package dev.itsh.tetherapi.receiver

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.net.ConnectivityManager
import android.os.Build
import androidx.preference.PreferenceManager
import dev.itsh.tetherapi.service.TetherApiService

class TetherStateReceiver : BroadcastReceiver() {

    override fun onReceive(context: Context, intent: Intent) {
        if (intent.action != ACTION_TETHER_STATE_CHANGED) return

        val prefs = PreferenceManager.getDefaultSharedPreferences(context)
        val autoStartEnabled = prefs.getBoolean(PREF_AUTO_START, true)

        if (!autoStartEnabled) return

        val isTethering = isTetherActive(context, intent)
        val port = prefs.getInt(PREF_PORT, TetherApiService.DEFAULT_PORT)

        if (isTethering && !TetherApiService.isRunning) {
            TetherApiService.start(context, port)
        } else if (!isTethering && TetherApiService.isRunning) {
            TetherApiService.stop(context)
        }
    }

    @Suppress("DEPRECATION")
    private fun isTetherActive(context: Context, intent: Intent): Boolean {
        val extras = intent.extras ?: return false

        val activeList = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
            extras.getStringArrayList("activeArray")
        } else {
            @Suppress("UNCHECKED_CAST")
            extras.get("activeArray") as? ArrayList<String>
        }

        if (!activeList.isNullOrEmpty()) {
            return true
        }

        return try {
            val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
            val method = cm.javaClass.getDeclaredMethod("getTetheredIfaces")
            val tetheredIfaces = method.invoke(cm) as? Array<*>
            tetheredIfaces != null && tetheredIfaces.isNotEmpty()
        } catch (e: Exception) {
            false
        }
    }

    companion object {
        const val ACTION_TETHER_STATE_CHANGED = "android.net.conn.TETHER_STATE_CHANGED"
        const val PREF_AUTO_START = "auto_start_on_tether"
        const val PREF_PORT = "api_port"
    }
}