package net.sergeych.bintools

import kotlinx.serialization.KSerializer
import kotlinx.serialization.json.Json
import kotlinx.serialization.serializer
import kotlin.reflect.KType
import kotlin.reflect.typeOf

/**
 * Experimental interface for packing and unpacking binary formats.
 * Initial support intended for BiPack and BOSS to make it fast replaceable.
 * Also, JSON text version with binary converter is presented by default.
 */
interface MotherPacker {
    fun <T>pack(type: KType, payload: T): ByteArray
    fun <T>unpack(type: KType,packed: ByteArray): T
}

inline fun <reified T>MotherPacker.pack(payload: T) = pack(typeOf<T>(), payload)
inline fun <reified T>MotherPacker.unpack(packed: ByteArray) = unpack<T>(typeOf<T>(), packed)

class JsonPacker : MotherPacker {
    override fun <T> pack(type: KType, payload: T): ByteArray {
        return Json.encodeToString(serializer(type), payload).encodeToByteArray()
    }

    override fun <T> unpack(type: KType, packed: ByteArray): T {
        return Json.decodeFromString<T>(
            serializer(type) as KSerializer<T>,
            packed.decodeToString()
        )
    }
}