/** The widgets for the scan progress. */

enum ScanProgressWindowWidgets {

	SPWW_PROGRESS_BAR,  ///< Simple progress bar.

	GPWW_PROGRESS_TEXT, ///< Text explaining what is happening.

};

/** Widgets for the progress window. */

static const NWidgetPart _nested_scan_progress_widgets[] = {

	NWidget(WWT_CAPTION, COLOUR_GREY), SetDataTip(STR_NEWGRF_SCAN_CAPTION, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS),

	NWidget(WWT_PANEL, COLOUR_GREY),

		NWidget(NWID_HORIZONTAL), SetPIP(20, 0, 20),

			NWidget(NWID_VERTICAL), SetPIP(11, 8, 11),

				NWidget(WWT_LABEL, INVALID_COLOUR), SetDataTip(STR_NEWGRF_SCAN_MESSAGE, STR_NULL), SetFill(1, 0),

				NWidget(WWT_EMPTY, INVALID_COLOUR, SPWW_PROGRESS_BAR), SetFill(1, 0),

				NWidget(WWT_EMPTY, INVALID_COLOUR, GPWW_PROGRESS_TEXT), SetFill(1, 0),

			EndContainer(),

		EndContainer(),

	EndContainer(),

};

/** Description of the widgets and other settings of the window. */

static const WindowDesc _scan_progress_desc(

	WDP_CENTER, 0, 0,

	WC_MODAL_PROGRESS, WC_NONE,

	WDF_UNCLICK_BUTTONS,

	_nested_scan_progress_widgets, lengthof(_nested_scan_progress_widgets)

);

/** Window for showing the progress of NewGRF scanning. */

struct ScanProgressWindow : public Window {

	char *last_name; ///< The name of the last 'seen' NewGRF.

	int scanned;     ///< The number of NewGRFs that we have seen.

	/** Create the window. */

	ScanProgressWindow() : Window(), last_name(NULL), scanned(0)

	{

		this->InitNested(&_scan_progress_desc);

	}

	/** Free the last name buffer. */

	~ScanProgressWindow()

	{

		free(last_name);

	}

	virtual void UpdateWidgetSize(int widget, Dimension *size, const Dimension &padding, Dimension *fill, Dimension *resize)

	{

		switch (widget) {

			case SPWW_PROGRESS_BAR: {

				SetDParam(0, 100);

				*size = GetStringBoundingBox(STR_GENERATION_PROGRESS);

				/* We need some spacing for the 'border' */

				size->height += 8;

				size->width += 8;

				break;

			}

			case GPWW_PROGRESS_TEXT:

				SetDParam(0, 9999);

				SetDParam(1, 9999);

				/* We really don't know the width. We could determine it by scanning the NewGRFs,

				 * but this is the status window for scanning them... */

				size->width = max(400U, GetStringBoundingBox(STR_NEWGRF_SCAN_STATUS).width);

				size->height = FONT_HEIGHT_NORMAL * 2 + WD_PAR_VSEP_NORMAL;

				break;

		}

	}

	virtual void DrawWidget(const Rect &r, int widget) const

	{

		switch (widget) {

			case SPWW_PROGRESS_BAR: {

				/* Draw the % complete with a bar and a text */

				DrawFrameRect(r.left, r.top, r.right, r.bottom, COLOUR_GREY, FR_BORDERONLY);

				uint percent = scanned * 100 / max(1U, _settings_client.gui.last_newgrf_count);

				DrawFrameRect(r.left + 1, r.top + 1, (int)((r.right - r.left - 2) * percent / 100) + r.left + 1, r.bottom - 1, COLOUR_MAUVE, FR_NONE);

				SetDParam(0, percent);

				DrawString(r.left, r.right, r.top + 5, STR_GENERATION_PROGRESS, TC_FROMSTRING, SA_HOR_CENTER);

				break;

			}

			case GPWW_PROGRESS_TEXT:

				SetDParam(0, this->scanned);

				SetDParam(1, _settings_client.gui.last_newgrf_count);

				DrawString(r.left, r.right, r.top, STR_NEWGRF_SCAN_STATUS, TC_FROMSTRING, SA_HOR_CENTER);

				DrawString(r.left, r.right, r.top + FONT_HEIGHT_NORMAL + WD_PAR_VSEP_NORMAL, this->last_name == NULL ? "" : this->last_name, TC_BLACK, SA_HOR_CENTER);

				break;

		}

	}

	/**

	 * Update the NewGRF scan status.

	 * @param num  The number of NewGRFs scanned so far.

	 * @param name The name of the last scanned NewGRF.

	 */

	void UpdateNewGRFScanStatus(uint num, const char *name)

	{

		free(this->last_name);

		this->last_name = strdup(name);

		this->scanned = num;

		if (num > _settings_client.gui.last_newgrf_count) _settings_client.gui.last_newgrf_count = num;

		this->SetDirty();

	}

};

/**

 * Update the NewGRF scan status.

 * @param num  The number of NewGRFs scanned so far.

 * @param name The name of the last scanned NewGRF.

 */

void UpdateNewGRFScanStatus(uint num, const char *name)

{

	ScanProgressWindow *w  = dynamic_cast<ScanProgressWindow *>(FindWindowByClass(WC_MODAL_PROGRESS));

	if (w == NULL) w = new ScanProgressWindow();

	w->UpdateNewGRFScanStatus(num, name);

}