/* Copyright 2013 10gen 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.
 */

#pragma once

namespace mongo {
namespace mutablebson {

    inline Element Element::operator[](size_t n) const {
        return findNthChild(n);
    }

    inline Element Element::operator[](const StringData& name) const {
        return findFirstChildNamed(name);
    }

    inline double Element::getValueDouble() const {
        dassert(hasValue() && isType(mongo::NumberDouble));
        return getValue()._numberDouble();
    }

    inline StringData Element::getValueString() const {
        dassert(hasValue() && isType(mongo::String));
        return getValueStringOrSymbol();
    }

    inline BSONObj Element::getValueObject() const {
        dassert(hasValue() && isType(mongo::Object));
        return getValue().Obj();
    }

    inline BSONArray Element::getValueArray() const {
        dassert(hasValue() && isType(mongo::Array));
        return BSONArray(getValue().Obj());
    }

    inline bool Element::isValueUndefined() const {
        return isType(mongo::Undefined);
    }

    inline OID Element::getValueOID() const {
        dassert(hasValue() && isType(mongo::jstOID));
        return getValue().__oid();
    }

    inline bool Element::getValueBool() const {
        dassert(hasValue() && isType(mongo::Bool));
        return getValue().boolean();
    }

    inline Date_t Element::getValueDate() const {
        dassert(hasValue() && isType(mongo::Date));
        return getValue().date();
    }

    inline bool Element::isValueNull() const {
        return isType(mongo::jstNULL);
    }

    inline StringData Element::getValueSymbol() const {
        dassert(hasValue() && isType(mongo::Symbol));
        return getValueStringOrSymbol();
    }

    inline int32_t Element::getValueInt() const {
        dassert(hasValue() && isType(mongo::NumberInt));
        return getValue()._numberInt();
    }

    inline OpTime Element::getValueTimestamp() const {
        dassert(hasValue() && isType(mongo::Timestamp));
        return getValue()._opTime();
    }

    inline int64_t Element::getValueLong() const {
        dassert(hasValue() && isType(mongo::NumberLong));
        return getValue()._numberLong();
    }

    inline bool Element::isValueMinKey() const {
        return isType(mongo::MinKey);
    }

    inline bool Element::isValueMaxKey() const {
        return isType(mongo::MaxKey);
    }

    inline bool Element::ok() const {
        dassert(_doc != NULL);
        return _repIdx <= kMaxRepIdx;
    }

    inline Document& Element::getDocument() {
        return *_doc;
    }

    inline const Document& Element::getDocument() const {
        return *_doc;
    }

    inline bool Element::isType(BSONType type) const {
        return (getType() == type);
    }

    inline Element::RepIdx Element::getIdx() const {
        return _repIdx;
    }

    inline Element::Element(Document* doc, RepIdx repIdx)
        : _doc(doc)
        , _repIdx(repIdx) {
        dassert(_doc != NULL);
    }

    inline StringData Element::getValueStringOrSymbol() const {
        const BSONElement value = getValue();
        const char* str = value.valuestr();
        const size_t size = value.valuestrsize() - 1;
        return StringData(str, size);
    }

    inline bool operator==(const Element& l, const Element& r) {
        return (l._doc == r._doc) && (l._repIdx == r._repIdx);
    }

    inline bool operator!=(const Element& l, const Element& r) {
        return !(l == r);
    }


} // namespace mutablebson
} // namespace mongo
