#include <pybind11/pybind11.h>
#include <pybind11/stl.h>
#include <pybind11/numpy.h>
#include <pybind11/chrono.h>
#include <filesystem>
#include <stdexcept>

#include <opm/io/eclipse/EclFile.hpp>
#include <opm/io/eclipse/EclIOdata.hpp>
#include <opm/io/eclipse/ERst.hpp>
#include <opm/io/eclipse/ESmry.hpp>
#include <opm/io/eclipse/ExtESmry.hpp>
#include <opm/io/eclipse/EGrid.hpp>
#include <opm/io/eclipse/ERft.hpp>
#include <opm/io/eclipse/EclOutput.hpp>
#include <opm/common/utility/TimeService.hpp>

#include <opm/common/utility/numeric/calculateCellVol.hpp>

#include "export.hpp"
#include "converters.hpp"

#include <python/cxx/OpmCommonPythonDoc.hpp>

namespace py = pybind11;


namespace {

using npArray = std::tuple<py::array, Opm::EclIO::eclArrType>;
using EclEntry = std::tuple<std::string, Opm::EclIO::eclArrType, int64_t>;

class ESmryBind {

public:

    ESmryBind(const std::string& filename, bool loadBaseRunData)
    {
        std::filesystem::path m_inputFileName(filename);

        if (m_inputFileName.extension() == ".SMSPEC"){
            m_esmry = std::make_unique<Opm::EclIO::ESmry>(m_inputFileName, loadBaseRunData);
        } else if (m_inputFileName.extension()==".ESMRY") {
            m_ext_esmry = std::make_unique<Opm::EclIO::ExtESmry>(m_inputFileName, loadBaseRunData);
        } else
            throw std::invalid_argument("Input file should have extension .SMSPEC or .ESMRY");
    }

    bool hasKey(const std::string& key)
    {
        if (m_esmry != nullptr)
            return m_esmry->hasKey(key);
        else
            return m_ext_esmry->hasKey(key);
    }

    void make_esmry_file()
    {
        if (m_esmry == nullptr)
            throw std::invalid_argument("make_esmry_file only available for SMSPEC input files");

        m_esmry->make_esmry_file();
    }

    size_t numberOfTimeSteps()
    {
        if (m_esmry != nullptr)
            return m_esmry->numberOfTimeSteps();
        else
            return m_ext_esmry->numberOfTimeSteps();
    }

    py::array get_smry_vector(const std::string& key)
    {
        if (m_esmry != nullptr)
            return convert::numpy_array( m_esmry->get(key) );
        else
            return convert::numpy_array( m_ext_esmry->get(key) );
    }

    py::array get_smry_vector_at_rsteps(const std::string& key)
    {
        if (m_esmry != nullptr)
            return convert::numpy_array( m_esmry->get_at_rstep(key) );
        else
            return convert::numpy_array( m_ext_esmry->get_at_rstep(key) );
    }

    std::tuple<int, int, int,int, int, int, bool> smry_start_date()
    {
        time_point utc_chrono;

        if (m_esmry != nullptr)
            utc_chrono = m_esmry->startdate();
        else
            utc_chrono = m_ext_esmry->startdate();

        auto utc_time_t   = std::chrono::system_clock::to_time_t( utc_chrono );

        auto utc_ts       = Opm::TimeStampUTC( utc_time_t );

        auto local_time_t = Opm::asLocalTimeT( utc_ts );

        std::tm* local_tm = std::localtime(&local_time_t);

        int y = local_tm->tm_year + 1900;
        int m = local_tm->tm_mon + 1;
        int d = local_tm->tm_mday;
        int h = local_tm->tm_hour;
        int mi = local_tm->tm_min;
        int s = local_tm->tm_sec;

        bool dst = local_tm->tm_isdst == 1 ? true : false;

        return std::make_tuple(y, m, d, h, mi, s, dst);
    }


    std::vector<time_point> dates() const
    {
        std::vector<time_point> result;
        std::vector<time_point> times;
        if (m_esmry != nullptr) {
            times = m_esmry->dates();
        } else {
            times = m_ext_esmry->dates();
        }
        result.reserve(times.size());
        for (std::size_t i = 0; i < times.size(); ++i) {
            auto utc_time_t   = std::chrono::system_clock::to_time_t(times[i]);
            auto utc_ts       = Opm::TimeStampUTC(utc_time_t);
            auto local_time_t = Opm::asLocalTimeT(utc_ts);
            result.push_back(TimeService::from_time_t(local_time_t));
        }

        return result;
    }

    const std::vector<std::string>& keywordList() const
    {
        if (m_esmry != nullptr)
            return m_esmry->keywordList();
        else
            return m_ext_esmry->keywordList();
    }

    std::vector<std::string> keywordList(const std::string& pattern) const
    {
        if (m_esmry != nullptr)
            return m_esmry->keywordList(pattern);
        else
            return m_ext_esmry->keywordList(pattern);
    }

    std::string units(const std::string& field) const
    {
        if (m_esmry != nullptr) {
            return m_esmry->get_unit(field);
        }
        else {
            return m_ext_esmry->get_unit(field);
        }
    }

private:
    std::unique_ptr<Opm::EclIO::ESmry> m_esmry;
    std::unique_ptr<Opm::EclIO::ExtESmry> m_ext_esmry;
};



class EclOutputBind {

public:

    EclOutputBind(const std::string& filename, const bool formatted, const bool append)
    {
        if (append == true)
            m_output = std::make_unique<Opm::EclIO::EclOutput>(filename, formatted, std::ios::app);
        else
            m_output = std::make_unique<Opm::EclIO::EclOutput>(filename, formatted, std::ios::out);
    }

    template<class T>
    void writeArray(const std::string& name, const std::vector<T>& data){
        m_output->write<T>(name, data);
        m_output->flushStream();
    }

    void writeC0nnArray(const std::string& name, const std::vector<std::string>& data, int element_size){
        m_output->write(name, data, element_size);
        m_output->flushStream();
    }

    void writeMessage(const std::string& name)
    {
        m_output->message(name);
        m_output->flushStream();
    }

private:
    std::unique_ptr<Opm::EclIO::EclOutput> m_output;
};


npArray get_vector_index(Opm::EclIO::EclFile * file_ptr, std::size_t array_index)
{
    auto array_type = std::get<1>(file_ptr->getList()[array_index]);

    if (array_type == Opm::EclIO::INTE)
        return std::make_tuple (convert::numpy_array( file_ptr->get<int>(array_index)), array_type);

    if (array_type == Opm::EclIO::REAL)
        return std::make_tuple (convert::numpy_array( file_ptr->get<float>(array_index)), array_type);

    if (array_type == Opm::EclIO::DOUB)
        return std::make_tuple (convert::numpy_array( file_ptr->get<double>(array_index)), array_type);

    if (array_type == Opm::EclIO::LOGI)
        return std::make_tuple (convert::numpy_array( file_ptr->get<bool>(array_index)), array_type);

    if ((array_type == Opm::EclIO::CHAR) || (array_type == Opm::EclIO::C0NN))
        return std::make_tuple (convert::numpy_string_array( file_ptr->get<std::string>(array_index)), array_type);

    throw std::logic_error("Data type not supported");
}

size_t get_array_index(const std::vector<EclEntry>& array_list, const std::string& array_name, size_t occurence)
{
    size_t cidx = 0;

    auto it = std::find_if(array_list.begin(), array_list.end(),
                           [&cidx, &array_name, occurence](const EclEntry& entry)
                           {
                              if (std::get<0>(entry) == array_name)
                                  ++cidx;

                              return cidx == occurence + 1;
                           });

    return std::distance(array_list.begin(), it);
}

npArray get_vector_name(Opm::EclIO::EclFile * file_ptr, const std::string& array_name)
{
    if (file_ptr->hasKey(array_name) == false)
        throw std::logic_error("Array " + array_name + " not found in EclFile");

    auto array_list = file_ptr->getList();
    size_t array_index = get_array_index(array_list, array_name, 0);

    return get_vector_index(file_ptr, array_index);
}

npArray get_vector_occurrence(Opm::EclIO::EclFile * file_ptr, const std::string& array_name, size_t occurrence)
{
    if (occurrence >= file_ptr->count(array_name) )
        throw std::logic_error("Occurrence " + std::to_string(occurrence) + " not found in EclFile");

    auto array_list = file_ptr->getList();
    size_t array_index = get_array_index(array_list, array_name, occurrence);

    return get_vector_index(file_ptr, array_index);
}

bool erst_contains(Opm::EclIO::ERst * file_ptr, std::tuple<std::string, int> keyword)
{
    bool hasKeyAtReport = file_ptr->occurrence_count(std::get<0>(keyword), std::get<1>(keyword)) > 0 ? true : false;
    return hasKeyAtReport;
}

npArray get_erst_by_index(Opm::EclIO::ERst * file_ptr, size_t index, size_t rstep)
{
    auto arrList = file_ptr->listOfRstArrays(rstep);

    if (index >=arrList.size())
        throw std::out_of_range("Array index out of range. ");

    auto array_type = std::get<1>(arrList[index]);

    if (array_type == Opm::EclIO::INTE)
        return std::make_tuple (convert::numpy_array( file_ptr->getRestartData<int>(index, rstep)), array_type);

    if (array_type == Opm::EclIO::REAL)
        return std::make_tuple (convert::numpy_array( file_ptr->getRestartData<float>(index, rstep)), array_type);

    if (array_type == Opm::EclIO::DOUB)
        return std::make_tuple (convert::numpy_array( file_ptr->getRestartData<double>(index, rstep)), array_type);

    if (array_type == Opm::EclIO::LOGI)
        return std::make_tuple (convert::numpy_array( file_ptr->getRestartData<bool>(index, rstep)), array_type);

    if (array_type == Opm::EclIO::CHAR)
        return std::make_tuple (convert::numpy_string_array( file_ptr->getRestartData<std::string>(index, rstep)), array_type);

    throw std::logic_error("Data type not supported");
}


npArray get_erst_vector(Opm::EclIO::ERst * file_ptr, const std::string& key, size_t rstep, size_t occurrence)
{
    if (occurrence >= static_cast<size_t>(file_ptr->occurrence_count(key, rstep)))
        throw std::out_of_range("file have less than " + std::to_string(occurrence + 1) + " arrays in selected report step");

    auto array_list = file_ptr->listOfRstArrays(rstep);

    size_t array_index = get_array_index(array_list, key, occurrence);

    return get_erst_by_index(file_ptr, array_index, rstep);
}

std::tuple<std::array<double,8>, std::array<double,8>, std::array<double,8>>
get_xyz_from_ijk(Opm::EclIO::EGrid * file_ptr, int i, int j, int k)
{
    std::array<double,8> X = {0.0};
    std::array<double,8> Y = {0.0};
    std::array<double,8> Z = {0.0};

    std::array<int, 3> ijk = {i, j, k};

    file_ptr->getCellCorners(ijk, X, Y, Z);

    return std::make_tuple(X, Y, Z);
}

std::tuple<std::array<double,8>, std::array<double,8>, std::array<double,8>>
get_xyz_from_ijk_mapaxes(Opm::EclIO::EGrid * file_ptr, int i, int j, int k, bool mapaxes)
{
    auto xyz = get_xyz_from_ijk(file_ptr, i, j, k);

    if (file_ptr->with_mapaxes() && mapaxes){
        for (int n = 0; n < 8; n++)
            file_ptr->mapaxes_transform(std::get<0>(xyz)[n], std::get<1>(xyz)[n]);
    }

    return xyz;
}

std::tuple<std::array<double,8>, std::array<double,8>, std::array<double,8>>
get_xyz_from_active_index(Opm::EclIO::EGrid * file_ptr, int actIndex)
{
    std::array<int, 3> ijk = file_ptr->ijk_from_active_index(actIndex);
    return get_xyz_from_ijk(file_ptr, ijk[0], ijk[1], ijk[2]);
}

std::tuple<std::array<double,8>, std::array<double,8>, std::array<double,8>>
get_xyz_from_active_index_mapaxes(Opm::EclIO::EGrid * file_ptr, int actIndex, bool mapaxes)
{
    auto xyz = get_xyz_from_active_index(file_ptr, actIndex);

    if (file_ptr->with_mapaxes() && mapaxes){
        for (int n = 0; n < 8; n++)
            file_ptr->mapaxes_transform(std::get<0>(xyz)[n], std::get<1>(xyz)[n]);
    }

    return xyz;
}

py::array get_cellvolumes_mask(Opm::EclIO::EGrid * file_ptr, std::vector<int> mask)
{
    size_t totCells = static_cast<size_t>(file_ptr->totalNumberOfCells());
    std::vector<double> celvol(totCells, 0.0);

    if (totCells != mask.size())
        throw std::logic_error("size of input mask doesn't match size of grid");

    std::array<double,8> X = {0.0};
    std::array<double,8> Y = {0.0};
    std::array<double,8> Z = {0.0};

    for (size_t globInd = 0; globInd < totCells; globInd++){
        if (mask[globInd] > 0){
            file_ptr->getCellCorners(globInd, X, Y, Z);
            celvol[globInd] = calculateCellVol(X, Y, Z);
        }
    }

    return convert::numpy_array( celvol );
}

py::array get_cellvolumes(Opm::EclIO::EGrid * file_ptr)
{
    int totCells = file_ptr->totalNumberOfCells();
    std::vector<int> mask(totCells, 1);

    return get_cellvolumes_mask(file_ptr, mask);
}

npArray get_rft_vector_WellDate(Opm::EclIO::ERft * file_ptr,const std::string& name,
                                  const std::string& well, int y, int m, int d)
{
    auto arrList = file_ptr->listOfRftArrays(well, y, m, d);
    size_t array_index = get_array_index(arrList, name, 0);
    Opm::EclIO::eclArrType array_type = std::get<1>(arrList[array_index]);

    if (array_type == Opm::EclIO::INTE)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<int>(name, well, y, m, d) ), array_type);

    if (array_type == Opm::EclIO::REAL)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<float>(name, well, y, m, d) ), array_type);

    if (array_type == Opm::EclIO::DOUB)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<double>(name, well, y, m, d) ), array_type);

    if (array_type == Opm::EclIO::CHAR)
        return std::make_tuple (convert::numpy_string_array( file_ptr->getRft<std::string>(name, well, y, m, d) ), array_type);

    if (array_type == Opm::EclIO::LOGI)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<bool>(name, well, y, m, d) ), array_type);

    throw std::logic_error("Data type not supported");
}

npArray get_rft_vector_Index(Opm::EclIO::ERft * file_ptr,const std::string& name, int reportIndex)
{
    auto arrList = file_ptr->listOfRftArrays(reportIndex);
    size_t array_index = get_array_index(arrList, name, 0);
    Opm::EclIO::eclArrType array_type = std::get<1>(arrList[array_index]);

    if (array_type == Opm::EclIO::INTE)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<int>(name, reportIndex) ), array_type);

    if (array_type == Opm::EclIO::REAL)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<float>(name, reportIndex) ), array_type);

    if (array_type == Opm::EclIO::DOUB)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<double>(name, reportIndex) ), array_type);

    if (array_type == Opm::EclIO::CHAR)
        return std::make_tuple (convert::numpy_string_array( file_ptr->getRft<std::string>(name, reportIndex) ), array_type);

    if (array_type == Opm::EclIO::LOGI)
        return std::make_tuple (convert::numpy_array( file_ptr->getRft<bool>(name, reportIndex) ), array_type);

    throw std::logic_error("Data type not supported");
}



/*
  This insane time based trickery is to address the following situation:

  1. OPM uses UTC times internally - so the ESmry::startdate() method will
     return a timepoint which should be interpreted in UTC.

  2. The pybind11 std::chrono <-> datetime mapping uses localtime. We therefor
     convert the timepoint returned from UTC to localtime before proceeding to
     the pybind11 conversion.
*/


}


void python::common::export_IO(py::module& m) {

    using namespace Opm::Common::DocStrings;

    py::enum_<Opm::EclIO::eclArrType>(m, "eclArrType", py::arithmetic(), eclArrType_docstring)
        .value("INTE", Opm::EclIO::INTE, eclArrType_INTE_docstring)
        .value("REAL", Opm::EclIO::REAL, eclArrType_REAL_docstring)
        .value("DOUB", Opm::EclIO::DOUB, eclArrType_DOUB_docstring)
        .value("CHAR", Opm::EclIO::CHAR, eclArrType_CHAR_docstring)
        .value("C0nn", Opm::EclIO::C0NN, eclArrType_C0nn_docstring)
        .value("LOGI", Opm::EclIO::LOGI, eclArrType_LOGI_docstring)
        .value("MESS", Opm::EclIO::MESS, eclArrType_MESS_docstring)
        .export_values();

    py::class_<Opm::EclIO::EclFile>(m, "EclFile", EclFile_docstring)
        .def(py::init<const std::string &, bool>(), py::arg("filename"), py::arg("preload") = false, EclFile_init_docstring)
        .def_property_readonly("arrays", &Opm::EclIO::EclFile::getList, EclFile_arrays_docstring)
        .def("__contains__", &Opm::EclIO::EclFile::hasKey, py::arg("name"), EclFile_contains_docstring)
        .def("__len__", &Opm::EclIO::EclFile::size, EclFile_len_docstring)
        .def("count", &Opm::EclIO::EclFile::count, py::arg("name"), EclFile_count_docstring)
        .def("__get_data", &get_vector_index, py::arg("index"), EclFile_get_data_index_docstring)
        .def("__get_data", &get_vector_name, py::arg("name"), EclFile_get_data_name_docstring)
        .def("__get_data", &get_vector_occurrence, py::arg("name"), py::arg("occurrence"), EclFile_get_data_occurrence_docstring);

    py::class_<Opm::EclIO::ERst>(m, "ERst", ERst_docstring)
        .def(py::init<const std::string &>(), py::arg("filename"), ERst_init_docstring)
        .def("__has_report_step", &Opm::EclIO::ERst::hasReportStepNumber, py::arg("report_step"), ERst_has_report_step_docstring)
        .def("load_report_step", &Opm::EclIO::ERst::loadReportStepNumber, py::arg("report_step"), ERst_load_report_step_docstring)
        .def_property_readonly("report_steps", &Opm::EclIO::ERst::listOfReportStepNumbers, ERst_report_steps_docstring)
        .def("__len__", &Opm::EclIO::ERst::numberOfReportSteps, ERst_len_docstring)
        .def("count", &Opm::EclIO::ERst::occurrence_count, py::arg("name"), py::arg("report_step"), ERst_count_docstring)
        .def("__contains", &erst_contains, py::arg("tuple"), ERst_contains_docstring)
        .def("arrays", (std::vector< std::tuple<std::string, Opm::EclIO::eclArrType, int64_t> >
                        (Opm::EclIO::ERst::*)(int) ) &Opm::EclIO::ERst::listOfRstArrays, py::arg("report_step"), ERst_arrays_docstring)
        .def("arrays", (std::vector< std::tuple<std::string, Opm::EclIO::eclArrType, int64_t> >
                        (Opm::EclIO::ERst::*)(int, const std::string&) ) &Opm::EclIO::ERst::listOfRstArrays, py::arg("report_step"), py::arg("lgr_name"), ERst_arrays_with_string_docstring)
        .def("__get_data", &get_erst_by_index, py::arg("index"), py::arg("report_step"), ERst_get_data_by_index_docstring)
        .def("__get_data", &get_erst_vector, py::arg("name"), py::arg("report_step"), py::arg("occurrence"), ERst_get_data_vector_docstring);


   py::class_<ESmryBind>(m, "ESmry", ESmry_docstring)
        .def(py::init<const std::string &, const bool>(), py::arg("filename"), py::arg("load_base_run") = false, ESmry_init_docstring)
        .def("__contains__", &ESmryBind::hasKey, py::arg("key"), ESmry_contains_docstring)
        .def("make_esmry_file", &ESmryBind::make_esmry_file, ESmry_make_esmry_file_docstring)
        .def("__len__", &ESmryBind::numberOfTimeSteps, ESmry_len_docstring)
        .def("__get_all", &ESmryBind::get_smry_vector, py::arg("key"), ESmry_get_all_docstring)
        .def("__get_at_rstep", &ESmryBind::get_smry_vector_at_rsteps, py::arg("key"), ESmry_get_at_rstep_docstring)
        .def("__start_date", &ESmryBind::smry_start_date, ESmry_start_date_docstring)
        .def("keys", (const std::vector<std::string>& (ESmryBind::*) (void) const)
            &ESmryBind::keywordList, ESmry_keys1_docstring)
        .def("keys", (std::vector<std::string> (ESmryBind::*) (const std::string&) const)
            &ESmryBind::keywordList, py::arg("pattern"), ESmry_keys2_docstring)
        .def("dates", &ESmryBind::dates, ESmry_dates_docstring)
        .def("units", &ESmryBind::units, py::arg("field"), ESmry_units_docstring);

   py::class_<Opm::EclIO::EGrid>(m, "EGrid", EGrid_docstring)
        .def(py::init<const std::string &, const std::string &>(), py::arg("filename"), py::arg("grid_name") = "global", EGrid_init_docstring)
        .def_property_readonly("active_cells", &Opm::EclIO::EGrid::activeCells, EGrid_active_cells_docstring)
        .def_property_readonly("dimension", &Opm::EclIO::EGrid::dimension, EGrid_dimension_docstring)
        .def("ijk_from_global_index", &Opm::EclIO::EGrid::ijk_from_global_index, py::arg("global_index"), EGrid_ijk_from_global_index_docstring)
        .def("ijk_from_active_index", &Opm::EclIO::EGrid::ijk_from_active_index, py::arg("active_index"), EGrid_ijk_from_active_index_docstring)
        .def("active_index", &Opm::EclIO::EGrid::active_index, py::arg("i"), py::arg("j"), py::arg("k"), EGrid_active_index_docstring)
        .def("global_index", &Opm::EclIO::EGrid::global_index, py::arg("i"), py::arg("j"), py::arg("k"), EGrid_global_index_docstring)
        .def("export_mapaxes", &Opm::EclIO::EGrid::get_mapaxes, EGrid_export_mapaxes_docstring)
        .def("xyz_from_ijk", &get_xyz_from_ijk, py::arg("i"), py::arg("j"), py::arg("k"), EGrid_xyz_from_ijk_docstring)
        .def("xyz_from_ijk", &get_xyz_from_ijk_mapaxes, py::arg("i"), py::arg("j"), py::arg("k"), py::arg("apply_mapaxes"), EGrid_xyz_from_ijk_mapaxes_docstring)
        .def("xyz_from_active_index", &get_xyz_from_active_index, py::arg("active_index"), EGrid_xyz_from_active_index_docstring)
        .def("xyz_from_active_index", &get_xyz_from_active_index_mapaxes, py::arg("active_index"), py::arg("apply_mapaxes"), EGrid_xyz_from_active_index_mapaxes_docstring)
        .def("cellvolumes", &get_cellvolumes, EGrid_cellvolumes_docstring)
        .def("cellvolumes", &get_cellvolumes_mask, py::arg("mask"), EGrid_cellvolumes_mask_docstring);


 py::class_<Opm::EclIO::ERft>(m, "ERft", ERft_docstring)
        .def(py::init<const std::string &>(), py::arg("filename"), ERft_init_docstring)
        .def_property_readonly("list_of_rfts", &Opm::EclIO::ERft::listOfRftReports, ERft_list_of_rfts_docstring)

        .def("__get_list_of_arrays", (std::vector< std::tuple<std::string, Opm::EclIO::eclArrType, int64_t> >
                                      (Opm::EclIO::ERft::*)(int) const) &Opm::EclIO::ERft::listOfRftArrays, py::arg("report_index"), ERft_get_list_of_arrays1_docstring)

        .def("__get_list_of_arrays", (std::vector< std::tuple<std::string, Opm::EclIO::eclArrType, int64_t> >
                                      (Opm::EclIO::ERft::*)(const std::string&, int, int, int) const)
             &Opm::EclIO::ERft::listOfRftArrays, py::arg("well_name"), py::arg("year"), py::arg("month"), py::arg("day"), ERft_get_list_of_arrays2_docstring)

        .def("__get_data", &get_rft_vector_WellDate, py::arg("array_name"), py::arg("well_name"), py::arg("year"), py::arg("month"), py::arg("day"), ERft_get_data1_docstring)
        .def("__get_data", &get_rft_vector_Index, py::arg("array_name"), py::arg("report_index"), ERft_get_data2_docstring)

        .def("__has_rft", (bool (Opm::EclIO::ERft::*)(const std::string&, int, int, int) const) &Opm::EclIO::ERft::hasRft,
             py::arg("well_name"), py::arg("year"), py::arg("month"), py::arg("day"), ERft_has_rft_docstring)
        .def("__has_array", (bool (Opm::EclIO::ERft::*)(const std::string&, int) const) &Opm::EclIO::ERft::hasArray,
             py::arg("array_name"), py::arg("report_index"), ERft_has_array1_docstring)
        .def("__has_array", (bool (Opm::EclIO::ERft::*)(const std::string&, const std::string&, const
                             std::tuple<int,int,int>&) const) &Opm::EclIO::ERft::hasArray,
             py::arg("array_name"), py::arg("well_name"), py::arg("date"), ERft_has_array2_docstring)

       .def("__len__", &Opm::EclIO::ERft::numberOfReports, ERft_len_docstring);

   py::class_<EclOutputBind>(m, "EclOutput", EclOutput_docstring)
        .def(py::init<const std::string &, const bool, const bool>(), py::arg("filename"),
             py::arg("formatted") = false, py::arg("append") = false, EclOutput_init_docstring)
        .def("write_message", &EclOutputBind::writeMessage, py::arg("msg"), EclOutput_write_message_docstring)
        .def("__write_char_array", (void (EclOutputBind::*)(const std::string&,
                                  const std::vector<std::string>&)) &EclOutputBind::writeArray, py::arg("array_name"), py::arg("data"), EclOutput_write_char_array_docstring)

        .def("__write_c0nn_array", &EclOutputBind::writeC0nnArray, py::arg("array_name"), py::arg("data"), py::arg("element_size"), EclOutput_write_c0nn_array_docstring)

        .def("__write_logi_array", (void (EclOutputBind::*)(const std::string&,
                                  const std::vector<bool>&)) &EclOutputBind::writeArray, py::arg("array_name"), py::arg("data"), EclOutput_write_logi_array_docstring)
        .def("__write_inte_array", (void (EclOutputBind::*)(const std::string&,
                                  const std::vector<int>&)) &EclOutputBind::writeArray, py::arg("array_name"), py::arg("data"), EclOutput_write_inte_array_docstring)
        .def("__write_real_array", (void (EclOutputBind::*)(const std::string&,
                                  const std::vector<float>&)) &EclOutputBind::writeArray, py::arg("array_name"), py::arg("data"), EclOutput_write_real_array_docstring)
        .def("__write_doub_array", (void (EclOutputBind::*)(const std::string&,
                                  const std::vector<double>&)) &EclOutputBind::writeArray, py::arg("array_name"), py::arg("data"), EclOutput_write_doub_array_docstring);
}