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/*******************************************************************************
 * Copyright (C) 2022-2023 WaveMaker, Inc.
 *
 * 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 com.wavemaker.runtime.rest.builder;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.Map;

import org.apache.http.HttpRequest;
import org.apache.http.auth.AuthenticationException;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.message.BasicHttpRequest;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;

import com.wavemaker.commons.WMRuntimeException;
import com.wavemaker.runtime.rest.RestConstants;
import com.wavemaker.runtime.rest.model.HttpRequestDetails;
import com.wavemaker.runtime.rest.model.Message;
import com.wavemaker.runtime.rest.util.HttpRequestUtils;

/**
 * Created by ArjunSahasranam on 3/9/15.
 */
public class HttpRequestDetailsBuilder {

    private HttpRequestDetails httpRequestDetails;

    private Object requestBody;

    private HttpRequestDetailsBuilder(HttpRequestDetails httpRequestDetails) {
        this.httpRequestDetails = httpRequestDetails;
    }

    public static HttpRequestDetailsBuilder create() {
        return new HttpRequestDetailsBuilder(new HttpRequestDetails());
    }

    public static HttpRequestDetailsBuilder create(String endPointAddress) {
        return create().setEndpointAddress(endPointAddress);
    }

    public HttpRequestDetailsBuilder setRedirectEnabled(final boolean redirectEnabled) {
        httpRequestDetails.setRedirectEnabled(redirectEnabled);
        return this;
    }

    public HttpRequestDetailsBuilder setHeaders(HttpHeaders headers) {
        httpRequestDetails.getHeaders().putAll(headers);
        return this;
    }

    public HttpRequestDetailsBuilder setMethod(final String method) {
        httpRequestDetails.setMethod(method);
        return this;
    }

    public HttpRequestDetailsBuilder setRequestBody(final Object requestBody) {
        this.requestBody = requestBody;
        return this;
    }

    public HttpRequestDetailsBuilder setEndpointAddress(final String endpointAddress) {
        httpRequestDetails.setEndpointAddress(endpointAddress);
        return this;
    }

    public HttpRequestDetailsBuilder setBasicAuthorization(final String authorization) {
        httpRequestDetails.getHeaders().set(RestConstants.AUTHORIZATION, authorization);
        return this;
    }

    public HttpRequestDetailsBuilder setBasicAuthorization(String username, String password) {
        UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(username, password);
        HttpRequest httpRequest = new BasicHttpRequest(httpRequestDetails.getMethod(), httpRequestDetails.getEndpointAddress());
        String authorization = null;
        try {
            authorization = new BasicScheme(StandardCharsets.UTF_8).authenticate(credentials, httpRequest, null).getValue();
        } catch (AuthenticationException e) {
            throw new WMRuntimeException(e);
        }
        return setBasicAuthorization(authorization);
    }

    public HttpRequestDetailsBuilder setContentType(final String contentType) {
        httpRequestDetails.getHeaders().set(HttpHeaders.CONTENT_TYPE, contentType);
        return this;
    }

    public HttpRequestDetails build() {
        if (requestBody != null) {
            InputStream inputStream;
            if (requestBody instanceof byte[]) {
                inputStream = new ByteArrayInputStream((byte[]) requestBody);
            } else if (requestBody instanceof String) {
                inputStream = new ByteArrayInputStream(((String) requestBody).getBytes());
            } else if (requestBody instanceof Map) {
                String contentType = httpRequestDetails.getHeaders().getContentType().toString();
                Message message;
                if (MediaType.APPLICATION_FORM_URLENCODED_VALUE.equals(contentType)) {
                    message = HttpRequestUtils.getFormMessage((Map) requestBody);
                } else if (MediaType.MULTIPART_FORM_DATA_VALUE.equals(contentType)) {
                    message = HttpRequestUtils.getMultipartMessage((Map) requestBody);
                } else {
                    throw new IllegalStateException();
                }
                inputStream = message.getInputStream();
                setHeaders(message.getHttpHeaders());
            } else {
                Message message = HttpRequestUtils.getJsonMessage(requestBody);
                inputStream = message.getInputStream();
            }
            httpRequestDetails.setBody(inputStream);
        }
        return httpRequestDetails;
    }
}