/* $Id$ */

#include "stdafx.h"
#include "openttd.h"
#include "clear_map.h"
#include "industry_map.h"
#include "station_map.h"
#include "table/strings.h"
#include "table/sprites.h"
#include "functions.h"
#include "map.h"
#include "tile.h"
#include "viewport.h"
#include "command.h"
#include "industry.h"
#include "town.h"
#include "vehicle.h"
#include "news.h"
#include "saveload.h"
#include "economy.h"
#include "sound.h"
#include "variables.h"
#include "table/industry_land.h"
#include "table/build_industry.h"

enum {
	/* Max industries: 64000 (8 * 8000) */
	INDUSTRY_POOL_BLOCK_SIZE_BITS = 3,       /* In bits, so (1 << 3) == 8 */
	INDUSTRY_POOL_MAX_BLOCKS      = 8000,
};

/**
 * Called if a new block is added to the industry-pool
 */
static void IndustryPoolNewBlock(uint start_item)
{
	Industry *i;

	FOR_ALL_INDUSTRIES_FROM(i, start_item) i->index = start_item++;
}

/* Initialize the industry-pool */
MemoryPool _industry_pool = { "Industry", INDUSTRY_POOL_MAX_BLOCKS, INDUSTRY_POOL_BLOCK_SIZE_BITS, sizeof(Industry), &IndustryPoolNewBlock, NULL, 0, 0, NULL };

static byte _industry_sound_ctr;
static TileIndex _industry_sound_tile;

void ShowIndustryViewWindow(int industry);
void BuildOilRig(TileIndex tile);
void DeleteOilRig(TileIndex tile);

static const IndustryType _industry_close_mode[IT_END] = {
	/* COAL_MINE */          INDUSTRYLIFE_PRODUCTION,
	/* POWER_STATION */      INDUSTRYLIFE_NOT_CLOSABLE,
	/* SAWMILL */            INDUSTRYLIFE_CLOSABLE,
	/* FOREST */             INDUSTRYLIFE_PRODUCTION,
	/* OIL_REFINERY */       INDUSTRYLIFE_CLOSABLE,
	/* OIL_RIG */            INDUSTRYLIFE_PRODUCTION,
	/* FACTORY */            INDUSTRYLIFE_CLOSABLE,
	/* PRINTING_WORKS */     INDUSTRYLIFE_CLOSABLE,
	/* STEEL_MILL */         INDUSTRYLIFE_CLOSABLE,
	/* FARM */               INDUSTRYLIFE_PRODUCTION,
	/* COPPER_MINE */        INDUSTRYLIFE_PRODUCTION,
	/* OIL_WELL */           INDUSTRYLIFE_PRODUCTION,
	/* BANK */               INDUSTRYLIFE_NOT_CLOSABLE,
	/* FOOD_PROCESS */       INDUSTRYLIFE_CLOSABLE,
	/* PAPER_MILL */         INDUSTRYLIFE_CLOSABLE,
	/* GOLD_MINE */          INDUSTRYLIFE_PRODUCTION,
	/* BANK_2,  */           INDUSTRYLIFE_NOT_CLOSABLE,
	/* DIAMOND_MINE */       INDUSTRYLIFE_PRODUCTION,
	/* IRON_MINE */          INDUSTRYLIFE_PRODUCTION,
	/* FRUIT_PLANTATION */   INDUSTRYLIFE_PRODUCTION,
	/* RUBBER_PLANTATION */  INDUSTRYLIFE_PRODUCTION,
	/* WATER_SUPPLY */       INDUSTRYLIFE_PRODUCTION,
	/* WATER_TOWER */        INDUSTRYLIFE_NOT_CLOSABLE,
	/* FACTORY_2 */          INDUSTRYLIFE_CLOSABLE,
	/* FARM_2 */             INDUSTRYLIFE_PRODUCTION,
	/* LUMBER_MILL */        INDUSTRYLIFE_CLOSABLE,
	/* COTTON_CANDY */       INDUSTRYLIFE_PRODUCTION,
	/* CANDY_FACTORY */      INDUSTRYLIFE_CLOSABLE,
	/* BATTERY_FARM */       INDUSTRYLIFE_PRODUCTION,
	/* COLA_WELLS */         INDUSTRYLIFE_PRODUCTION,
	/* TOY_SHOP */           INDUSTRYLIFE_NOT_CLOSABLE,
	/* TOY_FACTORY */        INDUSTRYLIFE_CLOSABLE,
	/* PLASTIC_FOUNTAINS */  INDUSTRYLIFE_PRODUCTION,
	/* FIZZY_DRINK_FACTORY */INDUSTRYLIFE_CLOSABLE,
	/* BUBBLE_GENERATOR */   INDUSTRYLIFE_PRODUCTION,
	/* TOFFEE_QUARRY */      INDUSTRYLIFE_PRODUCTION,
	/* SUGAR_MINE */         INDUSTRYLIFE_PRODUCTION
};

/**
 * Retrieve the type for this industry.  Although it is accessed by a tile,
 * it will return the general type of industry, and not the sprite index
 * as would do GetIndustryGfx.
 * The same information can be accessed by looking at Industry->type
 * @param tile that is queried
 * @pre IsTileType(tile, MP_INDUSTRY)
 * @return general type for this industry, as defined in industry.h
 **/
IndustryType GetIndustryType(TileIndex tile)
{
	IndustryGfx this_type = GetIndustryGfx(tile);
	IndustryType iloop;

	assert(IsTileType(tile, MP_INDUSTRY));

	for (iloop = IT_COAL_MINE; iloop < IT_END; iloop += 1) {
		if (IS_BYTE_INSIDE(this_type, industry_gfx_Solver[iloop].MinGfx,
				industry_gfx_Solver[iloop].MaxGfx+1)) {
			return iloop;
		}
	}

	return IT_INVALID;  //we have not found equivalent, whatever the reason
}

/**
 * Accessor for array _industry_specs.
 * This will ensure at once : proper access and
 * not allowing modifications of it.
 * @param thistype of industry (which is the index in _industry_specs)
 * @pre thistype < IT_END
 **/
const IndustrySpec *GetIndustrySpec(IndustryType thistype)
{
	assert(thistype < IT_END);
	return &_industry_specs[thistype];
}

static void IndustryDrawSugarMine(const TileInfo *ti)
{
	const DrawIndustrySpec1Struct *d;
	uint32 image;

	if (!IsIndustryCompleted(ti->tile)) return;

	d = &_draw_industry_spec1[_m[ti->tile].m3];

	AddChildSpriteScreen(SPR_IT_SUGAR_MINE_SIEVE + d->image_1, d->x, 0);

	image = d->image_2;
	if (image != 0) AddChildSpriteScreen(SPR_IT_SUGAR_MINE_CLOUDS + image - 1, 8, 41);

	image = d->image_3;
	if (image != 0) {
		AddChildSpriteScreen(SPR_IT_SUGAR_MINE_PILE + image - 1,
			_drawtile_proc1_x[image - 1], _drawtile_proc1_y[image - 1]);
	}
}

static void IndustryDrawToffeeQuarry(const TileInfo *ti)
{
	int x = 0;

	if (IsIndustryCompleted(ti->tile)) {
		x = _industry_anim_offs[_m[ti->tile].m3];
		if ( (byte)x == 0xFF)
			x = 0;
	}

	AddChildSpriteScreen(SPR_IT_TOFFEE_QUARRY_SHOVEL, 22 - x, 24 + x);
	AddChildSpriteScreen(SPR_IT_TOFFEE_QUARRY_TOFFEE, 6, 14);
}

static void IndustryDrawBubbleGenerator( const TileInfo *ti)
{
	if (IsIndustryCompleted(ti->tile)) {
		AddChildSpriteScreen(SPR_IT_BUBBLE_GENERATOR_BUBBLE, 5, _industry_anim_offs_2[_m[ti->tile].m3]);
	} else {
		AddChildSpriteScreen(SPR_IT_BUBBLE_GENERATOR_SPRING, 3, 67);
	}
}

static void IndustryDrawToyFactory(const TileInfo *ti)
{
	const DrawIndustrySpec4Struct *d;

	d = &_industry_anim_offs_3[_m[ti->tile].m3];

	if (d->image_1 != 0xFF) {
		AddChildSpriteScreen(SPR_IT_TOY_FACTORY_CLAY, 50 - d->image_1 * 2, 96 + d->image_1);
	}

	if (d->image_2 != 0xFF) {
		AddChildSpriteScreen(SPR_IT_TOY_FACTORY_ROBOT, 16 - d->image_2 * 2, 100 + d->image_2);
	}

	AddChildSpriteScreen(SPR_IT_TOY_FACTORY_STAMP, 7, d->image_3);
	AddChildSpriteScreen(SPR_IT_TOY_FACTORY_STAMP_HOLDER, 0, 42);
}

static void IndustryDrawCoalPlantSparks(const TileInfo *ti)
{
	if (IsIndustryCompleted(ti->tile)) {
		uint image = GB(_m[ti->tile].m1, 2, 5);

		if (image != 0 && image < 7) {
			AddChildSpriteScreen(image + SPR_IT_POWER_PLANT_TRANSFORMERS,
				_coal_plant_sparks_x[image - 1],
				_coal_plant_sparks_y[image - 1]
			);
		}
	}
}

typedef void IndustryDrawTileProc(const TileInfo *ti);
static IndustryDrawTileProc * const _industry_draw_tile_procs[5] = {
	IndustryDrawSugarMine,
	IndustryDrawToffeeQuarry,
	IndustryDrawBubbleGenerator,
	IndustryDrawToyFactory,
	IndustryDrawCoalPlantSparks,
};

static void DrawTile_Industry(TileInfo *ti)
{
	const Industry *ind;
	const DrawBuildingsTileStruct *dits;
	byte z;
	uint32 image, ormod;

	/* Pointer to industry */
	ind = GetIndustryByTile(ti->tile);
	ormod = GENERAL_SPRITE_COLOR(ind->color_map);

	/* Retrieve pointer to the draw industry tile struct */
	dits = &_industry_draw_tile_data[GetIndustryGfx(ti->tile) << 2 | GetIndustryConstructionStage(ti->tile)];

	image = dits->ground;
	if (image & PALETTE_MODIFIER_COLOR && (image & PALETTE_SPRITE_MASK) == 0)
		image |= ormod;

	z = ti->z;
	/* Add bricks below the industry? */
	if (ti->tileh != SLOPE_FLAT) {
		AddSortableSpriteToDraw(SPR_FOUNDATION_BASE + ti->tileh, ti->x, ti->y, 16, 16, 7, z);
		AddChildSpriteScreen(image, 31, 1);
		z += TILE_HEIGHT;
	} else {
		/* Else draw regular ground */
		DrawGroundSprite(image);
	}

	/* Add industry on top of the ground? */
	image = dits->building;
	if (image != 0) {
		if (image & PALETTE_MODIFIER_COLOR && (image & PALETTE_SPRITE_MASK) == 0)
			image |= ormod;

		if (_display_opt & DO_TRANS_BUILDINGS) MAKE_TRANSPARENT(image);

		AddSortableSpriteToDraw(image,
			ti->x + dits->subtile_x,
			ti->y + dits->subtile_y,
			dits->width  + 1,
			dits->height + 1,
			dits->dz,
			z);

		if (_display_opt & DO_TRANS_BUILDINGS) return;
	}

	{
		int proc = dits->draw_proc - 1;
		if (proc >= 0) _industry_draw_tile_procs[proc](ti);
	}
}

static uint GetSlopeZ_Industry(const TileInfo *ti)
{
	return ti->z + (ti->tileh == SLOPE_FLAT ? 0 : TILE_HEIGHT);
}

static Slope GetSlopeTileh_Industry(TileIndex tile, Slope tileh)
{
	return SLOPE_FLAT;
}

static void GetAcceptedCargo_Industry(TileIndex tile, AcceptedCargo ac)
{
	IndustryGfx gfx = GetIndustryGfx(tile);
	CargoID a;

	a = _industry_section_accepts_1[gfx];
	if (a != CT_INVALID) ac[a] = (a == 0) ? 1 : 8;

	a = _industry_section_accepts_2[gfx];
	if (a != CT_INVALID) ac[a] = 8;

	a = _industry_section_accepts_3[gfx];
	if (a != CT_INVALID) ac[a] = 8;
}

static void GetTileDesc_Industry(TileIndex tile, TileDesc *td)
{
	const Industry *i = GetIndustryByTile(tile);

	td->owner = i->owner;
	td->str = STR_4802_COAL_MINE + i->type;
	if (!IsIndustryCompleted(tile)) {
		SetDParamX(td->dparam, 0, td->str);
		td->str = STR_2058_UNDER_CONSTRUCTION;
	}
}

static int32 ClearTile_Industry(TileIndex tile, byte flags)
{
	Industry *i = GetIndustryByTile(tile);

	/*	* water can destroy industries
			* in editor you can bulldoze industries
			* with magic_bulldozer cheat you can destroy industries
			* (area around OILRIG is water, so water shouldn't flood it
	*/
	if ((_current_player != OWNER_WATER && _game_mode != GM_EDITOR &&
			!_cheats.magic_bulldozer.value) ||
			(_current_player == OWNER_WATER && i->type == IT_OIL_RIG) ) {
 		SetDParam(0, STR_4802_COAL_MINE + i->type);
		return_cmd_error(STR_4800_IN_THE_WAY);
	}

	if (flags & DC_EXEC) DeleteIndustry(i);
	return 0;
}

static void TransportIndustryGoods(TileIndex tile)
{
	Industry *i = GetIndustryByTile(tile);
	const IndustrySpec *indspec = GetIndustrySpec(i->type);
	uint cw, am;

	cw = min(i->cargo_waiting[0], 255);
	if (cw > indspec->minimal_cargo/* && i->produced_cargo[0] != 0xFF*/) {
		i->cargo_waiting[0] -= cw;

		/* fluctuating economy? */
		if (_economy.fluct <= 0) cw = (cw + 1) / 2;

		i->last_mo_production[0] += cw;

		am = MoveGoodsToStation(i->xy, i->width, i->height, i->produced_cargo[0], cw);
		i->last_mo_transported[0] += am;
		if (am != 0) {
			uint newgfx = _industry_produce_section[GetIndustryGfx(tile)];

			if (newgfx != 0xFF) {
				ResetIndustryConstructionStage(tile);
				SetIndustryCompleted(tile, true);
				SetIndustryGfx(tile, newgfx);
				MarkTileDirtyByTile(tile);
			}
		}
	}

	cw = min(i->cargo_waiting[1], 255);
	if (cw > indspec->minimal_cargo) {
		i->cargo_waiting[1] -= cw;

		if (_economy.fluct <= 0) cw = (cw + 1) / 2;

		i->last_mo_production[1] += cw;

		am = MoveGoodsToStation(i->xy, i->width, i->height, i->produced_cargo[1], cw);
		i->last_mo_transported[1] += am;
	}
}


static void AnimateTile_Industry(TileIndex tile)
{
	byte m;

	switch (GetIndustryGfx(tile)) {
	case GFX_SUGAR_MINE_SIEVE:
		if ((_tick_counter & 1) == 0) {
			m = _m[tile].m3 + 1;

			switch (m & 7) {
			case 2:	SndPlayTileFx(SND_2D_RIP_2, tile); break;
			case 6: SndPlayTileFx(SND_29_RIP, tile); break;
			}

			if (m >= 96) {
				m = 0;
				DeleteAnimatedTile(tile);
			}
			_m[tile].m3 = m;

			MarkTileDirtyByTile(tile);
		}
		break;

	case GFX_TOFFEE_QUARY:
		if ((_tick_counter & 3) == 0) {
			m = _m[tile].m3;

			if (_industry_anim_offs[m] == 0xFF) {
				SndPlayTileFx(SND_30_CARTOON_SOUND, tile);
			}

			if (++m >= 70) {
				m = 0;
				DeleteAnimatedTile(tile);
			}
			_m[tile].m3 = m;

			MarkTileDirtyByTile(tile);
		}
		break;

	case GFX_BUBBLE_CATCHER:
		if ((_tick_counter&1) == 0) {
			m = _m[tile].m3;

			if (++m >= 40) {
				m = 0;
				DeleteAnimatedTile(tile);
			}
			_m[tile].m3 = m;

			MarkTileDirtyByTile(tile);
		}
		break;

	// Sparks on a coal plant
	case GFX_POWERPLANT_SPARKS:
		if ((_tick_counter & 3) == 0) {
			m = _m[tile].m1;
			if (GB(m, 2, 5) == 6) {
				SB(_m[tile].m1, 2, 5, 0);
				DeleteAnimatedTile(tile);
			} else {
				_m[tile].m1 = m + (1<<2);
				MarkTileDirtyByTile(tile);
			}
		}
		break;

	case GFX_TOY_FACTORY:
		if ((_tick_counter & 1) == 0) {
			m = _m[tile].m3 + 1;

			if (m == 1) {
				SndPlayTileFx(SND_2C_MACHINERY, tile);
			} else if (m == 23) {
				SndPlayTileFx(SND_2B_COMEDY_HIT, tile);
			} else if (m == 28) {
				SndPlayTileFx(SND_2A_EXTRACT_AND_POP, tile);
			}

			if (m >= 50) {
				int n = GetIndustryAnimationLoop(tile) + 1;
				m = 0;
				if (n >= 8) {
					n = 0;
					DeleteAnimatedTile(tile);
				}
				SetIndustryAnimationLoop(tile, n);
			}
			_m[tile].m3 = m;
			MarkTileDirtyByTile(tile);
		}
		break;

	case 148: case 149: case 150: case 151:
	case 152: case 153: case 154: case 155:
		if ((_tick_counter & 3) == 0) {
			IndustryGfx gfx = GetIndustryGfx(tile);

			gfx = (gfx < 155) ? gfx + 1 : 148;
			SetIndustryGfx(tile, gfx);
			MarkTileDirtyByTile(tile);
		}
		break;

	case GFX_OILWELL_ANIM1:
	case GFX_OILWELL_ANIM2:
	case GFX_OILWELL_ANIM3:
		if ((_tick_counter & 7) == 0) {
			bool b = CHANCE16(1,7);
			IndustryGfx gfx = GetIndustryGfx(tile);

			m = GB(_m[tile].m1, 0, 2) + 1;
			if (m == 4 && (m = 0, ++gfx) == GFX_OILWELL_ANIM3 + 1 && (gfx = GFX_OILWELL_ANIM1, b)) {
				_m[tile].m1 = 0x83;
				SetIndustryGfx(tile, GFX_OILWELL_BASE);
				DeleteAnimatedTile(tile);
			} else {
				SB(_m[tile].m1, 0, 2, m);
				SetIndustryGfx(tile, gfx);
				MarkTileDirtyByTile(tile);
			}
		}
		break;

	case 88:
	case 48:
	case 1: {
			int state = _tick_counter & 0x7FF;

			if ((state -= 0x400) < 0)
				return;

			if (state < 0x1A0) {
				if (state < 0x20 || state >= 0x180) {
					if (!(_m[tile].m1 & 0x40)) {
						_m[tile].m1 |= 0x40;
						SndPlayTileFx(SND_0B_MINING_MACHINERY, tile);
					}
					if (state & 7)
						return;
				} else {
					if (state & 3)
						return;
				}
				m = (_m[tile].m1 + 1) | 0x40;
				if (m > 0xC2) m = 0xC0;
				_m[tile].m1 = m;
				MarkTileDirtyByTile(tile);
			} else if (state >= 0x200 && state < 0x3A0) {
				int i;
				i = (state < 0x220 || state >= 0x380) ? 7 : 3;
				if (state & i)
					return;

				m = (_m[tile].m1 & 0xBF) - 1;
				if (m < 0x80) m = 0x82;
				_m[tile].m1 = m;
				MarkTileDirtyByTile(tile);
			}
		} break;
	}
}

static void CreateIndustryEffectSmoke(TileIndex tile)
{
	uint x = TileX(tile) * TILE_SIZE;
	uint y = TileY(tile) * TILE_SIZE;
	uint z = GetTileMaxZ(tile);

	CreateEffectVehicle(x + 15, y + 14, z + 59, EV_CHIMNEY_SMOKE);
}

static void MakeIndustryTileBigger(TileIndex tile)
{
	byte cnt = GetIndustryConstructionCounter(tile) + 1;
	byte stage;

	if (cnt != 4) {
		SetIndustryConstructionCounter(tile, cnt);
		return;
	}

	stage = GetIndustryConstructionStage(tile) + 1;
	SetIndustryConstructionCounter(tile, 0);
	SetIndustryConstructionStage(tile, stage);
	if (stage == 3) {
		SetIndustryCompleted(tile, true);
	}

	MarkTileDirtyByTile(tile);

	if (!IsIndustryCompleted(tile)) return;

	switch (GetIndustryGfx(tile)) {
	case 8:
		CreateIndustryEffectSmoke(tile);
		break;

	case 24:
		if (GetIndustryGfx(tile + TileDiffXY(0, 1)) == 24) BuildOilRig(tile);
		break;

	case GFX_TOY_FACTORY:
	case GFX_BUBBLE_CATCHER:
	case GFX_TOFFEE_QUARY:
		_m[tile].m3 = 0;
		SetIndustryAnimationLoop(tile, 0);
		break;

	case 148: case 149: case 150: case 151:
	case 152: case 153: case 154: case 155:
		AddAnimatedTile(tile);
		break;
	}
}


static void TileLoopIndustry_BubbleGenerator(TileIndex tile)
{
	int dir;
	Vehicle *v;
	static const int8 _tileloop_ind_case_161[12] = {
		11, 0, -4, -14,
		-4, -10, -4, 1,
		49, 59, 60, 65,
	};

	SndPlayTileFx(SND_2E_EXTRACT_AND_POP, tile);

	dir = Random() & 3;

	v = CreateEffectVehicleAbove(
		TileX(tile) * TILE_SIZE + _tileloop_ind_case_161[dir + 0],
		TileY(tile) * TILE_SIZE + _tileloop_ind_case_161[dir + 4],
		_tileloop_ind_case_161[dir + 8],
		EV_BUBBLE
	);

	if (v != NULL) v->u.special.unk2 = dir;
}

static void TileLoop_Industry(TileIndex tile)
{
	IndustryGfx newgfx;

	if (!IsIndustryCompleted(tile)) {
		MakeIndustryTileBigger(tile);
		return;
	}

	if (_game_mode == GM_EDITOR) return;

	TransportIndustryGoods(tile);

	newgfx = _industry_section_animation_next[GetIndustryGfx(tile)];
	if (newgfx != 255) {
		ResetIndustryConstructionStage(tile);
		SetIndustryGfx(tile, newgfx);
		MarkTileDirtyByTile(tile);
		return;
	}

#define SET_AND_ANIMATE(tile, a, b)   { SetIndustryGfx(tile, a); _m[tile].m1 = b; AddAnimatedTile(tile); }
#define SET_AND_UNANIMATE(tile, a, b) { SetIndustryGfx(tile, a); _m[tile].m1 = b; DeleteAnimatedTile(tile); }

	switch (GetIndustryGfx(tile)) {
	case 0x18: // coast line at oilrigs
	case 0x19:
	case 0x1A:
	case 0x1B:
	case 0x1C:
		TileLoop_Water(tile);
		break;

	case 0:
		if (!(_tick_counter & 0x400) && CHANCE16(1,2))
			SET_AND_ANIMATE(tile,1,0x80);
		break;

	case 47:
		if (!(_tick_counter & 0x400) && CHANCE16(1,2))
			SET_AND_ANIMATE(tile,0x30,0x80);
		break;

	case 79:
		if (!(_tick_counter & 0x400) && CHANCE16(1,2))
			SET_AND_ANIMATE(tile,0x58,0x80);
		break;

	case 29:
		if (CHANCE16(1,6))
			SET_AND_ANIMATE(tile,0x1E,0x80);
		break;

	case 1:
		if (!(_tick_counter & 0x400))
			SET_AND_UNANIMATE(tile, 0, 0x83);
		break;

	case 48:
		if (!(_tick_counter & 0x400))
			SET_AND_UNANIMATE(tile, 0x2F, 0x83);
		break;

	case 88:
		if (!(_tick_counter & 0x400))
			SET_AND_UNANIMATE(tile, 0x4F, 0x83);
		break;

	case 10:
		if (CHANCE16(1,3)) {
			SndPlayTileFx(SND_0C_ELECTRIC_SPARK, tile);
			AddAnimatedTile(tile);
		}
		break;

	case 49:
		CreateEffectVehicleAbove(TileX(tile) * TILE_SIZE + 6, TileY(tile) * TILE_SIZE + 6, 43, EV_SMOKE);
		break;


	case 143: {
			Industry *i = GetIndustryByTile(tile);
			if (i->was_cargo_delivered) {
				i->was_cargo_delivered = false;
				SetIndustryAnimationLoop(tile, 0);
				AddAnimatedTile(tile);
			}
		}
		break;

	case 161:
		TileLoopIndustry_BubbleGenerator(tile);
		break;

	case 165:
		AddAnimatedTile(tile);
		break;

	case 174:
		if (CHANCE16(1, 3)) AddAnimatedTile(tile);
		break;
	}
}


static void ClickTile_Industry(TileIndex tile)
{
	ShowIndustryViewWindow(GetIndustryIndex(tile));
}

static uint32 GetTileTrackStatus_Industry(TileIndex tile, TransportType mode)
{
	return 0;
}

static void GetProducedCargo_Industry(TileIndex tile, CargoID *b)
{
	const Industry *i = GetIndustryByTile(tile);

	b[0] = i->produced_cargo[0];
	b[1] = i->produced_cargo[1];
}

static void ChangeTileOwner_Industry(TileIndex tile, PlayerID old_player, PlayerID new_player)
{
	/* not used */
}

void DeleteIndustry(Industry *i)
{
	BEGIN_TILE_LOOP(tile_cur, i->width, i->height, i->xy);
		if (IsTileType(tile_cur, MP_INDUSTRY)) {
			if (GetIndustryIndex(tile_cur) == i->index) {
				DoClearSquare(tile_cur);
			}
		} else if (IsTileType(tile_cur, MP_STATION) && IsOilRig(tile_cur)) {
			DeleteOilRig(tile_cur);
		}
	END_TILE_LOOP(tile_cur, i->width, i->height, i->xy);

	i->xy = 0;
	_industry_sort_dirty = true;
	DeleteSubsidyWithIndustry(i->index);
	DeleteWindowById(WC_INDUSTRY_VIEW, i->index);
	InvalidateWindow(WC_INDUSTRY_DIRECTORY, 0);
}

static const byte _plantfarmfield_type[] = {1, 1, 1, 1, 1, 3, 3, 4, 4, 4, 5, 5, 5, 6, 6, 6};

static bool IsBadFarmFieldTile(TileIndex tile)
{
	switch (GetTileType(tile)) {
		case MP_CLEAR: return IsClearGround(tile, CLEAR_FIELDS) || IsClearGround(tile, CLEAR_SNOW);
		case MP_TREES: return false;
		default:       return true;
	}
}

static bool IsBadFarmFieldTile2(TileIndex tile)
{
	switch (GetTileType(tile)) {
		case MP_CLEAR: return IsClearGround(tile, CLEAR_SNOW);
		case MP_TREES: return false;
		default:       return true;
	}
}

static void SetupFarmFieldFence(TileIndex tile, int size, byte type, Axis direction)
{
	do {
		tile = TILE_MASK(tile);

		if (IsTileType(tile, MP_CLEAR) || IsTileType(tile, MP_TREES)) {
			byte or = type;

			if (or == 1 && CHANCE16(1, 7)) or = 2;

			if (direction == AXIS_X) {
				SetFenceSE(tile, or);
			} else {
				SetFenceSW(tile, or);
			}
		}

		tile += (direction == AXIS_X ? TileDiffXY(1, 0) : TileDiffXY(0, 1));
	} while (--size);
}

static void PlantFarmField(TileIndex tile)
{
	uint size_x, size_y;
	uint32 r;
	uint count;
	uint counter;
	uint field_type;
	int type;

	if (_opt.landscape == LT_HILLY) {
		if (GetTileZ(tile) + TILE_HEIGHT * 2 >= _opt.snow_line)
			return;
	}

	/* determine field size */
	r = (Random() & 0x303) + 0x404;
	if (_opt.landscape == LT_HILLY) r += 0x404;
	size_x = GB(r, 0, 8);
	size_y = GB(r, 8, 8);

	/* offset tile to match size */
	tile -= TileDiffXY(size_x / 2, size_y / 2);

	/* check the amount of bad tiles */
	count = 0;
	BEGIN_TILE_LOOP(cur_tile, size_x, size_y, tile)
		cur_tile = TILE_MASK(cur_tile);
		count += IsBadFarmFieldTile(cur_tile);
	END_TILE_LOOP(cur_tile, size_x, size_y, tile)
	if (count * 2 >= size_x * size_y) return;

	/* determine type of field */
	r = Random();
	counter = GB(r, 5, 3);
	field_type = GB(r, 8, 8) * 9 >> 8;

	/* make field */
	BEGIN_TILE_LOOP(cur_tile, size_x, size_y, tile)
		cur_tile = TILE_MASK(cur_tile);
		if (!IsBadFarmFieldTile2(cur_tile)) {
			MakeField(cur_tile, field_type);
			SetClearCounter(cur_tile, counter);
			MarkTileDirtyByTile(cur_tile);
		}
	END_TILE_LOOP(cur_tile, size_x, size_y, tile)

	type = 3;
	if (_opt.landscape != LT_HILLY && _opt.landscape != LT_DESERT) {
		type = _plantfarmfield_type[Random() & 0xF];
	}

	SetupFarmFieldFence(tile - TileDiffXY(1, 0), size_y, type, AXIS_Y);
	SetupFarmFieldFence(tile - TileDiffXY(0, 1), size_x, type, AXIS_X);
	SetupFarmFieldFence(tile + TileDiffXY(size_x - 1, 0), size_y, type, AXIS_Y);
	SetupFarmFieldFence(tile + TileDiffXY(0, size_y - 1), size_x, type, AXIS_X);
}

static void MaybePlantFarmField(const Industry *i)
{
	if (CHANCE16(1, 8)) {
		int x = i->width  / 2 + Random() % 31 - 16;
		int y = i->height / 2 + Random() % 31 - 16;
		TileIndex tile = TileAddWrap(i->xy, x, y);
		if (tile != INVALID_TILE) PlantFarmField(tile);
	}
}

static void ChopLumberMillTrees(Industry *i)
{
	static const TileIndexDiffC _chop_dir[] = {
		{ 0,  1},
		{ 1,  0},
		{ 0, -1},
		{-1,  0}
	};

	TileIndex tile = i->xy;
	int a;

	if (!IsIndustryCompleted(tile)) return;

	/* search outwards as a rectangular spiral */
	for (a = 1; a != 41; a += 2) {
		uint dir;

		for (dir = 0; dir != 4; dir++) {
			int j = a;

			do {
				tile = TILE_MASK(tile);
				if (IsTileType(tile, MP_TREES)) {
					PlayerID old_player = _current_player;
					/* found a tree */

					_current_player = OWNER_NONE;
					_industry_sound_ctr = 1;
					_industry_sound_tile = tile;
					SndPlayTileFx(SND_38_CHAINSAW, tile);

					DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);
					SetTropicZone(tile, TROPICZONE_INVALID);

					i->cargo_waiting[0] = min(0xffff, i->cargo_waiting[0] + 45);

					_current_player = old_player;
					return;
				}
				tile += ToTileIndexDiff(_chop_dir[dir]);
			} while (--j);
		}
		tile -= TileDiffXY(1, 1);
	}
}

static const byte _industry_sounds[37][2] = {
	{0},
	{0},
	{1, SND_28_SAWMILL},
	{0},
	{0},
	{0},
	{1, SND_03_FACTORY_WHISTLE},
	{1, SND_03_FACTORY_WHISTLE},
	{0},
	{3, SND_24_SHEEP},
	{0},
	{0},
	{0},
	{0},
	{1, SND_28_SAWMILL},
	{0},
	{0},
	{0},
	{0},
	{0},
	{0},
	{0},
	{0},
	{1, SND_03_FACTORY_WHISTLE},
	{0},
	{0},
	{0},
	{0},
	{0},
	{0},
	{0},
	{0},
	{1, SND_33_PLASTIC_MINE},
	{0},
	{0},
	{0},
	{0},
};


static void ProduceIndustryGoods(Industry *i)
{
	uint32 r;
	uint num;

	/* play a sound? */
	if ((i->counter & 0x3F) == 0) {
		if (CHANCE16R(1,14,r) && (num=_industry_sounds[i->type][0]) != 0) {
			SndPlayTileFx(
				_industry_sounds[i->type][1] + (((r >> 16) * num) >> 16),
				i->xy);
		}
	}

	i->counter--;

	/* produce some cargo */
	if ((i->counter & 0xFF) == 0) {
		i->cargo_waiting[0] = min(0xffff, i->cargo_waiting[0] + i->production_rate[0]);
		i->cargo_waiting[1] = min(0xffff, i->cargo_waiting[1] + i->production_rate[1]);

		if (i->type == IT_FARM) {
			MaybePlantFarmField(i);
		} else if (i->type == IT_LUMBER_MILL && (i->counter & 0x1FF) == 0) {
			ChopLumberMillTrees(i);
		}
	}
}

void OnTick_Industry(void)
{
	Industry *i;

	if (_industry_sound_ctr != 0) {
		_industry_sound_ctr++;

		if (_industry_sound_ctr == 75) {
			SndPlayTileFx(SND_37_BALLOON_SQUEAK, _industry_sound_tile);
		} else if (_industry_sound_ctr == 160) {
			_industry_sound_ctr = 0;
			SndPlayTileFx(SND_36_CARTOON_CRASH, _industry_sound_tile);
		}
	}

	if (_game_mode == GM_EDITOR) return;

	FOR_ALL_INDUSTRIES(i) {
		if (i->xy != 0) ProduceIndustryGoods(i);
	}
}


static bool CheckNewIndustry_NULL(TileIndex tile)
{
	return true;
}

static bool CheckNewIndustry_Forest(TileIndex tile)
{
	if (_opt.landscape == LT_HILLY) {
		if (GetTileZ(tile) < _opt.snow_line + TILE_HEIGHT * 2U) {
			_error_message = STR_4831_FOREST_CAN_ONLY_BE_PLANTED;
			return false;
		}
	}
	return true;
}

static bool CheckNewIndustry_OilRefinery(TileIndex tile)
{
	if (_game_mode == GM_EDITOR) return true;
	if (DistanceFromEdge(TILE_ADDXY(tile, 1, 1)) < 16) return true;

	_error_message = STR_483B_CAN_ONLY_BE_POSITIONED;
	return false;
}

extern bool _ignore_restrictions;

static bool CheckNewIndustry_OilRig(TileIndex tile)
{
	if (_game_mode == GM_EDITOR && _ignore_restrictions) return true;
	if (TileHeight(tile) == 0 &&
			DistanceFromEdge(TILE_ADDXY(tile, 1, 1)) < 16)   return true;

	_error_message = STR_483B_CAN_ONLY_BE_POSITIONED;
	return false;
}

static bool CheckNewIndustry_Farm(TileIndex tile)
{
	if (_opt.landscape == LT_HILLY) {
		if (GetTileZ(tile) + TILE_HEIGHT * 2 >= _opt.snow_line) {
			_error_message = STR_0239_SITE_UNSUITABLE;
			return false;
		}
	}
	return true;
}

static bool CheckNewIndustry_Plantation(TileIndex tile)
{
	if (GetTropicZone(tile) == TROPICZONE_DESERT) {
		_error_message = STR_0239_SITE_UNSUITABLE;
		return false;
	}

	return true;
}

static bool CheckNewIndustry_Water(TileIndex tile)
{
	if (GetTropicZone(tile) != TROPICZONE_DESERT) {
		_error_message = STR_0318_CAN_ONLY_BE_BUILT_IN_DESERT;
		return false;
	}

	return true;
}

static bool CheckNewIndustry_Lumbermill(TileIndex tile)
{
	if (GetTropicZone(tile) != TROPICZONE_RAINFOREST) {
		_error_message = STR_0317_CAN_ONLY_BE_BUILT_IN_RAINFOREST;
		return false;
	}
	return true;
}

static bool CheckNewIndustry_BubbleGen(TileIndex tile)
{
	return GetTileZ(tile) <= TILE_HEIGHT * 4;
}

typedef bool CheckNewIndustryProc(TileIndex tile);
static CheckNewIndustryProc * const _check_new_industry_procs[CHECK_END] = {
	CheckNewIndustry_NULL,
	CheckNewIndustry_Forest,
	CheckNewIndustry_OilRefinery,
	CheckNewIndustry_Farm,
	CheckNewIndustry_Plantation,
	CheckNewIndustry_Water,
	CheckNewIndustry_Lumbermill,
	CheckNewIndustry_BubbleGen,
	CheckNewIndustry_OilRig
};

static bool CheckSuitableIndustryPos(TileIndex tile)
{
	uint x = TileX(tile);
	uint y = TileY(tile);

	if (x < 2 || y < 2 || x > MapMaxX() - 3 || y > MapMaxY() - 3) {
		_error_message = STR_0239_SITE_UNSUITABLE;
		return false;
	}

	return true;
}

static const Town *CheckMultipleIndustryInTown(TileIndex tile, int type)
{
	const Town *t;
	const Industry *i;

	t = ClosestTownFromTile(tile, (uint)-1);

	if (_patches.multiple_industry_per_town) return t;

	FOR_ALL_INDUSTRIES(i) {
		if (i->xy != 0 &&
				i->type == (byte)type &&
				i->town == t) {
			_error_message = STR_0287_ONLY_ONE_ALLOWED_PER_TOWN;
			return NULL;
		}
	}

	return t;
}

static const byte _industry_section_bits[] = {
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 4, 2, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 4, 2, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16, 16,
	16, 16, 16, 16, 16, 16, 16,
};

static bool CheckIfIndustryTilesAreFree(TileIndex tile, const IndustryTileTable *it, int type, const Town *t)
{
	_error_message = STR_0239_SITE_UNSUITABLE;

	do {
		TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);

		if (!IsValidTile(cur_tile)) {
			if (it->gfx == 0xff) continue;
			return false;
		}

		if (it->gfx == 0xFF) {
			if (!IsTileType(cur_tile, MP_WATER) ||
					GetTileSlope(cur_tile, NULL) != SLOPE_FLAT) {
				return false;
			}
		} else {
			if (!EnsureNoVehicle(cur_tile)) return false;

			if (type == IT_OIL_RIG)  {
				if (!IsTileType(cur_tile, MP_WATER) || _m[cur_tile].m5 != 0) return false;
			} else {
				Slope tileh;

				if (IsTileType(cur_tile, MP_WATER) && _m[cur_tile].m5 == 0) return false;

				tileh = GetTileSlope(cur_tile, NULL);
				if (IsSteepSlope(tileh)) return false;

				if (tileh != SLOPE_FLAT) {
					Slope t;
					byte bits = _industry_section_bits[it->gfx];

					if (bits & 0x10) return false;

					t = ComplementSlope(tileh);

					if (bits & 1 && (t & SLOPE_NW)) return false;
					if (bits & 2 && (t & SLOPE_NE)) return false;
					if (bits & 4 && (t & SLOPE_SW)) return false;
					if (bits & 8 && (t & SLOPE_SE)) return false;
				}

				if (type == IT_BANK_TEMP) {
					if (!IsTileType(cur_tile, MP_HOUSE) || t->population < 1200) {
						_error_message = STR_029D_CAN_ONLY_BE_BUILT_IN_TOWNS;
						return false;
					}
				} else if (type == IT_BANK_TROPIC_ARCTIC) {
					if (!IsTileType(cur_tile, MP_HOUSE)) {
						_error_message = STR_030D_CAN_ONLY_BE_BUILT_IN_TOWNS;
						return false;
					}
				} else if (type == IT_TOY_SHOP) {
					if (DistanceMax(t->xy, cur_tile) > 9) return false;
					if (!IsTileType(cur_tile, MP_HOUSE)) goto do_clear;
				} else if (type == IT_WATER_TOWER) {
					if (!IsTileType(cur_tile, MP_HOUSE)) {
						_error_message = STR_0316_CAN_ONLY_BE_BUILT_IN_TOWNS;
						return false;
					}
				} else {
do_clear:
					if (CmdFailed(DoCommand(cur_tile, 0, 0, DC_AUTO, CMD_LANDSCAPE_CLEAR)))
						return false;
				}
			}
		}
	} while ((++it)->ti.x != -0x80);

	return true;
}

static bool CheckIfTooCloseToIndustry(TileIndex tile, int type)
{
	const IndustrySpec *indspec = GetIndustrySpec(type);
	const Industry *i;

	// accepting industries won't be close, not even with patch
	if (_patches.same_industry_close && indspec->accepts_cargo[0] == CT_INVALID)
		return true;

	FOR_ALL_INDUSTRIES(i) {
		// check if an industry that accepts the same goods is nearby
		if (i->xy != 0 &&
				DistanceMax(tile, i->xy) <= 14 &&
				indspec->accepts_cargo[0] != CT_INVALID &&
				indspec->accepts_cargo[0] == i->accepts_cargo[0] && (
					_game_mode != GM_EDITOR ||
					!_patches.same_industry_close ||
					!_patches.multiple_industry_per_town
				)) {
			_error_message = STR_INDUSTRY_TOO_CLOSE;
			return false;
		}

		// check "not close to" field.
		if (i->xy != 0 &&
				(i->type == indspec->conflicting[0] || i->type == indspec->conflicting[1] || i->type == indspec->conflicting[2]) &&
				DistanceMax(tile, i->xy) <= 14) {
			_error_message = STR_INDUSTRY_TOO_CLOSE;
			return false;
		}
	}
	return true;
}

static Industry *AllocateIndustry(void)
{
	Industry *i;

	FOR_ALL_INDUSTRIES(i) {
		if (i->xy == 0) {
			uint index = i->index;

			if (i->index > _total_industries) _total_industries = i->index;

			memset(i, 0, sizeof(*i));
			i->index = index;

			return i;
		}
	}

	/* Check if we can add a block to the pool */
	return AddBlockToPool(&_industry_pool) ? AllocateIndustry() : NULL;
}

static void DoCreateNewIndustry(Industry *i, TileIndex tile, int type, const IndustryTileTable *it, const Town *t, byte owner)
{
	const IndustrySpec *indspec = GetIndustrySpec(type);
	uint32 r;
	int j;

	i->xy = tile;
	i->width = i->height = 0;
	i->type = type;

	i->produced_cargo[0] = indspec->produced_cargo[0];
	i->produced_cargo[1] = indspec->produced_cargo[1];
	i->accepts_cargo[0] = indspec->accepts_cargo[0];
	i->accepts_cargo[1] = indspec->accepts_cargo[1];
	i->accepts_cargo[2] = indspec->accepts_cargo[2];
	i->production_rate[0] = indspec->production_rate[0];
	i->production_rate[1] = indspec->production_rate[1];

	if (_patches.smooth_economy) {
		i->production_rate[0] = min((RandomRange(256) + 128) * i->production_rate[0] >> 8 , 255);
		i->production_rate[1] = min((RandomRange(256) + 128) * i->production_rate[1] >> 8 , 255);
	}

	i->town = t;
	i->owner = owner;

	r = Random();
	i->color_map = GB(r, 8, 4);
	i->counter = GB(r, 0, 12);
	i->cargo_waiting[0] = 0;
	i->cargo_waiting[1] = 0;
	i->last_mo_production[0] = 0;
	i->last_mo_production[1] = 0;
	i->last_mo_transported[0] = 0;
	i->last_mo_transported[1] = 0;
	i->pct_transported[0] = 0;
	i->pct_transported[1] = 0;
	i->total_transported[0] = 0;
	i->total_transported[1] = 0;
	i->was_cargo_delivered = false;
	i->last_prod_year = _cur_year;
	i->total_production[0] = i->production_rate[0] * 8;
	i->total_production[1] = i->production_rate[1] * 8;

	if (!_generating_world) i->total_production[0] = i->total_production[1] = 0;

	i->prod_level = 0x10;

	do {
		TileIndex cur_tile = tile + ToTileIndexDiff(it->ti);

		if (it->gfx != 0xFF) {
			byte size;

			size = it->ti.x;
			if (size > i->width) i->width = size;
			size = it->ti.y;
			if (size > i->height)i->height = size;

			DoCommand(cur_tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

			MakeIndustry(cur_tile, i->index, it->gfx);
			if (_generating_world) _m[cur_tile].m1 = 0x1E; /* maturity */
		}
	} while ((++it)->ti.x != -0x80);

	i->width++;
	i->height++;

	if (i->type == IT_FARM || i->type == IT_FARM_2) {
		tile = i->xy + TileDiffXY(i->width / 2, i->height / 2);
		for (j = 0; j != 50; j++) {
			int x = Random() % 31 - 16;
			int y = Random() % 31 - 16;
			TileIndex new_tile = TileAddWrap(tile, x, y);

			if (new_tile != INVALID_TILE) PlantFarmField(new_tile);
		}
	}
	_industry_sort_dirty = true;
	InvalidateWindow(WC_INDUSTRY_DIRECTORY, 0);
}

/** Build/Fund an industry
 * @param tile tile where industry is built
 * @param p1 industry type @see build_industry.h and @see industry.h
 * @param p2 unused
 */
int32 CmdBuildIndustry(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
{
	const Town *t;
	Industry *i;
	int num;
	const IndustryTileTable * const *itt;
	const IndustryTileTable *it;
	const IndustrySpec *indspec;

	SET_EXPENSES_TYPE(EXPENSES_OTHER);

	if (!CheckSuitableIndustryPos(tile)) return CMD_ERROR;

	/* Check if the to-be built/founded industry is available for this climate.
	 * Unfortunately we have no easy way of checking, except for looping the table */
	{
		const byte *i;
		bool found = false;

		for (i = &_build_industry_types[_opt_ptr->landscape][0]; i != endof(_build_industry_types[_opt_ptr->landscape]); i++) {
			if (*i == p1) {
				found = true;
				break;
			}
		}
		if (!found) return CMD_ERROR;
	}

	indspec = GetIndustrySpec(p1);
	/* If the patch for raw-material industries is not on, you cannot build raw-material industries.
	 * Raw material industries are industries that do not accept cargo (at least for now)
	 * Exclude the lumber mill (only "raw" industry that can be built) */
	if (!_patches.build_rawmaterial_ind &&
			indspec->accepts_cargo[0] == CT_INVALID &&
			indspec->accepts_cargo[1] == CT_INVALID &&
			indspec->accepts_cargo[2] == CT_INVALID &&
			p1 != IT_LUMBER_MILL) {
		return CMD_ERROR;
	}

	if (!_check_new_industry_procs[indspec->check_proc](tile)) return CMD_ERROR;

	t = CheckMultipleIndustryInTown(tile, p1);
	if (t == NULL) return CMD_ERROR;

	num = indspec->num_table;
	itt = indspec->table;

	do {
		if (--num < 0) return_cmd_error(STR_0239_SITE_UNSUITABLE);
	} while (!CheckIfIndustryTilesAreFree(tile, it = itt[num], p1, t));


	if (!CheckIfTooCloseToIndustry(tile, p1)) return CMD_ERROR;

	i = AllocateIndustry();
	if (i == NULL) return CMD_ERROR;

	if (flags & DC_EXEC) DoCreateNewIndustry(i, tile, p1, it, t, OWNER_NONE);

	return (_price.build_industry >> 5) * indspec->cost_multiplier;
}


Industry *CreateNewIndustry(TileIndex tile, IndustryType type)
{
	const Town *t;
	const IndustryTileTable *it;
	Industry *i;

	const IndustrySpec *indspec;

	if (!CheckSuitableIndustryPos(tile)) return NULL;

	indspec =  GetIndustrySpec(type);

	if (!_check_new_industry_procs[indspec->check_proc](tile)) return NULL;

	t = CheckMultipleIndustryInTown(tile, type);
	if (t == NULL) return NULL;

	/* pick a random layout */
	it = indspec->table[RandomRange(indspec->num_table)];

	if (!CheckIfIndustryTilesAreFree(tile, it, type, t)) return NULL;
	if (!CheckIfTooCloseToIndustry(tile, type)) return NULL;

	i = AllocateIndustry();
	if (i == NULL) return NULL;

	DoCreateNewIndustry(i, tile, type, it, t, OWNER_NONE);

	return i;
}

static const byte _numof_industry_table[4][12] = {
	// difficulty settings for number of industries
	{0, 0, 0, 0, 0, 0, 0, 0,  0,  0,  0},   //none
	{0, 1, 1, 1, 2, 2, 3, 3,  4,  4,  5},   //low
	{0, 1, 2, 3, 4, 5, 6, 7,  8,  9, 10},   //normal
	{0, 2, 3, 4, 6, 7, 8, 9, 10, 10, 10},   //high
};

static void PlaceInitialIndustry(IndustryType type, int amount)
{
	int num = _numof_industry_table[_opt.diff.number_industries][amount];

	if (type == IT_OIL_REFINERY || type == IT_OIL_RIG) {
		// These are always placed next to the coastline, so we scale by the perimeter instead.
		num = ScaleByMapSize1D(num);
	} else {
		num = ScaleByMapSize(num);
	}

	if (_opt.diff.number_industries != 0) {
		PlayerID old_player = _current_player;
		_current_player = OWNER_NONE;
		assert(num > 0);

		do {
			uint i;

			for (i = 0; i < 2000; i++) {
				if (CreateNewIndustry(RandomTile(), type) != NULL) break;
			}
		} while (--num);

		_current_player = old_player;
	}
}

void GenerateIndustries(void)
{
	const byte *b;

	b = _industry_create_table[_opt.landscape];
	do {
		PlaceInitialIndustry(b[1], b[0]);
	} while ( (b+=2)[0] != 0);
}

/* Change industry production or do closure */
static void ExtChangeIndustryProduction(Industry *i)
{
	bool closeit = true;
	int j;
	const IndustrySpec *indspec = GetIndustrySpec(i->type);

	switch (_industry_close_mode[i->type]) {
		case INDUSTRYLIFE_NOT_CLOSABLE:
			return;

		case INDUSTRYLIFE_CLOSABLE:
			if ((byte)(_cur_year - i->last_prod_year) < 5 || !CHANCE16(1, 180))
				closeit = false;
			break;

		default: /* INDUSTRY_PRODUCTION */
			for (j = 0; j < 2 && i->produced_cargo[j] != CT_INVALID; j++){
				uint32 r = Random();
				int old, new, percent;
				int mag;

				new = old = i->production_rate[j];
				if (CHANCE16I(20, 1024, r))
					new -= ((RandomRange(50) + 10) * old) >> 8;
				if (CHANCE16I(20 + (i->pct_transported[j] * 20 >> 8), 1024, r >> 16))
					new += ((RandomRange(50) + 10) * old) >> 8;

				new = clamp(new, 0, 255);
				if (new == old) {
					closeit = false;
					continue;
				}

				percent = new * 100 / old - 100;
				i->production_rate[j] = new;

				if (new >= indspec->production_rate[j] / 4)
					closeit = false;

				mag = abs(percent);
				if (mag >= 10) {
					SetDParam(2, mag);
					SetDParam(0, _cargoc.names_s[i->produced_cargo[j]]);
					SetDParam(1, i->index);
					AddNewsItem(
						percent >= 0 ? STR_INDUSTRY_PROD_GOUP : STR_INDUSTRY_PROD_GODOWN,
						NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_TILE, NT_ECONOMY, 0),
						i->xy + TileDiffXY(1, 1), 0
					);
				}
			}
			break;
	}

	/* If industry will be closed down, show this */
	if (closeit) {
		i->prod_level = 0;
		SetDParam(0, i->index);
		AddNewsItem(
			indspec->closure_text,
			NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_TILE, NT_ECONOMY, 0),
			i->xy + TileDiffXY(1, 1), 0
		);
	}
}


static void UpdateIndustryStatistics(Industry *i)
{
	byte pct;

	if (i->produced_cargo[0] != CT_INVALID) {
		pct = 0;
		if (i->last_mo_production[0] != 0) {
			i->last_prod_year = _cur_year;
			pct = min(i->last_mo_transported[0] * 256 / i->last_mo_production[0],255);
		}
		i->pct_transported[0] = pct;

		i->total_production[0] = i->last_mo_production[0];
		i->last_mo_production[0] = 0;

		i->total_transported[0] = i->last_mo_transported[0];
		i->last_mo_transported[0] = 0;
	}

	if (i->produced_cargo[1] != CT_INVALID) {
		pct = 0;
		if (i->last_mo_production[1] != 0) {
			i->last_prod_year = _cur_year;
			pct = min(i->last_mo_transported[1] * 256 / i->last_mo_production[1],255);
		}
		i->pct_transported[1] = pct;

		i->total_production[1] = i->last_mo_production[1];
		i->last_mo_production[1] = 0;

		i->total_transported[1] = i->last_mo_transported[1];
		i->last_mo_transported[1] = 0;
	}


	if (i->produced_cargo[0] != CT_INVALID || i->produced_cargo[1] != CT_INVALID)
		InvalidateWindow(WC_INDUSTRY_VIEW, i->index);

	if (i->prod_level == 0) {
		DeleteIndustry(i);
	} else if (_patches.smooth_economy) {
		ExtChangeIndustryProduction(i);
	}
}

static const byte _new_industry_rand[4][32] = {
	{12,12,12,12,12,12,12, 0, 0, 6, 6, 9, 9, 3, 3, 3,18,18, 4, 4, 2, 2, 5, 5, 5, 5, 5, 5, 1, 1, 8, 8},
	{16,16,16, 0, 0, 0, 9, 9, 9, 9,13,13, 3, 3, 3, 3,15,15,15, 4, 4,11,11,11,11,11,14,14, 1, 1, 7, 7},
	{21,21,21,24,22,22,22,22,23,23,16,16,16, 4, 4,19,19,19,13,13,20,20,20,11,11,11,17,17,17,10,10,10},
	{30,30,30,36,36,31,31,31,27,27,27,28,28,28,26,26,26,34,34,34,35,35,35,29,29,29,32,32,32,33,33,33},
};

static void MaybeNewIndustry(uint32 r)
{
	int type;
	int j;
	Industry *i;

	type = _new_industry_rand[_opt.landscape][GB(r, 16, 5)];

	if (type == IT_OIL_WELL && _date > 10958) return;
	if (type == IT_OIL_RIG  && _date < 14610) return;

	j = 2000;
	for (;;) {
		i = CreateNewIndustry(RandomTile(), type);
		if (i != NULL) break;
		if (--j == 0) return;
	}

	SetDParam(0, type + STR_4802_COAL_MINE);
	SetDParam(1, i->town->index);
	AddNewsItem(
		(type != IT_FOREST && type != IT_FRUIT_PLANTATION && type != IT_RUBBER_PLANTATION && type != IT_COTTON_CANDY) ?
			STR_482D_NEW_UNDER_CONSTRUCTION : STR_482E_NEW_BEING_PLANTED_NEAR,
		NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_TILE, NT_ECONOMY,0), i->xy, 0
	);
}

static void ChangeIndustryProduction(Industry *i)
{
	bool only_decrease = false;
	StringID str = STR_NULL;
	int type = i->type;
	const IndustrySpec *indspec = GetIndustrySpec(type);

	switch (_industry_close_mode[type]) {
		case INDUSTRYLIFE_NOT_CLOSABLE:
			return;

		case INDUSTRYLIFE_PRODUCTION:
			/* decrease or increase */
			if (type == IT_OIL_WELL && _opt.landscape == LT_NORMAL)
				only_decrease = true;

			if (only_decrease || CHANCE16(1,3)) {
				/* If you transport > 60%, 66% chance we increase, else 33% chance we increase */
				if (!only_decrease && (i->pct_transported[0] > 153) != CHANCE16(1,3)) {
					/* Increase production */
					if (i->prod_level != 0x80) {
						byte b;

						i->prod_level <<= 1;

						b = i->production_rate[0] * 2;
						if (i->production_rate[0] >= 128)
							b = 0xFF;
						i->production_rate[0] = b;

						b = i->production_rate[1] * 2;
						if (i->production_rate[1] >= 128)
							b = 0xFF;
						i->production_rate[1] = b;

						str = indspec->production_up_text;
					}
				} else {
					/* Decrease production */
					if (i->prod_level == 4) {
						i->prod_level = 0;
						str = indspec->closure_text;
					} else {
						i->prod_level >>= 1;
						i->production_rate[0] = (i->production_rate[0] + 1) >> 1;
						i->production_rate[1] = (i->production_rate[1] + 1) >> 1;

						str = indspec->production_down_text;
					}
				}
			}
			break;

		case INDUSTRYLIFE_CLOSABLE:
			/* maybe close */
			if ( (byte)(_cur_year - i->last_prod_year) >= 5 && CHANCE16(1,2)) {
				i->prod_level = 0;
				str = indspec->closure_text;
			}
			break;
	}

	if (str != STR_NULL) {
		SetDParam(0, i->index);
		AddNewsItem(str, NEWS_FLAGS(NM_THIN, NF_VIEWPORT|NF_TILE, NT_ECONOMY, 0), i->xy + TileDiffXY(1, 1), 0);
	}
}

void IndustryMonthlyLoop(void)
{
	Industry *i;
	PlayerID old_player = _current_player;
	_current_player = OWNER_NONE;

	FOR_ALL_INDUSTRIES(i) {
		if (i->xy != 0) UpdateIndustryStatistics(i);
	}

	/* 3% chance that we start a new industry */
	if (CHANCE16(3, 100)) {
		MaybeNewIndustry(Random());
	} else if (!_patches.smooth_economy && _total_industries > 0) {
		i = GetIndustry(RandomRange(_total_industries));
		if (i->xy != 0) ChangeIndustryProduction(i);
	}

	_current_player = old_player;

	// production-change
	_industry_sort_dirty = true;
	InvalidateWindow(WC_INDUSTRY_DIRECTORY, 0);
}


void InitializeIndustries(void)
{
	CleanPool(&_industry_pool);
	AddBlockToPool(&_industry_pool);

	_total_industries = 0;
	_industry_sort_dirty = true;
}

const TileTypeProcs _tile_type_industry_procs = {
	DrawTile_Industry,					/* draw_tile_proc */
	GetSlopeZ_Industry,					/* get_slope_z_proc */
	ClearTile_Industry,					/* clear_tile_proc */
	GetAcceptedCargo_Industry,	/* get_accepted_cargo_proc */
	GetTileDesc_Industry,				/* get_tile_desc_proc */
	GetTileTrackStatus_Industry,/* get_tile_track_status_proc */
	ClickTile_Industry,					/* click_tile_proc */
	AnimateTile_Industry,				/* animate_tile_proc */
	TileLoop_Industry,					/* tile_loop_proc */
	ChangeTileOwner_Industry,		/* change_tile_owner_proc */
	GetProducedCargo_Industry,  /* get_produced_cargo_proc */
	NULL,												/* vehicle_enter_tile_proc */
	GetSlopeTileh_Industry,			/* get_slope_tileh_proc */
};

static const SaveLoad _industry_desc[] = {
	SLE_CONDVAR(Industry, xy,					SLE_FILE_U16 | SLE_VAR_U32, 0, 5),
	SLE_CONDVAR(Industry, xy,					SLE_UINT32, 6, SL_MAX_VERSION),
	SLE_VAR(Industry,width,						SLE_UINT8),
	SLE_VAR(Industry,height,					SLE_UINT8),
	SLE_REF(Industry,town,						REF_TOWN),
	SLE_ARR(Industry,produced_cargo,  SLE_UINT8, 2),
	SLE_ARR(Industry,cargo_waiting,   SLE_UINT16, 2),
	SLE_ARR(Industry,production_rate, SLE_UINT8, 2),
	SLE_ARR(Industry,accepts_cargo,		SLE_UINT8, 3),
	SLE_VAR(Industry,prod_level,			SLE_UINT8),
	SLE_ARR(Industry,last_mo_production,SLE_UINT16, 2),
	SLE_ARR(Industry,last_mo_transported,SLE_UINT16, 2),
	SLE_ARR(Industry,pct_transported,SLE_UINT8, 2),
	SLE_ARR(Industry,total_production,SLE_UINT16, 2),
	SLE_ARR(Industry,total_transported,SLE_UINT16, 2),

	SLE_VAR(Industry,counter,					SLE_UINT16),

	SLE_VAR(Industry,type,						SLE_UINT8),
	SLE_VAR(Industry,owner,						SLE_UINT8),
	SLE_VAR(Industry,color_map,				SLE_UINT8),
	SLE_VAR(Industry,last_prod_year,	SLE_UINT8),
	SLE_VAR(Industry,was_cargo_delivered,SLE_UINT8),

	// reserve extra space in savegame here. (currently 32 bytes)
	SLE_CONDNULL(32, 2, SL_MAX_VERSION),

	SLE_END()
};

static void Save_INDY(void)
{
	Industry *ind;

	// Write the vehicles
	FOR_ALL_INDUSTRIES(ind) {
		if (ind->xy != 0) {
			SlSetArrayIndex(ind->index);
			SlObject(ind, _industry_desc);
		}
	}
}

static void Load_INDY(void)
{
	int index;

	_total_industries = 0;

	while ((index = SlIterateArray()) != -1) {
		Industry *i;

		if (!AddBlockIfNeeded(&_industry_pool, index))
			error("Industries: failed loading savegame: too many industries");

		i = GetIndustry(index);
		SlObject(i, _industry_desc);

		if (index > _total_industries) _total_industries = index;
	}
}

const ChunkHandler _industry_chunk_handlers[] = {
	{ 'INDY', Save_INDY, Load_INDY, CH_ARRAY | CH_LAST},
};