package cc.fascinated.account;

import cc.fascinated.Aetheria;
import cc.fascinated.utils.Manager;
import lombok.extern.log4j.Log4j2;
import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.event.server.PluginDisableEvent;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Log4j2
public class AccountManager extends Manager {

    private final long SAVE_INTERVAL = 5; // in minutes
    private static final Map<UUID, Account> ACCOUNTS = new HashMap<>();

    public AccountManager() {
        for (Player player : Bukkit.getOnlinePlayers()) {
            registerAccount(player);
        }

        Bukkit.getAsyncScheduler().runAtFixedRate(Aetheria.INSTANCE, (task) -> {
            this.saveAccounts();
        }, SAVE_INTERVAL, SAVE_INTERVAL, TimeUnit.MINUTES);
    }

    /**
     * Gets the account for the specified player.
     *
     * @param player the player
     * @return the account
     */
    public static Account getAccount(Player player) {
        UUID uuid = player.getUniqueId();
        if (!ACCOUNTS.containsKey(uuid)) {
            return registerAccount(player);
        }
        return ACCOUNTS.get(uuid);
    }

    /**
     * Checks if an account is already registered for the specified player.
     *
     * @param player the player
     * @return true if the account is already registered, false otherwise
     */
    private boolean accountRegistered(Player player) {
        return ACCOUNTS.containsKey(player.getUniqueId());
    }

    /**
     * Registers an account for the specified player.
     *
     * @param player the player
     */
    private static Account registerAccount(Player player) {
        UUID uuid = player.getUniqueId();
        Account account = new Account(player);
        ACCOUNTS.put(uuid, account);
        return account;
    }

    /**
     * Save all accounts to disk.
     */
    private void saveAccounts() {
        long before = System.currentTimeMillis();
        log.info("Saving accounts...");
        for (Account account : ACCOUNTS.values()) {
            account.save(true); // Save the account
        }
        log.info("Saved {} accounts. ({}ms)", ACCOUNTS.size(), System.currentTimeMillis() - before);
    }

    @EventHandler
    public void onJoin(PlayerJoinEvent event) {
        Player player = event.getPlayer();
        if (accountRegistered(player)) { // Account already registered
            return;
        }
        registerAccount(player);
    }

    @EventHandler
    public void onQuit(PlayerQuitEvent event) {
        Player player = event.getPlayer();
        Account account = getAccount(player);
        account.save(true);

        ACCOUNTS.remove(player.getUniqueId());
    }

    @EventHandler
    public void onPluginDisable(PluginDisableEvent event) {
        if (event.getPlugin() != Aetheria.INSTANCE) {
            return;
        }

        this.saveAccounts(); // Save the accounts to disk
        ACCOUNTS.clear(); // Remove the accounts from the cache
    }
}