//
// php-armadillo/complex.cc
//
// @Author CismonX
//

#include "complex.hh"

namespace php_arma
{
    template <typename T>
    zend_always_inline
    void property_declare(zend_class_entry *ce, const char *name)
    {
        zval property;
        zval_set_scalar(&property, static_cast<T>(0));
        zend_declare_property(ce, name, strlen(name), &property, ZEND_ACC_PUBLIC);
    }

    template <typename T>
    PHP_ARMA_METHOD(complex, __construct, T)
    {
        zval *real, *imag;
        ZEND_PARSE_PARAMETERS_START(0, 2)
            Z_PARAM_OPTIONAL
            Z_PARAM_ZVAL(real)
            Z_PARAM_ZVAL(imag)
        ZEND_PARSE_PARAMETERS_END();

        auto num_args = EX_NUM_ARGS();
        auto has_imag = num_args == 2;
        auto has_real = num_args > 0;

        auto current = Z_OBJ_P(getThis());
        
        if (EXPECTED(has_real)) {
            if (!zval_check_scalar<T>(real)) {
                return;
            }
            object_set_property(current, 0, real);
            if (EXPECTED(has_imag)) {
                if (!zval_check_scalar<T>(imag)) {
                    return;
                }
                object_set_property(current, 1, imag);
            }
        }

        current->handlers = &handlers;
    }

    template <typename T>
    void complex<T>::write_property(zval *obj, zval *member, zval *value, void **unused)
    {
        // Theoretically we won't get non-string values here, add type check just in case.
        if (UNEXPECTED(Z_TYPE_P(member) != IS_STRING)) {
            zend_throw_exception(zend_ce_error, "Unexpected error. Please contact developer.", -2);
            return;
        }

        if (UNEXPECTED(!zval_check_scalar<T>(value))) {
            return;
        }
        if (strcmp(Z_STRVAL_P(member), "real") == 0) {
            object_set_property(Z_OBJ_P(obj), 0, value);
            return;
        }
        if (strcmp(Z_STRVAL_P(member), "imag") == 0) {
            object_set_property(Z_OBJ_P(obj), 1, value);
            return;
        }

        zend_throw_exception_ex(zend_ce_exception, -2,
            "Bad property name for %s, expected 'real' or 'imag', '%s' given.", Z_OBJNAME_P(obj), Z_STRVAL_P(member));
    }

    template <typename T>
    zend_always_inline
    void complex<T>::ce_init(const char *name, zend_class_entry *parent_ce)
    {
        ce = class_register(name, parent_ce, me);
        property_declare<T>(ce, "real");
        property_declare<T>(ce, "imag");
        object_handlers_init(&handlers);
        handlers.write_property = write_property;
    }

    void complex_init()
    {
        complex_ce = abstract_class_register("Complex");

        complex<double>::ce_init("CxDouble", complex_ce);
    }
}