package com.robonobo.midas.controller;

import java.io.*;
import java.util.*;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;

import com.robonobo.midas.model.MidasPlaylist;
import com.robonobo.remote.service.MidasService;

@Controller
public class RecentActivityController extends BaseController {
	@Autowired
	MidasService midas;
	
	/**
	 * Gives stream ids that have been on recently-updated playlists, one per line (text/plain response type)
	 */
	@RequestMapping("/recent-activity")
	public void showStreamIdsOnRecentPlaylists(@RequestParam(value = "maxAgeMs", required = false) Long maxAgeMs,
			HttpServletRequest req, HttpServletResponse resp) throws IOException {
		long tenMinsInMs = (long) (10 * 60 * 1000);
		if(maxAgeMs == null || maxAgeMs > tenMinsInMs)
			maxAgeMs = tenMinsInMs;
		List<MidasPlaylist> playlists = midas.getRecentPlaylists(maxAgeMs);
		Set<String> streamIds = new HashSet<String>();
		StringBuffer sb = new StringBuffer("Returning");
		sb.append(playlists.size()).append(" recently-modified playlists to ");
		sb.append(req.getRemoteAddr());
		boolean first = true;
		for (MidasPlaylist pl : playlists) {
			if(first) {
				sb.append(": ");
				first = false;
			} else
				sb.append(", ");
			sb.append(pl.getTitle()).append("(id ").append(pl.getPlaylistId()).append(")");
			streamIds.addAll(pl.getStreamIds());
		}
		log.info(sb);
		resp.setStatus(HttpServletResponse.SC_OK);
		resp.setContentType("text/plain");
		PrintWriter out = new PrintWriter(resp.getOutputStream());
		for (String sid : streamIds) {
			out.println(sid);
		}
		out.close();
	}
}