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/* $Id$ */

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/** @file newgrf.cpp */

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#include "stdafx.h"

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#include <stdarg.h>

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#include "openttd.h"

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#include "debug.h"

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#include "gfx.h"

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#include "fileio.h"

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#include "functions.h"

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#include "engine.h"

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#include "spritecache.h"

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#include "station.h"

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#include "sprite.h"

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#include "newgrf.h"

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#include "variables.h"

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#include "string.h"

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#include "strings.h"

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#include "table/strings.h"

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#include "bridge.h"

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#include "town.h"

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#include "economy.h"

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#include "newgrf_engine.h"

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#include "vehicle.h"

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#include "newgrf_text.h"

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#include "table/sprites.h"

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#include "fontcache.h"

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#include "date.h"

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#include "currency.h"

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#include "landscape.h"

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#include "sound.h"

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#include "newgrf_config.h"

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#include "newgrf_house.h"

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#include "newgrf_sound.h"

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#include "newgrf_spritegroup.h"

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#include "helpers.hpp"

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#include "table/town_land.h"

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#include "cargotype.h"

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#include "industry.h"

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#include "newgrf_canal.h"

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#include "newgrf_commons.h"

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#include "newgrf_townname.h"

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/* TTDPatch extended GRF format codec

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 * (c) Petr Baudis 2004 (GPL'd)

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 * Changes by Florian octo Forster are (c) by the OpenTTD development team.

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 *

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 * Contains portions of documentation by TTDPatch team.

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 * Thanks especially to Josef Drexler for the documentation as well as a lot

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 * of help at #tycoon. Also thanks to Michael Blunck for is GRF files which

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 * served as subject to the initial testing of this codec. */

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static int _skip_sprites; // XXX

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static uint _file_index; // XXX

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SpriteID _signal_base;

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SpriteID _coast_base;

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static GRFFile *_cur_grffile;

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GRFFile *_first_grffile;

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static SpriteID _cur_spriteid;

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static GrfLoadingStage _cur_stage;

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static uint32 _nfo_line;

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static GRFConfig *_cur_grfconfig;

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/* Miscellaneous GRF features, set by Action 0x0D, parameter 0x9E */

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static byte _misc_grf_features = 0;

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/* 32 * 8 = 256 flags. Apparently TTDPatch uses this many.. */

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static uint32 _ttdpatch_flags[8];

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/* Used by Action 0x06 to preload a pseudo sprite and modify its content */

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static byte *_preload_sprite = NULL;

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/* Indicates which are the newgrf features currently loaded ingame */

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GRFLoadedFeatures _loaded_newgrf_features;

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enum GrfDataType {

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	GDT_SOUND,

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};

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static byte _grf_data_blocks;

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static GrfDataType _grf_data_type;

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enum grfspec_feature {

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	GSF_TRAIN,

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	GSF_ROAD,

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	GSF_SHIP,

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	GSF_AIRCRAFT,

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	GSF_STATION,

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	GSF_CANAL,

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	GSF_BRIDGE,

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	GSF_TOWNHOUSE,

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	GSF_GLOBALVAR,

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	GSF_INDUSTRYTILES,

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	GSF_INDUSTRIES,

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	GSF_CARGOS,

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	GSF_SOUNDFX,

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};

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typedef void (*SpecialSpriteHandler)(byte *buf, int len);

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static const uint _vehcounts[4] = {

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	/* GSF_TRAIN */    NUM_TRAIN_ENGINES,

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	/* GSF_ROAD */     NUM_ROAD_ENGINES,

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	/* GSF_SHIP */     NUM_SHIP_ENGINES,

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	/* GSF_AIRCRAFT */ NUM_AIRCRAFT_ENGINES

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};

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static const uint _vehshifts[4] = {

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	/* GSF_TRAIN */    0,

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	/* GSF_ROAD */     ROAD_ENGINES_INDEX,

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	/* GSF_SHIP */     SHIP_ENGINES_INDEX,

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	/* GSF_AIRCRAFT */ AIRCRAFT_ENGINES_INDEX,

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};

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enum {

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	MAX_STATIONS = 256,

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};

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static uint16 cargo_allowed[TOTAL_NUM_ENGINES];

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static uint16 cargo_disallowed[TOTAL_NUM_ENGINES];

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/* Contains the GRF ID of the owner of a vehicle if it has been reserved */

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static uint32 _grm_engines[TOTAL_NUM_ENGINES];

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/* Contains the GRF ID of the owner of a cargo if it has been reserved */

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static uint32 _grm_cargos[NUM_CARGO];

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/** DEBUG() function dedicated to newGRF debugging messages

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 * Function is essentialy the same as DEBUG(grf, severity, ...) with the

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 * addition of file:line information when parsing grf files.

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 * NOTE: for the above reason(s) grfmsg() should ONLY be used for

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 * loading/parsing grf files, not for runtime debug messages as there

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 * is no file information available during that time.

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 * @param severity debugging severity level, see debug.h

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 * @param str message in printf() format */

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void CDECL grfmsg(int severity, const char *str, ...)

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{

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	char buf[1024];

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	va_list va;

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	va_start(va, str);

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	vsnprintf(buf, sizeof(buf), str, va);

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	va_end(va);

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	DEBUG(grf, severity, "[%s:%d] %s", _cur_grfconfig->filename, _nfo_line, buf);

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}

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static inline bool check_length(int real, int wanted, const char *str)

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{

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	if (real >= wanted) return true;

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	grfmsg(0, "%s: Invalid pseudo sprite length %d (expected %d)!", str, real, wanted);

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	return false;

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}

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static inline byte grf_load_byte(byte **buf)

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{

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	return *(*buf)++;

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}

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static uint16 grf_load_word(byte **buf)

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{

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	uint16 val = grf_load_byte(buf);

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	return val | (grf_load_byte(buf) << 8);

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}

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static uint16 grf_load_extended(byte** buf)

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{

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	uint16 val;

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	val = grf_load_byte(buf);

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	if (val == 0xFF) val = grf_load_word(buf);

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	return val;

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}

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static uint32 grf_load_dword(byte **buf)

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{

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	uint32 val = grf_load_word(buf);

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	return val | (grf_load_word(buf) << 16);

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}

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static uint32 grf_load_var(byte size, byte **buf)

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{

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	switch (size) {

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		case 1: return grf_load_byte(buf);

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		case 2: return grf_load_word(buf);

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		case 4: return grf_load_dword(buf);

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		default:

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			NOT_REACHED();

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			return 0;

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	}

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}

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static const char *grf_load_string(byte **buf, size_t max_len)

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{

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	const char *string   = *(const char **)buf;

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	size_t string_length = ttd_strnlen(string, max_len);

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	if (string_length == max_len) {

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		/* String was not NUL terminated, so make sure it is now. */

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		(*buf)[string_length - 1] = '\0';

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		grfmsg(7, "String was not terminated with a zero byte.");

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	} else {

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		/* Increase the string length to include the NUL byte. */

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		string_length++;

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	}

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	*buf += string_length;

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	return string;

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}

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static GRFFile *GetFileByGRFID(uint32 grfid)

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{

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	GRFFile *file;

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	for (file = _first_grffile; file != NULL; file = file->next) {

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		if (file->grfid == grfid) break;

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	}

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	return file;

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}

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static GRFFile *GetFileByFilename(const char *filename)

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{

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	GRFFile *file;

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	for (file = _first_grffile; file != NULL; file = file->next) {

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		if (strcmp(file->filename, filename) == 0) break;

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	}

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	return file;

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}

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/** Used when setting an object's property to map to the GRF's strings

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 * while taking in consideration the "drift" between TTDPatch string system and OpenTTD's one

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 * @param grfid Id of the grf file

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 * @param str StringID that we want to have the equivalent in OoenTTD

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 * @return the properly adjusted StringID

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 */

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static StringID MapGRFStringID(uint32 grfid, StringID str)

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{

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	/* 0xD0 and 0xDC stand for all the TextIDs in the range

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	 * of 0xD000 (misc graphics texts) and 0xDC00 (misc persistent texts).

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	 * These strings are unique to each grf file, and thus require to be used with the

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	 * grfid in which they are declared */

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	if (GB(str, 8, 8) == 0xD0 || GB(str, 8, 8) == 0xDC) {

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		return GetGRFStringID(grfid, str);

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	}

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	/* We have some changes in our cargo strings, resulting in some missing. */

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	if (str >= 0x006E && str <= 0x008D) return str - 0x20;

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	if (str >= 0x008E && str <= 0x00AD) return str - 0x20;

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	/* Map building names according to our lang file changes

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	 * 0x200F = Tall Office Block, first house name in the original data, the one that TTDPatch stil uses

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	 * 0x201F = Old houses is the last house name.

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	 * OpenTTD does not have exactly the same order aymore, so, the code below allows

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	 * to compensate for the difference */

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	if (str >= 0x200F && str <= 0x201F) return str + (STR_200F_TALL_OFFICE_BLOCK - 0x200F);

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	return str;

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}

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static uint8 MapDOSColour(uint8 colour)

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{

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	if (_use_dos_palette) return colour;

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	if (colour < 10) {

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		static uint8 dos_to_win_colour_map[] = { 0, 215, 216, 136, 88, 106, 32, 33, 40, 245 };

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		return dos_to_win_colour_map[colour];

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	}

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	if (colour >= 245 && colour < 254) return colour - 28;

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	return colour;

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}

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typedef bool (*VCI_Handler)(uint engine, int numinfo, int prop, byte **buf, int len);

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static void dewagonize(int condition, int engine)

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{

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	EngineInfo *ei = &_engine_info[engine];

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	RailVehicleInfo *rvi = &_rail_vehicle_info[engine];

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	if (condition != 0) {

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		ei->unk2 &= ~0x80;

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		if (rvi->railveh_type == RAILVEH_WAGON)

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			rvi->railveh_type = RAILVEH_SINGLEHEAD;

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	} else {

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		ei->unk2 |= 0x80;

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		rvi->railveh_type = RAILVEH_WAGON;

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	}

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}

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static bool RailVehicleChangeInfo(uint engine, int numinfo, int prop, byte **bufp, int len)

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{

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	byte *buf = *bufp;

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	bool ret = false;

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				uint8 tracktype = grf_load_byte(&buf);

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				switch (tracktype) {

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					default:

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						grfmsg(1, "RailVehicleChangeInfo: Invalid track type %d specified, ignoring", tracktype);

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						break;

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				}

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				uint16 speed = grf_load_word(&buf);

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				if (speed == 0xFFFF) speed = 0;

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				uint16 power = grf_load_word(&buf);

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				dewagonize(power, engine + i);

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				uint8 runcostfact = grf_load_byte(&buf);

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				uint32 base = grf_load_dword(&buf);

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				switch (base) {

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					case 0: break; // Used by wagons

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					default:

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						grfmsg(1, "RailVehicleChangeInfo: Unsupported running cost base 0x%04X, ignoring", base);

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						break;

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				}

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				uint8 spriteid = grf_load_byte(&buf);

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				/* TTD sprite IDs point to a location in a 16bit array, but we use it

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				 * as an array index, so we need it to be half the original value. */

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				if (spriteid < 0xFD) spriteid >>= 1;

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				uint8 dual = grf_load_byte(&buf);

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				if (dual != 0) {

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						// adjust power and running cost if needed

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					}

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				} else {

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						// adjust power and running cost if needed

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					}

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						RAILVEH_WAGON : RAILVEH_SINGLEHEAD;

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				}

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				uint8 ctype = grf_load_byte(&buf);

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				if (ctype < NUM_CARGO && HASBIT(_cargo_mask, ctype)) {

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				} else {

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					grfmsg(2, "RailVehicleChangeInfo: Invalid cargo type %d, using first refittable", ctype);

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				}

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				uint8 traction = grf_load_byte(&buf);

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				EngineClass engclass;

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				if (traction <= 0x07) {

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					engclass = EC_STEAM;

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				} else if (traction <= 0x27) {

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					engclass = EC_DIESEL;

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				} else if (traction <= 0x31) {

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					engclass = EC_ELECTRIC;

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				} else if (traction <= 0x37) {

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					engclass = EC_MONORAIL;

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				} else if (traction <= 0x41) {

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					engclass = EC_MAGLEV;

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				} else {

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					break;

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				}

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				EngineID pos = grf_load_byte(&buf);

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				if (pos < NUM_TRAIN_ENGINES) {

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					AlterRailVehListOrder(engine + i, pos);

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				} else {

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					grfmsg(2, "RailVehicleChangeInfo: Invalid train engine ID %d, ignoring", pos);

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				}