import gql from 'graphql-tag';

const getAppState = gql`
    query {
        state @client {
            appState {
              isDarkModeEnabled
            }
        }
    }
`;

export default (getState, writeState) => {
    return {
        Mutation: {
             updateAppState(_, appState) {
                // get current / initial state from cache
                const state = getState(getAppState);

                const newState = {
                    ...state,
                    appState: Object.assign({}, state.appState, appState),
                };

                writeState(newState);
                return newState;
            },
        }
    }
}