package net.nprod.vega4k.model

import kotlinx.serialization.KSerializer
import kotlinx.serialization.Serializable
import kotlinx.serialization.SerializationException
import kotlinx.serialization.descriptors.PrimitiveKind
import kotlinx.serialization.descriptors.PrimitiveSerialDescriptor
import kotlinx.serialization.descriptors.SerialDescriptor
import kotlinx.serialization.encoding.Decoder
import kotlinx.serialization.encoding.Encoder

object ColorOrSignalSerializer : KSerializer<ColorOrSignal> {
    override fun deserialize(decoder: Decoder): ColorOrSignal {
        return try {
            Color(decoder.decodeString())
        } catch (e: SerializationException) {
            val value = decoder.decodeSerializableValue(ColorSignal.serializer())
            value
        }
    }

    override val descriptor: SerialDescriptor
        get() = PrimitiveSerialDescriptor("background", PrimitiveKind.STRING)

    override fun serialize(encoder: Encoder, value: ColorOrSignal) {
        when (value) {
            is Color -> encoder.encodeString(value.value)
            is ColorSignal -> encoder.encodeSerializableValue(ColorSignal.serializer(), value)
        }
    }
}

@Serializable(with = ColorOrSignalSerializer::class)
interface ColorOrSignal

@Serializable
inline class Color(val value: String) : ColorOrSignal

@Serializable
data class ColorSignal(
    val signal: String
) : ColorOrSignal