#include "hw/gtl_hw_player_file.h"
#include "qjsonarray.h"

#include <QJsonDocument>

namespace gtl
{
    namespace hw
    {
        player_file::player_file(QObject *parent, QString path)
            : QObject(parent)
            , _path(path)
            , _stream(NULL)
            , _is_ok(false)
            , _time(0)
            , _channels(0)
        {
            _file = new QFile(path);

            if (_file->open(QIODevice::ReadOnly))
            {
                _stream = new QDataStream(_file);
                _stream->setByteOrder(QDataStream::LittleEndian);
                _stream->setFloatingPointPrecision(QDataStream::FloatingPointPrecision::SinglePrecision);
                _is_ok = true;
            }

            QFile info_file(path + ".info");
            if(info_file.open(QFile::ReadOnly))
            {
                QByteArray data = info_file.readAll();
                _data = QJsonDocument::fromJson(data).object();
                info_file.close();
            }
        }

        player_file::~player_file()
        {
            if (_stream)
                delete _stream;

            _file->close();

            delete _file;
        }

        QString player_file::channel(int idx) const
        {
            QString name = _data["hw"]["channels"].toArray().at(idx).toObject().value("name").toString();
            if(name.isEmpty())
                name = "input " + QString::number(idx);

            return name;
        }

        QString player_file::unit(int idx) const
        {
            return _data["hw"]["channels"].toArray().at(idx).toObject().value("unit").toString();
        }

        int player_file::color(int idx) const
        {
            return _data["hw"]["channels"].toArray().at(idx).toObject().value("color").toInt();
        }

        QJsonObject player_file::channel_info(int idx) const
        {
            return _data["hw"]["channels"].toArray().at(idx).toObject();
        }

        qreal player_file::reference(int idx) const
        {
            qreal reference = get_root(idx).value("reference").toDouble();
            if(reference == 0)
                reference = 1;

            return reference;
        }

        qreal player_file::sensitivity(int idx) const
        {
            qreal sensitivity = get_root(idx).value("sensitivity").toDouble();
            if(sensitivity == 0)
                sensitivity = 1;

            return sensitivity;
        }

        qreal player_file::gain(int idx) const
        {
            qreal gain = get_root(idx).value("gain").toDouble();
            if(gain == 0)
                gain = 1;

            return gain;
        }

        qreal player_file::offset(int idx) const
        {
            return get_root(idx).value("offset").toDouble();
        }

        QString player_file::device() const
        {
            return _data["hw"]["name"].toString();
        }

        QString player_file::comment() const
        {
            return _data["comment"].toString();
        }

        const QJsonObject &player_file::data() const
        {
            return _data;
        }

        void player_file::seek_to_start()
        {
            _file->seek(_pos_data);
        }

        void player_file::get_ranges_indices(std::back_insert_iterator<std::vector<std::pair<int, int>>> ranges) const
        {
            QJsonObject data_object;
            QFile info_file(_path + ".info");
            if(info_file.open(QFile::ReadOnly))
            {
                QByteArray data = info_file.readAll();
                data_object = QJsonDocument::fromJson(data).object();

                QJsonArray ranges_array = data_object["ranges"].toArray();
                if(ranges_array.empty())
                {
                    ranges = std::pair<int, int>(0, samples());
                    ranges++;
                }


                for(auto it = ranges_array.begin(); it != ranges_array.end(); it++, ranges++)
                    ranges = std::pair<int, int>(qRound(it->toObject()["left"].toDouble()*_rate), qRound(it->toObject()["right"].toDouble()*_rate));


                info_file.close();
            }
        }

        void player_file::set_ranges(std::vector<std::pair<qreal, qreal>>::iterator begin, std::vector<std::pair<qreal, qreal>>::iterator end)
        {
            std::sort(begin, end);

            QJsonArray ranges;
            for(auto it = begin; it!= end; it++)
            {
                QJsonObject range;
                range.insert("left", it->first);
                range.insert("right", it->second);

                ranges.append(range);
            }

            _data["ranges"] = ranges;

            QFile info_file(_path + ".info");
            if(info_file.open(QFile::WriteOnly))
            {
                info_file.write(QJsonDocument(_data).toJson());
                info_file.close();
            }

        }

        void player_file::get_ranges(std::back_insert_iterator<std::vector<std::pair<qreal, qreal>>> ranges) const
        {
            QJsonArray ranges_array = _data["ranges"].toArray();
            for(auto it = ranges_array.begin(); it != ranges_array.end(); it++, ranges++)
                ranges = std::pair<qreal, qreal>(it->toObject()["left"].toDouble(), it->toObject()["right"].toDouble());
        }

        QJsonObject player_file::get_root(int idx) const
        {
            QJsonObject root = _data["hw"]["channels"].toArray().at(idx).toObject();
            while(!root.isEmpty())
            {
                if(root.value("node").toString().contains("analog_input"))
                    break;

                root = root.value("parent").toObject();
            }

            return root;
        }
    }
}