/* $Id$ */
/** @file openttd.h */

#ifndef OPENTTD_H
#define OPENTTD_H

#ifndef VARDEF
#define VARDEF extern
#endif

// use this on non static functions
#define PUBLIC

typedef struct Rect {
	int left,top,right,bottom;
} Rect;

typedef struct SmallPoint {
	int16 x,y;
} SmallPoint;

typedef struct Point {
	int x,y;
} Point;

typedef struct Pair {
	int a;
	int b;
} Pair;

/**
 * Is used as a general sortable struct (using qsort and friends). Is used for
 * sorting vehicles and stations at the moment
 */
typedef struct SortStruct {
	uint32	index;
	byte		owner;
} SortStruct;

typedef struct YearMonthDay {
	int year, month, day;
} YearMonthDay;

/* --- 1 Day is 74 ticks ---
* The game's internal structure is dictated by ticks. The date counter (date_fract) is an integer of
* uint16 type, so it can have a max value of 65536. Every tick this variable (date_fract) is
* increased by 885. When it overflows, the new day loop is called.
* * this that means 1 day is : 65536 / 885 = 74 ticks
* * 1 tick is approximately 27ms.
* * 1 day is thus about 2 seconds (74*27 = 1998) on a machine that can run OpenTTD normally
*/
#define DAY_TICKS 74
#define MAX_YEAR_BEGIN_REAL 1920
#define MAX_YEAR_END_REAL 2090
#define MAX_YEAR_END 170

#include "map.h"

// Forward declarations of structs.
typedef struct Vehicle Vehicle;
typedef struct Depot Depot;
typedef struct Waypoint Waypoint;
typedef struct Window Window;
typedef struct Station Station;
typedef struct ViewPort ViewPort;
typedef struct Town Town;
typedef struct NewsItem NewsItem;
typedef struct Industry Industry;
typedef struct DrawPixelInfo DrawPixelInfo;
typedef uint16 VehicleID;
typedef byte PlayerID;
typedef byte OrderID;
typedef byte CargoID;
typedef uint16 StringID;
typedef uint32 SpriteID;    //! The number of a sprite, without mapping bits and colortables
typedef uint32 PalSpriteID; //! The number of a sprite plus all the mapping bits and colortables
typedef uint32 CursorID;
typedef uint16 EngineID; //! All enginenumbers should be of this type
typedef uint16 UnitID;   //! All unitnumber stuff is of this type (or anyway, should be)

typedef uint32 WindowNumber;
typedef byte WindowClass;


enum GameModes {
	GM_MENU,
	GM_NORMAL,
	GM_EDITOR
};

enum SwitchModes {
	SM_NONE = 0,
	SM_NEWGAME = 1,
	SM_EDITOR = 2,
	SM_LOAD = 3,
	SM_MENU = 4,
	SM_SAVE = 5,
	SM_GENRANDLAND = 6,
	SM_LOAD_SCENARIO = 9,
	SM_START_SCENARIO = 10,
};

typedef enum TransportTypes {
	/* These constants are for now linked to the representation of bridges
	 * and tunnels, so they can be used by GetTileTrackStatus_TunnelBridge
	 * to compare against the map5 array. In an ideal world, these
	 * constants would be used everywhere when accessing tunnels and
	 * bridges. For now, you should just not change the values for road
	 * and rail.
	 */
  TRANSPORT_RAIL = 0,
	TRANSPORT_ROAD = 1,
	TRANSPORT_WATER,	// = 2
	TRANSPORT_END,
	INVALID_TRANSPORT = 0xff,
} TransportType;

typedef struct TileInfo {
	uint x;
	uint y;
	uint tileh;
	uint type;
	uint map5;
	TileIndex tile;
	uint z;
} TileInfo;

enum {
	NG_EDGE = 1,
};

/* Display Options */
enum {
	DO_SHOW_TOWN_NAMES =    1 << 0,
	DO_SHOW_STATION_NAMES = 1 << 1,
	DO_SHOW_SIGNS =         1 << 2,
	DO_FULL_ANIMATION =     1 << 3,
	DO_TRANS_BUILDINGS =    1 << 4,
	DO_FULL_DETAIL =        1 << 5,
	DO_WAYPOINTS =          1 << 6,
	DO_TRANS_SIGNS =        1 << 7,
};

/* Landscape types */
enum {
	LT_NORMAL = 0,
	LT_HILLY = 1,
	LT_DESERT = 2,
	LT_CANDY = 3,

	NUM_LANDSCAPE = 4,
};

enum {
	NUM_PRICES = 49,
};

typedef struct Prices {
	int32 station_value;
	int32 build_rail;
	int32 build_road;
	int32 build_signals;
	int32 build_bridge;
	int32 build_train_depot;
	int32 build_road_depot;
	int32 build_ship_depot;
	int32 build_tunnel;
	int32 train_station_track;
	int32 train_station_length;
	int32 build_airport;
	int32 build_bus_station;
	int32 build_truck_station;
	int32 build_dock;
	int32 build_railvehicle;
	int32 build_railwagon;
	int32 aircraft_base;
	int32 roadveh_base;
	int32 ship_base;
	int32 build_trees;
	int32 terraform;
	int32 clear_1;
	int32 purchase_land;
	int32 clear_2;
	int32 clear_3;
	int32 remove_trees;
	int32 remove_rail;
	int32 remove_signals;
	int32 clear_bridge;
	int32 remove_train_depot;
	int32 remove_road_depot;
	int32 remove_ship_depot;
	int32 clear_tunnel;
	int32 clear_water;
	int32 remove_rail_station;
	int32 remove_airport;
	int32 remove_bus_station;
	int32 remove_truck_station;
	int32 remove_dock;
	int32 remove_house;
	int32 remove_road;
	int32 running_rail[3];
	int32 aircraft_running;
	int32 roadveh_running;
	int32 ship_running;
	int32 build_industry;
} Prices;

#define GAME_DIFFICULTY_NUM 18

typedef struct GameDifficulty {
	int max_no_competitors;
	int competitor_start_time;
	int number_towns;
	int number_industries;
	int max_loan;
	int initial_interest;
	int vehicle_costs;
	int competitor_speed;
	int competitor_intelligence; // no longer in use
	int vehicle_breakdowns;
	int subsidy_multiplier;
	int construction_cost;
	int terrain_type;
	int quantity_sea_lakes;
	int economy;
	int line_reverse_mode;
	int disasters;
	int town_council_tolerance;	// minimum required town ratings to be allowed to demolish stuff
} GameDifficulty;

enum {
	// Temperate
	CT_PASSENGERS = 0,
	CT_COAL = 1,
	CT_MAIL = 2,
	CT_OIL = 3,
	CT_LIVESTOCK = 4,
	CT_GOODS = 5,
	CT_GRAIN = 6,
	CT_WOOD = 7,
	CT_IRON_ORE = 8,
	CT_STEEL = 9,
	CT_VALUABLES = 10,
	CT_FOOD = 11,

	// Arctic
	CT_WHEAT = 6,
	CT_HILLY_UNUSED = 8,
	CT_PAPER = 9,
	CT_GOLD = 10,

	// Tropic
	CT_RUBBER = 1,
	CT_FRUIT = 4,
	CT_MAIZE = 6,
	CT_COPPER_ORE = 8,
	CT_WATER = 9,
	CT_DIAMONDS = 10,

	// Toyland
	CT_SUGAR = 1,
	CT_TOYS = 3,
	CT_BATTERIES = 4,
	CT_CANDY = 5,
	CT_TOFFEE = 6,
	CT_COLA = 7,
	CT_COTTON_CANDY = 8,
	CT_BUBBLES = 9,
	CT_PLASTIC = 10,
	CT_FIZZY_DRINKS = 11,

	NUM_CARGO = 12,

	CT_INVALID = 0xFF
};

typedef uint AcceptedCargo[NUM_CARGO];

typedef struct TileDesc {
	StringID str;
	byte owner;
	uint16 build_date;
	uint32 dparam[2];
} TileDesc;

typedef struct {
	int32 left;
	int32 top;
	byte width_1, width_2;
} ViewportSign;

typedef int32 CommandProc(int x, int y, uint32 flags, uint32 p1, uint32 p2);

typedef void DrawTileProc(TileInfo *ti);
typedef uint GetSlopeZProc(const TileInfo* ti);
typedef int32 ClearTileProc(TileIndex tile, byte flags);
typedef void GetAcceptedCargoProc(TileIndex tile, AcceptedCargo res);
typedef void GetTileDescProc(TileIndex tile, TileDesc *td);
/* GetTileTrackStatusProcs return a value that contains the possible tracks
 * that can be taken on a given tile by a given transport. The return value is
 * composed as follows: 0xaabbccdd. ccdd and aabb are bitmasks of trackdirs,
 * where bit n corresponds to trackdir n. ccdd are the trackdirs that are
 * present in the tile (1==present, 0==not present), aabb is the signal
 * status, if applicable (0==green/no signal, 1==red, note that this is
 * reversed from map3/2[tile] for railway signals).
 *
 * The result (let's call it ts) is often used as follows:
 * tracks = (byte)(ts | ts >>8)
 * This effectively converts the present part of the result (ccdd) to a
 * track bitmask, which disregards directions. Normally, this is the same as just
 * doing (byte)ts I think, although I am not really sure
 *
 * A trackdir is combination of a track and a dir, where the lower three bits
 * are a track, the fourth bit is the direction. these give 12 (or 14)
 * possible options: 0-5 and 8-13, so we need 14 bits for a trackdir bitmask
 * above.
 */
typedef uint32 GetTileTrackStatusProc(TileIndex tile, TransportType mode);
typedef void GetProducedCargoProc(TileIndex tile, byte *b);
typedef void ClickTileProc(TileIndex tile);
typedef void AnimateTileProc(TileIndex tile);
typedef void TileLoopProc(TileIndex tile);
typedef void ChangeTileOwnerProc(TileIndex tile, PlayerID old_player, PlayerID new_player);
/* Return value has bit 0x2 set, when the vehicle enters a station. Then,
 * result << 8 contains the id of the station entered. If the return value has
 * bit 0x8 set, the vehicle could not and did not enter the tile. Are there
 * other bits that can be set? */
typedef uint32 VehicleEnterTileProc(Vehicle *v, TileIndex tile, int x, int y);
typedef void VehicleLeaveTileProc(Vehicle *v, TileIndex tile, int x, int y);
typedef uint GetSlopeTilehProc(const TileInfo *ti);

typedef struct {
	DrawTileProc *draw_tile_proc;
	GetSlopeZProc *get_slope_z_proc;
	ClearTileProc *clear_tile_proc;
	GetAcceptedCargoProc *get_accepted_cargo_proc;
	GetTileDescProc *get_tile_desc_proc;
	GetTileTrackStatusProc *get_tile_track_status_proc;
	ClickTileProc *click_tile_proc;
	AnimateTileProc *animate_tile_proc;
	TileLoopProc *tile_loop_proc;
	ChangeTileOwnerProc *change_tile_owner_proc;
	GetProducedCargoProc *get_produced_cargo_proc;
	VehicleEnterTileProc *vehicle_enter_tile_proc;
	VehicleLeaveTileProc *vehicle_leave_tile_proc;
	GetSlopeTilehProc *get_slope_tileh_proc;
} TileTypeProcs;



#define MP_SETTYPE(x) ((x+1) << 8)

enum {
	MP_MAP2 = 1<<0,
	MP_MAP3LO = 1<<1,
	MP_MAP3HI = 1<<2,
	MP_MAP5 = 1<<3,
	MP_MAPOWNER_CURRENT = 1<<4,
	MP_MAPOWNER = 1<<5,

	MP_TYPE_MASK = 0xF << 8,

	MP_MAP2_CLEAR = 1 << 12,
	MP_MAP3LO_CLEAR = 1 << 13,
	MP_MAP3HI_CLEAR = 1 << 14,

	MP_NODIRTY = 1<<15,
};

enum {
	WC_MAIN_WINDOW = 0x0,
	WC_MAIN_TOOLBAR = 0x1,
	WC_STATUS_BAR = 0x2,
	WC_BUILD_TOOLBAR = 0x3,
	WC_NEWS_WINDOW = 0x4,
	WC_TOWN_DIRECTORY = 0x5,
	WC_STATION_LIST = 0x6,
	WC_TOWN_VIEW = 0x7,
	WC_SMALLMAP = 0x8,
	WC_TRAINS_LIST = 0x9,
	WC_ROADVEH_LIST = 0xA,
	WC_SHIPS_LIST = 0xB,
	WC_AIRCRAFT_LIST = 0xC,
	WC_VEHICLE_VIEW = 0xD,
	WC_VEHICLE_DETAILS = 0xE,
	WC_VEHICLE_REFIT = 0xF,
	WC_VEHICLE_ORDERS = 0x10,
	WC_STATION_VIEW = 0x11,
	WC_VEHICLE_DEPOT = 0x12,
	WC_BUILD_VEHICLE = 0x13,
	WC_BUILD_BRIDGE = 0x14,
	WC_ERRMSG = 0x15,
	WC_ASK_ABANDON_GAME = 0x16,
	WC_QUIT_GAME = 0x17,
	WC_BUILD_STATION = 0x18,
	WC_BUS_STATION = 0x19,
	WC_TRUCK_STATION = 0x1A,
	WC_BUILD_DEPOT = 0x1B,
	WC_DEBUGGER = 0x1C,
	WC_COMPANY = 0x1D,
	WC_FINANCES = 0x1E,
	WC_PLAYER_COLOR = 0x1F,
	WC_QUERY_STRING = 0x20,
	WC_SAVELOAD = 0x21,
	WC_SELECT_GAME = 0x22,
	WC_TOOLBAR_MENU = 0x24,
	WC_INCOME_GRAPH = 0x25,
	WC_OPERATING_PROFIT = 0x26,
	WC_TOOLTIPS = 0x27,
	WC_INDUSTRY_VIEW = 0x28,
	WC_PLAYER_FACE = 0x29,
	WC_LAND_INFO = 0x2A,
	WC_TOWN_AUTHORITY = 0x2B,
	WC_SUBSIDIES_LIST = 0x2C,
	WC_GRAPH_LEGEND = 0x2D,
	WC_DELIVERED_CARGO = 0x2E,
	WC_PERFORMANCE_HISTORY = 0x2F,
	WC_COMPANY_VALUE = 0x30,
	WC_COMPANY_LEAGUE = 0x31,
	WC_BUY_COMPANY = 0x32,
	WC_PAYMENT_RATES = 0x33,
	WC_SELECT_TUTORIAL = 0x34,
	WC_ENGINE_PREVIEW = 0x35,
	WC_MUSIC_WINDOW = 0x36,
	WC_MUSIC_TRACK_SELECTION = 0x37,
	WC_SCEN_LAND_GEN = 0x38, // also used for landscaping toolbar
	WC_ASK_RESET_LANDSCAPE = 0x39,
	WC_SCEN_TOWN_GEN = 0x3A,
	WC_SCEN_INDUSTRY = 0x3B,
	WC_SCEN_BUILD_ROAD = 0x3C,
	WC_BUILD_TREES = 0x3D,
	WC_SEND_NETWORK_MSG = 0x3E,
	WC_DROPDOWN_MENU = 0x3F,
	WC_BUILD_INDUSTRY = 0x40,
	WC_GAME_OPTIONS = 0x41,
	WC_NETWORK_WINDOW = 0x42,
	WC_INDUSTRY_DIRECTORY = 0x43,
	WC_MESSAGE_HISTORY = 0x44,
	WC_CHEATS = 0x45,
	WC_PERFORMANCE_DETAIL = 0x46,
	WC_CONSOLE = 0x47,
	WC_EXTRA_VIEW_PORT = 0x48,
	WC_CLIENT_LIST = 0x49,
	WC_NETWORK_STATUS_WINDOW = 0x4A,
	WC_CUSTOM_CURRENCY = 0x4B,
	WC_REPLACE_VEHICLE = 0x4C,
	WC_HIGHSCORE = 0x4D,
	WC_ENDSCREEN = 0x4E,
	WC_SIGN_LIST = 0x4F,
};


enum {
	EXPENSES_CONSTRUCTION = 0,
	EXPENSES_NEW_VEHICLES = 1,
	EXPENSES_TRAIN_RUN = 2,
	EXPENSES_ROADVEH_RUN = 3,
	EXPENSES_AIRCRAFT_RUN = 4,
	EXPENSES_SHIP_RUN = 5,
	EXPENSES_PROPERTY = 6,
	EXPENSES_TRAIN_INC = 7,
	EXPENSES_ROADVEH_INC = 8,
	EXPENSES_AIRCRAFT_INC = 9,
	EXPENSES_SHIP_INC = 10,
	EXPENSES_LOAN_INT = 11,
	EXPENSES_OTHER = 12,
};

// special string constants
enum SpecialStrings {

	// special strings for town names. the town name is generated dynamically on request.
	SPECSTR_TOWNNAME_START = 0x20C0,
	SPECSTR_TOWNNAME_ENGLISH = SPECSTR_TOWNNAME_START,
	SPECSTR_TOWNNAME_FRENCH,
	SPECSTR_TOWNNAME_GERMAN,
	SPECSTR_TOWNNAME_AMERICAN,
	SPECSTR_TOWNNAME_LATIN,
	SPECSTR_TOWNNAME_SILLY,
	SPECSTR_TOWNNAME_SWEDISH,
	SPECSTR_TOWNNAME_DUTCH,
	SPECSTR_TOWNNAME_FINNISH,
	SPECSTR_TOWNNAME_POLISH,
	SPECSTR_TOWNNAME_SLOVAKISH,
	SPECSTR_TOWNNAME_NORWEGIAN,
	SPECSTR_TOWNNAME_HUNGARIAN,
	SPECSTR_TOWNNAME_AUSTRIAN,
	SPECSTR_TOWNNAME_ROMANIAN,
	SPECSTR_TOWNNAME_CZECH,
	SPECSTR_TOWNNAME_SWISS,
	SPECSTR_TOWNNAME_DANISH,
	SPECSTR_TOWNNAME_LAST = SPECSTR_TOWNNAME_DANISH,

	// special strings for player names on the form "TownName transport".
	SPECSTR_PLAYERNAME_START = 0x70EA,
	SPECSTR_PLAYERNAME_ENGLISH = SPECSTR_PLAYERNAME_START,
	SPECSTR_PLAYERNAME_FRENCH,
	SPECSTR_PLAYERNAME_GERMAN,
	SPECSTR_PLAYERNAME_AMERICAN,
	SPECSTR_PLAYERNAME_LATIN,
	SPECSTR_PLAYERNAME_SILLY,
	SPECSTR_PLAYERNAME_LAST = SPECSTR_PLAYERNAME_SILLY,

	SPECSTR_ANDCO_NAME = 0x70E6,
	SPECSTR_PRESIDENT_NAME = 0x70E7,
	SPECSTR_SONGNAME = 0x70E8,

	// reserve 32 strings for the *.lng files
	SPECSTR_LANGUAGE_START = 0x7100,
	SPECSTR_LANGUAGE_END = 0x711f,

	// reserve 32 strings for various screen resolutions
	SPECSTR_RESOLUTION_START = 0x7120,
	SPECSTR_RESOLUTION_END = 0x713f,

	// reserve 32 strings for screenshot formats
	SPECSTR_SCREENSHOT_START = 0x7140,
	SPECSTR_SCREENSHOT_END = 0x715F,

	// Used to implement SetDParamStr
	STR_SPEC_DYNSTRING = 0xF800,
	STR_SPEC_USERSTRING = 0xF808,
};

typedef void PlaceProc(TileIndex tile);

enum {
	SORT_ASCENDING  = 0,
	SORT_DESCENDING = 1,
	SORT_BY_DATE    = 0,
	SORT_BY_NAME    = 2
};

VARDEF byte _savegame_sort_order;

#define INVALID_UINT_TILE (uint)0xFFFFFFFF
#define INVALID_STRING_ID 0xFFFF

enum {
	MAX_SCREEN_WIDTH = 2048,
	MAX_SCREEN_HEIGHT = 1200,
};

/* In certain windows you navigate with the arrow keys. Do not scroll the
 * gameview when here. Bitencoded variable that only allows scrolling if all
 * elements are zero */
enum {
	SCROLL_CON =  0,
	SCROLL_EDIT = 1,
	SCROLL_SAVE = 2,
	SCROLL_CHAT = 4,
};
VARDEF byte _no_scroll;

/** To have a concurrently running thread interface with the main program, use
 * the OTTD_SendThreadMessage() function. Actions to perform upon the message are handled
 * in the ProcessSentMessage() function */
typedef enum ThreadMsgs {
	MSG_OTTD_SAVETHREAD_START  = 1,
	MSG_OTTD_SAVETHREAD_DONE   = 2,
	MSG_OTTD_SAVETHREAD_ERROR  = 3,
} ThreadMsg;

void OTTD_SendThreadMessage(ThreadMsg msg);

#endif /* OPENTTD_H */