/* $Id$ */

/** @file station_gui.cpp The GUI for stations. */

#include "stdafx.h"
#include "openttd.h"
#include "debug.h"
#include "gui.h"
#include "window_gui.h"
#include "textbuf_gui.h"
#include "station_base.h"
#include "player_func.h"
#include "economy_func.h"
#include "town.h"
#include "command_func.h"
#include "variables.h"
#include "vehicle_gui.h"
#include "cargotype.h"
#include "station_gui.h"
#include "station_func.h"
#include "strings_func.h"
#include "core/alloc_func.hpp"
#include "window_func.h"
#include "viewport_func.h"
#include "gfx_func.h"
#include "widgets/dropdown_func.h"
#include "newgrf_cargo.h"
#include "string_func.h"

#include "table/strings.h"
#include "table/sprites.h"

typedef int CDECL StationSortListingTypeFunction(const void*, const void*);

static StationSortListingTypeFunction StationNameSorter;
static StationSortListingTypeFunction StationTypeSorter;
static StationSortListingTypeFunction StationWaitingSorter;
static StationSortListingTypeFunction StationRatingMaxSorter;

bool _station_show_coverage;

/**
 * Draw small boxes of cargo amount and ratings data at the given
 * coordinates. If amount exceeds 576 units, it is shown 'full', same
 * goes for the rating: at above 90% orso (224) it is also 'full'
 *
 * @param x coordinate to draw the box at
 * @param y coordinate to draw the box at
 * @param type Cargo type
 * @param amount Cargo amount
 * @param rating ratings data for that particular cargo
 *
 * @note Each cargo-bar is 16 pixels wide and 6 pixels high
 * @note Each rating 14 pixels wide and 1 pixel high and is 1 pixel below the cargo-bar
 */
static void StationsWndShowStationRating(int x, int y, CargoID type, uint amount, byte rating)
{
	static const uint units_full  = 576; ///< number of units to show station as 'full'
	static const uint rating_full = 224; ///< rating needed so it is shown as 'full'

	const CargoSpec *cs = GetCargo(type);
	if (!cs->IsValid()) return;

	int colour = cs->rating_colour;
	uint w = (minu(amount, units_full) + 5) / 36;

	/* Draw total cargo (limited) on station (fits into 16 pixels) */
	if (w != 0) GfxFillRect(x, y, x + w - 1, y + 6, colour);

	/* Draw a one pixel-wide bar of additional cargo meter, useful
	 * for stations with only a small amount (<=30) */
	if (w == 0) {
		uint rest = amount / 5;
		if (rest != 0) {
			w += x;
			GfxFillRect(w, y + 6 - rest, w, y + 6, colour);
		}
	}

	DrawString(x + 1, y, cs->abbrev, TC_BLACK);

	/* Draw green/red ratings bar (fits into 14 pixels) */
	y += 8;
	GfxFillRect(x + 1, y, x + 14, y, 0xB8);
	rating = minu(rating, rating_full) / 16;
	if (rating != 0) GfxFillRect(x + 1, y, x + rating, y, 0xD0);
}

const StringID _station_sort_listing[] = {
	STR_SORT_BY_DROPDOWN_NAME,
	STR_SORT_BY_FACILITY,
	STR_SORT_BY_WAITING,
	STR_SORT_BY_RATING_MAX,
	INVALID_STRING_ID
};

static char _bufcache[64];
static const Station *_last_station;
static int _internal_sort_order;

static int CDECL StationNameSorter(const void *a, const void *b)
{
	const Station *st1 = *(const Station**)a;
	const Station *st2 = *(const Station**)b;
	char buf1[64];

	SetDParam(0, st1->index);
	GetString(buf1, STR_STATION, lastof(buf1));

	if (st2 != _last_station) {
		_last_station = st2;
		SetDParam(0, st2->index);
		GetString(_bufcache, STR_STATION, lastof(_bufcache));
	}

	int r = strcmp(buf1, _bufcache); // sort by name
	return (_internal_sort_order & 1) ? -r : r;
}

static int CDECL StationTypeSorter(const void *a, const void *b)
{
	const Station *st1 = *(const Station**)a;
	const Station *st2 = *(const Station**)b;
	return (_internal_sort_order & 1) ? st2->facilities - st1->facilities : st1->facilities - st2->facilities;
}

static const uint32 _cargo_filter_max = UINT32_MAX;
static uint32 _cargo_filter = _cargo_filter_max;

static int CDECL StationWaitingSorter(const void *a, const void *b)
{
	const Station *st1 = *(const Station**)a;
	const Station *st2 = *(const Station**)b;
	Money sum1 = 0, sum2 = 0;

	for (CargoID j = 0; j < NUM_CARGO; j++) {
		if (!HasBit(_cargo_filter, j)) continue;
		if (!st1->goods[j].cargo.Empty()) sum1 += GetTransportedGoodsIncome(st1->goods[j].cargo.Count(), 20, 50, j);
		if (!st2->goods[j].cargo.Empty()) sum2 += GetTransportedGoodsIncome(st2->goods[j].cargo.Count(), 20, 50, j);
	}

	return (_internal_sort_order & 1) ? ClampToI32(sum2 - sum1) : ClampToI32(sum1 - sum2);
}

/**
 * qsort-compatible version of sorting two stations by maximum rating
 * @param a   First object to be sorted, must be of type (const Station *)
 * @param b   Second object to be sorted, must be of type (const Station *)
 * @return    The sort order
 * @retval >0 a should come before b in the list
 * @retval <0 b should come before a in the list
 */
static int CDECL StationRatingMaxSorter(const void *a, const void *b)
{
	const Station *st1 = *(const Station**)a;
	const Station *st2 = *(const Station**)b;
	byte maxr1 = 0;
	byte maxr2 = 0;

	for (CargoID j = 0; j < NUM_CARGO; j++) {
		if (HasBit(st1->goods[j].acceptance_pickup, GoodsEntry::PICKUP)) maxr1 = max(maxr1, st1->goods[j].rating);
		if (HasBit(st2->goods[j].acceptance_pickup, GoodsEntry::PICKUP)) maxr2 = max(maxr2, st2->goods[j].rating);
	}

	return (_internal_sort_order & 1) ? maxr2 - maxr1 : maxr1 - maxr2;
}

typedef GUIList<const Station*> GUIStationList;

/**
 * Rebuild station list if the VL_REBUILD flag is set
 *
 * @param sl pointer to plstations_d (station list and flags)
 * @param owner player whose stations are to be in list
 * @param facilities types of stations of interest
 * @param cargo_filter bitmap of cargo types to include
 * @param include_empty whether we should include stations without waiting cargo
 */
static void BuildStationsList(GUIStationList *sl, PlayerID owner, byte facilities, uint32 cargo_filter, bool include_empty)
{
	if (!(sl->flags & VL_REBUILD)) return;

	sl->Clear();

	DEBUG(misc, 3, "Building station list for player %d", owner);

	const Station *st;
	FOR_ALL_STATIONS(st) {
		if (st->owner == owner || (st->owner == OWNER_NONE && !st->IsBuoy() && HasStationInUse(st->index, owner))) {
			if (facilities & st->facilities) { //only stations with selected facilities
				int num_waiting_cargo = 0;
				for (CargoID j = 0; j < NUM_CARGO; j++) {
					if (!st->goods[j].cargo.Empty()) {
						num_waiting_cargo++; //count number of waiting cargo
						if (HasBit(cargo_filter, j)) {
							*sl->Append() = st;
							break;
						}
					}
				}
				/* stations without waiting cargo */
				if (num_waiting_cargo == 0 && include_empty) {
					*sl->Append() = st;
				}
			}
		}
	}

	sl->Compact();

	sl->flags &= ~VL_REBUILD;
	sl->flags |= VL_RESORT;
}


/**
 * Sort station list if the VL_RESORT flag is set
 *
 * @param sl pointer to plstations_d (station list and flags)
 */
static void SortStationsList(GUIStationList *sl)
{
	static StationSortListingTypeFunction *const _station_sorter[] = {
		&StationNameSorter,
		&StationTypeSorter,
		&StationWaitingSorter,
		&StationRatingMaxSorter
	};

	if (!(sl->flags & VL_RESORT)) return;

	_internal_sort_order = sl->flags & VL_DESC;
	_last_station = NULL; // used for "cache" in namesorting
	qsort((void*)sl->Begin(), sl->Length(), sizeof(sl->Begin()), _station_sorter[sl->sort_type]);

	sl->resort_timer = DAY_TICKS * PERIODIC_RESORT_DAYS;
	sl->flags &= ~VL_RESORT;
}

/**
 * The list of stations per player.
 */
struct PlayerStationsWindow : public Window, public GUIStationList
{
	static Listing station_sort;
	static byte facilities;
	static bool include_empty;

	PlayerStationsWindow(const WindowDesc *desc, WindowNumber window_number) : Window(desc, window_number)
	{
		this->caption_color = (byte)this->window_number;
		this->vscroll.cap = 12;
		this->resize.step_height = 10;
		this->resize.height = this->height - 10 * 7; // minimum if 5 in the list

		/* Add cargo filter buttons */
		uint num_active = 0;
		for (CargoID c = 0; c < NUM_CARGO; c++) {
			if (GetCargo(c)->IsValid()) num_active++;
		}

		this->widget_count += num_active;
		this->widget = ReallocT(this->widget, this->widget_count + 1);
		this->widget[this->widget_count].type = WWT_LAST;

		uint i = 0;
		for (CargoID c = 0; c < NUM_CARGO; c++) {
			if (!GetCargo(c)->IsValid()) continue;

			Widget *wi = &this->widget[SLW_CARGOSTART + i];
			wi->type     = WWT_PANEL;
			wi->display_flags = RESIZE_NONE;
			wi->color    = 14;
			wi->left     = 89 + i * 14;
			wi->right    = wi->left + 13;
			wi->top      = 14;
			wi->bottom   = 24;
			wi->data     = 0;
			wi->tooltips = STR_USE_CTRL_TO_SELECT_MORE;

			if (HasBit(_cargo_filter, c)) this->LowerWidget(SLW_CARGOSTART + i);
			i++;
		}

		this->widget[SLW_NOCARGOWAITING].left += num_active * 14;
		this->widget[SLW_NOCARGOWAITING].right += num_active * 14;
		this->widget[SLW_CARGOALL].left += num_active * 14;
		this->widget[SLW_CARGOALL].right += num_active * 14;
		this->widget[SLW_PAN_RIGHT].left += num_active * 14;

		if (num_active > 15) {
			/* Resize and fix the minimum width, if necessary */
			ResizeWindow(this, (num_active - 15) * 14, 0);
			this->resize.width = this->width;
		}

		if (_cargo_filter == _cargo_filter_max) _cargo_filter = _cargo_mask;

		for (uint i = 0; i < 5; i++) {
			if (HasBit(facilities, i)) this->LowerWidget(i + SLW_TRAIN);
		}
		this->SetWidgetLoweredState(SLW_FACILALL, facilities == (FACIL_TRAIN | FACIL_TRUCK_STOP | FACIL_BUS_STOP | FACIL_AIRPORT | FACIL_DOCK));
		this->SetWidgetLoweredState(SLW_CARGOALL, _cargo_filter == _cargo_mask && include_empty);
		this->SetWidgetLoweredState(SLW_NOCARGOWAITING, include_empty);

		this->flags = VL_REBUILD;
		this->sort_type = station_sort.criteria;
		if (station_sort.order) this->flags |= VL_DESC;

		/* set up resort timer */
		this->resort_timer = DAY_TICKS * PERIODIC_RESORT_DAYS;

		this->FindWindowPlacementAndResize(desc);
	}

	virtual void OnPaint()
	{
		PlayerID owner = (PlayerID)this->window_number;

		BuildStationsList(this, owner, facilities, _cargo_filter, include_empty);
		SortStationsList(this);

		SetVScrollCount(this, this->Length());

		/* draw widgets, with player's name in the caption */
		SetDParam(0, owner);
		SetDParam(1, this->vscroll.count);

		/* Set text of sort by dropdown */
		this->widget[SLW_SORTDROPBTN].data = _station_sort_listing[this->sort_type];

		this->DrawWidgets();

		/* draw arrow pointing up/down for ascending/descending sorting */
		this->DrawSortButtonState(SLW_SORTBY, this->flags & VL_DESC ? SBS_DOWN : SBS_UP);

		int cg_ofst;
		int x = 89;
		int y = 14;
		int xb = 2; ///< offset from left of widget

		uint i = 0;
		for (CargoID c = 0; c < NUM_CARGO; c++) {
			const CargoSpec *cs = GetCargo(c);
			if (!cs->IsValid()) continue;

			cg_ofst = HasBit(_cargo_filter, c) ? 2 : 1;
			GfxFillRect(x + cg_ofst, y + cg_ofst, x + cg_ofst + 10 , y + cg_ofst + 7, cs->rating_colour);
			DrawStringCentered(x + 6 + cg_ofst, y + cg_ofst, cs->abbrev, TC_BLACK);
			x += 14;
			i++;
		}

		x += 6;
		cg_ofst = this->IsWidgetLowered(SLW_NOCARGOWAITING) ? 2 : 1;
		DrawStringCentered(x + cg_ofst, y + cg_ofst, STR_ABBREV_NONE, TC_BLACK);
		x += 14;
		cg_ofst = this->IsWidgetLowered(SLW_CARGOALL) ? 2 : 1;
		DrawStringCentered(x + cg_ofst, y + cg_ofst, STR_ABBREV_ALL, TC_BLACK);

		cg_ofst = this->IsWidgetLowered(SLW_FACILALL) ? 2 : 1;
		DrawString(71 + cg_ofst, y + cg_ofst, STR_ABBREV_ALL, TC_BLACK);

		if (this->vscroll.count == 0) { // player has no stations
			DrawString(xb, 40, STR_304A_NONE, TC_FROMSTRING);
			return;
		}

		int max = min(this->vscroll.pos + this->vscroll.cap, this->Length());
		y = 40; // start of the list-widget

		for (int i = this->vscroll.pos; i < max; ++i) { // do until max number of stations of owner
			const Station *st = *this->Get(i);
			int x;

			assert(st->xy != 0);

			/* Do not do the complex check HasStationInUse here, it may be even false
				* when the order had been removed and the station list hasn't been removed yet */
			assert(st->owner == owner || (st->owner == OWNER_NONE && !st->IsBuoy()));

			SetDParam(0, st->index);
			SetDParam(1, st->facilities);
			x = DrawString(xb, y, STR_3049_0, TC_FROMSTRING) + 5;

			/* show cargo waiting and station ratings */
			for (CargoID j = 0; j < NUM_CARGO; j++) {
				if (!st->goods[j].cargo.Empty()) {
					StationsWndShowStationRating(x, y, j, st->goods[j].cargo.Count(), st->goods[j].rating);
					x += 20;
				}
			}
			y += 10;
		}
	}

	virtual void OnClick(Point pt, int widget)
	{
		switch (widget) {
			case SLW_LIST: {
				uint32 id_v = (pt.y - 41) / 10;

				if (id_v >= this->vscroll.cap) return; // click out of bounds

				id_v += this->vscroll.pos;

				if (id_v >= this->Length()) return; // click out of list bound

				const Station *st = *this->Get(id_v);
				/* do not check HasStationInUse - it is slow and may be invalid */
				assert(st->owner == (PlayerID)this->window_number || (st->owner == OWNER_NONE && !st->IsBuoy()));

				if (_ctrl_pressed) {
					ShowExtraViewPortWindow(st->xy);
				} else {
					ScrollMainWindowToTile(st->xy);
				}
				break;
			}

			case SLW_TRAIN:
			case SLW_TRUCK:
			case SLW_BUS:
			case SLW_AIRPLANE:
			case SLW_SHIP:
				if (_ctrl_pressed) {
					ToggleBit(facilities, widget - SLW_TRAIN);
					this->ToggleWidgetLoweredState(widget);
				} else {
					uint i;
					FOR_EACH_SET_BIT(i, facilities) {
						this->RaiseWidget(i + SLW_TRAIN);
					}
					SetBit(facilities, widget - SLW_TRAIN);
					this->LowerWidget(widget);
				}
				this->SetWidgetLoweredState(SLW_FACILALL, facilities == (FACIL_TRAIN | FACIL_TRUCK_STOP | FACIL_BUS_STOP | FACIL_AIRPORT | FACIL_DOCK));
				this->flags |= VL_REBUILD;
				this->SetDirty();
				break;

			case SLW_FACILALL:
				for (uint i = 0; i < 5; i++) {
					this->LowerWidget(i + SLW_TRAIN);
				}
				this->LowerWidget(SLW_FACILALL);

				facilities = FACIL_TRAIN | FACIL_TRUCK_STOP | FACIL_BUS_STOP | FACIL_AIRPORT | FACIL_DOCK;
				this->flags |= VL_REBUILD;
				this->SetDirty();
				break;

			case SLW_CARGOALL: {
				uint i = 0;
				for (CargoID c = 0; c < NUM_CARGO; c++) {
					if (!GetCargo(c)->IsValid()) continue;
					this->LowerWidget(i + SLW_CARGOSTART);
					i++;
				}
				this->LowerWidget(SLW_NOCARGOWAITING);
				this->LowerWidget(SLW_CARGOALL);

				_cargo_filter = _cargo_mask;
				include_empty = true;
				this->flags |= VL_REBUILD;
				this->SetDirty();
				break;
			}

			case SLW_SORTBY: // flip sorting method asc/desc
				this->flags ^= VL_DESC; //DESC-flag
				station_sort.order = HasBit(this->flags, 0);
				this->flags |= VL_RESORT;
				this->flags4 |= 5 << WF_TIMEOUT_SHL;
				this->LowerWidget(SLW_SORTBY);
				this->SetDirty();
				break;

			case SLW_SORTDROPBTN: // select sorting criteria dropdown menu
				ShowDropDownMenu(this, _station_sort_listing, this->sort_type, SLW_SORTDROPBTN, 0, 0);
				break;

			case SLW_NOCARGOWAITING:
				if (_ctrl_pressed) {
					include_empty = !include_empty;
					this->ToggleWidgetLoweredState(SLW_NOCARGOWAITING);
				} else {
					for (uint i = SLW_CARGOSTART; i < this->widget_count; i++) {
						this->RaiseWidget(i);
					}

					_cargo_filter = 0;
					include_empty = true;

					this->LowerWidget(SLW_NOCARGOWAITING);
				}
				this->flags |= VL_REBUILD;
				this->SetWidgetLoweredState(SLW_CARGOALL, _cargo_filter == _cargo_mask && include_empty);
				this->SetDirty();
				break;

			default:
				if (widget >= SLW_CARGOSTART) { // change cargo_filter
					/* Determine the selected cargo type */
					CargoID c;
					int i = 0;
					for (c = 0; c < NUM_CARGO; c++) {
						if (!GetCargo(c)->IsValid()) continue;
						if (widget - SLW_CARGOSTART == i) break;
						i++;
					}

					if (_ctrl_pressed) {
						ToggleBit(_cargo_filter, c);
						this->ToggleWidgetLoweredState(widget);
					} else {
						for (uint i = SLW_CARGOSTART; i < this->widget_count; i++) {
							this->RaiseWidget(i);
						}
						this->RaiseWidget(SLW_NOCARGOWAITING);

						_cargo_filter = 0;
						include_empty = false;

						SetBit(_cargo_filter, c);
						this->LowerWidget(widget);
					}
					this->flags |= VL_REBUILD;
					this->SetWidgetLoweredState(SLW_CARGOALL, _cargo_filter == _cargo_mask && include_empty);
					this->SetDirty();
				}
				break;
		}
	}

	virtual void OnDropdownSelect(int widget, int index)
	{
		if (this->sort_type != index) {
			/* value has changed -> resort */
			this->sort_type = index;
			station_sort.criteria = this->sort_type;
			this->flags |= VL_RESORT;
		}
		this->SetDirty();
	}

	virtual void OnTick()
	{
		if (_pause_game != 0) return;
		if (--this->resort_timer == 0) {
			DEBUG(misc, 3, "Periodic rebuild station list player %d", this->window_number);
			this->resort_timer = DAY_TICKS * PERIODIC_RESORT_DAYS;
			this->flags |= VL_REBUILD;
			this->SetDirty();
		}
	}

	virtual void OnTimeout()
	{
		this->RaiseWidget(SLW_SORTBY);
		this->SetDirty();
	}

	virtual void OnResize(Point new_size, Point delta)
	{
		this->vscroll.cap += delta.y / 10;
	}

	virtual void OnInvalidateData(int data)
	{
		this->flags |= (data == 0 ? VL_REBUILD : VL_RESORT);
	}
};

Listing PlayerStationsWindow::station_sort = {0, 0};
byte PlayerStationsWindow::facilities = FACIL_TRAIN | FACIL_TRUCK_STOP | FACIL_BUS_STOP | FACIL_AIRPORT | FACIL_DOCK;
bool PlayerStationsWindow::include_empty = true;


static const Widget _player_stations_widgets[] = {
{   WWT_CLOSEBOX,   RESIZE_NONE,    14,     0,    10,     0,    13, STR_00C5,          STR_018B_CLOSE_WINDOW},            // SLW_CLOSEBOX
{    WWT_CAPTION,  RESIZE_RIGHT,    14,    11,   345,     0,    13, STR_3048_STATIONS, STR_018C_WINDOW_TITLE_DRAG_THIS},
{  WWT_STICKYBOX,     RESIZE_LR,    14,   346,   357,     0,    13, 0x0,               STR_STICKY_BUTTON},
{      WWT_PANEL,     RESIZE_RB,    14,     0,   345,    37,   161, 0x0,               STR_3057_STATION_NAMES_CLICK_ON},  // SLW_LIST
{  WWT_SCROLLBAR,    RESIZE_LRB,    14,   346,   357,    37,   149, 0x0,               STR_0190_SCROLL_BAR_SCROLLS_LIST},
{  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   346,   357,   150,   161, 0x0,               STR_RESIZE_BUTTON},

{    WWT_TEXTBTN,   RESIZE_NONE,    14,     0,    13,    14,    24, STR_TRAIN,         STR_USE_CTRL_TO_SELECT_MORE},      // SLW_TRAIN
{    WWT_TEXTBTN,   RESIZE_NONE,    14,    14,    27,    14,    24, STR_LORRY,         STR_USE_CTRL_TO_SELECT_MORE},      // SLW_TRUCK
{    WWT_TEXTBTN,   RESIZE_NONE,    14,    28,    41,    14,    24, STR_BUS,           STR_USE_CTRL_TO_SELECT_MORE},      // SLW_BUS
{    WWT_TEXTBTN,   RESIZE_NONE,    14,    42,    55,    14,    24, STR_PLANE,         STR_USE_CTRL_TO_SELECT_MORE},      // SLW_AIRPLANE
{    WWT_TEXTBTN,   RESIZE_NONE,    14,    56,    69,    14,    24, STR_SHIP,          STR_USE_CTRL_TO_SELECT_MORE},      // SLW_SHIP
{      WWT_PANEL,   RESIZE_NONE,    14,    70,    83,    14,    24, 0x0,               STR_SELECT_ALL_FACILITIES},        // SLW_FACILALL

{      WWT_PANEL,   RESIZE_NONE,    14,    83,    88,    14,    24, 0x0,               STR_NULL},                         // SLW_PAN_BETWEEN
{      WWT_PANEL,   RESIZE_NONE,    14,    89,   102,    14,    24, 0x0,               STR_NO_WAITING_CARGO},             // SLW_NOCARGOWAITING
{      WWT_PANEL,   RESIZE_NONE,    14,   103,   116,    14,    24, 0x0,               STR_SELECT_ALL_TYPES},             // SLW_CARGOALL
{      WWT_PANEL,  RESIZE_RIGHT,    14,   117,   357,    14,    24, 0x0,               STR_NULL},                         // SLW_PAN_RIGHT

{    WWT_TEXTBTN,   RESIZE_NONE,    14,     0,    80,    25,    36, STR_SORT_BY,       STR_SORT_ORDER_TIP},               // SLW_SORTBY
{   WWT_DROPDOWN,   RESIZE_NONE,    14,    81,   243,    25,    36, 0x0,               STR_SORT_CRITERIA_TIP},            // SLW_SORTDROPBTN
{      WWT_PANEL,  RESIZE_RIGHT,    14,   244,   357,    25,    36, 0x0,               STR_NULL},                         // SLW_PAN_SORT_RIGHT
{   WIDGETS_END},
};

static const WindowDesc _player_stations_desc = {
	WDP_AUTO, WDP_AUTO, 358, 162, 358, 162,
	WC_STATION_LIST, WC_NONE,
	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_STICKY_BUTTON | WDF_RESIZABLE,
	_player_stations_widgets,
};

/**
 * Opens window with list of player's stations
 *
 * @param player player whose stations' list show
 */
void ShowPlayerStations(PlayerID player)
{
	if (!IsValidPlayer(player)) return;

	AllocateWindowDescFront<PlayerStationsWindow>(&_player_stations_desc, player);
}

static const Widget _station_view_widgets[] = {
{   WWT_CLOSEBOX,   RESIZE_NONE,    14,     0,    10,     0,    13, STR_00C5,          STR_018B_CLOSE_WINDOW},                // SVW_CLOSEBOX
{    WWT_CAPTION,  RESIZE_RIGHT,    14,    11,   236,     0,    13, STR_300A_0,        STR_018C_WINDOW_TITLE_DRAG_THIS},
{  WWT_STICKYBOX,     RESIZE_LR,    14,   237,   248,     0,    13, 0x0,               STR_STICKY_BUTTON},
{      WWT_PANEL,     RESIZE_RB,    14,     0,   236,    14,    65, 0x0,               STR_NULL},                             // SVW_WAITING
{  WWT_SCROLLBAR,    RESIZE_LRB,    14,   237,   248,    14,    65, 0x0,               STR_0190_SCROLL_BAR_SCROLLS_LIST},
{      WWT_PANEL,    RESIZE_RTB,    14,     0,   248,    66,    97, 0x0,               STR_NULL},                             // SVW_ACCEPTLIST / SVW_RATINGLIST
{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,     0,    59,    98,   109, STR_00E4_LOCATION, STR_3053_CENTER_MAIN_VIEW_ON_STATION}, // SVW_LOCATION
{ WWT_PUSHTXTBTN,     RESIZE_TB,    14,    60,   120,    98,   109, STR_3032_RATINGS,  STR_3054_SHOW_STATION_RATINGS},        // SVW_RATINGS / SVW_ACCEPTS
{ WWT_PUSHTXTBTN,    RESIZE_RTB,    14,   121,   180,    98,   109, STR_0130_RENAME,   STR_3055_CHANGE_NAME_OF_STATION},      // SVW_RENAME
{ WWT_PUSHTXTBTN,   RESIZE_LRTB,    14,   181,   194,    98,   109, STR_TRAIN,         STR_SCHEDULED_TRAINS_TIP },            // SVW_TRAINS
{ WWT_PUSHTXTBTN,   RESIZE_LRTB,    14,   195,   208,    98,   109, STR_LORRY,         STR_SCHEDULED_ROAD_VEHICLES_TIP },     // SVW_ROADVEHS
{ WWT_PUSHTXTBTN,   RESIZE_LRTB,    14,   209,   222,    98,   109, STR_PLANE,         STR_SCHEDULED_AIRCRAFT_TIP },          // SVW_PLANES
{ WWT_PUSHTXTBTN,   RESIZE_LRTB,    14,   223,   236,    98,   109, STR_SHIP,          STR_SCHEDULED_SHIPS_TIP },             // SVW_SHIPS
{  WWT_RESIZEBOX,   RESIZE_LRTB,    14,   237,   248,    98,   109, 0x0,               STR_RESIZE_BUTTON},
{   WIDGETS_END},
};

SpriteID GetCargoSprite(CargoID i)
{
	const CargoSpec *cs = GetCargo(i);
	SpriteID sprite;

	if (cs->sprite == 0xFFFF) {
		/* A value of 0xFFFF indicates we should draw a custom icon */
		sprite = GetCustomCargoSprite(cs);
	} else {
		sprite = cs->sprite;
	}

	if (sprite == 0) sprite = SPR_CARGO_GOODS;

	return sprite;
}

/**
 * Draws icons of waiting cargo in the StationView window
 *
 * @param i type of cargo
 * @param waiting number of waiting units
 * @param x x on-screen coordinate where to start with drawing icons
 * @param y y coordinate
 */
static void DrawCargoIcons(CargoID i, uint waiting, int x, int y, uint width)
{
	uint num = min((waiting + 5) / 10, width / 10); // maximum is width / 10 icons so it won't overflow
	if (num == 0) return;

	SpriteID sprite = GetCargoSprite(i);

	do {
		DrawSprite(sprite, PAL_NONE, x, y);
		x += 10;
	} while (--num);
}

struct CargoData {
	CargoID cargo;
	StationID source;
	uint count;

	CargoData(CargoID cargo, StationID source, uint count) :
		cargo(cargo),
		source(source),
		count(count)
	{ }
};

typedef std::list<CargoData> CargoDataList;

/**
 * The StationView window
 */
struct StationViewWindow : public Window {
	uint32 cargo;                 ///< Bitmask of cargo types to expand
	uint16 cargo_rows[NUM_CARGO]; ///< Header row for each cargo type

	StationViewWindow(const WindowDesc *desc, WindowNumber window_number) : Window(desc, window_number)
	{
		PlayerID owner = GetStation(window_number)->owner;
		if (owner != OWNER_NONE) this->caption_color = owner;
		this->vscroll.cap = 5;
		this->resize.step_height = 10;

		this->FindWindowPlacementAndResize(desc);
	}

	~StationViewWindow()
	{
		WindowNumber wno =
			(this->window_number << 16) | VLW_STATION_LIST | GetStation(this->window_number)->owner;

		DeleteWindowById(WC_TRAINS_LIST, wno);
		DeleteWindowById(WC_ROADVEH_LIST, wno);
		DeleteWindowById(WC_SHIPS_LIST, wno);
		DeleteWindowById(WC_AIRCRAFT_LIST, wno);
	}

	virtual void OnPaint()
	{
		StationID station_id = this->window_number;
		const Station *st = GetStation(station_id);
		CargoDataList cargolist;
		uint32 transfers = 0;

		/* count types of cargos waiting in station */
		for (CargoID i = 0; i < NUM_CARGO; i++) {
			if (st->goods[i].cargo.Empty()) {
				this->cargo_rows[i] = 0;
			} else {
				/* Add an entry for total amount of cargo of this type waiting. */
				cargolist.push_back(CargoData(i, INVALID_STATION, st->goods[i].cargo.Count()));

				/* Set the row for this cargo entry for the expand/hide button */
				this->cargo_rows[i] = cargolist.size();

				/* Add an entry for each distinct cargo source. */
				const CargoList::List *packets = st->goods[i].cargo.Packets();
				for (CargoList::List::const_iterator it = packets->begin(); it != packets->end(); it++) {
					const CargoPacket *cp = *it;
					if (cp->source != station_id) {
						bool added = false;

						/* Enable the expand/hide button for this cargo type */
						SetBit(transfers, i);

						/* Don't add cargo lines if not expanded */
						if (!HasBit(this->cargo, i)) break;

						/* Check if we already have this source in the list */
						for (CargoDataList::iterator jt = cargolist.begin(); jt != cargolist.end(); jt++) {
							CargoData *cd = &(*jt);
							if (cd->cargo == i && cd->source == cp->source) {
								cd->count += cp->count;
								added = true;
								break;
							}
						}

						if (!added) cargolist.push_back(CargoData(i, cp->source, cp->count));
					}
				}
			}
		}
		SetVScrollCount(this, cargolist.size() + 1); // update scrollbar

		/* disable some buttons */
		this->SetWidgetDisabledState(SVW_RENAME,   st->owner != _local_player);
		this->SetWidgetDisabledState(SVW_TRAINS,   !(st->facilities & FACIL_TRAIN));
		this->SetWidgetDisabledState(SVW_ROADVEHS, !(st->facilities & FACIL_TRUCK_STOP) && !(st->facilities & FACIL_BUS_STOP));
		this->SetWidgetDisabledState(SVW_PLANES,   !(st->facilities & FACIL_AIRPORT));
		this->SetWidgetDisabledState(SVW_SHIPS,    !(st->facilities & FACIL_DOCK));

		SetDParam(0, st->index);
		SetDParam(1, st->facilities);
		this->DrawWidgets();

		int x = 2;  ///< coordinates used for printing waiting/accepted/rating of cargo
		int y = 15;
		int pos = this->vscroll.pos; ///< = this->vscroll.pos

		uint width = this->widget[SVW_WAITING].right - this->widget[SVW_WAITING].left - 4;
		int maxrows = this->vscroll.cap;

		StringID str;

		if (--pos < 0) {
			str = STR_00D0_NOTHING;
			for (CargoID i = 0; i < NUM_CARGO; i++) {
				if (!st->goods[i].cargo.Empty()) str = STR_EMPTY;
			}
			SetDParam(0, str);
			DrawString(x, y, STR_0008_WAITING, TC_FROMSTRING);
			y += 10;
		}

		for (CargoDataList::const_iterator it = cargolist.begin(); it != cargolist.end() && pos > -maxrows; ++it) {
			if (--pos < 0) {
				const CargoData *cd = &(*it);
				if (cd->source == INVALID_STATION) {
					/* Heading */
					DrawCargoIcons(cd->cargo, cd->count, x, y, width);
					SetDParam(0, cd->cargo);
					SetDParam(1, cd->count);
					if (HasBit(transfers, cd->cargo)) {
						/* This cargo has transfers waiting so show the expand or shrink 'button' */
						const char *sym = HasBit(this->cargo, cd->cargo) ? "-" : "+";
						DrawStringRightAligned(x + width - 8, y, STR_0009, TC_FROMSTRING);
						DoDrawString(sym, x + width - 6, y, TC_YELLOW);
					} else {
						DrawStringRightAligned(x + width, y, STR_0009, TC_FROMSTRING);
					}
				} else {
					SetDParam(0, cd->cargo);
					SetDParam(1, cd->count);
					SetDParam(2, cd->source);
					DrawStringRightAlignedTruncated(x + width, y, STR_EN_ROUTE_FROM, TC_FROMSTRING, width);
				}

				y += 10;
			}
		}

		if (this->widget[SVW_ACCEPTS].data == STR_3032_RATINGS) { // small window with list of accepted cargo
			char *b = _userstring;
			bool first = true;

			b = InlineString(b, STR_000C_ACCEPTS);

			for (CargoID i = 0; i < NUM_CARGO; i++) {
				if (b >= lastof(_userstring) - (1 + 2 * 4)) break; // ',' or ' ' and two calls to Utf8Encode()
				if (HasBit(st->goods[i].acceptance_pickup, GoodsEntry::ACCEPTANCE)) {
					if (first) {
						first = false;
					} else {
						/* Add a comma if this is not the first item */
						*b++ = ',';
						*b++ = ' ';
					}
					b = InlineString(b, GetCargo(i)->name);
				}
			}

			/* If first is still true then no cargo is accepted */
			if (first) b = InlineString(b, STR_00D0_NOTHING);

			*b = '\0';

			/* Make sure we detect any buffer overflow */
			assert(b < endof(_userstring));

			DrawStringMultiLine(2, this->widget[SVW_ACCEPTLIST].top + 1, STR_SPEC_USERSTRING, this->widget[SVW_ACCEPTLIST].right - this->widget[SVW_ACCEPTLIST].left);
		} else { // extended window with list of cargo ratings
			y = this->widget[SVW_RATINGLIST].top + 1;

			DrawString(2, y, STR_3034_LOCAL_RATING_OF_TRANSPORT, TC_FROMSTRING);
			y += 10;

			for (CargoID i = 0; i < NUM_CARGO; i++) {
				const CargoSpec *cs = GetCargo(i);
				if (!cs->IsValid()) continue;

				const GoodsEntry *ge = &st->goods[i];
				if (!HasBit(ge->acceptance_pickup, GoodsEntry::PICKUP)) continue;

				SetDParam(0, cs->name);
				SetDParam(2, ge->rating * 101 >> 8);
				SetDParam(1, STR_3035_APPALLING + (ge->rating >> 5));
				DrawString(8, y, STR_303D, TC_FROMSTRING);
				y += 10;
			}
		}
	}

	void HandleCargoWaitingClick(int row)
	{
		if (row == 0) return;

		for (CargoID c = 0; c < NUM_CARGO; c++) {
			if (this->cargo_rows[c] == row) {
				ToggleBit(this->cargo, c);
				this->InvalidateWidget(SVW_WAITING);
				break;
			}
		}
	}

	virtual void OnClick(Point pt, int widget)
	{
		switch (widget) {
			case SVW_WAITING:
				this->HandleCargoWaitingClick((pt.y - this->widget[SVW_WAITING].top) / 10 + this->vscroll.pos);
				break;

			case SVW_LOCATION:
				if (_ctrl_pressed) {
					ShowExtraViewPortWindow(GetStation(this->window_number)->xy);
				} else {
					ScrollMainWindowToTile(GetStation(this->window_number)->xy);
				}
				break;

			case SVW_RATINGS:
				this->SetDirty();

				if (this->widget[SVW_RATINGS].data == STR_3032_RATINGS) {
					/* Switch to ratings view */
					this->widget[SVW_RATINGS].data = STR_3033_ACCEPTS;
					this->widget[SVW_RATINGS].tooltips = STR_3056_SHOW_LIST_OF_ACCEPTED_CARGO;
					ResizeWindowForWidget(this, SVW_ACCEPTLIST, 0, 100);
				} else {
					/* Switch to accepts view */
					this->widget[SVW_RATINGS].data = STR_3032_RATINGS;
					this->widget[SVW_RATINGS].tooltips = STR_3054_SHOW_STATION_RATINGS;
					ResizeWindowForWidget(this, SVW_ACCEPTLIST, 0, -100);
				}

				this->SetDirty();
				break;

			case SVW_RENAME:
				SetDParam(0, this->window_number);
				ShowQueryString(STR_STATION, STR_3030_RENAME_STATION_LOADING, 31, 180, this, CS_ALPHANUMERAL);
				break;

			case SVW_TRAINS: { // Show a list of scheduled trains to this station
				const Station *st = GetStation(this->window_number);
				ShowVehicleListWindow(st->owner, VEH_TRAIN, (StationID)this->window_number);
				break;
			}

			case SVW_ROADVEHS: { // Show a list of scheduled road-vehicles to this station
				const Station *st = GetStation(this->window_number);
				ShowVehicleListWindow(st->owner, VEH_ROAD, (StationID)this->window_number);
				break;
			}

			case SVW_PLANES: { // Show a list of scheduled aircraft to this station
				const Station *st = GetStation(this->window_number);
				/* Since oilrigs have no owners, show the scheduled aircraft of current player */
				PlayerID owner = (st->owner == OWNER_NONE) ? _current_player : st->owner;
				ShowVehicleListWindow(owner, VEH_AIRCRAFT, (StationID)this->window_number);
				break;
			}

			case SVW_SHIPS: { // Show a list of scheduled ships to this station
				const Station *st = GetStation(this->window_number);
				/* Since oilrigs/bouys have no owners, show the scheduled ships of current player */
				PlayerID owner = (st->owner == OWNER_NONE) ? _current_player : st->owner;
				ShowVehicleListWindow(owner, VEH_SHIP, (StationID)this->window_number);
				break;
			}
		}
	}

	virtual void OnQueryTextFinished(char *str)
	{
		if (!StrEmpty(str)) {
			_cmd_text = str;
			DoCommandP(0, this->window_number, 0, NULL,
				CMD_RENAME_STATION | CMD_MSG(STR_3031_CAN_T_RENAME_STATION));
		}
	}

	virtual void OnResize(Point new_size, Point delta)
	{
		if (delta.x != 0) ResizeButtons(this, SVW_LOCATION, SVW_RENAME);
		this->vscroll.cap += delta.y / (int)this->resize.step_height;
	}
};


static const WindowDesc _station_view_desc = {
	WDP_AUTO, WDP_AUTO, 249, 110, 249, 110,
	WC_STATION_VIEW, WC_NONE,
	WDF_STD_TOOLTIPS | WDF_STD_BTN | WDF_DEF_WIDGET | WDF_UNCLICK_BUTTONS | WDF_STICKY_BUTTON | WDF_RESIZABLE,
	_station_view_widgets,
};

/**
 * Opens StationViewWindow for given station
 *
 * @param station station which window should be opened
 */
void ShowStationViewWindow(StationID station)
{
	AllocateWindowDescFront<StationViewWindow>(&_station_view_desc, station);
}