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package io.vertx.up.uca.rs.argument;

import io.vertx.core.file.FileSystem;
import io.vertx.ext.web.FileUpload;
import io.vertx.ext.web.RoutingContext;
import io.vertx.up.runtime.ZeroSerializer;
import io.vertx.up.uca.rs.Filler;
import io.vertx.up.unity.Ux;

import java.util.Set;
import java.util.concurrent.ConcurrentMap;

/**
 * 「Co」JSR311 for .@FormParam
 *
 * This `Filler` is for form attributes extracting
 *
 * @author Lang
 */
public class FormFiller implements Filler {

    @Override
    public Object apply(final String name,
                        final Class paramType,
                        final RoutingContext context) {
        /*
         * Set
         */
        final Set uploadSet = context.fileUploads();
        if (uploadSet.isEmpty()) {
            /*
             * Not file parameters ( Without uploading )
             */
            final String value = context.request().getFormAttribute(name);
            return ZeroSerializer.getValue(paramType, value);
        } else {
            final ConcurrentMap> compressed
                = Ux.toFile(uploadSet);
            if (compressed.containsKey(name)) {
                /*
                 * With uploading multi here
                 */
                final Set uploadParam = compressed.get(name);
                final FileSystem fileSystem = context.vertx().fileSystem();
                return Ux.toFile(uploadParam, paramType, fileSystem::readFileBlocking);
            } else {
                /*
                 * Not file parameters ( With uploading )
                 */
                final String value = context.request().getFormAttribute(name);
                return ZeroSerializer.getValue(paramType, value);
            }
        }
    }
}