package expo.modules.localization

import android.text.TextUtils
import java.util.*

val USES_IMPERIAL = listOf("US", "LR", "MM")

// https://wisevoter.com/country-rankings/countries-that-use-fahrenheit/
val USES_FAHRENHEIT = listOf("AG", "BZ", "VG", "FM", "MH", "MS", "KN", "BS", "CY", "TC", "US", "LR", "PW", "KY")

val ISOCurrencyCodes: Array<String> by lazy {
  Currency.getAvailableCurrencies().map { it.currencyCode as String }.toTypedArray()
}

fun getLocaleNames(locales: List<Locale>) = locales.map { it.toLanguageTag() }.toTypedArray()

fun getCountryCode(locale: Locale): String? {
  return runCatching {
    val country = locale.country
    if (TextUtils.isEmpty(country)) null else country
  }.getOrNull()
}

fun getSystemProperty(key: String): String {
  return runCatching {
    val systemProperties = Class.forName("android.os.SystemProperties")
    val get = systemProperties.getMethod("get", String::class.java)
    get.invoke(systemProperties, key) as String
  }.getOrNull() ?: ""
}

fun getCurrencyCode(locale: Locale): String? {
  return runCatching {
    val currency = Currency.getInstance(locale)
    currency?.currencyCode
  }.getOrNull()
}

fun getRegionCode(locale: Locale): String? {
  val miuiRegion = getSystemProperty("ro.miui.region")
  return miuiRegion.ifEmpty {
    getCountryCode(locale)
  }
}

fun getTemperatureUnit(locale: Locale): String? {
  val countryCode = getRegionCode(locale) ?: return null
  return if (USES_FAHRENHEIT.contains(countryCode)) "fahrenheit" else "celsius"
}