import {Flag} from '../Flag';
import {FlagImpl} from './FlagImpl';
import {FlagProvider} from '../FlagProvider';
import {FlagCreationOptions} from '../FlagCreationOptions';

/**
 * An implementation of FlagProvider.
 */
export class FlagProviderImpl implements FlagProvider {

  static AUTO_CLOSE_PERIOD_MILLIS = 1;

  flagIdsToFlags: Map<string, FlagImpl> = new Map<string, FlagImpl>();

  create(options: FlagCreationOptions): Flag {
    if (options.actions) {
      options.actions.forEach((action) => {
        if (!action.executeAction) {
          throw new Error('Flag action does not have the executeAction property defined.');
        }
      });
    }
    const flag = new FlagImpl(options, () => {
      this.flagIdsToFlags.delete(flag.id);
    });
    this.flagIdsToFlags.set(flag.id, flag);
    if (options.close === 'auto') {
      setTimeout(() => {
        this.flagIdsToFlags.delete(flag.id);
      }, FlagProviderImpl.AUTO_CLOSE_PERIOD_MILLIS);
    }
    return flag;
  }

  closeFlagById(flagId: string): void {
    this.flagIdsToFlags.delete(flagId);
  }

  isFlagOpen(flagId: string): boolean {
    return this.flagIdsToFlags.get(flagId) !== undefined;
  }

}