import os
import subprocess

import pandas as pd

direction_speech = os.getenv("DIRECTION_SPEECH", "enA")
direction_text = os.getenv("DIRECTION_TEXT", "jpn")
chunk_size = int(os.getenv("CHUNK_SIZE", 10))
url = f"https://dl.fbaipublicfiles.com/seamless/data/seamless.dataset.metadata.public.{direction_speech}-{direction_text}.withduration.tsv.gz"
filename = os.path.basename(url)
subprocess.run(["wget", url, "-O", filename])
df = pd.read_csv(filename, sep='\t', header=None, dtype=str)
df.columns = ["cc_warc", "cc_sha", "cc_document_url", "cc_lineno", "paragraph_digest", "sentence_digest", "text_lid_score", "laser_score", "direction", "side", "line_no"]
df = df[df.side == direction_text]
df["cc_lineno"] = df["cc_lineno"].astype(int)
df.sort_values(by=["cc_warc", "cc_sha", "cc_document_url", "cc_lineno"], inplace=True)
batch_size = int(len(df)/chunk_size)
start = 0
end = batch_size
index = 1
while start != end:
    df.iloc[start:end].to_csv(f"seamless.dataset.metadata.public.{direction_speech}-{direction_text}.withduration.reordered.batch_{index}.tsv", sep="\t", index=False, header=False)
    index += 1
    start = end
    end += batch_size
    end = min(len(df), end)