package org.fdroid.index.v1

import kotlinx.serialization.KSerializer
import kotlinx.serialization.SerialName
import kotlinx.serialization.Serializable
import kotlinx.serialization.descriptors.buildClassSerialDescriptor
import kotlinx.serialization.descriptors.element
import kotlinx.serialization.encoding.Decoder
import kotlinx.serialization.encoding.Encoder
import kotlinx.serialization.json.JsonDecoder
import kotlinx.serialization.json.intOrNull
import kotlinx.serialization.json.jsonArray
import kotlinx.serialization.json.jsonPrimitive

@Serializable
public data class PackageV1(
    val added: Long? = null,
    val apkName: String,
    val hash: String,
    val hashType: String, // TODO enum?
    val minSdkVersion: Int? = null,
    val maxSdkVersion: Int? = null,
    val targetSdkVersion: Int? = minSdkVersion,
    val packageName: String,
    val sig: String? = null,
    val signer: String? = null,
    val size: Long,
    @SerialName("srcname")
    val srcName: String? = null,
    @SerialName("uses-permission")
    val usesPermission: List<PermissionV1> = emptyList(),
    @SerialName("uses-permission-sdk-23")
    val usesPermission23: List<PermissionV1> = emptyList(),
    val versionCode: Long? = null,
    val versionName: String,
    @SerialName("nativecode")
    val nativeCode: List<String>? = null,
    val features: List<String>? = null,
    val antiFeatures: List<String>? = null,
)

@Serializable(with = PermissionV1Serializer::class)
public data class PermissionV1(
    val name: String,
    val maxSdk: Int?,
)

internal class PermissionV1Serializer : KSerializer<PermissionV1> {
    override val descriptor = buildClassSerialDescriptor("PermissionV1") {
        element<String>("name")
        element<Int?>("maxSdk")
    }

    override fun deserialize(decoder: Decoder): PermissionV1 {
        val jsonInput = decoder as? JsonDecoder ?: error("Can be deserialized only by JSON")
        val jsonArray = jsonInput.decodeJsonElement().jsonArray
        if (jsonArray.size != 2) throw IllegalArgumentException()
        val name = jsonArray[0].jsonPrimitive.content
        val maxSdk = jsonArray[1].jsonPrimitive.intOrNull
        return PermissionV1(name, maxSdk)
    }

    override fun serialize(encoder: Encoder, value: PermissionV1) {
        TODO("Not yet implemented")
    }

}