package me.lethunderhawk.minion.command;

import me.lethunderhawk.bazaarflux.util.command.CommandNode;
import me.lethunderhawk.bazaarflux.util.gui.InventoryManager;
import me.lethunderhawk.clans.ClanModule;
import me.lethunderhawk.minion.MinionModule;
import me.lethunderhawk.minion.manager.MinionManager;
import me.lethunderhawk.minion.ui.minionList.MinionLevelListMenu;
import me.lethunderhawk.minion.ui.minionList.MinionListMenu;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.command.TabCompleter;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.stream.Collectors;

public class MinionCommand implements CommandExecutor, TabCompleter {

    private final CommandNode rootCommand;
    private final MinionModule module;

    public MinionCommand(MinionModule minionModule) {
        this.module = minionModule;
        this.rootCommand = new CommandNode("clan", "Main clan command", null);
        setupDefaultCommands();
    }

    private void setupDefaultCommands() {
        registerCommand("all", "get all minions", this::getAll);
        registerCommand("reload", "reload", this::reload);
        registerCommand("removeAll", "remove all minions", this::removeAll);

        CommandNode menu = registerCommand("menu", "See all minion types in a GUI", this::showMenu);
            CommandNode cobble = new CommandNode("cobblestone", "See all cobblestone minions", this::showCobbleMenu);

        menu.addSubCommands(cobble);
    }

    private void showCobbleMenu(CommandSender sender, String[] strings) {
        if(sender instanceof Player p) {
            InventoryManager.openFor(p, new MinionLevelListMenu("cobblestone"));
        }
    }

    private void showMenu(CommandSender sender, String[] strings) {
        if(strings.length == 0 && sender instanceof Player p) {
            InventoryManager.openFor(p, new MinionListMenu());
        }
    }

    private void removeAll(CommandSender sender, String[] strings) {
        MinionManager.stopAndUnregisterAll();
    }

    private void reload(CommandSender sender, String[] strings) {
        module.reload();
    }

    private void getAll(CommandSender sender, String[] strings) {
        if(!(sender instanceof Player p)) return;
        for(ItemStack minion : module.getAllMinions()){
            p.getInventory().addItem(minion);
        }
    }

    // Helper method to easily register commands
    public CommandNode registerCommand(String name, String description, BiConsumer<CommandSender, String[]> executor) {
        return rootCommand.registerSubCommand(name, description, executor);
    }

    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if (args.length == 0) {
            sendHelp(sender);
            return true;
        }

        List<String> argList = new ArrayList<>(Arrays.asList(args));
        CommandNode currentNode = rootCommand;
        CommandNode targetNode = null;

        // Traverse the command tree
        while (!argList.isEmpty()) {
            String nextArg = argList.get(0);
            CommandNode nextNode = currentNode.getSubCommand(nextArg);

            if (nextNode == null) {
                // No matching subcommand found, use current node if it has an executor
                targetNode = currentNode.getExecutor() != null ? currentNode : null;
                break;
            }

            currentNode = nextNode;
            argList.remove(0);

            // If this is the last argument or node has no further subcommands
            if (argList.isEmpty() || nextNode.getSubCommands().isEmpty()) {
                targetNode = nextNode;
                break;
            }
        }

        if (targetNode == null) {
            ClanModule.sendText(sender,"§cUnknown command. Use /minion help for available commands.");
            return true;
        }

        if (targetNode.getExecutor() == null) {
            ClanModule.sendText(sender,"§cThis command requires additional arguments.");
            sendSubCommands(sender, targetNode);
            return true;
        }

        // Execute the command with remaining arguments
        String[] remainingArgs = argList.toArray(new String[0]);
        targetNode.getExecutor().accept(sender, remainingArgs);
        return true;
    }

    @Override
    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
        List<String> suggestions = new ArrayList<>();

        if (args.length == 0) {
            return suggestions;
        }

        // Start at root and traverse
        CommandNode currentNode = rootCommand;
        List<String> argList = new ArrayList<>(Arrays.asList(args));
        String lastArg = args[args.length - 1].toLowerCase();

        // Try to traverse as far as possible
        for (int i = 0; i < argList.size() - 1; i++) {
            String arg = argList.get(i);
            CommandNode nextNode = currentNode.getSubCommand(arg);
            if (nextNode == null) {
                break;
            }
            currentNode = nextNode;
        }

        // Get suggestions from current node
        if (currentNode.getTabCompleter() != null) {
            suggestions.addAll(currentNode.getTabCompleter().apply(sender, args));
        } else {
            // Suggest subcommands
            suggestions.addAll(currentNode.getSubCommandNames().stream()
                    .filter(name -> name.toLowerCase().startsWith(lastArg))
                    .collect(Collectors.toList()));
        }

        return suggestions;
    }

    private void sendHelp(CommandSender sender) {
        sender.sendMessage("§6=== Minion Commands ===");
        for (CommandNode cmd : rootCommand.getSubCommands()) {
            sender.sendMessage("§e/minion " + cmd.getName() + " §7- " + cmd.getDescription());
        }
    }

    private void sendSubCommands(CommandSender sender, CommandNode node) {
        sender.sendMessage("§6Available subcommands:");
        for (CommandNode subCmd : node.getSubCommands()) {
            sender.sendMessage("§e" + subCmd.getName() + " §7- " + subCmd.getDescription());
        }
    }
}