/**
 * External dependencies
 */
import type { AnyAction } from '@nab/types';

/**
 * Internal dependencies
 */
import { INIT_STATE } from '../config';
import type { State as FullState } from '../types';
import type { ReusableEntityAction as Action } from '../actions/reusable-entities';

type State = FullState[ 'reusableEntities' ];

export function reusableEntities(
	state = INIT_STATE.reusableEntities,
	action: AnyAction
): State {
	return actualReducer( state, action as Action ) ?? state;
}

function actualReducer( state: State, action: Action ): State {
	switch ( action.type ) {
		case 'MARK_AS_SAVING_REUSABLE_ENTITIES':
			return {
				...state,
				isSavingEntities: action.isSaving,
			};

		case 'RECEIVE_REUSABLE_GOALS':
			return {
				...state,
				goals: action.reusableGoals,
			};

		case 'RECEIVE_REUSABLE_SEGMENTS':
			return {
				...state,
				segments: action.reusableSegments,
			};
	}
}