/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "sqlconversationmodel.h"

#include <QDateTime>
#include <QDebug>
#include <QSqlError>
#include <QSqlRecord>
#include <QSqlQuery>
#include <QCoreApplication>
#include <QDir>

static const char *conversationsTableName = "Conversations";

static void createTable()
{
    if (QSqlDatabase::database().tables().contains(conversationsTableName)) {
        // The table already exists; we don't need to do anything.
        QSqlQuery query;
        query.exec("DELETE FROM Conversations WHERE date('now', '-30 day') >= date(timestamp)");
        //        query.exec("DELETE FROM Conversations");
        return;
    }

    QSqlQuery query;
    if (!query.exec(
            "CREATE TABLE IF NOT EXISTS 'Conversations' ("
            "'id' INTEGER  NOT NULL PRIMARY KEY AUTOINCREMENT,"
            "'author' TEXT NOT NULL,"
            "'recipient' TEXT NOT NULL,"
            "'timestamp' TEXT NOT NULL,"
            "'message' TEXT NOT NULL,"
            "'type' TEXT NOT NULL,"//1:message/2:file
            "'answer' TEXT NOT NULL,"//0|100%:success/1|errorcode
            "FOREIGN KEY('author') REFERENCES Contacts ( name ),"
            "FOREIGN KEY('recipient') REFERENCES Contacts ( name )"
            ")")) {
        qFatal("Failed to query database: %s", qPrintable(query.lastError().text()));
    }
}

SqlConversationModel::SqlConversationModel(QObject *parent) :
    QSqlTableModel(parent),m_isGroup(false)
{
    createTable();
    setTable(conversationsTableName);
    setSort(3, Qt::DescendingOrder);
    // Ensures that the model is sorted correctly after submitting a new row.
    setEditStrategy(QSqlTableModel::OnManualSubmit);
}

QString SqlConversationModel::recipient() const
{
    return m_recipient;
}

void SqlConversationModel::setRecipient(const QString &recipient)
{
    if (recipient == m_recipient)
        return;

    m_recipient = recipient;

    QString filterString;
    if(recipient == "GROUP"){
        filterString = QString::fromLatin1("(recipient = '%1')").arg(m_recipient);
    }
    else{
        filterString = QString::fromLatin1(
                           "(recipient = '%1' AND author = '%2') OR (recipient = '%3' AND author='%4')").arg(m_recipient).arg(m_meMail).arg(m_meMail).arg(m_recipient);
    }

//    qDebug()<<filterString;
    setFilter(filterString);
    select();

    emit recipientChanged();
}

QString SqlConversationModel::me() const
{
    return m_meMail;
}

void SqlConversationModel::setMe(const QString &mail)
{
    if (mail == m_meMail)
        return;
    m_meMail = mail;
    emit meChanged();
}

bool SqlConversationModel::isGroup() const
{
    return m_isGroup;
}

void SqlConversationModel::setIsGroup(const bool &group)
{
    if(m_isGroup == group)
        return;

    m_isGroup = group;
    emit isGroupChanged();
}

QVariant SqlConversationModel::data(const QModelIndex &index, int role) const
{
    if (role < Qt::UserRole)
        return QSqlTableModel::data(index, role);

    const QSqlRecord sqlRecord = record(index.row());
    return sqlRecord.value(role - Qt::UserRole);
}

QHash<int, QByteArray> SqlConversationModel::roleNames() const
{
    QHash<int, QByteArray> names;
    names[Qt::UserRole] = "id";
    names[Qt::UserRole + 1] = "author";
    names[Qt::UserRole + 2] = "recipient";
    names[Qt::UserRole + 3] = "timestamp";
    names[Qt::UserRole + 4] = "message";
    names[Qt::UserRole + 5] = "type";
    names[Qt::UserRole + 6] = "answer";
    return names;
}

void SqlConversationModel::initCurrentUser(const QJsonObject &value)
{
    setMe(value["user_mail"].toString());
    setIsGroup(true);
    setRecipient("GROUP");
}

void SqlConversationModel::getNewMessage(QString from)
{
    if(m_recipient==from){
        submitAll();
    }
    else{
        qDebug()<<"skip submitAll:"<<from<<m_recipient;
    }
}