import hashlib
import json
from unittest.mock import MagicMock, Mock, patch

import pytest

from embedchain.loaders.youtube_video import YoutubeVideoLoader


@pytest.fixture
def youtube_video_loader():
    return YoutubeVideoLoader()


def test_load_data(youtube_video_loader):
    video_url = "https://www.youtube.com/watch?v=VIDEO_ID"
    mock_loader = Mock()
    mock_page_content = "This is a YouTube video content."
    mock_loader.load.return_value = [
        MagicMock(
            page_content=mock_page_content,
            metadata={"url": video_url, "title": "Test Video"},
        )
    ]

    mock_transcript = [{"text": "sample text", "start": 0.0, "duration": 5.0}]

    with patch("embedchain.loaders.youtube_video.YoutubeLoader.from_youtube_url", return_value=mock_loader), patch(
        "embedchain.loaders.youtube_video.YouTubeTranscriptApi.get_transcript", return_value=mock_transcript
    ):
        result = youtube_video_loader.load_data(video_url)

    expected_doc_id = hashlib.sha256((mock_page_content + video_url).encode()).hexdigest()

    assert result["doc_id"] == expected_doc_id

    expected_data = [
        {
            "content": "This is a YouTube video content.",
            "meta_data": {
                "url": video_url,
                "title": "Test Video",
                "transcript": json.dumps(mock_transcript, ensure_ascii=True),
            },
        }
    ]

    assert result["data"] == expected_data


def test_load_data_with_empty_doc(youtube_video_loader):
    video_url = "https://www.youtube.com/watch?v=VIDEO_ID"
    mock_loader = Mock()
    mock_loader.load.return_value = []

    with patch("embedchain.loaders.youtube_video.YoutubeLoader.from_youtube_url", return_value=mock_loader):
        with pytest.raises(ValueError):
            youtube_video_loader.load_data(video_url)