/*
 * Index functions
 *
 * Copyright (C) 2009-2023, Joachim Metz <joachim.metz@gmail.com>
 *
 * Refer to AUTHORS for acknowledgements.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#include <common.h>
#include <memory.h>
#include <types.h>

#include "libesedb_catalog_definition.h"
#include "libesedb_data_definition.h"
#include "libesedb_definitions.h"
#include "libesedb_io_handle.h"
#include "libesedb_index.h"
#include "libesedb_libbfio.h"
#include "libesedb_libcerror.h"
#include "libesedb_libcnotify.h"
#include "libesedb_libfcache.h"
#include "libesedb_libfdata.h"
#include "libesedb_page_tree.h"
#include "libesedb_page_tree_key.h"
#include "libesedb_record.h"
#include "libesedb_types.h"

/* Creates an index
 * Make sure the value index is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_initialize(
     libesedb_index_t **index,
     libbfio_handle_t *file_io_handle,
     libesedb_io_handle_t *io_handle,
     libesedb_table_definition_t *table_definition,
     libesedb_table_definition_t *template_table_definition,
     libesedb_catalog_definition_t *index_catalog_definition,
     libfdata_vector_t *pages_vector,
     libfcache_cache_t *pages_cache,
     libfdata_vector_t *long_values_pages_vector,
     libfcache_cache_t *long_values_pages_cache,
     libesedb_page_tree_t *table_page_tree,
     libesedb_page_tree_t *long_values_page_tree,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_initialize";

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	if( *index != NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
		 "%s: invalid index value already set.",
		 function );

		return( -1 );
	}
	if( table_definition == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid table definition.",
		 function );

		return( -1 );
	}
	if( index_catalog_definition == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index catalog definition.",
		 function );

		return( -1 );
	}
	internal_index = memory_allocate_structure(
	                  libesedb_internal_index_t );

	if( internal_index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_MEMORY,
		 LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
		 "%s: unable to create index.",
		 function );

		goto on_error;
	}
	if( memory_set(
	     internal_index,
	     0,
	     sizeof( libesedb_internal_index_t ) ) == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_MEMORY,
		 LIBCERROR_MEMORY_ERROR_SET_FAILED,
		 "%s: unable to clear index.",
		 function );

		memory_free(
		 internal_index );

		return( -1 );
	}
	/* TODO (template) table definition required ? */

	if( libesedb_page_tree_initialize(
	     &( internal_index->index_page_tree ),
	     io_handle,
	     pages_vector,
	     pages_cache,
	     index_catalog_definition->identifier,
	     index_catalog_definition->father_data_page_number,
	     NULL,
	     NULL,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to create index page tree.",
		 function );

		goto on_error;
	}
	internal_index->io_handle                 = io_handle;
	internal_index->file_io_handle            = file_io_handle;
	internal_index->table_definition          = table_definition;
	internal_index->template_table_definition = template_table_definition;
	internal_index->index_catalog_definition  = index_catalog_definition;
	internal_index->pages_vector              = pages_vector;
	internal_index->pages_cache               = pages_cache;
	internal_index->long_values_pages_vector  = long_values_pages_vector;
	internal_index->long_values_pages_cache   = long_values_pages_cache;
	internal_index->table_page_tree           = table_page_tree;
	internal_index->long_values_page_tree     = long_values_page_tree;

	*index = (libesedb_index_t *) internal_index;

	return( 1 );

on_error:
	if( internal_index != NULL )
	{
		memory_free(
		 internal_index );
	}
	return( -1 );
}

/* Frees an index
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_free(
     libesedb_index_t **index,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_free";
	int result                                = 1;

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	if( *index != NULL )
	{
		internal_index = (libesedb_internal_index_t *) *index;
		*index         = NULL;

		/* The io_handle, file_io_handle, table_definition, template_table_definition,
		 * index_catalog_definition, pages_vector, pages_cache, table_page_tree and
		 * long_values_page_tree references are freed elsewhere
		 */
		if( libesedb_page_tree_free(
		     &( internal_index->index_page_tree ),
		     error ) != 1 )
		{
			libcerror_error_set(
			 error,
			 LIBCERROR_ERROR_DOMAIN_RUNTIME,
			 LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
			 "%s: unable to free index page tree.",
			 function );

			result = -1;
		}
		memory_free(
		 internal_index );
	}
	return( result );
}

/* Retrieves the index identifier or Father Data Page (FDP) object identifier
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_get_identifier(
     libesedb_index_t *index,
     uint32_t *identifier,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_get_identifier";

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	internal_index = (libesedb_internal_index_t *) index;

	if( libesedb_catalog_definition_get_identifier(
	     internal_index->index_catalog_definition,
	     identifier,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve catalog definition identifier.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Retrieves the size of the UTF-8 encoded string of the index name
 * The returned size includes the end of string character
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_get_utf8_name_size(
     libesedb_index_t *index,
     size_t *utf8_string_size,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_get_utf8_string_size";

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	internal_index = (libesedb_internal_index_t *) index;

	if( internal_index->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid index - missing IO handle.",
		 function );

		return( -1 );
	}
	if( libesedb_catalog_definition_get_utf8_name_size(
	     internal_index->index_catalog_definition,
	     utf8_string_size,
	     internal_index->io_handle->ascii_codepage,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve UTF-8 string size.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Retrieves the UTF-8 encoded string of the index name
 * The size should include the end of string character
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_get_utf8_name(
     libesedb_index_t *index,
     uint8_t *utf8_string,
     size_t utf8_string_size,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_get_utf8_string";

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	internal_index = (libesedb_internal_index_t *) index;

	if( internal_index->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid index - missing IO handle.",
		 function );

		return( -1 );
	}
	if( libesedb_catalog_definition_get_utf8_name(
	     internal_index->index_catalog_definition,
	     utf8_string,
	     utf8_string_size,
	     internal_index->io_handle->ascii_codepage,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_CONVERSION,
		 LIBCERROR_CONVERSION_ERROR_GENERIC,
		 "%s: unable to retrieve UTF-8 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Retrieves the size of the UTF-16 encoded string of the index name
 * The returned size includes the end of string character
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_get_utf16_name_size(
     libesedb_index_t *index,
     size_t *utf16_string_size,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_get_utf16_string_size";

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	internal_index = (libesedb_internal_index_t *) index;

	if( internal_index->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid index - missing IO handle.",
		 function );

		return( -1 );
	}
	if( libesedb_catalog_definition_get_utf16_name_size(
	     internal_index->index_catalog_definition,
	     utf16_string_size,
	     internal_index->io_handle->ascii_codepage,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve UTF-16 string size.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Retrieves the UTF-16 encoded string of the index name
 * The size should include the end of string character
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_get_utf16_name(
     libesedb_index_t *index,
     uint16_t *utf16_string,
     size_t utf16_string_size,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_get_utf16_string";

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	internal_index = (libesedb_internal_index_t *) index;

	if( internal_index->io_handle == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
		 "%s: invalid index - missing IO handle.",
		 function );

		return( -1 );
	}
	if( libesedb_catalog_definition_get_utf16_name(
	     internal_index->index_catalog_definition,
	     utf16_string,
	     utf16_string_size,
	     internal_index->io_handle->ascii_codepage,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_CONVERSION,
		 LIBCERROR_CONVERSION_ERROR_GENERIC,
		 "%s: unable to retrieve UTF-16 string.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Retrieves the number of records in the index
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_get_number_of_records(
     libesedb_index_t *index,
     int *number_of_records,
     libcerror_error_t **error )
{
	libesedb_internal_index_t *internal_index = NULL;
	static char *function                     = "libesedb_index_get_number_of_records";

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	internal_index = (libesedb_internal_index_t *) index;

	if( libesedb_page_tree_get_number_of_leaf_values(
	     internal_index->index_page_tree,
	     internal_index->file_io_handle,
	     number_of_records,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve number of leaf values from index page tree.",
		 function );

		return( -1 );
	}
	return( 1 );
}

/* Retrieves a specific record
 * Returns 1 if successful or -1 on error
 */
int libesedb_index_get_record(
     libesedb_index_t *index,
     int record_entry,
     libesedb_record_t **record,
     libcerror_error_t **error )
{
	libesedb_data_definition_t *index_data_definition  = NULL;
	libesedb_data_definition_t *record_data_definition = NULL;
	libesedb_internal_index_t *internal_index          = NULL;
	libesedb_page_tree_key_t *key                      = NULL;
	uint8_t *index_data                                = NULL;
	static char *function                              = "libesedb_index_get_record";
	size_t index_data_size                             = 0;

	if( index == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid index.",
		 function );

		return( -1 );
	}
	internal_index = (libesedb_internal_index_t *) index;

	if( record == NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
		 LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
		 "%s: invalid record.",
		 function );

		return( -1 );
	}
	if( *record != NULL )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
		 "%s: invalid record value already set.",
		 function );

		return( -1 );
	}
	if( libesedb_page_tree_get_leaf_value_by_index(
	     internal_index->index_page_tree,
	     internal_index->file_io_handle,
	     record_entry,
	     &index_data_definition,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve leaf value: %d from index values tree.",
		 function,
		 record_entry );

		goto on_error;
	}
	if( libesedb_data_definition_read_data(
	     index_data_definition,
	     internal_index->file_io_handle,
	     internal_index->io_handle,
	     internal_index->pages_vector,
	     internal_index->pages_cache,
	     &index_data,
	     &index_data_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_IO,
		 LIBCERROR_IO_ERROR_READ_FAILED,
		 "%s: unable to read index data definition data.",
		 function );

		goto on_error;
	}
	if( libesedb_data_definition_free(
	     &index_data_definition,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
		 "%s: unable to free index data definition.",
		 function );

		goto on_error;
	}
	if( libesedb_page_tree_key_initialize(
	     &key,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to create key.",
		 function );

		goto on_error;
	}
	if( libesedb_page_tree_key_set_data(
	     key,
	     index_data,
	     index_data_size,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_SET_FAILED,
		 "%s: unable to set index data in key.",
		 function );

		goto on_error;
	}
	key->type = LIBESEDB_KEY_TYPE_INDEX_VALUE;

	if( libesedb_page_tree_get_leaf_value_by_key(
	     internal_index->table_page_tree,
	     internal_index->file_io_handle,
	     key,
	     &record_data_definition,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_GET_FAILED,
		 "%s: unable to retrieve leaf value by key.",
		 function );

		goto on_error;
	}
	if( libesedb_page_tree_key_free(
	     &key,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_FINALIZE_FAILED,
		 "%s: unable to free key.",
		 function );

		goto on_error;
	}
	if( libesedb_record_initialize(
	     record,
	     internal_index->file_io_handle,
	     internal_index->io_handle,
	     internal_index->table_definition,
	     internal_index->template_table_definition,
	     internal_index->pages_vector,
	     internal_index->pages_cache,
	     internal_index->long_values_pages_vector,
	     internal_index->long_values_pages_cache,
	     record_data_definition,
	     internal_index->long_values_page_tree,
	     error ) != 1 )
	{
		libcerror_error_set(
		 error,
		 LIBCERROR_ERROR_DOMAIN_RUNTIME,
		 LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
		 "%s: unable to create record.",
		 function );

		goto on_error;
	}
	return( 1 );

on_error:
	if( record_data_definition != NULL )
	{
		libesedb_data_definition_free(
		 &record_data_definition,
		 NULL );
	}
	if( index_data_definition != NULL )
	{
		libesedb_data_definition_free(
		 &index_data_definition,
		 NULL );
	}
	if( key != NULL )
	{
		libesedb_page_tree_key_free(
		 &key,
		 NULL );
	}
	return( -1 );
}