from einops.layers.torch import Rearrange
from torch import nn


class PatchEmbeddings(nn.Module):
    def __init__(self, dim_in, dim_out, seq_len):
        super().__init__()
        self.embedding = nn.Sequential(
            Rearrange("... rd -> ... (r d)"),
            nn.LayerNorm(seq_len * dim_in),
            nn.Linear(seq_len * dim_in, dim_out),
            nn.LayerNorm(dim_out),
        )

    def forward(self, x):
        return self.embedding(x)
