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/* $Id$ */

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/** @file command_type.h Types related to commands. */

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#ifndef COMMAND_TYPE_H

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#define COMMAND_TYPE_H

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#include "economy_type.h"

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#include "strings_type.h"

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#include "tile_type.h"

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/**

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 * Common return value for all commands. Wraps the cost and

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 * a possible error message/state together.

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 */

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class CommandCost {

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	ExpensesType expense_type; ///< the type of expence as shown on the finances view

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	Money cost;       ///< The cost of this action

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	StringID message; ///< Warning message for when success is unset

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	bool success;     ///< Whether the comment went fine up to this moment

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public:

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	/**

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	 * Creates a command cost return with no cost and no error

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	 */

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	CommandCost() : expense_type(INVALID_EXPENSES), cost(0), message(INVALID_STRING_ID), success(true) {}

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	/**

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	 * Creates a command return value the is failed with the given message

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	 */

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	CommandCost(StringID msg) : expense_type(INVALID_EXPENSES), cost(0), message(msg), success(false) {}

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	/**

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	 * Creates a command cost with given expense type and start cost of 0

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	 * @param ex_t the expense type

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	 */

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	CommandCost(ExpensesType ex_t) : expense_type(ex_t), cost(0), message(INVALID_STRING_ID), success(true) {}

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	/**

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	 * Creates a command return value with the given start cost and expense type

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	 * @param ex_t the expense type

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	 * @param cst the initial cost of this command

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	 */

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	CommandCost(ExpensesType ex_t, Money cst) : expense_type(ex_t), cost(cst), message(INVALID_STRING_ID), success(true) {}

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	/**

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	 * Adds the cost of the given command return value to this cost.

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	 * Also takes a possible error message when it is set.

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	 * @param ret the command to add the cost of.

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	 * @return this class.

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	 */

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	CommandCost AddCost(CommandCost ret)

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	{

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		this->AddCost(ret.cost);

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		if (this->success && !ret.success) {

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			this->message = ret.message;

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			this->success = false;

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		}

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		return *this;

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	}

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	/**

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	 * Adds the given cost to the cost of the command.

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	 * @param cost the cost to add

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	 * @return this class.

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	 */

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	CommandCost AddCost(Money cost)

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	{

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		this->cost += cost;

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		return *this;

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	}

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	/**

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	 * Multiplies the cost of the command by the given factor.

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	 * @param cost factor to multiply the costs with

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	 * @return this class

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	 */

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	CommandCost MultiplyCost(int factor)

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	{

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		this->cost *= factor;

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		return *this;

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	}

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	/**

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	 * The costs as made up to this moment

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	 * @return the costs

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	 */

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	Money GetCost() const

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	{

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		return this->cost;

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	}

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	/**

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	 * The expense type of the cost

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	 * @return the expense type

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	 */

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	ExpensesType GetExpensesType() const

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	{

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		return this->expense_type;

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	}

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	/**

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	 * Sets the global error message *if* this class has one.

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	 */

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	void SetGlobalErrorMessage() const

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	{

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		extern StringID _error_message;

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		if (this->message != INVALID_STRING_ID) _error_message = this->message;

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	}

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	/**

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	 * Did this command succeed?

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	 * @return true if and only if it succeeded

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	 */

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	bool Succeeded() const

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	{

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		return this->success;

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	}

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	/**

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	 * Did this command fail?

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	 * @return true if and only if it failed

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	 */

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	bool Failed() const

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	{

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		return !this->success;

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	}

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};

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/**

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 * List of commands.

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 *

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 * This enum defines all possible commands which can be executed to the game

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 * engine. Observing the game like the query-tool or checking the profit of a

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 * vehicle don't result in a command which should be executed in the engine

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 * nor send to the server in a network game.

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 *

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 * @see _command_proc_table

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 */

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enum {

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	CMD_BUILD_RAILROAD_TRACK,         ///< build a rail track

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	CMD_REMOVE_RAILROAD_TRACK,        ///< remove a rail track

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	CMD_BUILD_SINGLE_RAIL,            ///< build a single rail track

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	CMD_REMOVE_SINGLE_RAIL,           ///< remove a single rail track

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	CMD_LANDSCAPE_CLEAR,              ///< demolish a tile

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	CMD_BUILD_BRIDGE,                 ///< build a bridge

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	CMD_BUILD_RAILROAD_STATION,       ///< build a railroad station

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	CMD_BUILD_TRAIN_DEPOT,            ///< build a train depot

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	CMD_BUILD_SIGNALS,                ///< build a signal

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	CMD_REMOVE_SIGNALS,               ///< remove a signal

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	CMD_TERRAFORM_LAND,               ///< terraform a tile

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	CMD_PURCHASE_LAND_AREA,           ///< purchase a tile

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	CMD_SELL_LAND_AREA,               ///< sell a bought tile before

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	CMD_BUILD_TUNNEL,                 ///< build a tunnel

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	CMD_REMOVE_FROM_RAILROAD_STATION, ///< remove a tile station

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	CMD_CONVERT_RAIL,                 ///< convert a rail type

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	CMD_BUILD_TRAIN_WAYPOINT,         ///< build a waypoint

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	CMD_RENAME_WAYPOINT,              ///< rename a waypoint

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	CMD_REMOVE_TRAIN_WAYPOINT,        ///< remove a waypoint

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	CMD_BUILD_ROAD_STOP,              ///< build a road stop

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	CMD_REMOVE_ROAD_STOP,             ///< remove a road stop

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	CMD_BUILD_LONG_ROAD,              ///< build a complete road (not a "half" one)

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	CMD_REMOVE_LONG_ROAD,             ///< remove a complete road (not a "half" one)

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	CMD_BUILD_ROAD,                   ///< build a "half" road

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	CMD_REMOVE_ROAD,                  ///< remove a "half" road

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	CMD_BUILD_ROAD_DEPOT,             ///< build a road depot

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	CMD_BUILD_AIRPORT,                ///< build an airport

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	CMD_BUILD_DOCK,                   ///< build a dock

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	CMD_BUILD_SHIP_DEPOT,             ///< build a ship depot

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	CMD_BUILD_BUOY,                   ///< build a buoy

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	CMD_PLANT_TREE,                   ///< plant a tree

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	CMD_BUILD_RAIL_VEHICLE,           ///< build a rail vehicle

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	CMD_MOVE_RAIL_VEHICLE,            ///< move a rail vehicle (in the depot)

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	CMD_START_STOP_TRAIN,             ///< start or stop a train

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	CMD_SELL_RAIL_WAGON,              ///< sell a rail wagon

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	CMD_SEND_TRAIN_TO_DEPOT,          ///< send a train to a depot

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	CMD_FORCE_TRAIN_PROCEED,          ///< proceed a train to pass a red signal

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	CMD_REVERSE_TRAIN_DIRECTION,      ///< turn a train around

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	CMD_MODIFY_ORDER,                 ///< modify an order (like set full-load)

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	CMD_SKIP_TO_ORDER,                ///< skip an order to the next of specific one

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	CMD_DELETE_ORDER,                 ///< delete an order

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	CMD_INSERT_ORDER,                 ///< insert a new order

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	CMD_CHANGE_SERVICE_INT,           ///< change the server interval of a vehicle

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	CMD_BUILD_INDUSTRY,               ///< build a new industry

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	CMD_BUILD_COMPANY_HQ,             ///< build the company headquarter

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	CMD_SET_PLAYER_FACE,              ///< set the face of the player/company

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	CMD_SET_PLAYER_COLOR,             ///< set the color of the player/company

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	CMD_INCREASE_LOAN,                ///< increase the loan from the bank

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	CMD_DECREASE_LOAN,                ///< decrease the loan from the bank

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	CMD_WANT_ENGINE_PREVIEW,          ///< confirm the preview of an engine

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	CMD_NAME_VEHICLE,                 ///< rename a whole vehicle

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	CMD_RENAME_ENGINE,                ///< rename a engine (in the engine list)

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	CMD_CHANGE_COMPANY_NAME,          ///< change the company name

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	CMD_CHANGE_PRESIDENT_NAME,        ///< change the president name

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	CMD_RENAME_STATION,               ///< rename a station

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	CMD_SELL_AIRCRAFT,                ///< sell an aircraft

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	CMD_START_STOP_AIRCRAFT,          ///< start/stop an aircraft

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	CMD_BUILD_AIRCRAFT,               ///< build an aircraft

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	CMD_SEND_AIRCRAFT_TO_HANGAR,      ///< send an aircraft to a hanger

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	CMD_REFIT_AIRCRAFT,               ///< refit the cargo space of an aircraft

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	CMD_PLACE_SIGN,                   ///< place a sign

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	CMD_RENAME_SIGN,                  ///< rename a sign

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	CMD_BUILD_ROAD_VEH,               ///< build a road vehicle

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	CMD_START_STOP_ROADVEH,           ///< start/stop a road vehicle

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	CMD_SELL_ROAD_VEH,                ///< sell a road vehicle

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	CMD_SEND_ROADVEH_TO_DEPOT,        ///< send a road vehicle to the depot

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	CMD_TURN_ROADVEH,                 ///< turn a road vehicle around

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	CMD_REFIT_ROAD_VEH,               ///< refit the cargo space of a road vehicle

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	CMD_PAUSE,                        ///< pause the game

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	CMD_BUY_SHARE_IN_COMPANY,         ///< buy a share from a company

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	CMD_SELL_SHARE_IN_COMPANY,        ///< sell a share from a company

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	CMD_BUY_COMPANY,                  ///< buy a company which is bankrupt

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	CMD_BUILD_TOWN,                   ///< build a town

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	CMD_RENAME_TOWN,                  ///< rename a town

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	CMD_DO_TOWN_ACTION,               ///< do a action from the town detail window (like advertises or bribe)

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	CMD_SET_ROAD_DRIVE_SIDE,          ///< set the side where the road vehicles drive

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	CMD_CHANGE_DIFFICULTY_LEVEL,      ///< change the difficult of a game (each setting for it own)

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	CMD_START_STOP_SHIP,              ///< start/stop a ship

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	CMD_SELL_SHIP,                    ///< sell a ship

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	CMD_BUILD_SHIP,                   ///< build a new ship

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	CMD_SEND_SHIP_TO_DEPOT,           ///< send a ship to a depot

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	CMD_REFIT_SHIP,                   ///< refit the cargo space of a ship

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	CMD_ORDER_REFIT,                  ///< change the refit informaction of an order (for "goto depot" )

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	CMD_CLONE_ORDER,                  ///< clone (and share) an order

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	CMD_CLEAR_AREA,                   ///< clear an area

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	CMD_MONEY_CHEAT,                  ///< do the money cheat

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	CMD_BUILD_CANAL,                  ///< build a canal

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	CMD_PLAYER_CTRL,                  ///< used in multiplayer to create a new player etc.

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	CMD_LEVEL_LAND,                   ///< level land

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	CMD_REFIT_RAIL_VEHICLE,           ///< refit the cargo space of a train

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	CMD_RESTORE_ORDER_INDEX,          ///< restore vehicle order-index and service interval

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	CMD_BUILD_LOCK,                   ///< build a lock

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	CMD_BUILD_SIGNAL_TRACK,           ///< add signals along a track (by dragging)

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	CMD_REMOVE_SIGNAL_TRACK,          ///< remove signals along a track (by dragging)

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	CMD_GIVE_MONEY,                   ///< give money to an other player

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	CMD_CHANGE_PATCH_SETTING,         ///< change a patch setting

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	CMD_SET_AUTOREPLACE,              ///< set an autoreplace entry

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	CMD_CLONE_VEHICLE,                ///< clone a vehicle

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	CMD_MASS_START_STOP,              ///< start/stop all vehicles (in a depot)

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	CMD_DEPOT_SELL_ALL_VEHICLES,      ///< sell all vehicles which are in a given depot

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	CMD_DEPOT_MASS_AUTOREPLACE,       ///< force the autoreplace to take action in a given depot

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	CMD_CREATE_GROUP,                 ///< create a new group

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	CMD_DELETE_GROUP,                 ///< delete a group

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	CMD_RENAME_GROUP,                 ///< rename a group

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	CMD_ADD_VEHICLE_GROUP,            ///< add a vehicle to a group

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	CMD_ADD_SHARED_VEHICLE_GROUP,     ///< add all other shared vehicles to a group which are missing

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	CMD_REMOVE_ALL_VEHICLES_GROUP,    ///< remove all vehicles from a group

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	CMD_SET_GROUP_REPLACE_PROTECTION, ///< set the autoreplace-protection for a group

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	CMD_MOVE_ORDER,                   ///< move an order

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	CMD_CHANGE_TIMETABLE,             ///< change the timetable for a vehicle

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	CMD_SET_VEHICLE_ON_TIME,          ///< set the vehicle on time feature (timetable)

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	CMD_AUTOFILL_TIMETABLE,           ///< autofill the timetable

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};

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/**

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 * List of flags for a command.

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 *

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 * This enums defines some flags which can be used for the commands.

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 */

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enum {

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	DC_EXEC            = 0x01, ///< execute the given command

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	DC_AUTO            = 0x02, ///< don't allow building on structures

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	DC_QUERY_COST      = 0x04, ///< query cost only,  don't build.

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	DC_NO_WATER        = 0x08, ///< don't allow building on water

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	DC_NO_RAIL_OVERLAP = 0x10, ///< don't allow overlap of rails (used in buildrail)

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	DC_AI_BUILDING     = 0x20, ///< special building rules for AI

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	DC_NO_TOWN_RATING  = 0x40, ///< town rating does not disallow you from building

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	DC_BANKRUPT        = 0x80, ///< company bankrupts, skip money check, skip vehicle on tile check in some cases

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};

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/**

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 * Used to combine a StringID with the command.

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 *

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 * This macro can be used to add a StringID (the error message to show) on a command-id

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 * (CMD_xxx). Use the binary or-operator "|" to combine the command with the result from

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 * this macro.

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 *

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 * @param x The StringID to combine with a command-id

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 */

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#define CMD_MSG(x) ((x) << 16)

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/**

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 * Defines some flags.

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 *

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 * This enumeration defines some flags which are binary-or'ed on a command.

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 */

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enum {

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	CMD_NO_WATER              = 0x0400, ///< dont build on water

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	CMD_NETWORK_COMMAND       = 0x0800, ///< execute the command without sending it on the network

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	CMD_NO_TEST_IF_IN_NETWORK = 0x1000, ///< When enabled, the command will bypass the no-DC_EXEC round if in network

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	CMD_SHOW_NO_ERROR         = 0x2000, ///< do not show the error message

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};

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/**

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 * Command flags for the command table _command_proc_table.

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 *

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 * This enumeration defines flags for the _command_proc_table.

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 */

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enum {

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	CMD_SERVER  = 0x1, ///< the command can only be initiated by the server

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	CMD_OFFLINE = 0x2, ///< the command cannot be executed in a multiplayer game; single-player only

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	CMD_AUTO    = 0x4, ///< set the DC_AUTO flag on this command

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};

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/**

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 * Defines the callback type for all command handler functions.

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 *

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 * This type defines the function header for all functions which handles a CMD_* command.

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 * A command handler use the parameters to act according to the meaning of the command.

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 * The tile parameter defines the tile to perform an action on.

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 * The flag parameter is filled with flags from the DC_* enumeration. The parameters

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 * p1 and p2 are filled with parameters for the command like "which road type", "which

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 * order" or "direction". Each function should mentioned in there doxygen comments

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 * the usage of these parameters.

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 *

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 * @param tile The tile to apply a command on

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 * @param flags Flags for the command, from the DC_* enumeration

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 * @param p1 Additional data for the command

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 * @param p2 Additional data for the command

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 * @return The CommandCost of the command, which can be succeeded or failed.

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 */

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typedef CommandCost CommandProc(TileIndex tile, uint32 flags, uint32 p1, uint32 p2);

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/**

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 * Define a command with the flags which belongs to it.

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 *

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 * This struct connect a command handler function with the flags created with

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 * the #CMD_AUTO, #CMD_OFFLINE and #CMD_SERVER values.

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 */

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struct Command {

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	CommandProc *proc;

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	byte flags;

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};

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/**

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 * Define a callback function for the client, after the command is finished.

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 *

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 * Functions of this type are called after the command is finished. The parameters

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 * are from the #CommandProc callback type. The boolean parameter indicates if the

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 * command succeeded or failed.

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 *

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 * @param success If the command succeeded or not.

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 * @param tile The tile of the command action

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 * @param p1 Additional data of the command

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 * @param p1 Additional data of the command

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 * @see CommandProc

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 */

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typedef void CommandCallback(bool success, TileIndex tile, uint32 p1, uint32 p2);

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#endif /* COMMAND_TYPE_H */