/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file company_func.h Functions related to companies. */

#ifndef COMPANY_FUNC_H
#define COMPANY_FUNC_H

#include "command_type.h"
#include "company_type.h"
#include "gfx_type.h"
#include "vehicle_type.h"

bool MayCompanyTakeOver(CompanyID cbig, CompanyID small);
void ChangeOwnershipOfCompanyItems(Owner old_owner, Owner new_owner);
void GetNameOfOwner(Owner owner, TileIndex tile);
void SetLocalCompany(CompanyID new_company);
void ShowBuyCompanyDialog(CompanyID company, bool hostile_takeover);
void CompanyAdminUpdate(const Company *company);
void CompanyAdminBankrupt(CompanyID company_id);
void UpdateLandscapingLimits();

bool CheckCompanyHasMoney(CommandCost &cost);
void SubtractMoneyFromCompany(const CommandCost& cost);
void SubtractMoneyFromCompanyFract(CompanyID company, const CommandCost& cost);
CommandCost CheckOwnership(Owner owner, TileIndex tile = 0);
CommandCost CheckTileOwnership(TileIndex tile);

extern CompanyID _local_company;
extern CompanyID _current_company;
extern CompanyID _loaded_local_company;

extern Colours _company_colours[MAX_COMPANIES];
extern CompanyManagerFace _company_manager_face;

/**
 * Is the current company the local company?
 * @return \c true of the current company is the local company, \c false otherwise.
 */
static inline bool IsLocalCompany()
{
	return _local_company == _current_company;
}

/**
 * Is the user representing \a company?
 * @param company Company where interaction is needed with.
 * @return Gives \c true if the user can answer questions interactively as representative of \a company, else \c false
 */
static inline bool IsInteractiveCompany(CompanyID company)
{
	return company == _local_company;
}

int CompanyServiceInterval(const Company *c, VehicleType type);

CompanyID GetDefaultLocalCompany();

/**
 * List of flags for DoStartupNewCompany.
 */
enum DoStartupNewCompanyFlag {
	DSNC_NONE                = 0x000, ///< no flag is set
	DSNC_AI                  = 0x001, ///< start an AI company
	DSNC_DURING_LOAD         = 0x002, ///< the save is currently being loaded, do not perform operations which require that loading has completed
};
DECLARE_ENUM_AS_BIT_SET(DoStartupNewCompanyFlag)

Company *DoStartupNewCompany(DoStartupNewCompanyFlag flags, CompanyID company = INVALID_COMPANY);

#endif /* COMPANY_FUNC_H */