/*  This file is part of whyblocked.
 *  Copyright © 2018 tastytea <tastytea@tastytea.de>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, version 3.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <regex>
#include <QMessageBox>
#include <QDebug>
#include "version.hpp"
#include "whyblocked.hpp"
#include "interface_qt.hpp"

MainWindow::MainWindow(QMainWindow *parent) : QMainWindow(parent)
{
    setupUi(this);

    _model = new QStandardItemModel;
    tableview->setModel(_model);
    tableview->setSelectionBehavior(QAbstractItemView::SelectRows);
    populate_tableview();

    connect(action_add, &QAction::triggered, this, &MainWindow::add);
    connect(action_remove, &QAction::triggered, this, &MainWindow::remove);
    connect(action_reload, &QAction::triggered, this, &MainWindow::populate_tableview);
    connect(action_about, &QAction::triggered, this, &MainWindow::about);
    connect(action_quit, &QAction::triggered, this, &MainWindow::close);

    connect(tableview, &QTableView::clicked, this, &MainWindow::show_details);
    connect(tableview, &QTableView::activated, this, &MainWindow::show_details);
}

void MainWindow::populate_tableview()
{
    _model->clear();
    result_view result;
    if (view(result))
    {
        for (const std::tuple<string, int, string> &line : result)
        {
            add_row(QString::fromStdString(std::get<0>(line)),
                    std::get<1>(line),
                    QString::fromStdString(std::get<2>(line)));
        }
    }

    _model->setHeaderData(0, Qt::Horizontal, tr("User/Instance"));
    _model->setHeaderData(1, Qt::Horizontal, tr("Blocked/Silenced?"));
    _model->setHeaderData(2, Qt::Horizontal, tr("Reason"));
    tableview->horizontalHeader()->resizeSection(0, 300);

    statusBar()->showMessage(tr("Database loaded."));
}

void MainWindow::add_row(const QString &user, const int &blocked, const QString &reason)
{
    QList<QStandardItem*> items;
    items.append(new QStandardItem(user));
    if (blocked == 1)
    {
        items.append(new QStandardItem(QString(tr("blocked"))));
    }
    else
    {
        items.append(new QStandardItem(QString(tr("silenced"))));
    }
    items.append(new QStandardItem(reason));
    _model->appendRow(items);
}

void MainWindow::add()
{
    DialogAdd *dialog = new DialogAdd(this);
    dialog->show();
}

void MainWindow::remove()
{
    QItemSelectionModel *selection = tableview->selectionModel();
    if (selection->hasSelection())
    {
        for (auto &row : selection->selectedRows())
        {
            const string user = row.data().toString().toStdString();
            ::remove(user);
            statusBar()->showMessage(tr("Removed %1 from database.")
                                     .arg(QString::fromStdString(user)));
            _model->removeRow(row.row());
        }
        label_receipts->clear();
    }
    else
    {
        statusBar()->showMessage(tr("Select data to remove."));
    }
}

void MainWindow::about()
{
    QMessageBox::about(this, tr("About whyblocked"),
        tr("<p><b>whyblocked</b> %1</p>"
           "<p>Reminds you why you blocked someone.</p>"
           "<p>Sourcecode: <a href=\"https://schlomp.space/tastytea/whyblocked\">"
           "https://schlomp.space/tastytea/whyblocked</a></p>"
           "<p><small>Copyright © 2018 <a href=\"mailto:tastytea@tastytea.de\">tastytea</a>.<br>"
           "Licence GPLv3: <a href=\"https://www.gnu.org/licenses/gpl-3.0.html\">"
           "GNU GPL version 3</a>.<br>"
           "This program comes with ABSOLUTELY NO WARRANTY. This is free software,"
           "and you are welcome to redistribute it under certain conditions.</small></p>")
        .arg(global::version));
}

void MainWindow::show_details(QModelIndex index)
{
    const string user = index.sibling(index.row(), 0).data().toString().toStdString();
    result_details result;
    string text = "";

    if (details(user, result))
    {
        if (!std::get<2>(result).empty())
        {
            text += "<b>Receipts:</b>";
            for (const string &url : std::get<2>(result))
            {
                text += "<br>" + url;
            }
            text = urls_to_hyperlinks(text);
        }
        label_receipts->setText(QString::fromStdString((text)));
    }
}

const string MainWindow::urls_to_hyperlinks(const string &text)
{
    std::regex re_url("((https?|gopher|ftps?)\\://[^ <]*)");
    return std::regex_replace(text, re_url, "<a href=\"$1\">$1</a>");
}

DialogAdd::DialogAdd(QMainWindow *parent)
: QDialog(parent)
, _parent(static_cast<MainWindow*>(parent))
{
    setupUi(this);

    connect(button_receipt_add, &QPushButton::clicked, this, &DialogAdd::add_receipt);
    connect(button_receipt_remove, &QPushButton::clicked, this, &DialogAdd::remove_receipt);
}

const dialogdata DialogAdd::get_data()
{
    std::vector<string> receipts;
    for (int row = 0; row <= list_receipts->count() - 1; ++row)
    {
        receipts.push_back(list_receipts->item(row)->text().toStdString());
    }

    return std::make_tuple(text_user->text().toStdString(),
                           radio_blocked->isChecked(),
                           text_reason->text().toStdString(),
                           receipts);
}

void DialogAdd::add_receipt()
{
    QListWidgetItem *item = new QListWidgetItem(tr("Insert receipt here."));
    item->setFlags(item->flags() | Qt::ItemIsEditable);
    list_receipts->insertItem(list_receipts->count(), item);
    list_receipts->editItem(item);
}

void DialogAdd::remove_receipt()
{
    for (auto item :list_receipts->selectedItems())
    {
        delete item;
    }
}

void DialogAdd::accept()
{
    auto data = get_data();
    const string user = std::get<0>(data);
    const int blocked = static_cast<int>(std::get<1>(data));
    const string reason = std::get<2>(data);

    if (user.empty())
    {
        return;
    }
    ::add_block(user, blocked, reason);
    _parent->add_row(QString::fromStdString(user),
                     blocked,
                     QString::fromStdString(reason));
    for (const string &receipt : std::get<3>(data))
    {
        ::add_url(user, receipt);
    }

    _parent->statusBar()->showMessage(tr("Added %1 to database.")
                                      .arg(QString::fromStdString(user)));

    delete this;
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QCoreApplication::setApplicationName("whyblocked");

    MainWindow win;
    win.show();

    return app.exec();
}