/** Lottieهای لوکال (`public/lottie`) — پیش‌دانلود تا مودال/لیست خالی نماند */

const LOTTIE_FILES = {
  logoutConfirm: 'lottie/logoutConfirm.json',
  emptyList: 'lottie/emptyList.json',
  goldBars: 'lottie/goldBars.json',
} as const

export type LottieAssetKey = keyof typeof LOTTIE_FILES

const cache = new Map<LottieAssetKey, string>()

export function lottieSrc(key: LottieAssetKey): string {
  const base = import.meta.env.BASE_URL || '/'
  const path = `${base}${LOTTIE_FILES[key]}`
  return path.replace(/([^:]\/)\/+/g, '$1')
}

export function getLottieData(key: LottieAssetKey): string | undefined {
  return cache.get(key)
}

export async function preloadLottieAssets(): Promise<void> {
  const keys = Object.keys(LOTTIE_FILES) as LottieAssetKey[]
  await Promise.all(
    keys.map(async (key) => {
      if (cache.has(key)) return
      try {
        const res = await fetch(lottieSrc(key))
        if (!res.ok) return
        cache.set(key, await res.text())
      } catch {
        /* شبکه/آفلاین — بعداً از src لوکال می‌خواند */
      }
    }),
  )
}