// Anope IRC Services <https://www.anope.org/>
//
// Copyright (C) 2003-2026 Anope Contributors
//
// Anope is free software. You can use, modify, and/or distribute it under the
// terms of version 2 of the GNU General Public License. See docs/LICENSE.txt
// for the complete terms of this license and docs/AUTHORS.txt for a list of
// contributors.
//
// Based on the original code of Epona by Lara
// Based on the original code of Services by Andy Church
//
// SPDX-License-Identifier: GPL-2.0-only

#include "module.h"

class CommandCSUp final
	: public Command
{
	static void SetModes(User *u, Channel *c)
	{
		if (!c->ci)
			return;

		/* whether or not we are giving modes */
		bool giving = true;
		/* whether or not we have given a mode */
		bool given = false;
		AccessGroup u_access = c->ci->AccessFor(u);

		for (auto *cm : ModeManager::GetStatusChannelModesByRank())
		{
			bool has_priv = u_access.HasPriv("AUTO" + cm->name) || u_access.HasPriv(cm->name);

			if (has_priv)
			{
				/* Always give op. If we have already given one mode, don't give more until it has a symbol */
				if (cm->name == "OP" || !given || (giving && cm->symbol))
				{
					c->SetMode(NULL, cm, u->GetUID(), false);
					/* Now if this contains a symbol don't give any more modes, to prevent setting +qaohv etc on users */
					giving = !cm->symbol;
					given = true;
				}
			}
		}
	}
public:
	CommandCSUp(Module *creator) : Command(creator, "chanserv/up", 0, 2)
	{
		this->SetDesc(_("Updates a selected nicks status on a channel"));
		this->SetSyntax(_("[\037channel\037 [\037nick\037]]"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) override
	{
		if (params.empty())
		{
			if (!source.GetUser())
				return;
			for (auto it = source.GetUser()->chans.begin(); it != source.GetUser()->chans.end(); ++it)
			{
				Channel *c = it->second->chan;
				SetModes(source.GetUser(), c);
			}
			Log(LOG_COMMAND, source, this, NULL) << "on all channels to update their status modes";
		}
		else
		{
			const Anope::string &channel = params[0];
			const Anope::string &nick = params.size() > 1 ? params[1] : source.GetNick();

			Channel *c = Channel::Find(channel);

			if (c == NULL)
			{
				source.Reply(CHAN_X_NOT_IN_USE, channel.c_str());
				return;
			}
			else if (!c->ci)
			{
				source.Reply(CHAN_X_NOT_REGISTERED, channel.c_str());
				return;
			}

			User *u = User::Find(nick, true);
			User *srcu = source.GetUser();
			bool override = false;

			if (u == NULL)
			{
				source.Reply(NICK_X_NOT_IN_USE, nick.c_str());
				return;
			}
			else if (srcu && !srcu->FindChannel(c))
			{
				source.Reply(_("You must be in \002%s\002 to use this command."), c->name.c_str());
				return;
			}
			else if (!u->FindChannel(c))
			{
				source.Reply(NICK_X_NOT_ON_CHAN, nick.c_str(), channel.c_str());
				return;
			}
			else if (source.GetUser() && u != source.GetUser() && c->ci->HasExt("PEACE"))
			{
				if (c->ci->AccessFor(u) >= c->ci->AccessFor(source.GetUser()))
				{
					if (source.HasPriv("chanserv/administration"))
						override = true;
					else
					{
						source.Reply(ACCESS_DENIED);
						return;
					}
				}
			}

			Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, c->ci) << "to update the status modes of " << u->nick;
			SetModes(u, c);
		}

	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_(
			"Updates a selected nicks status modes on a channel. If \037nick\037 is "
			"omitted then your status is updated. If \037channel\037 is omitted then "
			"your channel status is updated on every channel you are in."
		));
		return true;
	}
};

class CommandCSDown final
	: public Command
{
	static void RemoveAll(User *u, Channel *c)
	{
		auto *memb = c->FindUser(u);
		if (memb != NULL)
		{
			auto modes = memb->status.Modes();
			for (auto *mode : modes)
				c->RemoveMode(NULL, mode, u->GetUID());
		}
	}

public:
	CommandCSDown(Module *creator) : Command(creator, "chanserv/down", 0, 2)
	{
		this->SetDesc(_("Removes a selected nicks status from a channel"));
		this->SetSyntax(_("[\037channel\037 [\037nick\037]]"));
	}

	void Execute(CommandSource &source, const std::vector<Anope::string> &params) override
	{
		if (params.empty())
		{
			if (!source.GetUser())
				return;
			for (auto it = source.GetUser()->chans.begin(); it != source.GetUser()->chans.end(); ++it)
			{
				Channel *c = it->second->chan;
				RemoveAll(source.GetUser(), c);
			}
			Log(LOG_COMMAND, source, this, NULL) << "on all channels to remove their status modes";
		}
		else
		{
			const Anope::string &channel = params[0];
			const Anope::string &nick = params.size() > 1 ? params[1] : source.GetNick();

			Channel *c = Channel::Find(channel);

			if (c == NULL)
			{
				source.Reply(CHAN_X_NOT_IN_USE, channel.c_str());
				return;
			}
			else if (!c->ci)
			{
				source.Reply(CHAN_X_NOT_REGISTERED, channel.c_str());
				return;
			}

			User *u = User::Find(nick, true);
			User *srcu = source.GetUser();
			bool override = false;

			if (u == NULL)
			{
				source.Reply(NICK_X_NOT_IN_USE, nick.c_str());
				return;
			}
			else if (srcu && !srcu->FindChannel(c))
			{
				source.Reply(_("You must be in \002%s\002 to use this command."), c->name.c_str());
				return;
			}
			else if (!u->FindChannel(c))
			{
				source.Reply(NICK_X_NOT_ON_CHAN, nick.c_str(), channel.c_str());
				return;
			}
			else if (source.GetUser() && u != source.GetUser() && c->ci->HasExt("PEACE"))
			{
				if (c->ci->AccessFor(u) >= c->ci->AccessFor(source.GetUser()))
				{
					if (source.HasPriv("chanserv/administration"))
						override = true;
					else
					{
						source.Reply(ACCESS_DENIED);
						return;
					}
				}
			}

			Log(override ? LOG_OVERRIDE : LOG_COMMAND, source, this, c->ci) << "to remove the status modes from " << u->nick;
			RemoveAll(u, c);
		}
	}

	bool OnHelp(CommandSource &source, const Anope::string &subcommand) override
	{
		this->SendSyntax(source);
		source.Reply(" ");
		source.Reply(_(
			"Removes a selected nicks status modes on a channel. If \037nick\037 is "
			"omitted then your status is removed. If \037channel\037 is omitted then "
			"your channel status is removed on every channel you are in."
		));
		return true;
	}
};

class CSUpDown final
	: public Module
{
	CommandCSUp commandcsup;
	CommandCSDown commandcsdown;

public:
	CSUpDown(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR),
		commandcsup(this), commandcsdown(this)
	{

	}
};

MODULE_INIT(CSUpDown)