found</p>
     */
    public static SignCreationRequest getSignCreationRequest(UUID uuid) {
        Stream<SignCreationRequest> matchingRequests = signCreationRequests.stream().filter(
                (item) -> item.getPlayer().getUniqueId().equals(uuid));
        List<SignCreationRequest> requestList = matchingRequests.toList();
        if (!requestList.isEmpty()) {
            return requestList.get(0);
        } else {
            return null;
        }
    }

    /**
     * Cancels the sign creation request triggered by the user
     *
     * @param uuid <p>The UUID of the player to cancel the request for</p>
     */
    public static void cancelSignCreationRequest(UUID uuid) {
        Stream<SignCreationRequest> matchingRequests = signCreationRequests.stream().filter(
                (item) -> item.getPlayer().getUniqueId().equals(uuid));
        List<SignCreationRequest> requestList = matchingRequests.toList();
        if (requestList.size() > 0) {
            signCreationRequests.remove(requestList.get(0));
        }
    }

    /**
     * Checks whether permissions should always be set for the world the sign belongs to
     *
     * @return <p>Whether permissions should be set for the current world</p>
     */
    public static boolean usePerWorldPermissions() {
        return perWorldPermissions;
    }

    /**
     * Gets whether permission signs on falling blocks should be protected
     *
     * @return <p>Whether permission signs on falling blocks should be protected</p>
     */
    public static boolean extensiveSignProtectionEnabled() {
        return enableExtensiveSignProtection;
    }

    /**
     * Gets whether permission sign explosion and piston protection is enabled
     *
     * @return <p>Whether permission sign explosion and piston protection is enabled</p>
     */
    public static boolean indirectProtectionEnabled() {
        return enableIndirectSignProtection;
    }

    /**
     * Gets whether to remove permissions signs if their physical signs are missing
     *
     * @return <p>Whether tor remove permission signs if their signs are missing</p>
     */
    public static boolean removePermissionSignIfMissing() {
        return removePermissionSignIfMissing;
    }

    @Override
    public void reloadConfig() {
        super.reloadConfig();
        Translator.loadLanguages(loadConfig());
    }

    @Override
    public void onEnable() {
        //Check if vault is loaded
        setupVault();

        //Get plugin info
        PluginDescriptionFile pluginDescriptionFile = this.getDescription();
        pluginVersion = pluginDescriptionFile.getVersion();

        //Load config and write the default config if necessary
        FileConfiguration config = this.getConfig();
        this.saveDefaultConfig();
        config.options().copyDefaults(true);
        Translator.loadLanguages(loadConfig());

        registerListeners();
        registerCommands();
        runThreads();

        SignManager.loadSigns();
        PermissionManager.loadTemporaryPermissions();

        UpdateChecker.checkForUpdate(this, "https://api.spigotmc.org/legacy/update.php?resource=99426",
                () -> pluginVersion, null);
    }

    /**
     * Loads the config file
     *
     * @return <p>The currently selected language</p>
     */
    private String loadConfig() {
        FileConfiguration config = this.getConfig();
        String language = config.getString("language", "en");
        perWorldPermissions = config.getBoolean("perWorldPermissions", false);
        enableExtensiveSignProtection = config.getBoolean("enableExtensiveSignProtection", false);
        enableIndirectSignProtection = config.getBoolean("enableIndirectSignProtection", true);
        removePermissionSignIfMissing = config.getBoolean("removePermissionSignIfMissing", true);
        saveConfig();
        return language;
    }

    /**
     * Starts all separate threads for executing tasks
     */
    private void runThreads() {
        BukkitScheduler scheduler = Bukkit.getScheduler();
        scheduler.runTaskTimer(this, new SignCreationRequestTimeoutThread(signCreationRequests), 0L, 100L);
        scheduler.runTaskTimer(this, new PermissionTimeoutThread(), 0L, 25L);
    }

    /**
     * Registers all necessary listeners
     */
    private void registerListeners() {
        PluginManager pluginManager = getServer().getPluginManager();
        pluginManager.registerEvents(new SignListener(), this);
        pluginManager.registerEvents(new PlayerListener(), this);
        pluginManager.registerEvents(new BlockListener(), this);
    }

    /**
     * Sets up Vault by getting plugins from their providers
     */
    private void setupVault() {
        ServicesManager servicesManager = this.getServer().getServicesManager();
        RegisteredServiceProvider<Permission> permissionProvider = servicesManager.getRegistration(Permission.class);
        RegisteredServiceProvider<Economy> economyProvider = servicesManager.getRegistration(Economy.class);
        if (permissionProvider != null && economyProvider != null) {
            EconomyManager.initialize(economyProvider.getProvider());
            PermissionManager.initialize(permissionProvider.getProvider());
        } else {
            throw new IllegalStateException("[PermissionSigns] Error: Vault could not be loaded");
        }
    }

    /**
     * Registers a command for this plugin
     */
    private void registerCommands() {
        PluginCommand permissionSignsCommand = this.getCommand("permissionsigns");
        if (permissionSignsCommand != null) {
            permissionSignsCommand.setExecutor(new PermissionSignsCommand());
            permissionSignsCommand.setTabCompleter(new PermissionSignsTabCompleter());
        }
    }

    @Override
    public void onDisable() {
        try {
            SignManager.saveSigns();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}