from datasets import load_dataset


def test_streaming_dataset():
    datasets = load_dataset("./ccmatrix.py", lang1="nl", lang2="en", streaming=True)
    assert list(datasets.keys()) == ["train"]

    train_ds = datasets["train"]

    i = iter(train_ds)
    e = next(i)

    assert e == {
        "id": 0,
        "score": 1.2499677,
        "translation": {
            "nl": "Zij kwamen uit alle delen van Egypte, evenals zij op de dag van Zijn komst zullen doen.",
            "en": "They come from all parts of Egypt, just like they will at the day of His coming.",
        },
    }

    e = next(i)

    assert list(e.keys()) == ["id", "score", "translation"]

    assert e == {
        "id": 1,
        "score": 1.2498379,
        "translation": {
            "nl": "En we moeten elke waarheid vals noemen die niet minstens door een lach vergezeld ging.”",
            "en": 'And we should call every truth false which was not accompanied by at least one laugh."',
        },
    }


def test_streaming_dataset_2():
    datasets = load_dataset("./ccmatrix.py", "nl-en", streaming=True)
    assert list(datasets.keys()) == ["train"]

    train_ds = datasets["train"]

    i = iter(train_ds)
    e = next(i)

    assert e == {
        "id": 0,
        "score": 1.2499677,
        "translation": {
            "nl": "Zij kwamen uit alle delen van Egypte, evenals zij op de dag van Zijn komst zullen doen.",
            "en": "They come from all parts of Egypt, just like they will at the day of His coming.",
        },
    }

    e = next(i)

    assert list(e.keys()) == ["id", "score", "translation"]

    assert e == {
        "id": 1,
        "score": 1.2498379,
        "translation": {
            "nl": "En we moeten elke waarheid vals noemen die niet minstens door een lach vergezeld ging.”",
            "en": 'And we should call every truth false which was not accompanied by at least one laugh."',
        },
    }


def test_small_config():
    datasets = load_dataset("./ccmatrix.py", "nl-en-1000_000")
    assert list(datasets.keys()) == ["train"]

    train_ds = datasets["train"]
    assert len(train_ds) == 1000000

    i = iter(train_ds)
    e = next(i)

    assert e == {
        "id": 0,
        "score": 1.2499676942825317,
        "translation": {
            "nl": "Zij kwamen uit alle delen van Egypte, evenals zij op de dag van Zijn komst zullen doen.",
            "en": "They come from all parts of Egypt, just like they will at the day of His coming.",
        },
    }

    e = next(i)

    assert list(e.keys()) == ["id", "score", "translation"]

    assert e == {
        "id": 1,
        "score": 1.249837875366211,
        "translation": {
            "nl": "En we moeten elke waarheid vals noemen die niet minstens door een lach vergezeld ging.”",
            "en": 'And we should call every truth false which was not accompanied by at least one laugh."',
        },
    }


def test_medium_config():
    datasets = load_dataset("./ccmatrix.py", "nl-en-25_000_000", streaming=True)
    assert list(datasets.keys()) == ["train"]

    train_ds = datasets["train"]

    i = iter(train_ds)
    e = next(i)