/* ownCloud Android client application
 *   Copyright (C) 2011  Bartek Przybylski
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package eu.alefzero.owncloud.ui.activity;

import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.IntentFilter;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.TextView;

import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.OnNavigationListener;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.Menu;
import com.actionbarsherlock.view.MenuInflater;
import com.actionbarsherlock.view.MenuItem;
import com.actionbarsherlock.view.Window;

import eu.alefzero.owncloud.AccountUtils;
import eu.alefzero.owncloud.R;
import eu.alefzero.owncloud.authenticator.AccountAuthenticator;
import eu.alefzero.owncloud.datamodel.DataStorageManager;
import eu.alefzero.owncloud.datamodel.FileDataStorageManager;
import eu.alefzero.owncloud.datamodel.OCFile;
import eu.alefzero.owncloud.syncadapter.FileSyncService;
import eu.alefzero.owncloud.ui.fragment.FileListFragment;
import eu.alefzero.webdav.WebdavClient;

/**
 * Displays, what files the user has available in his ownCloud.
 * 
 * @author Bartek Przybylski
 * 
 */

public class FileDisplayActivity extends SherlockFragmentActivity implements
		OnNavigationListener, OnClickListener {
	private ArrayAdapter<String> mDirectories;
	private DataStorageManager mStorageManager;

	private SyncBroadcastReceiver  syncBroadcastRevceiver;
	
	private static final int DIALOG_SETUP_ACCOUNT = 0;
	private static final int DIALOG_CREATE_DIR = 1;
	
	private static final int REQUEST_ACCOUNT_SETUP = 0;
	private static final int ACTION_SELECT_FILE = 1;

	public void pushPath(String path) {
		mDirectories.insert(path, 0);
	}

	public boolean popPath() {
		mDirectories.remove(mDirectories.getItem(0));
		return !mDirectories.isEmpty();
	}

	@Override
  protected Dialog onCreateDialog(int id) {
    Dialog dialog;
    AlertDialog.Builder builder;
    switch(id){
    case DIALOG_SETUP_ACCOUNT:
      builder = new AlertDialog.Builder(this);
      builder.setTitle(R.string.main_tit_accsetup);
      builder.setMessage(R.string.main_wrn_accsetup);
      builder.setCancelable(false);
      builder.setPositiveButton(android.R.string.ok, this);
      builder.setNegativeButton(android.R.string.cancel, this);
      dialog = builder.create();
      break;
    case DIALOG_CREATE_DIR:
    {
      builder = new Builder(this);
      final EditText dirName = new EditText(getBaseContext());
      final Account a = AccountUtils.getCurrentOwnCloudAccount(this);
      builder.setView(dirName);
      builder.setTitle(R.string.uploader_info_dirname);
      int typed_color = getResources().getColor(R.color.setup_text_typed);
      dirName.setTextColor(typed_color);

      builder.setPositiveButton(android.R.string.ok, new OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
          String s = dirName.getText().toString();
          if (s.trim().length() == 0) {
            dialog.cancel();
            return;
          }

          String path = "";
          for (int i = mDirectories.getCount() - 2; i >= 0; --i) {
            path += "/" + mDirectories.getItem(i);
          }
          OCFile parent = mStorageManager.getFileByPath(path + "/");
          path += s + "/";
          Thread thread = new Thread(new DirectoryCreator(path, a));
          thread.start();
          
          OCFile new_file = new OCFile(path);
          new_file.setMimetype("DIR");
          new_file.setParentId(parent.getParentId());
          mStorageManager.saveFile(new_file);

          dialog.dismiss();
        }
      });
      builder.setNegativeButton(R.string.common_cancel,
          new OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
              dialog.cancel();
            }
          });
      dialog = builder.create();
      break;
    }
    default: 
      dialog = null;
    }
      
    return dialog;
  }

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		if(!accountsAreSetup()){
      showDialog(DIALOG_SETUP_ACCOUNT);
      return;
    }
		
		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
    setProgressBarIndeterminateVisibility(false);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
	  boolean retval = true;
		switch (item.getItemId()) {
		case R.id.settingsItem: {
			Intent i = new Intent(this, Preferences.class);
			startActivity(i);
			break;
		}
		case R.id.createDirectoryItem: {
			showDialog(DIALOG_CREATE_DIR);
			break;
		}
		case R.id.startSync: {
		  Bundle bundle = new Bundle();
      bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
      ContentResolver.requestSync(AccountUtils.getCurrentOwnCloudAccount(this),
		      "org.owncloud",
		      bundle);
      break;
		}
		case R.id.action_upload: {
		  Intent action = new Intent(Intent.ACTION_GET_CONTENT);  
		  action = action.setType("*/*").addCategory(Intent.CATEGORY_OPENABLE);  
		  startActivityForResult(Intent.createChooser(action, "Upload file from..."), ACTION_SELECT_FILE);
		  break;
		}
		  
		case android.R.id.home: {
		  Intent i = new Intent(this, AccountSelectActivity.class);
		  startActivity(i);
		  finish();
			break;
		}
			default:
			  retval = false;
		}
		return retval;
	}
	
	@Override
	public void onBackPressed(){
		if(mDirectories.getCount() == 1) {
		  finish();
			return;
		}
		popPath();
		((FileListFragment) getSupportFragmentManager().findFragmentById(R.id.fileList))
				.onNavigateUp();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		MenuInflater inflater = getSherlock().getMenuInflater();
		inflater.inflate(R.menu.menu, menu);
		return true;
	}

	 @Override
	  protected void onRestoreInstanceState(Bundle savedInstanceState) {
	    super.onRestoreInstanceState(savedInstanceState);
	    // Check, if there are ownCloud accounts
	    if(!accountsAreSetup()){
	      showDialog(DIALOG_SETUP_ACCOUNT);
	    }
	  }

	    
	 @Override
	protected void onResume() {
	  super.onResume();
	  if(!accountsAreSetup()){
      showDialog(DIALOG_SETUP_ACCOUNT);
      return;
    }
	  
	   IntentFilter f = new IntentFilter(FileSyncService.SYNC_MESSAGE);
	   syncBroadcastRevceiver = new  SyncBroadcastReceiver();
	   registerReceiver(syncBroadcastRevceiver, f);
	   if (getSupportFragmentManager().findFragmentById(R.id.fileList) == null)
	     setContentView(R.layout.files);
	   
	   mDirectories = new CustomArrayAdapter<String>(this,
	        R.layout.sherlock_spinner_dropdown_item);
	    mDirectories.add("/");
	    
	    mStorageManager = new FileDataStorageManager(AccountUtils.getCurrentOwnCloudAccount(this), getContentResolver());
	    ActionBar action_bar = getSupportActionBar();
	    action_bar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
	    action_bar.setDisplayShowTitleEnabled(false);
	    action_bar.setListNavigationCallbacks(mDirectories, this);
	    action_bar.setDisplayHomeAsUpEnabled(true);
	}
	    
	 public void onActivityResult(int requestCode, int resultCode, Intent data) {
     if (resultCode == RESULT_OK) {
         if (requestCode == ACTION_SELECT_FILE) {
             Uri selectedImageUri = data.getData();

             String filemanagerstring = selectedImageUri.getPath();

             String selectedImagePath = getPath(selectedImageUri);

             //DEBUG PURPOSE - you can delete this if you want
             if(selectedImagePath!=null)
                 System.out.println(selectedImagePath);
             else System.out.println("selectedImagePath is null");
             if(filemanagerstring!=null)
                 System.out.println(filemanagerstring);
             else System.out.println("filemanagerstring is null");

             //NOW WE HAVE OUR WANTED STRING
             if(selectedImagePath!=null)
                 System.out.println("selectedImagePath is the right one for you!");
             else
                 System.out.println("filemanagerstring is the right one for you!");
         }
     }
	 }
	 
     public String getPath(Uri uri) {
       String[] projection = { MediaStore.Images.Media.DATA };
       Cursor cursor = managedQuery(uri, projection, null, null, null);
       if(cursor!=null)
       {
           //HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
           //THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
           int column_index = cursor
           .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
           cursor.moveToFirst();
           return cursor.getString(column_index);
       }
       else return null;
   }
     
	 @Override
	protected void onPause() {
	  super.onPause();
	  if (syncBroadcastRevceiver != null) {
	    unregisterReceiver(syncBroadcastRevceiver);
	    syncBroadcastRevceiver = null;
	  }
	  
	}
	 
	@Override
	public boolean onNavigationItemSelected(int itemPosition, long itemId) {
		int i = itemPosition;
		while (i-- != 0) {
			onBackPressed();
		}
		return true;
	}

	private class DirectoryCreator implements Runnable {
		private String mTargetPath;
		private Account mAccount;
		private AccountManager mAm;

		public DirectoryCreator(String targetPath, Account account) {
			mTargetPath = targetPath;
			mAccount = account;
			mAm = (AccountManager) getSystemService(ACCOUNT_SERVICE);
		}

		@Override
		public void run() {
			WebdavClient wdc = new WebdavClient(Uri.parse(mAm.getUserData(
					mAccount, AccountAuthenticator.KEY_OC_URL)));

			String username = mAccount.name.substring(0,
					mAccount.name.lastIndexOf('@'));
			String password = mAm.getPassword(mAccount);

			wdc.setCredentials(username, password);
			wdc.allowUnsignedCertificates();
			wdc.createDirectory(mTargetPath);
		}

	}

	// Custom array adapter to override text colors
	private class CustomArrayAdapter<T> extends ArrayAdapter<T> {
		
		public CustomArrayAdapter(FileDisplayActivity ctx,
				int view) {
			super(ctx, view);
		}

		public View getView(int position, View convertView,
                ViewGroup parent) {
            View v = super.getView(position, convertView, parent);

            ((TextView) v).setTextColor(
                    getResources()
                    .getColorStateList(android.R.color.white));
            return v;
        }
		
		public View getDropDownView(int position, View convertView,
                ViewGroup parent) {
            View v = super.getDropDownView(position, convertView,
                    parent);

            ((TextView) v).setTextColor(getResources().getColorStateList(
                            android.R.color.white));

            return v;
        }


		
	}
	
	 public void onClick(DialogInterface dialog, int which) {
	    // In any case - we won't need it anymore
	    dialog.dismiss();
	    switch(which){
	    case DialogInterface.BUTTON_POSITIVE:
	      Intent intent = new Intent("android.settings.ADD_ACCOUNT_SETTINGS");
	      intent.putExtra("authorities",
	          new String[] { AccountAuthenticator.AUTH_TOKEN_TYPE });
	      startActivity(intent);
	      break;
	    case DialogInterface.BUTTON_NEGATIVE:
	      finish();
	    }
	    
	  }
	
	/**
   * Checks, whether or not there are any ownCloud accounts 
   * setup. 
   *  
   * @return true, if there is at least one account.
   */
  private boolean accountsAreSetup() {
    AccountManager accMan = AccountManager.get(this);
    Account[] accounts = accMan
        .getAccountsByType(AccountAuthenticator.ACCOUNT_TYPE); 
    return accounts.length > 0;
  }
  
  private class SyncBroadcastReceiver extends BroadcastReceiver {
	  /**
	   * {@link BroadcastReceiver} to enable syncing feedback in UI
	   */
    @Override
    public void onReceive(Context context, Intent intent) {
      boolean inProgress = intent.getBooleanExtra(FileSyncService.IN_PROGRESS, false);
      String account_name = intent.getStringExtra(FileSyncService.ACCOUNT_NAME);
      Log.d("FileDisplay", "sync of account " + account_name + " is in_progress: " + inProgress);
      setProgressBarIndeterminateVisibility(inProgress);
      if (!inProgress) {
        FileListFragment fileListFramgent = (FileListFragment) getSupportFragmentManager().findFragmentById(R.id.fileList);
        if (fileListFramgent != null)
          fileListFramgent.populateFileList();
      }
    }
    
  }
  
}