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

#include "complex.hh"

namespace php_arma
{
    template <typename T>
    PHP_METHOD(Complex, __construct)
    {
        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;

        zval zero_val;
        zval_set_scalar(&zero_val, static_cast<T>(0));

        zval *current = getThis();
        
        if (EXPECTED(has_real)) {
            if (UNEXPECTED(!zval_check_scalar<T>(real))) {
                return;
            };
            object_set_property(Z_OBJ_P(current), 0, real);
            if (EXPECTED(has_imag)) {
                if (UNEXPECTED(!zval_check_scalar<T>(imag))) {
                    return;
                };
                object_set_property(Z_OBJ_P(current), 1, imag);
            } else {
                object_set_property(Z_OBJ_P(current), 1, &zero_val);
            }
        } else {
            object_set_property(Z_OBJ_P(current), 0, &zero_val);
            object_set_property(Z_OBJ_P(current), 1, &zero_val);
        }

        Z_OBJ_P(current)->handlers = PHP_ARMA_HANDLERS(complex, T);
    }

    PHP_ARMA_START_ME_1(complex, T)
        PHP_ARMA_ME(Complex, __construct, ZEND_ACC_PUBLIC | ZEND_ACC_CTOR, T)
    PHP_ARMA_END_ME_1(complex, T)

    template <typename T>
    void complex_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));
    }

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

        PHP_ARMA_CE(complex, double) = class_register("CxDouble", PHP_ARMA_METHODS(complex, double), complex_ce);
        property_declare(PHP_ARMA_CE(complex, double), "real");
        property_declare(PHP_ARMA_CE(complex, double), "imag");
        object_handlers_init(PHP_ARMA_HANDLERS(complex, double));
        PHP_ARMA_HANDLER_SET(complex, write_property, complex_write_property, double);
    }
    
    zend_class_entry *complex_ce;

    template <typename T>
    PHP_ARMA_DEFINE_CE(complex, T);
    template <typename T>
    PHP_ARMA_DEFINE_OBJECT_HANDLER(complex, T);
}