#include <algorithm>
#include <QString>
#include <QChar>
#include "scintillaeditor.h"
#include "Preferences.h"

ScintillaEditor::ScintillaEditor(QWidget *parent) : EditorInterface(parent)
{
  scintillaLayout = new QVBoxLayout(this);
  qsci = new QsciScintilla(this);
  scintillaLayout->setContentsMargins(0, 0, 0, 0);
  scintillaLayout->addWidget(qsci);
  qsci->setBraceMatching (QsciScintilla::SloppyBraceMatch);
  qsci->setWrapMode(QsciScintilla::WrapWord);
  qsci->setWrapVisualFlags(QsciScintilla::WrapFlagByText, QsciScintilla::WrapFlagByText, 0);
  qsci->setAutoIndent(true);
  qsci->indicatorDefine(QsciScintilla::RoundBoxIndicator, indicatorNumber);
  qsci->markerDefine(QsciScintilla::Circle, markerNumber);
  qsci->setUtf8(true);
  preferenceEditorOption = Preferences::inst()->getValue("editor/syntaxhighlight").toString();
  lexer = new ScadLexer(this);
  initLexer();
  initMargin();
  qsci->setFolding(QsciScintilla::BoxedTreeFoldStyle, 4);
  qsci->setCaretLineVisible(true);
  this->setHighlightScheme(preferenceEditorOption);	
	
}

void ScintillaEditor::setPlainText(const QString &text)
{
  qsci->setText(text); 
}

QString ScintillaEditor::toPlainText()
{
  return qsci->text();
}

bool ScintillaEditor::isContentModified()
{
  return qsci->isModified();
}

void ScintillaEditor::highlightError(int error_pos) 
{
  int line, index;
  qsci->lineIndexFromPosition(error_pos, &line, &index);
  qsci->fillIndicatorRange(line, index, line, index+1, indicatorNumber);	
  qsci->setIndicatorForegroundColor(QColor(255,0,0,100));
  qsci->markerAdd(line, markerNumber);
}

void ScintillaEditor::unhighlightLastError() 
{
  int totalLength = qsci->text().length();
  int line, index;
  qsci->lineIndexFromPosition(totalLength, &line, &index);
  qsci->clearIndicatorRange(0, 0, line, index, indicatorNumber);
  qsci->markerDeleteAll(markerNumber);
}

//Editor themes
void ScintillaEditor::forLightBackground()
{
  lexer->setPaper("#fff");
  lexer->setColor(QColor("#272822")); // -> Style: Default text
  lexer->setColor(QColor("Green"), QsciLexerCPP::Keyword);	    // -> Style: Keyword	
  lexer->setColor(QColor("Green"), QsciLexerCPP::KeywordSet2);	    // -> Style: KeywordSet2
  lexer->setColor(Qt::blue, QsciLexerCPP::CommentDocKeyword);	    // -> used in comments only like /*! \cube */
  lexer->setColor(QColor("DarkBlue"), QsciLexerCPP::GlobalClass);	    // -> Style: GlobalClass
  lexer->setColor(Qt::blue, QsciLexerCPP::Operator);
  lexer->setColor(Qt::darkMagenta, QsciLexerCPP::DoubleQuotedString);	
  lexer->setColor(Qt::darkCyan, QsciLexerCPP::Comment);
  lexer->setColor(Qt::darkCyan, QsciLexerCPP::CommentLine);
  lexer->setColor(QColor("DarkRed"), QsciLexerCPP::Number);
  qsci->setMarkerBackgroundColor(QColor(255, 0, 0, 100), markerNumber);
  qsci->setCaretLineBackgroundColor(QColor("#ffe4e4"));
  qsci->setMarginsBackgroundColor(QColor("#ccc"));
  qsci->setMarginsForegroundColor(QColor("#111"));
}

void ScintillaEditor::forDarkBackground()
{
  lexer->setPaper(QColor("#272822"));
  lexer->setColor(QColor(Qt::white));          
  lexer->setColor(QColor("#f12971"), QsciLexerCPP::Keyword);
  lexer->setColor(QColor("#56dbf0"),QsciLexerCPP::KeywordSet2);	
  lexer->setColor(QColor("#ccdf32"), QsciLexerCPP::CommentDocKeyword);
  lexer->setColor(QColor("#56d8f0"), QsciLexerCPP::GlobalClass); 
  lexer->setColor(QColor("#d8d8d8"), QsciLexerCPP::Operator);
  lexer->setColor(QColor("#e6db74"), QsciLexerCPP::DoubleQuotedString);	
  lexer->setColor(QColor("#e6db74"), QsciLexerCPP::CommentLine);
  lexer->setColor(QColor("#af7dff"), QsciLexerCPP::Number);
  qsci->setCaretLineBackgroundColor(QColor(104,225,104, 127));
  qsci->setMarkerBackgroundColor(QColor(255, 0, 0, 100), markerNumber);
  qsci->setMarginsBackgroundColor(QColor("20,20,20,150"));
  qsci->setMarginsForegroundColor(QColor("#fff"));

}

void ScintillaEditor::Monokai()
{
  lexer->setPaper("#272822");
  lexer->setColor(QColor("#f8f8f2")); // -> Style: Default text
  lexer->setColor(QColor("#66c3b3"), QsciLexerCPP::Keyword);	    // -> Style: Keyword	
  lexer->setColor(QColor("#79abff"), QsciLexerCPP::KeywordSet2);	    // -> Style: KeywordSet2
  lexer->setColor(QColor("#ccdf32"), QsciLexerCPP::CommentDocKeyword);	    // -> used in comments only like /*! \cube */
  lexer->setColor(QColor("#ffffff"), QsciLexerCPP::GlobalClass);	    // -> Style: GlobalClass
  lexer->setColor(QColor("#d8d8d8"), QsciLexerCPP::Operator);
  lexer->setColor(QColor("#e6db74"), QsciLexerCPP::DoubleQuotedString);	
  lexer->setColor(QColor("#75715e"), QsciLexerCPP::CommentLine);
  lexer->setColor(QColor("#7fb347"), QsciLexerCPP::Number);
  qsci->setMarkerBackgroundColor(QColor(255, 0, 0, 100), markerNumber);
  qsci->setCaretLineBackgroundColor(QColor("#3e3d32"));
  qsci->setMarginsBackgroundColor(QColor("#757575"));
  qsci->setMarginsForegroundColor(QColor("#f8f8f2"));
}

void ScintillaEditor::Solarized_light()
{
  lexer->setPaper("#fdf6e3");
  lexer->setColor(QColor("#657b83")); // -> Style: Default text
  lexer->setColor(QColor("#268ad1"), QsciLexerCPP::Keyword);	    // -> Style: Keyword	
  lexer->setColor(QColor("#6c71c4"), QsciLexerCPP::KeywordSet2);	    // -> Style: KeywordSet2
  lexer->setColor(QColor("#b58900"), QsciLexerCPP::CommentDocKeyword);	    // -> used in comments only like /*! \cube */
  lexer->setColor(QColor("#b58800"), QsciLexerCPP::GlobalClass);	    // -> Style: GlobalClass
  lexer->setColor(QColor("#859900"), QsciLexerCPP::Operator);
  lexer->setColor(QColor("#2aa198"), QsciLexerCPP::DoubleQuotedString);	
  lexer->setColor(QColor("#b58800"), QsciLexerCPP::CommentLine);
  lexer->setColor(QColor("#cb4b16"), QsciLexerCPP::Number);
  qsci->setMarkerBackgroundColor(QColor(255, 0, 0, 100), markerNumber);
  qsci->setCaretLineBackgroundColor(QColor("#eeead5"));
  qsci->setMarginsBackgroundColor(QColor("#eee8d5"));
  qsci->setMarginsForegroundColor(QColor("#93a1a1"));
}

void ScintillaEditor::noColor()
{
  lexer->setPaper(Qt::white);
  lexer->setColor(Qt::black);
  qsci->setMarginsBackgroundColor(QColor("#ccc"));
  qsci->setMarginsForegroundColor(QColor("#111"));
	
}
void ScintillaEditor::setHighlightScheme(const QString &name)
{

  if(name == "For Light Background")
    {
      forLightBackground();
    }
  else if(name == "For Dark Background")
    {
      forDarkBackground();
    }
  else if(name == "Monokai")
    {
      Monokai();
    }
  else if(name == "Solarized")
    {
      Solarized_light();
    }
  else if(name == "Off")
    {
      noColor();
    }
}

void ScintillaEditor::insertPlainText(const QString &text)
{
  qsci->setText(text); 
}

void ScintillaEditor::undo()
{
  qsci->undo(); 
}

void ScintillaEditor::redo()
{
  qsci->redo(); 
}

void ScintillaEditor::cut()
{
  qsci->cut();
}

void ScintillaEditor::copy()
{
  qsci->copy(); 
}

void ScintillaEditor::paste()
{ 
  qsci->paste();
}

void ScintillaEditor::zoomIn()
{
  qsci->zoomIn(); 
}

void ScintillaEditor::zoomOut() 
{
  qsci->zoomOut(); 
}

void ScintillaEditor::initFont(const QString& fontName, uint size)
{
  QFont font(fontName, size);
  font.setFixedPitch(true);
  lexer->setFont(font);
}

void ScintillaEditor::initLexer()
{
  qsci->setLexer(lexer);
}

void ScintillaEditor::initMargin()
{
  QFontMetrics fontmetrics = QFontMetrics(qsci->font());
  qsci->setMarginsFont(qsci->font());
  qsci->setMarginWidth(0, fontmetrics.width(QString::number(qsci->lines())) + 6);
  qsci->setMarginLineNumbers(0, true);
 
  connect(qsci, SIGNAL(textChanged()), this, SLOT(onTextChanged()));
}

void ScintillaEditor::onTextChanged()
{
  QFontMetrics fontmetrics = qsci->fontMetrics();
  qsci->setMarginWidth(0, fontmetrics.width(QString::number(qsci->lines())) + 6);
}

bool ScintillaEditor::find(const QString &expr, bool findNext, bool findBackwards)
{
  int startline = -1, startindex = -1;

  // If findNext, start from the end of the current selection
  if (qsci->hasSelectedText()) {
    int lineFrom, indexFrom, lineTo, indexTo;
    qsci->getSelection(&lineFrom, &indexFrom, &lineTo, &indexTo);
    
    startline = !(findBackwards xor findNext) ? std::min(lineFrom, lineTo) : std::max(lineFrom, lineTo);
    startindex = !(findBackwards xor findNext) ? std::min(indexFrom, indexTo) : std::max(indexFrom, indexTo);
  }

  return qsci->findFirst(expr, false, false, false, true, 
                         !findBackwards, startline, startindex);
}

void ScintillaEditor::replaceSelectedText(QString& newText)
{
  qsci->replaceSelectedText(newText);
}