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package com.pengrad.telegrambot.utility.gson;

import com.google.gson.*;
import com.pengrad.telegrambot.model.Message;
import com.pengrad.telegrambot.model.message.InaccessibleMessage;
import com.pengrad.telegrambot.model.message.MaybeInaccessibleMessage;

import java.lang.reflect.Type;

public class MaybeInaccessibleMessageTypeAdapter implements JsonDeserializer {

    @Override
    public MaybeInaccessibleMessage deserialize(JsonElement element, Type type, JsonDeserializationContext context) throws JsonParseException {
        JsonObject object = element.getAsJsonObject();
        JsonPrimitive discriminator = object.getAsJsonPrimitive("date");

        if (!discriminator.isJsonNull() && discriminator.getAsInt() != InaccessibleMessage.INACCESSIBLE_MESSAGE_DATE) {
            return context.deserialize(object, Message.class);
        } else {
            return context.deserialize(object, InaccessibleMessage.class);
        }
    }
}