#pragma once

#include "allocator.h"

#include <wchar.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <wctype.h>

enum {
	TABULAR_ALIGN_LEFT,
	TABULAR_ALIGN_CENTER,
	TABULAR_ALIGN_RIGHT
};

enum {
	TABULAR_TRUNC,
	TABULAR_WRAP,
	TABULAR_WRAP_WORDAWARE
};

enum {
	TABULAR_ENTRY_HIDDEN,
	TABULAR_ENTRY_STR_SET,
	TABULAR_ENTRY_HIDDEN_SET,
};

struct tabular_user {
	union {
		void *ptr;
		size_t id;
	};
};

struct tabular_entry {
	char *str;
	uint32_t flags;
	uint32_t ulen;
};

struct tabular_row {
	struct tabular_user user;
	struct tabular_entry *entries;
	struct tabular_row *next;
};

struct tabular_col {
	struct tabular_user user;

	/* column name displayed in header */
	const char *name;

	/* create str entry to display from user objects */
	char *(*to_str)(const struct tabular_user *user_row,
		const struct tabular_user *user_col);

	/* only show content if atleast one row is not 'hidden' */
	bool (*is_hidden)(const struct tabular_user *user_row,
		const struct tabular_user *user_col);

	/* size restrictions */
	size_t minwidth, maxwidth;

	/* whitespace padding */
	size_t lpad, rpad;

	/* text alignment */
	int align;

	/* content packing strategy */
	int strategy;

	/* omiting column due to col contraints disallowed */
	bool essential;

	/* reducing length due to col contraints allowed */
	bool squashable;
};

struct tabular_cfg {
	struct tabular_user user;

	const struct tabular_col *columns;
	size_t column_count;

	/* color mode: 1, 16, 256 */
	int colors;

	/* fit rows to output size */
	bool fit_rows;

	/* amount of available lines to skip */
	size_t skip_lines;

	/* output dimensions */
	size_t outw, outh;

	/* entry separators */
	const char *hsep, *vsep, *xsep;

	/* total lpad, rpad */
	size_t lpad, rpad;

	/* lazy load rows */
	struct tabular_row *(*row_gen)(const struct tabular_user *user);

	/* style printing hook for header, separators and content */
	bool (*print_style)(FILE *file, const struct tabular_cfg *cfg,
		const struct tabular_row *row, const struct tabular_col *col);

	const struct allocator *allocator;
};

struct tabular_stats {
	bool rows_truncated;
	bool cols_truncated;
	size_t rows_displayed;
	size_t lines_used;
};

int tabular_format(FILE *file, const struct tabular_cfg *cfg,
	struct tabular_stats *stat, struct tabular_row **rows);

void tabular_load_row_entry_hidden(const struct tabular_cfg *cfg,
	struct tabular_row *row, size_t col);
void tabular_load_row_entry_str(const struct tabular_cfg *cfg,
	struct tabular_row *row, size_t col);

struct tabular_row *tabular_alloc_row(const struct tabular_cfg *cfg,
	int *error, struct tabular_user user);
int tabular_free_rows(const struct tabular_cfg *cfg, struct tabular_row *rows);