import {
  MeterFamilies,
  MeterFamily,
  MeterFamilyCode,
  AlphaA1MeterFamily,
  AlphaA3MeterFamily,
} from './MeterFamilies';

export type MeterInterpretationCode = number;

export type MeterPassword = string;

export type MeterName = string;

export interface ReadStrategy {
  name?: MeterName;
  meterFamily: MeterFamily;
  interpretationCode: MeterInterpretationCode;
  meterPassword?: MeterPassword;
  billingTable?: string | undefined;
}

export interface PartialStrategy {
  name: MeterName;
  meterFamily: MeterFamily;
}

const billingTables = {
  edenor: {
    alpha_a1: '00',
    alpha_a3: '00',
  },
  edemsa: {
    alpha_a1: '01',
    alpha_a3: '02',
  },
};

export const createReadStrategy = (
  name: MeterName,
  familyCode: MeterFamilyCode,
  interpretationCode: MeterInterpretationCode,
  utility: string = 'edemsa',
  meterPassword?: MeterPassword,
): ReadStrategy => {
  const foundMeterFamily = MeterFamilies.find(family => family.code === familyCode);

  if (foundMeterFamily == null) {
    throw new Error('Invalid meter family code');
  }
  const billingTable = billingTables[utility][foundMeterFamily.code] ?? undefined;
  const meterFamily: MeterFamily =
    foundMeterFamily.code === AlphaA1MeterFamily.code || foundMeterFamily.code === AlphaA3MeterFamily.code
      ? {
          ...foundMeterFamily,
          probeCommand: () => foundMeterFamily?.probeCommand(meterPassword, billingTable),
        }
      : foundMeterFamily;

  return {
    name,
    meterFamily,
    interpretationCode,
    meterPassword,
    billingTable,
  };
};

export const createPartialStrategy = (name: MeterName, familyCode: MeterFamilyCode): PartialStrategy => {
  const foundMeterFamily = MeterFamilies.find(family => family.code === familyCode);

  if (foundMeterFamily == null) {
    throw new Error('Invalid meter family code');
  }

  return {
    name,
    meterFamily: foundMeterFamily,
  };
};