/*
    AV-Direktor - Control OMXPlayer on Raspberry Pi via HTTP
    Copyright (C) 2021  Ulrich Hilger

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

package de.uhilger.calypso.handler;

import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.logging.Logger;

/**
 *
 * @author ulrich
 */
public class FileHandler implements HttpHandler {
  
  private static final Logger logger = Logger.getLogger(FileHandler.class.getName());
  
  private final String basePath;
  
  public FileHandler(String basePath) {
    this.basePath = basePath;
  }

  @Override
  public void handle(HttpExchange t) throws IOException {
    String ctxPath = t.getHttpContext().getPath();
    String uriPath = t.getRequestURI().getPath();
    String fName = uriPath.substring(ctxPath.length());
    if(fName.endsWith("/")) {
      fName += "index.html";
    }
    OutputStream os = t.getResponseBody();
    File file = new File(basePath, fName);
    if(file.exists()) {    
      t.sendResponseHeaders(200, file.length());
      InputStream in = new FileInputStream(file);
      int b = in.read();
      while(b > -1) {
        os.write(b);
        b = in.read();
      }
      in.close();
    } else {
      String response = fName + " not found.";
      byte[] bytes = response.getBytes(StandardCharsets.UTF_8);
      t.sendResponseHeaders(404, bytes.length);
      os.write(bytes);
    }
    os.flush();
    os.close();    
  }
  
}