{"files":{"main.ts":"import {run} from './core.ts';\nimport {POLICY} from './policy.ts';\nexport function evaluate(payload: any): any { return run(payload, POLICY); }\n","policy.ts":"export const POLICY: any = {\n  scope_key: 'tenant',\n  latest_by: 'sequence',\n  tie_policy: 'first',\n  delete_wins: true,\n  allow_resurrection: true,\n  amount_mode: 'absolute',\n  precision: 0,\n  gap_policy: 'accept',\n  audit_duplicate: true,\n  order: 'key',\n  max_age: 60,\n  inclusive_age: true\n};\n","helpers.ts":"export type Decimal = { coefficient: bigint; scale: number };\n\nexport function decimal(text: string): Decimal {\n  const [whole, fraction = ''] = text.split('.');\n  return { coefficient: BigInt((whole || '0') + fraction), scale: fraction.length };\n}\n\nfunction power(n: number): bigint {\n  return 10n ** BigInt(n);\n}\n\nexport function add(a: Decimal, b: Decimal): Decimal {\n  const scale = Math.max(a.scale, b.scale);\n  return {\n    coefficient: a.coefficient * power(scale - a.scale) + b.coefficient * power(scale - b.scale),\n    scale\n  };\n}\n\nexport function fixed(value: Decimal, precision: number): string {\n  let units: bigint;\n  if (value.scale <= precision) {\n    units = value.coefficient * power(precision - value.scale);\n  } else {\n    const divisor = power(value.scale - precision);\n    units = value.coefficient / divisor;\n    if ((value.coefficient % divisor) * 2n >= divisor) units += 1n;\n  }\n  const digits = units.toString();\n  if (precision === 0) return digits;\n  const padded = digits.padStart(precision + 1, '0');\n  return padded.slice(0, -precision) + '.' + padded.slice(-precision);\n}\n\nexport function compare(a: any, b: any): number {\n  return a < b ? -1 : a > b ? 1 : 0;\n}\n","core.ts":"import {decimal, add, fixed, compare, Decimal} from './helpers.ts';\n\ntype IndexedEvent = { event: any; index: number };\ntype Group = { tenant: any; entity: any; first: number; events: IndexedEvent[] };\n\nexport function run(payload: any, policy: any): any {\n  const duplicates: any[] = [];\n  const globalSeen = new Set<any>();\n  const tenantSeen = new Map<any, Set<any>>();\n  const tenants = new Map<any, Map<any, Group>>();\n  const groups: Group[] = [];\n\n  for (let index = 0; index < payload.events.length; index++) {\n    const event = payload.events[index];\n    const age = payload.now - event.ts;\n    if (age > policy.max_age || (age === policy.max_age && !policy.inclusive_age)) continue;\n\n    let seen = globalSeen;\n    if (policy.scope_key === 'tenant') {\n      let scoped = tenantSeen.get(event.tenant);\n      if (!scoped) {\n        scoped = new Set<any>();\n        tenantSeen.set(event.tenant, scoped);\n      }\n      seen = scoped;\n    }\n    if (seen.has(event.id)) {\n      if (policy.audit_duplicate) duplicates.push(event.id);\n      continue;\n    }\n    seen.add(event.id);\n\n    let entities = tenants.get(event.tenant);\n    if (!entities) {\n      entities = new Map<any, Group>();\n      tenants.set(event.tenant, entities);\n    }\n    let group = entities.get(event.entity);\n    if (!group) {\n      group = { tenant: event.tenant, entity: event.entity, first: index, events: [] };\n      entities.set(event.entity, group);\n      groups.push(group);\n    }\n    group.events.push({ event, index });\n  }\n\n  if (policy.order === 'key') {\n    groups.sort((a, b) => compare(a.tenant, b.tenant) || compare(a.entity, b.entity));\n  } else {\n    groups.sort((a, b) => a.first - b.first);\n  }\n\n  const field = policy.latest_by === 'sequence' ? 'seq' : 'ts';\n  const entities = groups.map(group => {\n    const bySortValue = new Map<any, IndexedEvent>();\n    for (const item of group.events) {\n      const key = item.event[field];\n      if (!bySortValue.has(key) || policy.tie_policy === 'last') bySortValue.set(key, item);\n    }\n    const retained = Array.from(bySortValue.values());\n    retained.sort((a, b) => compare(a.event[field], b.event[field]));\n\n    let seq = 0;\n    let value: Decimal = { coefficient: 0n, scale: 0 };\n    let deleted = false;\n    let hasDelete = false;\n    for (const item of retained) {\n      const event = item.event;\n      if (event.kind === 'delete') hasDelete = true;\n      if (policy.gap_policy === 'ignore' && event.seq !== seq + 1) continue;\n      seq = event.seq;\n      if (event.kind === 'delete') {\n        deleted = true;\n      } else if (event.kind === 'set' && (!deleted || policy.allow_resurrection)) {\n        deleted = false;\n        const amount = decimal(event.amount);\n        value = policy.amount_mode === 'absolute' ? amount : add(value, amount);\n      }\n    }\n    if (policy.delete_wins && hasDelete) deleted = true;\n    return { tenant: group.tenant, entity: group.entity, value: fixed(value, policy.precision), deleted };\n  });\n  return { entities, duplicates };\n}\n"}}