/**
 * Copyright (c) 2011-2013, James Zhan 詹波 (jfinal@126.com).
 *
 * 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 net.tooan.ynpay.third.jfinal.render;

import net.tooan.ynpay.third.jfinal.core.Const;

import java.io.IOException;
import java.io.PrintWriter;

/**
 * ErrorRender.
 */
public class ErrorRender extends Render {

    private static final long serialVersionUID = -7175292712918557096L;
    protected static final String contentType = "text/html;charset=" + getEncoding();

    protected static final String html404 = "<html><head><title>404 Not Found</title></head><body bgcolor='white'><center><h1>404 Not Found</h1></center><hr><center><a href='http://www.jfinal.com'>JFinal/" + Const.JFINAL_VERSION + "</a></center></body></html>";
    protected static final String html500 = "<html><head><title>500 Internal Server Error</title></head><body bgcolor='white'><center><h1>500 Internal Server Error</h1></center><hr><center><a href='http://www.jfinal.com'>JFinal/" + Const.JFINAL_VERSION + "</a></center></body></html>";

    protected static final String html401 = "<html><head><title>401 Unauthorized</title></head><body bgcolor='white'><center><h1>401 Unauthorized</h1></center><hr><center><a href='http://www.jfinal.com'>JFinal/" + Const.JFINAL_VERSION + "</a></center></body></html>";
    protected static final String html403 = "<html><head><title>403 Forbidden</title></head><body bgcolor='white'><center><h1>403 Forbidden</h1></center><hr><center><a href='http://www.jfinal.com'>JFinal/" + Const.JFINAL_VERSION + "</a></center></body></html>";

    protected int errorCode;

    public ErrorRender(int errorCode, String view) {
        this.errorCode = errorCode;
        this.view = view;
    }

    public void render() {
        response.setStatus(getErrorCode());    // HttpServletResponse.SC_XXX_XXX

        // render with view
        String view = getView();
        if (view != null) {
            RenderFactory.me().getRender(view).setContext(request, response).render();
            return;
        }

        // render with html content
        PrintWriter writer = null;
        try {
            response.setContentType(contentType);
            writer = response.getWriter();
            writer.write(getErrorHtml());
            writer.flush();
        } catch (IOException e) {
            throw new RenderException(e);
        } finally {
            if (writer != null)
                writer.close();
        }
    }

    public String getErrorHtml() {
        int errorCode = getErrorCode();
        if (errorCode == 404)
            return html404;
        else if (errorCode == 500)
            return html500;
        else if (errorCode == 401)
            return html401;
        else if (errorCode == 403)
            return html403;
        else
            return "<html><head><title>" + errorCode + " Error</title></head><body bgcolor='white'><center><h1>" + errorCode + " Error</h1></center><hr><center><a href='http://www.jfinal.com'>JFinal/" + Const.JFINAL_VERSION + "</a></center></body></html>";
    }

    public int getErrorCode() {
        return errorCode;
    }
}