#include <QCoreApplication>
#include <QDir>
#include <QDebug>

#include <grantlee/engine.h>
#include <grantlee/templateloader.h>

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);

    QString templatesDir = QDir::currentPath();
    if (argc > 1) {
        templatesDir = QString::fromLocal8Bit(argv[1]);
    }

    Grantlee::Engine engine;
    auto loader = QSharedPointer<Grantlee::FileSystemTemplateLoader>::create();
    loader->setTemplateDirs(QStringList() << templatesDir);
    engine.addTemplateLoader(loader);

    QDir d(templatesDir);
    QStringList files = d.entryList(QStringList() << QStringLiteral("*.grantlee"), QDir::Files);
    if (files.isEmpty()) {
        qDebug() << "No .grantlee templates found in" << templatesDir;
        // Treat absence as successful parse (nothing to check) to avoid failing
        // when directory is empty in different setups.
        return 0;
    }

    bool ok = true;
    for (const QString &f : files) {
        Grantlee::Template t;
        try {
            t = engine.loadByName(f);
        } catch (...) {
            qDebug() << "Exception while loading" << f;
            ok = false;
            continue;
        }
        if (!t) {
            qDebug() << "Failed to load template" << f;
            ok = false;
            continue;
        }
        if (t->error() != Grantlee::NoError) {
            qDebug() << "Parse error in" << f << ":" << t->errorString();
            ok = false;
            continue;
        }
        // Render with empty context to ensure rendering path also works.
        Grantlee::Context ctx;
        QString out = t->render(&ctx);
        if (out.isNull()) {
            qDebug() << "Rendering produced null for" << f;
            ok = false;
            continue;
        }
    }

    return ok ? 0 : 2;
}