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/* $Id$ */

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/** @file subsidy_gui.cpp */

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#include "stdafx.h"

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#include "openttd.h"

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#include "station_base.h"

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#include "industry.h"

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#include "town.h"

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#include "economy_func.h"

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#include "variables.h"

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#include "cargotype.h"

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#include "window_gui.h"

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#include "strings_func.h"

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#include "date_func.h"

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#include "viewport_func.h"

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#include "gfx_func.h"

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#include "table/strings.h"

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static void HandleSubsidyClick(int y)

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{

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	const Subsidy *s;

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	uint num;

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	int offs;

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	TileIndex xy;

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	if (y < 0) return;

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	num = 0;

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	for (s = _subsidies; s != endof(_subsidies); s++) {

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		if (s->cargo_type != CT_INVALID && s->age < 12) {

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			y -= 10;

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			if (y < 0) goto handle_click;

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			num++;

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		}

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	}

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	if (num == 0) {

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		y -= 10;

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		if (y < 0) return;

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	}

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	y -= 11;

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	if (y < 0) return;

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	for (s = _subsidies; s != endof(_subsidies); s++) {

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		if (s->cargo_type != CT_INVALID && s->age >= 12) {

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			y -= 10;

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			if (y < 0) goto handle_click;

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		}

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	}

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	return;

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handle_click:

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	TownEffect te = GetCargo(s->cargo_type)->town_effect;

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	/* determine from coordinate for subsidy and try to scroll to it */

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	offs = s->from;

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	if (s->age >= 12) {

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		xy = GetStation(offs)->xy;

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	} else if (te == TE_PASSENGERS || te == TE_MAIL) {

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		xy = GetTown(offs)->xy;

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	} else {

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		xy = GetIndustry(offs)->xy;

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	}

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	if (!ScrollMainWindowToTile(xy)) {

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		/* otherwise determine to coordinate for subsidy and scroll to it */

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		offs = s->to;

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		if (s->age >= 12) {

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			xy = GetStation(offs)->xy;

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		} else if (te == TE_PASSENGERS || te == TE_MAIL || te == TE_GOODS || te == TE_FOOD) {

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			xy = GetTown(offs)->xy;

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		} else {

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			xy = GetIndustry(offs)->xy;

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		}

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		ScrollMainWindowToTile(xy);

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	}

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}

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static void DrawSubsidiesWindow(const Window *w)

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{

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	YearMonthDay ymd;

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	const Subsidy *s;

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	uint num;

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	int x;

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	int y;

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	DrawWindowWidgets(w);

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	ConvertDateToYMD(_date, &ymd);

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	int width = w->width - 13;  // scroll bar = 11 + pixel each side

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	y = 15;

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	x = 1;

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	DrawStringTruncated(x, y, STR_2026_SUBSIDIES_ON_OFFER_FOR, TC_FROMSTRING, width);

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	y += 10;

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	num = 0;

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	for (s = _subsidies; s != endof(_subsidies); s++) {

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		if (s->cargo_type != CT_INVALID && s->age < 12) {

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			int x2;

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			SetupSubsidyDecodeParam(s, 1);

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			x2 = DrawStringTruncated(x + 2, y, STR_2027_FROM_TO, TC_FROMSTRING, width);

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			SetDParam(0, _date - ymd.day + 384 - s->age * 32);

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			DrawStringTruncated(x2, y, STR_2028_BY, TC_FROMSTRING, width - x2);

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			y += 10;

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			num++;

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		}

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	}

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	if (num == 0) {

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		DrawStringTruncated(x + 2, y, STR_202A_NONE, TC_FROMSTRING, width - 2);

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		y += 10;

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	}

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	DrawStringTruncated(x, y + 1, STR_202B_SERVICES_ALREADY_SUBSIDISED, TC_FROMSTRING, width);

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	y += 10;

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	num = 0;

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	for (s = _subsidies; s != endof(_subsidies); s++) {

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		if (s->cargo_type != CT_INVALID && s->age >= 12) {

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			int xt;

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			SetupSubsidyDecodeParam(s, 1);

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			PlayerID player = GetStation(s->to)->owner;

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			SetDParam(3, player);

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			xt = DrawStringTruncated(x + 2, y, STR_202C_FROM_TO, TC_FROMSTRING, width - 2);

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			if ((xt > 3) && (width - xt) > 9 ) { // do not draw if it will get on the scrollbar or if last drawing did nothing

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				SetDParam(0, _date - ymd.day + 768 - s->age * 32);

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				DrawStringTruncated(xt, y, STR_202D_UNTIL, TC_FROMSTRING, width - xt);

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			}

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			y += 10;

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			num++;

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		}

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	}

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	if (num == 0) DrawStringTruncated(x + 2, y, STR_202A_NONE, TC_FROMSTRING, width - 2);

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}

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

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{

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	switch (e->event) {

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		case WE_PAINT: DrawSubsidiesWindow(w); break;

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		case WE_CLICK:

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			switch (e->we.click.widget) {

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				case 3:

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					HandleSubsidyClick(e->we.click.pt.y - 25);

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					break;

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			}

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		break;

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	}

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}

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static const Widget _subsidies_list_widgets[] = {

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{   WWT_CLOSEBOX, RESIZE_NONE,   13,   0,  10,   0,  13, STR_00C5,           STR_018B_CLOSE_WINDOW},

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{    WWT_CAPTION, RESIZE_RIGHT,  13,  11, 307,   0,  13, STR_2025_SUBSIDIES, STR_018C_WINDOW_TITLE_DRAG_THIS},

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{  WWT_STICKYBOX, RESIZE_LR,     13, 308, 319,   0,  13, STR_NULL,           STR_STICKY_BUTTON},

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{      WWT_PANEL, RESIZE_RB,     13,   0, 307,  14, 126, 0x0,                STR_01FD_CLICK_ON_SERVICE_TO_CENTER},

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{  WWT_SCROLLBAR, RESIZE_LRB,    13, 308, 319,  14, 114, 0x0,                STR_0190_SCROLL_BAR_SCROLLS_LIST},  // IDW_SCROLLBAR

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{  WWT_RESIZEBOX, RESIZE_LRTB,   13, 308, 319, 115, 126, 0x0,                STR_RESIZE_BUTTON},                 // IDW_RESIZE

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{   WIDGETS_END},

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};

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static const WindowDesc _subsidies_list_desc = {

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	WDP_AUTO, WDP_AUTO, 320, 127, 320, 127,

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	WC_SUBSIDIES_LIST, WC_NONE,

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	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_STICKY_BUTTON | WDF_RESIZABLE,

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	_subsidies_list_widgets,

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	SubsidiesListWndProc

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};

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void ShowSubsidiesList()

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{

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	AllocateWindowDescFront(&_subsidies_list_desc, 0);

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}