/*
 * Copyright (C) 2018 The Android Open Source Project
 *
 * Licensed 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.
 */

#pragma once

#include <set>
#include <string>
#include <unordered_map>
#include <vector>

class Modprobe {
  public:
    Modprobe(const std::vector<std::string>&);

    bool LoadListedModules();
    bool LoadWithAliases(const std::string& module_name, bool strict,
                         const std::string& parameters = "");
    bool Remove(const std::string& module_name);
    std::vector<std::string> ListModules(const std::string& pattern);
    bool GetAllDependencies(const std::string& module, std::vector<std::string>* pre_dependencies,
                            std::vector<std::string>* dependencies,
                            std::vector<std::string>* post_dependencies);
    void EnableBlacklist(bool enable);
    void EnableVerbose(bool enable);

  private:
    std::string MakeCanonical(const std::string& module_path);
    bool InsmodWithDeps(const std::string& module_name, const std::string& parameters);
    bool Insmod(const std::string& path_name, const std::string& parameters);
    bool Rmmod(const std::string& module_name);
    std::vector<std::string> GetDependencies(const std::string& module);
    bool ModuleExists(const std::string& module_name);

    bool ParseDepCallback(const std::string& base_path, const std::vector<std::string>& args);
    bool ParseAliasCallback(const std::vector<std::string>& args);
    bool ParseSoftdepCallback(const std::vector<std::string>& args);
    bool ParseLoadCallback(const std::vector<std::string>& args);
    bool ParseOptionsCallback(const std::vector<std::string>& args);
    bool ParseBlacklistCallback(const std::vector<std::string>& args);
    void ParseCfg(const std::string& cfg, std::function<bool(const std::vector<std::string>&)> f);

    std::vector<std::pair<std::string, std::string>> module_aliases_;
    std::unordered_map<std::string, std::vector<std::string>> module_deps_;
    std::vector<std::pair<std::string, std::string>> module_pre_softdep_;
    std::vector<std::pair<std::string, std::string>> module_post_softdep_;
    std::vector<std::string> module_load_;
    std::unordered_map<std::string, std::string> module_options_;
    std::set<std::string> module_blacklist_;
    bool blacklist_enabled = false;
};