package net.knarcraft.paidsigns.command;

import net.knarcraft.paidsigns.PaidSigns;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.command.PluginCommand;
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;

public class PaidSignsTabCommand implements TabExecutor {

    private static final ChatColor successColor = ChatColor.GREEN;
    private static final ChatColor commandColor = ChatColor.YELLOW;

    @Override
    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
        sender.sendMessage(commandColor + "[] denote optional parameters");
        sender.sendMessage(commandColor + "<> denote required parameters");
        sender.sendMessage(commandColor + "{} denote required permission");
        sender.sendMessage(commandColor + "In some cases, commands with required parameters can be called with no parameters");
        if (sender instanceof Player) {
            showPlayerCommands(sender);
        }
        return true;
    }

    /**
     * Shows all commands available to the sending player
     *
     * @param sender <p>The player which sent the command</p>
     */
    private void showPlayerCommands(CommandSender sender) {
        sender.sendMessage(commandColor + "Commands:");

        showCommandInfo("addPaidSign", sender);
        showCommandInfo("addPaidSignCondition", sender);
        showCommandInfo("listPaidSigns", sender);
        showCommandInfo("editPaidSign", sender);
        showCommandInfo("removePaidSignCondition", sender);
        showCommandInfo("removePaidSign", sender);
        showCommandInfo("reload", sender);
    }

    /**
     * Shows information about the given command
     *
     * @param command <p>The command to get information about</p>
     * @param sender  <p>The sender asking to see command info</p>
     */
    private void showCommandInfo(String command, CommandSender sender) {
        PluginCommand pluginCommand = PaidSigns.getInstance().getCommand(command);
        if (pluginCommand != null) {
            String permission = pluginCommand.getPermission();
            if (permission == null || sender.hasPermission(permission)) {
                String commandInfo = "\n" + commandColor + pluginCommand.getUsage().replace("<command>",
                        pluginCommand.getName()) + ": " + successColor + pluginCommand.getDescription();
                if (sender.hasPermission("paidsigns.admin")) {
                    if (permission == null) {
                        permission = "None";
                    }
                    commandInfo += commandColor + " {" + permission + "}";
                }
                sender.sendMessage(commandInfo);
            }
        }
    }

    @Nullable
    @Override
    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label,
                                      @NotNull String[] args) {
        return new ArrayList<>();
    }

}