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/* $Id$ */

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/** @file bridge_gui.cpp Graphical user interface for bridge construction */

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#include "stdafx.h"

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#include "openttd.h"

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#include "gui.h"

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#include "window_gui.h"

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#include "command_func.h"

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#include "economy_func.h"

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#include "variables.h"

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#include "bridge.h"

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#include "strings_func.h"

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#include "window_func.h"

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#include "sound_func.h"

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#include "map_func.h"

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#include "viewport_func.h"

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#include "gfx_func.h"

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#include "tunnelbridge.h"

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#include "table/strings.h"

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static struct BridgeData {

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	uint8 last_size;

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	uint count;

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	TileIndex start_tile;

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	TileIndex end_tile;

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	uint32 type; ///< Data type for the bridge. Bit 16,15 = transport type, 14..8 = road/rail pieces, 7..0 = type of bridge

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	BridgeType indexes[MAX_BRIDGES];

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	Money costs[MAX_BRIDGES];

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	BridgeData()

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		: last_size(4)

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		, count(0)

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		{};

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} _bridgedata;

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void CcBuildBridge(bool success, TileIndex tile, uint32 p1, uint32 p2)

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{

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	if (success) SndPlayTileFx(SND_27_BLACKSMITH_ANVIL, tile);

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}

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static void BuildBridge(Window *w, int i)

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{

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	DeleteWindow(w);

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	DoCommandP(_bridgedata.end_tile, _bridgedata.start_tile,

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		_bridgedata.type | _bridgedata.indexes[i], CcBuildBridge,

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		CMD_BUILD_BRIDGE | CMD_MSG(STR_5015_CAN_T_BUILD_BRIDGE_HERE));

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}

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/* Names of the build bridge selection window */

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enum BuildBridgeSelectionWidgets {

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	BBSW_CLOSEBOX = 0,

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	BBSW_CAPTION,

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	BBSW_BRIDGE_LIST,

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	BBSW_SCROLLBAR,

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	BBSW_RESIZEBOX

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};

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static void BuildBridgeWndProc(Window *w, WindowEvent *e)

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{

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	switch (e->event) {

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		case WE_CREATE:

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			w->resize.step_height = 22;

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			w->vscroll.count = _bridgedata.count;

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			if (_bridgedata.last_size <= 4) {

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				w->vscroll.cap = 4;

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			} else {

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				/* Resize the bridge selection window if we used a bigger one the last time */

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				w->vscroll.cap = (w->vscroll.count > _bridgedata.last_size) ? _bridgedata.last_size : w->vscroll.count;

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				ResizeWindow(w, 0, (w->vscroll.cap - 4) * w->resize.step_height);

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				w->widget[BBSW_BRIDGE_LIST].data = (w->vscroll.cap << 8) + 1;

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			}

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			break;

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		case WE_PAINT: {

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			DrawWindowWidgets(w);

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			uint y = 15;

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			for (uint i = 0; (i < w->vscroll.cap) && ((i + w->vscroll.pos) < _bridgedata.count); i++) {

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				const BridgeSpec *b = GetBridgeSpec(_bridgedata.indexes[i + w->vscroll.pos]);

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				SetDParam(2, _bridgedata.costs[i + w->vscroll.pos]);

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				SetDParam(1, b->speed * 10 / 16);

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				SetDParam(0, b->material);

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				DrawSprite(b->sprite, b->pal, 3, y);

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				DrawString(44, y, STR_500D, TC_FROMSTRING);

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				y += w->resize.step_height;

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			}

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			break;

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		}

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		case WE_KEYPRESS: {

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			const uint8 i = e->we.keypress.keycode - '1';

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			if (i < 9 && i < _bridgedata.count) {

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				e->we.keypress.cont = false;

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				BuildBridge(w, i);

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			}

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			break;

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		}

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		case WE_CLICK:

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			if (e->we.click.widget == BBSW_BRIDGE_LIST) {

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				uint ind = ((int)e->we.click.pt.y - 14) / w->resize.step_height;

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				if (ind < w->vscroll.cap) {

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					ind += w->vscroll.pos;

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					if (ind < _bridgedata.count) {

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						BuildBridge(w, ind);

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					}

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				}

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			}

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			break;

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		case WE_RESIZE:

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			w->vscroll.cap += e->we.sizing.diff.y / (int)w->resize.step_height;

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			w->widget[BBSW_BRIDGE_LIST].data = (w->vscroll.cap << 8) + 1;

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			SetVScrollCount(w, _bridgedata.count);

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			_bridgedata.last_size = w->vscroll.cap;

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			break;

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	}

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}

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/* Widget definition for the rail bridge selection window */

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static const Widget _build_bridge_widgets[] = {

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{   WWT_CLOSEBOX,   RESIZE_NONE,  7,   0,  10,   0,  13, STR_00C5,                    STR_018B_CLOSE_WINDOW},            // BBSW_CLOSEBOX

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{    WWT_CAPTION,   RESIZE_NONE,  7,  11, 199,   0,  13, STR_100D_SELECT_RAIL_BRIDGE, STR_018C_WINDOW_TITLE_DRAG_THIS},  // BBSW_CAPTION

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{     WWT_MATRIX, RESIZE_BOTTOM,  7,   0, 187,  14, 101, 0x401,                       STR_101F_BRIDGE_SELECTION_CLICK},  // BBSW_BRIDGE_LIST

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{  WWT_SCROLLBAR, RESIZE_BOTTOM,  7, 188, 199,  14,  89, 0x0,                         STR_0190_SCROLL_BAR_SCROLLS_LIST}, // BBSW_SCROLLBAR

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{  WWT_RESIZEBOX,     RESIZE_TB,  7, 188, 199,  90, 101, 0x0,                         STR_RESIZE_BUTTON},                // BBSW_RESIZEBOX

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{   WIDGETS_END},

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};

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/* Window definition for the rail bridge selection window */

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static const WindowDesc _build_bridge_desc = {

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	WDP_AUTO, WDP_AUTO, 200, 102, 200, 102,

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	WC_BUILD_BRIDGE, WC_BUILD_TOOLBAR,

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	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_RESIZABLE,

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	_build_bridge_widgets,

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	BuildBridgeWndProc

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};

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void ShowBuildBridgeWindow(TileIndex start, TileIndex end, TransportType transport_type, byte bridge_type)

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{

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	DeleteWindowById(WC_BUILD_BRIDGE, 0);

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	_bridgedata.type = (transport_type << 15) | (bridge_type << 8); //prepare the parameter for use only once

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	_bridgedata.start_tile = start;

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	_bridgedata.end_tile = end;

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	/* only query bridge building possibility once, result is the same for all bridges!

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	 * returns CMD_ERROR on failure, and price on success */

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	StringID errmsg = INVALID_STRING_ID;

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	CommandCost ret = DoCommand(end, start, _bridgedata.type, DC_AUTO | DC_QUERY_COST, CMD_BUILD_BRIDGE);

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	uint8 j = 0;

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	if (CmdFailed(ret)) {

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		errmsg = _error_message;

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	} else {

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		/* check which bridges can be built

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		 * get absolute bridge length

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		 * length of the middle parts of the bridge */

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		const uint bridge_len = GetTunnelBridgeLength(start, end);

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		/* total length of bridge */

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		const uint tot_bridgedata_len = CalcBridgeLenCostFactor(bridge_len + 2);

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		/* loop for all bridgetypes */

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		for (BridgeType brd_type = 0; brd_type != MAX_BRIDGES; brd_type++) {

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			if (CheckBridge_Stuff(brd_type, bridge_len)) {

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				/* bridge is accepted, add to list */

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				const BridgeSpec *b = GetBridgeSpec(brd_type);

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				/* Add to terraforming & bulldozing costs the cost of the

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				 * bridge itself (not computed with DC_QUERY_COST) */

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				_bridgedata.costs[j] = ret.GetCost() + (((int64)tot_bridgedata_len * _price.build_bridge * b->price) >> 8);

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				_bridgedata.indexes[j] = brd_type;

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				j++;

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			}

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		}

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		_bridgedata.count = j;

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	}

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	if (j != 0) {

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		Window *w = AllocateWindowDesc(&_build_bridge_desc);

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		/* Change the data, or the caption of the gui. Set it to road or rail, accordingly */

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		w->widget[BBSW_CAPTION].data = (transport_type == TRANSPORT_ROAD) ? STR_1803_SELECT_ROAD_BRIDGE : STR_100D_SELECT_RAIL_BRIDGE;

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	} else {

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		ShowErrorMessage(errmsg, STR_5015_CAN_T_BUILD_BRIDGE_HERE, TileX(end) * TILE_SIZE, TileY(end) * TILE_SIZE);

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	}

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}