package link.roadio.riff

import android.app.Application
import android.content.Context
import android.os.SystemClock
import android.util.Log
import java.io.PrintWriter
import java.util.concurrent.ConcurrentHashMap

/** Monotonic process-entry evidence; no configuration, selected-root or media access. */
class RiffApplication : Application() {
    override fun attachBaseContext(base: Context) {
        super.attachBaseContext(base)
        StartupTrace.begin(Application.getProcessName())
    }
}

internal object StartupTrace {
    private var entry = 0L
    private val milestones = ConcurrentHashMap<String, Long>()

    fun begin(process: String) {
        entry = SystemClock.elapsedRealtime()
        Log.i("RiffStartup", "application_entry uptime_ms=$entry process=$process")
    }

    fun mark(
        event: String,
        details: String = "",
    ) {
        val now = SystemClock.elapsedRealtime()
        if (milestones.putIfAbsent(event, now) != null) return
        Log.i("RiffStartup", "$event elapsed_ms=${now - entry} uptime_ms=$now $details")
    }

    /** Service dumps retain evidence when vendor logging evicts early process milestones. */
    fun dump(writer: PrintWriter) {
        writer.println("RiffStartup: application_entry uptime_ms=$entry")
        milestones.toSortedMap().forEach { (event, now) ->
            writer.println("RiffStartup: $event elapsed_ms=${now - entry} uptime_ms=$now")
        }
    }
}