import torch.nn as nn
import torch.nn.functional as F

def _make_divisible(v, divisor, min_value=None):
    """
    This function is taken from the original tf repo.
    It ensures that all layers have a channel number that is divisible by 8
    It can be seen here:
    https://github.com/tensorflow/models/blob/master/research/slim/nets/mobilenet/mobilenet.py
    :param v:
    :param divisor:
    :param min_value:
    :return:
    """
    if min_value is None:
        min_value = divisor
    new_v = max(min_value, int(v + divisor / 2) // divisor * divisor)
    # Make sure that round down does not go down by more than 10%.
    if new_v < 0.9 * v:
        new_v += divisor
    return new_v

from timm.models.layers import SqueezeExcite

import torch
import torch.nn.functional as F

class GAM_Attention(nn.Module):
    def __init__(self, in_channels, rate=4):
        super(GAM_Attention, self).__init__()
 
        self.channel_attention = nn.Sequential(
            nn.Linear(in_channels, int(in_channels / rate)),
            # nn.ReLU(inplace=True),
            nn.GELU(),
            nn.Linear(int(in_channels / rate), in_channels)
        )
 
        self.spatial_attention = nn.Sequential(
            nn.Conv2d(in_channels, int(in_channels / rate), kernel_size=7, padding=3),
            nn.BatchNorm2d(int(in_channels / rate)),
            # nn.ReLU(inplace=True),
            nn.GELU(),
            nn.Conv2d(int(in_channels / rate), in_channels, kernel_size=7, padding=3),
            nn.BatchNorm2d(in_channels)
        )
 
    def forward(self, x):
        b, c, h, w = x.shape
        x_permute = x.permute(0, 2, 3, 1).view(b, -1, c)
        x_att_permute = self.channel_attention(x_permute).view(b, h, w, c)
        x_channel_att = x_att_permute.permute(0, 3, 1, 2).sigmoid()
        x = x * x_channel_att
        x_spatial_att = self.spatial_attention(x).sigmoid()
        out = x * x_spatial_att
 
        return out

class Simam(torch.nn.Module):
    def __init__(self, channels = None, e_lambda = 1e-4):
        super(Simam, self).__init__()

        self.activaton = nn.Sigmoid()
        self.e_lambda = e_lambda

    def __repr__(self):
        s = self.__class__.__name__ + '('
        s += ('lambda=%f)' % self.e_lambda)
        return s

    @staticmethod
    def get_module_name():
        return "simam"

    def forward(self, x):

        b, c, h, w = x.size()
        
        n = w * h - 1

        x_minus_mu_square = (x - x.mean(dim=[2,3], keepdim=True)).pow(2)
        y = x_minus_mu_square / (4 * (x_minus_mu_square.sum(dim=[2,3], keepdim=True) / n + self.e_lambda)) + 0.5

        return x * self.activaton(y)

class EMA(nn.Module):
    def __init__(self, channels, factor=8):
        super(EMA, self).__init__()
        self.groups = factor
        assert channels // self.groups > 0
        self.softmax = nn.Softmax(-1)
        self.agp = nn.AdaptiveAvgPool2d((1, 1))
        self.pool_h = nn.AdaptiveAvgPool2d((None, 1))
        self.pool_w = nn.AdaptiveAvgPool2d((1, None))
        self.gn = nn.GroupNorm(channels // self.groups, channels // self.groups)
        self.conv1x1 = nn.Conv2d(channels // self.groups, channels // self.groups, kernel_size=1, stride=1, padding=0)
        self.conv3x3 = nn.Conv2d(channels // self.groups, channels // self.groups, kernel_size=3, stride=1, padding=1)

    def forward(self, x):
        b, c, h, w = x.size()
        group_x = x.reshape(b * self.groups, -1, h, w)  # b*g,c//g,h,w
        x_h = self.pool_h(group_x)
        x_w = self.pool_w(group_x).permute(0, 1, 3, 2)
        hw = self.conv1x1(torch.cat([x_h, x_w], dim=2))
        x_h, x_w = torch.split(hw, [h, w], dim=2)
        x1 = self.gn(group_x * x_h.sigmoid() * x_w.permute(0, 1, 3, 2).sigmoid())
        x2 = self.conv3x3(group_x)
        x11 = self.softmax(self.agp(x1).reshape(b * self.groups, -1, 1).permute(0, 2, 1))
        x12 = x2.reshape(b * self.groups, c // self.groups, -1)  # b*g, c//g, hw
        x21 = self.softmax(self.agp(x2).reshape(b * self.groups, -1, 1).permute(0, 2, 1))
        x22 = x1.reshape(b * self.groups, c // self.groups, -1)  # b*g, c//g, hw
        weights = (torch.matmul(x11, x12) + torch.matmul(x21, x22)).reshape(b * self.groups, 1, h, w)
        return (group_x * weights.sigmoid()).reshape(b, c, h, w)

class Conv2d_BN(torch.nn.Sequential):
    def __init__(self, a, b, ks=1, stride=1, pad=0, dilation=1,
                 groups=1, bn_weight_init=1, resolution=-10000):
        super().__init__()
        self.add_module('c', torch.nn.Conv2d(
            a, b, ks, stride, pad, dilation, groups, bias=False))
        self.add_module('bn', torch.nn.BatchNorm2d(b))
        torch.nn.init.constant_(self.bn.weight, bn_weight_init)
        torch.nn.init.constant_(self.bn.bias, 0)

    @torch.no_grad()
    def fuse(self):
        c, bn = self._modules.values()
        w = bn.weight / (bn.running_var + bn.eps)**0.5
        w = c.weight * w[:, None, None, None]
        b = bn.bias - bn.running_mean * bn.weight / \
            (bn.running_var + bn.eps)**0.5
        m = torch.nn.Conv2d(w.size(1) * self.c.groups, w.size(
            0), w.shape[2:], stride=self.c.stride, padding=self.c.padding, dilation=self.c.dilation, groups=self.c.groups,
            device=c.weight.device)
        m.weight.data.copy_(w)
        m.bias.data.copy_(b)
        return m

class Residual(torch.nn.Module):
    def __init__(self, m, drop=0.):
        super().__init__()
        self.m = m
        self.drop = drop

    def forward(self, x):
        if self.training and self.drop > 0:
            return x + self.m(x) * torch.rand(x.size(0), 1, 1, 1,
                                              device=x.device).ge_(self.drop).div(1 - self.drop).detach()
        else:
            return x + self.m(x)
    
    @torch.no_grad()
    def fuse(self):
        if isinstance(self.m, Conv2d_BN):
            m = self.m.fuse()
            assert(m.groups == m.in_channels)
            identity = torch.ones(m.weight.shape[0], m.weight.shape[1], 1, 1)
            identity = torch.nn.functional.pad(identity, [1,1,1,1])
            m.weight += identity.to(m.weight.device)
            return m
        elif isinstance(self.m, torch.nn.Conv2d):
            m = self.m
            assert(m.groups != m.in_channels)
            identity = torch.ones(m.weight.shape[0], m.weight.shape[1], 1, 1)
            identity = torch.nn.functional.pad(identity, [1,1,1,1])
            m.weight += identity.to(m.weight.device)
            return m
        else:
            return self

class RepVGGDW(torch.nn.Module):
    def __init__(self, ed) -> None:
        super().__init__()
        self.conv = Conv2d_BN(ed, ed, 3, 1, 1, groups=ed)
        self.conv1 = torch.nn.Conv2d(ed, ed, 1, 1, 0, groups=ed)
        self.dim = ed
        self.bn = torch.nn.BatchNorm2d(ed)
    
    def forward(self, x):
        return self.bn((self.conv(x) + self.conv1(x)) + x)
    
    @torch.no_grad()
    def fuse(self):
        conv = self.conv.fuse()
        conv1 = self.conv1
        
        conv_w = conv.weight
        conv_b = conv.bias
        conv1_w = conv1.weight
        conv1_b = conv1.bias
        
        conv1_w = torch.nn.functional.pad(conv1_w, [1,1,1,1])

        identity = torch.nn.functional.pad(torch.ones(conv1_w.shape[0], conv1_w.shape[1], 1, 1, device=conv1_w.device), [1,1,1,1])

        final_conv_w = conv_w + conv1_w + identity
        final_conv_b = conv_b + conv1_b

        conv.weight.data.copy_(final_conv_w)
        conv.bias.data.copy_(final_conv_b)

        bn = self.bn
        w = bn.weight / (bn.running_var + bn.eps)**0.5
        w = conv.weight * w[:, None, None, None]
        b = bn.bias + (conv.bias - bn.running_mean) * bn.weight / \
            (bn.running_var + bn.eps)**0.5
        conv.weight.data.copy_(w)
        conv.bias.data.copy_(b)
        return conv


class RepViTBlock(nn.Module):
    def __init__(self, inp, hidden_dim, oup, kernel_size, stride, use_se, use_hs):
        super(RepViTBlock, self).__init__()
        assert stride in [1, 2]

        self.identity = stride == 1 and inp == oup
        assert(hidden_dim == 2 * inp)

        if stride == 2:
            self.token_mixer = nn.Sequential(
                Conv2d_BN(inp, inp, kernel_size, stride, (kernel_size - 1) // 2, groups=inp),
                RepVGGDW(inp),
                SqueezeExcite(inp, 0.25) if use_se else nn.Identity(),
                Conv2d_BN(inp, oup, ks=1, stride=1, pad=0)
            )
            
            self.channel_mixer = Residual(nn.Sequential(
                    # pw
                    Conv2d_BN(oup, 2 * oup, 1, 1, 0),
                    nn.GELU() if use_hs else nn.GELU(),
                    # pw-linear
                    Conv2d_BN(2 * oup, oup, 1, 1, 0, bn_weight_init=0),
                ))
        else:
            assert(self.identity)
            self.token_mixer = nn.Sequential(
                RepVGGDW(inp),
                SqueezeExcite(inp, 0.25) if use_se else nn.Identity(),
            )
            
            self.channel_mixer = Residual(nn.Sequential(
                    # pw
                    Conv2d_BN(inp, hidden_dim, 1, 1, 0),
                    nn.GELU() if use_hs else nn.GELU(),
                    # pw-linear
                    Conv2d_BN(hidden_dim, oup, 1, 1, 0, bn_weight_init=0),
                ))

    def forward(self, x):
        return self.channel_mixer(self.token_mixer(x))

from timm.models.vision_transformer import trunc_normal_
class BN_Linear(torch.nn.Sequential):
    def __init__(self, a, b, bias=True, std=0.02):
        super().__init__()
        self.add_module('bn', torch.nn.BatchNorm1d(a))
        self.add_module('l', torch.nn.Linear(a, b, bias=bias))
        trunc_normal_(self.l.weight, std=std)
        if bias:
            torch.nn.init.constant_(self.l.bias, 0)

    @torch.no_grad()
    def fuse(self):
        bn, l = self._modules.values()
        w = bn.weight / (bn.running_var + bn.eps)**0.5
        b = bn.bias - self.bn.running_mean * \
            self.bn.weight / (bn.running_var + bn.eps)**0.5
        w = l.weight * w[None, :]
        if l.bias is None:
            b = b @ self.l.weight.T
        else:
            b = (l.weight @ b[:, None]).view(-1) + self.l.bias
        m = torch.nn.Linear(w.size(1), w.size(0), device=l.weight.device)
        m.weight.data.copy_(w)
        m.bias.data.copy_(b)
        return m

class Classfier(nn.Module):
    def __init__(self, dim, num_classes, distillation=True):
        super().__init__()
        self.classifier = BN_Linear(dim, num_classes) if num_classes > 0 else torch.nn.Identity()
        self.distillation = distillation
        if distillation:
            self.classifier_dist = BN_Linear(dim, num_classes) if num_classes > 0 else torch.nn.Identity()

    def forward(self, x):
        if self.distillation:
            x = self.classifier(x), self.classifier_dist(x)
            if not self.training:
                x = (x[0] + x[1]) / 2
        else:
            x = self.classifier(x)
        return x

    @torch.no_grad()
    def fuse(self):
        classifier = self.classifier.fuse()
        if self.distillation:
            classifier_dist = self.classifier_dist.fuse()
            classifier.weight += classifier_dist.weight
            classifier.bias += classifier_dist.bias
            classifier.weight /= 2
            classifier.bias /= 2
            return classifier
        else:
            return classifier

class RepViT(nn.Module):
    def __init__(self, cfgs, num_classes=1000, distillation=False):
        super(RepViT, self).__init__()
        # setting of inverted residual blocks
        self.cfgs = cfgs

        # building first layer
        input_channel = self.cfgs[0][2]
        patch_embed = torch.nn.Sequential(Conv2d_BN(3, input_channel // 2, 3, 2, 1), torch.nn.GELU(),
                           Conv2d_BN(input_channel // 2, input_channel, 3, 2, 1))
        layers = [patch_embed]
        layers.append(GAM_Attention(in_channels=input_channel))
        layers.append(Simam())
        # building inverted residual blocks
        block = RepViTBlock
        for k, t, c, use_se, use_hs, s in self.cfgs:
            output_channel = _make_divisible(c, 8)
            exp_size = _make_divisible(input_channel * t, 8)
            layers.append(block(input_channel, exp_size, output_channel, k, s, use_se, use_hs))
            input_channel = output_channel
        self.features = nn.ModuleList(layers)
        self.ema = EMA(output_channel)
        self.classifier = Classfier(output_channel, num_classes, distillation)
        # self._initialize_weights()
   
    def forward(self, x):
        # x = self.features(x)
        for i, f in enumerate(self.features):
            # print(f.__class__.__name__, 'features shape: \t',f(x).shape)
            x = f(x)
        
        x = self.ema(x)
        x = torch.nn.functional.adaptive_avg_pool2d(x, 1).flatten(1) #[1, 256]
        x = self.classifier(x)
        return x
    
    def _initialize_weights(self):
        for m in self.modules():
            if isinstance(m, nn.Conv2d):
                nn.init.kaiming_normal_(m.weight, mode='fan_out', nonlinearity='relu')
                if m.bias is not None:
                    nn.init.constant_(m.bias, 0)
            elif isinstance(m, nn.Linear):
                nn.init.normal_(m.weight, 0, 0.01)
                nn.init.constant_(m.bias, 0)


from timm.models import register_model


@register_model
def repvit_m0_6(pretrained=False, num_classes = 1000, distillation=False):
    """
    Constructs a MobileNetV3-Large model
    """
    cfgs = [
        [3,   2,  40, 1, 0, 1],
        [3,   2,  40, 0, 0, 1],
        [3,   2,  80, 0, 0, 2],
        [3,   2,  80, 1, 0, 1],
        [3,   2,  80, 0, 0, 1],
        [3,   2,  160, 0, 1, 2],
        [3,   2, 160, 1, 1, 1],
        [3,   2, 160, 0, 1, 1],
        [3,   2, 160, 1, 1, 1],
        [3,   2, 160, 0, 1, 1],
        [3,   2, 160, 1, 1, 1],
        [3,   2, 160, 0, 1, 1],
        [3,   2, 160, 1, 1, 1],
        [3,   2, 160, 0, 1, 1],
        [3,   2, 160, 0, 1, 1],
        [3,   2, 320, 0, 1, 2],
        [3,   2, 320, 1, 1, 1],
    ]
    return RepViT(cfgs, num_classes=num_classes, distillation=distillation)


@register_model
def repvit_m0_9(pretrained=False, num_classes = 1000, distillation=False):
    """
    Constructs a MobileNetV3-Large model
    """
    cfgs = [
        # k, t, c, SE, HS, s 
        [3,   2,  48, 1, 0, 1],
        [3,   2,  48, 0, 0, 1],
        [3,   2,  48, 0, 0, 1],
        [3,   2,  96, 0, 0, 2],
        [3,   2,  96, 1, 0, 1],
        [3,   2,  96, 0, 0, 1],
        [3,   2,  96, 0, 0, 1],
        [3,   2,  192, 0, 1, 2],
        [3,   2,  192, 1, 1, 1],
        [3,   2,  192, 0, 1, 1],
        [3,   2,  192, 1, 1, 1],
        [3,   2, 192, 0, 1, 1],
        [3,   2, 192, 1, 1, 1],
        [3,   2, 192, 0, 1, 1],
        [3,   2, 192, 1, 1, 1],
        [3,   2, 192, 0, 1, 1],
        [3,   2, 192, 1, 1, 1],
        [3,   2, 192, 0, 1, 1],
        [3,   2, 192, 1, 1, 1],
        [3,   2, 192, 0, 1, 1],
        [3,   2, 192, 1, 1, 1],
        [3,   2, 192, 0, 1, 1],
        [3,   2, 192, 0, 1, 1],
        [3,   2, 384, 0, 1, 2],
        [3,   2, 384, 1, 1, 1],
        [3,   2, 384, 0, 1, 1]
    ]
    return RepViT(cfgs, num_classes=num_classes, distillation=distillation)
'''
@register_model
def repvit_m0_9(pretrained=False, num_classes = 1000, distillation=False):#单独减少通道掉点接近9个
    """
    Constructs a MobileNetV3-Large model
    """
    cfgs = [
        # k, t, c, SE, HS, s 
        [3,   2,  48, 1, 0, 1],
        [3,   2,  48, 0, 0, 1],
        [3,   2,  48, 0, 0, 1],
        [3,   2,  64, 0, 0, 2],
        [3,   2,  64, 1, 0, 1],
        [3,   2,  64, 0, 0, 1],
        [3,   2,  64, 0, 0, 1],
        [3,   2,  128, 0, 1, 2],
        [3,   2,  128, 1, 1, 1],
        [3,   2,  128, 0, 1, 1],
        [3,   2,  128, 1, 1, 1],
        [3,   2, 128, 0, 1, 1],
        [3,   2, 128, 1, 1, 1],
        [3,   2, 128, 0, 1, 1],
        [3,   2, 128, 1, 1, 1],
        [3,   2, 128, 0, 1, 1],
        [3,   2, 128, 1, 1, 1],
        [3,   2, 128, 0, 1, 1],
        [3,   2, 128, 1, 1, 1],
        [3,   2, 128, 0, 1, 1],
        [3,   2, 128, 1, 1, 1],
        [3,   2, 128, 0, 1, 1],
        [3,   2, 128, 0, 1, 1],
        [3,   2, 256, 0, 1, 2],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1]
    ]
    return RepViT(cfgs, num_classes=num_classes, distillation=distillation)
'''
@register_model
def repvit_m1_0(pretrained=False, num_classes = 1000, distillation=False):
    """
    Constructs a MobileNetV3-Large model
    """
    cfgs = [
        # k, t, c, SE, HS, s 
        [3,   2,  56, 1, 0, 1],
        [3,   2,  56, 0, 0, 1],
        [3,   2,  56, 0, 0, 1],
        [3,   2,  112, 0, 0, 2],
        [3,   2,  112, 1, 0, 1],
        [3,   2,  112, 0, 0, 1],
        [3,   2,  112, 0, 0, 1],
        [3,   2,  224, 0, 1, 2],
        [3,   2,  224, 1, 1, 1],
        [3,   2,  224, 0, 1, 1],
        [3,   2,  224, 1, 1, 1],
        [3,   2, 224, 0, 1, 1],
        [3,   2, 224, 1, 1, 1],
        [3,   2, 224, 0, 1, 1],
        [3,   2, 224, 1, 1, 1],
        [3,   2, 224, 0, 1, 1],
        [3,   2, 224, 1, 1, 1],
        [3,   2, 224, 0, 1, 1],
        [3,   2, 224, 1, 1, 1],
        [3,   2, 224, 0, 1, 1],
        [3,   2, 224, 1, 1, 1],
        [3,   2, 224, 0, 1, 1],
        [3,   2, 224, 0, 1, 1],
        [3,   2, 448, 0, 1, 2],
        [3,   2, 448, 1, 1, 1],
        [3,   2, 448, 0, 1, 1]
    ]
    return RepViT(cfgs, num_classes=num_classes, distillation=distillation)


@register_model
def repvit_m1_1(pretrained=False, num_classes = 1000, distillation=False):
    """
    Constructs a MobileNetV3-Large model
    """
    cfgs = [
        # k, t, c, SE, HS, s 
        [3,   2,  64, 1, 0, 1],
        [3,   2,  64, 0, 0, 1],
        [3,   2,  64, 0, 0, 1],
        [3,   2,  128, 0, 0, 2],
        [3,   2,  128, 1, 0, 1],
        [3,   2,  128, 0, 0, 1],
        [3,   2,  128, 0, 0, 1],
        [3,   2,  256, 0, 1, 2],
        [3,   2,  256, 1, 1, 1],
        [3,   2,  256, 0, 1, 1],
        [3,   2,  256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 512, 0, 1, 2],
        [3,   2, 512, 1, 1, 1],
        [3,   2, 512, 0, 1, 1]
    ]
    return RepViT(cfgs, num_classes=num_classes, distillation=distillation)


@register_model
def repvit_m1_5(pretrained=False, num_classes = 1000, distillation=False):
    """
    Constructs a MobileNetV3-Large model
    """
    cfgs = [
        # k, t, c, SE, HS, s 
        [3,   2,  64, 1, 0, 1],
        [3,   2,  64, 0, 0, 1],
        [3,   2,  64, 1, 0, 1],
        [3,   2,  64, 0, 0, 1],
        [3,   2,  64, 0, 0, 1],
        [3,   2,  128, 0, 0, 2],
        [3,   2,  128, 1, 0, 1],
        [3,   2,  128, 0, 0, 1],
        [3,   2,  128, 1, 0, 1],
        [3,   2,  128, 0, 0, 1],
        [3,   2,  128, 0, 0, 1],
        [3,   2,  256, 0, 1, 2],
        [3,   2,  256, 1, 1, 1],
        [3,   2,  256, 0, 1, 1],
        [3,   2,  256, 1, 1, 1],
        [3,   2,  256, 0, 1, 1],
        [3,   2,  256, 1, 1, 1],
        [3,   2,  256, 0, 1, 1],
        [3,   2,  256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 1, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 256, 0, 1, 1],
        [3,   2, 512, 0, 1, 2],
        [3,   2, 512, 1, 1, 1],
        [3,   2, 512, 0, 1, 1],
        [3,   2, 512, 1, 1, 1],
        [3,   2, 512, 0, 1, 1]
    ]
    return RepViT(cfgs, num_classes=num_classes, distillation=distillation)


@register_model
def repvit_m2_3(pretrained=False, num_classes = 1000, distillation=False):
    """
    Constructs a MobileNetV3-Large model
    """
    cfgs = [
        # k, t, c, SE, HS, s 
        [3,   2,  80, 1, 0, 1],
        [3,   2,  80, 0, 0, 1],
        [3,   2,  80, 1, 0, 1],
        [3,   2,  80, 0, 0, 1],
        [3,   2,  80, 1, 0, 1],
        [3,   2,  80, 0, 0, 1],
        [3,   2,  80, 0, 0, 1],
        [3,   2,  160, 0, 0, 2],
        [3,   2,  160, 1, 0, 1],
        [3,   2,  160, 0, 0, 1],
        [3,   2,  160, 1, 0, 1],
        [3,   2,  160, 0, 0, 1],
        [3,   2,  160, 1, 0, 1],
        [3,   2,  160, 0, 0, 1],
        [3,   2,  160, 0, 0, 1],
        [3,   2,  320, 0, 1, 2],
        [3,   2,  320, 1, 1, 1],
        [3,   2,  320, 0, 1, 1],
        [3,   2,  320, 1, 1, 1],
        [3,   2,  320, 0, 1, 1],
        [3,   2,  320, 1, 1, 1],
        [3,   2,  320, 0, 1, 1],
        [3,   2,  320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 1, 1, 1],
        [3,   2, 320, 0, 1, 1],
        # [3,   2, 320, 1, 1, 1],
        # [3,   2, 320, 0, 1, 1],
        [3,   2, 320, 0, 1, 1],
        [3,   2, 640, 0, 1, 2],
        [3,   2, 640, 1, 1, 1],
        [3,   2, 640, 0, 1, 1],
        # [3,   2, 640, 1, 1, 1],
        # [3,   2, 640, 0, 1, 1]
    ]    
    return RepViT(cfgs, num_classes=num_classes, distillation=distillation)