/*
 * © 2021 Thoughtworks, Inc.
 */

import { Cost } from './cost'
import {
  ICloudService,
  FootprintEstimate,
  CloudConstants,
  CloudConstantsEmissionsFactors,
} from '.'

export default class Region {
  constructor(
    public id: string,
    public services: ICloudService[],
    public emissionsFactors: CloudConstantsEmissionsFactors,
    public constants: CloudConstants,
  ) {}

  public async getEstimates(
    startDate: Date,
    endDate: Date,
  ): Promise<{ [service: string]: FootprintEstimate[] }> {
    const estimates: FootprintEstimate[][] = await Promise.all(
      this.services.map(async (service) => {
        return await service.getEstimates(
          startDate,
          endDate,
          this.id,
          this.emissionsFactors,
          this.constants,
        )
      }),
    )

    return estimates.reduce((estimatesMap: RegionEstimates, estimate, i) => {
      estimatesMap[this.services[i].serviceName] = estimate
      return estimatesMap
    }, {})
  }

  public async getCosts(startDate: Date, endDate: Date): Promise<RegionCosts> {
    const estimates: Cost[][] = await Promise.all(
      this.services.map(async (service) => {
        return await service.getCosts(startDate, endDate, this.id)
      }),
    )

    return estimates.reduce((estimatesMap: RegionCosts, estimate, i) => {
      estimatesMap[this.services[i].serviceName] = estimate
      return estimatesMap
    }, {})
  }
}

export interface RegionEstimates {
  [service: string]: FootprintEstimate[]
}

export interface RegionCosts {
  [service: string]: Cost[]
}