"""CBC example using the Iris dataset."""

import prototorch as pt
import pytorch_lightning as pl
import torch

if __name__ == "__main__":
    # Dataset
    train_ds = pt.datasets.Iris(dims=[0, 2])

    # Reproducibility
    pl.utilities.seed.seed_everything(seed=3)

    # Dataloaders
    train_loader = torch.utils.data.DataLoader(train_ds,
                                               num_workers=0,
                                               batch_size=150)

    # Hyperparameters
    hparams = dict(
        distribution=[3, 2, 2],
        proto_lr=0.01,
        bb_lr=0.01,
    )

    # Initialize the model
    model = pt.models.CBC(
        hparams,
        prototype_initializer=pt.components.SSI(train_ds, noise=0.01),
    )

    # Callbacks
    dvis = pt.models.VisCBC2D(data=train_ds,
                              title="CBC Iris Example",
                              resolution=300,
                              axis_off=True)

    # Setup trainer
    trainer = pl.Trainer(
        gpus=0,
        max_epochs=200,
        callbacks=[
            dvis,
        ],
    )

    # Training loop
    trainer.fit(model, train_loader)