import json
import os
import tempfile
from unittest.mock import patch
import pytest

from time_tracker.core.config import load_config, save_config


def test_load_config_creates_default_if_not_exists():
    """ creates default when file doesn't exist"""
    with tempfile.NamedTemporaryFile(suffix='.json', delete=False) as tmp:
        tmp_path = tmp.name

    # Remove the file so it doesn't exist
    os.unlink(tmp_path)

    # Mock the config file path
    with patch('time_tracker.core.config.CONFIG_FILE', tmp_path):
        config = load_config()

        # Check default values
        assert config['tracking_enabled'] is True
        # Updated to match actual defaults
        expected_work_apps = ['PyCharm', 'VS Code', 'Visual Studio', 'Sublime Text', 'Atom', 'IntelliJ IDEA']
        assert config['window_rules']['work'] == expected_work_apps
        expected_distraction_apps = ['YouTube', 'Twitter', 'Facebook', 'Instagram', 'TikTok', 'Discord', 'Slack']
        assert config['window_rules']['distraction'] == expected_distraction_apps
        assert config.get('current_task_id') is None

        # Verify file was created
        assert os.path.exists(tmp_path)


def test_save_and_load_config():
    """Test saving and loading config preserves data"""
    with tempfile.NamedTemporaryFile(suffix='.json', delete=False) as tmp:
        tmp_path = tmp.name

    # Clean up after ourselves
    if os.path.exists(tmp_path):
        os.unlink(tmp_path)

    test_config = {
        'tracking_enabled': False,
        'current_task_id': 'TEST-123',
        'window_rules': {
            'work': ['Editor'],
            'distraction': ['Social Media']
        }
    }

    # Mock the config file path
    with patch('time_tracker.core.config.CONFIG_FILE', tmp_path):
        save_config(test_config)
        loaded_config = load_config()

        assert loaded_config['tracking_enabled'] == False
        assert loaded_config['current_task_id'] == 'TEST-123'
        assert loaded_config['window_rules']['work'] == ['Editor']
        assert loaded_config['window_rules']['distraction'] == ['Social Media']


def test_load_config_preserves_existing_values():
    """Test that loading config doesn't overwrite existing values unnecessarily"""
    with tempfile.NamedTemporaryFile(mode='w', suffix='.json', delete=False) as tmp:
        initial_config = {
            'tracking_enabled': True,
            'current_task_id': 'EXISTING-123',
            'window_rules': {
                'work': ['Custom Editor'],
                'distraction': ['Gaming App']
            }
        }
        json.dump(initial_config, tmp)
        tmp_path = tmp.name

    # Mock the config file path
    with patch('time_tracker.core.config.CONFIG_FILE', tmp_path):
        loaded_config = load_config()

        assert loaded_config['tracking_enabled'] == True
        assert loaded_config['current_task_id'] == 'EXISTING-123'
        assert loaded_config['window_rules']['work'] == ['Custom Editor']
        assert loaded_config['window_rules']['distraction'] == ['Gaming App']