import { Container } from 'container-ioc';

/*
    If a container can't find a value within itself, it will look it up in ascendant containers.
    There a 3 ways to set a parent for a container:
 */

const grandParentContainer = new Container();

// 1.
const parentContainer = grandParentContainer.createChild();

// 2.
const childContainer = new Container();
childContainer.setParent(parentContainer);

// 3.
const deepNestedContainer = new Container({
    parent: childContainer
});

grandParentContainer.register([
    { token: 'IConfig', useValue: {}}
]);

deepNestedContainer.resolve('IConfig');

import { Container, LifeTime, Injectable } from 'container-ioc';

/*
    By default, containers resolve singletons when using useClass and useFactory.
    Default life time for all items in a container can be set by passing an option object to it's contructor with **defailtLifeTime** attribute.
    Possible values: LifeTime.PerRequest (resolves instances) and LifeTime.Persistent (resolves singletons);
*/
const container = new Container({
    defaultLifeTime: LifeTime.PerRequest
});

/*
    You can also specify life time individually for each item in a container by specifying lifeTime attribute.
*/
@Injectable()
class ServiceA {}

/* With classes */
container.register([
    {
        token: 'ISerivceA',
        useClass: ServiceA,
        lifeTime: LifeTime.PerRequest
    }
]);

/* With factories */
container.register([
    {
        token: 'IServiceB',
        useFactory: () => {

import { Container, Injectable } from 'container-ioc';

interface IService {
    [key: string]: any;
}

const TSerivice = Symbol('IService');

@Injectable([TSerivice])
class App {
    constructor(private service: IService) {}
}

const container = new Container();

container.register([
    { token: App, useClass: App },
    { token: TSerivice, useValue: {}}
]);

const app = container.resolve(App);

import { Container } from 'container-ioc';

const container = new Container();

container.register([
    { token: 'IConfig', useValue: {}}
]);

const app = container.resolve('IConfig');