#include <fx/core/error.h>
#include <fx/core/status.h>
#include <fx/io/file.h>
#include <errno.h>
#include <sys/stat.h>

enum fx_status fx_status_from_errno(int error, enum fx_status default_value)
{
	switch (error) {
	case 0:
		return FX_SUCCESS;
	case ENOENT:
		return FX_ERR_NO_ENTRY;
	case EEXIST:
		return FX_ERR_NAME_EXISTS;
	case ENOMEM:
		return FX_ERR_NO_MEMORY;
	case EINVAL:
		return FX_ERR_INVALID_ARGUMENT;
	case EIO:
		return FX_ERR_IO_FAILURE;
	case EISDIR:
		return FX_ERR_IS_DIRECTORY;
	case ENOTDIR:
		return FX_ERR_NOT_DIRECTORY;
	case EPERM:
	case EACCES:
		return FX_ERR_PERMISSION_DENIED;
	case ENOTSUP:
	case ENOSYS:
		return FX_ERR_NOT_SUPPORTED;
	default:
		return default_value;
	}
}

fx_result fx_result_from_errno_with_filepath(
	int error, const char *path, enum fx_status default_value)
{
	switch (error) {
	case 0:
		return FX_RESULT_SUCCESS;
	case ENOENT:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_NO_ENTRY, "Path @i{%s} does not exist", path);
	case ENOTDIR:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_NOT_DIRECTORY, "Path @i{%s} is not a directory",
			path);
	case EISDIR:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_IS_DIRECTORY, "Path @i{%s} is a directory", path);
	case EPERM:
	case EACCES:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_PERMISSION_DENIED,
			"Permission denied while accessing path @i{%s}", path);
	default:
		return FX_RESULT_STATUS(fx_status_from_errno(error, default_value));
	}

	return FX_RESULT_SUCCESS;
}

fx_result fx_result_from_errno_with_subfilepath(
	int error, const char *path, const char *dir_path,
	enum fx_status default_value)
{
	if (!dir_path) {
		return fx_result_propagate(fx_result_from_errno_with_filepath(
			error, path, default_value));
	}

	switch (error) {
	case 0:
		return FX_RESULT_SUCCESS;
	case ENOENT:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_NO_ENTRY,
			"Path @i{%s} in directory @i{%s} does not exist", path,
			dir_path);
	case ENOTDIR:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_NOT_DIRECTORY,
			"Path @i{%s} in directory @i{%s} is not a directory",
			path, dir_path);
	case EISDIR:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_IS_DIRECTORY,
			"Path @i{%s} in directory @i{%s} is a directory", path,
			dir_path);
	case EPERM:
	case EACCES:
		return FX_RESULT_STATUS_WITH_STRING(
			FX_ERR_PERMISSION_DENIED,
			"Permission denied while accessing path @i{%s} in "
			"directory @i{%s}",
			path, dir_path);
	default:
		return FX_RESULT_STATUS(fx_status_from_errno(error, default_value));
	}

	return FX_RESULT_SUCCESS;
}

enum fx_status fx_file_info_from_stat(const struct stat *st, struct fx_file_info *out)
{
	out->length = st->st_size;

	if (S_ISREG(st->st_mode)) {
		out->attrib |= FX_FILE_ATTRIB_NORMAL;
	}

	if (S_ISDIR(st->st_mode)) {
		out->attrib |= FX_FILE_ATTRIB_DIRECTORY;
	}

	if (S_ISBLK(st->st_mode)) {
		out->attrib |= FX_FILE_ATTRIB_BLOCK_DEVICE;
	}

	if (S_ISCHR(st->st_mode)) {
		out->attrib |= FX_FILE_ATTRIB_CHAR_DEVICE;
	}

	if (S_ISLNK(st->st_mode)) {
		out->attrib |= FX_FILE_ATTRIB_SYMLINK;
	}

	return FX_SUCCESS;
}