/**

 * @file Libyang.hpp

 * @author Mislav Novakovic <mislav.novakovic@sartura.hr>

 * @brief Class implementation for libyang C header libyang.h.

 *

 * Copyright (c) 2017 Deutsche Telekom AG.

 *

 * This source code is licensed under BSD 3-Clause License (the "License").

 * You may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     https://opensource.org/licenses/BSD-3-Clause

 */

#ifndef LIBYANG_CPP_H

#define LIBYANG_CPP_H

#include <iostream>

#include <memory>

#include <exception>

#include <functional>

#include <vector>

#include "Internal.hpp"

extern "C" {

#include "libyang.h"

}

namespace libyang {

/**

 * @defgroup classes C++/Python

 * @{

 *

 * Class wrappers for data structures and functions to manipulate and access instance data tree.

 */

/**

 * @brief class for wrapping ly_ctx.

 * @class Context

 */

class Context

{

public:

    /** wrapper for struct ly_ctx, for internal use only */

    Context(struct ly_ctx *ctx, S_Deleter deleter);

    /** wrapper for [ly_ctx_new](@ref ly_ctx_new) */

    explicit Context(const char *search_dir = nullptr, int options = 0);

    /** wrapper for [ly_ctx_new_ylpath](@ref ly_ctx_new_ylpath) */

    Context(const char *search_dir, const char *path, LYD_FORMAT format, int options = 0);

    /** wrapper for [ly_ctx_new_ylmem](@ref ly_ctx_new_ylmem) */

    Context(const char *search_dir, LYD_FORMAT format, const char *data, int options = 0);

    ~Context();

    /** wrapper for [ly_ctx_set_searchdir](@ref ly_ctx_set_searchdir) */

    int set_searchdir(const char *search_dir);

    /** wrapper for [ly_ctx_unset_searchdirs](@ref ly_ctx_unset_searchdirs) */

    void unset_searchdirs(int idx) {return ly_ctx_unset_searchdirs(ctx, idx);};

    /** wrapper for [ly_ctx_get_searchdirs](@ref ly_ctx_get_searchdirs) */

    std::vector<std::string> get_searchdirs();

    /** wrapper for [ly_ctx_set_allimplemented](@ref ly_ctx_set_allimplemented) */

    void set_allimplemented() {return ly_ctx_set_allimplemented(ctx);};

    /** wrapper for [ly_ctx_unset_allimplemented](@ref ly_ctx_unset_allimplemented) */

    void unset_allimplemented() {return ly_ctx_unset_allimplemented(ctx);};

    /** wrapper for [ly_ctx_set_disable_searchdirs](@ref ly_ctx_set_disable_searchdirs) */

    void set_disable_searchdirs() {return ly_ctx_set_disable_searchdirs(ctx);};

    /** wrapper for [ly_ctx_unset_disable_searchdirs](@ref ly_ctx_unset_disable_searchdirs) */

    void unset_disable_searchdirs() {return ly_ctx_unset_disable_searchdirs(ctx);};

    /** wrapper for [ly_ctx_set_disable_searchdir_cwd](@ref ly_ctx_set_disable_searchdir_cwd) */

    void set_disable_searchdir_cwd() {return ly_ctx_set_disable_searchdir_cwd(ctx);};

    /** wrapper for [ly_ctx_unset_disable_searchdir_cwd](@ref ly_ctx_unset_disable_searchdir_cwd) */

    void unset_disable_searchdir_cwd() {return ly_ctx_unset_disable_searchdir_cwd(ctx);};

    /** wrapper for [ly_ctx_set_prefer_searchdirs](@ref ly_ctx_set_disable_searchdirs) */

    void set_prefer_searchdirs() {return ly_ctx_set_prefer_searchdirs(ctx);};

    /** wrapper for [ly_ctx_unset_prefer_searchdirs](@ref ly_ctx_unset_prefer_searchdirs) */

    void unset_prefer_searchdirs() {return ly_ctx_unset_prefer_searchdirs(ctx);};

    /** wrapper for [ly_ctx_info](@ref ly_ctx_info) */

    S_Data_Node info();

    /** wrapper for [ly_ctx_get_module_iter](@ref ly_ctx_get_module_iter) */

    std::vector<S_Module> get_module_iter();

    /** wrapper for [ly_ctx_get_disabled_module_iter](@ref ly_ctx_get_disabled_module_iter) */

    std::vector<S_Module> get_disabled_module_iter();

    /** wrapper for [ly_ctx_get_module](@ref ly_ctx_get_module) */

    S_Module get_module(const char *name, const char *revision = nullptr, int implemented = 0);

    /** wrapper for [ly_ctx_get_module_older](@ref ly_ctx_get_module_older) */

    S_Module get_module_older(S_Module module);

    /** wrapper for [ly_ctx_load_module](@ref ly_ctx_load_module) */

    S_Module load_module(const char *name, const char *revision = nullptr);

    /** wrapper for [ly_ctx_get_module_by_ns](@ref ly_ctx_get_module_by_ns) */

    S_Module get_module_by_ns(const char *ns, const char *revision = nullptr, int implemented = 0);

    /** wrapper for [ly_ctx_get_submodule](@ref ly_ctx_get_submodule) */

    S_Submodule get_submodule(const char *module, const char *revision = nullptr, const char *submodule = nullptr, const char *sub_revision = nullptr);

    /** wrapper for [ly_ctx_get_submodule2](@ref ly_ctx_get_submodule2) */

    S_Submodule get_submodule2(S_Module main_module, const char *submodule = nullptr);

    /** wrapper for [ly_ctx_get_node](@ref ly_ctx_get_node) */

    S_Schema_Node get_node(S_Schema_Node start, const char *data_path, int output = 0);

    /** wrapper for [lys_getnext](@ref lys_getnext) */

    std::vector<S_Schema_Node> data_instantiables(int options);

    /** wrapper for [ly_ctx_find_path](@ref ly_ctx_find_path) */

    S_Set find_path(const char *schema_path);

    /** wrapper for [ly_ctx_clean](@ref ly_ctx_clean) */

    void clean();

    struct mod_missing_cb_return {

        LYS_INFORMAT format;

        const char *data;

    };

    using mod_missing_cb_t = std::function<mod_missing_cb_return(const char *mod_name, const char *mod_rev, const char *submod_name, const char *sub_rev)>;

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

    /** @short Add a missing include or import module callback

    When libyang hits a missing module, the @arg callback will be called. If it can accommodate this request, it should return an

    appropriate mod_missing_cb_return struct. If it is needed to free the actual module "source code", then @arg deleter should be

    provided; it is then responsible for deallocation of the resulting mod_missing_cb_return::data.

    */

    void add_missing_module_callback(const mod_missing_cb_t &callback, const mod_missing_deleter_t &deleter = mod_missing_deleter_t());

    /* functions */

    /** wrapper for [lyd_parse_mem](@ref lyd_parse_mem) */

    S_Data_Node parse_data_mem(const char *data, LYD_FORMAT format, int options = 0);

    /** wrapper for [lyd_parse_fd](@ref lyd_parse_fd) */

    S_Data_Node parse_data_fd(int fd, LYD_FORMAT format, int options = 0);

    /** wrapper for [lyd_parse_path](@ref lyd_parse_path) */

    S_Data_Node parse_data_path(const char *path, LYD_FORMAT format, int options = 0);

    /** wrapper for [lyd_parse_xml](@ref lyd_parse_xml) */

    S_Data_Node parse_data_xml(S_Xml_Elem elem, int options = 0);

    /** wrapper for [lys_parse_mem](@ref lys_parse_mem) */

    S_Module parse_module_mem(const char *data, LYS_INFORMAT format);

    /** wrapper for [lys_parse_fd](@ref lys_parse_fd) */

    S_Module parse_module_fd(int fd, LYS_INFORMAT format);

    /** wrapper for [lys_parse_path](@ref lys_parse_path) */

    S_Module parse_module_path(const char *path, LYS_INFORMAT format);

    friend std::vector<S_Error> get_ly_errors(S_Context context);

    friend Data_Node;

    friend Deleter;

    friend Error;

    std::vector<std::pair<mod_missing_cb_t, mod_missing_deleter_t>> mod_missing_cb;

    std::vector<const mod_missing_deleter_t *> mod_missing_deleter;

    static const char* cpp_mod_missing_cb(const char *mod_name, const char *mod_rev, const char *submod_name, const char *sub_rev, void *user_data, LYS_INFORMAT *format, void(**free_module_data)(void *model_data, void *user_data));

    static void cpp_mod_missing_deleter(void *data, void *user_data);

    /* SWIG specific */

    struct ly_ctx *swig_ctx() {return ctx;};

    std::vector<void*> wrap_cb_l;

private:

    struct ly_ctx *ctx;

    S_Deleter deleter;

};

S_Context create_new_Context(struct ly_ctx *ctx);

/**

 * @brief class for wrapping [ly_err_item](@ref ly_err_item).

 * @class Error

 */

class Error

{

public:

    /** wrapper for [ly_err_item](@ref ly_err_item) */

    Error(struct ly_err_item *eitem);

    ~Error() {};

    /** get no variable from [ly_err_item](@ref ly_err_item) */

    LY_ERR err() throw() {return eitem->no;};

    /** get vecode variable from [ly_err_item](@ref ly_err_item)*/

    LY_VECODE vecode() throw() {return eitem->vecode;};

    /** get errmsg variable from [ly_err_item](@ref ly_err_item)*/

    const char *errmsg() const throw() {return eitem->msg ? eitem->msg : "";};

    /** get errpath variable from [ly_err_item](@ref ly_err_item)*/

    const char *errpath() const throw() {return eitem->path ? eitem->path : "";};

    /** get errapptag variable from [ly_err_item](@ref ly_err_item)*/

    const char *errapptag() const throw() {return eitem->apptag ? eitem->path : "";};

private:

	struct ly_err_item *eitem;

};

std::vector<S_Error> get_ly_errors(S_Context context);

int set_log_options(int options);

LY_LOG_LEVEL set_log_verbosity(LY_LOG_LEVEL level);

/**

 * @brief class for wrapping [ly_set](@ref ly_set).

 * @class Set

 */

class Set

{

public:

    /** wrapper for [ly_set_new](@ref ly_set_new) */

    Set(struct ly_set *set, S_Deleter);

    Set();

    ~Set();

    /** get size variable from [ly_set](@ref ly_set)*/

    unsigned int size() {return set->size;};

    /** get number variable from [ly_set](@ref ly_set)*/

    unsigned int number() {return set->number;};

    /** get d variable from [ly_set_set](@ref ly_set_set)*/

    std::vector<S_Data_Node> data();

    /** get s variable from [ly_set_set](@ref ly_set_set)*/

    std::vector<S_Schema_Node> schema();

    /* functions */

    /** wrapper for [ly_set_dup](@ref ly_set_dup) */

    S_Set dup();

    /** wrapper for [ly_set_add](@ref ly_set_add) */

    int add(S_Data_Node node, int options = 0);

    /** wrapper for [ly_set_add](@ref ly_set_add) */

    int add(S_Schema_Node node, int options = 0);

    /** wrapper for [ly_set_contains](@ref ly_set_contains) */

    int contains(S_Data_Node node);

    /** wrapper for [ly_set_contains](@ref ly_set_contains) */

    int contains(S_Schema_Node node);

    /** wrapper for [ly_set_clean](@ref ly_set_clean) */

    int clean();

    /** wrapper for [ly_set_rm](@ref ly_set_rm) */

    int rm(S_Data_Node node);

    /** wrapper for [ly_set_rm](@ref ly_set_rm) */

    int rm(S_Schema_Node node);

    /** wrapper for [ly_set_rm_index](@ref ly_set_rm_index) */

    int rm_index(unsigned int index);

private:

    struct ly_set *set;

    S_Deleter deleter;

};

/**@} */

}

#endif