/**
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef _WIN32
#ifndef NANOFI_TESTS_CTESTSBASE_H_
#define NANOFI_TESTS_CTESTSBASE_H_

#include <vector>
#include <string>
#include <fstream>
#include <assert.h>
#include <sys/stat.h>

#include "core/file_utils.h"
#include "api/ecu.h"
#include "api/nanofi.h"
#include "TestBase.h"

class FileManager {
public:
    FileManager(const std::string& filePath) {
        assert(!filePath.empty() && "filePath provided cannot be empty!");
        struct stat statbuff;
        assert(!is_directory(filePath.c_str()) && "Provided file is not a filepath");
        filePath_ = filePath;
        remove(filePath_.c_str());
        outputStream_.open(filePath_, std::ios::binary);
    }

    ~FileManager() {
        std::ifstream ifs(filePath_);
        if (ifs.good()) {
            remove(filePath_.c_str());
        }
    }

    void Write(const std::string& str) {
        outputStream_ << str;
    }

    std::string WriteNChars(uint64_t n, char c) {
        std::string s(n, c);
        outputStream_ << s;
        return s;
    }

    std::string getFilePath() const {
        return filePath_;
    }

    void OpenStream() {
        outputStream_.open(filePath_, std::ios::binary|std::ios::app);
    }

    void CloseStream() {
        outputStream_.flush();
        outputStream_.close();
    }

    uint64_t GetFileSize() {
        CloseStream();
        struct stat buff;
        if (stat(filePath_.c_str(), &buff) == 0) {
            return buff.st_size;
        }
        return 0;
    }

private:
    std::string filePath_;
    std::ofstream outputStream_;
};

class TailFileTestResourceManager {
public:
    TailFileTestResourceManager(const std::string& processor_name, void(*callback)(processor_session * ps, processor_context * ctx)) {
        std::string port_str = utils::IdGenerator::getIdGenerator()->generate().to_string();
        nifi_port port;
        port.port_id = const_cast<char*>(port_str.c_str());
        const char * instance_str = "nifi";
        instance_ = create_instance(instance_str, &port);
        add_custom_processor(processor_name.c_str(), callback);
        processor_ = create_processor(processor_name.c_str(), instance_);
    }

    ~TailFileTestResourceManager() {
        remove_directory("./contentrepository");
        char uuid_str[37];
        get_proc_uuid_from_processor(processor_, uuid_str);
        delete_all_flow_files_from_proc(uuid_str);
        struct processor_params * tmp, * pp = NULL;
        HASH_ITER(hh, procparams, pp, tmp) {
            HASH_DEL(procparams, pp);
            free(pp);
        }
        free_standalone_processor(processor_);
        free_instance(instance_);
    }

    standalone_processor * getProcessor() const {
        return processor_;
    }

    nifi_instance * getInstance() const {
        return instance_;
    }

private:
    nifi_instance * instance_;
    standalone_processor * processor_;
};

class TestControllerWithTemporaryWorkingDirectory {
public:
  TestControllerWithTemporaryWorkingDirectory()
    : old_cwd_(get_current_working_directory()) {
    char format[] = "/tmp/ctest_temp_dir.XXXXXX";
    std::string temp_dir = test_controller_.createTempDirectory(format);
    int result = change_current_working_directory(temp_dir.c_str());
    if (result != 0) {
      throw std::runtime_error("Could not change to temporary directory " + temp_dir);
    }
  }

  ~TestControllerWithTemporaryWorkingDirectory() {
    chdir(old_cwd_);
    free(old_cwd_);
  }

private:
  TestController test_controller_;
  char *old_cwd_;
};

struct processor_params * invoke_processor(TailFileTestResourceManager& mgr, const char * filePath) {
    standalone_processor * proc = mgr.getProcessor();
    set_standalone_property(proc, "file_path", filePath);
    set_standalone_property(proc, "delimiter", ";");

    flow_file_record * new_ff = invoke(proc);

    char uuid_str[37];
    get_proc_uuid_from_processor(proc, uuid_str);
    struct processor_params * pp = get_proc_params(uuid_str);
    return pp;
}

#endif /* NANOFI_TESTS_CTESTSBASE_H_ */
#endif