#pragma once

/*
 * Copyright (C) 2018 "IoT.bzh"
 * Author Loïc Collignon <loic.collignon@iot.bzh>
 *
 * 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.
 */

#include <exception>
#include <functional>
#include <sstream>
#include <vector>
#include <map>
#include <cassert>

#include "config_entry.hpp"
#include "ahl-4a.hpp"

#define HL_API_NAME "ahl-4a"
#define HL_API_INFO "Audio high level API for AGL applications"
#define HAL_MGR_API "4a-hal-manager"

extern "C" {

    #define AFB_BINDING_VERSION 0
    #include <afb/afb-binding.h>
    #include <string.h>
    #include <ctl-config.h>

    int afbBindingVdyn(afb_dynapi* handle);
    int ahl_api_create(void*, struct afb_dynapi*);
};

namespace ext
{
    template<class T>
    typename T::iterator find(T& container, const typename T::value_type& value)
    {
        return std::find(std::begin(container), std::end(container), value);
    }

    template<class T, class UnaryPredicate>
    typename T::iterator find_if(T& container, UnaryPredicate pred)
    {
        return std::find_if(std::begin(container), std::end(container), pred);
    }

    template<class T, class UnaryPredicate>
    typename T::iterator cfind_if(T& container, UnaryPredicate pred)
    {
        return std::find_if(std::begin(container), std::end(container), pred);
    }
}

class ahl_binding_t
{
    using role_action = std::function<void(afb_request*, std::string, std::string, json_object*)>;
    
private:
    afb_dynapi* handle_;
    
    ahl_4a_t config_;
    std::map<std::string, role_action> actions_;
    std::vector<role_t> opened_roles_;
    
    explicit ahl_binding_t();
    
    void load_static_verbs();
    void load_controller_api();
    int load_controller_config(const std::string& path);
    int load_config(CtlSectionT* section, json_object* o);
    
    void volume(afb_request* req, std::string role, std::string stream, json_object* arg);
    void open(afb_request* req, std::string role, std::string stream, json_object* arg);
    void close(afb_request* req, std::string role, std::string stream, json_object* arg);
    void interrupt(afb_request* req, std::string role, std::string stream, json_object* arg);

    void policy_open(afb_request* req, const role_t& role);
    
public:
    static ahl_binding_t& instance();
    int preinit(afb_dynapi* handle);
    int init();
    void event(std::string name, json_object* arg);
    void audiorole(afb_request* req);
    void get_roles(afb_request* req);
};