"""Builds corpus based on the alignment."""
import polars as pl

with open("raw/europarl-v7.da-en.da") as in_file:
    danish_texts = pl.Series(list(in_file))

with open("raw/europarl-v7.da-en.en") as in_file:
    english_texts = pl.Series(list(in_file))

with open("raw/europarl-v7.sv-en.sv") as in_file:
    swedish_texts = pl.Series(list(in_file))

alignment = pl.read_parquet("filtered_alignment.parquet")

corpus = pl.DataFrame(
    dict(
        da=danish_texts.take(alignment["da_id"]),
        en=english_texts.take(alignment["da_id"]),
        sv=swedish_texts.take(alignment["sv_id"]),
    )
)

corpus.write_parquet("corpus.parquet")