# Copyright 2025 Google LLC.
#
# 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.

"""Tests for langextract.io module."""

import pathlib
import tempfile
import unittest
from unittest import mock

import requests

from langextract import io
from langextract.core import data


class _ClosingTracker:

  def __init__(self):
    self.closed = False
    self.updates = []

  def update(self, value):
    self.updates.append(value)

  def close(self):
    self.closed = True


class IoTest(unittest.TestCase):

  def test_save_annotated_documents_closes_progress_bar_on_generator_error(
      self,
  ):
    tracker = _ClosingTracker()

    def annotated_documents():
      yield data.AnnotatedDocument(
          document_id='doc-1', text='hello', extractions=[]
      )
      raise RuntimeError('boom')

    with tempfile.TemporaryDirectory() as tmpdir:
      with mock.patch(
          'langextract.io.progress.create_save_progress_bar',
          return_value=tracker,
      ):
        with self.assertRaisesRegex(RuntimeError, 'boom'):
          io.save_annotated_documents(
              annotated_documents(),
              output_dir=pathlib.Path(tmpdir),
              show_progress=True,
          )

    self.assertTrue(tracker.closed)
    self.assertEqual(tracker.updates, [1])

  def test_download_text_from_url_closes_progress_bar_on_stream_error(self):
    tracker = _ClosingTracker()
    response = mock.MagicMock()
    response.__enter__.return_value = response
    response.__exit__.return_value = False
    response.headers = {
        'Content-Type': 'text/plain',
        'Content-Length': '10',
    }
    response.raise_for_status.return_value = None

    def broken_iter_content(*, chunk_size):
      del chunk_size
      yield b'hello'
      raise requests.RequestException('connection reset')

    response.iter_content.side_effect = broken_iter_content

    with mock.patch('langextract.io.requests.get', return_value=response):
      with mock.patch(
          'langextract.io.progress.create_download_progress_bar',
          return_value=tracker,
      ):
        with self.assertRaisesRegex(
            requests.RequestException, 'connection reset'
        ):
          io.download_text_from_url('https://example.com/file.txt')

    self.assertTrue(tracker.closed)
    self.assertEqual(tracker.updates, [5])


if __name__ == '__main__':
  unittest.main()