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/*
 * Copyright (c) 2018 TOYOTA MOTOR CORPORATION
 *
 * 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.
 */

#ifndef TMCAGLWM_POLICY_MANAGER_HPP
#define TMCAGLWM_POLICY_MANAGER_HPP


#include <unordered_map>
#include <vector>


struct json_object;
struct sd_event;


class PolicyManager {

public:
    explicit PolicyManager();
    ~PolicyManager() = default;

    using Handler = std::function<void(json_object *)>;

    typedef struct {
        Handler  onStateTransitioned;
        Handler  onError;
    } CallbackTable;

    int initialize();
    void registerCallback(CallbackTable callback_table);
    int inputEvent(json_object* json_in);
    std::string roleToCategory(const char* role);

private:
    // Disable copy and move
    PolicyManager(PolicyManager const &) = delete;
    PolicyManager &operator=(PolicyManager const &) = delete;
    PolicyManager(PolicyManager &&) = delete;
    PolicyManager &operator=(PolicyManager &&) = delete;

    // Convert map
    std::unordered_map<std::string, int> eventname2no_;
    std::unordered_map<std::string, int> categoryname2no_;
    std::unordered_map<std::string, int> areaname2no_;

    std::unordered_map<std::string, std::string> role2category_;
    std::unordered_map<std::string, std::string> category2role_;
    std::unordered_map<std::string, std::string> role2defaultarea_;

#if 0
    struct AreaState {
        std::string name;
        std::string role;
    } AreaState;

    struct LayoutState {
        std::string name;
        std::vector<AreaState> areas;
    } LayoutState;

    struct LayerState {
        std::string name;
        LayoutState layout;
    } LayerState;
#endif

    int initializeSdEventLoop();

    // Load role.db
    int loadRoleDb();

    // Load layout.db
    int loadLayoutDb();

    const char* getStringFromJson(json_object* obj, const char* key);
    int inputJsonFilie(const char* file, json_object** obj);
    std::vector<std::string> parseString(std::string str, char delimiter);
    std::string deleteSpace(std::string str);

};


extern const char* getStringFromJson(json_object* obj, const char* key);
extern int getIntFromJson(json_object* obj, const char* key);


#endif  // TMCAGLWM_POLICY_MANAGER_HPP