#include "clar_libgit2.h"
#include "refs.h"
#include "repo/repo_helpers.h"
#include "config/config_helpers.h"
#include "futils.h"
#include "reflog.h"

static git_repository *repo;
static git_reference *fake_remote;

void test_refs_branches_delete__initialize(void)
{
	git_oid id;

	repo = cl_git_sandbox_init("testrepo.git");

	cl_git_pass(git_oid_fromstr(&id, "be3563ae3f795b2b4353bcce3a527ad0a4f7f644"));
	cl_git_pass(git_reference_create(&fake_remote, repo, "refs/remotes/nulltoken/master", &id, 0, NULL));
}

void test_refs_branches_delete__cleanup(void)
{
	git_reference_free(fake_remote);
	fake_remote = NULL;

	cl_git_sandbox_cleanup();
	repo = NULL;
}

void test_refs_branches_delete__can_not_delete_a_branch_pointed_at_by_HEAD(void)
{
	git_reference *head;
	git_reference *branch;

	/* Ensure HEAD targets the local master branch */
	cl_git_pass(git_reference_lookup(&head, repo, GIT_HEAD_FILE));
	cl_assert_equal_s("refs/heads/master", git_reference_symbolic_target(head));
	git_reference_free(head);

	cl_git_pass(git_branch_lookup(&branch, repo, "master", GIT_BRANCH_LOCAL));
	cl_git_fail(git_branch_delete(branch));
	git_reference_free(branch);
}

void test_refs_branches_delete__can_delete_a_branch_even_if_HEAD_is_missing(void)
{
	git_reference *head;
	git_reference *branch;

	cl_git_pass(git_reference_lookup(&head, repo, GIT_HEAD_FILE));
	git_reference_delete(head);
	git_reference_free(head);

	cl_git_pass(git_branch_lookup(&branch, repo, "br2", GIT_BRANCH_LOCAL));
	cl_git_pass(git_branch_delete(branch));
	git_reference_free(branch);
}

void test_refs_branches_delete__can_delete_a_branch_when_HEAD_is_unborn(void)
{
	git_reference *branch;

	make_head_unborn(repo, NON_EXISTING_HEAD);

	cl_git_pass(git_branch_lookup(&branch, repo, "br2", GIT_BRANCH_LOCAL));
	cl_git_pass(git_branch_delete(branch));
	git_reference_free(branch);
}

void test_refs_branches_delete__can_delete_a_branch_pointed_at_by_detached_HEAD(void)
{
	git_reference *head, *branch;

	cl_git_pass(git_reference_lookup(&head, repo, GIT_HEAD_FILE));
	cl_assert_equal_i(GIT_REFERENCE_SYMBOLIC, git_reference_type(head));
	cl_assert_equal_s("refs/heads/master", git_reference_symbolic_target(head));
	git_reference_free(head);

	/* Detach HEAD and make it target the commit that "master" points to */
	git_repository_detach_head(repo);

	cl_git_pass(git_branch_lookup(&branch, repo, "master", GIT_BRANCH_LOCAL));
	cl_git_pass(git_branch_delete(branch));
	git_reference_free(branch);
}

void test_refs_branches_delete__can_delete_a_local_branch(void)
{
	git_reference *branch;
	cl_git_pass(git_branch_lookup(&branch, repo, "br2", GIT_BRANCH_LOCAL));
	cl_git_pass(git_branch_delete(branch));
	git_reference_free(branch);
}

void test_refs_branches_delete__can_delete_a_remote_branch(void)
{
	git_reference *branch;
	cl_git_pass(git_branch_lookup(&branch, repo, "nulltoken/master", GIT_BRANCH_REMOTE));
	cl_git_pass(git_branch_delete(branch));
	git_reference_free(branch);
}

void test_refs_branches_delete__deleting_a_branch_removes_related_configuration_data(void)
{
	git_reference *branch;

	assert_config_entry_existence(repo, "branch.track-local.remote", true);
	assert_config_entry_existence(repo, "branch.track-local.merge", true);

	cl_git_pass(git_branch_lookup(&branch, repo, "track-local", GIT_BRANCH_LOCAL));
	cl_git_pass(git_branch_delete(branch));
	git_reference_free(branch);

	assert_config_entry_existence(repo, "branch.track-local.remote", false);
	assert_config_entry_existence(repo, "branch.track-local.merge", false);
}

void test_refs_branches_delete__removes_reflog(void)
{
	git_reference *branch;
	git_reflog *log;
	git_oid oidzero = {{0}};
	git_signature *sig;

	/* Ensure the reflog has at least one entry */
	cl_git_pass(git_signature_now(&sig, "Me", "user@example.com"));
	cl_git_pass(git_reflog_read(&log, repo, "refs/heads/track-local"));
	cl_git_pass(git_reflog_append(log, &oidzero, sig, "message"));
	cl_assert(git_reflog_entrycount(log) > 0);
	git_signature_free(sig);
	git_reflog_free(log);

	cl_git_pass(git_branch_lookup(&branch, repo, "track-local", GIT_BRANCH_LOCAL));
	cl_git_pass(git_branch_delete(branch));
	git_reference_free(branch);

	cl_assert_equal_i(false, git_reference_has_log(repo, "refs/heads/track-local"));

	/* Reading a non-existent reflog creates it, but it should be empty */
	cl_git_pass(git_reflog_read(&log, repo, "refs/heads/track-local"));
	cl_assert_equal_i(0, git_reflog_entrycount(log));
	git_reflog_free(log);
}

void test_refs_branches_delete__removes_empty_folders(void)
{
	const char *commondir = git_repository_commondir(repo);
	git_oid commit_id;
	git_commit *commit;
	git_reference *branch;

	git_reflog *log;
	git_oid oidzero = {{0}};
	git_signature *sig;

	git_str ref_folder = GIT_STR_INIT;
	git_str reflog_folder = GIT_STR_INIT;

	/* Create a new branch with a nested name */
	cl_git_pass(git_oid_fromstr(&commit_id, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750"));
	cl_git_pass(git_commit_lookup(&commit, repo, &commit_id));
	cl_git_pass(git_branch_create(&branch, repo, "some/deep/ref", commit, 0));
	git_commit_free(commit);

	/* Ensure the reflog has at least one entry */
	cl_git_pass(git_signature_now(&sig, "Me", "user@example.com"));
	cl_git_pass(git_reflog_read(&log, repo, "refs/heads/some/deep/ref"));
	cl_git_pass(git_reflog_append(log, &oidzero, sig, "message"));
	cl_assert(git_reflog_entrycount(log) > 0);
	git_signature_free(sig);
	git_reflog_free(log);

	cl_git_pass(git_str_joinpath(&ref_folder, commondir, "refs/heads/some/deep"));
	cl_git_pass(git_str_join3(&reflog_folder, '/', commondir, GIT_REFLOG_DIR, "refs/heads/some/deep"));

	cl_assert(git_fs_path_exists(git_str_cstr(&ref_folder)) == true);
	cl_assert(git_fs_path_exists(git_str_cstr(&reflog_folder)) == true);

	cl_git_pass(git_branch_delete(branch));

	cl_assert(git_fs_path_exists(git_str_cstr(&ref_folder)) == false);
	cl_assert(git_fs_path_exists(git_str_cstr(&reflog_folder)) == false);

	git_reference_free(branch);
	git_str_dispose(&ref_folder);
	git_str_dispose(&reflog_folder);
}

