// Squawk messenger. 
// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
// 
// 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, either version 3 of the License, or
// (at your option) any later version.
// 
// 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 "omemo.h"
#include "ui_omemo.h"

#include <random>
constexpr uint8_t fingerprintLength = 32;

Omemo::Omemo(QWidget* parent):
    QWidget(parent),
    m_ui(new Ui::Omemo()),
    keysDelegate(),
    unusedKeysDelegate(),
    keysModel(),
    unusedKeysModel(),
    contextMenu(new QMenu())
{
    m_ui->setupUi(this);

    generateMockData();

    m_ui->keysView->setItemDelegate(&keysDelegate);
    m_ui->keysView->setModel(&keysModel);
    m_ui->unusedKeysView->setItemDelegate(&unusedKeysDelegate);
    m_ui->unusedKeysView->setModel(&unusedKeysModel);

    m_ui->keysView->setContextMenuPolicy(Qt::CustomContextMenu);
    connect(m_ui->keysView, &QWidget::customContextMenuRequested, this, &Omemo::onActiveKeysContextMenu);
}

Omemo::~Omemo()
{
    contextMenu->deleteLater();
}

void Omemo::generateMockData() {
    std::random_device rd;
    std::uniform_int_distribution<char> dist(CHAR_MIN, CHAR_MAX);
    for (int i = 0; i < 5; ++i) {
        QByteArray fp(fingerprintLength, 0);
        for (int i = 0; i < fingerprintLength; ++i) {
            fp[i] = dist(rd);
        }
        Shared::KeyInfo info;
        info.id = i;
        if (i % 3 == 0)
            info.label = QString("test_") + std::to_string(i).c_str();
        info.fingerPrint = fp;
        if (i % 2 == 0)
            info.lastInteraction = QDateTime::currentDateTime();

        keysModel.addKey(info);
    }
}

void Omemo::onActiveKeysContextMenu(const QPoint& pos) {
    contextMenu->clear();
    QModelIndex index = m_ui->keysView->indexAt(pos);
    if (index.isValid()) {
        QVariant dirtyV = index.data(Models::Keys::Dirty);
        if (dirtyV.isValid() && dirtyV.toBool()) {
            QAction* rev = contextMenu->addAction(Shared::icon("clean"), tr("Revert changes"));
            connect(rev, &QAction::triggered, std::bind(&Models::Keys::revertKey, &keysModel, index.row()));
        }

        QVariant levelV = index.data(Models::Keys::TrustLevel);
        if (levelV.isValid()) {
            Shared::TrustLevel level = static_cast<Shared::TrustLevel>(levelV.toUInt());
            if (level == Shared::TrustLevel::undecided ||
                level == Shared::TrustLevel::automaticallyDistrusted ||
                level == Shared::TrustLevel::manuallyDistrusted
            ) {
                QAction* rev = contextMenu->addAction(Shared::icon("favorite"), tr("Trust"));
                connect(rev, &QAction::triggered,
                        std::bind(&Models::Keys::setTrustLevel, &keysModel,
                                  index.row(), Shared::TrustLevel::manuallyTrusted
                        )
                );
            }

            if (level == Shared::TrustLevel::undecided ||
                level == Shared::TrustLevel::automaticallyTrusted ||
                level == Shared::TrustLevel::manuallyTrusted ||
                level == Shared::TrustLevel::authenticated
            ) {
                QAction* rev = contextMenu->addAction(Shared::icon("unfavorite"), tr("Distrust"));
                connect(rev, &QAction::triggered,
                        std::bind(&Models::Keys::setTrustLevel, &keysModel,
                                  index.row(), Shared::TrustLevel::manuallyDistrusted
                        )
                );
            }
        }
    }

    contextMenu->popup(m_ui->keysView->viewport()->mapToGlobal(pos));
}