{"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  delete_wins: true,\n  latest_by: 'sequence',\n  scope_key: 'tenant',\n  tie_policy: 'first',\n  allow_resurrection: true,\n  amount_mode: 'absolute',\n  gap_policy: 'accept',\n  precision: 0,\n  inclusive_age: true,\n  max_age: 60,\n  audit_duplicate: true,\n  order: 'key'\n};\n","helpers.ts":"export type Decimal = { coefficient: bigint; scale: number };\n\nfunction power10(exponent: number): bigint {\n  return 10n ** BigInt(exponent);\n}\n\nexport function parseDecimal(text: string): Decimal {\n  const parts = text.split('.');\n  const fraction = parts[1] || '';\n  return {\n    coefficient: BigInt((parts[0] || '0') + fraction),\n    scale: fraction.length\n  };\n}\n\nexport function addDecimal(a: Decimal, b: Decimal): Decimal {\n  const scale = Math.max(a.scale, b.scale);\n  return {\n    coefficient: a.coefficient * power10(scale - a.scale) +\n      b.coefficient * power10(scale - b.scale),\n    scale\n  };\n}\n\nexport function formatDecimal(value: Decimal, precision: number): string {\n  let units: bigint;\n  if (value.scale <= precision) {\n    units = value.coefficient * power10(precision - value.scale);\n  } else {\n    const divisor = power10(value.scale - precision);\n    units = value.coefficient / divisor;\n    if ((value.coefficient % divisor) * 2n >= divisor) units += 1n;\n  }\n  if (precision === 0) return units.toString();\n  const digits = units.toString().padStart(precision + 1, '0');\n  return digits.slice(0, -precision) + '.' + digits.slice(-precision);\n}\n\nexport function compareKey(a: any, b: any): number {\n  return a < b ? -1 : a > b ? 1 : 0;\n}\n","core.ts":"import {addDecimal, compareKey, formatDecimal, parseDecimal} from './helpers.ts';\nimport type {Decimal} from './helpers.ts';\n\ntype IndexedEvent = { event: any; index: number };\ntype Group = { tenant: any; entity: any; firstIndex: 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 groupsByTenant = 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 tenantGroups = groupsByTenant.get(event.tenant);\n    if (!tenantGroups) {\n      tenantGroups = new Map<any, Group>();\n      groupsByTenant.set(event.tenant, tenantGroups);\n    }\n    let group = tenantGroups.get(event.entity);\n    if (!group) {\n      group = {tenant: event.tenant, entity: event.entity, firstIndex: index, events: []};\n      tenantGroups.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) => compareKey(a.tenant, b.tenant) || compareKey(a.entity, b.entity));\n  } else {\n    groups.sort((a, b) => a.firstIndex - b.firstIndex);\n  }\n\n  const field = policy.latest_by === 'sequence' || policy.latest_by === 'seq' ? 'seq' : 'ts';\n  const entities = groups.map(group => {\n    const byField = new Map<any, IndexedEvent>();\n    for (const item of group.events) {\n      const key = item.event[field];\n      if (!byField.has(key) || policy.tie_policy === 'last') byField.set(key, item);\n    }\n    const retained = Array.from(byField.values());\n    retained.sort((a, b) => compareKey(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 = parseDecimal(event.amount);\n        value = policy.amount_mode === 'delta' ? addDecimal(value, amount) : amount;\n      }\n    }\n    if (policy.delete_wins && hasDelete) deleted = true;\n    return {\n      tenant: group.tenant,\n      entity: group.entity,\n      value: formatDecimal(value, policy.precision),\n      deleted\n    };\n  });\n  return {entities, duplicates};\n}\n"}}