1

/* $Id$ */

     2

     3

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

     4

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

     5

#include "../../aircraft.h"

     6

#include "../../bridge_map.h"

     7

#include "../../tile_cmd.h"

     8

#include "../../landscape.h"

     9

#include "../../rail_map.h"

    10

#include "../../road_map.h"

    11

#include "../../roadveh.h"

    12

#include "../../station_map.h"

    13

#include "../../tunnel_map.h"

    14

#include "../../command_func.h"

    15

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

    16

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

    17

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

    18

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

    19

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

    20

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

    21

#include "../../bridge.h"

    22

#include "../../date_func.h"

    23

#include "../../tunnelbridge_map.h"

    24

#include "../../window_func.h"

    25

#include "../../vehicle_func.h"

    26

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

    27

#include "../../saveload.h"

    28

#include "../../player_func.h"

    29

#include "../../player_base.h"

    30

#include "../../settings_type.h"

    31

#include "default.h"

    32

#include "../../tunnelbridge.h"

    33

#include "../../order_func.h"

    34

    35

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

    36

    37

// remove some day perhaps?

    38

static uint _ai_service_interval;

    39

PlayerAI _players_ai[MAX_PLAYERS];

    40

    41

typedef void AiStateAction(Player *p);

    42

    43

enum {

    44

	AIS_0                            =  0,

    45

	AIS_1                            =  1,

    46

	AIS_VEH_LOOP                     =  2,

    47

	AIS_VEH_CHECK_REPLACE_VEHICLE    =  3,

    48

	AIS_VEH_DO_REPLACE_VEHICLE       =  4,

    49

	AIS_WANT_NEW_ROUTE               =  5,

    50

	AIS_BUILD_DEFAULT_RAIL_BLOCKS    =  6,

    51

	AIS_BUILD_RAIL                   =  7,

    52

	AIS_BUILD_RAIL_VEH               =  8,

    53

	AIS_DELETE_RAIL_BLOCKS           =  9,

    54

	AIS_BUILD_DEFAULT_ROAD_BLOCKS    = 10,

    55

	AIS_BUILD_ROAD                   = 11,

    56

	AIS_BUILD_ROAD_VEHICLES          = 12,

    57

	AIS_DELETE_ROAD_BLOCKS           = 13,

    58

	AIS_AIRPORT_STUFF                = 14,

    59

	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,

    60

	AIS_BUILD_AIRCRAFT_VEHICLES      = 16,

    61

	AIS_CHECK_SHIP_STUFF             = 17,

    62

	AIS_BUILD_DEFAULT_SHIP_BLOCKS    = 18,

    63

	AIS_DO_SHIP_STUFF                = 19,

    64

	AIS_SELL_VEHICLE                 = 20,

    65

	AIS_REMOVE_STATION               = 21,

    66

	AIS_REMOVE_TRACK                 = 22,

    67

	AIS_REMOVE_SINGLE_RAIL_TILE      = 23

    68

};

    69

    70

    71

static inline TrackBits GetRailTrackStatus(TileIndex tile)

    72

{

    73

	return TrackStatusToTrackBits(GetTileTrackStatus(tile, TRANSPORT_RAIL, 0));

    74

}

    75

    76

    77

static void AiCase0(Player *p)

    78

{

    79

	_players_ai[p->index].state = AIS_REMOVE_TRACK;

    80

	_players_ai[p->index].state_counter = 0;

    81

}

    82

    83

static void AiCase1(Player *p)

    84

{

    85

	_players_ai[p->index].cur_veh = NULL;

    86

	_players_ai[p->index].state = AIS_VEH_LOOP;

    87

}

    88

    89

static void AiStateVehLoop(Player *p)

    90

{

    91

	Vehicle *v;

    92

	uint index;

    93

    94

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

    95

    96

	FOR_ALL_VEHICLES_FROM(v, index) {

    97

		if (v->owner != _current_player) continue;

    98

    99

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

   100

				v->type == VEH_ROAD ||

   101

				(v->type == VEH_AIRCRAFT && IsNormalAircraft(v)) ||

   102

				v->type == VEH_SHIP) {

   103

			/* replace engine? */

   104

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

   105

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

   106

				_players_ai[p->index].state = AIS_VEH_CHECK_REPLACE_VEHICLE;

   107

				_players_ai[p->index].cur_veh = v;

   108

				return;

   109

			}

   110

   111

			/* not profitable? */

   112

			if (v->age >= 730 &&

   113

					v->profit_last_year < _price.station_value * 5 * 256 &&

   114

					v->profit_this_year < _price.station_value * 5 * 256) {

   115

				_players_ai[p->index].state_counter = 0;

   116

				_players_ai[p->index].state = AIS_SELL_VEHICLE;

   117

				_players_ai[p->index].cur_veh = v;

   118

				return;

   119

			}

   120

   121

			/* not reliable? */

   122

			if (v->age >= v->max_age || (

   123

						v->age != 0 &&

   124

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

   125

					)) {

   126

				_players_ai[p->index].state = AIS_VEH_CHECK_REPLACE_VEHICLE;

   127

				_players_ai[p->index].cur_veh = v;

   128

				return;

   129

			}

   130

		}

   131

	}

   132

   133

	_players_ai[p->index].state = AIS_WANT_NEW_ROUTE;

   134

	_players_ai[p->index].state_counter = 0;

   135

}

   136

   137

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

   138

{

   139

	EngineID best_veh_index = INVALID_ENGINE;

   140

	byte best_veh_score = 0;

   141

	EngineID i;

   142

   143

	FOR_ALL_ENGINEIDS_OF_TYPE(i, VEH_TRAIN) {

   144

		const RailVehicleInfo *rvi = RailVehInfo(i);

   145

		const Engine* e = GetEngine(i);

   146

   147

		if (!IsCompatibleRail(rvi->railtype, railtype) ||

   148

				rvi->railveh_type == RAILVEH_WAGON ||

   149

				(rvi->railveh_type == RAILVEH_MULTIHEAD && flag & 1) ||

   150

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

   151

				e->reliability < 0x8A3D) {

   152

			continue;

   153

		}

   154

   155

		/* Don't choose an engine designated for passenger use for freight. */

   156

		if (rvi->ai_passenger_only != 0 && flag == 1) continue;

   157

   158

		CommandCost ret = DoCommand(tile, i, 0, 0, CMD_BUILD_RAIL_VEHICLE);

   159

		if (CmdSucceeded(ret) && ret.GetCost() <= money && rvi->ai_rank >= best_veh_score) {

   160

			best_veh_score = rvi->ai_rank;

   161

			best_veh_index = i;

   162

		}

   163

	}

   164

   165

	return best_veh_index;

   166

}

   167

   168

static EngineID AiChooseRoadVehToBuild(CargoID cargo, Money money, TileIndex tile)

   169

{

   170

	EngineID best_veh_index = INVALID_ENGINE;

   171

	int32 best_veh_rating = 0;

   172

	EngineID i;

   173

   174

	FOR_ALL_ENGINEIDS_OF_TYPE(i, VEH_ROAD) {

   175

		const RoadVehicleInfo *rvi = RoadVehInfo(i);

   176

		const Engine* e = GetEngine(i);

   177

   178

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

   179

			continue;

   180

		}

   181

   182

		/* Skip vehicles which can't take our cargo type */

   183

		if (rvi->cargo_type != cargo && !CanRefitTo(i, cargo)) continue;

   184

   185

		/* Rate and compare the engine by speed & capacity */

   186

		int rating = rvi->max_speed * rvi->capacity;

   187

		if (rating <= best_veh_rating) continue;

   188

   189

		CommandCost ret = DoCommand(tile, i, 0, 0, CMD_BUILD_ROAD_VEH);

   190

		if (CmdFailed(ret)) continue;

   191

   192

		/* Add the cost of refitting */

   193

		if (rvi->cargo_type != cargo) ret.AddCost(GetRefitCost(i));

   194

		if (ret.GetCost() > money) continue;

   195

   196

		best_veh_rating = rating;

   197

		best_veh_index = i;

   198

	}

   199

   200

	return best_veh_index;

   201

}

   202

   203

/**

   204

 * Choose aircraft to build.

   205

 * @param money current AI money

   206

 * @param forbidden forbidden flags - AIR_HELI = 0 (always allowed), AIR_CTOL = 1 (bit 0), AIR_FAST = 2 (bit 1)

   207

 * @return EngineID of aircraft to build

   208

 */

   209

static EngineID AiChooseAircraftToBuild(Money money, byte forbidden)

   210

{

   211

	EngineID best_veh_index = INVALID_ENGINE;

   212

	Money best_veh_cost = 0;

   213

	EngineID i;

   214

   215

	FOR_ALL_ENGINEIDS_OF_TYPE(i, VEH_AIRCRAFT) {

   216

		const Engine* e = GetEngine(i);

   217

   218

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

   219

			continue;

   220

		}

   221

   222

		if ((AircraftVehInfo(i)->subtype & forbidden) != 0) continue;

   223

   224

		CommandCost ret = DoCommand(0, i, 0, DC_QUERY_COST, CMD_BUILD_AIRCRAFT);

   225

		if (CmdSucceeded(ret) && ret.GetCost() <= money && ret.GetCost() >= best_veh_cost) {

   226

			best_veh_cost = ret.GetCost();

   227

			best_veh_index = i;

   228

		}

   229

	}

   230

   231

	return best_veh_index;

   232

}

   233

   234

static Money AiGetBasePrice(const Player* p)

   235

{

   236

	Money base = _price.station_value;

   237

   238

	// adjust base price when more expensive vehicles are available

   239

	switch (_players_ai[p->index].railtype_to_use) {

   240

		default: NOT_REACHED();

   241

		case RAILTYPE_RAIL:     break;

   242

		case RAILTYPE_ELECTRIC: break;

   243

		case RAILTYPE_MONO:     base = (base * 3) >> 1; break;

   244

		case RAILTYPE_MAGLEV:   base *= 2; break;

   245

	}

   246

   247

	return base;

   248

}

   249

   250

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

   251

{

   252

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

   253

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

   254

}

   255

   256

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

   257

{

   258

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

   259

   260

	/* determine forbidden aircraft bits */

   261

	byte forbidden = 0;

   262

	const Order *o;

   263

   264

	FOR_VEHICLE_ORDERS(v, o) {

   265

		if (!o->IsValid()) continue;

   268

		if (!(st->facilities & FACIL_AIRPORT)) continue;

   269

   270

		AirportFTAClass::Flags flags = st->Airport()->flags;

   271

		if (!(flags & AirportFTAClass::AIRPLANES)) forbidden |= AIR_CTOL | AIR_FAST; // no planes for heliports / oil rigs

   272

		if (flags & AirportFTAClass::SHORT_STRIP) forbidden |= AIR_FAST; // no fast planes for small airports

   273

	}

   274

   275

	return AiChooseAircraftToBuild(

   276

		avail_money, forbidden

   277

	);

   278

}

   279

   280

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

   281

{

   282

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

   283

	const Vehicle* u = v;

   284

	int num = 0;

   285

   286

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

   287

		u = u->Next();

   288

	}

   289

   290

	// XXX: check if a wagon

   291

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

   292

}

   293

   294

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

   295

{

   296

	/* Ships are not implemented in this (broken) AI */

   297

	return INVALID_ENGINE;

   298

}

   299

   300

static void AiHandleGotoDepot(Player *p, int cmd)

   301

{

   302

	if (!_players_ai[p->index].cur_veh->current_order.IsType(OT_GOTO_DEPOT))

   303

		DoCommand(0, _players_ai[p->index].cur_veh->index, 0, DC_EXEC, cmd);

   304

   305

	if (++_players_ai[p->index].state_counter <= 1387) {

   306

		_players_ai[p->index].state = AIS_VEH_DO_REPLACE_VEHICLE;

   307

		return;

   308

	}

   309

   310

	if (_players_ai[p->index].cur_veh->current_order.IsType(OT_GOTO_DEPOT)) {

   311

		_players_ai[p->index].cur_veh->current_order.MakeDummy();

   312

		InvalidateWindow(WC_VEHICLE_VIEW, _players_ai[p->index].cur_veh->index);

   313

	}

   314

}

   315

   316

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

   317

{

   318

	if (bak->order == NULL) return;

   319

   320

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

   321

		if (!DoCommandP(0, v->index + (i << 16), bak->order[i].Pack(), NULL, CMD_INSERT_ORDER | CMD_NO_TEST_IF_IN_NETWORK))

   322

			break;

   323

	}

   324

}

   325

   326

static void AiHandleReplaceTrain(Player *p)

   327

{

   328

	const Vehicle* v = _players_ai[p->index].cur_veh;

   329

	BackuppedOrders orderbak;

   330

	EngineID veh;

   331

   332

	// wait until the vehicle reaches the depot.

   333

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

   334

		AiHandleGotoDepot(p, CMD_SEND_TRAIN_TO_DEPOT);

   335

		return;

   336

	}

   337

   338

	veh = AiChooseTrainToReplaceWith(p, v);

   339

	if (veh != INVALID_ENGINE) {

   340

		TileIndex tile;

   341

   342

		BackupVehicleOrders(v, &orderbak);

   343

		tile = v->tile;

   344

   345

		if (CmdSucceeded(DoCommand(0, v->index, 2, DC_EXEC, CMD_SELL_RAIL_WAGON)) &&

   346

				CmdSucceeded(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_RAIL_VEHICLE))) {

   347

			VehicleID veh = _new_vehicle_id;

   348

			AiRestoreVehicleOrders(GetVehicle(veh), &orderbak);

   349

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

   350

   351

			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);

   352

		}

   353

	}

   354

}

   355

   356

static void AiHandleReplaceRoadVeh(Player *p)

   357

{

   358

	const Vehicle* v = _players_ai[p->index].cur_veh;

   359

	BackuppedOrders orderbak;

   360

	EngineID veh;

   361

   362

	if (!v->IsStoppedInDepot()) {

   363

		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);

   364

		return;

   365

	}

   366

   367

	veh = AiChooseRoadVehToReplaceWith(p, v);

   368

	if (veh != INVALID_ENGINE) {

   369

		TileIndex tile;

   370

   371

		BackupVehicleOrders(v, &orderbak);

   372

		tile = v->tile;

   373

   374

		if (CmdSucceeded(DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_ROAD_VEH)) &&

   375

				CmdSucceeded(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_ROAD_VEH))) {

   376

			VehicleID veh = _new_vehicle_id;

   377

   378

			AiRestoreVehicleOrders(GetVehicle(veh), &orderbak);

   379

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

   380

			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);

   381

		}

   382

	}

   383

}

   384

   385

static void AiHandleReplaceAircraft(Player *p)

   386

{

   387

	const Vehicle* v = _players_ai[p->index].cur_veh;

   388

	BackuppedOrders orderbak;

   389

	EngineID veh;

   390

   391

	if (!v->IsStoppedInDepot()) {

   392

		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);

   393

		return;

   394

	}

   395

   396

	veh = AiChooseAircraftToReplaceWith(p, v);

   397

	if (veh != INVALID_ENGINE) {

   398

		TileIndex tile;

   399

   400

		BackupVehicleOrders(v, &orderbak);

   401

		tile = v->tile;

   402

   403

		if (CmdSucceeded(DoCommand(0, v->index, 0, DC_EXEC, CMD_SELL_AIRCRAFT)) &&

   404

				CmdSucceeded(DoCommand(tile, veh, 0, DC_EXEC, CMD_BUILD_AIRCRAFT))) {

   405

			VehicleID veh = _new_vehicle_id;

   406

			AiRestoreVehicleOrders(GetVehicle(veh), &orderbak);

   407

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

   408

   409

			DoCommand(0, veh, _ai_service_interval, DC_EXEC, CMD_CHANGE_SERVICE_INT);

   410

		}

   411

	}

   412

}

   413

   414

static void AiHandleReplaceShip(Player *p)

   415

{

   416

	/* Ships are not implemented in this (broken) AI */

   417

}

   418

   419

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

   420

   421

static CheckReplaceProc* const _veh_check_replace_proc[] = {

   422

	AiChooseTrainToReplaceWith,

   423

	AiChooseRoadVehToReplaceWith,

   424

	AiChooseShipToReplaceWith,

   425

	AiChooseAircraftToReplaceWith,

   426

};

   427

   428

typedef void DoReplaceProc(Player *p);

   429

static DoReplaceProc* const _veh_do_replace_proc[] = {

   430

	AiHandleReplaceTrain,

   431

	AiHandleReplaceRoadVeh,

   432

	AiHandleReplaceShip,

   433

	AiHandleReplaceAircraft

   434

};

   435

   436

static void AiStateCheckReplaceVehicle(Player *p)

   437

{

   438

	const Vehicle* v = _players_ai[p->index].cur_veh;

   439

   440

	if (!v->IsValid() ||

   441

			v->owner != _current_player ||

   442

			v->type > VEH_SHIP ||

   443

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

   444

		_players_ai[p->index].state = AIS_VEH_LOOP;

   445

	} else {

   446

		_players_ai[p->index].state_counter = 0;

   447

		_players_ai[p->index].state = AIS_VEH_DO_REPLACE_VEHICLE;

   448

	}

   449

}

   450

   451

static void AiStateDoReplaceVehicle(Player *p)

   452

{

   453

	const Vehicle* v = _players_ai[p->index].cur_veh;

   454

   455

	_players_ai[p->index].state = AIS_VEH_LOOP;

   456

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

   457

	if (!v->IsValid() || v->owner != _current_player) return;

   458

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

   459

}

   460

   461

struct FoundRoute {

   462

	int distance;

   463

	CargoID cargo;

   464

	void *from;

   465

	void *to;

   466

};

   467

   468

static Town *AiFindRandomTown()

   469

{

   470

	return GetRandomTown();

   471

}

   472

   473

static Industry *AiFindRandomIndustry()

   474

{

   475

	int num = RandomRange(GetMaxIndustryIndex());

   476

	if (IsValidIndustryID(num)) return GetIndustry(num);

   477

   478

	return NULL;

   479

}

   480

   481

static void AiFindSubsidyIndustryRoute(FoundRoute *fr)

   482

{

   483

	uint i;

   484

	CargoID cargo;

   485

	const Subsidy* s;

   486

	Industry* from;

   487

	TileIndex to_xy;

   488

   489

	// initially error

   490

	fr->distance = -1;

   491