/* NickServ core functions
 *
 * (C) 2003-2025 Anope Team
 * Contact us at team@anope.org
 *
 * Please read COPYING and README for further details.
 *
 * Based on the original code of Epona by Lara.
 * Based on the original code of Services by Andy Church.
 */

#include "module.h"

class CommandNSDrop final
	: public Command
{
private:
	PrimitiveExtensibleItem<Anope::string> dropcode;

public:
	CommandNSDrop(Module *creator)
		: Command(creator, "nickserv/drop", 1, 2)
		, dropcode(creator, "nickname-dropcode")
	{
		this->SetSyntax(_("\037nickname\037 [\037code\037]"));
		this->SetDesc(_("Cancel the registration of a nickname"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) override
	{
		const Anope::string &nick = params[0];

		if (Anope::ReadOnly && !source.HasPriv("nickserv/drop"))
		{
			source.Reply(READ_ONLY_MODE);
			return;
		}

		NickAlias *na = NickAlias::Find(nick);
		if (!na)
		{
			source.Reply(NICK_X_NOT_REGISTERED, nick.c_str());
			return;
		}

		bool is_mine = source.GetAccount() == na->nc;

		if (!is_mine && !source.HasPriv("nickserv/drop"))
		{
			source.Reply(ACCESS_DENIED);
			return;
		}

		if (Config->GetModule("nickserv").Get<bool>("secureadmins", "yes") && !is_mine && na->nc->IsServicesOper())
		{
			source.Reply(_("You may not drop other Services Operators' nicknames."));
			return;
		}

		if (na->nc->na == na && na->nc->aliases->size() > 1 && Config->GetModule("nickserv").Get<bool>("preservedisplay") && !source.HasPriv("nickserv/drop/display"))
		{
			source.Reply(_("You may not drop \002%s\002 as it is the display nick for the account."), na->nick.c_str());
			return;
		}

		auto *code = dropcode.Get(na);
		if (params.size() < 2 || ((!code || !code->equals_ci(params[1])) && (!source.HasPriv("nickserv/drop/override") || params[1] != "OVERRIDE")))
		{
			if (!code)
			{
				code = na->Extend<Anope::string>("nickname-dropcode");
				*code = Anope::Random(Config->GetBlock("options").Get<size_t>("codelength", "15"));
			}

			source.Reply(CONFIRM_DROP, na->nick.c_str(), source.service->GetQueryCommand("nickserv/drop").c_str(),
				na->nick.c_str(), code->c_str());
			return;
		}

		FOREACH_MOD(OnNickDrop, (source, na));

		Log(!is_mine ? LOG_ADMIN : LOG_COMMAND, source, this) << "to drop nickname " << na->nick << " (group: " << na->nc->display << ") (email: " << (!na->nc->email.empty() ? na->nc->email : "none") << ")";
		delete na;

		source.Reply(_("Nickname \002%s\002 has been dropped."), nick.c_str());
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_(
			"Drops the given nick from the database. Once your nickname "
			"is dropped you may lose all of your access and channels that "
			"you may own. Any other user will be able to gain control of "
			"this nick."
		));

		source.Reply(" ");
		if (!source.HasPriv("nickserv/drop"))
			source.Reply(_("You may drop any nick within your group."));
		else
			source.Reply(_("As a Services Operator, you may drop any nick."));

		source.Reply(" ");
		if (source.HasPriv("nickserv/drop/override"))
		{
			source.Reply(_(
				"Additionally, Services Operators with the \037nickserv/drop/override\037 permission can "
				"replace \037code\037 with \002OVERRIDE\002 to drop without a confirmation code."
			));
		}
		return true;
	}
};

class NSDrop final
	: public Module
{
	CommandNSDrop commandnsdrop;

public:
	NSDrop(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR),
		commandnsdrop(this)
	{

	}
};

MODULE_INIT(NSDrop)