#include <qpdf/QPDFValue.hh>

#include <qpdf/QPDFObject_private.hh>

std::shared_ptr<QPDFObject>

QPDFValue::do_create(QPDFValue* object)

{

    std::shared_ptr<QPDFObject> obj(new QPDFObject());

    obj->value = std::shared_ptr<QPDFValue>(object);

    return obj;

}

std::string

QPDFValue::getDescription()

{

    if (object_description) {

        switch (object_description->index()) {

        case 0:

            {

                // Simple template string

                auto description = std::get<0>(*object_description);

                if (auto pos = description.find("$OG"); pos != std::string::npos) {

                    description.replace(pos, 3, og.unparse(' '));

                }

                if (auto pos = description.find("$PO"); pos != std::string::npos) {

                    qpdf_offset_t shift = (type_code == ::ot_dictionary) ? 2

                        : (type_code == ::ot_array)                      ? 1

                                                                         : 0;

                    description.replace(pos, 3, std::to_string(parsed_offset + shift));

                }

                return description;

            }

        case 1:

            {

                // QPDF::JSONReactor generated description

                auto j_descr = std::get<1>(*object_description);

                return (

                    *j_descr.input + (j_descr.object.empty() ? "" : ", " + j_descr.object) +

                    " at offset " + std::to_string(parsed_offset));

            }

        case 2:

            {

                // Child object description

                auto j_descr = std::get<2>(*object_description);

                std::string result;

                if (auto p = j_descr.parent.lock()) {

                    result = p->getDescription();

                }

                result += j_descr.static_descr;

                if (auto pos = result.find("$VD"); pos != std::string::npos) {

                    result.replace(pos, 3, j_descr.var_descr);

                }

                return result;

            }

        }

    } else if (og.isIndirect()) {

        return "object " + og.unparse(' ');

    }

    return {};

}