/**
 * @file validation.h
 * @author Michal Vasko <mvasko@cesnet.cz>
 * @brief Validation routines.
 *
 * Copyright (c) 2019 CESNET, z.s.p.o.
 *
 * 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 LY_VALIDATION_H_
#define LY_VALIDATION_H_

#include "log.h"
#include "parser_data.h"
#include "plugins_types.h"
#include "tree_data.h"

enum lyd_diff_op;

/**
 * @brief Add new changes into a diff. They are always merged.
 *
 * @param[in] node Node/subtree to add.
 * @param[in] op Operation of the change.
 * @param[in,out] diff Diff to update.
 * @return LY_ERR value.
 */
LY_ERR lyd_val_diff_add(const struct lyd_node *node, enum lyd_diff_op op, struct lyd_node **diff);

/**
 * @brief Finish validation of nodes and attributes. Specifically, when (is processed first) and type validation.
 *
 * !! It is assumed autodeleted nodes cannot be in the unresolved node type set !!
 *
 * @param[in,out] tree Data tree, is updated if some nodes are autodeleted.
 * @param[in] node_when Set with nodes with "when" conditions, can be NULL.
 * @param[in] node_types Set with nodes with unresolved types, can be NULL
 * @param[in] meta_types Set with metdata with unresolved types, can be NULL.
 * @param[in] format Format of the unresolved data.
 * @param[in] prefix_data Format-specific data for resolving any prefixes (see ::ly_resolve_prefix).
 * @param[in,out] diff Validation diff.
 * @return LY_ERR value.
 */
LY_ERR lyd_validate_unres(struct lyd_node **tree, struct ly_set *node_when, struct ly_set *node_types, struct ly_set *meta_types,
        LY_PREFIX_FORMAT format, void *prefix_data, struct lyd_node **diff);

/**
 * @brief Validate new siblings. Specifically, check duplicated instances, autodelete default values and cases.
 *
 * !! It is assumed autodeleted nodes cannot yet be in the unresolved node type set !!
 *
 * @param[in,out] first First sibling.
 * @param[in] sparent Schema parent of the siblings, NULL for top-level siblings.
 * @param[in] mod Module of the siblings, NULL for nested siblings.
 * @param[in,out] diff Validation diff.
 * @return LY_ERR value.
 */
LY_ERR lyd_validate_new(struct lyd_node **first, const struct lysc_node *sparent, const struct lys_module *mod,
        struct lyd_node **diff);

/**
 * @brief Perform all remaining validation tasks, the data tree must be final when calling this function.
 *
 * @param[in] first First sibling.
 * @param[in] sparent Schema parent of the siblings, NULL for top-level siblings.
 * @param[in] mod Module of the siblings, NULL for nested siblings.
 * @param[in] val_opts Validation options (@ref datavalidationoptions).
 * @param[in] op Operation to validate (@ref datavalidateop) or 0 for data tree
 * @return LY_ERR value.
 */
LY_ERR lyd_validate_final_r(struct lyd_node *first, const struct lysc_node *sparent, const struct lys_module *mod,
        uint32_t val_opts, LYD_VALIDATE_OP op);

#endif /* LY_VALIDATION_H_ */