#include "clar_libgit2.h"
#include "odb.h"
#include "git2/odb_backend.h"
#include "posix.h"
#include "loose_data.h"
#include "repository.h"

#ifdef __ANDROID_API__
# define S_IREAD        S_IRUSR
# define S_IWRITE       S_IWUSR
#endif

static void write_object_files(object_data *d)
{
	int fd;

	if (p_mkdir(d->dir, GIT_OBJECT_DIR_MODE) < 0)
		cl_assert(errno == EEXIST);

	cl_assert((fd = p_creat(d->file, S_IREAD | S_IWRITE)) >= 0);
	cl_must_pass(p_write(fd, d->bytes, d->blen));

	p_close(fd);
}

static void cmp_objects(git_rawobj *o, object_data *d)
{
	cl_assert(o->type == git_object_string2type(d->type));
	cl_assert(o->len == d->dlen);

	if (o->len > 0)
		cl_assert(memcmp(o->data, d->data, o->len) == 0);
}

static void test_read_object(object_data *data)
{
    git_oid id;
    git_odb_object *obj;
	git_odb *odb;
	git_rawobj tmp;

    write_object_files(data);

    cl_git_pass(git_odb_open(&odb, "test-objects"));
    cl_git_pass(git_oid_fromstr(&id, data->id));
    cl_git_pass(git_odb_read(&obj, odb, &id));

	tmp.data = obj->buffer;
	tmp.len = obj->cached.size;
	tmp.type = obj->cached.type;

    cmp_objects(&tmp, data);

    git_odb_object_free(obj);
	git_odb_free(odb);
}

void test_odb_loose__initialize(void)
{
	p_fsync__cnt = 0;
	cl_must_pass(p_mkdir("test-objects", GIT_OBJECT_DIR_MODE));
}

void test_odb_loose__cleanup(void)
{
	cl_git_pass(git_libgit2_opts(GIT_OPT_ENABLE_FSYNC_GITDIR, 0));
	cl_fixture_cleanup("test-objects");
}

void test_odb_loose__exists(void)
{
	git_oid id, id2;
	git_odb *odb;

	write_object_files(&one);
	cl_git_pass(git_odb_open(&odb, "test-objects"));

	cl_git_pass(git_oid_fromstr(&id, one.id));
	cl_assert(git_odb_exists(odb, &id));

	cl_git_pass(git_oid_fromstrp(&id, "8b137891"));
	cl_git_pass(git_odb_exists_prefix(&id2, odb, &id, 8));
	cl_assert_equal_i(0, git_oid_streq(&id2, one.id));

	/* Test for a missing object */
	cl_git_pass(git_oid_fromstr(&id, "8b137891791fe96927ad78e64b0aad7bded08baa"));
	cl_assert(!git_odb_exists(odb, &id));

	cl_git_pass(git_oid_fromstrp(&id, "8b13789a"));
	cl_assert_equal_i(GIT_ENOTFOUND, git_odb_exists_prefix(&id2, odb, &id, 8));

	git_odb_free(odb);
}

void test_odb_loose__simple_reads(void)
{
	test_read_object(&commit);
	test_read_object(&tree);
	test_read_object(&tag);
	test_read_object(&zero);
	test_read_object(&one);
	test_read_object(&two);
	test_read_object(&some);
}

void test_write_object_permission(
	mode_t dir_mode, mode_t file_mode,
	mode_t expected_dir_mode, mode_t expected_file_mode)
{
	git_odb *odb;
	git_odb_backend *backend;
	git_oid oid;
	struct stat statbuf;
	mode_t mask, os_mask;

	/* Windows does not return group/user bits from stat,
	* files are never executable.
	*/
#ifdef GIT_WIN32
	os_mask = 0600;
#else
	os_mask = 0777;
#endif

	mask = p_umask(0);
	p_umask(mask);

	cl_git_pass(git_odb_new(&odb));
	cl_git_pass(git_odb_backend_loose(&backend, "test-objects", -1, 0, dir_mode, file_mode));
	cl_git_pass(git_odb_add_backend(odb, backend, 1));
	cl_git_pass(git_odb_write(&oid, odb, "Test data\n", 10, GIT_OBJ_BLOB));

	cl_git_pass(p_stat("test-objects/67", &statbuf));
	cl_assert_equal_i(statbuf.st_mode & os_mask, (expected_dir_mode & ~mask) & os_mask);

	cl_git_pass(p_stat("test-objects/67/b808feb36201507a77f85e6d898f0a2836e4a5", &statbuf));
	cl_assert_equal_i(statbuf.st_mode & os_mask, (expected_file_mode & ~mask) & os_mask);

	git_odb_free(odb);
}

void test_odb_loose__permissions_standard(void)
{
	test_write_object_permission(0, 0, GIT_OBJECT_DIR_MODE, GIT_OBJECT_FILE_MODE);
}

void test_odb_loose_permissions_readonly(void)
{
	test_write_object_permission(0777, 0444, 0777, 0444);
}

void test_odb_loose__permissions_readwrite(void)
{
	test_write_object_permission(0777, 0666, 0777, 0666);
}

static void write_object_to_loose_odb(int fsync)
{
	git_odb *odb;
	git_odb_backend *backend;
	git_oid oid;

	cl_git_pass(git_odb_new(&odb));
	cl_git_pass(git_odb_backend_loose(&backend, "test-objects", -1, fsync, 0777, 0666));
	cl_git_pass(git_odb_add_backend(odb, backend, 1));
	cl_git_pass(git_odb_write(&oid, odb, "Test data\n", 10, GIT_OBJ_BLOB));
	git_odb_free(odb);
}

void test_odb_loose__does_not_fsync_by_default(void)
{
	write_object_to_loose_odb(0);
	cl_assert_equal_sz(0, p_fsync__cnt);
}

void test_odb_loose__fsync_obeys_odb_option(void)
{
	write_object_to_loose_odb(1);
	cl_assert(p_fsync__cnt > 0);
}

void test_odb_loose__fsync_obeys_global_setting(void)
{
	cl_git_pass(git_libgit2_opts(GIT_OPT_ENABLE_FSYNC_GITDIR, 1));
	write_object_to_loose_odb(0);
	cl_assert(p_fsync__cnt > 0);
}

void test_odb_loose__fsync_obeys_repo_setting(void)
{
	git_repository *repo;
	git_odb *odb;
	git_oid oid;

	cl_git_pass(git_repository_init(&repo, "test-objects", 1));
	cl_git_pass(git_repository_odb__weakptr(&odb, repo));
	cl_git_pass(git_odb_write(&oid, odb, "No fsync here\n", 14, GIT_OBJ_BLOB));
	cl_assert(p_fsync__cnt == 0);
	git_repository_free(repo);

	cl_git_pass(git_repository_open(&repo, "test-objects"));
	cl_repo_set_bool(repo, "core.fsyncObjectFiles", true);
	cl_git_pass(git_repository_odb__weakptr(&odb, repo));
	cl_git_pass(git_odb_write(&oid, odb, "Now fsync\n", 10, GIT_OBJ_BLOB));
	cl_assert(p_fsync__cnt > 0);
	git_repository_free(repo);
}