package uk.orllewin.sianel.data

import android.content.Context
import android.content.SharedPreferences
import androidx.core.content.edit

object Prefs {
    private const val FILE = "sianel_prefs"
    private const val KEY_PASSWORD = "password_enc"   // AES-GCM blob (see Crypto)
    private const val KEY_BASE_URL = "base_url"
    const val DEFAULT_BASE_URL = ""//https://orllewin.uk/video

    @Volatile
    private var cached: SharedPreferences? = null

    private fun prefs(context: Context): SharedPreferences =
        cached ?: synchronized(this) {
            cached ?: context.applicationContext
                .getSharedPreferences(FILE, Context.MODE_PRIVATE)
                .also { cached = it }
        }

    fun getPassword(context: Context): String =
        prefs(context).getString(KEY_PASSWORD, null)
            ?.let { Crypto.decrypt(it) }
            .orEmpty()

    fun setPassword(context: Context, password: String) =
        prefs(context).edit { putString(KEY_PASSWORD, Crypto.encrypt(password)) }

    fun clearPassword(context: Context) = prefs(context).edit { remove(KEY_PASSWORD) }
    fun clearBaseUrl(context: Context) = prefs(context).edit { remove(KEY_BASE_URL) }

    fun getBaseUrl(context: Context): String =
        prefs(context).getString(KEY_BASE_URL, null)?.takeIf { it.isNotBlank() } ?: DEFAULT_BASE_URL

    fun setBaseUrl(context: Context, baseUrl: String) =
        prefs(context).edit { putString(KEY_BASE_URL, baseUrl) }
}