/*
 * Copyright (c) 2021 joshua stein <jcs@jcs.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef __REPO_H__
#define __REPO_H__

#include <time.h>
#include "bile.h"

#define AMEND_CREATOR		'AMND'

#define REPO_TYPE			'AMRP'

#define REPO_FILE_RTYPE		'AFIL'
#define REPO_AMENDMENT_RTYPE 'CMMT'
#define REPO_DIFF_RTYPE		'DIFF'
#define REPO_TEXT_RTYPE		'TEXT'
#define REPO_VERS_RTYPE		'RVER'

#define DIFF_FILE_TYPE		'TEXT'

#define REPO_DIFF_TOO_BIG	"\r[ Diff too large to view, %lu bytes not shown ]"

#define REPO_CUR_VERS		3

struct repo_file {
	short id;
	char sort_filename[2];
	char filename[256];
	OSType type;
	OSType creator;
	unsigned long ctime;
	unsigned long mtime;
	unsigned char flags;
#define REPO_FILE_DELETED			(1 << 0)
};

struct repo_file_attrs {
	char type[4];
	char creator[4];
	unsigned long ctime;
	unsigned long mtime;
};

struct diffed_file {
	struct repo_file *file;
	short flags;
#define DIFFED_FILE_TEXT		(1 << 0)
#define DIFFED_FILE_METADATA	(1 << 1)
};

struct repo_amendment {
	short id;
	time_t date;
	char author[32];
	short nfiles;
	short *file_ids;
	short adds;
	short subs;
	short log_len;
	Handle log;
};

struct repo {
	struct bile *bile;
	short nfiles;
	struct repo_file **files;
	short next_file_id;
	short namendments;
	struct repo_amendment **amendments;
	short next_amendment_id;
	bool unloaded_amendments;
};

struct repo *repo_open(AppFile *file);
struct repo *repo_create(void);
void repo_close(struct repo *repo);
void repo_load_amendments(struct repo *repo, bool fill_in);
struct repo_amendment *repo_parse_amendment(unsigned long id, unsigned char *data,
  size_t size);
struct repo_file * repo_parse_file(unsigned long id, unsigned char *data,
  size_t size);
struct repo_file *repo_file_with_id(struct repo *repo, short id);
void repo_show_diff_text(struct repo *repo, struct repo_amendment *amendment,
  TEHandle te);
struct repo_file *repo_add_file(struct repo *repo);
void repo_file_mark_for_deletion(struct repo *repo, struct repo_file *file);
short repo_diff_file(struct repo *repo, struct repo_file *file);
short repo_file_changed(struct repo *repo, struct repo_file *file);
short repo_checkout_file(struct repo *repo, struct repo_file *file,
  short vrefnum, Str255 filename);
void repo_export_amendment(struct repo *repo,
  struct repo_amendment *amendment, short vrefnum, Str255 filename);
void repo_amend(struct repo *repo, struct diffed_file *diffed_files,
  short nfiles, short adds, short subs, char *author, Handle log,
  short loglen, Handle diff, unsigned long difflen);
void repo_marshall_amendment(struct repo_amendment *amendment,
  char **retdata, unsigned long *retlen);
void repo_backup(struct repo *repo);

#endif