1

/* $Id$ */

     2

     3

#include "../../stdafx.h"

     4

#include "../../openttd.h"

     5

#include "../../functions.h"

     6

#include "../../map.h"

     7

#include "../../tile.h"

     8

#include "../../player.h"

     9

#include "../../vehicle.h"

    10

#include "../../engine.h"

    11

#include "../../command.h"

    12

#include "../../town.h"

    13

#include "../../industry.h"

    14

#include "../../station.h"

    15

#include "../../pathfind.h"

    16

#include "../../economy.h"

    17

#include "../../airport.h"

    18

#include "../../depot.h"

    19

#include "../../variables.h"

    20

#include "default.h"

    21

    22

// remove some day perhaps?

    23

static Player *_cur_ai_player;

    24

static uint _ai_service_interval;

    25

    26

typedef void AiStateAction(Player *p);

    27

    28

enum {

    29

	AIS_0 = 0,

    30

	AIS_1 = 1,

    31

	AIS_VEH_LOOP = 2,

    32

	AIS_VEH_CHECK_REPLACE_VEHICLE = 3,

    33

	AIS_VEH_DO_REPLACE_VEHICLE = 4,

    34

	AIS_WANT_NEW_ROUTE = 5,

    35

	AIS_BUILD_DEFAULT_RAIL_BLOCKS = 6,

    36

	AIS_BUILD_RAIL = 7,

    37

	AIS_BUILD_RAIL_VEH = 8,

    38

	AIS_DELETE_RAIL_BLOCKS = 9,

    39

	AIS_BUILD_DEFAULT_ROAD_BLOCKS = 10,

    40

	AIS_BUILD_ROAD = 11,

    41

	AIS_BUILD_ROAD_VEHICLES = 12,

    42

	AIS_DELETE_ROAD_BLOCKS = 13,

    43

	AIS_AIRPORT_STUFF = 14,

    44

	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,

    45

	AIS_BUILD_AIRCRAFT_VEHICLES = 16,

    46

	AIS_CHECK_SHIP_STUFF = 17,

    47

	AIS_BUILD_DEFAULT_SHIP_BLOCKS = 18,

    48

	AIS_DO_SHIP_STUFF = 19,

    49

	AIS_SELL_VEHICLE = 20,

    50

	AIS_REMOVE_STATION = 21,

    51

	AIS_REMOVE_TRACK = 22,

    52

	AIS_REMOVE_SINGLE_RAIL_TILE = 23

    53

};

    54

    55

    56

#include "../../table/ai_rail.h"

    57

    58

static byte GetRailTrackStatus(TileIndex tile) {

    59

	uint32 r = GetTileTrackStatus(tile, TRANSPORT_RAIL);

    60

	return (byte) (r | r >> 8);

    61

}

    62

    63

    64

static void AiCase0(Player *p)

    65

{

    66

	p->ai.state = AIS_REMOVE_TRACK;

    67

	p->ai.state_counter = 0;

    68

}

    69

    70

static void AiCase1(Player *p)

    71

{

    72

	p->ai.cur_veh = NULL;

    73

	p->ai.state = AIS_VEH_LOOP;

    74

}

    75

    76

static void AiStateVehLoop(Player *p)

    77

{

    78

	Vehicle *v;

    79

	uint index;

    80

    81

	index = (p->ai.cur_veh == NULL) ? 0 : p->ai.cur_veh->index + 1;

    82

    83

	FOR_ALL_VEHICLES_FROM(v, index) {

    84

		if (v->type == 0 || v->owner != _current_player)

    85

			continue;

    86

    87

		if ((v->type == VEH_Train && v->subtype==0) ||

    88

				v->type == VEH_Road ||

    89

				(v->type == VEH_Aircraft && v->subtype <= 2) ||

    90

				v->type == VEH_Ship) {

    91

    92

			/* replace engine? */

    93

			if (v->type == VEH_Train && v->engine_type < 3 &&

    94

					(_price.build_railvehicle >> 3) < p->player_money) {

    95

				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;

    96

				p->ai.cur_veh = v;

    97

				return;

    98

			}

    99

   100

			/* not profitable? */

   101

			if (v->age >= 730 &&

   102

					v->profit_last_year < _price.station_value*5 &&

   103

					v->profit_this_year < _price.station_value*5) {

   104

				p->ai.state_counter = 0;

   105

				p->ai.state = AIS_SELL_VEHICLE;

   106

				p->ai.cur_veh = v;

   107

				return;

   108

			}

   109

   110

			/* not reliable? */

   111

			if ((v->age != 0 &&

   112

					GetEngine(v->engine_type)->reliability < 35389) ||

   113

					v->age >= v->max_age) {

   114

				p->ai.state = AIS_VEH_CHECK_REPLACE_VEHICLE;

   115

				p->ai.cur_veh = v;

   116

				return;

   117

			}

   118

		}

   119

	}

   120

   121

	p->ai.state = AIS_WANT_NEW_ROUTE;

   122

	p->ai.state_counter = 0;

   123

}

   124

   125

static EngineID AiChooseTrainToBuild(byte railtype, int32 money, byte flag, TileIndex tile)

   126

{

   127

	EngineID best_veh_index = INVALID_ENGINE;

   128

	byte best_veh_score = 0;

   129

	int32 ret;

   130

	EngineID i;

   131

   132

	for (i = 0; i < NUM_TRAIN_ENGINES; i++) {

   133

		const RailVehicleInfo *rvi = RailVehInfo(i);

   134

		const Engine* e = GetEngine(i);

   135

   136

		if (e->railtype != railtype ||

   137

				rvi->flags & RVI_WAGON ||

   138

				(rvi->flags & RVI_MULTIHEAD && flag & 1) ||

   139

				!HASBIT(e->player_avail, _current_player) ||

   140

				e->reliability < 0x8A3D) {

   141

			continue;

   142

		}

   143

   144

		ret = DoCommandByTile(tile, i, 0, 0, CMD_BUILD_RAIL_VEHICLE);

   145

		if (!CmdFailed(ret) && ret <= money &&

   146

				_cmd_build_rail_veh_score >= best_veh_score) {

   147

			best_veh_score = _cmd_build_rail_veh_score;

   148

			best_veh_index = i;

   149

		}

   150

	}

   151

   152

	return best_veh_index;

   153

}

   154

   155

static EngineID AiChooseRoadVehToBuild(byte cargo, int32 money, TileIndex tile)

   156

{

   157

	EngineID best_veh_index = INVALID_ENGINE;

   158

	int32 best_veh_cost = 0;

   159

	int32 ret;

   160

   161

	EngineID i = _cargoc.ai_roadveh_start[cargo];

   162

	EngineID end = i + _cargoc.ai_roadveh_count[cargo];

   163

	const Engine* e = GetEngine(i);

   164

   165

	do {

   166

		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)

   167

			continue;

   168

   169

		ret = DoCommandByTile(tile, i, 0, 0, CMD_BUILD_ROAD_VEH);

   170

		if (!CmdFailed(ret) && ret <= money && ret >= best_veh_cost) {

   171

			best_veh_cost = ret;

   172

			best_veh_index = i;

   173

		}

   174

	} while (++e, ++i != end);

   175

   176

	return best_veh_index;

   177

}

   178

   179

static EngineID AiChooseAircraftToBuild(int32 money, byte flag)

   180

{

   181

	EngineID best_veh_index = INVALID_ENGINE;

   182

	int32 best_veh_cost = 0;

   183

	int32 ret;

   184

   185

	EngineID i = AIRCRAFT_ENGINES_INDEX;

   186

	EngineID end = i + NUM_AIRCRAFT_ENGINES;

   187

	const Engine* e = GetEngine(i);

   188

   189

	do {

   190

		if (!HASBIT(e->player_avail, _current_player) || e->reliability < 0x8A3D)

   191

			continue;

   192

   193

		if (flag&1) {

   194

			if (i<253) continue;

   195

		} else {

   196

			if (i>=253) continue;

   197

		}

   198

   199

		ret = DoCommandByTile(0, i, 0, DC_QUERY_COST, CMD_BUILD_AIRCRAFT);

   200

		if (!CmdFailed(ret) && ret <= money && ret >= best_veh_cost) {

   201

			best_veh_cost = ret;

   202

			best_veh_index = i;

   203

		}

   204

	} while (++e, ++i != end);

   205

   206

	return best_veh_index;

   207

}

   208

   209

static int32 AiGetBasePrice(Player *p)

   210

{

   211

	int32 base = _price.station_value;

   212

   213

	// adjust base price when more expensive vehicles are available

   214

	if (p->ai.railtype_to_use == 1) base = (base * 3) >> 1;

   215

	else if (p->ai.railtype_to_use == 2) base *= 2;

   216

   217

	return base;

   218

}

   219

   220

#if 0

   221

static EngineID AiChooseShipToBuild(byte cargo, int32 money)

   222

{

   223

	// XXX: not done

   224

	return INVALID_ENGINE;

   225

}

   226

#endif

   227

   228

static EngineID AiChooseRoadVehToReplaceWith(Player* p, Vehicle* v)

   229

{

   230

	int32 avail_money = p->player_money + v->value;

   231

	return AiChooseRoadVehToBuild(v->cargo_type, avail_money, v->tile);

   232

}

   233

   234

static EngineID AiChooseAircraftToReplaceWith(Player* p, Vehicle* v)

   235

{

   236

	int32 avail_money = p->player_money + v->value;

   237

	return AiChooseAircraftToBuild(avail_money, v->engine_type>=253?1:0);

   238

}

   239

   240

static EngineID AiChooseTrainToReplaceWith(Player* p, Vehicle* v)

   241

{

   242

	int32 avail_money = p->player_money + v->value;

   243

	int num=0;

   244

	Vehicle *u = v;

   245

   246

	while (++num, u->next != NULL) {

   247

		u = u->next;

   248

	}

   249

   250

	// XXX: check if a wagon

   251

	return AiChooseTrainToBuild(v->u.rail.railtype, avail_money, 0, v->tile);

   252

}

   253

   254

static EngineID AiChooseShipToReplaceWith(Player* p, Vehicle* v)

   255

{

   256

	error("!AiChooseShipToReplaceWith");

   257

   258

	/* maybe useless, but avoids compiler warning this way */

   259

	return INVALID_ENGINE;

   260

}

   261

   262

static void AiHandleGotoDepot(Player *p, int cmd)

   263

{

   264

	if (p->ai.cur_veh->current_order.type != OT_GOTO_DEPOT)

   265

		DoCommandByTile(0, p->ai.cur_veh->index, 0, DC_EXEC, cmd);

   266

   267

	if (++p->ai.state_counter <= 1387) {

   268

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   269

		return;

   270

	}

   271

   272

	if (p->ai.cur_veh->current_order.type == OT_GOTO_DEPOT) {

   273

		p->ai.cur_veh->current_order.type = OT_DUMMY;

   274

		p->ai.cur_veh->current_order.flags = 0;

   275

		InvalidateWindow(WC_VEHICLE_VIEW, p->ai.cur_veh->index);

   276

	}

   277

}

   278

   279

static void AiRestoreVehicleOrders(Vehicle *v, BackuppedOrders *bak)

   280

{

   281

	uint i;

   282

   283

	for (i = 0; bak->order[i].type != OT_NOTHING; i++) {

   284

		if (CmdFailed(DoCommandP(0, v->index + (i << 16), PackOrder(&bak->order[i]), NULL, CMD_INSERT_ORDER | CMD_NO_TEST_IF_IN_NETWORK)))

   285

			break;

   286

	}

   287

}

   288

   289

static void AiHandleReplaceTrain(Player *p)

   290

{

   291

	Vehicle *v = p->ai.cur_veh;

   292

	BackuppedOrders orderbak[1];

   293

	EngineID veh;

   294

   295

	// wait until the vehicle reaches the depot.

   296

	if (!IsTileDepotType(v->tile, TRANSPORT_RAIL) || v->u.rail.track != 0x80 || !(v->vehstatus&VS_STOPPED)) {

   297

		AiHandleGotoDepot(p, CMD_TRAIN_GOTO_DEPOT);

   298

		return;

   299

	}

   300

   301

	veh = AiChooseTrainToReplaceWith(p, v);

   302

	if (veh != INVALID_ENGINE) {

   303

		TileIndex tile;

   304

   305

		BackupVehicleOrders(v, orderbak);

   306

		tile = v->tile;

   307

   308

		if (!CmdFailed(DoCommandByTile(0, v->index, 2, DC_EXEC, CMD_SELL_RAIL_WAGON)) &&

   309

			  !CmdFailed(DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE)) ) {

   310

			VehicleID veh = _new_train_id;

   311

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   312

			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_TRAIN);

   313

   314

			DoCommandByTile(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_TRAIN_SERVICE_INT);

   315

		}

   316

	}

   317

}

   318

   319

static void AiHandleReplaceRoadVeh(Player *p)

   320

{

   321

	Vehicle *v = p->ai.cur_veh;

   322

	BackuppedOrders orderbak[1];

   323

	EngineID veh;

   324

   325

	if (!IsTileDepotType(v->tile, TRANSPORT_ROAD) || v->u.road.state != 254 || !(v->vehstatus&VS_STOPPED)) {

   326

		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);

   327

		return;

   328

	}

   329

   330

	veh = AiChooseRoadVehToReplaceWith(p, v);

   331

	if (veh != INVALID_ENGINE) {

   332

		TileIndex tile;

   333

   334

		BackupVehicleOrders(v, orderbak);

   335

		tile = v->tile;

   336

   337

		if (!CmdFailed(DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH)) &&

   338

			  !CmdFailed(DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH)) ) {

   339

			VehicleID veh = _new_roadveh_id;

   340

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   341

			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_ROADVEH);

   342

   343

			DoCommandByTile(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_TRAIN_SERVICE_INT);

   344

		}

   345

	}

   346

}

   347

   348

static void AiHandleReplaceAircraft(Player *p)

   349

{

   350

	Vehicle *v = p->ai.cur_veh;

   351

	BackuppedOrders orderbak[1];

   352

	EngineID veh;

   353

   354

	if (!IsAircraftHangarTile(v->tile) && !(v->vehstatus&VS_STOPPED)) {

   355

		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);

   356

		return;

   357

	}

   358

   359

	veh = AiChooseAircraftToReplaceWith(p, v);

   360

	if (veh != INVALID_ENGINE) {

   361

		TileIndex tile;

   362

   363

		BackupVehicleOrders(v, orderbak);

   364

		tile = v->tile;

   365

   366

		if (!CmdFailed(DoCommandByTile(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT)) &&

   367

			  !CmdFailed(DoCommandByTile(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT)) ) {

   368

			VehicleID veh = _new_aircraft_id;

   369

			AiRestoreVehicleOrders(GetVehicle(veh), orderbak);

   370

			DoCommandByTile(0, veh, 0, DC_EXEC, CMD_START_STOP_AIRCRAFT);

   371

   372

			DoCommandByTile(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_TRAIN_SERVICE_INT);

   373

		}

   374

	}

   375

}

   376

   377

static void AiHandleReplaceShip(Player *p)

   378

{

   379

	error("!AiHandleReplaceShip");

   380

}

   381

   382

typedef EngineID CheckReplaceProc(Player* p, Vehicle* v);

   383

   384

static CheckReplaceProc * const _veh_check_replace_proc[] = {

   385

	AiChooseTrainToReplaceWith,

   386

	AiChooseRoadVehToReplaceWith,

   387

	AiChooseShipToReplaceWith,

   388

	AiChooseAircraftToReplaceWith,

   389

};

   390

   391

typedef void DoReplaceProc(Player *p);

   392

static DoReplaceProc * const _veh_do_replace_proc[] = {

   393

	AiHandleReplaceTrain,

   394

	AiHandleReplaceRoadVeh,

   395

	AiHandleReplaceShip,

   396

	AiHandleReplaceAircraft

   397

};

   398

   399

static void AiStateCheckReplaceVehicle(Player *p)

   400

{

   401

	Vehicle *v = p->ai.cur_veh;

   402

   403

	if (v->type == 0 ||

   404

			v->owner != _current_player ||

   405

			v->type > VEH_Ship ||

   406

			_veh_check_replace_proc[v->type - VEH_Train](p, v) == INVALID_ENGINE) {

   407

		p->ai.state = AIS_VEH_LOOP;

   408

	} else {

   409

		p->ai.state_counter = 0;

   410

		p->ai.state = AIS_VEH_DO_REPLACE_VEHICLE;

   411

	}

   412

}

   413

   414

static void AiStateDoReplaceVehicle(Player *p)

   415

{

   416

	Vehicle *v = p->ai.cur_veh;

   417

	p->ai.state = AIS_VEH_LOOP;

   418

	// vehicle is not owned by the player anymore, something went very wrong.

   419

	if (v->type == 0 || v->owner != _current_player)

   420

		return;

   421

	_veh_do_replace_proc[v->type - VEH_Train](p);

   422

}

   423

   424

typedef struct FoundRoute {

   425

	int distance;

   426

	byte cargo;

   427

	void *from;

   428

	void *to;

   429

} FoundRoute;

   430

   431

static Town *AiFindRandomTown(void)

   432

{

   433

	Town *t = GetTown(RandomRange(_total_towns));

   434

	return (t->xy != 0) ? t : NULL;

   435

}

   436

   437

static Industry *AiFindRandomIndustry(void)

   438

{

   439

	Industry *i = GetIndustry(RandomRange(_total_industries));

   440

	return (i->xy != 0) ? i : NULL;

   441

}

   442

   443

static void AiFindSubsidyIndustryRoute(FoundRoute *fr)

   444

{

   445

	uint i;

   446

	byte cargo;

   447

	Subsidy *s;

   448

	Industry *from, *to_ind;

   449

	Town *to_tow;

   450

	TileIndex to_xy;

   451

   452

	// initially error

   453

	fr->distance = -1;

   454

   455

	// Randomize subsidy index..

   456

	i = RandomRange(lengthof(_subsidies) * 3);

   457

	if (i >= lengthof(_subsidies))

   458

		return;

   459

   460

	s = &_subsidies[i];

   461

   462

	// Don't want passengers or mail

   463

	cargo = s->cargo_type;

   464

	if (cargo == 0xFF || cargo == CT_PASSENGERS || cargo == CT_MAIL || s->age > 7)

   465

		return;

   466

	fr->cargo = cargo;

   467

   468

	fr->from = from = GetIndustry(s->from);

   469

   470

	if (cargo == CT_GOODS || cargo == CT_FOOD) {

   471

		to_tow = GetTown(s->to);

   472

		if (to_tow->population < (uint32)(cargo == CT_FOOD ? 200 : 900))

   473

			return; // error

   474

		fr->to = to_tow;

   475

		to_xy = to_tow->xy;

   476

	} else {

   477

		to_ind = GetIndustry(s->to);

   478

		fr->to = to_ind;

   479

		to_xy = to_ind->xy;

   480

	}

   481

   482

	fr->distance = DistanceManhattan(from->xy, to_xy);

   483

}

   484

   485

static void AiFindSubsidyPassengerRoute(FoundRoute *fr)

   486

{

   487

	uint i;

   488

	Subsidy *s;

   489

	Town *from,*to;

   490

   491

	// initially error

   492

	fr->distance = -1;

   493

   494

	// Randomize subsidy index..

   495

	i = RandomRange(lengthof(_subsidies) * 3);

   496

	if (i >= lengthof(_subsidies))

   497

		return;

   498

   499

	s = &_subsidies[i];

   500

   501

	// Only want passengers

   502

	if (s->cargo_type != CT_PASSENGERS || s->age > 7)

   503

		return;

   504

	fr->cargo = s->cargo_type;

   505

   506

	fr->from = from = GetTown(s->from);

   507

	fr->to = to = GetTown(s->to);

   508

   509

	// They must be big enough

   510

	if (from->population < 400 || to->population < 400)