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/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * 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
 *
 *     http://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.undertow.servlet.core;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;

import io.undertow.httpcore.BlockingHttpExchange;
import io.undertow.server.HttpServerExchange;
import io.undertow.servlet.handlers.ServletRequestContext;
import io.undertow.servlet.spec.HttpServletRequestImpl;
import io.undertow.servlet.spec.HttpServletResponseImpl;

/**
 * @author Stuart Douglas
 */
public class ServletBlockingHttpExchange implements BlockingHttpExchange {

    private final HttpServerExchange exchange;

    public ServletBlockingHttpExchange(final HttpServerExchange exchange) {
        this.exchange = exchange;
    }

    @Override
    public InputStream getInputStream() {
        ServletRequest request = exchange.getAttachment(ServletRequestContext.ATTACHMENT_KEY).getServletRequest();
        try {
            return request.getInputStream();
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public OutputStream getOutputStream() {
        ServletResponse response = exchange.getAttachment(ServletRequestContext.ATTACHMENT_KEY).getServletResponse();
        try {
            try {
                return response.getOutputStream();
            } catch (IllegalStateException ex) {
                return new WriterOutputStream(exchange, response.getWriter(), response.getCharacterEncoding());
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public void close() throws IOException {
        ServletRequestContext servletRequestContext = exchange.getAttachment(ServletRequestContext.ATTACHMENT_KEY);
        if (!exchange.isComplete()) {
            try {
                HttpServletRequestImpl request = servletRequestContext.getOriginalRequest();
                request.closeAndDrainRequest();
            } finally {
                HttpServletResponseImpl response = servletRequestContext.getOriginalResponse();
                response.closeStreamAndWriter();
            }
        } else {
            try {
                HttpServletRequestImpl request = servletRequestContext.getOriginalRequest();
                request.freeResources();
            } finally {
                HttpServletResponseImpl response = servletRequestContext.getOriginalResponse();
                response.freeResources();
            }
        }
    }
}