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package com.easypost.model;

import com.easypost.net.EasyPostResource;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;

import java.lang.reflect.Type;

public final class RateDeserializer implements JsonDeserializer {
    /**
     * Deserialize a Rate from a JSON object.
     *
     * @param json    JSON object.
     * @param typeOfT Type of the object.
     * @param context Deserialization context.
     * @return Deserialized Rate object.
     * @throws JsonParseException if the JSON object is not a valid Rate.
     */
    @Override
    public Rate deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context)
            throws JsonParseException {
        JsonObject jo = (JsonObject) json;

        String currency;
        JsonElement currencyJsonElement = jo.get("currency");
        if (currencyJsonElement == null || currencyJsonElement.isJsonNull()) {
            currency = null;
        } else {
            currency = jo.get("currency").getAsString();
        }

        Float listRate;
        JsonElement listRateJsonElement = jo.get("list_rate");
        if (listRateJsonElement == null || listRateJsonElement.isJsonNull()) {
            listRate = null;
        } else {
            listRate = jo.get("list_rate").getAsFloat();
        }

        String listCurrency;
        JsonElement listCurrencyJsonElement = jo.get("list_currency");
        if (listCurrencyJsonElement == null || listCurrencyJsonElement.isJsonNull()) {
            listCurrency = null;
        } else {
            listCurrency = jo.get("list_currency").getAsString();
        }

        Float retailRate;
        JsonElement retailRateJsonElement = jo.get("retail_rate");
        if (retailRateJsonElement == null || retailRateJsonElement.isJsonNull()) {
            retailRate = null;
        } else {
            retailRate = jo.get("retail_rate").getAsFloat();
        }

        String retailCurrency;
        JsonElement retailCurrencyJsonElement = jo.get("retail_currency");
        if (retailCurrencyJsonElement == null || retailCurrencyJsonElement.isJsonNull()) {
            retailCurrency = null;
        } else {
            retailCurrency = jo.get("retail_currency").getAsString();
        }

        Number deliveryDays;
        JsonElement deliveryDaysJsonElement = jo.get("delivery_days");
        if (deliveryDaysJsonElement == null || deliveryDaysJsonElement.isJsonNull()) {
            deliveryDays = null;
        } else {
            deliveryDays = jo.get("delivery_days").getAsNumber();
        }

        String deliveryDate;
        JsonElement deliveryDateJsonElement = jo.get("delivery_date");
        if (deliveryDateJsonElement == null || deliveryDateJsonElement.isJsonNull()) {
            deliveryDate = null;
        } else {
            deliveryDate = jo.get("delivery_date").getAsString();
        }

        Boolean deliveryDateGuaranteed;
        JsonElement deliveryDateGuaranteedJsonElement = jo.get("delivery_date_guaranteed");
        if (deliveryDateGuaranteedJsonElement == null || deliveryDateGuaranteedJsonElement.isJsonNull()) {
            deliveryDateGuaranteed = false;
        } else {
            deliveryDateGuaranteed = jo.get("delivery_date_guaranteed").getAsBoolean();
        }

        Number estDeliveryDays;
        JsonElement estDeliveryDaysJsonElement = jo.get("est_delivery_days");
        if (estDeliveryDaysJsonElement == null || estDeliveryDaysJsonElement.isJsonNull()) {
            estDeliveryDays = null;
        } else {
            estDeliveryDays = jo.get("est_delivery_days").getAsNumber();
        }

        String shipmentID;
        JsonElement shipmentIdJsonElement = jo.get("shipment_id");
        if (shipmentIdJsonElement == null || shipmentIdJsonElement.isJsonNull()) {
            shipmentID = null;
        } else {
            shipmentID = jo.get("shipment_id").getAsString();
        }

        @SuppressWarnings ("unused") TimeInTransit timeInTransit;
        JsonElement timeInTransitJsonElement = jo.get("time_in_transit");
        if (timeInTransitJsonElement == null || timeInTransitJsonElement.isJsonNull()) {
            timeInTransit = null;
        } else {
            timeInTransit = EasyPostResource.GSON.fromJson(timeInTransitJsonElement, TimeInTransit.class);
        }

        Rate rate = new Rate();
        rate.setId(jo.get("id").getAsString());
        String carrier = jo.get("carrier").getAsString();
        rate.setCarrier(carrier);
        String service = jo.get("service").getAsString();
        rate.setService(service);
        rate.setServiceCode(carrier.toLowerCase() + "." + service.toLowerCase());
        rate.setRate(jo.get("rate").getAsFloat());
        rate.setCurrency(currency);
        rate.setListRate(listRate);
        rate.setListCurrency(listCurrency);
        rate.setRetailRate(retailRate);
        rate.setRetailCurrency(retailCurrency);
        rate.setDeliveryDays(deliveryDays);
        rate.setDeliveryDate(deliveryDate);
        rate.setDeliveryDateGuaranteed(deliveryDateGuaranteed);
        rate.setEstDeliveryDays(estDeliveryDays);
        rate.setShipmentId(shipmentID);
        rate.setCarrierAccountId(jo.get("carrier_account_id").getAsString());

        return rate;
    }
}