#include "test_lib.h"
#include <git/odb.h>
#include "fileops.h"

static char *odb_dir = "test-objects";

typedef struct object_data {
    char *id;     /* object id (sha1)                          */
    char *dir;    /* object store (fan-out) directory name     */
    char *file;   /* object store filename                     */
} object_data;

static object_data commit = {
    "3d7f8a6af076c8c3f20071a8935cdbe8228594d1",
    "test-objects/3d",
    "test-objects/3d/7f8a6af076c8c3f20071a8935cdbe8228594d1",
};

static unsigned char commit_data[] = {
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    0x32, 0x64, 0x61, 0x39, 0x30, 0x62, 0x32, 0x35,
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    0x6d, 0x70, 0x6c, 0x65, 0x2e, 0x63, 0x6f, 0x6d,
    0x3e, 0x0a,
};

static git_obj commit_obj = {
	commit_data,
	sizeof(commit_data),
	GIT_OBJ_COMMIT
};

static object_data tree = {
    "dff2da90b254e1beb889d1f1f1288be1803782df",
    "test-objects/df",
    "test-objects/df/f2da90b254e1beb889d1f1f1288be1803782df",
};

static unsigned char tree_data[] = {
    0x31, 0x30, 0x30, 0x36, 0x34, 0x34, 0x20, 0x6f,
    0x6e, 0x65, 0x00, 0x8b, 0x13, 0x78, 0x91, 0x79,
    0x1f, 0xe9, 0x69, 0x27, 0xad, 0x78, 0xe6, 0x4b,
    0x0a, 0xad, 0x7b, 0xde, 0xd0, 0x8b, 0xdc, 0x31,
    0x30, 0x30, 0x36, 0x34, 0x34, 0x20, 0x73, 0x6f,
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    0x4c, 0xfc, 0xd5, 0xf1, 0x0e, 0x55, 0x90, 0xf8,
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    0x87, 0x8a, 0xc1, 0x99, 0x4e, 0x85, 0x31, 0x30,
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    0x6f, 0x00, 0xe6, 0x9d, 0xe2, 0x9b, 0xb2, 0xd1,
    0xd6, 0x43, 0x4b, 0x8b, 0x29, 0xae, 0x77, 0x5a,
    0xd8, 0xc2, 0xe4, 0x8c, 0x53, 0x91,
};

static git_obj tree_obj = {
	tree_data,
	sizeof(tree_data),
	GIT_OBJ_TREE
};

static object_data tag = {
    "09d373e1dfdc16b129ceec6dd649739911541e05",
    "test-objects/09",
    "test-objects/09/d373e1dfdc16b129ceec6dd649739911541e05",
};

static unsigned char tag_data[] = {
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    0x20, 0x31, 0x32, 0x32, 0x37, 0x38, 0x31, 0x34,
    0x32, 0x39, 0x37, 0x20, 0x2b, 0x30, 0x30, 0x30,
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    0x69, 0x73, 0x20, 0x74, 0x68, 0x65, 0x20, 0x74,
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    0x2e, 0x30, 0x2e, 0x31, 0x0a,
};

static git_obj tag_obj = {
	tag_data,
	sizeof(tag_data),
	GIT_OBJ_TAG
};

static object_data zero = {
    "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
    "test-objects/e6",
    "test-objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391",
};

static unsigned char zero_data[] = {
    0x00  /* dummy data */
};

static git_obj zero_obj = {
	zero_data,
	0,
	GIT_OBJ_BLOB
};

static object_data one = {
    "8b137891791fe96927ad78e64b0aad7bded08bdc",
    "test-objects/8b",
    "test-objects/8b/137891791fe96927ad78e64b0aad7bded08bdc",
};

static unsigned char one_data[] = {
    0x0a,
};

static git_obj one_obj = {
	one_data,
	sizeof(one_data),
	GIT_OBJ_BLOB
};

static object_data two = {
    "78981922613b2afb6025042ff6bd878ac1994e85",
    "test-objects/78",
    "test-objects/78/981922613b2afb6025042ff6bd878ac1994e85",
};

static unsigned char two_data[] = {
    0x61, 0x0a,
};

static git_obj two_obj = {
	two_data,
	sizeof(two_data),
	GIT_OBJ_BLOB
};

static object_data some = {
    "fd8430bc864cfcd5f10e5590f8a447e01b942bfe",
    "test-objects/fd",
    "test-objects/fd/8430bc864cfcd5f10e5590f8a447e01b942bfe",
};

static unsigned char some_data[] = {
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static git_obj some_obj = {
	some_data,
	sizeof(some_data),
	GIT_OBJ_BLOB
};

static int make_odb_dir(void)
{
    if (gitfo_mkdir(odb_dir, 0755) < 0) {
        if (errno == EEXIST) {
            fprintf(stderr, "odb directory \"%s\" already exists!\n", odb_dir);
            return -1;
        }
        fprintf(stderr, "can't make odb directory \"%s\"\n", odb_dir);
        return -1;
    }

    return 0;
}

static int remove_object_files(object_data *d)
{
    if (gitfo_unlink(d->file) < 0) {
        fprintf(stderr, "can't delete object file \"%s\"\n", d->file);
        return -1;
    }
    if ((gitfo_rmdir(d->dir) < 0) && (errno != ENOTEMPTY)) {
        fprintf(stderr, "can't remove object directory \"%s\"\n", d->dir);
        return -1;
    }

    if (gitfo_rmdir(odb_dir) < 0) {
        fprintf(stderr, "can't remove odb directory \"%s\"\n", odb_dir);
        return -1;
    }

    return 0;
}

static int check_object_files(object_data *d)
{
    if (gitfo_exists(d->dir) < 0)
	    return -1;
    if (gitfo_exists(d->file) < 0)
	    return -1;
    return 0;
}

static int cmp_objects(git_obj *o1, git_obj *o2)
{
    if (o1->type != o2->type)
        return -1;
    if (o1->len != o2->len)
        return -1;
    if ((o1->len > 0) && (memcmp(o1->data, o2->data, o1->len) != 0))
        return -1;
    return 0;
}

BEGIN_TEST(write_commit)
    git_odb *db;
    git_oid id1, id2;
    git_obj obj;

    must_pass(make_odb_dir());
    must_pass(git_odb_open(&db, odb_dir));
    must_pass(git_oid_mkstr(&id1, commit.id));

    must_pass(git_odb_write(&id2, db, &commit_obj));
    must_be_true(git_oid_cmp(&id1, &id2) == 0);
    must_pass(check_object_files(&commit));

    must_pass(git_odb__read_loose(&obj, db, &id1));
    must_pass(cmp_objects(&obj, &commit_obj));

    git_obj_close(&obj);
    git_odb_close(db);
    must_pass(remove_object_files(&commit));
END_TEST

BEGIN_TEST(write_tree)
    git_odb *db;
    git_oid id1, id2;
    git_obj obj;

    must_pass(make_odb_dir());
    must_pass(git_odb_open(&db, odb_dir));
    must_pass(git_oid_mkstr(&id1, tree.id));

    must_pass(git_odb_write(&id2, db, &tree_obj));
    must_be_true(git_oid_cmp(&id1, &id2) == 0);
    must_pass(check_object_files(&tree));

    must_pass(git_odb__read_loose(&obj, db, &id1));
    must_pass(cmp_objects(&obj, &tree_obj));

    git_obj_close(&obj);
    git_odb_close(db);
    must_pass(remove_object_files(&tree));
END_TEST

BEGIN_TEST(write_tag)
    git_odb *db;
    git_oid id1, id2;
    git_obj obj;

    must_pass(make_odb_dir());
    must_pass(git_odb_open(&db, odb_dir));
    must_pass(git_oid_mkstr(&id1, tag.id));

    must_pass(git_odb_write(&id2, db, &tag_obj));
    must_be_true(git_oid_cmp(&id1, &id2) == 0);
    must_pass(check_object_files(&tag));

    must_pass(git_odb__read_loose(&obj, db, &id1));
    must_pass(cmp_objects(&obj, &tag_obj));

    git_obj_close(&obj);
    git_odb_close(db);
    must_pass(remove_object_files(&tag));
END_TEST

BEGIN_TEST(write_zero)
    git_odb *db;
    git_oid id1, id2;
    git_obj obj;

    must_pass(make_odb_dir());
    must_pass(git_odb_open(&db, odb_dir));
    must_pass(git_oid_mkstr(&id1, zero.id));

    must_pass(git_odb_write(&id2, db, &zero_obj));
    must_be_true(git_oid_cmp(&id1, &id2) == 0);
    must_pass(check_object_files(&zero));

    must_pass(git_odb__read_loose(&obj, db, &id1));
    must_pass(cmp_objects(&obj, &zero_obj));

    git_obj_close(&obj);
    git_odb_close(db);
    must_pass(remove_object_files(&zero));
END_TEST

BEGIN_TEST(write_one)
    git_odb *db;
    git_oid id1, id2;
    git_obj obj;

    must_pass(make_odb_dir());
    must_pass(git_odb_open(&db, odb_dir));
    must_pass(git_oid_mkstr(&id1, one.id));

    must_pass(git_odb_write(&id2, db, &one_obj));
    must_be_true(git_oid_cmp(&id1, &id2) == 0);
    must_pass(check_object_files(&one));

    must_pass(git_odb__read_loose(&obj, db, &id1));
    must_pass(cmp_objects(&obj, &one_obj));

    git_obj_close(&obj);
    git_odb_close(db);
    must_pass(remove_object_files(&one));
END_TEST

BEGIN_TEST(write_two)
    git_odb *db;
    git_oid id1, id2;
    git_obj obj;

    must_pass(make_odb_dir());
    must_pass(git_odb_open(&db, odb_dir));
    must_pass(git_oid_mkstr(&id1, two.id));

    must_pass(git_odb_write(&id2, db, &two_obj));
    must_be_true(git_oid_cmp(&id1, &id2) == 0);
    must_pass(check_object_files(&two));

    must_pass(git_odb__read_loose(&obj, db, &id1));
    must_pass(cmp_objects(&obj, &two_obj));

    git_obj_close(&obj);
    git_odb_close(db);
    must_pass(remove_object_files(&two));
END_TEST

BEGIN_TEST(write_some)
    git_odb *db;
    git_oid id1, id2;
    git_obj obj;

    must_pass(make_odb_dir());
    must_pass(git_odb_open(&db, odb_dir));
    must_pass(git_oid_mkstr(&id1, some.id));

    must_pass(git_odb_write(&id2, db, &some_obj));
    must_be_true(git_oid_cmp(&id1, &id2) == 0);
    must_pass(check_object_files(&some));

    must_pass(git_odb__read_loose(&obj, db, &id1));
    must_pass(cmp_objects(&obj, &some_obj));

    git_obj_close(&obj);
    git_odb_close(db);
    must_pass(remove_object_files(&some));
END_TEST