const Immutable = require('immutable');

import * as BoardActions from '../../actions/board/board.actions';
import Values from '../Values';
import { SETTINGS } from '../../App';

const initial = {
    level: -1,
    values: [],
    title: 'Setting up...'
};

const count = SETTINGS.GRID_WIDTH * SETTINGS.GRID_HEIGHT;

const reducer = (state = initial, action) => {
    if (action.type !== BoardActions.BOARD_ACTION) {
        return state;
    }

    switch (action.action) {
        case BoardActions.UPDATE:
            return Immutable.fromJS(state).setIn(['values', action.index, 'value'], action.value).toJS();

        case BoardActions.SHOW:
            return Immutable.fromJS(state).setIn(['values', action.index, 'show'], true).toJS();

        case BoardActions.HIDE:
            return Immutable.fromJS(state).setIn(['values', action.index, 'show'], false).toJS();

        case BoardActions.NEXT_LEVEL:
            const lvl = state.level + 1;
            return Immutable.Map(state)
                .set('level', lvl)
                .set('title', Values.getDescription(lvl))
                .set('values', Values.generate(count, lvl))
                .toObject();
    }

    return state;
};

export default reducer;