/* $Id$ */

/** @file ai_station.cpp handles the functions of the AIStation class */

#include "ai_station.hpp"
#include "ai_cargo.hpp"
#include "../../station.h"
#include "../../station_map.h"

/* static */ bool AIStation::IsValidStation(StationID station_id)
{
	return ::IsValidStationID(station_id) && ::GetStation(station_id)->owner == _current_player;
}

/* static */ StationID AIStation::GetStationID(TileIndex tile)
{
	if (!::IsTileType(tile, MP_STATION)) return INVALID_STATION;
	return ::GetStationIndex(tile);
}

/* static */ TileIndex AIStation::GetLocation(StationID station_id)
{
	if (!AIStation::IsValidStation(station_id)) return INVALID_TILE;

	return ::GetStation(station_id)->xy;
}

/* static */ int32 AIStation::GetCargoWaiting(StationID station_id, CargoID cargo_id)
{
	if (!AIStation::IsValidStation(station_id)) return -1;
	if (!AICargo::IsValidCargo(cargo_id)) return -1;

	return ::GetStation(station_id)->goods[cargo_id].cargo.Count();
}

/* static */ int32 AIStation::GetCargoRating(StationID station_id, CargoID cargo_id)
{
	if (!AIStation::IsValidStation(station_id)) return -1;
	if (!AICargo::IsValidCargo(cargo_id)) return -1;

	return ::GetStation(station_id)->goods[cargo_id].rating * 101 >> 8;
}