package btrfs

import (
	"reflect"
	"testing"
	"unsafe"
)

var caseSizes = []struct {
	obj  interface{}
	size int
}{
	{obj: btrfs_ioctl_vol_args{}, size: 4096},
	{obj: btrfs_qgroup_limit{}, size: 40},
	{obj: btrfs_qgroup_inherit{}, size: 72},
	{obj: btrfs_ioctl_qgroup_limit_args{}, size: 48},
	{obj: btrfs_ioctl_vol_args_v2{}, size: 4096},
	{obj: btrfs_scrub_progress{}, size: 120},
	{obj: btrfs_ioctl_scrub_args{}, size: 1024},
	{obj: btrfs_ioctl_dev_replace_start_params{}, size: 2072},
	{obj: btrfs_ioctl_dev_replace_status_params{}, size: 48},
	{obj: btrfs_ioctl_dev_replace_args_u1{}, size: 2600},
	{obj: btrfs_ioctl_dev_replace_args_u2{}, size: 2600},
	{obj: btrfs_ioctl_dev_info_args{}, size: 4096},
	{obj: btrfs_ioctl_fs_info_args{}, size: 1024},
	{obj: btrfs_ioctl_feature_flags{}, size: 24},
	{obj: btrfs_balance_args{}, size: 136},
	{obj: BalanceProgress{}, size: 24},
	{obj: btrfs_ioctl_balance_args{}, size: 1024},
	{obj: btrfs_ioctl_ino_lookup_args{}, size: 4096},
	{obj: btrfs_ioctl_search_key{}, size: 104},
	{obj: btrfs_ioctl_search_header{}, size: 32},
	{obj: btrfs_ioctl_search_args{}, size: 4096},
	{obj: btrfs_ioctl_search_args_v2{}, size: 112},
	{obj: btrfs_ioctl_clone_range_args{}, size: 32},
	{obj: btrfs_ioctl_same_extent_info{}, size: 32},
	{obj: btrfs_ioctl_same_args{}, size: 24},
	{obj: btrfs_ioctl_defrag_range_args{}, size: 48},
	{obj: btrfs_ioctl_space_info{}, size: 24},
	{obj: btrfs_ioctl_space_args{}, size: 16},
	{obj: btrfs_data_container{}, size: 16},
	{obj: btrfs_ioctl_ino_path_args{}, size: 56},
	{obj: btrfs_ioctl_logical_ino_args{}, size: 56},
	{obj: btrfs_ioctl_get_dev_stats{}, size: 1032},
	{obj: btrfs_ioctl_quota_ctl_args{}, size: 16},
	{obj: btrfs_ioctl_qgroup_assign_args{}, size: 24},
	{obj: btrfs_ioctl_qgroup_create_args{}, size: 16},
	{obj: btrfs_ioctl_timespec{}, size: 16},
	{obj: btrfs_ioctl_received_subvol_args{}, size: 200},
	{obj: btrfs_ioctl_send_args{}, size: 72},

	//{obj:btrfs_timespec{},size:12},
	//{obj:btrfs_root_ref{},size:18},
	//{obj:btrfs_root_item{},size:439},
	{obj: btrfs_root_item_raw{}, size: 439},
	{obj: btrfs_root_item_raw_p1{}, size: 439 - 23 - int(unsafe.Sizeof(btrfs_root_item_raw_p3{}))},
	{obj: btrfs_root_item_raw_p3{}, size: 439 - 23 - int(unsafe.Sizeof(btrfs_root_item_raw_p1{}))},
	//{obj:btrfs_inode_item{},size:160},
	{obj: btrfs_inode_item_raw{}, size: 160},
	{obj: timeBlock{}, size: 4 * 12},
}

func TestSizes(t *testing.T) {
	for _, c := range caseSizes {
		if sz := int(reflect.ValueOf(c.obj).Type().Size()); sz != c.size {
			t.Errorf("unexpected size of %T: %d (exp: %d)", c.obj, sz, c.size)
		}
	}
}