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/* $Id$ */

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/** @file ai_vehicle.hpp Everything to query and build vehicles */

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#ifndef AI_VEHICLE_HPP

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#define AI_VEHICLE_HPP

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#include "ai_object.hpp"

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/**

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 * Class that handles all vehicle related functions.

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 */

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class AIVehicle : public AIObject {

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public:

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	/**

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	 * The name of the class, needed by several sub-processes.

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	 */

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	static const char *GetClassName() { return "AIVehicle"; }

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	/**

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	 * Checks whether the given engine type is valid and buildable by you.

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	 * @param engine_id the engine to check.

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	 * @return true if and only if the engine type is valid.

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	 */

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	static bool IsValidEngine(EngineID engine_id);

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	/**

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	 * Checks whether the given vehicle is valid and owned by you.

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	 * @param vehicle_id the vehicle to check.

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	 * @return true if and only if the vehicle is valid.

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	 */

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	static bool IsValidVehicle(VehicleID vehicle_id);

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	/**

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	 * Find the best road vehicle for this job, given a minimum reliability.

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	 * @param cargo           the cargo the vehicle has to transport.

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	 * @param min_reliability the minimum reliability of the vehicle,

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	 *   between 0 and 100.

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	 * @pre the tile at depot has a depot that can build the engine and

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	 *   is owned by you.

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	 * @pre AICargo::IsValidCargo(cargo).

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	 * @pre min_reliability is between 0 and 100.

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	 * @return the engine with the best characteristics, or an invalid engine

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	 *   when no engine was found given the cargo and reliability. Check the

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	 *   return value using IsValidEngine.

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	 */

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	EngineID FindBestRoadVehicle(CargoID cargo, uint8 min_reliability);

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	/**

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	 * Builds a vehicle with the given engine at the given depot.

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	 * @param depot     the depot where the vehicle will be build.

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	 * @param engine_id the engine to use for this vehicle.

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	 * @pre the tile at depot has a depot that can build the engine and

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	 *   is owned by you.

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	 * @pre IsValidEngine(engine_id).

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	 * @return the VehicleID of the new vehicle, or an invalid VehicleID when

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	 *   it failed. Check the return value using IsValidVehicle. In test-mode

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	 *   0 is returned if it was successful; any other value indicates failure.

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	 */

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	VehicleID BuildVehicle(TileIndex depot, EngineID engine_id);

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	/**

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	 * Clones a vehicle at the given depot, copying or cloning it's orders.

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	 * @param depot        the depot where the vehicle will be build.

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	 * @param vehicle_id   the vehicle to use as example for the new vehicle.

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	 * @param share_orders should the orders be copied or shared?

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	 * @pre the tile at depot has a depot.

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	 * @pre IsValidVehicle(vehicle_id).

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	 * @return the VehicleID of the new vehicle, or an invalid VehicleID when

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	 *   it failed. Check the return value using IsValidVehicle. In test-mode

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	 *   0 is returned if it was successful; any other value indicates failure.

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	 */

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	VehicleID CloneVehicle(TileIndex depot, VehicleID vehicle_id, bool share_orders);

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	/**

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	 * Refits a vehicle to the given cargo type

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	 * @param vehicle_id the vehicle to refit

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	 * @param cargo      the cargo to refit to

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	 * @pre IsValidVehicle(vehicle_id).

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	 * @pre AICargo::IsValidCargo(cargo)

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	 * @pre you must own the vehicle

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	 * @pre the vehicle must be stopped in the depot

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	 * @return true if and only if the refit succeeded.

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	 */

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	bool RefitVehicle(VehicleID vehicle_id, CargoID cargo);

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	/**

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	 * Sells the given vehicle.

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	 * @param vehicle_id the vehicle to sell.

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	 * @pre IsValidVehicle(vehicle_id).

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	 * @pre you must own the vehicle

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	 * @pre the vehicle must be stopped in the depot

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	 * @return true if and only if the vehicle has been sold.

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	 */

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	bool SellVehicle(VehicleID vehicle_id);

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	/**

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	 * Sends the given vehicle to a depot.

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	 * @param vehicle_id the vehicle to send to a depot.

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	 * @pre IsValidVehicle(vehicle_id).

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	 * @return true if and only if the vehicle has been sent to a depot.

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	 */

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	bool SendVehicleToDepot(VehicleID vehicle_id);

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	/**

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	 * Starts or stops the given vehicle depending on the current state.

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	 * @param vehicle_id the vehicle to start/stop.

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	 * @pre IsValidVehicle(vehicle_id).

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	 * @return true if and only if the vehicle has been started or stopped.

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	 */

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	bool StartStopVehicle(VehicleID vehicle_id);

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	/**

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	 * Skips the current order of the given vehicle.

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	 * @param vehicle_id the vehicle to skip the order for.

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	 * @pre IsValidVehicle(vehicle_id).

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	 * @return true if and only if the order has been skipped.

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	 */

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	bool SkipVehicleOrder(VehicleID vehicle_id);

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};

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#ifdef DEFINE_SQUIRREL_CLASS

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namespace SQConvert {

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	/* Allow AIVehicle to be used as Squirrel parameter */

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	template <> AIVehicle *GetParam(ForceType<AIVehicle *>, HSQUIRRELVM vm, int index) { SQUserPointer instance; sq_getinstanceup(vm, index, &instance, 0); return (AIVehicle *)instance; }

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}; // namespace SQConvert

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void SQAIVehicleRegister(Squirrel *engine) {

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	DefSQClass <AIVehicle> SQAIVehicle("AIVehicle");

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	SQAIVehicle.PreRegister(engine);

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	SQAIVehicle.AddConstructor(engine);

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	SQAIVehicle.DefSQStaticMethod(engine, &AIVehicle::GetClassName,   "GetClassName",   1, "x");

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	SQAIVehicle.DefSQStaticMethod(engine, &AIVehicle::IsValidEngine,  "IsValidEngine",  2, "xi");

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	SQAIVehicle.DefSQStaticMethod(engine, &AIVehicle::IsValidVehicle, "IsValidVehicle", 2, "xi");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::FindBestRoadVehicle, "FindBestRoadVehicle", 3, "xii");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::BuildVehicle,        "BuildVehicle",        3, "xii");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::CloneVehicle,        "CloneVehicle",        4, "xiib");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::RefitVehicle,        "RefitVehicle",        3, "xii");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::SellVehicle,         "SellVehicle",         2, "xi");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::SendVehicleToDepot,  "SendVehicleToDepot",  2, "xi");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::StartStopVehicle,    "StartStopVehicle",    2, "xi");

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	SQAIVehicle.DefSQMethod(engine, &AIVehicle::SkipVehicleOrder,    "SkipVehicleOrder",    2, "xi");

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	SQAIVehicle.PostRegister(engine);

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}

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#endif /* DEFINE_SQUIRREL_CLASS */

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#endif /* AI_VEHICLE_HPP */