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// krazy:excludeall=qclasses

#include "bookwindow.h"
#include "bookwrapper.h"
#include "bookdelegate.h"
#include "initdb.h"
#include "grantlee_paths.h"

#include <QtSql>

#include <grantlee_core.h>

BookWindow::BookWindow()
{
    ui.setupUi(this);

    if (!QSqlDatabase::drivers().contains("QSQLITE"))
        QMessageBox::critical(this, "Unable to load database", "This demo needs the SQLITE driver");

    // initialize the database
    QSqlError err = initDb();
    if (err.type() != QSqlError::NoError) {
        showError(err);
        return;
    }

    // Create the data model
    model = new QSqlRelationalTableModel(ui.bookTable);
    model->setEditStrategy(QSqlTableModel::OnManualSubmit);
    model->setTable("books");

    // Rememeber the indexes of the columns
    authorIdx = model->fieldIndex("author");
    genreIdx = model->fieldIndex("genre");

    // Set the relations to the other database tables
    model->setRelation(authorIdx, QSqlRelation("authors", "id", "name"));
    model->setRelation(genreIdx, QSqlRelation("genres", "id", "name"));

    // Set the localized header captions
    model->setHeaderData(authorIdx, Qt::Horizontal, tr("Author Name"));
    model->setHeaderData(genreIdx, Qt::Horizontal, tr("Genre"));
    model->setHeaderData(model->fieldIndex("title"), Qt::Horizontal, tr("Title"));
    model->setHeaderData(model->fieldIndex("year"), Qt::Horizontal, tr("Year"));
    model->setHeaderData(model->fieldIndex("rating"), Qt::Horizontal, tr("Rating"));

    // Populate the model
    if (!model->select()) {
        showError(model->lastError());
        return;
    }

    // Set the model and hide the ID column
    ui.bookTable->setModel(model);
    ui.bookTable->setItemDelegate(new BookDelegate(ui.bookTable));
    ui.bookTable->setColumnHidden(model->fieldIndex("id"), true);
    ui.bookTable->setSelectionMode(QAbstractItemView::SingleSelection);

    // Initialize the Author combo box
    ui.authorEdit->setModel(model->relationModel(authorIdx));
    ui.authorEdit->setModelColumn(model->relationModel(authorIdx)->fieldIndex("name"));

    ui.genreEdit->setModel(model->relationModel(genreIdx));
    ui.genreEdit->setModelColumn(model->relationModel(genreIdx)->fieldIndex("name"));

    QDataWidgetMapper *mapper = new QDataWidgetMapper(this);
    mapper->setModel(model);
    mapper->setItemDelegate(new BookDelegate(this));
    mapper->addMapping(ui.titleEdit, model->fieldIndex("title"));
    mapper->addMapping(ui.yearEdit, model->fieldIndex("year"));
    mapper->addMapping(ui.authorEdit, authorIdx);
    mapper->addMapping(ui.genreEdit, genreIdx);
    mapper->addMapping(ui.ratingEdit, model->fieldIndex("rating"));

    connect(ui.bookTable->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
            mapper, SLOT(setCurrentModelIndex(QModelIndex)));

    ui.bookTable->setCurrentIndex(model->index(0, 0));

    ui.exportTheme->insertItems(0, QStringList() << "simple" << "coloured" << "simple2" << "coloured2" );

    connect(ui.exportButton, SIGNAL(pressed()), SLOT(renderBooks()));

    m_engine = new Grantlee::Engine();
    Grantlee::FileSystemTemplateLoader::Ptr loader = Grantlee::FileSystemTemplateLoader::Ptr( new Grantlee::FileSystemTemplateLoader() );
    loader->setTemplateDirs( QStringList() << GRANTLEE_TEMPLATE_PATH );
    m_engine->addTemplateLoader(loader);

    m_engine->setPluginPaths( QStringList() << GRANTLEE_PLUGIN_PATH );
}

void BookWindow::showError(const QSqlError &err)
{
    QMessageBox::critical(this, "Unable to initialize Database",
                "Error initializing database: " + err.text());
}

void BookWindow::renderBooks()
{
    int rows = model->rowCount();
    QVariantHash mapping;
    QVariantList bookList;
    for (int row = 0; row < rows; ++row)
    {
      QString title = model->index(row, 1).data().toString();
      QString author = model->index(row, 2).data().toString();
      QString genre = model->index(row, 3).data().toString();
      int rating = model->index(row, 5).data().toInt();
      QObject *book = new BookWrapper(author, title, genre, rating, this);
      QVariant var = QVariant::fromValue(book);
      bookList.append(var);
    }
    mapping.insert("books", bookList);

    QString themeName = ui.exportTheme->currentText();

    Grantlee::Context c(mapping);

    Grantlee::Template t = m_engine->loadByName( themeName + ".html" );
    if (!t)
    {
      QMessageBox::critical(this, "Unable to load template",
                QString( "Error loading template: %1" ).arg( themeName + ".html" ) );
      return;
    }

    if ( t->error() )
    {
      QMessageBox::critical(this, "Unable to load template",
                QString( "Error loading template: %1" ).arg( t->errorString() ) );
      return;
    }

    bool ok;
    QString text = QInputDialog::getText(this, tr("Export Location"),
                                         tr("file name:"), QLineEdit::Normal,
                                         QDir::home().absolutePath() + "/book_export.html", &ok);
    if (!ok || text.isEmpty())
      return;

    QFile file( text );
    if ( !file.open( QIODevice::WriteOnly | QIODevice::Text ) )
      return;

    QString content = t->render(&c);

    if ( t->error() )
    {
      QMessageBox::critical(this, "Unable render template",
                QString( "Error rendering template: %1" ).arg( t->errorString() ) );
      return;
    }

    file.write(content.toLocal8Bit());
    file.close();

}

#include "bookwindow.moc"

