/* BotServ core functions
 *
 * (C) 2003-2020 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 CommandBSAssign : public Command
{
 public:
	CommandBSAssign(Module *creator) : Command(creator, "botserv/assign", 2, 2)
	{
		this->SetDesc(_("Assigns a bot to a channel"));
		this->SetSyntax(_("\037channel\037 \037nick\037"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		const Anope::string &chan = params[0];
		const Anope::string &nick = params[1];

		if (Anope::ReadOnly)
		{
			source.Reply(_("Sorry, bot assignment is temporarily disabled."));
			return;
		}

		ChannelInfo *ci = ChannelInfo::Find(params[0]);
		if (ci == NULL)
		{
			source.Reply(CHAN_X_NOT_REGISTERED, params[0].c_str());
			return;
		}

		BotInfo *bi = BotInfo::Find(nick, true);
		if (!bi)
		{
			source.Reply(BOT_DOES_NOT_EXIST, nick.c_str());
			return;
		}

		AccessGroup access = source.AccessFor(ci);
		if (ci->HasExt("BS_NOBOT") || (!access.HasPriv("ASSIGN") && !source.HasPriv("botserv/administration")))
		{
			source.Reply(ACCESS_DENIED);
			return;
		}

		if (bi->oper_only && !source.HasPriv("botserv/administration"))
		{
			source.Reply(ACCESS_DENIED);
			return;
		}

		if (ci->bi == bi)
		{
			source.Reply(_("Bot \002%s\002 is already assigned to channel \002%s\002."), ci->bi->nick.c_str(), chan.c_str());
			return;
		}

		bool override = !access.HasPriv("ASSIGN");
		Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "for " << bi->nick;

		bi->Assign(source.GetUser(), ci);
		source.Reply(_("Bot \002%s\002 has been assigned to %s."), bi->nick.c_str(), ci->name.c_str());
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_("Assigns the specified bot to a channel. You\n"
				"can then configure the bot for the channel so it fits\n"
				"your needs."));
		return true;
	}
};

class CommandBSUnassign : public Command
{
 public:
	CommandBSUnassign(Module *creator) : Command(creator, "botserv/unassign", 1, 1)
	{
		this->SetDesc(_("Unassigns a bot from a channel"));
		this->SetSyntax(_("\037channel\037"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		if (Anope::ReadOnly)
		{
			source.Reply(_("Sorry, bot assignment is temporarily disabled."));
			return;
		}

		ChannelInfo *ci = ChannelInfo::Find(params[0]);
		if (ci == NULL)
		{
			source.Reply(CHAN_X_NOT_REGISTERED, params[0].c_str());
			return;
		}

		AccessGroup access = source.AccessFor(ci);
		if (!source.HasPriv("botserv/administration") && !access.HasPriv("ASSIGN"))
		{
			source.Reply(ACCESS_DENIED);
			return;
		}

		if (!ci->bi)
		{
			source.Reply(BOT_NOT_ASSIGNED);
			return;
		}

		if (ci->HasExt("PERSIST") && !ModeManager::FindChannelModeByName("PERM"))
		{
			source.Reply(_("You cannot unassign bots while persist is set on the channel."));
			return;
		}

		bool override = !access.HasPriv("ASSIGN");
		Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, ci) << "for " << ci->bi->nick;

		ci->bi->UnAssign(source.GetUser(), ci);
		source.Reply(_("There is no bot assigned to %s anymore."), ci->name.c_str());
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) anope_override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_("Unassigns a bot from a channel. When you use this command,\n"
				"the bot won't join the channel anymore. However, bot\n"
				"configuration for the channel is kept, so you will always\n"
				"be able to reassign a bot later without having to reconfigure\n"
				"it entirely."));
		return true;
	}
};

class CommandBSSetNoBot : public Command
{
 public:
	CommandBSSetNoBot(Module *creator, const Anope::string &sname = "botserv/set/nobot") : Command(creator, sname, 2, 2)
	{
		this->SetDesc(_("Prevent a bot from being assigned to a channel"));
		this->SetSyntax(_("\037channel\037 {\037ON|OFF\037}"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) anope_override
	{
		ChannelInfo *ci = ChannelInfo::Find(params[0]);
		const Anope::string &value = params[1];

		if (Anope::ReadOnly)
		{
			source.Reply(_("Sorry, bot modification is temporarily disabled."));
			return;
		}

		if (ci == NULL)
		{
			source.Reply(CHAN_X_NOT_REGISTERED, params[0].c_str());
			return;
		}

		if (value.equals_ci("ON"))
		{
			Log(LOG_ADMIN, source, this, ci) << "to enable nobot";

			ci->Extend<bool>("BS_NOBOT");
			if (ci->bi)
				ci->bi->UnAssign(source.GetUser(), ci);
			source.Reply(_("No-bot mode is now \002on\002 on channel %s."), ci->name.c_str());
		}
		else if (value.equals_ci("OFF"))
		{
			Log(LOG_ADMIN, source, this, ci) << "to disable nobot";

			ci->Shrink<bool>("BS_NOBOT");
			source.Reply(_("No-bot mode is now \002off\002 on channel %s."), ci->name.c_str());
		}
		else
			this->OnSyntaxError(source, source.command);
	}

	bool OnHelp(CommandSource &source, const Anope::string &) anope_override
	{
		this->SendSyntax(source);
		source.Reply(_(" \n"
				"This option makes a channel unassignable. If a bot\n"
				"is already assigned to the channel, it is unassigned\n"
				"automatically when you enable it."));
		return true;
	}
};

class BSAssign : public Module
{
	ExtensibleItem<bool> nobot;

	CommandBSAssign commandbsassign;
	CommandBSUnassign commandbsunassign;
	CommandBSSetNoBot commandbssetnobot;

 public:
	BSAssign(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR),
		nobot(this, "BS_NOBOT"),
		commandbsassign(this), commandbsunassign(this), commandbssetnobot(this)
	{
	}

	void OnInvite(User *source, Channel *c, User *targ) anope_override
	{
		BotInfo *bi;
		if (Anope::ReadOnly || !c->ci || targ->server != Me || !(bi = dynamic_cast<BotInfo *>(targ)))
			return;

		AccessGroup access = c->ci->AccessFor(source);
		if (nobot.HasExt(c->ci) || (!access.HasPriv("ASSIGN") && !source->HasPriv("botserv/administration")))
		{
			targ->SendMessage(bi, ACCESS_DENIED);
			return;
		}

		if (bi->oper_only && !source->HasPriv("botserv/administration"))
		{
			targ->SendMessage(bi, ACCESS_DENIED);
			return;
		}

		if (c->ci->bi == bi)
		{
			targ->SendMessage(bi, _("Bot \002%s\002 is already assigned to channel \002%s\002."), c->ci->bi->nick.c_str(), c->name.c_str());
			return;
		}

		bi->Assign(source, c->ci);
		targ->SendMessage(bi, _("Bot \002%s\002 has been assigned to %s."), bi->nick.c_str(), c->name.c_str());
	}

	void OnBotInfo(CommandSource &source, BotInfo *bi, ChannelInfo *ci, InfoFormatter &info) anope_override
	{
		if (nobot.HasExt(ci))
			info.AddOption(_("No bot"));
	}
};

MODULE_INIT(BSAssign)
