/**
 *    Copyright 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.
 */

#pragma once

#include <memory>
#include <vector>

#include "mongo/base/status.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/db/clientcursor.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/repl/collection_cloner.h"
#include "mongo/db/repl/replication_executor_test_fixture.h"
#include "mongo/executor/network_interface_mock.h"
#include "mongo/stdx/mutex.h"
#include "mongo/stdx/condition_variable.h"
#include "mongo/util/net/hostandport.h"

namespace mongo {

struct CollectionOptions;
class OperationContext;

namespace repl {

class BaseCloner;
class ClonerStorageInterfaceMock;

class BaseClonerTest : public ReplicationExecutorTest {
public:
    typedef executor::NetworkInterfaceMock::NetworkOperationIterator NetworkOperationIterator;

    /**
     * Creates a cursor response with given array of documents.
     */
    static BSONObj createCursorResponse(CursorId cursorId,
                                        const std::string& ns,
                                        const BSONArray& docs,
                                        const char* batchFieldName);

    static BSONObj createCursorResponse(CursorId cursorId,
                                        const BSONArray& docs,
                                        const char* batchFieldName);

    static BSONObj createCursorResponse(CursorId cursorId, const BSONArray& docs);

    /**
     * Creates a listCollections response with given array of index specs.
     */
    static BSONObj createListCollectionsResponse(CursorId cursorId,
                                                 const BSONArray& colls,
                                                 const char* batchFieldName);

    static BSONObj createListCollectionsResponse(CursorId cursorId, const BSONArray& colls);

    /**
     * Creates a listIndexes response with given array of index specs.
     */
    static BSONObj createListIndexesResponse(CursorId cursorId,
                                             const BSONArray& specs,
                                             const char* batchFieldName);

    static BSONObj createListIndexesResponse(CursorId cursorId, const BSONArray& specs);

    static const HostAndPort target;
    static const NamespaceString nss;
    static const BSONObj idIndexSpec;

    BaseClonerTest();

    virtual void clear();

    void setStatus(const Status& status);
    const Status& getStatus() const;

    void scheduleNetworkResponse(NetworkOperationIterator noi, const BSONObj& obj);
    void scheduleNetworkResponse(NetworkOperationIterator noi,
                                 ErrorCodes::Error code,
                                 const std::string& reason);
    void scheduleNetworkResponse(const BSONObj& obj);
    void scheduleNetworkResponse(ErrorCodes::Error code, const std::string& reason);
    void processNetworkResponse(const BSONObj& obj);
    void processNetworkResponse(ErrorCodes::Error code, const std::string& reason);
    void finishProcessingNetworkResponse();

    /**
     * Tests life cycle functionality.
     */
    virtual BaseCloner* getCloner() const = 0;
    void testLifeCycle();

protected:
    void setUp() override;
    void tearDown() override;

    std::unique_ptr<ClonerStorageInterfaceMock> storageInterface;

private:
    // Protects member data of this base cloner fixture.
    mutable stdx::mutex _mutex;

    stdx::condition_variable _setStatusCondition;

    Status _status;
};

class ClonerStorageInterfaceMock : public CollectionCloner::StorageInterface {
public:
    using InsertCollectionFn = stdx::function<Status(
        OperationContext*, const NamespaceString&, const std::vector<BSONObj>&)>;
    using BeginCollectionFn = stdx::function<Status(OperationContext*,
                                                    const NamespaceString&,
                                                    const CollectionOptions&,
                                                    const std::vector<BSONObj>&)>;
    using InsertMissingDocFn =
        stdx::function<Status(OperationContext*, const NamespaceString&, const BSONObj&)>;
    using DropUserDatabases = stdx::function<Status(OperationContext*)>;

    Status beginCollection(OperationContext* txn,
                           const NamespaceString& nss,
                           const CollectionOptions& options,
                           const std::vector<BSONObj>& specs) override;

    Status insertDocuments(OperationContext* txn,
                           const NamespaceString& nss,
                           const std::vector<BSONObj>& docs) override;

    Status commitCollection(OperationContext* txn, const NamespaceString& nss) override;

    Status insertMissingDoc(OperationContext* txn,
                            const NamespaceString& nss,
                            const BSONObj& doc) override;

    Status dropUserDatabases(OperationContext* txn);

    BeginCollectionFn beginCollectionFn;
    InsertCollectionFn insertDocumentsFn;
    InsertMissingDocFn insertMissingDocFn;
    DropUserDatabases dropUserDatabasesFn;
};

}  // namespace repl
}  // namespace mongo