#ifndef _TEX_PARSER_H
#define _TEX_PARSER_H

#include <sys/types.h>

#include "tex_parser_table.h"
#include "tex_parser_graphics.h"

#include "zerror.h"

#define TEX_PARSER_DOMAIN 0

/**
 * enum tex_parser_error - the LaTeX parser error code
 *
 * @TEX_PARSER_NOERROR:                 Default state indicates no error.
 * @TEX_PARSER_ERROR_UNKNOWN:
 * @TEX_PARSER_ERROR_STACK:
 * @TEX_PARSER_ERROR_PLACE_UNKNOWN:
 * @TEX_PARSER_ERROR_UNEXPECTED_SYMBOL:
 *
 * Need some description here...
 */
enum tex_parser_error {
	TEX_PARSER_NOERROR = 0,
	TEX_PARSER_ERROR_UNKNOWN,
	TEX_PARSER_ERROR_STACK,
	TEX_PARSER_ERROR_PLACE_UNKNOWN,
	TEX_PARSER_ERROR_UNEXPECTED_SYMBOL,
};

/**
 * struct tex_table_row_s - LaTeX table row
 *
 *
 */
struct tex_table_row_s {
	char **cells;
	char *after; // \hline, \cline{4-5} etc.
};

/**
 * struct tex_table_s - LaTeX table
 *
 *
 *
 */
struct tex_table_s {
	size_t document_offset; // offset (in sybmols) in the LaTeX document
	size_t document_size; // size (in symbols) in the LaTeX document
	char *id; // "Drossel1.Table1"
	char **col_props; // divided by >
	struct tex_table_row_s *head_table; // divided by &
	struct tex_table_row_s *foot_table; // divided by & and \tabularnewline
	struct tex_table_row_s *main_table; // divided by & and \tabularnewline
};

/**
 *
 *
 */
struct tex_graphics {
	void *something;
};

/**
 * enum tex_element_type - Type of LaTeX element
 *
 * TEX_ELEM_TEXT:                       Text containing non-arable code
 * TEX_ELEM_TABLE:                      LaTeX table or longtable
 * TEX_ELEM_GRAPHICS:                   LaTeX graphics (images, plots)
 *
 * Need some description here...
 */
enum tex_elem_type {
	TEX_ELEM_TEXT,
	TEX_ELEM_TABLE,
	TEX_ELEM_GRAPHICS
};

/**
 * struct tex_elem_s - Element of LaTeX code
 *
 * @type:                               LaTeX element type
 * @data:                               Element data structure
 *
 * Need some description here...
 */
struct tex_elem_s {
	enum tex_elem_type type;

	union {
		char *text;
		struct tex_table_s *table;
		struct tex_graphics_s *graphics;
	} data;
};

/**
 * struct tex_struct_s - LaTeX code structure
 *
 * @elems:                              List of LaTeX elements
 *
 * Need some description here...
 */
struct tex_struct_s {
	struct tex_elem_s *elems;
};

/**
 * tex_parse() - Parse the LaTeX code
 *
 * @source:                             LaTeX code string
 * @len:                                Length of LaTeX string
 * @tex_struct:                         A return location for a #tex_struct_s
 * @error:                              A return location for a #zerror_s
 *
 * Parses LaTeX text string @source of length len to *@tex_struct.
 * If some error occurs, parser returns immediatly with error info in *@error.
 * @tex_struct or @error can't be %NULL,
 */
void tex_parse(const char *source, size_t len, struct tex_struct_s **tex_struct, struct zerror_s **error);

#endif