#include "clar_libgit2.h"
#include "refs.h"
#include "repo/repo_helpers.h"

static git_repository *repo;
static git_reference *branch;

void test_refs_branches_ishead__initialize(void)
{
	cl_git_pass(git_repository_open(&repo, cl_fixture("testrepo.git")));
}

void test_refs_branches_ishead__cleanup(void)
{
	git_reference_free(branch);
	branch = NULL;

	git_repository_free(repo);
	repo = NULL;
}

void test_refs_branches_ishead__can_tell_if_a_branch_is_pointed_at_by_HEAD(void)
{
	cl_git_pass(git_reference_lookup(&branch, repo, "refs/heads/master"));

	cl_assert_equal_i(true, git_branch_is_head(branch));
}

void test_refs_branches_ishead__can_properly_handle_unborn_HEAD(void)
{
	git_repository_free(repo);

	repo = cl_git_sandbox_init("testrepo.git");

	make_head_unborn(repo, NON_EXISTING_HEAD);

	cl_git_pass(git_reference_lookup(&branch, repo, "refs/heads/master"));

	cl_assert_equal_i(false, git_branch_is_head(branch));

	cl_git_sandbox_cleanup();
	repo = NULL;
}

void test_refs_branches_ishead__can_properly_handle_missing_HEAD(void)
{
	git_repository_free(repo);

	repo = cl_git_sandbox_init("testrepo.git");

	delete_head(repo);

	cl_git_pass(git_reference_lookup(&branch, repo, "refs/heads/master"));

	cl_assert_equal_i(false, git_branch_is_head(branch));

	cl_git_sandbox_cleanup();
	repo = NULL;
}

void test_refs_branches_ishead__can_tell_if_a_branch_is_not_pointed_at_by_HEAD(void)
{
	cl_git_pass(git_reference_lookup(&branch, repo, "refs/heads/br2"));

	cl_assert_equal_i(false, git_branch_is_head(branch));
}

void test_refs_branches_ishead__wont_be_fooled_by_a_non_branch(void)
{
	cl_git_pass(git_reference_lookup(&branch, repo, "refs/tags/e90810b"));

	cl_assert_equal_i(false, git_branch_is_head(branch));
}

/*
 * $ git init .
 * Initialized empty Git repository in d:/temp/tempee/.git/
 * 
 * $ touch a && git add a
 * $ git commit -m" boom"
 * [master (root-commit) b47b758]  boom
 *  0 files changed
 *  create mode 100644 a
 * 
 * $ echo "ref: refs/heads/master" > .git/refs/heads/linked
 * $ echo "ref: refs/heads/linked" > .git/refs/heads/super
 * $ echo "ref: refs/heads/super" > .git/HEAD
 * 
 * $ git branch
 *   linked -> master
 * * master
 *   super -> master
 */
void test_refs_branches_ishead__only_direct_references_are_considered(void)
{
	git_reference *linked, *super, *head;

	git_repository_free(repo);
	repo = cl_git_sandbox_init("testrepo.git");

	cl_git_pass(git_reference_symbolic_create(&linked, repo, "refs/heads/linked", "refs/heads/master", 0));
	cl_git_pass(git_reference_symbolic_create(&super, repo, "refs/heads/super", "refs/heads/linked", 0));
	cl_git_pass(git_reference_symbolic_create(&head, repo, GIT_HEAD_FILE, "refs/heads/super", 1));

	cl_assert_equal_i(false, git_branch_is_head(linked));
	cl_assert_equal_i(false, git_branch_is_head(super));

	cl_git_pass(git_repository_head(&branch, repo));
	cl_assert_equal_s("refs/heads/master", git_reference_name(branch));

	git_reference_free(linked);
	git_reference_free(super);
	git_reference_free(head);
	cl_git_sandbox_cleanup();
	repo = NULL;
}
