import { Map as ImmutableMap } from 'immutable';
import {
    GROUP_CREATE_REQUEST,
    GROUP_CREATE_FAIL,
    GROUP_CREATE_SUCCESS,
    GROUP_UPDATE_REQUEST,
    GROUP_UPDATE_FAIL,
    GROUP_UPDATE_SUCCESS,
    GROUP_EDITOR_RESET,
    GROUP_EDITOR_SETUP,
    GROUP_EDITOR_VALUE_CHANGE,
} from '../actions/group_editor';

const initialState = ImmutableMap({
    groupId: null,
    isSubmitting: false,
    isChanged: false,
    title: '',
    description: '',
    coverImage: null,
});

export default function groupEditorReducer(state = initialState, action) {
    switch(action.type) {
    case GROUP_EDITOR_RESET:
        return initialState;
    case GROUP_EDITOR_SETUP:
        return state.withMutations(map => {
            map.set('groupId', action.group.get('id'));
            map.set('title', action.group.get('title'));
            map.set('description', action.group.get('description'));
            map.set('isSubmitting', false);
        });
    case GROUP_EDITOR_VALUE_CHANGE:
        return state.withMutations(map => {
            map.set(action.field, action.value);
            map.set('isChanged', true);
        });
    case GROUP_CREATE_REQUEST:
    case GROUP_UPDATE_REQUEST:
        return state.withMutations(map => {
            map.set('isSubmitting', true);
            map.set('isChanged', false);
        });
    case GROUP_CREATE_FAIL:
    case GROUP_UPDATE_FAIL:
        return state.set('isSubmitting', false);
    case GROUP_CREATE_SUCCESS:
    case GROUP_UPDATE_SUCCESS:
        return state.withMutations(map => {
            map.set('isSubmitting', false);
            map.set('groupId', action.group.id);
        });
    default:
        return state;
    }
};