#include "clar_libgit2.h"

#include "posix.h"

static git_repository *repo;

void test_object_commit_commitstagedfile__initialize(void)

{

	cl_fixture("treebuilder");

	cl_git_pass(git_repository_init(&repo, "treebuilder/", 0));

	cl_assert(repo != NULL);

}

void test_object_commit_commitstagedfile__cleanup(void)

{

	git_repository_free(repo);

	repo = NULL;

	cl_fixture_cleanup("treebuilder");

}

void test_object_commit_commitstagedfile__generate_predictable_object_ids(void)

{

	git_index *index;

	const git_index_entry *entry;

	git_oid expected_blob_oid, tree_oid, expected_tree_oid, commit_oid, expected_commit_oid;

	git_signature *signature;

	git_tree *tree;

	git_buf buffer;

	/*

	 * The test below replicates the following git scenario

	 *

	 * $ echo "test" > test.txt

	 * $ git hash-object test.txt

	 * 9daeafb9864cf43055ae93beb0afd6c7d144bfa4

	 *

	 * $ git add .

	 * $ git commit -m "Initial commit"

	 *

	 * $ git log

	 * commit 1fe3126578fc4eca68c193e4a3a0a14a0704624d

	 * Author: nulltoken <emeric.fermas@gmail.com>

	 * Date:   Wed Dec 14 08:29:03 2011 +0100

	 *

	 *     Initial commit

	 *

	 * $ git show 1fe3 --format=raw

	 * commit 1fe3126578fc4eca68c193e4a3a0a14a0704624d

	 * tree 2b297e643c551e76cfa1f93810c50811382f9117

	 * author nulltoken <emeric.fermas@gmail.com> 1323847743 +0100

	 * committer nulltoken <emeric.fermas@gmail.com> 1323847743 +0100

	 * 

	 *     Initial commit

	 * 

	 * diff --git a/test.txt b/test.txt

	 * new file mode 100644

	 * index 0000000..9daeafb

	 * --- /dev/null

	 * +++ b/test.txt

	 * @@ -0,0 +1 @@

	 * +test

	 *

	 * $ git ls-tree 2b297

	 * 100644 blob 9daeafb9864cf43055ae93beb0afd6c7d144bfa4    test.txt

	 */

	cl_git_pass(git_oid_fromstr(&expected_commit_oid, "1fe3126578fc4eca68c193e4a3a0a14a0704624d"));

	cl_git_pass(git_oid_fromstr(&expected_tree_oid, "2b297e643c551e76cfa1f93810c50811382f9117"));

	cl_git_pass(git_oid_fromstr(&expected_blob_oid, "9daeafb9864cf43055ae93beb0afd6c7d144bfa4"));

	/*

	 * Add a new file to the index

	 */

	cl_git_mkfile("treebuilder/test.txt", "test\n");

	cl_git_pass(git_repository_index(&index, repo));

	cl_git_pass(git_index_add_bypath(index, "test.txt"));

	entry = git_index_get_byindex(index, 0);

	cl_assert(git_oid_cmp(&expected_blob_oid, &entry->id) == 0);

	/*

	 * Information about index entry should match test file

	 */

	{

		struct stat st;

		cl_must_pass(p_lstat("treebuilder/test.txt", &st);;

		cl_assert(entry->file_size == st.st_size);

#ifndef _WIN32

		/*

		 * Windows doesn't populate these fields, and the signage is

		 * wrong in the Windows version of the struct, so lets avoid

		 * the "comparing signed and unsigned" compilation warning in

		 * that case.

		 */

		cl_assert(entry->uid == st.st_uid);

		cl_assert(entry->gid == st.st_gid);

#endif

	}

	/*

	 * Build the tree from the index

	 */

	cl_git_pass(git_index_write_tree(&tree_oid, index));

	cl_assert(git_oid_cmp(&expected_tree_oid, &tree_oid) == 0);

	/*

	 * Commit the staged file

	 */

	cl_git_pass(git_signature_new(&signature, "nulltoken", "emeric.fermas@gmail.com", 1323847743, 60));

	cl_git_pass(git_tree_lookup(&tree, repo, &tree_oid));

	memset(&buffer, 0, sizeof(git_buf));

	cl_git_pass(git_message_prettify(&buffer, "Initial commit", 0, '#'));

	cl_git_pass(git_commit_create_v(

		&commit_oid,

		repo,

		"HEAD",

		signature,

		signature,

		NULL,

		buffer.ptr,

		tree,

		0));

	cl_assert(git_oid_cmp(&expected_commit_oid, &commit_oid) == 0);

	git_buf_free(&buffer);

	git_signature_free(signature);

	git_tree_free(tree);

	git_index_free(index);

}

static void assert_commit_tree_has_n_entries(git_commit *c, int count)

{

	git_tree *tree;

	cl_git_pass(git_commit_tree(&tree, c));

	cl_assert_equal_i(count, git_tree_entrycount(tree));

	git_tree_free(tree);

}

static void assert_commit_is_head_(git_commit *c, const char *file, int line)

{

	git_commit *head;

	cl_git_pass(git_revparse_single((git_object **)&head, repo, "HEAD"));

	clar__assert(git_oid_equal(git_commit_id(c), git_commit_id(head)), file, line, "Commit is not the HEAD", NULL, 1);

	git_commit_free(head);

}

#define assert_commit_is_head(C) assert_commit_is_head_((C),__FILE__,__LINE__)

void test_object_commit_commitstagedfile__amend_commit(void)

{

	git_index *index;

	git_oid old_oid, new_oid, tree_oid;

	git_commit *old_commit, *new_commit;

	git_tree *tree;

	/* make a commit */

	cl_git_mkfile("treebuilder/myfile", "This is a file\n");

	cl_git_pass(git_repository_index(&index, repo));

	cl_git_pass(git_index_add_bypath(index, "myfile"));

	cl_repo_commit_from_index(&old_oid, repo, NULL, 0, "first commit");

	cl_git_pass(git_commit_lookup(&old_commit, repo, &old_oid));

	cl_assert_equal_i(0, git_commit_parentcount(old_commit));

	assert_commit_tree_has_n_entries(old_commit, 1);

	assert_commit_is_head(old_commit);

	/* let's amend the message of the HEAD commit */

	cl_git_pass(git_commit_amend(

		&new_oid, old_commit, "HEAD", NULL, NULL, NULL, "Initial commit", NULL));

	/* fail because the commit isn't the tip of the branch anymore */

	cl_git_fail(git_commit_amend(

		&new_oid, old_commit, "HEAD", NULL, NULL, NULL, "Initial commit", NULL));

	cl_git_pass(git_commit_lookup(&new_commit, repo, &new_oid));

	cl_assert_equal_i(0, git_commit_parentcount(new_commit));

	assert_commit_tree_has_n_entries(new_commit, 1);

	assert_commit_is_head(new_commit);

	git_commit_free(old_commit);

	old_commit = new_commit;

	/* let's amend the tree of that last commit */

	cl_git_mkfile("treebuilder/anotherfile", "This is another file\n");

	cl_git_pass(git_index_add_bypath(index, "anotherfile"));

	cl_git_pass(git_index_write_tree(&tree_oid, index));

	cl_git_pass(git_tree_lookup(&tree, repo, &tree_oid));

	cl_assert_equal_i(2, git_tree_entrycount(tree));

	/* fail to amend on a ref which does not exist */

	cl_git_fail_with(GIT_ENOTFOUND, git_commit_amend(

		&new_oid, old_commit, "refs/heads/nope", NULL, NULL, NULL, "Initial commit", tree));

	cl_git_pass(git_commit_amend(

		&new_oid, old_commit, "HEAD", NULL, NULL, NULL, "Initial commit", tree));

	git_tree_free(tree);

	cl_git_pass(git_commit_lookup(&new_commit, repo, &new_oid));

	cl_assert_equal_i(0, git_commit_parentcount(new_commit));

	assert_commit_tree_has_n_entries(new_commit, 2);

	assert_commit_is_head(new_commit);

	/* cleanup */

	git_commit_free(old_commit);

	git_commit_free(new_commit);

	git_index_free(index);

}