// Lightweight protocol scaffold for Open-EnergyMesh 0.2 core ontology
// This file provides tiny, versioned data contracts used by adapters.

// Privacy budget and audit trail primitives to support privacy-preserving
// aggregation and governance provenance in the MVP.
class PrivacyBudget {
  constructor(limit = 0, allocated = 0) {
    this.limit = limit; // maximum allowed budget (abstract unit)
    this.allocated = allocated; // amount currently allocated/used
  }
}

class AuditLog {
  constructor(entries = []) {
    this.entries = entries; // array of audit entries
  }
  addEntry(entry) {
    this.entries.push(entry);
  }
}

// Lightweight protocol scaffold for Open-EnergyMesh 0.2 core ontology
// This file provides tiny, versioned data contracts used by adapters.

class LocalProblem {
  constructor(version = '0.2') {
    this.version = version;
    this.variables = {}; // local optimization variables
    this.constraints = []; // local constraints
    this.objective = null; // objective description or function reference
    this.privacyBudget = new PrivacyBudget();
    this.auditLog = new AuditLog();
  }
}

class SharedVariables {
  constructor() {
    this.variables = {}; // dual/shared variables (e.g., Lagrange multipliers)
    this.metadata = {};
  }
}

class PlanDelta {
  constructor(timestamp = Date.now()) {
    this.timestamp = timestamp;
    this.changes = {}; // delta payload describing what changed
  }
}

module.exports = {
  LocalProblem,
  SharedVariables,
  PlanDelta,
  PrivacyBudget,
  AuditLog
};