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package io.sphere.internal.request;

import com.google.common.base.Optional;
import io.sphere.client.CommandRequest;
import io.sphere.client.FetchRequest;
import io.sphere.client.QueryRequest;
import io.sphere.client.SearchRequest;
import io.sphere.client.filters.expressions.FilterExpression;
import io.sphere.client.model.QueryResult;
import io.sphere.client.model.SearchResult;
import io.sphere.client.model.products.BackendProduct;
import io.sphere.client.model.products.BackendProductProjection;
import io.sphere.client.shop.ApiMode;
import io.sphere.client.shop.CategoryTree;
import io.sphere.client.shop.model.Product;
import io.sphere.internal.command.Command;
import org.codehaus.jackson.type.TypeReference;

import javax.annotation.Nonnull;
import java.util.Locale;

/** Converts products from the raw {@link io.sphere.client.model.products.BackendProductProjection} to {@link Product}. */
public class ProductRequestFactoryImpl implements ProductRequestFactory {
    private final RequestFactory underlyingRequestFactory;
    private final CategoryTree categoryTree;

    public ProductRequestFactoryImpl(@Nonnull RequestFactory underlyingRequestFactory, @Nonnull CategoryTree categoryTree) {
        if (underlyingRequestFactory == null) throw new NullPointerException("underlyingRequestFactory");
        if (categoryTree == null) throw new NullPointerException("categoryTree");
        this.underlyingRequestFactory = underlyingRequestFactory;
        this.categoryTree = categoryTree;
    }

    private static final TypeReference productProjectionTypeRef = new TypeReference() {};
    private static final TypeReference productTypeRef = new TypeReference() {};
    private static final TypeReference> queryProductTypeRef = new TypeReference>() {};
    private static final TypeReference> searchProductTypeRef = new TypeReference>() {};

    @Override public FetchRequest createFetchRequest(String url, ApiMode apiMode) {
        return new ProductFetchRequest(underlyingRequestFactory.createFetchRequest(url, Optional.of(apiMode), productProjectionTypeRef), categoryTree);
    }

    @Override public FetchRequest createFetchRequestBasedOnQuery(String url, ApiMode apiMode) {
        return new ProductFetchRequest(underlyingRequestFactory.createFetchRequestBasedOnQuery(url, Optional.of(apiMode), queryProductTypeRef), categoryTree);
    }

    @Override public SearchRequest createSearchRequest(String url, ApiMode apiMode, Iterable filters, Locale locale) {
        return new ProductSearchRequest(underlyingRequestFactory.createSearchRequest(url, Optional.of(apiMode), filters, searchProductTypeRef, locale), categoryTree);
    }

    @Override public QueryRequest createQueryRequest(String url, ApiMode apiMode) {
        QueryRequest queryRequest = underlyingRequestFactory.createQueryRequest(url, Optional.of(apiMode), queryProductTypeRef);
        return new ProductQueryRequest(queryRequest, categoryTree);
    }

    @Override public CommandRequest createCommandRequest(String url, ApiMode apiMode, Command command) {
       CommandRequest commandRequest = underlyingRequestFactory.createCommandRequest(url, command, productTypeRef);
        return new ProductCommandRequest(categoryTree, commandRequest, apiMode);
    }
}