package dev.loki.killer;

import dev.loki.config.GameConfig;
import dev.loki.config.MessagesConfig;
import dev.loki.mdbd;
import dev.loki.objective.Generator;
import dev.loki.objective.GeneratorManager;
import dev.loki.player.Killer;
import net.kyori.adventure.text.Component;
import org.bukkit.Bukkit;
import org.bukkit.Sound;
import org.bukkit.entity.Player;
import org.bukkit.plugin.Plugin;
import org.bukkit.scheduler.BukkitRunnable;
import org.bukkit.scheduler.BukkitTask;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

/**
 * Killer generator kick: Killer holds Shift near a generator for
 * kick-charge-seconds (default 3), then the generator loses
 * kick-regression-percent (default 20%) progress.
 *
 * A shared cooldown of kick-cooldown-seconds applies to ALL generators.
 */
public class GeneratorKick {

    private final Plugin plugin;
    private final GameConfig config;
    private final GeneratorManager generatorManager;
    private final MessagesConfig messages;

    /** UUID → ongoing charging task */
    private final Map<UUID, BukkitTask> chargingTasks = new HashMap<>();

    /** Shared cooldown across all generators: remaining ticks */
    private int globalCooldownTicks = 0;
    private BukkitTask cooldownTask;

    /** Pending unblock tasks — cancelled on shutdown to avoid ghost tasks */
    private final List<BukkitTask> pendingUnblockTasks = new ArrayList<>();

    public GeneratorKick(Plugin plugin, GameConfig config, GeneratorManager generatorManager) {
        this.plugin           = plugin;
        this.config           = config;
        this.generatorManager = generatorManager;
        this.messages         = mdbd.getInstance().getConfigManager().getMessages();
    }

    // -------------------------------------------------------------------------
    // Public API — called when killer starts/stops sneaking near a generator
    // -------------------------------------------------------------------------

    /** Call when killer starts holding Shift near a generator. */
    public boolean startCharging(Killer killer) {
        UUID uuid = killer.getUuid();
        if (chargingTasks.containsKey(uuid)) return false; // already charging
        if (globalCooldownTicks > 0) {
            Player p = killer.getPlayer();
            if (p != null) {
                int secsLeft = (int) Math.ceil(globalCooldownTicks / 20.0);
                p.sendMessage(messages.get("generator.kicked.cooldown", secsLeft));
            }
            return false;
        }

        Player p = killer.getPlayer();
        if (p == null) return false;

        Generator gen = generatorManager.getNearestGenerator(p.getLocation(),
            config.getGeneratorInteractionRange());
        if (gen == null || !gen.canBeRepaired()) return false;
        if (gen.getProgress() <= 0) {
            if (p.isOnline()) {
                p.sendMessage(messages.get("generator.kicked.already-broken"));
            }
            return false;
        }

        int chargeTicks = config.getKickChargeSeconds() * 20;

        BukkitTask task = new BukkitRunnable() {
            int elapsed = 0;

            @Override
            public void run() {
                Player player = killer.getPlayer();
                if (player == null || !player.isOnline() || !player.isSneaking()) {
                    stopCharging(killer.getUuid());
                    cancel();
                    return;
                }

                // Still near the same generator?
                Generator g = generatorManager.getNearestGenerator(player.getLocation(),
                    config.getGeneratorInteractionRange());
                if (g == null || g != gen) {
                    stopCharging(killer.getUuid());
                    cancel();
                    return;
                }

                elapsed++;
                double pct = (double) elapsed / chargeTicks * 100;
                player.sendActionBar(messages.get("generator.kicked.actionbar", (int) pct));

                if (elapsed >= chargeTicks) {
                    executeKick(killer, gen);
                    cancel();
                }
            }
        }.runTaskTimer(plugin, 1L, 1L);

        chargingTasks.put(uuid, task);
        if (p.isOnline()) p.sendMessage(messages.get("generator.kicked.begin"));
        return true;
    }

    /** Call when killer releases Shift or moves away. */
    public void stopCharging(UUID killerUuid) {
        BukkitTask task = chargingTasks.remove(killerUuid);
        if (task != null) {
            task.cancel();
            Player p = Bukkit.getPlayer(killerUuid);
            if (p != null && p.isOnline()) {
                p.sendActionBar(Component.empty());
            }
        }
    }

    public boolean isCharging(UUID killerUuid) {
        return chargingTasks.containsKey(killerUuid);
    }

    public void shutdown() {
        for (BukkitTask t : chargingTasks.values()) t.cancel();
        chargingTasks.clear();
        if (cooldownTask != null) { cooldownTask.cancel(); cooldownTask = null; }
        for (BukkitTask t : pendingUnblockTasks) t.cancel();
        pendingUnblockTasks.clear();
    }

    // -------------------------------------------------------------------------
    // Private
    // -------------------------------------------------------------------------

    private void executeKick(Killer killer, Generator gen) {
        chargingTasks.remove(killer.getUuid());

        // Remove 20% progress (or configured percent) and STOP — no continuous regression
        double regPct = config.getKickRegressionPercent();
        double current = gen.getProgress();
        double newProg  = Math.max(0, current - regPct);
        gen.setProgress(newProg);
        // Block generator from repair for the cooldown duration
        gen.setBlocked(true);

        Player p = killer.getPlayer();
        if (p != null && p.isOnline()) {
            p.sendActionBar(Component.empty());
            p.sendMessage(messages.get("generator.kicked.success", (int) regPct));
            p.getWorld().playSound(p.getLocation(), Sound.ENTITY_GENERIC_EXPLODE, 0.6f, 1.3f);
        }

        // Notify all players
        Bukkit.broadcast(messages.get("generator.kicked.broadcast", (int) regPct));

        // Unblock generator after kick-duration (separate from global cooldown)
        int unblockTicks = config.getKickDuration() * 20;
        BukkitTask unblockTask = plugin.getServer().getScheduler().runTaskLater(plugin, () -> {
            gen.setBlocked(false);
        }, unblockTicks);
        pendingUnblockTasks.add(unblockTask);

        // Start global kick cooldown
        startGlobalCooldown();
    }

    private void startGlobalCooldown() {
        globalCooldownTicks = config.getKickCooldownSeconds() * 20;
        if (cooldownTask != null) { cooldownTask.cancel(); }
        cooldownTask = new BukkitRunnable() {
            @Override
            public void run() {
                if (globalCooldownTicks > 0) {
                    globalCooldownTicks -= 20;
                } else {
                    globalCooldownTicks = 0;
                    cancel();
                    cooldownTask = null;
                }
            }
        }.runTaskTimer(plugin, 20L, 20L);
    }
}