/**
 * External dependencies
 */
import { produce } from 'immer';

/**
 * Internal dependencies
 */
import { DEFAULT_STATE } from './constants';
import {
	DELETE_LOGS,
	IS_SEARCHING,
	SET_CURRENT_PAGE,
	SET_LOGS,
	SET_SELECTED_LOG,
	STOP_SEARCHING,
} from './actions';

/**
 * Reducer to handle state changes.
 *
 * @param {Object} state  - The current state.
 * @param {Object} action - The action object.
 * @return {Object} The new state.
 */
export default function reducer( state = DEFAULT_STATE, action ) {
	switch ( action.type ) {
		case SET_LOGS:
			return produce( state, ( draft ) => {
				draft.logs = action.data.logs;
				draft.totalPages = action.data.totalPages;
				if ( action.data.totalLogs > 0 ) {
					draft.selectedLog = action.data.logs[ 0 ];
				}
			} );
		case IS_SEARCHING:
			return produce( state, ( draft ) => {
				draft.isSearching = true;
			} );
		case STOP_SEARCHING:
			return produce( state, ( draft ) => {
				draft.isSearching = false;
			} );
		case DELETE_LOGS:
			return state;
		case SET_SELECTED_LOG:
			return produce( state, ( draft ) => {
				draft.selectedLog = action.log;
			} );
		case SET_CURRENT_PAGE:
			return produce( state, ( draft ) => {
				draft.currentPage = action.page;
			} );
		default:
			return state;
	}
}