WIA-CITY-005 Interactive Simulator

// Energy Balance Calculation
function calculateEnergyBalance(production, consumption) {
  const netEnergy = production - consumption;
  const balanceRatio = production / consumption;

  return {
    netEnergy: netEnergy,
    balanceRatio: balanceRatio,
    status: balanceRatio >= 1.0 ? 'surplus' : 'deficit',
    selfSufficiency: Math.min(balanceRatio * 100, 100)
  };
}

// ZEB Grade Calculation (1-5)
function calculateZEBGrade(balanceRatio) {
  if (balanceRatio >= 1.2) return 1;      // Grade 1 (Premium)
  if (balanceRatio >= 1.0) return 2;      // Grade 2 (Excellent)
  if (balanceRatio >= 0.8) return 3;      // Grade 3 (Good)
  if (balanceRatio >= 0.6) return 4;      // Grade 4 (Fair)
  return 5;                               // Grade 5 (Needs Improvement)
}

// Energy Optimization
function optimizeEnergyUsage(consumption, production, ess) {
  const surplus = production - consumption;

  if (surplus > 0) {
    // Charge ESS with surplus
    const chargeAmount = Math.min(surplus, ess.maxChargeRate);
    return {
      action: 'charge',
      amount: chargeAmount,
      gridExport: surplus - chargeAmount
    };
  } else {
    // Discharge ESS to cover deficit
    const deficit = Math.abs(surplus);
    const dischargeAmount = Math.min(deficit, ess.availableEnergy);
    return {
      action: 'discharge',
      amount: dischargeAmount,
      gridImport: deficit - dischargeAmount
    };
  }
}

// Solar Panel API Integration
const solarConfig = {
  apiEndpoint: 'https://api.solar-monitor.io/v1',
  panels: [
    {
      id: 'PV-001',
      capacity: 400,        // Watts
      efficiency: 0.85,
      orientation: 'south',
      tilt: 30,
      inverter: 'INV-001'
    }
  ],
  monitoring: {
    interval: 300,          // seconds
    metrics: ['power', 'voltage', 'current', 'temperature']
  }
};

async function getSolarProduction() {
  const response = await fetch(
    `${solarConfig.apiEndpoint}/production/realtime`,
    {
      headers: {
        'Authorization': `Bearer ${API_KEY}`,
        'Content-Type': 'application/json'
      }
    }
  );
  return response.json();
}

// ESS Battery Management
class ESSController {
  constructor(capacity, maxChargeRate, maxDischargeRate) {
    this.capacity = capacity;
    this.currentCharge = 0;
    this.maxChargeRate = maxChargeRate;
    this.maxDischargeRate = maxDischargeRate;
  }

  charge(amount) {
    const actualCharge = Math.min(
      amount,
      this.maxChargeRate,
      this.capacity - this.currentCharge
    );
    this.currentCharge += actualCharge;
    return actualCharge;
  }

  discharge(amount) {
    const actualDischarge = Math.min(
      amount,
      this.maxDischargeRate,
      this.currentCharge
    );
    this.currentCharge -= actualDischarge;
    return actualDischarge;
  }

  getStatus() {
    return {
      charge: this.currentCharge,
      capacity: this.capacity,
      percentage: (this.currentCharge / this.capacity) * 100,
      available: this.currentCharge
    };
  }
}

// Smart Grid Communication Protocol
const gridProtocol = {
  export: async (energyKWh, price) => {
    return await fetch('https://smartgrid.io/v1/export', {
      method: 'POST',
      body: JSON.stringify({
        buildingId: 'ZEB-12345',
        energy: energyKWh,
        timestamp: new Date().toISOString(),
        price: price
      })
    });
  },

  import: async (energyKWh) => {
    return await fetch('https://smartgrid.io/v1/import', {
      method: 'POST',
      body: JSON.stringify({
        buildingId: 'ZEB-12345',
        energy: energyKWh,
        timestamp: new Date().toISOString()
      })
    });
  },

  getRealtimePricing: async () => {
    const response = await fetch(
      'https://smartgrid.io/v1/pricing/realtime'
    );
    return response.json();
  }
};

{
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://wia.official/credentials/zeb/v1"
  ],
  "type": ["VerifiableCredential", "ZEBCertificate"],
  "issuer": {
    "id": "did:wia:certification-authority",
    "name": "WIA Certification Authority"
  },
  "issuanceDate": "2025-12-25T00:00:00Z",
  "expirationDate": "2026-12-25T00:00:00Z",
  "credentialSubject": {
    "id": "did:wia:building:green-tower-a",
    "buildingName": "Green Tower A",
    "address": "123 Eco Street, Green City",
    "zebGrade": 2,
    "energyBalance": {
      "annualProduction": 164250,
      "annualConsumption": 159800,
      "balanceRatio": 1.028,
      "selfSufficiency": 100
    },
    "carbonNeutral": true,
    "netEmissions": -5.2,
    "renewableSources": ["solar", "geothermal", "wind"],
    "certification": {
      "standard": "WIA-CITY-005",
      "version": "1.0",
      "auditDate": "2025-11-15",
      "certifier": "WIA Certified Auditor #1234"
    }
  },
  "proof": {
    "type": "Ed25519Signature2020",
    "created": "2025-12-25T00:00:00Z",
    "verificationMethod": "did:wia:certification-authority#key-1",
    "proofPurpose": "assertionMethod",
    "proofValue": "z3FXQsWzCRmzH4..."
  }
}