package com.ahmed.jarvis

import android.content.BroadcastReceiver
import android.content.Context
import android.content.Intent
import android.provider.Telephony

/**
 * Forwards incoming SMS to the gateway (the `sms_in` event, APP_PLAN §3).
 *
 * The gateway applies the sender watch-list; this receiver does no filtering
 * beyond grouping multipart messages. Delivery only reaches the WebSocket while
 * the Flutter engine is alive (foreground / recently backgrounded) — see
 * [MainActivity.forwardSms]. Guaranteed background forwarding would need a
 * persistent/headless service and is a documented TODO.
 */
class SmsReceiver : BroadcastReceiver() {
    override fun onReceive(context: Context?, intent: Intent?) {
        if (intent?.action != Telephony.Sms.Intents.SMS_RECEIVED_ACTION) return
        val messages = Telephony.Sms.Intents.getMessagesFromIntent(intent) ?: return
        if (messages.isEmpty()) return

        // Multipart texts arrive as several PDUs — stitch the body back together.
        val sender = messages[0].displayOriginatingAddress ?: messages[0].originatingAddress ?: ""
        val ts = messages[0].timestampMillis
        val body = buildString {
            for (m in messages) append(m.messageBody ?: "")
        }
        if (sender.isBlank() && body.isBlank()) return

        MainActivity.forwardSms(sender, body, ts)
    }
}