// Protocol 0.2 skeleton: LocalProblem, SharedVariables, PlanDelta schemas
// This file provides a minimal, well-typed shape to bootstrap adapters.

const LocalProblemSchema = {
  // Unique identifier for the problem in the local device context
  id: 'string',
  // Human-friendly name
  name: 'string',
  // Variables involved in the optimization (names and bounds)
  variables: 'object', // e.g., { v1: {min, max}, v2: {min, max} }
  // Objective (quadratic or linear) descriptor
  objective: 'object', // placeholder for { type, coefficients }
  // Constraints (simple, friendly for MVP)
  constraints: 'object'
};

const SharedVariablesSchema = {
  // Round-based shared state used in ADMM iterations
  rounds: 'number',
  // Shared variable values by name
  values: 'object' // e.g., { x1: 1.2, x2: 3.4 }
};

const PlanDeltaSchema = {
  // Delta from the latest local plan, used for delta-syncs
  delta: 'object', // e.g., { updatedVars: [...], deltaValues: {...} }
  // Versioning for deterministic reconciliation
  version: 'number',
  // Audit timestamp
  timestamp: 'number'
};

module.exports = {
  LocalProblemSchema,
  SharedVariablesSchema,
  PlanDeltaSchema
};