import torch
from torch import nn


class Conv2dBlock(nn.Module):


    def __init__(self, in_c, out_c, ker_size=(3, 3), stride=1, padding=1, batch_norm=True, relu=True):
        super(Conv2dBlock, self).__init__()
        self.conv2d = nn.Conv2d(in_c, out_c, ker_size, stride, padding)
        if(batch_norm):
            self.batch_norm = nn.BatchNorm2d(out_c, eps=1e-5, momentum=0.05, affine=True)
        if(relu):
            self.relu = nn.ReLU(inplace=True)


    def forward(self, x):
        for module in self.children():
            x = module(x)
        return x


class ConvTranspose2dBlock(nn.Module):


    def __init__(self, in_c, out_c, ker_size=(3, 3), stride=1, padding=1, batch_norm=True, relu=True):
        super(ConvTranspose2dBlock, self).__init__()
        self.convtranpose2d = nn.ConvTranspose2d(in_c, out_c, ker_size, stride, padding)
        if(batch_norm):
            self.batch_norm = nn.BatchNorm2d(out_c, eps=1e-5, momentum=0.05, affine=True)
        if(relu):
            self.relu = nn.ReLU(inplace=True)


    def forward(self, x):
        for module in self.children():
            x = module(x)
        return x


class DownSampleBlock(nn.Module):


    def __init__(self, ker_size=(2,2), stride=2, dilation=(1,1), ceil_mode=False, p=0.0):
        super(DownSampleBlock, self).__init__()
        self.maxpooling = nn.MaxPool2d(kernel_size=ker_size, stride=stride, dilation=dilation, ceil_mode=ceil_mode)
        if(p):
            self.dropout = nn.Dropout(p)


    def forward(self, x):
        for module in self.children():
            x = module(x)
        return x


class UpSampleBlock(nn.Module):

    
    def __init__(self, in_c, out_c, kernel_size, stride, padding, scale_factor=(2, 2), mode='bilinear', batch_norm=True, p=0.0):
        super(UpSampleBlock, self).__init__()
        self.upsample = nn.Upsample(scale_factor=scale_factor, mode=mode)
        self.conv2d = nn.Conv2d(in_c, out_c, kernel_size=kernel_size, stride=stride, padding=padding)
        if(batch_norm):
            self.batch_norm = nn.BatchNorm2d(out_c, eps=1e-5, momentum=0.05, affine=True)
        if(p):
            self.dropout = nn.Dropout(p)
    

    def forward(self, x):
        for module in self.children():
            x = module(x)
        return x