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/* $Id$ */

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/** @file newgrf_industrytiles.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "functions.h"

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#include "variables.h"

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#include "debug.h"

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#include "viewport.h"

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#include "landscape.h"

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#include "newgrf.h"

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#include "industry.h"

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#include "newgrf_commons.h"

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#include "newgrf_spritegroup.h"

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#include "newgrf_callbacks.h"

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#include "newgrf_industries.h"

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#include "newgrf_industrytiles.h"

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#include "newgrf_text.h"

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#include "industry_map.h"

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#include "clear_map.h"

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#include "table/sprites.h"

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#include "table/strings.h"

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#include "sprite.h"

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/**

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 * Based on newhouses equivalent, but adapted for newindustries

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 * @param parameter from callback.  It's in fact a pair of coordinates

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 * @param tile TileIndex from which the callback was initiated

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 * @param index of the industry been queried for

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 * @return a construction of bits obeying the newgrf format

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 */

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uint32 GetNearbyIndustryTileInformation(byte parameter, TileIndex tile, IndustryID index)

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{

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	byte tile_type;

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	bool is_same_industry;

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	if (parameter != 0) tile = GetNearbyTile(parameter, tile); // only perform if it is required

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	is_same_industry = (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == index);

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	tile_type = GetTerrainType(tile) << 2 | (IsTileType(tile, MP_WATER) ? 1 : 0) << 1 | (is_same_industry ? 1 : 0);

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	return GetTileType(tile) << 24 | (TileHeight(tile) * 8) << 16 | tile_type << 8 | GetTileSlope(tile, NULL);

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}

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/** This is the position of the tile relative to the northernmost tile of the industry.

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 * Format: 00yxYYXX

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 * Variable  Content

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 * x         the x offset from the northernmost tile

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 * XX        same, but stored in a byte instead of a nibble

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 * y         the y offset from the northernmost tile

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 * YY        same, but stored in a byte instead of a nibble

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 * @param tile TileIndex of the tile to evaluate

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 * @param ind_tile northernmost tile of the industry

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 */

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static uint32 GetRelativePosition(TileIndex tile, TileIndex ind_tile)

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{

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	byte x = TileX(tile) - TileX(ind_tile);

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	byte y = TileY(tile) - TileY(ind_tile);

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	return ((y & 0xF) << 20) | ((x & 0xF) << 16) | (y << 8) | x;

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}

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static uint32 IndustryTileGetVariable(const ResolverObject *object, byte variable, byte parameter, bool *available)

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{

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	const Industry *inds = object->u.industry.ind;

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	TileIndex tile       = object->u.industry.tile;

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	if (object->scope == VSG_SCOPE_PARENT) {

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		return IndustryGetVariable(object, variable, parameter, available);

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	}

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	switch (variable) {

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		 /* Construction state of the tile: a value between 0 and 3 */

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		case 0x40 : return (IsTileType(tile, MP_INDUSTRY)) ? GetIndustryConstructionStage(tile) : 0;

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		case 0x41 : return GetTerrainType(tile);

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		/* Current town zone of the tile in the nearest town */

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		case 0x42 : return GetTownRadiusGroup(ClosestTownFromTile(tile, (uint)-1), tile);

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		/* Relative position */

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		case 0x43 : return GetRelativePosition(tile, inds->xy);

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		/* Animation frame. Like house variable 46 but can contain anything 0..FF. */

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		case 0x44 : return (IsTileType(tile, MP_INDUSTRY)) ? GetIndustryAnimationState(tile) : 0;

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		/* Land info of nearby tiles */

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		case 0x60 : return GetNearbyIndustryTileInformation(parameter, tile, inds == NULL ? (IndustryID)INVALID_INDUSTRY : inds->index);

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		/* Animation stage of nearby tiles */

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		case 0x61 : {

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			tile = GetNearbyTile(parameter, tile);

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			if (IsTileType(tile, MP_INDUSTRY) && GetIndustryByTile(tile) == inds) {

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				return GetIndustryAnimationState(tile);

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			}

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			return 0xFFFFFFFF;

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		}

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		/* Get industry tile ID at offset */

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		case 0x62 : return GetIndustryIDAtOffset(GetNearbyTile(parameter, tile), tile, inds);

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	}

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	DEBUG(grf, 1, "Unhandled industry tile property 0x%X", variable);

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	*available = false;

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	return (uint32)-1;

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}

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static const SpriteGroup *IndustryTileResolveReal(const ResolverObject *object, const SpriteGroup *group)

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{

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	/* IndustryTile do not have 'real' groups.  Or do they?? */

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	return NULL;

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}

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uint32 IndustryTileGetRandomBits(const ResolverObject *object)

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{

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	const TileIndex tile = object->u.industry.tile;

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	return (tile == INVALID_TILE || !IsTileType(tile, MP_INDUSTRY)) ? 0 : GetIndustryRandomBits(tile);

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}

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uint32 IndustryTileGetTriggers(const ResolverObject *object)

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{

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	const TileIndex tile = object->u.industry.tile;

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	return (tile == INVALID_TILE || !IsTileType(tile, MP_INDUSTRY)) ? 0 : GetIndustryTriggers(tile);

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}

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void IndustryTileSetTriggers(const ResolverObject *object, int triggers)

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{

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	const TileIndex tile = object->u.industry.tile;

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	if (IsTileType(tile, MP_INDUSTRY)) SetIndustryTriggers(tile, triggers);

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}

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static void NewIndustryTileResolver(ResolverObject *res, IndustryGfx gfx, TileIndex tile, Industry *indus)

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{

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	res->GetRandomBits = IndustryTileGetRandomBits;

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	res->GetTriggers   = IndustryTileGetTriggers;

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	res->SetTriggers   = IndustryTileSetTriggers;

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	res->GetVariable   = IndustryTileGetVariable;

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	res->ResolveReal   = IndustryTileResolveReal;

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	res->u.industry.tile = tile;

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	res->u.industry.ind  = indus;

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	res->u.industry.gfx  = gfx;

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	res->callback        = CBID_NO_CALLBACK;

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	res->callback_param1 = 0;

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	res->callback_param2 = 0;

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	res->last_value      = 0;

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	res->trigger         = 0;

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	res->reseed          = 0;

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}

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void IndustryDrawTileLayout(const TileInfo *ti, const SpriteGroup *group, byte rnd_color, byte stage, IndustryGfx gfx)

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{

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	const DrawTileSprites *dts = group->g.layout.dts;

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	const DrawTileSeqStruct *dtss;

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	SpriteID image = dts->ground_sprite;

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	SpriteID pal   = dts->ground_pal;

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	if (GB(image, 0, SPRITE_WIDTH) != 0) DrawGroundSprite(image, pal);

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	foreach_draw_tile_seq(dtss, dts->seq) {

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		if (GB(dtss->image, 0, SPRITE_WIDTH) == 0) continue;

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		image = dtss->image + stage;

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		pal   = dtss->pal;

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		if (HASBIT(image, PALETTE_MODIFIER_COLOR)) {

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			pal = GENERAL_SPRITE_COLOR(rnd_color);

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		} else {

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			pal = PAL_NONE;

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		}

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		if ((byte)dtss->delta_z != 0x80) {

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			AddSortableSpriteToDraw(

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				image, pal,

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				ti->x + dtss->delta_x, ti->y + dtss->delta_y,

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				dtss->size_x, dtss->size_y,

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				dtss->size_z, ti->z + dtss->delta_z,

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				!HASBIT(image, SPRITE_MODIFIER_OPAQUE) && HASBIT(_transparent_opt, TO_INDUSTRIES)

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			);

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		} else {

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			AddChildSpriteScreen(image, pal, dtss->delta_x, dtss->delta_y);

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		}

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	}

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}

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uint16 GetIndustryTileCallback(CallbackID callback, uint32 param1, uint32 param2, IndustryGfx gfx_id, Industry *industry, TileIndex tile)

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{

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	ResolverObject object;

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	const SpriteGroup *group;

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	NewIndustryTileResolver(&object, gfx_id, tile, industry);

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	object.callback = callback;

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	object.callback_param1 = param1;

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	object.callback_param2 = param2;

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	group = Resolve(GetIndustryTileSpec(gfx_id)->grf_prop.spritegroup, &object);

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	if (group == NULL || group->type != SGT_CALLBACK) return CALLBACK_FAILED;

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	return group->g.callback.result;

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}

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bool DrawNewIndustryTile(TileInfo *ti, Industry *i, IndustryGfx gfx, const IndustryTileSpec *inds)

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{

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	const SpriteGroup *group;

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	ResolverObject object;

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	if (ti->tileh != SLOPE_FLAT) {

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		bool draw_old_one = true;

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		if (HASBIT(inds->callback_flags, CBM_INDT_DRAW_FOUNDATIONS)) {

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			/* Called to determine the type (if any) of foundation to draw for industry tile */

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			uint32 callback_res = GetIndustryTileCallback(CBID_INDUSTRY_DRAW_FOUNDATIONS, 0, 0, gfx, i, ti->tile);

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			draw_old_one = callback_res != 0;

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		}

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		if (draw_old_one) DrawFoundation(ti, FOUNDATION_LEVELED);

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	}

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	NewIndustryTileResolver(&object, gfx, ti->tile, i);

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	group = Resolve(inds->grf_prop.spritegroup, &object);

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	if (group == NULL || group->type != SGT_TILELAYOUT) {

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		return false;

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	} else {

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		/* Limit the building stage to the number of stages supplied. */

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		byte stage = GetIndustryConstructionStage(ti->tile);

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		stage = clamp(stage - 4 + group->g.layout.num_sprites, 0, group->g.layout.num_sprites - 1);

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		IndustryDrawTileLayout(ti, group, i->random_color, stage, gfx);

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		return true;

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	}

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}

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bool PerformIndustryTileSlopeCheck(TileIndex tile, const IndustryTileSpec *its, IndustryType type, IndustryGfx gfx)

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{

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	Industry ind;

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	ind.xy = 0;

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	ind.width = 0;

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	ind.type = type;

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	uint16 callback_res = GetIndustryTileCallback(CBID_INDTILE_SHAPE_CHECK, 0, 0, gfx, &ind, tile);

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	if (its->grf_prop.grffile->grf_version < 7) {

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		return callback_res != 0;

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	}

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	if (callback_res == CALLBACK_FAILED) return false;

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	switch (callback_res) {

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		case 0x400: return true;

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		case 0x401: _error_message = STR_0239_SITE_UNSUITABLE;                 return false;

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		case 0x402: _error_message = STR_0317_CAN_ONLY_BE_BUILT_IN_RAINFOREST; return false;

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		case 0x403: _error_message = STR_0318_CAN_ONLY_BE_BUILT_IN_DESERT;     return false;

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		default: _error_message = GetGRFStringID(its->grf_prop.grffile->grfid, 0xD000 + callback_res); return false;

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	}

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}

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void AnimateNewIndustryTile(TileIndex tile)

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{

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	Industry *ind = GetIndustryByTile(tile);

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	IndustryGfx gfx = GetIndustryGfx(tile);

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	const IndustryTileSpec *itspec = GetIndustryTileSpec(gfx);

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	byte animation_speed = itspec->animation_speed;

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	if (HASBIT(itspec->callback_flags, CBM_INDT_ANIM_SPEED)) {

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		uint16 callback_res = GetIndustryTileCallback(CBID_INDTILE_ANIMATION_SPEED, 0, 0, gfx, ind, tile);

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		if (callback_res != CALLBACK_FAILED) animation_speed = clamp(callback_res & 0xFF, 0, 16);

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	}

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	/* An animation speed of 2 means the animation frame changes 4 ticks, and

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	 * increasing this value by one doubles the wait. 0 is the minimum value

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	 * allowed for animation_speed, which corresponds to 30ms, and 16 is the

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	 * maximum, corresponding to around 33 minutes. */

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	if ((_tick_counter % (1 << animation_speed)) != 0) return;

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	bool frame_set_by_callback = false;

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	byte frame = GetIndustryAnimationState(tile);

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	uint16 num_frames = GB(itspec->animation_info, 0, 8) + 1;

   278

   279

	if (HASBIT(itspec->callback_flags, CBM_INDT_ANIM_NEXT_FRAME)) {

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		uint16 callback_res = GetIndustryTileCallback(CBID_INDTILE_ANIM_NEXT_FRAME, HASBIT(itspec->animation_special_flags, 0) ? Random() : 0, 0, gfx, ind, tile);

   281

   282

		if (callback_res != CALLBACK_FAILED) {

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			frame_set_by_callback = true;

   284

   285

			switch (callback_res & 0xFF) {

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				case 0xFF:

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					DeleteAnimatedTile(tile);

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					break;

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				case 0xFE:

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					/* Carry on as normal. */

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					frame_set_by_callback = false;

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					break;

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				default:

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					frame = callback_res & 0xFF;

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					break;

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			}

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		}

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	}

   299

   300

	if (!frame_set_by_callback) {

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		if (frame < num_frames) {

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			frame++;

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		} else if (frame == num_frames && GB(itspec->animation_info, 8, 8) == 1) {

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			/* This animation loops, so start again from the beginning */

   305

			frame = 0;

   306

		} else {

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			/* This animation doesn't loop, so stay here */

   308

			DeleteAnimatedTile(tile);

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		}

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	}

   311

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	SetIndustryAnimationState(tile, frame);

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	MarkTileDirtyByTile(tile);

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}

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static void ChangeIndustryTileAnimationFrame(TileIndex tile, IndustryAnimationTrigger iat, uint32 random_bits, IndustryGfx gfx, Industry *ind)

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{

   318

	uint16 callback_res = GetIndustryTileCallback(CBID_INDTILE_ANIM_START_STOP, random_bits, iat, gfx, ind, tile);

   319

	if (callback_res == CALLBACK_FAILED) return;

   320

   321

	switch (callback_res & 0xFF) {

   322

		case 0xFD: /* Do nothing. */         break;

   323

		case 0xFE: AddAnimatedTile(tile);    break;

   324

		case 0xFF: DeleteAnimatedTile(tile); break;

   325

		default:

   326

			SetIndustryAnimationState(tile, callback_res & 0xFF);

   327

			AddAnimatedTile(tile);

   328

			break;

   329

	}

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}

   331

   332

bool StartStopIndustryTileAnimation(TileIndex tile, IndustryAnimationTrigger iat, uint32 random)

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{

   334

	IndustryGfx gfx = GetIndustryGfx(tile);

   335

	const IndustryTileSpec *itspec = GetIndustryTileSpec(gfx);

   336

   337

	if (!HASBIT(itspec->animation_triggers, iat)) return false;

   338

   339

	Industry *ind = GetIndustryByTile(tile);

   340

	ChangeIndustryTileAnimationFrame(tile, iat, random, gfx, ind);

   341

	return true;

   342

}

   343

   344

bool StartStopIndustryTileAnimation(const Industry *ind, IndustryAnimationTrigger iat)

   345

{

   346

	bool ret = true;

   347

	uint32 random = Random();

   348

	BEGIN_TILE_LOOP(tile, ind->width, ind->height, ind->xy)

   349

		if (IsTileType(tile, MP_INDUSTRY) && GetIndustryIndex(tile) == ind->index) {

   350

			ret &= StartStopIndustryTileAnimation(tile, iat, random);

   351

			SB(random, 0, 16, Random());

   352

		}

   353

	END_TILE_LOOP(tile, ind->width, ind->height, ind->xy)

   354

   355

	return ret;

   356

}