import torch
from torch.profiler import profile
from bit_transformer import (
    BitTransformerLM,
    quantize_dynamic,
    hil_safe_inference,
    collapse_submodel,
)
from bit_transformer.training import train_loop
from bit_transformer.torch_utils import cpu_autocast

def train(
    model: BitTransformerLM,
    data: torch.Tensor,
    epochs: int = 3,
    compress_prob: float = 0.5,
    direct_prob: float = 0.0,
    log: bool = False,
    forward_kwargs: dict | None = None,
) -> list[dict]:
    """Train on bit sequences with optional random compression.

    If ``direct_prob`` is positive, some batches are fed using their
    run-length encoded representation packed into bits. Loss on these
    direct-compressed batches is tracked separately.

    Returns a list of per-epoch metric dictionaries containing raw and
    compressed loss/accuracy statistics and the mean compression ratio.
    """
    return train_loop(
        model,
        data,
        epochs=epochs,
        compress_prob=compress_prob,
        direct_prob=direct_prob,
        log=log,
        forward_kwargs=forward_kwargs,
    )


def main() -> None:
    data = torch.randint(0, 2, (64, 128), dtype=torch.long)
    validation_bits = torch.randint(0, 2, (16, 128), dtype=torch.long)
    input_bits = torch.randint(0, 2, (1, 128), dtype=torch.long)
    bit_sequence_data = data.tolist()

    model = BitTransformerLM(
        d_model=32,
        nhead=4,
        num_layers=1,
        dim_feedforward=64,
        max_seq_len=128,
        use_act=True,
        act_threshold=0.7,
        reversible=True,
        chunk_size=128,
    )

    for step in range(1, 13):
        if step % 2 == 0:
            model = model.double_width()
        else:
            model = model.double_layers()
        train(model, data, epochs=3, compress_prob=0.5, log=True)
        _, telemetry = model(validation_bits)
        K = telemetry["negentropy_logits"].mean().item()
        C = telemetry["lz_complexity_logits"].mean().item()
        S = telemetry["symbiosis_score"].mean().item()
        assert (
            K > 0.3 and C > 0.35 and S > 0.5
        ), f"Step {step} telemetry floor failure"

    with cpu_autocast():
        model(input_bits)

    quantized_model = quantize_dynamic(model)
    quantized_model.eval()

    safe_output, _ = hil_safe_inference(
        quantized_model, input_bits, c_floor=0.35, s_floor=0.5
    )

    student_model, _ = collapse_submodel(
        bit_sequence_data,
        target_params=dict(
            d_model=16,
            nhead=4,
            num_layers=1,
            dim_feedforward=32,
            max_seq_len=128,
        ),
        floors={"negentropy": 0.3, "lz_complexity": 0.35, "symbiosis_score": 0.5},
    )

    compiled_model = (
        torch.compile(student_model)
        if hasattr(torch, "compile")
        else student_model
    )
    compiled_model.eval()

    with profile() as prof:
        compiled_model(input_bits)

    prof.export_chrome_trace("trace12.json")
    print("Safe output bits:", safe_output.squeeze(0).tolist())


if __name__ == "__main__":
    main()