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package io.muserver.openapi;

import java.io.IOException;
import java.io.Writer;
import java.util.List;
import java.util.Map;
import java.util.Set;

import static io.muserver.openapi.Jsonizer.append;
import static java.util.stream.Collectors.toSet;

/**
 * @see PathItemObjectBuilder
 */
public class PathItemObject implements JsonWriter {

    private final String summary;
    private final String description;
    private final Map operations;
    private final List servers;
    private final List parameters;

    PathItemObject(String summary, String description, Map operations,
                          List servers, List parameters) {
        if (parameters != null) {
            Set nameIns = parameters.stream().map(p -> p.name() + "\0" + p.in()).collect(toSet());
            if (nameIns.size() != parameters.size()) {
                throw new IllegalArgumentException("Got duplicate parameter name and locations in " + parameters);
            }
        }
        this.summary = summary;
        this.description = description;
        this.operations = operations;
        this.servers = servers;
        this.parameters = parameters;
    }

    @Override
    public void writeJson(Writer writer) throws IOException {
        writer.write('{');
        boolean isFirst = true;
        isFirst = append(writer, "summary", summary, isFirst);
        isFirst = append(writer, "description", description, isFirst);
        if (operations != null) {
            for (String method : new String[]{"get", "put", "post", "delete", "options", "head", "patch", "trace"}) {
                isFirst = append(writer, method, operations.get(method), isFirst);
            }
        }
        isFirst = append(writer, "servers", servers, isFirst);
        isFirst = append(writer, "parameters", parameters, isFirst);
        writer.write('}');
    }

    /**
     * @return the value described by {@link PathItemObjectBuilder#withSummary}
     */
    public String summary() {
        return summary;
    }

    /**
      @return the value described by {@link PathItemObjectBuilder#withDescription}
     */
    public String description() {
        return description;
    }

    /**
      @return the value described by {@link PathItemObjectBuilder#withOperations}
     */
    public Map operations() {
        return operations;
    }

    /**
      @return the value described by {@link PathItemObjectBuilder#withServers}
     */
    public List servers() {
        return servers;
    }

    /**
      @return the value described by {@link PathItemObjectBuilder#withParameters}
     */
    public List parameters() {
        return parameters;
    }
}