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 "../../engine.h"

    15

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

    16

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

    17

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

    18

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

    19

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

    20

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

    21

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

    22

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

    23

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

    24

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

    25

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

    26

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

    27

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

    28

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

    29

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

    30

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

    31

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

    32

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

    33

#include "default.h"

    34

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

    35

    36

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

    37

    38

// remove some day perhaps?

    39

static uint _ai_service_interval;

    40

PlayerAI _players_ai[MAX_PLAYERS];

    41

    42

typedef void AiStateAction(Player *p);

    43

    44

enum {

    45

	AIS_0                            =  0,

    46

	AIS_1                            =  1,

    47

	AIS_VEH_LOOP                     =  2,

    48

	AIS_VEH_CHECK_REPLACE_VEHICLE    =  3,

    49

	AIS_VEH_DO_REPLACE_VEHICLE       =  4,

    50

	AIS_WANT_NEW_ROUTE               =  5,

    51

	AIS_BUILD_DEFAULT_RAIL_BLOCKS    =  6,

    52

	AIS_BUILD_RAIL                   =  7,

    53

	AIS_BUILD_RAIL_VEH               =  8,

    54

	AIS_DELETE_RAIL_BLOCKS           =  9,

    55

	AIS_BUILD_DEFAULT_ROAD_BLOCKS    = 10,

    56

	AIS_BUILD_ROAD                   = 11,

    57

	AIS_BUILD_ROAD_VEHICLES          = 12,

    58

	AIS_DELETE_ROAD_BLOCKS           = 13,

    59

	AIS_AIRPORT_STUFF                = 14,

    60

	AIS_BUILD_DEFAULT_AIRPORT_BLOCKS = 15,

    61

	AIS_BUILD_AIRCRAFT_VEHICLES      = 16,

    62

	AIS_CHECK_SHIP_STUFF             = 17,

    63

	AIS_BUILD_DEFAULT_SHIP_BLOCKS    = 18,

    64

	AIS_DO_SHIP_STUFF                = 19,

    65

	AIS_SELL_VEHICLE                 = 20,

    66

	AIS_REMOVE_STATION               = 21,

    67

	AIS_REMOVE_TRACK                 = 22,

    68

	AIS_REMOVE_SINGLE_RAIL_TILE      = 23

    69

};

    70

    71

    72

static TrackBits GetRailTrackStatus(TileIndex tile)

    73

{

    74

	uint32 r = GetTileTrackStatus(tile, TRANSPORT_RAIL, 0);

    75

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

    76

}

    77

    78

    79

static void AiCase0(Player *p)

    80

{

    81

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

    82

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

    83

}

    84

    85

static void AiCase1(Player *p)

    86

{

    87

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

    88

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

    89

}

    90

    91

static void AiStateVehLoop(Player *p)

    92

{

    93

	Vehicle *v;

    94

	uint index;

    95

    96

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

    97

    98

	FOR_ALL_VEHICLES_FROM(v, index) {

    99

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

   100

   101

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

   102

				v->type == VEH_ROAD ||

   103

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

   104

				v->type == VEH_SHIP) {

   105

			/* replace engine? */

   106

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

   107

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

   108

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

   109

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

   110

				return;

   111

			}

   112

   113

			/* not profitable? */

   114

			if (v->age >= 730 &&

   115

					v->profit_last_year >> 8 < _price.station_value * 5 &&

   116

					v->profit_this_year >> 8 < _price.station_value * 5) {

   117

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

   118

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

   119

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

   120

				return;

   121

			}

   122

   123

			/* not reliable? */

   124

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

   125

						v->age != 0 &&

   126

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

   127

					)) {

   128

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

   129

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

   130

				return;

   131

			}

   132

		}

   133

	}

   134

   135

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

   136

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

   137

}

   138

   139

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

   140

{

   141

	EngineID best_veh_index = INVALID_ENGINE;

   142

	byte best_veh_score = 0;

   143

	EngineID i;

   144

   145

	FOR_ALL_ENGINEIDS_OF_TYPE(i, VEH_TRAIN) {

   146

		const RailVehicleInfo *rvi = RailVehInfo(i);

   147

		const Engine* e = GetEngine(i);

   148

   149

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

   150

				rvi->railveh_type == RAILVEH_WAGON ||

   151

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

   152

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

   153

				e->reliability < 0x8A3D) {

   154

			continue;

   155

		}

   156

   157

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

   158

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

   159

   160

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

   161

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

   162

			best_veh_score = rvi->ai_rank;

   163

			best_veh_index = i;

   164

		}

   165

	}

   166

   167

	return best_veh_index;

   168

}

   169

   170

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

   171

{

   172

	EngineID best_veh_index = INVALID_ENGINE;

   173

	int32 best_veh_rating = 0;

   174

	EngineID i;

   175

   176

	FOR_ALL_ENGINEIDS_OF_TYPE(i, VEH_ROAD) {

   177

		const RoadVehicleInfo *rvi = RoadVehInfo(i);

   178

		const Engine* e = GetEngine(i);

   179

   180

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

   181

			continue;

   182

		}

   183

   184

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

   185

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

   186

   187

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

   188

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

   189

		if (rating <= best_veh_rating) continue;

   190

   191

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

   192

		if (CmdFailed(ret)) continue;

   193

   194

		/* Add the cost of refitting */

   195

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

   196

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

   197

   198

		best_veh_rating = rating;

   199

		best_veh_index = i;

   200

	}

   201

   202

	return best_veh_index;

   203

}

   204

   205

/**

   206

 * Choose aircraft to build.

   207

 * @param money current AI money

   208

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

   209

 * @return EngineID of aircraft to build

   210

 */

   211

static EngineID AiChooseAircraftToBuild(Money money, byte forbidden)

   212

{

   213

	EngineID best_veh_index = INVALID_ENGINE;

   214

	Money best_veh_cost = 0;

   215

	EngineID i;

   216

   217

	FOR_ALL_ENGINEIDS_OF_TYPE(i, VEH_AIRCRAFT) {

   218

		const Engine* e = GetEngine(i);

   219

   220

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

   221

			continue;

   222

		}

   223

   224

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

   225

   226

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

   227

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

   228

			best_veh_cost = ret.GetCost();

   229

			best_veh_index = i;

   230

		}

   231

	}

   232

   233

	return best_veh_index;

   234

}

   235

   236

static Money AiGetBasePrice(const Player* p)

   237

{

   238

	Money base = _price.station_value;

   239

   240

	// adjust base price when more expensive vehicles are available

   241

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

   242

		default: NOT_REACHED();

   243

		case RAILTYPE_RAIL:     break;

   244

		case RAILTYPE_ELECTRIC: break;

   245

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

   246

		case RAILTYPE_MAGLEV:   base *= 2; break;

   247

	}

   248

   249

	return base;

   250

}

   251

   252

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

   253

{

   254

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

   255

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

   256

}

   257

   258

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

   259

{

   260

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

   261

   262

	/* determine forbidden aircraft bits */

   263

	byte forbidden = 0;

   264

	const Order *o;

   265

   266

	FOR_VEHICLE_ORDERS(v, o) {

   267

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

   268

		if (!IsValidStationID(o->dest)) continue;

   269

		const Station *st = GetStation(o->dest);

   270

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

   271

   272

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

   273

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

   274

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

   275

	}

   276

   277

	return AiChooseAircraftToBuild(

   278

		avail_money, forbidden

   279

	);

   280

}

   281

   282

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

   283

{

   284

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

   285

	const Vehicle* u = v;

   286

	int num = 0;

   287

   288

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

   289

		u = u->Next();

   290

	}

   291

   292

	// XXX: check if a wagon

   293

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

   294

}

   295

   296

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

   297

{

   298

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

   299

	return INVALID_ENGINE;

   300

}

   301

   302

static void AiHandleGotoDepot(Player *p, int cmd)

   303

{

   304

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

   305

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

   306

   307

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

   308

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

   309

		return;

   310

	}

   311

   312

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

   313

		_players_ai[p->index].cur_veh->current_order.type = OT_DUMMY;

   314

		_players_ai[p->index].cur_veh->current_order.flags = 0;

   315

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

   316

	}

   317

}

   318

   319

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

   320

{

   321

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

   322

   323

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

   324

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

   325

			break;

   326

	}

   327

}

   328

   329

static void AiHandleReplaceTrain(Player *p)

   330

{

   331

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

   332

	BackuppedOrders orderbak;

   333

	EngineID veh;

   334

   335

	// wait until the vehicle reaches the depot.

   336

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

   337

		AiHandleGotoDepot(p, CMD_SEND_TRAIN_TO_DEPOT);

   338

		return;

   339

	}

   340

   341

	veh = AiChooseTrainToReplaceWith(p, v);

   342

	if (veh != INVALID_ENGINE) {

   343

		TileIndex tile;

   344

   345

		BackupVehicleOrders(v, &orderbak);

   346

		tile = v->tile;

   347

   348

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

   349

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

   350

			VehicleID veh = _new_vehicle_id;

   351

			AiRestoreVehicleOrders(GetVehicle(veh), &orderbak);

   352

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

   353

   354

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

   355

		}

   356

	}

   357

}

   358

   359

static void AiHandleReplaceRoadVeh(Player *p)

   360

{

   361

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

   362

	BackuppedOrders orderbak;

   363

	EngineID veh;

   364

   365

	if (!v->IsStoppedInDepot()) {

   366

		AiHandleGotoDepot(p, CMD_SEND_ROADVEH_TO_DEPOT);

   367

		return;

   368

	}

   369

   370

	veh = AiChooseRoadVehToReplaceWith(p, v);

   371

	if (veh != INVALID_ENGINE) {

   372

		TileIndex tile;

   373

   374

		BackupVehicleOrders(v, &orderbak);

   375

		tile = v->tile;

   376

   377

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

   378

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

   379

			VehicleID veh = _new_vehicle_id;

   380

   381

			AiRestoreVehicleOrders(GetVehicle(veh), &orderbak);

   382

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

   383

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

   384

		}

   385

	}

   386

}

   387

   388

static void AiHandleReplaceAircraft(Player *p)

   389

{

   390

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

   391

	BackuppedOrders orderbak;

   392

	EngineID veh;

   393

   394

	if (!v->IsStoppedInDepot()) {

   395

		AiHandleGotoDepot(p, CMD_SEND_AIRCRAFT_TO_HANGAR);

   396

		return;

   397

	}

   398

   399

	veh = AiChooseAircraftToReplaceWith(p, v);

   400

	if (veh != INVALID_ENGINE) {

   401

		TileIndex tile;

   402

   403

		BackupVehicleOrders(v, &orderbak);

   404

		tile = v->tile;

   405

   406

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

   407

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

   408

			VehicleID veh = _new_vehicle_id;

   409

			AiRestoreVehicleOrders(GetVehicle(veh), &orderbak);

   410

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

   411

   412

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

   413

		}

   414

	}

   415

}

   416

   417

static void AiHandleReplaceShip(Player *p)

   418

{

   419

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

   420

}

   421

   422

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

   423

   424

static CheckReplaceProc* const _veh_check_replace_proc[] = {

   425

	AiChooseTrainToReplaceWith,

   426

	AiChooseRoadVehToReplaceWith,

   427

	AiChooseShipToReplaceWith,

   428

	AiChooseAircraftToReplaceWith,

   429

};

   430

   431

typedef void DoReplaceProc(Player *p);

   432

static DoReplaceProc* const _veh_do_replace_proc[] = {

   433

	AiHandleReplaceTrain,

   434

	AiHandleReplaceRoadVeh,

   435

	AiHandleReplaceShip,

   436

	AiHandleReplaceAircraft

   437

};

   438

   439

static void AiStateCheckReplaceVehicle(Player *p)

   440

{

   441

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

   442

   443

	if (!v->IsValid() ||

   444

			v->owner != _current_player ||

   445

			v->type > VEH_SHIP ||

   446

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

   447

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

   448

	} else {

   449

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

   450

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

   451

	}

   452

}

   453

   454

static void AiStateDoReplaceVehicle(Player *p)

   455

{

   456

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

   457

   458

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

   459

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

   460

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

   461

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

   462

}

   463

   464

struct FoundRoute {

   465

	int distance;

   466

	CargoID cargo;

   467

	void *from;

   468

	void *to;

   469

};

   470

   471

static Town *AiFindRandomTown()

   472

{

   473

	return GetRandomTown();

   474

}

   475

   476

static Industry *AiFindRandomIndustry()

   477

{

   478

	int num = RandomRange(GetMaxIndustryIndex());

   479

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

   480

   481

	return NULL;

   482

}

   483

   484

static void AiFindSubsidyIndustryRoute(FoundRoute *fr)

   485

{

   486

	uint i;

   487

	CargoID cargo;

   488

	const Subsidy* s;

   489

	Industry* from;

   490

	TileIndex to_xy;

   491

   492

	// initially error

   493

	fr->distance = -1;

   494

   495

	// Randomize subsidy index..