// Background-sync decision layer — pure, on top of `@voltro/react-native`.
//
// The framework owns the DECISION (should this trigger actually sync, given
// what's in flight + when we last ran); the OS wiring (AppState / interval /
// background-fetch) is the screen's. Keeping the decision here + pure means a
// screen never re-implements the gate, and the gate is unit-testable.
import {
  backgroundSyncReducer,
  initialBackgroundSyncState,
  shouldSync,
  type BackgroundSyncState,
  type ShouldSyncOptions,
} from '@voltro/react-native'

/** Sync every 5 minutes while foregrounded (matches `offlineFirstDefaults`). */
export const SYNC_OPTIONS: ShouldSyncOptions = { intervalMs: 5 * 60_000, enabled: true }

/**
 * Should a trigger (foreground return, interval tick, manual pull) actually kick
 * a sync now? `force` bypasses the foreground + interval gates (a manual pull).
 */
export const planSync = (
  state: BackgroundSyncState,
  now: number,
  force = false,
): boolean => shouldSync(state, now, SYNC_OPTIONS, force)

export { backgroundSyncReducer, initialBackgroundSyncState }
export type { BackgroundSyncState }