/* $Id$ */

#ifndef VARIABLES_H
#define VARIABLES_H

// ********* START OF SAVE REGION
#if !defined(MAX_PATH)
# define MAX_PATH 260
#endif

// Prices and also the fractional part.
VARDEF Prices _price;
VARDEF uint16 _price_frac[NUM_PRICES];

VARDEF uint32 _cargo_payment_rates[NUM_CARGO];
VARDEF uint16 _cargo_payment_rates_frac[NUM_CARGO];

typedef struct {
	GameDifficulty diff;
	byte diff_level;
	byte currency;
	byte units;
	byte town_name;
	byte landscape;
	byte snow_line;
	byte autosave;
	byte road_side;
} GameOptions;

/* These are the options for the current game
 * either ingame, or loaded. Also used for networking games */
VARDEF GameOptions _opt;

/* These are the default options for a new game */
VARDEF GameOptions _opt_newgame;

// Pointer to one of the two _opt OR _opt_newgame structs
VARDEF GameOptions *_opt_ptr;

// Current date
VARDEF uint16 _date;
VARDEF uint16 _date_fract;

// Amount of game ticks
VARDEF uint16 _tick_counter;

// This one is not used anymore.
VARDEF VehicleID _vehicle_id_ctr_day;

// Skip aging of cargo?
VARDEF byte _age_cargo_skip_counter;

// Available aircraft types
VARDEF byte _avail_aircraft;

// Position in tile loop
VARDEF TileIndex _cur_tileloop_tile;

// Also save scrollpos_x, scrollpos_y and zoom
VARDEF uint16 _disaster_delay;

// Determines what station to operate on in the
//  tick handler.
VARDEF uint16 _station_tick_ctr;

VARDEF uint32 _random_seeds[2][2];

// Iterator through all towns in OnTick_Town
VARDEF uint32 _cur_town_ctr;
// Frequency iterator at the same place
VARDEF uint32 _cur_town_iter;

VARDEF uint _cur_player_tick_index;
VARDEF uint _next_competitor_start;

// Determines how often to run the tree loop
VARDEF byte _trees_tick_ctr;

// Keep track of current game position
VARDEF int _saved_scrollpos_x;
VARDEF int _saved_scrollpos_y;
VARDEF byte _saved_scrollpos_zoom;

// ********* END OF SAVE REGION

typedef struct Patches {
	bool modified_catchment;	//different-size catchment areas
	bool vehicle_speed;			// show vehicle speed
	bool build_on_slopes;		// allow building on slopes
	bool mammoth_trains;		// allow very long trains
	bool join_stations;			// allow joining of train stations
	bool full_load_any;			// new full load calculation, any cargo must be full
	bool improved_load;			// improved loading algorithm
	byte station_spread;		// amount a station may spread
	bool inflation;					// disable inflation
	bool selectgoods;       // only send the goods to station if a train has been there
	bool longbridges;				// allow 100 tile long bridges
	bool gotodepot;					// allow goto depot in orders
	bool build_rawmaterial_ind;	 // allow building raw material industries
	bool multiple_industry_per_town;	// allow many industries of the same type per town
	bool same_industry_close;	// allow same type industries to be built close to each other
	uint16 lost_train_days;	// if a train doesn't switch order in this amount of days, a train is lost warning is shown
	uint8 order_review_system;
	bool train_income_warn; // if train is generating little income, show a warning
	bool status_long_date;		// always show long date in status bar
	bool signal_side;				// show signals on right side
	bool show_finances;			// show finances at end of year
	bool new_nonstop;				// ttdpatch compatible nonstop handling
	bool roadveh_queue;			// buggy road vehicle queueing
	bool autoscroll;				// scroll when moving mouse to the edge.
	byte errmsg_duration;		// duration of error message
	byte snow_line_height;	// a number 0-15 that configured snow line height
	bool bribe;							// enable bribing the local authority
	bool nonuniform_stations;// allow nonuniform train stations
	bool always_small_airport; // always allow small airports
	bool realistic_acceleration; // realistic acceleration for trains
	bool wagon_speed_limits; // enable wagon speed limits
	bool forbid_90_deg; // forbid trains to make 90 deg turns
	bool invisible_trees; // don't show trees when buildings are transparent
	bool no_servicing_if_no_breakdowns; // dont send vehicles to depot when breakdowns are disabled
	bool link_terraform_toolbar; // display terraform toolbar when displaying rail, road, water and airport toolbars
	bool reverse_scroll; // Right-Click-Scrolling scrolls in the opposite direction

	uint8 toolbar_pos;			// position of toolbars, 0=left, 1=center, 2=right
	uint8 window_snap_radius; // Windows snap at each other if closer than this

	UnitID max_trains;				//max trains in game per player (these are 16bit because the unitnumber field can't hold more)
	UnitID max_roadveh;				//max trucks in game per player
	UnitID max_aircraft;			//max planes in game per player
	UnitID max_ships;					//max ships in game per player

	bool servint_ispercent;	// service intervals are in percents
	uint16 servint_trains;	// service interval for trains
	uint16 servint_roadveh;	// service interval for road vehicles
	uint16 servint_aircraft;// service interval for aircraft
	uint16 servint_ships;		// service interval for ships

	bool autorenew;
	int16 autorenew_months;
	int32 autorenew_money;

	byte pf_maxdepth;				// maximum recursion depth when searching for a train route for new pathfinder
	uint16 pf_maxlength;		// maximum length when searching for a train route for new pathfinder


	bool bridge_pillars;		// show bridge pillars for high bridges

	bool ai_disable_veh_train;		// disable types for AI
	bool ai_disable_veh_roadveh;		// disable types for AI
	bool ai_disable_veh_aircraft;		// disable types for AI
	bool ai_disable_veh_ship;		// disable types for AI
	uint32 starting_date;		// starting date
	uint32 ending_date;		// end of the game (just show highscore)
	uint32 colored_news_date; // when does newspaper become colored?

	bool keep_all_autosave;		// name the autosave in a different way.
	bool autosave_on_exit;		// save an autosave when you quit the game, but do not ask "Do you really want to quit?"
	byte max_num_autosaves;		// controls how many autosavegames are made before the game starts to overwrite (names them 0 to max_num_autosaves - 1)
	bool extra_dynamite;			// extra dynamite

	bool never_expire_vehicles; // never expire vehicles
	byte extend_vehicle_life;	// extend vehicle life by this many years

	bool auto_euro;						// automatically switch to euro in 2002
	bool serviceathelipad;	// service helicopters at helipads automatically (no need to send to depot)
	bool smooth_economy;		// smooth economy
	bool allow_shares;			// allow the buying/selling of shares
	byte dist_local_authority;		// distance for town local authority, default 20

	byte wait_oneway_signal;	//waitingtime in days before a oneway signal
	byte wait_twoway_signal;	//waitingtime in days before a twoway signal

	uint8 map_x; // Size of map
	uint8 map_y;

	byte drag_signals_density; // many signals density
	bool ainew_active;  // Is the new AI active?
	bool ai_in_multiplayer; // Do we allow AIs in multiplayer

	/*
	 * New Path Finding
	 */
	bool new_pathfinding_all; /* Use the newest pathfinding algorithm for all */

	/**
	 * The maximum amount of search nodes a single NPF run should take. This
	 * limit should make sure performance stays at acceptable levels at the cost
	 * of not being perfect anymore. This will probably be fixed in a more
	 * sophisticated way sometime soon
	 */
	uint32 npf_max_search_nodes;

	uint32 npf_rail_firstred_penalty; /* The penalty for when the first signal is red (and it is not an exit or combo signal) */
	uint32 npf_rail_firstred_exit_penalty; /* The penalty for when the first signal is red (and it is an exit or combo signal) */
	uint32 npf_rail_lastred_penalty; /* The penalty for when the last signal is red */
	uint32 npf_rail_station_penalty; /* The penalty for station tiles */
	uint32 npf_rail_slope_penalty; /* The penalty for sloping upwards */
	uint32 npf_rail_curve_penalty; /* The penalty for curves */
	uint32 npf_rail_depot_reverse_penalty; /* The penalty for reversing in depots */
	uint32 npf_buoy_penalty; /* The penalty for going over (through) a buoy */
	uint32 npf_water_curve_penalty; /* The penalty for curves */
	uint32 npf_road_curve_penalty; /* The penalty for curves */
 	uint32 npf_crossing_penalty; /* The penalty for level crossings */

	bool population_in_label; // Show the population of a town in his label?
} Patches;

VARDEF Patches _patches;


typedef struct Cheat {
	bool been_used;	// has this cheat been used before?
	byte value;			// active?
} Cheat;


// WARNING! Do _not_ remove entries in Cheats struct or change the order
// of the existing ones! Would break downward compatibility.
// Only add new entries at the end of the struct!

typedef struct Cheats {
	Cheat magic_bulldozer;		// dynamite industries, unmovables
	Cheat switch_player;			// change to another player
	Cheat money;							// get rich
	Cheat crossing_tunnels;		// allow tunnels that cross each other
	Cheat build_in_pause;			// build while in pause mode
	Cheat no_jetcrash;				// no jet will crash on small airports anymore
	Cheat switch_climate;
	Cheat change_date;				//changes date ingame
	Cheat setup_prod;				//setup raw-material production in game
} Cheats;

VARDEF Cheats _cheats;

typedef struct Paths {
	char *personal_dir;  // includes cfg file and save folder
	char *game_data_dir; // includes data, gm, lang
	char *data_dir;
	char *gm_dir;
	char *lang_dir;
	char *save_dir;
	char *autosave_dir;
	char *scenario_dir;
	char *second_data_dir;
} Paths;

VARDEF Paths _path;

// NOSAVE: Used in palette animations only, not really important.
VARDEF int _timer_counter;


// NOSAVE: can be determined from _date
VARDEF byte _cur_year;
VARDEF byte _cur_month;

VARDEF uint32 _frame_counter;

VARDEF bool _is_old_ai_player; // current player is an oldAI player? (enables a lot of cheats..)

VARDEF bool _do_autosave;
VARDEF int _autosave_ctr;

VARDEF byte _display_opt;
VARDEF byte _pause;
VARDEF int _caret_timer;
VARDEF uint32 _news_display_opt;
VARDEF bool _news_ticker_sound;
VARDEF byte _game_mode;

VARDEF StringID _error_message;
VARDEF int32 _additional_cash_required;

VARDEF uint32 _decode_parameters[20];

VARDEF uint32 _pressed_key; // Low 8 bits = ASCII, High 16 bits = keycode
VARDEF bool _ctrl_pressed;  // Is Ctrl pressed?
VARDEF bool _shift_pressed;  // Is Alt pressed?
VARDEF byte _dirkeys;				// 1=left, 2=up, 4=right, 8=down

VARDEF bool _fullscreen;
VARDEF bool _fast_forward;
VARDEF bool _rightclick_emulate;

// IN/OUT parameters to commands
VARDEF byte _yearly_expenses_type;
VARDEF TileIndex _terraform_err_tile;
VARDEF TileIndex _build_tunnel_endtile;
VARDEF bool _generating_world;

// Deals with the type of the savegame, independent of extension
typedef struct {
	int mode;             // savegame/scenario type (old, new)
	char name[MAX_PATH];  // name
	char title[255];      // internal name of the game
} SmallFiosItem;

// Used when switching from the intro menu.
VARDEF byte _switch_mode;
VARDEF StringID _switch_mode_errorstr;
VARDEF bool _exit_game;
VARDEF SmallFiosItem _file_to_saveload;
VARDEF byte _make_screenshot;

VARDEF byte _get_z_hint; // used as a hint to getslopez to return the right height at a bridge.

VARDEF char *_newgrf_files[32];


VARDEF Vehicle *_place_clicked_vehicle;

VARDEF char _ini_videodriver[16], _ini_musicdriver[16], _ini_sounddriver[16];

// Used for dynamic language support
typedef struct {
	int num; // number of languages
	int curr; // currently selected language index
	char curr_file[32]; // currently selected language file
	StringID dropdown[32 + 1]; // used in settings dialog
	struct {
		char *name;
		char *file;
	} ent[32];
} DynamicLanguages;

VARDEF DynamicLanguages _dynlang;

VARDEF int _num_resolutions;
VARDEF uint16 _resolutions[32][2];
VARDEF uint16 _cur_resolution[2];

VARDEF char _savegame_format[8];

VARDEF char *_config_file;
VARDEF char *_highscore_file;
VARDEF char *_log_file;

// NOSAVE: These can be recalculated from InitializeLandscapeVariables
typedef struct {
	StringID names_s[NUM_CARGO];
	StringID names_long[NUM_CARGO];
	StringID names_short[NUM_CARGO];
	byte weights[NUM_CARGO];
	SpriteID sprites[NUM_CARGO];
	byte transit_days_1[NUM_CARGO];
	byte transit_days_2[NUM_CARGO];
	byte ai_roadveh_start[NUM_CARGO];
	byte ai_roadveh_count[NUM_CARGO];
} CargoConst;

VARDEF CargoConst _cargoc;


static inline void SetDParamX(uint32 *s, uint n, uint32 v)
{
	s[n] = v;
}

static inline uint32 GetDParamX(const uint32 *s, uint n)
{
	return s[n];
}

static inline void SetDParam(uint n, uint32 v)
{
	assert(n < lengthof(_decode_parameters));
	_decode_parameters[n] = v;
}

static inline void SetDParam64(uint n, uint64 v)
{
	assert(n + 1 < lengthof(_decode_parameters));
	_decode_parameters[n + 0] = v & 0xffffffff;
	_decode_parameters[n + 1] = v >> 32;
}

static inline uint32 GetDParam(uint n)
{
	assert(n < lengthof(_decode_parameters));
	return _decode_parameters[n];
}

// Used to bind a C string name to a dparam number.
// NOTE: This has a short lifetime. You can't
//       use this string much later or it will be gone.
void SetDParamStr(uint n, const char *str);

// This function takes a C-string and allocates a temporary string ID.
// The duration of the bound string is valid only until the next acll to GetString,
// so be careful.
StringID BindCString(const char *str);


#define COPY_IN_DPARAM(offs,src,num) memcpy(_decode_parameters + offs, src, sizeof(uint32) * (num))
#define COPY_OUT_DPARAM(dst,offs,num) memcpy(dst,_decode_parameters + offs, sizeof(uint32) * (num))


#define SET_EXPENSES_TYPE(x) _yearly_expenses_type = x;

/* landscape.c */
extern const byte _tileh_to_sprite[32];
extern const byte _inclined_tileh[8];

extern const TileTypeProcs * const _tile_type_procs[16];

/* station_cmd.c */
// there are 5 types of airport (Country (3x4) , City(6x6), Metropolitan(6x6), International(7x7), Heliport(1x1)
// will become obsolete once airports are loaded from seperate file
extern const byte _airport_size_x[];
extern const byte _airport_size_y[];

/* misc */
VARDEF char _screenshot_name[128];
VARDEF byte _vehicle_design_names;

/* Forking stuff */
VARDEF bool _dedicated_forks;

#endif /* VARIABLES_H */