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package org.rythmengine.spring.web.result;

/*-
 * #%L
 * Spring Rythm Plugin
 * %%
 * Copyright (C) 2017 - 2018 OSGL (Open Source General Library)
 * %%
 * 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.
 * #L%
 */

import org.osgl.util.E;
import org.osgl.util.IO;
import org.osgl.util.S;
import org.osgl.web.util.UserAgent;
import org.rythmengine.spring.web.UADetector;
import org.springframework.http.HttpStatus;
import org.springframework.web.servlet.ModelAndView;

import java.io.IOException;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;

public class JSONResult extends Result {

    private String json;

    private Map objects;

    private Object object;

    private Object[] array;

    public JSONResult(String json) {
        super(HttpStatus.OK);
        E.illegalArgumentIf(S.blank(json));
        this.json = json;
    }

    public JSONResult(Map objects) {
        super(HttpStatus.OK);
        E.NPE(objects);
        this.objects = objects;
    }

    public JSONResult(Object object) {
        super(HttpStatus.OK);
        E.NPE(object);
        this.object = object;
    }

    public JSONResult(Object... array) {
        super(HttpStatus.OK);
        E.NPE(array);
        this.array = array;
    }

    @Override
    protected ModelAndView writeToResponse(HttpServletResponse response, int statusCode, String message) throws IOException {
        UserAgent ua = UADetector.get();
        response.setContentType(null != ua && ua.isIE9Down() ? "text/plain" : "application/json");
        if (null != objects) {
            json = com.alibaba.fastjson.JSON.toJSONString(objects);
        } else if (null != object) {
            json = com.alibaba.fastjson.JSON.toJSONString(object);
        } else if (null != array) {
            json = com.alibaba.fastjson.JSON.toJSONString(array);
        }
        IO.write(json, response.getWriter());
        return new ModelAndView();
    }
}