import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Properties;
import java.util.logging.Logger;

public class PluginChecker {
    /** Minecraft's logger. */
    private static final Logger _logMC = Logger.getLogger("Minecraft");

    protected String[] getPlugins() {
        String strPlugins = etc.getLoader().getPluginList();

        if(strPlugins.length() > 0) {
            return strPlugins.split("(?i)\\s\\(.\\),?");
        } else {
            _logMC.info("No plugins currently enabled.");
            return null;
        }

    }

    public void CheckPlugins() {
        String[] plugins = getPlugins();
        if(plugins == null) return;

        for(String plugin : plugins) {
            if(plugin.length() > 0) {
                Plugin objPlugin = etc.getLoader().getPlugin(plugin);
                InputStream ioManifest = objPlugin.getClass().getResourceAsStream("/plugit.properties");
                if(ioManifest == null) continue;
                Properties manifest = new Properties();
                String remoteManifest = "";
                String version = "";
                try {
                    manifest.load(ioManifest);
                    version = manifest.getProperty("version");
                    remoteManifest = manifest.getProperty("manifest");
                    ioManifest.close();
                    _logMC.info("Checking " + plugin + "(Version: " + version + ") for updates..");
                } catch(IOException e) {
                    continue;
                }

                try {
                    URL urlManifest = new URL(remoteManifest);
                    manifest = new Properties();
                    manifest.load(urlManifest.openStream());
                    if(!version.equalsIgnoreCase(manifest.getProperty("version"))) {
                        _logMC.info("Newer version of " + plugin + " available. Now updating..");
                        URL urlDownload = new URL(manifest.getProperty("binary"));
                        InputStream is = urlDownload.openStream();

                        // Create temporary file.
                        String tmpPath = System.getProperty("user.dir") + File.separator + "plugins" + File.separator + objPlugin.getName() + ".tmp";
                        String pluginPath = System.getProperty("user.dir") + File.separator + "plugins" + File.separator + objPlugin.getName() + ".jar";
                        _logMC.info("Writing new file to " + tmpPath);
                        File outFile = new File(tmpPath);
                        if(outFile.exists()) outFile.delete();
                        outFile.createNewFile();

                        FileOutputStream fos= new FileOutputStream(outFile);
                        int oneChar, count=0;
                        while ((oneChar=is.read()) != -1)
                        {
                            fos.write(oneChar);
                            count++;
                        }
                        is.close();
                        fos.close();
                        _logMC.info("New file downloaded.");
                        // Disable plugin.
                        if(objPlugin.isEnabled() == true) objPlugin.disable();
                        File pluginFile = new File(pluginPath);
                        pluginFile.delete();
                        outFile.renameTo(pluginFile);
                        etc.getLoader().reloadPlugin(objPlugin.getName());
                    } else {
                        _logMC.info(plugin + " is up to date.");
                    }
                } catch(MalformedURLException e) {
                    e.printStackTrace();
                } catch(IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}