"""
Tests for user management module (Admin only)
"""
import pytest
import json
from app import db
from app.models import User


@pytest.fixture
def admin_user(app):
    """Create an admin user"""
    with app.app_context():
        user = User(
            username='adminuser',
            email='admin@example.com',
            role='admin'
        )
        user.set_password('adminpassword123')
        db.session.add(user)
        db.session.commit()
        
        return {
            'id': user.id,
            'username': user.username,
            'email': user.email,
            'role': user.role
        }


@pytest.fixture
def admin_token(client, admin_user):
    """Get admin token for authenticated requests"""
    response = client.post('/api/auth/login',
        data=json.dumps({
            'username': 'adminuser',
            'password': 'adminpassword123'
        }),
        content_type='application/json'
    )
    return json.loads(response.data)['token']


@pytest.fixture
def regular_user(app):
    """Create a regular user"""
    with app.app_context():
        user = User(
            username='regularuser',
            email='regular@example.com',
            role='user'
        )
        user.set_password('regularpassword123')
        db.session.add(user)
        db.session.commit()
        
        return {
            'id': user.id,
            'username': user.username,
            'email': user.email,
            'role': user.role
        }


class TestGetUsers:
    """Tests for GET /api/users endpoint"""
    
    def test_get_users_success(self, client, admin_token, admin_user):
        """Test admin can get users list"""
        response = client.get('/api/users',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 200
        data = json.loads(response.data)
        assert 'data' in data
        assert 'pagination' in data
        assert len(data['data']) >= 1
    
    def test_get_users_pagination(self, client, admin_token, admin_user):
        """Test pagination parameters"""
        response = client.get('/api/users?page=1&page_size=10',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 200
        data = json.loads(response.data)
        assert data['pagination']['page'] == 1
        assert data['pagination']['page_size'] == 10
    
    def test_get_users_search(self, client, admin_token, admin_user):
        """Test search functionality"""
        response = client.get('/api/users?search=admin',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 200
        data = json.loads(response.data)
        assert len(data['data']) >= 1
        assert 'admin' in data['data'][0]['username'].lower() or 'admin' in data['data'][0]['email'].lower()
    
    def test_get_users_unauthorized(self, client, regular_user):
        """Test regular user cannot access users list"""
        # Login as regular user
        login_response = client.post('/api/auth/login',
            data=json.dumps({
                'username': 'regularuser',
                'password': 'regularpassword123'
            }),
            content_type='application/json'
        )
        token = json.loads(login_response.data)['token']
        
        response = client.get('/api/users',
            headers={'Authorization': f'Bearer {token}'}
        )
        
        assert response.status_code == 403


class TestCreateUser:
    """Tests for POST /api/users/create endpoint"""
    
    def test_create_user_success(self, client, admin_token):
        """Test admin can create a new user"""
        response = client.post('/api/users/create',
            data=json.dumps({
                'username': 'newuser',
                'password': 'newpassword123',
                'email': 'newuser@example.com',
                'role': 'user'
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 201
        data = json.loads(response.data)
        assert data['username'] == 'newuser'
        assert data['email'] == 'newuser@example.com'
        assert data['role'] == 'user'
    
    def test_create_user_missing_fields(self, client, admin_token):
        """Test create user with missing required fields"""
        response = client.post('/api/users/create',
            data=json.dumps({
                'username': 'newuser'
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 400
        data = json.loads(response.data)
        assert 'error' in data
    
    def test_create_user_duplicate_username(self, client, admin_token, admin_user):
        """Test create user with duplicate username"""
        response = client.post('/api/users/create',
            data=json.dumps({
                'username': 'adminuser',
                'password': 'password123',
                'email': 'another@example.com',
                'role': 'user'
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 400
        data = json.loads(response.data)
        assert 'error' in data
    
    def test_create_user_invalid_role(self, client, admin_token):
        """Test create user with invalid role"""
        response = client.post('/api/users/create',
            data=json.dumps({
                'username': 'newuser',
                'password': 'password123',
                'email': 'newuser@example.com',
                'role': 'invalid_role'
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 400


class TestUpdateUser:
    """Tests for POST /api/users/update endpoint"""
    
    def test_update_user_success(self, client, admin_token, regular_user):
        """Test admin can update a user"""
        response = client.post('/api/users/update',
            data=json.dumps({
                'id': regular_user['id'],
                'email': 'updated@example.com'
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 200
        data = json.loads(response.data)
        assert data['email'] == 'updated@example.com'
    
    def test_update_user_not_found(self, client, admin_token):
        """Test update non-existent user"""
        response = client.post('/api/users/update',
            data=json.dumps({
                'id': 99999,
                'email': 'updated@example.com'
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 404
    
    def test_update_user_self_deactivation(self, client, admin_token, admin_user):
        """Test admin cannot deactivate themselves"""
        response = client.post('/api/users/update',
            data=json.dumps({
                'id': admin_user['id'],
                'is_active': False
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 400


class TestDeleteUser:
    """Tests for POST /api/users/delete endpoint"""
    
    def test_delete_user_success(self, client, admin_token, regular_user):
        """Test admin can delete a user"""
        response = client.post('/api/users/delete',
            data=json.dumps({
                'id': regular_user['id']
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 200
        data = json.loads(response.data)
        assert 'message' in data
    
    def test_delete_user_not_found(self, client, admin_token):
        """Test delete non-existent user"""
        response = client.post('/api/users/delete',
            data=json.dumps({
                'id': 99999
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 404
    
    def test_delete_user_self_deletion(self, client, admin_token, admin_user):
        """Test admin cannot delete themselves"""
        response = client.post('/api/users/delete',
            data=json.dumps({
                'id': admin_user['id']
            }),
            content_type='application/json',
            headers={'Authorization': f'Bearer {admin_token}'}
        )
        
        assert response.status_code == 400