import torch.nn as nn

class Projections(nn.Module):
    def __init__(self, clip_embed, phi_embed, num_projection_layers=6):
        super().__init__()

        self.output = nn.Linear(clip_embed, phi_embed)
        self.norm = nn.LayerNorm(phi_embed)
        self.projection_layers = nn.ModuleList(
            [
                nn.Sequential(
                    nn.Linear(phi_embed, phi_embed),
                    nn.GELU(),  
                    nn.Linear(phi_embed, phi_embed),
                )
                for _ in range(num_projection_layers)
            ]
        )

    def forward(self, x):
        x = self.output(x)
        x = self.norm(x)
        for layer in self.projection_layers:
            residual = x
            x = layer(x) + residual 
        
        return x