#include "clar_libgit2.h"
#include "apply_helpers.h"

static git_repository *repo;

#define TEST_REPO_PATH "merge-recursive"

void test_apply_check__initialize(void)
{
	git_oid oid;
	git_commit *commit;

	repo = cl_git_sandbox_init(TEST_REPO_PATH);

	git_oid_fromstr(&oid, "539bd011c4822c560c1d17cab095006b7a10f707");
	cl_git_pass(git_commit_lookup(&commit, repo, &oid));
	cl_git_pass(git_reset(repo, (git_object *)commit, GIT_RESET_HARD, NULL));
	git_commit_free(commit);
}

void test_apply_check__cleanup(void)
{
	cl_git_sandbox_cleanup();
}

void test_apply_check__generate_diff(void)
{
	git_oid a_oid, b_oid;
	git_commit *a_commit, *b_commit;
	git_tree *a_tree, *b_tree;
	git_diff *diff;
	git_diff_options diff_opts = GIT_DIFF_OPTIONS_INIT;
	git_apply_options opts = GIT_APPLY_OPTIONS_INIT;

	cl_git_pass(git_oid_fromstr(&a_oid, "539bd011c4822c560c1d17cab095006b7a10f707"));
	cl_git_pass(git_oid_fromstr(&b_oid, "7c7bf85e978f1d18c0566f702d2cb7766b9c8d4f"));
	cl_git_pass(git_commit_lookup(&a_commit, repo, &a_oid));
	cl_git_pass(git_commit_lookup(&b_commit, repo, &b_oid));

	cl_git_pass(git_commit_tree(&a_tree, a_commit));
	cl_git_pass(git_commit_tree(&b_tree, b_commit));

	opts.flags |= GIT_APPLY_CHECK;
	cl_git_pass(git_diff_tree_to_tree(&diff, repo, a_tree, b_tree, &diff_opts));
	cl_git_pass(git_apply(repo, diff, GIT_APPLY_LOCATION_BOTH, &opts));

	validate_index_unchanged(repo);
	validate_workdir_unchanged(repo);

	git_diff_free(diff);
	git_tree_free(a_tree);
	git_tree_free(b_tree);
	git_commit_free(a_commit);
	git_commit_free(b_commit);
}

void test_apply_check__parsed_diff(void)
{
	git_diff *diff;
	git_apply_options opts = GIT_APPLY_OPTIONS_INIT;

	opts.flags |= GIT_APPLY_CHECK;
	cl_git_pass(git_diff_from_buffer(&diff,
		DIFF_MODIFY_TWO_FILES, strlen(DIFF_MODIFY_TWO_FILES)));
	cl_git_pass(git_apply(repo, diff, GIT_APPLY_LOCATION_INDEX, &opts));

	validate_index_unchanged(repo);
	validate_workdir_unchanged(repo);

	git_diff_free(diff);
}

void test_apply_check__binary(void)
{
   git_diff *diff;
   git_apply_options opts = GIT_APPLY_OPTIONS_INIT;

   opts.flags |= GIT_APPLY_CHECK;
   cl_git_pass(git_diff_from_buffer(&diff,
       DIFF_MODIFY_TWO_FILES_BINARY,
       strlen(DIFF_MODIFY_TWO_FILES_BINARY)));
   cl_git_pass(git_apply(repo, diff, GIT_APPLY_LOCATION_INDEX, &opts));

   validate_index_unchanged(repo);
   validate_workdir_unchanged(repo);

   git_diff_free(diff);
}

void test_apply_check__does_not_apply(void)
{
	git_diff *diff;
	git_index *index;
	git_apply_options opts = GIT_APPLY_OPTIONS_INIT;

	const char *diff_file = DIFF_MODIFY_TWO_FILES;

	struct merge_index_entry index_expected[] = {
		{ 0100644, "f51658077d85f2264fa179b4d0848268cb3475c3", 0, "asparagus.txt" },
		{ 0100644, "68f6182f4c85d39e1309d97c7e456156dc9c0096", 0, "beef.txt" },
		{ 0100644, "4b7c5650008b2e747fe1809eeb5a1dde0e80850a", 0, "bouilli.txt" },
		{ 0100644, "c4e6cca3ec6ae0148ed231f97257df8c311e015f", 0, "gravy.txt" },
		{ 0100644, "68af1fc7407fd9addf1701a87eb1c95c7494c598", 0, "oyster.txt" },
	};
	size_t index_expected_cnt = sizeof(index_expected) /
		sizeof(struct merge_index_entry);

	/* mutate the index */
	cl_git_pass(git_repository_index(&index, repo));
	cl_git_pass(git_index_remove(index, "veal.txt", 0));
	cl_git_pass(git_index_write(index));
	git_index_free(index);

	opts.flags |= GIT_APPLY_CHECK;
	cl_git_pass(git_diff_from_buffer(&diff, diff_file, strlen(diff_file)));
	cl_git_fail_with(GIT_EAPPLYFAIL, git_apply(repo, diff, GIT_APPLY_LOCATION_INDEX, &opts));

	validate_apply_index(repo, index_expected, index_expected_cnt);

	git_diff_free(diff);
}
