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#include "textdocument.h"
#include <coreplugin/editormanager/editormanager.h>

#include <QDebug>
#include <QTextCodec>

/*!
    \class Core::TextDocument
    \brief The TextDocument class is a very general base class for documents that work with text.

    This class contains helper methods for saving and reading text files with encoding and
    line ending settings.

    \sa Utils::TextFileUtils
*/

enum { debug = 0 };

namespace Core {

namespace Internal {
class TextDocumentPrivate
{
public:
    TextDocumentPrivate() : m_readResult(Utils::TextFileFormat::ReadSuccess) {}

    Utils::TextFileFormat m_format;
    Utils::TextFileFormat::ReadResult m_readResult;
    QByteArray m_decodingErrorSample;
};

} // namespace Internal

TextDocument::TextDocument(QObject *parent) :
    IDocument(parent), d(new Internal::TextDocumentPrivate)
{
    setCodec(Core::EditorManager::defaultTextCodec());
}

TextDocument::~TextDocument()
{
    delete d;
}

bool TextDocument::hasDecodingError() const
{
    return d->m_readResult == Utils::TextFileFormat::ReadEncodingError;
}

QByteArray TextDocument::decodingErrorSample() const
{
    return d->m_decodingErrorSample;
}

/*!
    Writes out text using the format obtained from the last read.
*/

bool TextDocument::write(const QString &fileName, const QString &data, QString *errorMessage) const
{
    return write(fileName, format(), data, errorMessage);
}

/*!
    Writes out text using a custom \a format.
*/

bool TextDocument::write(const QString &fileName, const Utils::TextFileFormat &format, const QString &data, QString *errorMessage) const
{
    if (debug)
        qDebug() << Q_FUNC_INFO << this << fileName;
    return format.writeFile(fileName, data, errorMessage);
}

/*!
    Autodetects format and reads in the text file specified by \a fileName.
*/

TextDocument::ReadResult TextDocument::read(const QString &fileName, QStringList *plainTextList, QString *errorString)
{
    d->m_readResult =
        Utils::TextFileFormat::readFile(fileName, codec(),
                                        plainTextList, &d->m_format, errorString, &d->m_decodingErrorSample);
    return d->m_readResult;
}

/*!
    Autodetects format and reads in the text file specified by \a fileName.
*/

TextDocument::ReadResult TextDocument::read(const QString &fileName, QString *plainText, QString *errorString)
{
    d->m_readResult =
        Utils::TextFileFormat::readFile(fileName, codec(),
                                        plainText, &d->m_format, errorString, &d->m_decodingErrorSample);
    return d->m_readResult;
}

const QTextCodec *TextDocument::codec() const
{
    return d->m_format.codec;
}

void TextDocument::setCodec(const QTextCodec *codec)
{
    if (debug)
        qDebug() << Q_FUNC_INFO << this << (codec ? codec->name() : QByteArray());
    d->m_format.codec = codec;
}

void TextDocument::switchUtf8Bom()
{
    if (debug)
        qDebug() << Q_FUNC_INFO << this << "UTF-8 BOM: " << !d->m_format.hasUtf8Bom;
    d->m_format.hasUtf8Bom = !d->m_format.hasUtf8Bom;
}

/*!
    Returns the format obtained from the last call to \c read().
*/

Utils::TextFileFormat TextDocument::format() const
{
    return d->m_format;
}

} // namespace Core