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#include "cppwriteincludes.h"

#include "driver.h"

#include "ui4.h"

#include "uic.h"

#include "databaseinfo.h"

#include <QtCore/QDebug>

#include <QtCore/QFileInfo>

#include <QtCore/QTextStream>

#include <stdio.h>

QT_BEGIN_NAMESPACE

enum { debugWriteIncludes = 0 };

enum { warnHeaderGeneration = 0 };

struct ClassInfoEntry

{

    const char *klass;

    const char *module;

    const char *header;

};

static const ClassInfoEntry qclass_lib_map[] = {

#define QT_CLASS_LIB(klass, module, header) { #klass, #module, #header },

#include "qclass_lib_map.h"

#undef QT_CLASS_LIB

};

// Format a module header as 'QtCore/QObject'

static inline QString moduleHeader(const QString &module, const QString &header)

{

    QString rc = module;

    rc += QLatin1Char('/');

    rc += header;

    return rc;

}

namespace CPP {

WriteIncludes::WriteIncludes(Uic *uic)

  : m_uic(uic), m_output(uic->output()), m_scriptsActivated(false)

{

    // When possible (no namespace) use the "QtModule/QClass" convention

    // and create a re-mapping of the old header "qclass.h" to it. Do not do this

    // for the "Phonon::Someclass" classes, however.

    const QString namespaceDelimiter = QLatin1String("::");

    const ClassInfoEntry *classLibEnd = qclass_lib_map + sizeof(qclass_lib_map)/sizeof(ClassInfoEntry);    

    for(const ClassInfoEntry *it = qclass_lib_map; it < classLibEnd;  ++it) {        

        const QString klass = QLatin1String(it->klass);

        const QString module = QLatin1String(it->module);

        QLatin1String header = QLatin1String(it->header);

        if (klass.contains(namespaceDelimiter)) {

            m_classToHeader.insert(klass, moduleHeader(module, header));

        } else {

            const QString newHeader = moduleHeader(module, klass);

            m_classToHeader.insert(klass, newHeader);

            m_oldHeaderToNewHeader.insert(header, newHeader);

        }

    }

}

void WriteIncludes::acceptUI(DomUI *node)

{

    m_scriptsActivated = false;

    m_localIncludes.clear();

    m_globalIncludes.clear();

    m_knownClasses.clear();

    m_includeBaseNames.clear();

    if (node->elementIncludes())

        acceptIncludes(node->elementIncludes());

    if (node->elementCustomWidgets())

        TreeWalker::acceptCustomWidgets(node->elementCustomWidgets());

    add(QLatin1String("QApplication"));

    add(QLatin1String("QVariant"));

    add(QLatin1String("QAction"));

    add(QLatin1String("QButtonGroup")); // ### only if it is really necessary

    add(QLatin1String("QHeaderView"));

    if (m_uic->hasExternalPixmap() && m_uic->pixmapFunction() == QLatin1String("qPixmapFromMimeSource")) {

#ifdef QT_NO_QT3_SUPPORT

        qWarning("Warning: The form file has external pixmaps or qPixmapFromMimeSource() set as a pixmap function. "

                 "This requires Qt 3 support, which is disabled. The resulting code will not compile.");

#endif

        add(QLatin1String("Q3MimeSourceFactory"));

    }

    if (m_uic->databaseInfo()->connections().size()) {

        add(QLatin1String("QSqlDatabase"));

        add(QLatin1String("Q3SqlCursor"));

        add(QLatin1String("QSqlRecord"));

        add(QLatin1String("Q3SqlForm"));

    }

    TreeWalker::acceptUI(node);

    writeHeaders(m_globalIncludes, true);

    writeHeaders(m_localIncludes, false);

    m_output << QLatin1Char('\n');

}

void WriteIncludes::acceptWidget(DomWidget *node)

{

    if (debugWriteIncludes)

        fprintf(stderr, "%s '%s'\n", Q_FUNC_INFO, qPrintable(node->attributeClass()));

    add(node->attributeClass());

    TreeWalker::acceptWidget(node);

}

void WriteIncludes::acceptLayout(DomLayout *node)

{

    add(node->attributeClass());

    TreeWalker::acceptLayout(node);

}

void WriteIncludes::acceptSpacer(DomSpacer *node)

{

    add(QLatin1String("QSpacerItem"));

    TreeWalker::acceptSpacer(node);

}

void WriteIncludes::acceptProperty(DomProperty *node)

{

    if (node->kind() == DomProperty::Date)

        add(QLatin1String("QDate"));

    if (node->kind() == DomProperty::Locale)

        add(QLatin1String("QLocale"));

    TreeWalker::acceptProperty(node);

}

void WriteIncludes::insertIncludeForClass(const QString &className, QString header, bool global)

{

    if (debugWriteIncludes)

        fprintf(stderr, "%s %s '%s' %d\n", Q_FUNC_INFO, qPrintable(className), qPrintable(header), global);

    do {

        if (!header.isEmpty())

            break;

        // Known class        

        const StringMap::const_iterator it = m_classToHeader.constFind(className);

        if (it != m_classToHeader.constEnd()) {

            header = it.value();

            global =  true;

            break;

        }

        // Quick check by class name to detect includehints provided for custom widgets.

        // Remove namespaces

        QString lowerClassName = className.toLower();

        static const QString namespaceSeparator = QLatin1String("::");

        const int namespaceIndex = lowerClassName.lastIndexOf(namespaceSeparator);

        if (namespaceIndex != -1)

            lowerClassName.remove(0, namespaceIndex + namespaceSeparator.size());

        if (m_includeBaseNames.contains(lowerClassName)) {

            header.clear();

            break;

        }

        // Last resort: Create default header

        if (!m_uic->option().implicitIncludes)

            break;

        header = lowerClassName;

        header += QLatin1String(".h");

        if (warnHeaderGeneration) {

            qWarning("Warning: generated header '%s' for class '%s'.", qPrintable(header),

                     qPrintable(className));

        }

        global = true;

    } while (false);

    if (!header.isEmpty())

        insertInclude(header, global);

}

void WriteIncludes::add(const QString &className, bool determineHeader, const QString &header, bool global)

{

    if (debugWriteIncludes)

            fprintf(stderr, "%s %s '%s' %d\n", Q_FUNC_INFO, qPrintable(className), qPrintable(header), global);

    if (className.isEmpty() || m_knownClasses.contains(className))

        return;

    m_knownClasses.insert(className);

    if (className == QLatin1String("Line")) { // ### hmm, deprecate me!

        add(QLatin1String("QFrame"));

        return;

    }

    if (m_uic->customWidgetsInfo()->extends(className, QLatin1String("Q3ListView"))  ||

        m_uic->customWidgetsInfo()->extends(className, QLatin1String("Q3Table"))) {

        add(QLatin1String("Q3Header"));

    }

    if (determineHeader)

        insertIncludeForClass(className, header, global);

}

void WriteIncludes::acceptCustomWidget(DomCustomWidget *node)

{

    const QString className = node->elementClass();

    if (className.isEmpty())

        return;

    if (const DomScript *domScript = node->elementScript())

        if (!domScript->text().isEmpty())

            activateScripts();

    if (!node->elementHeader() || node->elementHeader()->text().isEmpty()) {

        add(className, false); // no header specified

    } else {

        // custom header unless it is a built-in qt class

        QString header;

        bool global = false;

        if (!m_classToHeader.contains(className)) {

            global = node->elementHeader()->attributeLocation().toLower() == QLatin1String("global");

            header = node->elementHeader()->text();

        }

        add(className, true, header, global);

    }

}

void WriteIncludes::acceptCustomWidgets(DomCustomWidgets *node)

{

    Q_UNUSED(node);

}

void WriteIncludes::acceptIncludes(DomIncludes *node)

{

    TreeWalker::acceptIncludes(node);

}

void WriteIncludes::acceptInclude(DomInclude *node)

{

    bool global = true;

    if (node->hasAttributeLocation())

        global = node->attributeLocation() == QLatin1String("global");

    insertInclude(node->text(), global);

}

void WriteIncludes::insertInclude(const QString &header, bool global)

{

    if (debugWriteIncludes)

        fprintf(stderr, "%s %s %d\n", Q_FUNC_INFO, qPrintable(header), global);

    OrderedSet &includes = global ?  m_globalIncludes : m_localIncludes;

    if (includes.contains(header))

        return;

    // Insert. Also remember base name for quick check of suspicious custom plugins

    includes.insert(header, false);

    const QString lowerBaseName = QFileInfo(header).completeBaseName ().toLower();

    m_includeBaseNames.insert(lowerBaseName);

}

void WriteIncludes::writeHeaders(const OrderedSet &headers, bool global)

{

    const QChar openingQuote = global ? QLatin1Char('<') : QLatin1Char('"');

    const QChar closingQuote = global ? QLatin1Char('>') : QLatin1Char('"');

    // Check for the old headers 'qslider.h' and replace by 'QtGui/QSlider'

    const OrderedSet::const_iterator cend = headers.constEnd();

    for (OrderedSet::const_iterator sit = headers.constBegin(); sit != cend; ++sit) {

        const StringMap::const_iterator hit = m_oldHeaderToNewHeader.constFind(sit.key());

        const bool mapped =  hit != m_oldHeaderToNewHeader.constEnd();

        const  QString header =  mapped ? hit.value() : sit.key();

        if (!header.trimmed().isEmpty()) {

            m_output << "#include " << openingQuote << header << closingQuote << QLatin1Char('\n');

        }

    }

}

void WriteIncludes::acceptWidgetScripts(const DomScripts &scripts, DomWidget *, const  DomWidgets &)

{

    if (!scripts.empty()) {

        activateScripts();

    }

}

void WriteIncludes::activateScripts()

{

    if (!m_scriptsActivated) {

        add(QLatin1String("QScriptEngine"));

        add(QLatin1String("QDebug"));

        m_scriptsActivated = true;

    }

}

} // namespace CPP

QT_END_NAMESPACE