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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 "table/strings.h"

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#include "strings.h"

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#include "functions.h"

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#include "window.h"

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#include "station.h"

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#include "industry.h"

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#include "town.h"

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#include "player.h"

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#include "gfx.h"

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#include "economy.h"

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#include "variables.h"

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#include "date.h"

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#include "cargotype.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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	y = 15;

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	x = 1;

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

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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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		y += 10;

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	}

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

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			y += 10;

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			num++;

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		}

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	}

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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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{   WIDGETS_END},

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};

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static const WindowDesc _subsidies_list_desc = {

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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,

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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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}