/**
 * Copyright (C) 2015 MongoDB Inc.
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, the copyright holders give permission to link the
 * code of portions of this program with the OpenSSL library under certain
 * conditions as described in each individual source file and distribute
 * linked combinations including the program with the OpenSSL library. You
 * must comply with the GNU Affero General Public License in all respects
 * for all of the code used other than as permitted herein. If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so. If you do not
 * wish to do so, delete this exception statement from your version. If you
 * delete this exception statement from all source files in the program,
 * then also delete it in the license file.
 */

#include "mongo/platform/basic.h"

#include "mongo/scripting/mozjs/idwrapper.h"

#include "mongo/base/error_codes.h"
#include "mongo/scripting/mozjs/exception.h"
#include "mongo/scripting/mozjs/jsstringwrapper.h"
#include "mongo/util/assert_util.h"

namespace mongo {
namespace mozjs {

IdWrapper::IdWrapper(JSContext* cx, JS::HandleId value) : _context(cx), _value(cx, value) {}

std::string IdWrapper::toString() const {
    JSStringWrapper jsstr;
    return toStringData(&jsstr).toString();
}

StringData IdWrapper::toStringData(JSStringWrapper* jsstr) const {
    if (JSID_IS_STRING(_value)) {
        *jsstr = JSStringWrapper(_context, JSID_TO_STRING(_value));
    } else if (JSID_IS_INT(_value)) {
        *jsstr = JSStringWrapper(JSID_TO_INT(_value));
    } else {
        throwCurrentJSException(_context,
                                ErrorCodes::TypeMismatch,
                                "Cannot toString() non-string and non-integer jsid");
    }

    return jsstr->toStringData();
}

uint32_t IdWrapper::toInt32() const {
    uassert(ErrorCodes::TypeMismatch, "Cannot toInt32() non-integer jsid", JSID_IS_INT(_value));

    return JSID_TO_INT(_value);
}

void IdWrapper::toValue(JS::MutableHandleValue value) const {
    if (isInt()) {
        value.setInt32(toInt32());
        return;
    }

    if (isString()) {
        auto str = JSID_TO_STRING(_value);
        value.setString(str);
        return;
    }

    uasserted(ErrorCodes::BadValue, "Failed to toValue() non-string and non-integer jsid");
}

bool IdWrapper::equals(StringData sd) const {
    return sd.compare(toString()) == 0;
}

bool IdWrapper::equalsAscii(StringData sd) const {
    if (isString()) {
        auto str = JSID_TO_STRING(_value);

        if (!str) {
            uasserted(ErrorCodes::JSInterpreterFailure, "Failed to JSID_TO_STRING");
        }

        bool matched;
        if (!JS_StringEqualsAscii(_context, str, sd.rawData(), &matched)) {
            uasserted(ErrorCodes::JSInterpreterFailure, "Failed to JS_StringEqualsAscii");
        }

        return matched;
    }

    if (isInt()) {
        JSStringWrapper jsstr(toInt32());
        return jsstr.toStringData().compare(sd) == 0;
    }

    uasserted(ErrorCodes::BadValue, "Cannot equalsAscii non-string non-integer jsid");
}

bool IdWrapper::isInt() const {
    return JSID_IS_INT(_value);
}

bool IdWrapper::isString() const {
    return JSID_IS_STRING(_value);
}

}  // namespace mozjs
}  // namespace mongo