/*  PCSX2 - PS2 Emulator for PCs
 *  Copyright (C) 2002-2010  PCSX2 Dev Team
 *
 *  PCSX2 is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU Lesser General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with PCSX2.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include <wx/wizard.h>
#include "common/pxStaticText.h"
#include "common/Assertions.h"

// --------------------------------------------------------------------------------------
//  pxStaticText  (implementations)
// --------------------------------------------------------------------------------------
pxStaticText::pxStaticText(wxWindow* parent)
	: _parent(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNO_BORDER)
{
	m_align = wxALIGN_CENTRE_HORIZONTAL;
	m_autowrap = true;
	m_wrappedWidth = -1;
	m_heightInLines = 1;

	SetPaddingDefaults();
}

pxStaticText::pxStaticText(wxWindow* parent, const wxString& label, wxAlignment align)
	: _parent(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxNO_BORDER)
{
	m_heightInLines = 1;
	m_align = align;

	SetPaddingDefaults();
	Init(label);
}

void pxStaticText::Init(const wxString& label)
{
	m_autowrap = true;
	m_wrappedWidth = -1;
	m_label = label;
	Bind(wxEVT_PAINT, &pxStaticText::paintEvent, this);
}

// we need to refresh the window after changing its size as the standard
// control doesn't always update itself properly (fials typically on window resizes where
// the control is expanded to fit -- ie the control's size changes but the position does not)
void pxStaticText::DoSetSize(int x, int y, int w, int h, int sizeFlags)
{
	_parent::DoSetSize(x, y, w, h, sizeFlags);
	Refresh();
}

void pxStaticText::SetPaddingDefaults()
{
	m_paddingPix_horiz = 7;
	m_paddingPix_vert = 1;

	m_paddingPct_horiz = 0.0f;
	m_paddingPct_vert = 0.0f;
}

pxStaticText& pxStaticText::SetMinWidth(int width)
{
	SetMinSize(wxSize(width, GetMinHeight()));
	return *this;
}

pxStaticText& pxStaticText::SetMinHeight(int height)
{
	SetMinSize(wxSize(GetMinWidth(), height));
	return *this;
}

pxStaticText& pxStaticText::SetHeight(int lines)
{
	if (!pxAssert(lines > 0))
		lines = 2;
	m_heightInLines = lines;

	const int newHeight = (pxGetCharHeight(this) * m_heightInLines) + (m_paddingPix_vert * 2);
	SetMinSize(wxSize(GetMinWidth(), newHeight));

	return *this;
}

pxStaticText& pxStaticText::Align(wxAlignment align)
{
	m_align = align;
	return *this;
}

pxStaticText& pxStaticText::Bold()
{
	wxFont bold(GetFont());
	bold.SetWeight(wxFONTWEIGHT_BOLD);
	SetFont(bold);
	return *this;
}

pxStaticText& pxStaticText::PaddingPixH(int pixels)
{
	m_paddingPix_horiz = pixels;
	UpdateWrapping(false);
	Refresh();
	return *this;
}

pxStaticText& pxStaticText::PaddingPixV(int pixels)
{
	m_paddingPix_vert = pixels;
	Refresh();
	return *this;
}

pxStaticText& pxStaticText::PaddingPctH(float pct)
{
	pxAssert(pct < 0.5);

	m_paddingPct_horiz = pct;
	UpdateWrapping(false);
	Refresh();
	return *this;
}

pxStaticText& pxStaticText::PaddingPctV(float pct)
{
	pxAssert(pct < 0.5);

	m_paddingPct_vert = pct;
	Refresh();
	return *this;
}

pxStaticText& pxStaticText::Unwrapped()
{
	m_autowrap = false;
	UpdateWrapping(false);
	return *this;
}

int pxStaticText::calcPaddingWidth(int newWidth) const
{
	return (int)(newWidth * m_paddingPct_horiz * 2) + (m_paddingPix_horiz * 2);
}

int pxStaticText::calcPaddingHeight(int newHeight) const
{
	return (int)(newHeight * m_paddingPct_vert * 2) + (m_paddingPix_vert * 2);
}

wxSize pxStaticText::GetBestWrappedSize(const wxClientDC& dc) const
{
	pxAssert(m_autowrap);

	// Find an ideal(-ish) width, based on a search of all parent controls and their
	// valid Minimum sizes.

	int idealWidth = wxDefaultCoord;
	int parentalAdjust = 0;
	double parentalFactor = 1.0;
	const wxWindow* millrun = this;

	while (millrun)
	{
		// IMPORTANT : wxWizard changes its min size and then expects everything else
		// to play nice and NOT resize according to the new min size.  (wtf stupid)
		// Anyway, this fixes it -- ignore min size specifier on wxWizard!
		if (wxIsKindOf(millrun, wxWizard))
			break;

		int min = (int)((millrun->GetMinWidth() - parentalAdjust) * parentalFactor);

		if (min > 0 && ((idealWidth < 0) || (min < idealWidth)))
		{
			idealWidth = min;
		}

		parentalAdjust += pxSizerFlags::StdPadding * 2;
		millrun = millrun->GetParent();
	}

	if (idealWidth <= 0)
	{
		// FIXME: The minimum size of this control is unknown, so let's just pick a guess based on
		// the size of the user's display area.

		idealWidth = (int)(wxGetDisplaySize().GetWidth() * 0.66) - (parentalAdjust * 2);
	}

	return dc.GetMultiLineTextExtent(pxTextWrapper().Wrap(this, m_label, idealWidth - calcPaddingWidth(idealWidth)).GetResult());
}

pxStaticText& pxStaticText::WrapAt(int width)
{
	m_autowrap = false;

	if ((width <= 1) || (width == m_wrappedWidth))
		return *this;

	wxString wrappedLabel;
	m_wrappedWidth = width;

	if (width > 1)
		wrappedLabel = pxTextWrapper().Wrap(this, m_label, width).GetResult();

	if (m_wrappedLabel != wrappedLabel)
	{
		m_wrappedLabel = wrappedLabel;
		wxSize area = wxClientDC(this).GetMultiLineTextExtent(m_wrappedLabel);
		SetMinSize(wxSize(
			area.GetWidth() + calcPaddingWidth(area.GetWidth()),
			area.GetHeight() + calcPaddingHeight(area.GetHeight())));
	}
	return *this;
}

bool pxStaticText::_updateWrapping(bool textChanged)
{
	if (!m_autowrap)
	{
		//m_wrappedLabel = wxEmptyString;
		//m_wrappedWidth = -1;
		return false;
	}

	wxString wrappedLabel;
	int newWidth = GetSize().GetWidth();

	if (!textChanged && (newWidth == m_wrappedWidth))
		return false;

	// Note: during various stages of sizer-calc, width can be 1, 0, or -1.
	// We ignore wrapping in these cases.  (the PaintEvent also checks the wrapping
	// and updates it if needed, in case the control's size isn't figured out prior
	// to being painted).

	m_wrappedWidth = newWidth;
	if (m_wrappedWidth > 1)
		wrappedLabel = pxTextWrapper().Wrap(this, m_label, m_wrappedWidth).GetResult();

	if (m_wrappedLabel == wrappedLabel)
		return false;
	m_wrappedLabel = wrappedLabel;

	return true;
}

void pxStaticText::UpdateWrapping(bool textChanged)
{
	if (_updateWrapping(textChanged))
		Refresh();
}

void pxStaticText::SetLabel(const wxString& label)
{
	const bool labelChanged(label != m_label);
	if (labelChanged)
	{
		m_label = label;
		Refresh();
	}

	// Always update wrapping, in case window width or something else also changed.
	UpdateWrapping(labelChanged);
	InvalidateBestSize();
}

wxFont pxStaticText::GetFontOk() const
{
	wxFont font(GetFont());
	if (!font.Ok())
		return wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
	return font;
}

bool pxStaticText::Enable(bool enabled)
{
	if (_parent::Enable(enabled))
	{
		Refresh();
		return true;
	}
	return false;
}

void pxStaticText::paintEvent(wxPaintEvent& evt)
{
	wxPaintDC dc(this);
	const int dcWidth = dc.GetSize().GetWidth();
	const int dcHeight = dc.GetSize().GetHeight();
	if (dcWidth < 1)
		return;
	dc.SetFont(GetFontOk());

	if (IsEnabled())
		dc.SetTextForeground(GetForegroundColour());
	else
		dc.SetTextForeground(*wxLIGHT_GREY);

	pxWindowTextWriter writer(dc);
	writer.Align(m_align);

	const wxString& label(m_autowrap ? m_wrappedLabel : m_label);
	if (m_autowrap)
		_updateWrapping(false);

	int tWidth, tHeight;
	dc.GetMultiLineTextExtent(label, &tWidth, &tHeight);

	writer.Align(m_align);
	if (m_align & wxALIGN_CENTER_VERTICAL)
		writer.SetY((dcHeight - tHeight) / 2);
	else
		writer.SetY((int)(dcHeight * m_paddingPct_vert) + m_paddingPix_vert);

	writer.WriteLn(label); // without formatting please.

	//dc.SetBrush( *wxTRANSPARENT_BRUSH );
	//dc.DrawRectangle(wxPoint(), dc.GetSize());
}

// Overloaded form wxPanel and friends.
wxSize pxStaticText::DoGetBestSize() const
{
	wxClientDC dc(const_cast<pxStaticText*>(this));
	dc.SetFont(GetFontOk());

	wxSize best;

	if (m_autowrap)
	{
		best = GetBestWrappedSize(dc);
		//best.x = wxDefaultCoord;
	}
	else
	{
		// No autowrapping, so we can force a specific size here!
		best = dc.GetMultiLineTextExtent(GetLabel());
		best.x += calcPaddingWidth(best.x);
	}

	best.y += calcPaddingHeight(best.y);

	CacheBestSize(best);
	return best;
}

// --------------------------------------------------------------------------------------
//  pxStaticHeading  (implementations)
// --------------------------------------------------------------------------------------
pxStaticHeading::pxStaticHeading(wxWindow* parent, const wxString& label)
	: _parent(parent)
{
	m_align = wxALIGN_CENTER;

	SetPaddingDefaults();
	Init(label);
}

void pxStaticHeading::SetPaddingDefaults()
{
	m_paddingPix_horiz = 4;
	m_paddingPix_vert = 1;

	m_paddingPct_horiz = 0.08f;
	m_paddingPct_vert = 0.0f;
}

void operator+=(wxSizer& target, pxStaticText* src)
{
	if (src)
		target.Add(src, pxExpand);
}

void operator+=(wxSizer& target, pxStaticText& src)
{
	target.Add(&src, pxExpand);
}

void operator+=(wxSizer* target, pxStaticText& src)
{
	target->Add(&src, pxExpand);
}