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/* $Id$ */

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/** @file subsidy_gui.cpp GUI for subsidies. */

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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 "gui.h"

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#include "table/strings.h"

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struct SubsidyListWindow : Window {

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	SubsidyListWindow(const WindowDesc *desc, WindowNumber window_number) : Window(desc, window_number)

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	{

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		this->FindWindowPlacementAndResize(desc);

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	}

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	virtual void OnClick(Point pt, int widget)

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	{

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		if (widget != 3) return;

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		int y = pt.y - 25;

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		if (y < 0) return;

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		uint num = 0;

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		for (const Subsidy *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) {

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					this->HandleClick(s);

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					return;

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				}

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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; // "None"

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			if (y < 0) return;

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		}

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		y -= 11; // "Services already subsidised:"

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		if (y < 0) return;

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		for (const Subsidy *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) {

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					this->HandleClick(s);

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					return;

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				}

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			}

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		}

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	}

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	void HandleClick(const Subsidy *s)

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	{

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

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		TileIndex xy;

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

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		uint 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 (_ctrl_pressed || !ScrollMainWindowToTile(xy)) {

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			if (_ctrl_pressed) ShowExtraViewPortWindow(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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			if (_ctrl_pressed) {

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				ShowExtraViewPortWindow(xy);

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			} else {

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				ScrollMainWindowToTile(xy);

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			}

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		}

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	}

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	virtual void OnPaint()

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	{

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		YearMonthDay ymd;

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		const Subsidy *s;

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		this->DrawWidgets();

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		ConvertDateToYMD(_date, &ymd);

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

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		int y = 15;

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		int x = 1;

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		/* Section for drawing the offered subisidies */

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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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		uint 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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				/* Displays the two offered towns */

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				SetupSubsidyDecodeParam(s, 1);

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

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				if (width - x2 > 10) {

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					/* Displays the deadline before voiding the proposal */

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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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				}

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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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		/* Section for drawing the already granted subisidies */

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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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				SetDParam(3, GetStation(s->to)->owner);

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				/* Displays the two connected stations */

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

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				/* Displays the date where the granted subsidy will end */

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				if ((xt > 3) && (width - xt) > 9 ) { // do not draw if previous drawing failed or if it will overlap on scrollbar

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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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};

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static const Widget _subsidies_list_widgets[] = {

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

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

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

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

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{  WWT_SCROLLBAR, RESIZE_LRB,    COLOUR_BROWN, 308, 319,  14, 114, 0x0,                STR_0190_SCROLL_BAR_SCROLLS_LIST},

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{  WWT_RESIZEBOX, RESIZE_LRTB,   COLOUR_BROWN, 308, 319, 115, 126, 0x0,                STR_RESIZE_BUTTON},

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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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};

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void ShowSubsidiesList()

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{

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	AllocateWindowDescFront<SubsidyListWindow>(&_subsidies_list_desc, 0);

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}