import {InitializerMetadata} from './InitializerMetadata';
import {DependencyRegistry} from '../di/DependencyRegistry';
import {Klass} from '../core/Klass';

export class InitializerRegistry {

  private static _initializers: Map<Function, InitializerMetadata> = new Map();

  public static initializers = InitializerRegistry._initializers;

  public static registerInitializer(type: Function) {
    DependencyRegistry.registerComponent(type as Klass);
    this.getInitializer(type);
  }

  public static getInitializers() {

    const result: any[] = [];

    this._initializers.forEach(initializer => result.push(initializer));

    return result;
  }

  public static getInitializer(type: Function) {

    let initializerMetadata = this._initializers.get(type);

    if (typeof initializerMetadata === 'undefined') {
      initializerMetadata = new InitializerMetadata(type);
      this._initializers.set(type, initializerMetadata);
    }

    return initializerMetadata;
  }
}