#include "clar_libgit2.h"

#include "git2/checkout.h"
#include "path.h"

#ifdef GIT_WIN32
# include <Windows.h>
#endif

static git_repository *repo;
static git_object *obj;
static git_checkout_options checkout_opts;

void test_checkout_icase__initialize(void)
{
	git_oid id;

	repo = cl_git_sandbox_init("testrepo");

	cl_git_pass(git_reference_name_to_id(&id, repo, "refs/heads/dir"));
	cl_git_pass(git_object_lookup(&obj, repo, &id, GIT_OBJ_ANY));

	git_checkout_init_options(&checkout_opts, GIT_CHECKOUT_OPTIONS_VERSION);
	checkout_opts.checkout_strategy = GIT_CHECKOUT_FORCE;
}

void test_checkout_icase__cleanup(void)
{
	git_object_free(obj);
	cl_git_sandbox_cleanup();
}

static char *p_realpath(const char *in)
{
#ifdef GIT_WIN32
	/*

	HANDLE fh, mh;
	HINSTANCE psapi;
	BY_HANDLE_FILE_INFORMATION fi;
	void *map;
	char *filename;
	size_t filename_len = 1024;

	typedef DWORD (__stdcall *getmappedfilename)(HANDLE, LPVOID, LPTSTR, DWORD);
	getmappedfilename getfunc;

	cl_assert(filename = malloc(filename_len));

	cl_win32_pass(psapi = LoadLibrary("psapi.dll"));
	cl_win32_pass(getfunc = (getmappedfilename)GetProcAddress(psapi, "GetMappedFileNameA"));

	cl_win32_pass(fh = CreateFileA(in, GENERIC_READ, FILE_SHARE_READ,
		NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL));
	cl_win32_pass(mh = CreateFileMapping(fh, NULL, PAGE_READONLY, 0, 1, NULL));

	cl_win32_pass(map = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, 1));

	cl_win32_pass(getfunc(GetCurrentProcess(), map, filename, filename_len));

	UnmapViewOfFile(map);
	CloseHandle(mh);
	CloseHandle(fh);
*/

	HANDLE fh;
	HINSTANCE kerneldll;
	char *filename;

	typedef DWORD (__stdcall *getfinalpathname)(HANDLE, LPSTR, DWORD, DWORD);
	getfinalpathname getfinalpathfn;

	cl_assert(filename = malloc(MAX_PATH));
	cl_win32_pass(kerneldll = LoadLibrary("kernel32.dll"));
	cl_win32_pass(getfinalpathfn = (getfinalpathname)GetProcAddress(kerneldll, "GetFinalPathNameByHandleA"));

	cl_win32_pass(fh = CreateFileA(in, FILE_READ_ATTRIBUTES | STANDARD_RIGHTS_READ, FILE_SHARE_READ,
		NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL));

	cl_win32_pass(getfinalpathfn(fh, filename, MAX_PATH, VOLUME_NAME_DOS));

	CloseHandle(fh);

	git_path_mkposix(filename);

	return filename;
#else
	return realpath(in, NULL);
#endif
}

static void assert_name_is(const char *expected)
{
	char *actual;
	size_t actual_len, expected_len, start;

	cl_assert(actual = p_realpath(expected));

	expected_len = strlen(expected);
	actual_len = strlen(actual);
	cl_assert(actual_len >= expected_len);

	start = actual_len - expected_len;
	cl_assert_equal_s(expected, actual + start);

	if (start)
		cl_assert_equal_strn("/", actual + (start - 1), 1);

	free(actual);
}

void test_checkout_icase__overwrites_files_for_files(void)
{
	cl_git_write2file("testrepo/NEW.txt", "neue file\n", 10, \
		O_WRONLY | O_CREAT | O_TRUNC, 0644);

	cl_git_pass(git_checkout_tree(repo, obj, &checkout_opts));
	assert_name_is("testrepo/new.txt");
}

void test_checkout_icase__overwrites_links_for_files(void)
{
	cl_must_pass(p_symlink("../tmp", "testrepo/NEW.txt"));

	cl_git_pass(git_checkout_tree(repo, obj, &checkout_opts));

	cl_assert(!git_path_exists("tmp"));
	assert_name_is("testrepo/new.txt");
}

void test_checkout_icase__overwites_folders_for_files(void)
{
	cl_must_pass(p_mkdir("testrepo/NEW.txt", 0777));

	cl_git_pass(git_checkout_tree(repo, obj, &checkout_opts));

	assert_name_is("testrepo/new.txt");
	cl_assert(!git_path_isdir("testrepo/new.txt"));
}

void test_checkout_icase__overwrites_files_for_folders(void)
{
	cl_git_write2file("testrepo/A", "neue file\n", 10, \
		O_WRONLY | O_CREAT | O_TRUNC, 0644);

	cl_git_pass(git_checkout_tree(repo, obj, &checkout_opts));
	assert_name_is("testrepo/a");
	cl_assert(git_path_isdir("testrepo/a"));
}

void test_checkout_icase__overwrites_links_for_folders(void)
{
	cl_must_pass(p_symlink("..", "testrepo/A"));

	cl_git_pass(git_checkout_tree(repo, obj, &checkout_opts));

	cl_assert(!git_path_exists("b.txt"));
	assert_name_is("testrepo/a");
}