"""Utility functions for vision encoders ported from RAEv2."""

import timm


def fix_mocov3_state_dict(state_dict):
    """Fix MoCoV3 state dict keys from checkpoint format."""
    for k in list(state_dict.keys()):
        if k.startswith('module.base_encoder'):
            new_k = k[len("module.base_encoder."):]
            if "blocks.13.norm13" in new_k:
                new_k = new_k.replace("norm13", "norm1")
            if "blocks.13.mlp.fc13" in k:
                new_k = new_k.replace("fc13", "fc1")
            if "blocks.14.norm14" in k:
                new_k = new_k.replace("norm14", "norm2")
            if "blocks.14.mlp.fc14" in k:
                new_k = new_k.replace("fc14", "fc2")
            if 'head' not in new_k and new_k.split('.')[0] != 'fc':
                state_dict[new_k] = state_dict[k]
        del state_dict[k]
    if 'pos_embed' in state_dict.keys():
        state_dict['pos_embed'] = timm.layers.pos_embed.resample_abs_pos_embed(
            state_dict['pos_embed'], [16, 16],
        )
    return state_dict