package moe.yuuta.workmode.access

import android.content.Context
import android.os.Bundle
import android.os.Parcel
import android.os.PersistableBundle
import com.crashlytics.android.Crashlytics
import com.crashlytics.android.answers.Answers
import com.crashlytics.android.answers.CustomEvent
import com.elvishew.xlog.Logger
import com.elvishew.xlog.XLog
import eu.chainfire.librootjava.RootJava
import eu.chainfire.libsuperuser.Shell
import moe.yuuta.workmode.BuildConfig
import moe.yuuta.workmode.Setup
import moe.yuuta.workmode.suspend.data.ListMode
import moe.yuuta.workmode.suspend.data.Status
import moe.yuuta.workmode.suspend.data.SuspendedStorage
import moe.yuuta.workmode.utils.ByteArraySerializer

/**
 * The high-level API accessor, as known as the launcher (starter) of the accessor, wraps
 * the necessary start steps to launch it and deserialize the result.
 */
open class AccessorStarter(private val mContext: Context, private val mLogPath: String) {
    private val logger: Logger = XLog.tag("AccessorStarter").build()

    companion object {
        const val ACTION_UPDATE_UI_STATE = "moe.yuuta.workmode.access.ACTION_UPDATE_UI_STATE"
        const val ACTION_UPDATE_UI_PROGRESS = "moe.yuuta.workmode.access.ACTION_UPDATE_UI_PROGRESS"
        const val EXTRA_SHOW_PROGRESS = "moe.yuuta.workmode.access.EXTRA_SHOW_PROGRESS"
    }

    private fun launchRootProcess(root: Boolean, vararg args: String): MutableList<String> {
        val command = RootJava.getLaunchScript(mContext,
                WorkModeAccessor::class.java,
                null,
                null,
                args,
                BuildConfig.APPLICATION_ID + ":accessor")

        return if (root) {
            Shell.SU.run(command)
        } else {
            Shell.SH.run(command)
        }
    }

    fun getSuspendedPackageAppExtras(packageName: String, root: Boolean): Bundle? {
        val argumentParcel: Parcel = Parcel.obtain()
        try {
            argumentParcel.writeString(mLogPath)
            argumentParcel.writeString(WorkModeAccessor.ACTION_GET_APP_EXTRAS)
            argumentParcel.writeString(packageName)
            val marshalledResult = launchRootProcess(root,
                    ByteArraySerializer.serialize(argumentParcel.marshall()))[0]
            val result = deserialize(ByteArraySerializer.deserialize(marshalledResult))
            val bundle = result.readBundle()
            result.recycle()
            return bundle
        } finally {
            argumentParcel.recycle()
        }
    }

    fun getSuspendedPackageLauncherExtras(packageName: String, root: Boolean): Bundle? {
        val argumentParcel: Parcel = Parcel.obtain()
        try {
            argumentParcel.writeString(mLogPath)
            argumentParcel.writeString(WorkModeAccessor.ACTION_GET_LAUNCHER_EXTRAS)
            argumentParcel.writeString(packageName)
            val marshalledResult = launchRootProcess(root,
                    ByteArraySerializer.serialize(argumentParcel.marshall()))[0]
            val result = deserialize(ByteArraySerializer.deserialize(marshalledResult))
            val bundle = result.readBundle()
            result.recycle()
            return bundle
        } finally {
            argumentParcel.recycle()
        }
    }

    fun isPackageSuspended(packageNames: Array<out String>, root: Boolean): Boolean {
        val argumentParcel: Parcel = Parcel.obtain()
        try {
            argumentParcel.writeString(mLogPath)
            argumentParcel.writeString(WorkModeAccessor.ACTION_IS_SUSPENDED)
            argumentParcel.writeStringArray(packageNames)
            val marshalledResult = launchRootProcess(root,
                    WorkModeAccessor.ACTION_IS_SUSPENDED,
                    ByteArraySerializer.serialize(argumentParcel.marshall()))[0]

            val result = deserialize(ByteArraySerializer.deserialize(marshalledResult))
            val isSuspended = result.readByte() == 1.toByte()
            result.recycle()
            return isSuspended
        } finally {
            argumentParcel.recycle()
        }
    }

    fun dump(packageName: String, root: Boolean): DumpResult {
        val argumentParcel: Parcel = Parcel.obtain()
        try {
            argumentParcel.writeString(mLogPath)
            argumentParcel.writeString(WorkModeAccessor.ACTION_DUMP)
            argumentParcel.writeString(packageName)
            val marshalledResult = launchRootProcess(root,
                    ByteArraySerializer.serialize(argumentParcel.marshall()))[0]
            val result = deserialize(ByteArraySerializer.deserialize(marshalledResult))
            val data = DumpResult(
                    result.readByte() == 1.toByte(),
                    result.readBundle(),
                    result.readBundle()
            )
            result.recycle()
            return data
        } finally {
            argumentParcel.recycle()
        }
    }

    fun setPackagesSuspended(packageNames: Array<String>, suspended: Boolean,
                             appExtras: PersistableBundle, launcherExtras: PersistableBundle,
                             dialogMessage: String, root: Boolean): Array<String> {
        val argumentParcel: Parcel = Parcel.obtain()
        try {
            argumentParcel.writeString(mLogPath)
            argumentParcel.writeString(WorkModeAccessor.ACTION_SET_SUSPENDED)
            argumentParcel.writeStringArray(packageNames)
            argumentParcel.writeByte(if (suspended) 1 else 0)
            argumentParcel.writeBundle(Bundle(appExtras))
            argumentParcel.writeBundle(Bundle(launcherExtras))
            argumentParcel.writeString(dialogMessage)
            val marshalledResult = launchRootProcess(root,
                    ByteArraySerializer.serialize(argumentParcel.marshall()))[0]
            val result = deserialize(ByteArraySerializer.deserialize(marshalledResult))
            val rs = result.createStringArray() ?: arrayOf()
            result.recycle()
            return rs
        } finally {
            argumentParcel.recycle()
        }
    }

    @Throws(Throwable::class)
    private fun deserialize(byteArray: ByteArray): Parcel {
        val result = Parcel.obtain()
        result.unmarshall(byteArray, 0, byteArray.size)
        // Thanks to https://github.com/jiaminghan/droidplanner-master/blob/743b5436df6311cbbbfdecd21f796e2b948cbac7/Android/src/com/o3dr/services/android/lib/util/ParcelableUtils.java#L35
        result.setDataPosition(0)
        when (result.readByte()) {
            1.toByte() -> {
            }
            0.toByte() -> {
                val throwable = result.readSerializable() as Throwable?
                if (throwable != null) {
                    throw throwable
                }
                throw RuntimeException("Unsuccessful result with unknown stacktrace")
            }
            // If server returns this code, which means the task is successfully executed but
            // it had detected that the app was cracked.
            // #Anti-Crack
            2.toByte() -> {
                // The ID is used to prevent from multiple reporting.
                val id = result.readString()
                val reportTimes = SuspendedStorage(mContext).getStorage().getInt("c_$id", 0)
                SuspendedStorage(mContext).getStorage().edit()
                        .putInt("c_$id", reportTimes + 1)
                        .apply()
                if (reportTimes <= 0) {
                    val reason = result.readString()
                    Runnable {
                        Runnable {
                            if (Setup.FABRIC_ENABLE)
                                Runnable {
                                    Answers.getInstance().logCustom(CustomEvent("St.rf.pa.")
                                            .putCustomAttribute("rn", reason))
                                    Crashlytics.log("Sf. $reason")
                                }.run()
                        }.run()
                    }.run()
                }
            }
        }
        return result
    }

    fun getPackagesSuspendedByWorkMode(root: Boolean): List<String> {
        val argumentParcel: Parcel = Parcel.obtain()
        try {
            argumentParcel.writeString(mLogPath)
            argumentParcel.writeString(WorkModeAccessor.ACTION_GET_ALL_PACKAGES_SUSPENDED_BY_WORK_MODE)
            val marshalledResult = launchRootProcess(root,
                    ByteArraySerializer.serialize(argumentParcel.marshall()))[0]
            val result = deserialize(ByteArraySerializer.deserialize(marshalledResult))
            val data = result.createStringArrayList()
            result.recycle()
            return data ?: listOf()
        } finally {
            argumentParcel.recycle()
        }
    }

    fun apply(suspendList: Array<String>, listMode: ListMode, status: Status, root: Boolean) {
        val argumentParcel: Parcel = Parcel.obtain()
        try {
            argumentParcel.writeString(mLogPath)
            argumentParcel.writeString(WorkModeAccessor.ACTION_APPLY)
            argumentParcel.writeStringArray(suspendList)
            argumentParcel.writeInt(when (listMode) {
                ListMode.BLACKLIST -> 1
                ListMode.WHITELIST -> 2
            })
            argumentParcel.writeInt(when (status) {
                Status.ON -> 1
                Status.OFF -> 2
            })
            val marshalledResult = launchRootProcess(root,
                    ByteArraySerializer.serialize(argumentParcel.marshall()))[0]
            val result = deserialize(ByteArraySerializer.deserialize(marshalledResult))
            result.recycle()
        } finally {
            argumentParcel.recycle()
        }
    }
}