import { HttpService } from '@nestjs/axios';
import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { lastValueFrom } from 'rxjs';
import { Action } from '../../domain/dtos/action.enum';
import { Domain } from '../../domain/dtos/domain.enum';
import { IMakeDecision } from '../../domain/interfaces/decision-maker';
import { ContextItem } from '../../domain/dtos/context-item';
import { Decision } from './decision';
import { Authorization } from '../../domain/entities/authorization';

@Injectable()
export class OpaDecisionMaker extends IMakeDecision {
  constructor(
    private readonly _configService: ConfigService,
    private readonly _httpService: HttpService,
  ) {
    super();
  }

  async decide(
    uuid: string,
    domain: Domain,
    action: Action,
    context: Array<ContextItem>,
  ): Promise<Authorization> {
    const { data } = await lastValueFrom(
      this._httpService.post<Decision>(
        this._configService.get<string>('OPA_URL') + domain + '/' + action,
        {
          input: {
            uuid,
            ...context,
          },
        },
      ),
    );
    return new Authorization(data.result.allow);
  }
}