const threeDecimalPositiveString = string(/^(?:0\.(?!000)[0-9]{3}|[1-9][0-9]{0,7}\.[0-9]{3})$/);
const threeDecimalPositiveZeroString = string(/^(?:0\.[0-9]{3}|[1-9][0-9]{0,7}\.[0-9]{3})$/);
const threeDecimalNegativePositiveString = string(/^[-]?(?:[1-9][0-9]{0,7}\.[0-9]{3}|0\.[0-9]{3})$/);
const oneDecimalPositiveString = string(/^(100(.0)?|[1-9]\d?(\.\d)?|0\.[1-9])$/);
const certificateNumberType = string(/[0-9]{30}/);
const productionDeviceIdType = string(/[0-9]{18}/);
// v81 XSD: SupportFlagType = pattern [0-9]{1,2} (1-2 digits). Used by SupportFlag element and PreConversionProductionDevice.supportFlag.
const supportFlagType = string(/^[0-9]{1,2}$/);
const shortCode = string(100);
const codingScheme = string(100);
const longCode = string(255);
const text = string(16000);

const sendCertificatesTypes = shape({
  messageSchema: shortCode().isRequired(),
  header: shape({
    messageID: shortCode().isRequired(),
    fromRegistry: shortCode().isRequired(),
    toRegistry: shortCode().isRequired(),
    context: constant("transfer").isRequired(),
    messageTransmissionTime: datetime().isRequired()
  }).isRequired(),
  body: shape({
    sendingAccountId: shortCode().isRequired(),
    sendingAccountIdCs: codingScheme(),
    receivingAccountId: shortCode().isRequired(),
    receivingAccountIdCs: codingScheme(),
    numberOfCertificates: number(0, null).isRequired(),
    // Message: 0 or 1 per body. XSD LongString max 1024
    message: string(1, 1024),
    certificates: array(shape({
      // v81: faceValue is now optional (use="optional" added), but kept for compatibility
      faceValue: constant("MWh"),

      // StartCertificateNumber
      startCertificateNumber: certificateNumberType().isRequired(),
      startCertificateNumberCs: codingScheme(),

      // EndCertificateNumber
      endCertificateNumber: certificateNumberType().isRequired(),
      endCertificateNumberCs: codingScheme(),

      issuingBody: string(1, 20).isRequired(),
      countryOfIssue: string(1, 20).isRequired(),
      dateOfIssue: date().isRequired(),

      // Production period
      productionPeriodStart: offsetDateTime().isRequired(),
      productionPeriodEnd: offsetDateTime().isRequired(),
      // v81: New attribute added
      productionPeriodLength: string(1, 20),

      energyCarrier: oneOf(["Electricity", "EnergyGas", "Hydrogen"]).isRequired(),

      // Conversion
      conversionType: string(1, 20).isRequired(),
      // v81: New attribute added
      preConversionCancellationStatement: string(1, 150),

      // v81: New Pre-Conversion elements
      // PreConversionProductionPeriod
      preConversionProductionPeriodStart: offsetDateTime(),
      preConversionProductionPeriodEnd: offsetDateTime(),
      preConversionProductionPeriodLength: string(1, 20),

      // PreConversionProductionDevice
      preConversionProductionDeviceId: productionDeviceIdType(),
      preConversionProductionDeviceName: string(1, 255),
      preConversionProductionDeviceTechnology: string(1, 20),
      preConversionProductionDeviceDateOperational: date(),
      preConversionProductionDeviceCapacity: threeDecimalPositiveString,
      preConversionProductionDeviceLabel: string(1, 20),
      // v81 XSD: PreConversionProductionDevice.supportFlag uses SupportFlagType [0-9]{1,2}. New in v81, no v80 compatibility needed.
      preConversionProductionDeviceSupportFlag: supportFlagType(),

      // PreConversionPDCoordinates
      preConversionPDLongitude: string(1, 20),
      preConversionPDLatitude: string(1, 20),
      preConversionPDCoordinateCode: string(1, 20),

      // PreConversionPDAddress
      preConversionPDCountry: string(1, 20),
      preConversionPDCity: string(1, 150),
      preConversionPDPostCode: string(1, 10),
      preConversionPDStreetName: string(1, 150),
      preConversionPDStreetNumber: string(1, 10),

      // PreConversionEmissions
      preConversionEmissions: threeDecimalPositiveZeroString,
      preConversionEmissionsCalculationMethod: string(1, 20),

      // PreConversionRadioactiveWaste
      preConversionRadioactiveWaste: threeDecimalPositiveString,
      preConversionRadioactiveWasteCalculationMethod: string(1, 20),

      // Storage (mandatory in v81; tag required, 1-20 characters)
      storageTag: string(1, 20).isRequired(),
      // v81: New Storage attributes
      storageEfficiencyFactor: oneDecimalPositiveString,
      storageCancellationStatement: string(1, 150),
      storageCancellationIssuingBody: string(1, 2),

      // v81: New Storage child elements
      // StorageSystemCoordinates
      storageSystemLongitude: string(1, 20),
      storageSystemLatitude: string(1, 20),
      storageSystemCoordinateCode: string(1, 20),

      // StorageSystemAddress
      storageSystemCountry: string(1, 20),
      storageSystemCity: string(1, 150),
      storageSystemPostCode: string(1, 10),
      storageSystemStreetName: string(1, 150),
      storageSystemStreetNumber: string(1, 10),

      // PreStorageProductionPeriod
      preStorageProductionPeriodStart: offsetDateTime(),
      preStorageProductionPeriodEnd: offsetDateTime(),
      preStorageProductionPeriodLength: string(1, 20),

      // Product (at least one required)
      product: array(shape({
        name: string(1, 20).isRequired(),
        legalStatus: oneOf(["LC", "NGC"]).isRequired(),
        // Purpose: 1 or more per product
        purpose: array(oneOf(["Disclosure", "Support", "Target"]), 1, 3).isRequired(),
        competentAuthority: array(shape({
          code: string(4),
        }), 10),
        productType: array(shape({
          value: string(1, 20).isRequired(),
          type: oneOf(["driver", "targetType", "targetScheme"]).isRequired(),
        }), 10)
      }), 1, 10).isRequired(),

      // Production device
      productionDeviceId: productionDeviceIdType().isRequired(),
      productionDeviceIdCs: codingScheme(),

      productionDeviceName: string(1, 255),
      dateOperational: date().isRequired(),

      // Capacity
      electricalCapacity: threeDecimalPositiveString,
      mechanicalCapacity: threeDecimalPositiveString,
      thermalCapacity: threeDecimalPositiveString,
      gasProductionCapacity: threeDecimalPositiveString,

      // Module (ModuleCapacity mandatory, one per Module)
      moduleCapacity: threeDecimalPositiveString,
      moduleDateOperational: date(),
      moduleDescription: string(1, 255),

      // Production technology
      productionTechnology: string(1, 20).isRequired(),
      productionTechnologyCs: codingScheme(),

      // Energy source
      energySource: string(1, 20).isRequired(),
      energySourceCs: codingScheme(),
      advancedBiomassFeedstock: boolean(),

      sourceShares: string(1, 255),

      // Support flag
      // v81 XSD: SupportFlagType [0-9]{1,2}. v80 used xs:byte. Kept string(1, 20) for v80 compatibility - validate [0-9]{1,2} at v81 export.
      supportFlag: string(1, 20).isRequired(),
      supportFlagCs: codingScheme(),

      productionSupportDescription: string(1, 1024),
      investmentSupportDescription: string(1, 1024),

      // Production device location
      // The requested combination of coordinates parameters is checked in Val79RuleService
      // Coordinates
      productionDeviceLongitude: string(1, 20),
      productionDeviceLatitude: string(1, 20),
      productionDeviceCoordinateCode: string(1, 20),
      // The requested combination of address parameters is checked in Val79RuleService
      // Address
      productionDeviceCity: string(1, 150),
      productionDevicePostCode: string(1, 10),
      productionDeviceCountry: string(1, 20),
      // v81: New Address attributes
      productionDeviceStreetName: string(1, 150),
      productionDeviceStreetNumber: string(1, 10),

      // v81: Changed from TinyToken (1-20) to DisseminationLevelType (1-2)
      disseminationLevel: string(1, 20).isRequired(),

      // Cogeneration
      useOfHeat: string(1, 20),
      percentagePrimaryEnergySaved: oneDecimalPositiveString,
      amountPrimaryEnergySaved: threeDecimalPositiveString,
      overallPrimaryEnergySavings: oneDecimalPositiveString,
      usefulHeat: threeDecimalPositiveString,
      hecCriteriaMet: boolean(),

      electricalEfficiency: oneDecimalPositiveString,
      thermalEfficiency: oneDecimalPositiveString,

      // Gas
      compositionPurity: string(1, 20),
      gasCompositionCriteria: string(1, 20),
      gasUsage: string(1, 20),
      gasType: string(1, 20),
      // v81: New Gas child elements
      gasCriterion: string(1, 1024),
      etsEsrEligibility: string(2, 5),
      // v81: New required attribute
      fossilAuxiliaryDeducted: string(1, 20),

      // CalorificValue
      calorificValue: threeDecimalPositiveString,
      // If calorific value exists the type is required (validated in Val105RuleService)
      calorificValueType: oneOf(["lower", "higher"]),
      calorificValueUnit: string(1, 20),

      // GHGEmissions
      // GHGEmissionsProduced
      // GHGEmissionsProduced: 3 decimals, min -99999999.999, max 99999999.999
      ghgEmissionsProduced: threeDecimalNegativePositiveString,
      // If ghgEmissionsProduced exists the ghgEmissionsProducedCalculationMethod is required (validated in Val109RuleService)
      ghgEmissionsProducedCalculationMethod: string(1, 20),
      ghgEmissionsProducedUnit: string(1, 20),
      ghgSavingsCriteriaMet: boolean(),
      // AbsoluteGHGEmissionsSaved
      absoluteGHGEmissionsSaved: threeDecimalPositiveZeroString,
      // If absoluteGHGEmissionsSaved exists the absoluteGHGEmissionsSavedCalculationMethod is required (validated in Val110RuleService)
      absoluteGHGEmissionsSavedCalculationMethod: string(1, 20),
      absoluteGHGEmissionsSavedUnit: string(1, 20),

      // RadioactiveWasteProduced
      radioactiveWasteProduced: threeDecimalPositiveString,
      radioactiveWasteCalculationMethod: string(1, 20),

      // Sustainability
      requirementReference: string(1, 20),
      sustainabilityScheme: string(1, 20),
      auditReport: string(1, 255),
      sustainabilityAdditionalInfo: string(1, 255),
      sustainabilityCriteriaMet: boolean(),
      certificationBody: string(1, 20),

      label: array(longCode(), 50),
      additionalInfo: string(1, 255),

      // v81: New elements added to Certificates sequence
      // BiddingZone
      biddingZone: string(1, 20),
      biddingZone90PercentageRES: boolean(),
      biddingZoneLowEmission: boolean(),

      // RedispatchingCriteriaMet
      redispatchingCriteriaMet: boolean(),

      // PowerPurchaseAgreement
      powerPurchaseAgreementStartDate: date(),
      powerPurchaseAgreementEndDate: date(),
      powerPurchaseAgreementBuyerId: string(1, 150),

      // CustomAttributes: optional; inner keys are validated by the certificate-type custom scheme
      customAttributes: shape({}, true),
    }), 50000).isRequired(),
  }).isRequired()
});