"""
Tests for enhanced error handling system
"""

import pytest
from flask import jsonify
from app import db
from app.models import User
from app.utils.error_handlers import get_user_friendly_message, register_error_handlers


@pytest.mark.unit
@pytest.mark.error_handling
def test_user_friendly_message_404():
    """Test that 404 error has user-friendly message"""
    message = get_user_friendly_message(404)
    assert message is not None
    assert 'title' in message
    assert 'message' in message
    assert 'recovery' in message
    assert message['title'] == 'Page Not Found'
    assert 'not found' in message['message'].lower()


@pytest.mark.unit
@pytest.mark.error_handling
def test_user_friendly_message_500():
    """Test that 500 error has user-friendly message"""
    message = get_user_friendly_message(500)
    assert message is not None
    assert message['title'] == 'Server Error'
    assert 'server error' in message['message'].lower() or 'error occurred' in message['message'].lower()


@pytest.mark.unit
@pytest.mark.error_handling
def test_user_friendly_message_401():
    """Test that 401 error has user-friendly message"""
    message = get_user_friendly_message(401)
    assert message is not None
    assert message['title'] == 'Authentication Required'
    assert 'log in' in message['message'].lower() or 'login' in message['message'].lower()


@pytest.mark.unit
@pytest.mark.error_handling
def test_user_friendly_message_403():
    """Test that 403 error has user-friendly message"""
    message = get_user_friendly_message(403)
    assert message is not None
    assert message['title'] == 'Access Denied'
    assert 'permission' in message['message'].lower() or 'access' in message['message'].lower()


@pytest.mark.unit
@pytest.mark.error_handling
def test_user_friendly_message_unknown_status():
    """Test that unknown status codes have fallback message"""
    message = get_user_friendly_message(999)
    assert message is not None
    assert 'title' in message
    assert 'message' in message
    assert 'recovery' in message


@pytest.mark.unit
@pytest.mark.error_handling
def test_user_friendly_message_with_description():
    """Test that error messages can include custom descriptions"""
    message = get_user_friendly_message(400, 'Custom error description')
    assert message is not None
    assert 'Custom error description' in message['message']


@pytest.mark.unit
@pytest.mark.error_handling
def test_recovery_options_include_dashboard():
    """Test that recovery options include dashboard"""
    message = get_user_friendly_message(404)
    assert 'Go to Dashboard' in message['recovery']


@pytest.mark.unit
@pytest.mark.error_handling
def test_error_handling_enhanced_file_exists():
    """Test that error handling enhanced file exists"""
    import os
    error_file = os.path.join(
        os.path.dirname(os.path.dirname(__file__)),
        'app', 'static', 'error-handling-enhanced.js'
    )
    assert os.path.exists(error_file), "Error handling enhanced file should exist"


@pytest.mark.unit
@pytest.mark.error_handling
def test_error_handling_retry_functionality():
    """Test that retry functionality is implemented"""
    import os
    error_file = os.path.join(
        os.path.dirname(os.path.dirname(__file__)),
        'app', 'static', 'error-handling-enhanced.js'
    )
    if os.path.exists(error_file):
        with open(error_file, 'r', encoding='utf-8') as f:
            content = f.read()
            assert 'retryFetch' in content, "Retry functionality should be implemented"
            assert 'showErrorWithRetry' in content, "Retry button should be shown"


@pytest.mark.unit
@pytest.mark.error_handling
def test_offline_queue_functionality():
    """Test that offline queue functionality is implemented"""
    import os
    error_file = os.path.join(
        os.path.dirname(os.path.dirname(__file__)),
        'app', 'static', 'error-handling-enhanced.js'
    )
    if os.path.exists(error_file):
        with open(error_file, 'r', encoding='utf-8') as f:
            content = f.read()
            assert 'queueForOffline' in content, "Offline queue should be implemented"
            assert 'processOfflineQueue' in content, "Offline queue processing should exist"


@pytest.mark.unit
@pytest.mark.error_handling
def test_graceful_degradation():
    """Test that graceful degradation is implemented"""
    import os
    error_file = os.path.join(
        os.path.dirname(os.path.dirname(__file__)),
        'app', 'static', 'error-handling-enhanced.js'
    )
    if os.path.exists(error_file):
        with open(error_file, 'r', encoding='utf-8') as f:
            content = f.read()
            assert 'setupGracefulDegradation' in content, "Graceful degradation should be implemented"
            assert 'checkRequiredFeatures' in content, "Feature checking should exist"


@pytest.mark.unit
@pytest.mark.error_handling
def test_error_handling_js_loaded(authenticated_client):
    """Test that error handling JavaScript is loaded in base template"""
    response = authenticated_client.get('/dashboard')
    assert response.status_code == 200
    # Check that error-handling-enhanced.js is included
    assert b'error-handling-enhanced.js' in response.data


@pytest.mark.unit
@pytest.mark.error_handling
def test_api_health_endpoint(client):
    """Test that API health endpoint exists"""
    response = client.get('/api/health')
    assert response.status_code == 200
    data = response.get_json()
    assert data is not None
    assert 'status' in data
    assert data['status'] == 'ok'


@pytest.mark.unit
@pytest.mark.error_handling
def test_error_handlers_registered(app):
    """Test that error handlers are registered"""
    # Error handlers should be registered during app creation
    assert app is not None
    # Check that error handlers are callable
    with app.app_context():
        message = get_user_friendly_message(404)
        assert message is not None


@pytest.mark.smoke
@pytest.mark.error_handling
def test_error_template_updates(client):
    """Smoke test: Verify error templates have retry buttons"""
    # Test 404 page
    response = client.get('/nonexistent-page')
    assert response.status_code == 404
    html = response.data.decode('utf-8')
    # Should have retry/recovery options
    assert 'Go to Dashboard' in html or 'Go Back' in html


@pytest.mark.unit
@pytest.mark.error_handling
def test_error_handling_network_monitoring():
    """Test that network monitoring is implemented"""
    import os
    error_file = os.path.join(
        os.path.dirname(os.path.dirname(__file__)),
        'app', 'static', 'error-handling-enhanced.js'
    )
    if os.path.exists(error_file):
        with open(error_file, 'r', encoding='utf-8') as f:
            content = f.read()
            assert 'setupNetworkMonitoring' in content, "Network monitoring should be implemented"
            assert 'checkOnlineStatus' in content, "Online status checking should exist"


@pytest.mark.unit
@pytest.mark.error_handling
def test_error_handling_offline_indicator():
    """Test that offline indicator is implemented"""
    import os
    error_file = os.path.join(
        os.path.dirname(os.path.dirname(__file__)),
        'app', 'static', 'error-handling-enhanced.js'
    )
    if os.path.exists(error_file):
        with open(error_file, 'r', encoding='utf-8') as f:
            content = f.read()
            assert 'showOfflineIndicator' in content, "Offline indicator should be implemented"
            assert 'offline-indicator' in content, "Offline indicator element should exist"


@pytest.mark.unit
@pytest.mark.error_handling
def test_error_handling_recovery_options():
    """Test that recovery options are implemented"""
    import os
    error_file = os.path.join(
        os.path.dirname(os.path.dirname(__file__)),
        'app', 'static', 'error-handling-enhanced.js'
    )
    if os.path.exists(error_file):
        with open(error_file, 'r', encoding='utf-8') as f:
            content = f.read()
            assert 'getRecoveryOptions' in content, "Recovery options should be implemented"
            assert 'error-recovery-btn' in content, "Recovery buttons should exist"