package oppen.ariane.ui.settings

import android.os.Bundle
import androidx.preference.Preference
import androidx.preference.PreferenceCategory
import androidx.preference.PreferenceFragmentCompat
import androidx.preference.SwitchPreferenceCompat
import java.security.SecureRandom
import java.util.*
import javax.net.ssl.SSLContext
import javax.net.ssl.SSLSocket
import javax.net.ssl.SSLSocketFactory

class SettingsFragment: PreferenceFragmentCompat(), Preference.OnPreferenceChangeListener {

    lateinit var protocols: Array<String>

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        val context = preferenceManager.context
        val screen = preferenceManager.createPreferenceScreen(context)

        val tlsCategory = PreferenceCategory(context)
        tlsCategory.key = "tls_category"
        tlsCategory.title = "TLS Config"
        screen.addPreference(tlsCategory)

        val sslContext = SSLContext.getInstance("TLS")
        sslContext.init(null, null, SecureRandom())
        val factory: SSLSocketFactory = sslContext.socketFactory
        val socket = factory.createSocket() as SSLSocket
        protocols = socket.supportedProtocols
        protocols.forEach { protocol ->
            val tlsPreference = SwitchPreferenceCompat(context)
            tlsPreference.key = "tls_${protocol.toLowerCase(Locale.getDefault())}"
            tlsPreference.title = protocol
            tlsPreference.onPreferenceChangeListener = this
            tlsCategory.addPreference(tlsPreference)
        }

        preferenceScreen = screen
    }

    override fun onPreferenceChange(preference: Preference?, newValue: Any?): Boolean {

        preference?.key?.let{ key ->
            if(key.startsWith("tls_")){
                protocols.forEach {protocol ->
                    val tlsSwitchKey = "tls_${protocol.toLowerCase(Locale.getDefault())}"
                    if(tlsSwitchKey != key){
                        val otherTLSSwitch = preferenceScreen.findPreference<SwitchPreferenceCompat>(tlsSwitchKey)
                        otherTLSSwitch?.isChecked = false
                    }
                }
            }
        }

       return  true
    }
}