package net.knarcraft.placeholdersigns.command;

import net.knarcraft.knarlib.formatting.StringFormatter;
import net.knarcraft.placeholdersigns.PlaceholderSigns;
import net.knarcraft.placeholdersigns.config.PlaceholderSignMessage;
import net.knarcraft.placeholdersigns.container.SignLineChangeRequest;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.command.TabExecutor;
import org.bukkit.entity.Player;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.ArrayList;
import java.util.List;

/**
 * A command for setting a sign's text to anything longer than normally possible
 */
public class EditSignCommand implements TabExecutor {

    private static final List<String> lineNumbers;

    static {
        lineNumbers = new ArrayList<>();
        for (int i = 1; i < 5; i++) {
            lineNumbers.add(String.valueOf(i));
        }
    }

    @Override
    public boolean onCommand(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s,
                             @NotNull String[] args) {
        PlaceholderSigns placeholderSigns = PlaceholderSigns.getInstance();
        StringFormatter stringFormatter = placeholderSigns.getStringFormatter();
        if (!(commandSender instanceof Player player)) {
            stringFormatter.displayErrorMessage(commandSender, PlaceholderSignMessage.ERROR_PLAYER_ONLY);
            return false;
        }
        if (args.length < 1) {
            return false;
        }

        // Parse the specified line number
        int lineNumber;
        try {
            lineNumber = Integer.parseInt(args[0]);
            if (lineNumber < 0 || lineNumber > 4) {
                return false;
            }
        } catch (NumberFormatException exception) {
            return false;
        }

        // Make sure no argument is treated as an empty string
        String start;
        if (args.length > 1) {
            start = args[1];
        } else {
            start = "";
        }

        // Get all arguments as a space-separated string
        StringBuilder builder = new StringBuilder(start);
        for (int i = 2; i < args.length; i++) {
            builder.append(" ").append(args[i]);
        }

        // Register the line change request
        SignLineChangeRequest request = new SignLineChangeRequest(player, lineNumber - 1, builder.toString());
        placeholderSigns.getRequestHandler().addSignChangeRequest(request);

        stringFormatter.displaySuccessMessage(commandSender, PlaceholderSignMessage.SUCCESS_CLICK_SIGN_TO_EDIT);
        return true;
    }

    @Nullable
    @Override
    public List<String> onTabComplete(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s,
                                      @NotNull String[] args) {
        if (args.length == 1) {
            return lineNumbers;
        } else {
            return new ArrayList<>();
        }
    }

}