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package org.sourcelab.github.client.request;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Objects;

/**
 * For defining Request Parameters.
 */
public class RequestParameter {
    private String name;
    private Collection values;

    /**
     * Constructor.
     * @param name Name of the parameter.
     * @param values One or more values associated with the parameter.
     */
    public RequestParameter(final String name, final Collection values) {
        this.name = Objects.requireNonNull(name);
        this.values = Collections.unmodifiableCollection(new ArrayList<>(Objects.requireNonNull(values)));
    }

    /**
     * Constructor.
     * @param name Name of the parameter.
     * @param value Value associated with the parameter.
     */
    public RequestParameter(final String name, final String value) {
        this.name = name;
        Objects.requireNonNull(value);

        final List values = new ArrayList<>();
        values.add(value);
        this.values = Collections.unmodifiableCollection(values);
    }

    /**
     * Name of the parameter.
     * @return Name of the parameter.
     */
    public String getName() {
        if (getValues().size() > 1) {
            return name + "[]";
        }
        return name;
    }

    /**
     * Value(s) associated with the parameter.
     * @return Value(s) associated with the parameter.
     */
    public Collection getValues() {
        return values;
    }

    @Override
    public String toString() {
        return "RequestParameter{"
            + "name='" + name + '\''
            + ", values=" + values
            + '}';
    }
}