#include <exception>
#include <string>

#include "phonenumbers/phonenumberutil.h"

extern "C" {
	#include "postgres.h"
}

using namespace i18n::phonenumbers;

static const char* parseErrorMessage(PhoneNumberUtil::ErrorType error) {
	using PNU = i18n::phonenumbers::PhoneNumberUtil;
	switch(error) {
	case PNU::NO_PARSING_ERROR:
		return "Parsed successfully";
	case PNU::NOT_A_NUMBER:
		return "String does not appear to contain a phone number.";
	case PNU::INVALID_COUNTRY_CODE_ERROR:
		return "Invalid country code";
	//TODO: handle more error cases specifically.
	default:
		//We have some generic parsing error.
		return "Unable to parse number";
	}
}

/*
 * Utility functions for error handling
 */

void reportOutOfMemory() {
	ereport(ERROR,
		(errcode(ERRCODE_OUT_OF_MEMORY)));
}

void reportParseError(const char* phone_number, PhoneNumberUtil::ErrorType err) {
	ereport(ERROR,
			(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
			 errmsg("unable to parse '%s' as a phone number", phone_number),
			 errdetail("%s", parseErrorMessage(err))));
}

void reportGenericError(const std::exception& exception) {
	ereport(ERROR,
			(errcode(ERRCODE_EXTERNAL_ROUTINE_INVOCATION_EXCEPTION),
			 errmsg("C++ exception: %s", typeid(exception).name()),
			 errdetail("%s", exception.what())));
}

void logInfo(const char* msg) {
	ereport(INFO,
			(errcode(ERRCODE_SUCCESSFUL_COMPLETION),
			errmsg("%s", msg)));
}