/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#filter substitution
package @ANDROID_PACKAGE_NAME@;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.view.Window;
import android.widget.SimpleAdapter;
import android.widget.Toast;

import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
import org.mozilla.gecko.GeckoApp;
import org.mozilla.gecko.GeckoProfile;
import org.mozilla.gecko.R;
import org.mozilla.gecko.WebAppAllocator;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;

public class LauncherShortcuts extends Activity {

    private ArrayList <HashMap<String, String>> mWebappsList;
    private File mWebappsFolder;

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

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.launch_app_list);

        final Intent intent = getIntent();
        final String action = intent.getAction();

        if (Intent.ACTION_CREATE_SHORTCUT.equals(action)) {
            // Doing it as a background task, as it involves file access
            new FetchWebApps().execute();
        }
    }

    public void onListItemClick(int id) {
        HashMap<String, String> map = mWebappsList.get(id);
        
        String uri = map.get("uri").toString();
        String title = map.get("title").toString();
        String appKey = map.get("appKey").toString();
        String favicon = map.get("favicon").toString();
        
        File manifestFile = new File(mWebappsFolder, appKey + "/manifest.json");
        
        // Parse the contents into a string
        String manifestJson = new String();
        try {
            BufferedReader in = new BufferedReader(new FileReader(manifestFile));
            String line = new String();
            
            while ((line = in.readLine()) != null) {
                manifestJson += line;
            }
        } catch (IOException e) { }
        
        try {
            JSONObject manifest = (JSONObject) new JSONTokener(manifestJson).nextValue();
            uri += manifest.getString("launch_path");
        } catch (JSONException e) { }

        WebAppAllocator allocator = WebAppAllocator.getInstance(this);
        int index = allocator.findAndAllocateIndex(uri, title, favicon);
        Intent shortcutintent = new Intent(GeckoApp.ACTION_WEBAPP_PREFIX + index);
        shortcutintent.setClassName(this, GeckoApp.mAppContext.getPackageName() + ".WebApps$WebApp" + index);
        shortcutintent.putExtra("args", "--webapp=" + uri);

        Intent intent = new Intent();
        intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, title);
        intent.putExtra(Intent.EXTRA_SHORTCUT_INTENT, shortcutintent);

        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        int size;
        switch (dm.densityDpi) {
            case DisplayMetrics.DENSITY_MEDIUM:
                size = 48;
                break;
            case DisplayMetrics.DENSITY_HIGH:
                size = 72;
                break;
            default:
                size = 72;
        }

        Bitmap bitmap = BitmapFactory.decodeFile(favicon);
        if (bitmap != null) {
            Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap, size, size, true);
            intent.putExtra(Intent.EXTRA_SHORTCUT_ICON, scaledBitmap);
        }

        // Now, return the result to the launcher
        setResult(RESULT_OK, intent);
        finish();
    }
    
    private class FetchWebApps extends AsyncTask<Void, Void, Void> {
        
        @Override
        protected Void doInBackground(Void... unused) {
            mWebappsList = null;
            
            Context context = getApplicationContext();
            GeckoProfile profile = GeckoProfile.get(context);
            String webappsJson = null;
            try {
                webappsJson = profile.readFile("webapps" + File.separatorChar + "webapps.json");
            } catch (IOException ioe) {
                // unable to load the file, leave webappsJson as null
            }

            if (TextUtils.isEmpty(webappsJson))
                return null;
            
            mWebappsList = new ArrayList<HashMap<String, String>>();

            try {
                JSONObject webApps = (JSONObject) new JSONTokener(webappsJson).nextValue();

                @SuppressWarnings("rawtypes") Iterator appKeys = webApps.keys();
                HashMap<String, String> map;

                while (appKeys.hasNext()) {
                    String appKey = (String)appKeys.next();
                    JSONObject app = webApps.getJSONObject(appKey);
                    
                    map = new HashMap<String, String>();
                    map.put("appKey", appKey);
                    map.put("favicon", mWebappsFolder.getPath() + "/" + appKey + "/icon.png");
                    map.put("title", app.getString("title"));
                    map.put("uri", app.getString("appURI"));
                    
                    mWebappsList.add(map);
                }
                
            } catch (JSONException e) {}
            
            return null;
        }
        
        @Override
        protected void onPostExecute(Void unused) {
            if (mWebappsList != null) {
                AlertDialog.Builder builder;
                
                if (android.os.Build.VERSION.SDK_INT >= 11) {
                    builder = new AlertDialog.Builder(LauncherShortcuts.this, AlertDialog.THEME_HOLO_LIGHT);
                } else {
                    builder = new AlertDialog.Builder(LauncherShortcuts.this);
                }
                
                builder.setTitle(R.string.launcher_shortcuts_title);
                builder.setAdapter(new SimpleAdapter(
                    LauncherShortcuts.this,
                    mWebappsList,
                    R.layout.launch_app_listitem,
                    new String[] { "favicon", "title" },
                    new int[] { R.id.favicon, R.id.title }
                ), new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        dialog.dismiss();
                        onListItemClick(id);
                        finish();
                    }
                });
                
                builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
                    public void onCancel(DialogInterface dialog) {
                        dialog.dismiss();
                        finish();
                    }
                });
                
                builder.create().show();
            } else {
                Toast.makeText(LauncherShortcuts.this, R.string.launcher_shortcuts_empty, Toast.LENGTH_LONG).show();
                finish();
            }
        }
    }
}