import { LoopDocumentState, initialState } from '../states/loop-document.state';
import { Actions, ActionTypes } from '../actions/loop-document.action';
import { LoopDocument } from '../interfaces/loop-document.interface';

export function reducer(
    state: LoopDocumentState = initialState,
    action: Actions
): LoopDocumentState {
    switch (action.type) {
        case ActionTypes.QUERY:
            return (<any>Object).assign({}, state, {
                entries: [...state.entries, ...action.payload]
            });
        case ActionTypes.ADD_SELECTED:
            return (<any>Object).assign({}, state, {
                selectedEntries: [...state.selectedEntries, ...action.payload]
            });
        case ActionTypes.REMOVE_SELECTED:
            return (<any>Object).assign({}, state, {
                selectedEntries: state.selectedEntries.filter((value: LoopDocument) => {
                    return (action.payload.indexOf(value) === -1);
                })
            });
        case ActionTypes.SET_ENTRIES:
            return (<any>Object).assign({}, state, {
                entries: action.payload
            });
        case ActionTypes.SET_SELECTED:
            return (<any>Object).assign({}, state, {
                selectedEntries: action.payload
            });
        default:
            return state;
    }
}