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/* $Id$ */

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/** @file town_cmd.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "tile_cmd.h"

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#include "debug.h"

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#include "road_map.h"

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#include "road_internal.h" /* Cleaning up road bits */

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#include "landscape.h"

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#include "town_map.h"

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#include "tunnel_map.h"

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#include "viewport_func.h"

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#include "town.h"

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#include "command_func.h"

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#include "industry.h"

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#include "player_base.h"

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#include "saveload.h"

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#include "gui.h"

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#include "unmovable_map.h"

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#include "water_map.h"

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#include "variables.h"

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#include "bridge.h"

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#include "bridge_map.h"

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#include "genworld.h"

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#include "newgrf.h"

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#include "newgrf_callbacks.h"

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#include "newgrf_house.h"

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#include "newgrf_commons.h"

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#include "newgrf_townname.h"

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#include "misc/autoptr.hpp"

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#include "autoslope.h"

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#include "waypoint.h"

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#include "transparency.h"

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#include "tunnelbridge_map.h"

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#include "strings_func.h"

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#include "window_func.h"

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#include "string_func.h"

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#include "table/strings.h"

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#include "table/sprites.h"

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#include "table/town_land.h"

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    49

uint _total_towns;

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HouseSpec _house_specs[HOUSE_MAX];

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    52

bool _town_sort_dirty;

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byte _town_sort_order;

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const Town **_town_sort;

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    56

Town *_cleared_town;

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int _cleared_town_rating;

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    59

/* Initialize the town-pool */

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DEFINE_OLD_POOL_GENERIC(Town, Town)

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    62

Town::Town(TileIndex tile)

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{

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	if (tile != 0) _total_towns++;

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	this->xy = tile;

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}

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    68

Town::~Town()

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{

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	free(this->name);

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    72

	if (CleaningPool()) return;

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    74

	Industry *i;

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    76

	/* Delete town authority window

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	 * and remove from list of sorted towns */

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	DeleteWindowById(WC_TOWN_VIEW, this->index);

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	_town_sort_dirty = true;

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	_total_towns--;

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    82

	/* Delete all industries belonging to the town */

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	FOR_ALL_INDUSTRIES(i) if (i->town == this) delete i;

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    85

	/* Go through all tiles and delete those belonging to the town */

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	for (TileIndex tile = 0; tile < MapSize(); ++tile) {

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		switch (GetTileType(tile)) {

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			case MP_HOUSE:

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				if (GetTownByTile(tile) == this) DoCommand(tile, 0, 0, DC_EXEC, CMD_LANDSCAPE_CLEAR);

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				break;

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			case MP_ROAD:

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			case MP_TUNNELBRIDGE:

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				if (IsTileOwner(tile, OWNER_TOWN) &&

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						ClosestTownFromTile(tile, (uint)-1) == this)

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

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				break;

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    99

			default:

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				break;

   101

		}

   102

	}

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   104

	DeleteSubsidyWithTown(this->index);

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   106

	MarkWholeScreenDirty();

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   108

	this->xy = 0;

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}

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   128

// Local

   129

static int _grow_town_result;

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   131

/* Describe the possible states */

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enum TownGrowthResult {

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	GROWTH_SUCCEED         = -1,

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	GROWTH_SEARCH_STOPPED  =  0

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//	GROWTH_SEARCH_RUNNING >=  1

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};

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   138

static bool BuildTownHouse(Town *t, TileIndex tile);

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   140

static void TownDrawHouseLift(const TileInfo *ti)

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{

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	AddChildSpriteScreen(SPR_LIFT, PAL_NONE, 14, 60 - GetLiftPosition(ti->tile));

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}

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   145

typedef void TownDrawTileProc(const TileInfo *ti);

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	TownDrawHouseLift

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};

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   150

/**

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 * Return a random direction

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 *

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 * @return a random direction

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 */

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static inline DiagDirection RandomDiagDir()

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{

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	return (DiagDirection)(3 & Random());

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}

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   160

/**

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 * House Tile drawing handler.

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 * Part of the tile loop process

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 * @param ti TileInfo of the tile to draw

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 */

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static void DrawTile_Town(TileInfo *ti)

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{

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	HouseID house_id = GetHouseType(ti->tile);

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	if (house_id >= NEW_HOUSE_OFFSET) {

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		/* Houses don't necessarily need new graphics. If they don't have a

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		 * spritegroup associated with them, then the sprite for the substitute

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		 * house id is drawn instead. */

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		if (GetHouseSpecs(house_id)->spritegroup != NULL) {

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			DrawNewHouseTile(ti, house_id);

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			return;

   176

		} else {

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			house_id = GetHouseSpecs(house_id)->substitute_id;

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		}

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	}

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	/* Retrieve pointer to the draw town tile struct */

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   184

	if (ti->tileh != SLOPE_FLAT) DrawFoundation(ti, FOUNDATION_LEVELED);

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	/* Add a house on top of the ground? */

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	if (image != 0) {

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		AddSortableSpriteToDraw(image, dcts->building.pal,

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			ti->x + dcts->subtile_x,

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			ti->y + dcts->subtile_y,

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			dcts->width,

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			dcts->height,

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			dcts->dz,

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			ti->z,

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			IsTransparencySet(TO_HOUSES)

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		);

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   204

		if (IsTransparencySet(TO_HOUSES)) return;

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	}

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   207

	{

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		int proc = dcts->draw_proc - 1;

   209

   210

		if (proc >= 0) _town_draw_tile_procs[proc](ti);

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	}

   212

}

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static uint GetSlopeZ_Town(TileIndex tile, uint x, uint y)

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{

   216

	return GetTileMaxZ(tile);

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}

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static Foundation GetFoundation_Town(TileIndex tile, Slope tileh)

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{

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	return FlatteningFoundation(tileh);

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}

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/**

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 * Animate a tile for a town

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 * Only certain houses can be animated

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 * The newhouses animation superseeds regular ones

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 * @param tile TileIndex of the house to animate

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 */

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static void AnimateTile_Town(TileIndex tile)

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{

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	if (GetHouseType(tile) >= NEW_HOUSE_OFFSET) {

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		AnimateNewHouseTile(tile);

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		return;

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	}

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	if (_tick_counter & 3) return;

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	/* If the house is not one with a lift anymore, then stop this animating.

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	 * Not exactly sure when this happens, but probably when a house changes.

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	 * Before this was just a return...so it'd leak animated tiles..

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	 * That bug seems to have been here since day 1?? */

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	if (!(GetHouseSpecs(GetHouseType(tile))->building_flags & BUILDING_IS_ANIMATED)) {

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		DeleteAnimatedTile(tile);

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		return;

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	}

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	if (!LiftHasDestination(tile)) {

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		 *  the height of 2 'normal' floors.

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		do {

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   259

		SetLiftDestination(tile, i);

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	}

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	pos += (pos < dest) ? 1 : -1;

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	SetLiftPosition(tile, pos);

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   267

	if (pos == dest) HaltLift(tile);

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	MarkTileDirtyByTile(tile);

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}

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/**

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 * Determines if a town is close to a tile

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 * @param tile TileIndex of the tile to query

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 * @param dist maximum distance to be accepted

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 * @returns true if the tile correspond to the distance criteria

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 */

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static bool IsCloseToTown(TileIndex tile, uint dist)

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{

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   282

	FOR_ALL_TOWNS(t) {

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		if (DistanceManhattan(tile, t->xy) < dist) return true;

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	}

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	return false;

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}

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/**

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 * Marks the town sign as needing a repaint.

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 *

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 * This function marks the area of the sign of a town as dirty for repaint.

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 *

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 * @param t Town requesting town sign for repaint

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 * @ingroup dirty

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 */

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static void MarkTownSignDirty(Town *t)

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{

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	MarkAllViewportsDirty(

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		t->sign.left - 6,

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		t->sign.top - 3,

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		t->sign.left + t->sign.width_1 * 4 + 12,

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		t->sign.top + 45

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	);

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}

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/**

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 * Resize the sign(label) of the town after changes in

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 * population (creation or growth or else)

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 * @param t Town to update

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 */

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void UpdateTownVirtCoord(Town *t)

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{

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	MarkTownSignDirty(t);

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	SetDParam(0, t->index);

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	SetDParam(1, t->population);

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	UpdateViewportSignPos(&t->sign, pt.x, pt.y - 24,

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		_patches.population_in_label ? STR_TOWN_LABEL_POP : STR_TOWN_LABEL);

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	MarkTownSignDirty(t);

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}

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/** Update the virtual coords needed to draw the town sign for all towns. */

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void UpdateAllTownVirtCoords()

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{

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	Town *t;

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	FOR_ALL_TOWNS(t) {

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		UpdateTownVirtCoord(t);

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	}

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}

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/**

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 * Change the towns population

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 * @param t Town which polulation has changed

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 * @param mod polulation change (can be positive or negative)

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 */

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static void ChangePopulation(Town *t, int mod)

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{

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	t->population += mod;

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	InvalidateWindow(WC_TOWN_VIEW, t->index);

   340

	UpdateTownVirtCoord(t);

   341

   342

	if (_town_sort_order & 2) _town_sort_dirty = true;

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}

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   345

/**

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 * Determines the world population

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 * Basically, count population of all towns, one by one

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 * @return uint32 the calculated population of the world

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 */

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uint32 GetWorldPopulation()

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{

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	FOR_ALL_TOWNS(t) pop += t->population;

   356

	return pop;

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}

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   359

/**

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 * Helper function for house completion stages progression

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 * @param tile TileIndex of the house (or parts of it) to "grow"

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 */

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static void MakeSingleHouseBigger(TileIndex tile)

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{

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	assert(IsTileType(tile, MP_HOUSE));

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   367

	/* means it is completed, get out. */

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	if (LiftHasDestination(tile)) return;

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   370

	/* progress in construction stages */

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	IncHouseConstructionTick(tile);

   372

	if (GetHouseConstructionTick(tile) != 0) return;

   373

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	/* Check and/or  */

   375

	if (HasBit(GetHouseSpecs(GetHouseType(tile))->callback_mask, CBM_HOUSE_CONSTRUCTION_STATE_CHANGE)) {

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		uint16 callback_res = GetHouseCallback(CBID_HOUSE_CONSTRUCTION_STATE_CHANGE, 0, 0, GetHouseType(tile), GetTownByTile(tile), tile);

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		if (callback_res != CALLBACK_FAILED) ChangeHouseAnimationFrame(tile, callback_res);

   378

	}

   379

   380

	if (IsHouseCompleted(tile)) {

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		/* Now that construction is complete, we can add the population of the

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		 * building to the town. */

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		ChangePopulation(GetTownByTile(tile), GetHouseSpecs(GetHouseType(tile))->population);

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	}

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	MarkTileDirtyByTile(tile);

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}

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/** Make the house advances in its construction stages until completion

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 * @param tile TileIndex of house

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 */

   391

static void MakeTownHouseBigger(TileIndex tile)

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{

   393

	uint flags = GetHouseSpecs(GetHouseType(tile))->building_flags;

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	if (flags & BUILDING_HAS_1_TILE)  MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 0));

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	if (flags & BUILDING_2_TILES_Y)   MakeSingleHouseBigger(TILE_ADDXY(tile, 0, 1));

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	if (flags & BUILDING_2_TILES_X)   MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 0));

   397

	if (flags & BUILDING_HAS_4_TILES) MakeSingleHouseBigger(TILE_ADDXY(tile, 1, 1));

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}

   399

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/**

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 * Periodic tic handler for houses and town

   402

 * @param tile been asked to do its stuff

   403

 */

   404

static void TileLoop_Town(TileIndex tile)

   405

{

   406

	HouseID house_id = GetHouseType(tile);

   407

   408

	/* NewHouseTileLoop returns false if Callback 21 succeeded, i.e. the house

   409

	 * doesn't exist any more, so don't continue here. */

   410

	if (house_id >= NEW_HOUSE_OFFSET && !NewHouseTileLoop(tile)) return;

   411

   412

	if (!IsHouseCompleted(tile)) {

   413

		/* Construction is not completed. See if we can go further in construction*/

   414

		MakeTownHouseBigger(tile);

   415

		return;

   416

	}

   417

   420

	/* If the lift has a destination, it is already an animated tile. */

   421

	if ((hs->building_flags & BUILDING_IS_ANIMATED) &&

   422

			house_id < NEW_HOUSE_OFFSET &&

   423

			!LiftHasDestination(tile) &&

   425

		AddAnimatedTile(tile);

   430

   431

	if (HasBit(hs->callback_mask, CBM_HOUSE_PRODUCE_CARGO)) {

   432

		for (uint i = 0; i < 256; i++) {

   433

			uint16 callback = GetHouseCallback(CBID_HOUSE_PRODUCE_CARGO, i, r, house_id, t, tile);

   434

   435

			if (callback == CALLBACK_FAILED || callback == CALLBACK_HOUSEPRODCARGO_END) break;

   436

   437

			CargoID cargo = GetCargoTranslation(GB(callback, 8, 7), hs->grffile);

   438

			if (cargo == CT_INVALID) continue;

   439

   440

			uint amt = GB(callback, 0, 8);

   441

			uint moved = MoveGoodsToStation(tile, 1, 1, cargo, amt);

   442

   443

			const CargoSpec *cs = GetCargo(cargo);

   444

			switch (cs->town_effect) {

   445

				case TE_PASSENGERS:

   446

					t->new_max_pass += amt;

   447

					t->new_act_pass += moved;

   448

					break;

   449

   450

				case TE_MAIL:

   451

					t->new_max_mail += amt;

   452

					t->new_act_mail += moved;

   453

					break;

   454

   455

				default:

   456

					break;

   457

			}

   458

		}

   459

	} else {

   460

		if (GB(r, 0, 8) < hs->population) {

   461

			uint amt = GB(r, 0, 8) / 8 + 1;

   462

   463

			if (_economy.fluct <= 0) amt = (amt + 1) >> 1;

   464

			t->new_max_pass += amt;

   466

		}

   467

   468

		if (GB(r, 8, 8) < hs->mail_generation) {

   469

			uint amt = GB(r, 8, 8) / 8 + 1;

   470

   471

			if (_economy.fluct <= 0) amt = (amt + 1) >> 1;

   472

			t->new_max_mail += amt;

   474

		}

   475

	}

   476

   477

	_current_player = OWNER_TOWN;

   478

   479

	if (hs->building_flags & BUILDING_HAS_1_TILE &&

   480

			HasBit(t->flags12, TOWN_IS_FUNDED) &&

   481

			CanDeleteHouse(tile) &&

   482

			max(_cur_year - GetHouseConstructionYear(tile), 0) >= hs->minimum_life &&

   483

			--t->time_until_rebuild == 0) {

   484

		t->time_until_rebuild = GB(r, 16, 8) + 192;

   485

   486

		ClearTownHouse(t, tile);

   487

   488

		/* Rebuild with another house? */