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/*
 * Copyright 2017-2020 original authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micronaut.http.simple;

import io.micronaut.core.convert.ArgumentConversionContext;
import io.micronaut.core.convert.ConversionService;
import io.micronaut.core.convert.value.ConvertibleMultiValuesMap;
import io.micronaut.http.MutableHttpParameters;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * Simple implementation of {@link MutableHttpParameters}.
 *
 * @author Graeme Rocher
 * @author Vladimir Orany
 *
 * @since 1.0
 */
public class SimpleHttpParameters implements MutableHttpParameters {

    private final Map> valuesMap;
    private final ConvertibleMultiValuesMap values;

    /**
     * @param values The parameter values
     * @param conversionService The conversion service
     */
    public SimpleHttpParameters(Map> values, ConversionService conversionService) {
        this.valuesMap = values;
        this.values = new ConvertibleMultiValuesMap<>(this.valuesMap, conversionService);
    }

    /**
     * @param conversionService The conversion service
     */
    public SimpleHttpParameters(ConversionService conversionService) {
        this(new LinkedHashMap<>(), conversionService);
    }

    @Override
    public Set names() {
        return values.names();
    }

    @Override
    public Collection> values() {
        return values.values();
    }

    @Override
    public List getAll(CharSequence name) {
        return values.getAll(name);
    }

    @Override
    public String get(CharSequence name) {
        return values.get(name);
    }

    @Override
    public  Optional get(CharSequence name, ArgumentConversionContext conversionContext) {
        return values.get(name, conversionContext);
    }

    @Override
    public MutableHttpParameters add(CharSequence name, List values) {
        valuesMap.put(name, values.stream().map(v -> v == null ? null : v.toString()).collect(Collectors.toList()));
        return this;
    }

    @Override
    public void setConversionService(ConversionService conversionService) {
        values.setConversionService(conversionService);
    }
}