package com.ustadmobile.testservercontroller.util

import com.ustadmobile.testservercontroller.util.ext.fileNameSuffix
import kotlinx.datetime.TimeZone
import kotlinx.datetime.toLocalDateTime
import java.io.File
import java.util.concurrent.TimeUnit
import kotlin.time.Clock
import kotlin.time.ExperimentalTime

/**
 * Dump adb logcat output to a file. The ADB logcat dump (-d) command will dump to a file on the Android emulator/device,
 * this function runs that command, then uses the adb pull command to copy it to the adb host, and deletes the temporary
 * file.
 *
 * @param adbPath the path to the adb command
 * @param destFile
 */
@OptIn(ExperimentalTime::class)
fun dumpLogcatToFile(
    adbPath: File,
    destFile: File,
) {
    val dateTimeNow = Clock.System.now().toLocalDateTime(TimeZone.currentSystemDefault())
    val tmpFileName = "/sdcard/${dateTimeNow.fileNameSuffix()}.txt"

    ProcessBuilder(listOf(adbPath.absolutePath, "logcat", "-d", "-f", tmpFileName)).start()
        .waitFor(2_000, TimeUnit.MILLISECONDS)

    ProcessBuilder(
        listOf(adbPath.absolutePath, "pull", tmpFileName, destFile.absolutePath)
    ).start().waitFor(2_000, TimeUnit.MILLISECONDS)

    ProcessBuilder(
        listOf(adbPath.absolutePath, "shell", "rm", tmpFileName)
    ).start().waitFor(2_000, TimeUnit.MILLISECONDS)

}