import json
import os
import pytest
from unittest.mock import MagicMock

from doi2dataset import MetadataProcessor

@pytest.fixture
def metadata_processor():
    """Create a MetadataProcessor instance with mocked dependencies"""
    doi = "10.1038/srep45389"
    processor = MetadataProcessor(doi=doi, upload=False, progress=False)
    # Mock the console to avoid print errors
    processor.console = MagicMock()
    return processor

def test_get_publication_year_with_publication_year(metadata_processor):
    """Test that _get_publication_year extracts year from publication_year field"""
    data = {"publication_year": 2020}
    year = metadata_processor._get_publication_year(data)
    assert year == 2020

def test_get_publication_year_with_date(metadata_processor):
    """Test that _get_publication_year returns empty string when publication_year is missing"""
    data = {"publication_date": "2019-05-15"}
    year = metadata_processor._get_publication_year(data)
    assert year == ""

def test_get_publication_year_with_both_fields(metadata_processor):
    """Test that _get_publication_year prioritizes publication_year over date"""
    data = {
        "publication_year": 2020,
        "publication_date": "2019-05-15"
    }
    year = metadata_processor._get_publication_year(data)
    assert year == 2020

def test_get_publication_year_with_partial_date(metadata_processor):
    """Test that _get_publication_year returns empty string when only publication_date is present"""
    data = {"publication_date": "2018"}
    year = metadata_processor._get_publication_year(data)
    assert year == ""

def test_get_publication_year_with_missing_data(metadata_processor):
    """Test that _get_publication_year handles missing data"""
    data = {"other_field": "value"}
    year = metadata_processor._get_publication_year(data)
    assert year == ""

def test_get_publication_year_with_invalid_data(metadata_processor):
    """Test that _get_publication_year returns whatever is in publication_year field"""
    data = {
        "publication_year": "not-a-year",
        "publication_date": "invalid-date"
    }
    year = metadata_processor._get_publication_year(data)
    assert year == "not-a-year"