#include "gtl_hw_recorder.h"

#include <QJsonObject>
#include <QJsonArray>
#include <QJsonDocument>

#include "core/gtl_logger.h"

namespace gtl
{
    namespace hw
    {
        recorder::recorder(const std::vector<gtl::analog_data*> &ad, qreal time, QString comment, QString dir, QString file_name, QString extension, QObject *parent)
            : QObject{parent}
            , _samples(0)
            , _size(0)
            , _stream(nullptr)
            , _file(nullptr)
            , _device(nullptr)
        {

            QJsonArray channels;

            for(auto it : ad)
            {
                if(_device)
                {
                    if(_device != static_cast<gtl::device*>(it->root()))
                        continue;

                }
                else
                    _device = static_cast<gtl::device*>(it->root());

/*
                QJsonArray ad_objects;
                gtl::data_model_node* node = it;

                while(node->parent_node())
                {

                    QJsonObject node_object;
                    node->get_state(node_object);
                    ad_objects.append(node_object);

                    node = node->parent_node();
                }

                channels.append(ad_objects);
*/

                QJsonObject ad_object;
                get_state(ad_object, it);
                channels.append(ad_object);

                _ad.push_back(it);
            }


            if(_device == nullptr)
            {
                gtl::logger::warning("recorder", "nothing record");

                return;
            }

            QJsonObject device_object;
            device_object["name"] = _device->name();
            device_object["rate"] = _device->rate();
            device_object["channels"] = channels;




            QDir dir_(dir);
            dir_.mkpath(dir);
            QString name = file_name + "." + extension;
            int idx = 0;
            while(dir_.exists(name))
            {
                idx++;

                name = file_name + " (" + QString::number(idx) + ")." + extension;
            }

            QJsonDocument info;
            QJsonObject root;
            root["hw"] = device_object;
            root["comment"] = comment;
            info.setObject(root);


            _path = dir_.absoluteFilePath(name);
            _file = new QFile(_path);
            if(!_file->open(QFile::WriteOnly))
            {
                delete _file;
                _file = nullptr;

                gtl::logger::error("recorder", "error creatig file: " + _path);

                return;
            }

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

            _stream = new QDataStream(_file);
            _stream->setFloatingPointPrecision(QDataStream::SinglePrecision);
            _stream->setByteOrder(QDataStream::LittleEndian);


            _size = _device->rate()*time;
            if(_size == 0)
                _size -=1;

        }

        recorder::~recorder()
        {
            stop();

            delete _stream;

            if(_file)
                delete _file;
        }

        void recorder::start()
        {
            if(_device)
                connect(_device, &gtl::device::recieved_data, this, &recorder::device_recieved_data);

            emit progress(0);

        }

        void recorder::stop()
        {
            if(_device)
                disconnect(_device, &gtl::device::recieved_data, this, &recorder::device_recieved_data);
        }

        bool recorder::is_success() const
        {
            if(_device == nullptr)
                return false;

            if(_file == nullptr)
                return false;

            return true;
        }

        qreal recorder::time() const
        {
            return _samples/_device->rate();
        }

        QString recorder::path() const
        {
            return _path;
        }

        void recorder::get_state(QJsonObject &root, data_model_node *node)
        {
            if(node->parent_node())
            {
                node->get_state(root);

                QJsonObject parent_object;
                get_state(parent_object, node->parent_node());

                if(!parent_object.isEmpty())
                    root.insert("parent", parent_object);
            }
        }

        void recorder::write(qreal value)
        {
            *_stream << value;
        }

        void recorder::device_recieved_data()
        {
            if(_samples == _size)
                return;

            _device->lock_ai();

            for(int i = 0; i < (int)_ad.front()->size(); i++)
            {
                for(auto it : _ad)
                {
                    write(it->at(i));
                }

                _samples++;



                if(_samples == _size)
                    break;
            }

            _device->unlock_ai();

            emit progress((qreal)_samples/_size);

            if(_samples == _size)
            {

                finish_writing();
                _file->flush();
                emit finished();
            }

        }
    }
}