#
#  Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.
#

from __future__ import annotations

import warnings

with warnings.catch_warnings():
    warnings.filterwarnings("ignore", message=".*pkg_resources is deprecated.*", category=UserWarning)
    import pkg_resources  # noqa: F401 - stabilize xgboost import during collection

import pytest

from rag.app import qa


def _noop_callback(*_args, **_kwargs):
    pass


@pytest.fixture(autouse=True)
def _stub_rag_tokenizer(monkeypatch):
    def fake_tokenize(text):
        return str(text)

    monkeypatch.setattr("rag.nlp.rag_tokenizer.tokenize", fake_tokenize)
    monkeypatch.setattr("rag.nlp.rag_tokenizer.fine_grained_tokenize", fake_tokenize)


@pytest.mark.p2
def test_csv_final_pair_uses_last_line_number():
    chunks = qa.chunk(
        "qa.csv",
        binary=b"Question 1,Answer 1\nQuestion 2,Answer 2",
        lang="English",
        callback=_noop_callback,
    )

    assert len(chunks) == 2
    assert chunks[0]["top_int"] == [1]
    assert chunks[1]["top_int"] == [2]


@pytest.mark.p2
def test_csv_quoted_comma_stays_in_one_field():
    chunks = qa.chunk(
        "qa.csv",
        binary=b'"Question, one",Answer 1\nQuestion 2,Answer 2',
        lang="English",
        callback=_noop_callback,
    )

    assert len(chunks) == 2
    assert chunks[0]["content_with_weight"] == "Question: Question, one\tAnswer: 1"


@pytest.mark.p2
def test_csv_quoted_field_preserves_embedded_newline():
    chunks = qa.chunk(
        "qa.csv",
        binary=b'"first line\nsecond line",some answer\n',
        lang="English",
        callback=_noop_callback,
    )

    assert len(chunks) == 1
    assert chunks[0]["content_with_weight"] == "Question: first line\nsecond line\tAnswer: some answer"


@pytest.mark.p2
def test_csv_multiline_quote_uses_physical_continuation_line():
    chunks = qa.chunk(
        "qa.csv",
        binary=b'first,one\n"second\nquestion",two\ntwo continued\nthird,three',
        lang="English",
        callback=_noop_callback,
    )

    assert len(chunks) == 3
    assert chunks[1]["content_with_weight"] == "Question: second\nquestion\tAnswer: two\ntwo continued"