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package com.hltech.pact.gen.domain.client.util;

import com.hltech.pact.gen.domain.client.model.Body;
import org.springframework.web.bind.annotation.RequestBody;

import java.lang.reflect.Parameter;
import java.util.Arrays;

public final class RequestBodyExtractor {

    private RequestBodyExtractor() {}

    public static Body extract(Parameter[] parameters) {
        Parameter responseParameter = Arrays.stream(parameters)
            .filter(RequestBodyExtractor::isRequestBody)
            .findFirst()
            .orElse(null);

        return Body.builder()
            .type(responseParameter != null ? responseParameter.getType() : null)
            .genericArgumentTypes(TypeExtractor.extractParameterTypesFromType(
                responseParameter != null ? responseParameter.getParameterizedType() : null))
            .build();
    }

    private static boolean isRequestBody(Parameter parameter) {
        return parameter.getAnnotations().length == 0
            || parameter.isAnnotationPresent(RequestBody.class);
    }
}