/**
 * 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.
 */

#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kQuery

#include "mongo/platform/basic.h"

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

#include "mongo/scripting/mozjs/implscope.h"
#include "mongo/util/log.h"

namespace mongo {
namespace mozjs {

const JSFunctionSpec CursorHandleInfo::methods[2] = {
    MONGO_ATTACH_JS_FUNCTION(zeroCursorId), JS_FS_END,
};

const char* const CursorHandleInfo::className = "CursorHandle";

namespace {

long long* getCursorId(JSObject* thisv) {
    CursorHandleInfo::CursorTracker* tracker =
        static_cast<CursorHandleInfo::CursorTracker*>(JS_GetPrivate(thisv));
    if (tracker) {
        return &tracker->cursorId;
    }

    return nullptr;
}

long long* getCursorId(JS::CallArgs& args) {
    return getCursorId(args.thisv().toObjectOrNull());
}

}  // namespace

void CursorHandleInfo::finalize(JSFreeOp* fop, JSObject* obj) {
    auto cursorTracker = static_cast<CursorHandleInfo::CursorTracker*>(JS_GetPrivate(obj));
    if (cursorTracker) {
        const long long cursorId = cursorTracker->cursorId;
        if (cursorId) {
            try {
                cursorTracker->client->killCursor(cursorId);
            } catch (...) {
                auto status = exceptionToStatus();

                try {
                    LOG(0) << "Failed to kill cursor " << cursorId << " due to " << status;
                } catch (...) {
                    // This is here in case logging fails.
                }
            }
        }

        delete cursorTracker;
    }
}

void CursorHandleInfo::Functions::zeroCursorId(JSContext* cx, JS::CallArgs args) {
    long long* cursorId = getCursorId(args);
    if (cursorId) {
        *cursorId = 0;
    }
}

}  // namespace mozjs
}  // namespace mongo