/*
 * Copyright (C) 2009-2012 the libgit2 contributors
 *
 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
 */
#ifndef INCLUDE_repository_h__
#define INCLUDE_repository_h__

#include "git2/common.h"
#include "git2/oid.h"
#include "git2/odb.h"
#include "git2/repository.h"
#include "git2/object.h"

#include "index.h"
#include "cache.h"
#include "refs.h"
#include "buffer.h"
#include "odb.h"
#include "attr.h"
#include "strmap.h"

#define DOT_GIT ".git"
#define GIT_DIR DOT_GIT "/"
#define GIT_DIR_MODE 0755
#define GIT_BARE_DIR_MODE 0777

/** Cvar cache identifiers */
typedef enum {
	GIT_CVAR_AUTO_CRLF = 0, /* core.autocrlf */
	GIT_CVAR_EOL, /* core.eol */
	GIT_CVAR_CACHE_MAX
} git_cvar_cached;

/**
 * CVAR value enumerations
 *
 * These are the values that are actually stored in the cvar cache, instead
 * of their string equivalents. These values are internal and symbolic;
 * make sure that none of them is set to `-1`, since that is the unique
 * identifier for "not cached"
 */
typedef enum {
	/* The value hasn't been loaded from the cache yet */
	GIT_CVAR_NOT_CACHED = -1,

	/* core.safecrlf: false, 'fail', 'warn' */
	GIT_SAFE_CRLF_FALSE = 0,
	GIT_SAFE_CRLF_FAIL = 1,
	GIT_SAFE_CRLF_WARN = 2,

	/* core.autocrlf: false, true, 'input; */
	GIT_AUTO_CRLF_FALSE = 0,
	GIT_AUTO_CRLF_TRUE = 1,
	GIT_AUTO_CRLF_INPUT = 2,
	GIT_AUTO_CRLF_DEFAULT = GIT_AUTO_CRLF_FALSE,

	/* core.eol: unset, 'crlf', 'lf', 'native' */
	GIT_EOL_UNSET = 0,
	GIT_EOL_CRLF = 1,
	GIT_EOL_LF = 2,
#ifdef GIT_WIN32
	GIT_EOL_NATIVE = GIT_EOL_CRLF,
#else
	GIT_EOL_NATIVE = GIT_EOL_LF,
#endif
	GIT_EOL_DEFAULT = GIT_EOL_NATIVE
} git_cvar_value;

/* internal repository init flags */
enum {
	GIT_REPOSITORY_INIT__HAS_DOTGIT = (1u << 16),
	GIT_REPOSITORY_INIT__NATURAL_WD = (1u << 17),
	GIT_REPOSITORY_INIT__IS_REINIT  = (1u << 18),
};

/** Base git object for inheritance */
struct git_object {
	git_cached_obj cached;
	git_repository *repo;
	git_otype type;
};

/** Internal structure for repository object */
struct git_repository {
	git_odb *_odb;
	git_config *_config;
	git_index *_index;

	git_cache objects;
	git_refcache references;
	git_attr_cache attrcache;
	git_strmap *submodules;

	char *path_repository;
	char *workdir;

	unsigned is_bare:1;
	unsigned int lru_counter;

	git_cvar_value cvar_cache[GIT_CVAR_CACHE_MAX];
};

/* fully free the object; internal method, DO NOT EXPORT */
void git_object__free(void *object);

GIT_INLINE(int) git_object__dup(git_object **dest, git_object *source)
{
	git_cached_obj_incref(source);
	*dest = source;
	return 0;
}

int git_object__resolve_to_type(git_object **obj, git_otype type);

int git_oid__parse(git_oid *oid, const char **buffer_out, const char *buffer_end, const char *header);
void git_oid__writebuf(git_buf *buf, const char *header, const git_oid *oid);

GIT_INLINE(git_attr_cache *) git_repository_attr_cache(git_repository *repo)
{
	return &repo->attrcache;
}

int git_repository_head_tree(git_tree **tree, git_repository *repo);

/*
 * Weak pointers to repository internals.
 *
 * The returned pointers do not need to be freed. Do not keep
 * permanent references to these (i.e. between API calls), since they may
 * become invalidated if the user replaces a repository internal.
 */
int git_repository_config__weakptr(git_config **out, git_repository *repo);
int git_repository_odb__weakptr(git_odb **out, git_repository *repo);
int git_repository_index__weakptr(git_index **out, git_repository *repo);

/*
 * CVAR cache 
 *
 * Efficient access to the most used config variables of a repository.
 * The cache is cleared everytime the config backend is replaced.
 */
int git_repository__cvar(int *out, git_repository *repo, git_cvar_cached cvar);
void git_repository__cvar_cache_clear(git_repository *repo);

/*
 * Submodule cache
 */
extern void git_submodule_config_free(git_repository *repo);

#endif
