/*

 * Copyright (C) the libgit2 contributors. All rights reserved.

 *

 * This file is part of libgit2, distributed under the GNU GPL v2 with

 * a Linking Exception. For full terms see the included COPYING file.

 */

#include "common.h"

#include "annotated_commit.h"

#include "refs.h"

#include "cache.h"

#include "git2/commit.h"

#include "git2/refs.h"

#include "git2/repository.h"

#include "git2/annotated_commit.h"

#include "git2/revparse.h"

#include "git2/tree.h"

#include "git2/index.h"

static int annotated_commit_init(

	git_annotated_commit **out,

	git_commit *commit,

	const char *description)

{

	git_annotated_commit *annotated_commit;

	int error = 0;

	assert(out && commit);

	*out = NULL;

	annotated_commit = git__calloc(1, sizeof(git_annotated_commit));

	GITERR_CHECK_ALLOC(annotated_commit);

	annotated_commit->type = GIT_ANNOTATED_COMMIT_REAL;

	if ((error = git_commit_dup(&annotated_commit->commit, commit)) < 0)

		goto done;

	git_oid_fmt(annotated_commit->id_str, git_commit_id(commit));

	annotated_commit->id_str[GIT_OID_HEXSZ] = '\0';

	if (!description)

		description = annotated_commit->id_str;

	annotated_commit->description = git__strdup(description);

	GITERR_CHECK_ALLOC(annotated_commit->description);

done:

	if (!error)

		*out = annotated_commit;

	return error;

}

static int annotated_commit_init_from_id(

	git_annotated_commit **out,

	git_repository *repo,

	const git_oid *id,

	const char *description)

{

	git_commit *commit = NULL;

	int error = 0;

	assert(out && repo && id);

	*out = NULL;

	if ((error = git_commit_lookup(&commit, repo, id)) < 0)

		goto done;

	error = annotated_commit_init(out, commit, description);

done:

	git_commit_free(commit);

	return error;

}

int git_annotated_commit_lookup(

	git_annotated_commit **out,

	git_repository *repo,

	const git_oid *id)

{

	return annotated_commit_init_from_id(out, repo, id, NULL);

}

int git_annotated_commit_from_commit(

	git_annotated_commit **out,

	git_commit *commit)

{

	return annotated_commit_init(out, commit, NULL);

}

int git_annotated_commit_from_revspec(

	git_annotated_commit **out,

	git_repository *repo,

	const char *revspec)

{

	git_object *obj, *commit;

	int error;

	assert(out && repo && revspec);

	if ((error = git_revparse_single(&obj, repo, revspec)) < 0)

		return error;

	if ((error = git_object_peel(&commit, obj, GIT_OBJ_COMMIT))) {

		git_object_free(obj);

		return error;

	}

	error = annotated_commit_init(out, (git_commit *)commit, revspec);

	git_object_free(obj);

	git_object_free(commit);

	return error;

}

int git_annotated_commit_from_ref(

	git_annotated_commit **out,

	git_repository *repo,

	const git_reference *ref)

{

	git_reference *resolved;

	int error = 0;

	assert(out && repo && ref);

	*out = NULL;

	if ((error = git_reference_resolve(&resolved, ref)) < 0)

		return error;

	error = annotated_commit_init_from_id(out,

		repo,

		git_reference_target(resolved),

		git_reference_name(ref));

	if (!error) {

		(*out)->ref_name = git__strdup(git_reference_name(ref));

		GITERR_CHECK_ALLOC((*out)->ref_name);

	}

	git_reference_free(resolved);

	return error;

}

int git_annotated_commit_from_head(

	git_annotated_commit **out,

	git_repository *repo)

{

	git_reference *head;

	int error;

	assert(out && repo);

	*out = NULL;

    if ((error = git_reference_lookup(&head, repo, GIT_HEAD_FILE)) < 0)

		return -1;

	error = git_annotated_commit_from_ref(out, repo, head);

	git_reference_free(head);

	return error;

}

int git_annotated_commit_from_fetchhead(

	git_annotated_commit **out,

	git_repository *repo,

	const char *branch_name,

	const char *remote_url,

	const git_oid *id)

{

	assert(repo && id && branch_name && remote_url);

	if (annotated_commit_init_from_id(out, repo, id, branch_name) < 0)

		return -1;

	(*out)->ref_name = git__strdup(branch_name);

	GITERR_CHECK_ALLOC((*out)->ref_name);

	(*out)->remote_url = git__strdup(remote_url);

	GITERR_CHECK_ALLOC((*out)->remote_url);

	return 0;

}

const git_oid *git_annotated_commit_id(

	const git_annotated_commit *annotated_commit)

{

	assert(annotated_commit);

	return git_commit_id(annotated_commit->commit);

}

void git_annotated_commit_free(git_annotated_commit *annotated_commit)

{

	if (annotated_commit == NULL)

		return;

	switch (annotated_commit->type) {

		case GIT_ANNOTATED_COMMIT_REAL:

			git_commit_free(annotated_commit->commit);

			git_tree_free(annotated_commit->tree);

			git__free((char *)annotated_commit->description);

			git__free((char *)annotated_commit->ref_name);

			git__free((char *)annotated_commit->remote_url);

			break;

		case GIT_ANNOTATED_COMMIT_VIRTUAL:

			git_index_free(annotated_commit->index);

			git_array_clear(annotated_commit->parents);

			break;

		default:

			abort();

	}

	git__free(annotated_commit);

}