"""
Embed DNA sequences from ReMap peaks.
"""

from .utils import pad_token_embeddings, embed_and_save
from dpacman.data_tasks.embeddings import get_embedder

import os
import torch
import json
import pandas as pd
from pathlib import Path
from omegaconf import DictConfig
import rootutils
from dpacman.utils import pylogger

root = rootutils.setup_root(__file__, indicator=".project-root", pythonpath=True)
logger = pylogger.RankedLogger(__name__, rank_zero_only=True)


def main(cfg: DictConfig):
    logger.info(
        f"Making embeddings using {cfg.data_task.chrom_model} for dna sequences at {cfg.data_task.input_file}"
    )
    # make out dir if necessary
    out_dir = Path(root) / cfg.data_task.out_dir
    os.makedirs(out_dir, exist_ok=True)

    # set device
    device = "cpu"
    if cfg.data_task.device == "gpu":
        if torch.cuda.is_available():
            device = "cuda"
    logger.info(f"Using device: {device}")

    # read the input file
    input_file = Path(root) / cfg.data_task.input_file
    if str(input_file).endswith(".json"):
        # load the json and isolate the sequences and ids
        with open(input_file, "r") as f:
            d = json.load(f)

        df = pd.DataFrame.from_dict(d, orient="index").reset_index()
        df.columns = ["seq_id", "sequence"]

    if cfg.data_task.debug:
        logger.info(f"DEBUG MODE. Only embedding 5 sequences")
        df = df.sample(n=5, random_state=42).reset_index(drop=True)

    # crucial: sort by SIZE so that we are padding things in a way that will support pre-batching
    df["sequence_length"] = df["sequence"].str.len()
    df = df.sort_values(by="sequence_length", ascending=True).reset_index(drop=True)

    # turn into list of sequences and IDs
    peak_seqs = df["sequence"].tolist()
    peak_ids = df["seq_id"].tolist()
    logger.info(
        f"Embedding {len(peak_seqs)} binding peak sequences from processed remap data"
    )

    # Get the DNA embedder
    dna_embedder = get_embedder(cfg.data_task.chrom_model, device, for_dna=True)
    logger.info(f"Device of embedding model: {dna_embedder.device}")
    out_peaks = str(out_dir / f"peaks_{cfg.data_task.chrom_model}.pkl")
    if cfg.data_task.debug:
        out_peaks = out_peaks.replace(".pkl", "_debug.pkl")

    embed_and_save(
        peak_seqs,
        peak_ids,
        dna_embedder,
        out_peaks,
        batch_size=cfg.data_task.batch_size,
    )

    logger.info(f"Finished embedding DNA sequences. Saved to: {out_peaks}")


if __name__ == "__main__":
    main()