import pytest
from unittest.mock import patch, Mock
from app.models import Message
from app.processing import process_pdf, read_text_file, process_file, process_text_input, parse_message

def test_read_text_file_error():
    with patch("builtins.open", side_effect=IOError("File read error")):
        with pytest.raises(ValueError, match="Error reading text file: File read error"):
            read_text_file("test.txt")

# Test for process_file function
# def test_process_file_pdf(pipeline):
#     mock_file = Mock()
#     mock_file.name = "test.pdf"

#     with patch('app.processing.process_pdf', return_value="PDF content"):
#         result = process_file(mock_file, "json", pipeline)
#         pipeline.generate_flashcards.assert_called_once_with("json", "PDF content")
#         assert result == '{"flashcards": []}'

# def test_process_file_txt(pipeline):
#     mock_file = Mock()
#     mock_file.name = "test.txt"

#     with patch('app.processing.read_text_file', return_value="Text content"):
#         result = process_file(mock_file, "json", pipeline)
#         pipeline.generate_flashcards.assert_called_once_with("json", "Text content")
#         assert result == '{"flashcards": []}'

def test_process_file_unsupported():
    mock_file = Mock()
    mock_file.name = "test.unsupported"

    with pytest.raises(ValueError, match="Unsupported file type."):
        process_file(mock_file, "json", None)

# Ensure the pipeline fixture is used in all tests that require it
# @pytest.mark.usefixtures("pipeline")
# class TestWithPipeline:
#     def test_pipeline_usage(self, pipeline):
#         assert pipeline.generate_flashcards.return_value == '{"flashcards": []}'

# Tests for parse_message function
def test_parse_message_valid_input():
    input_dict = {
        "role": "assistant",
        "content": '[{"question": "Q1", "answer": "A1"}, {"question": "Q2", "answer": "A2"}]'
    }
    message = parse_message(input_dict)
    assert isinstance(message, Message)
    assert message.role == "assistant"
    assert len(message.content) == 2

def test_parse_message_invalid_json():
    input_dict = {
        "role": "assistant",
        "content": 'Invalid JSON'
    }
    with pytest.raises(ValueError, match="Invalid JSON in content"):
        parse_message(input_dict)

def test_parse_message_missing_key():
    input_dict = {
        "content": '[{"question": "Q", "answer": "A"}]'
    }
    with pytest.raises(ValueError, match="Missing required key"):
        parse_message(input_dict)