#include <boost/python/suite/indexing/vector_indexing_suite.hpp>

#include <opm/parser/eclipse/Deck/DeckItem.hpp>
#include <opm/parser/eclipse/Deck/DeckKeyword.hpp>
#include <opm/parser/eclipse/Deck/DeckRecord.hpp>
#include <opm/parser/eclipse/Utility/Typetools.hpp>

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


namespace {

/* DeckKeyword */
const DeckRecord& (DeckKeyword::*getRecord)(size_t index) const = &DeckKeyword::getRecord;



py::list item_to_pylist( const DeckItem& item )
{
    switch (item.getType())
    {
    case type_tag::integer:
        return iterable_to_pylist( item.getData< int >() );
        break;
    case type_tag::fdouble:
        return iterable_to_pylist( item.getData< double >() );
        break;
    case type_tag::string:
        return iterable_to_pylist( item.getData< std::string >() );
        break;
    default:
        throw std::logic_error( "Type not set." );
        break;
    }
}

struct DeckRecordIterator
{
    DeckRecordIterator(const DeckRecord* record) {
        this->record = record;
        this->it = this->record->begin();
    }

    const DeckRecord* record;
    DeckRecord::const_iterator it;

    py::list next() {
        if (it == record->end()) {
            PyErr_SetString(PyExc_StopIteration, "At end.");
            throw py::error_already_set();
        }
        return item_to_pylist(*(it++));
    }
};

}

void python::common::export_DeckKeyword(py::module& module) {
    py::class_< DeckKeyword >( module, "DeckKeyword")
        .def( "__repr__", &DeckKeyword::name )
        .def( "__str__", &str<DeckKeyword> )
        .def("__iter__",  [] (const DeckKeyword &keyword) { return py::make_iterator(keyword.begin(), keyword.end()); }, py::keep_alive<0,1>())
        .def( "__getitem__", getRecord, ref_internal)
        .def( "__len__", &DeckKeyword::size )
        .def_property_readonly("name", &DeckKeyword::name )
        ;


    py::class_< DeckRecord >( module, "DeckRecord")
        .def( "__repr__", &str<DeckRecord> )
        .def( "__iter__", +[](const DeckRecord& record){
            return DeckRecordIterator(&record);
        })
        .def( "__getitem__", +[](const DeckRecord& record, size_t index){
            return item_to_pylist( record.getItem(index) );
        })
        .def( "__getitem__", +[](const DeckRecord& record, const std::string& name){
            return item_to_pylist( record.getItem(name) );
        })
        .def( "__len__", &DeckRecord::size )
        ;


    py::class_< DeckRecordIterator >( module, "DeckRecordIterator")
        .def( "__next__", &DeckRecordIterator::next )
        .def( "next", &DeckRecordIterator::next )
        ;

}