/*
 * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
 * Copyright (C) 2014 Vincent Breitmoser <v.breitmoser@mugenguild.com>
 * Copyright (C) 2015 Kai Jiang <jiangkai@gmail.com>
 *
 * 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 org.sufficientlysecure.keychain.ui;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.AdapterView;

import com.mikepenz.community_material_typeface_library.CommunityMaterial;
import com.mikepenz.google_material_typeface_library.GoogleMaterial;
import com.mikepenz.iconics.typeface.FontAwesome;
import com.mikepenz.materialdrawer.Drawer;
import com.mikepenz.materialdrawer.model.PrimaryDrawerItem;
import com.mikepenz.materialdrawer.model.interfaces.IDrawerItem;

import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.operations.results.OperationResult;
import org.sufficientlysecure.keychain.remote.ui.AppsListFragment;
import org.sufficientlysecure.keychain.util.FabContainer;
import org.sufficientlysecure.keychain.util.Preferences;

public class MainActivity extends AppCompatActivity implements FabContainer {

    public Drawer.Result result;

    private KeyListFragment mKeyListFragment ;
    private AppsListFragment mAppsListFragment;
    private EncryptDecryptOverviewFragment mEncryptDecryptOverviewFragment;
    private Fragment mLastUsedFragment;
    private Toolbar mToolbar;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);

        //initialize FragmentLayout with KeyListFragment at first
        Fragment mainFragment = new KeyListFragment();
        FragmentManager fm = getSupportFragmentManager();
        FragmentTransaction transaction = fm.beginTransaction();
        transaction.replace(R.id.main_fragment_container, mainFragment);
        transaction.commit();

        mToolbar = (Toolbar) findViewById(R.id.toolbar);
        mToolbar.setTitle(R.string.app_name);
        setSupportActionBar(mToolbar);

        result = new Drawer()
                .withActivity(this)
                .withHeader(R.layout.main_drawer_header)
                .withToolbar(mToolbar)
                .addDrawerItems(
                        new PrimaryDrawerItem().withName(R.string.nav_keys).withIcon(CommunityMaterial.Icon.cmd_key).withIdentifier(1).withCheckable(false),
                        new PrimaryDrawerItem().withName(R.string.nav_encrypt_decrypt).withIcon(FontAwesome.Icon.faw_lock).withIdentifier(2).withCheckable(false),
                        new PrimaryDrawerItem().withName(R.string.title_api_registered_apps).withIcon(CommunityMaterial.Icon.cmd_apps).withIdentifier(3).withCheckable(false)
                )
                .addStickyDrawerItems(
                        // display and stick on bottom of drawer
                        new PrimaryDrawerItem().withName(R.string.menu_preferences).withIcon(GoogleMaterial.Icon.gmd_settings).withIdentifier(4).withCheckable(false),
                        new PrimaryDrawerItem().withName(R.string.menu_help).withIcon(CommunityMaterial.Icon.cmd_help_circle).withIdentifier(5).withCheckable(false)
                )
                .withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id, IDrawerItem drawerItem) {
                        if (drawerItem != null) {
                            Intent intent = null;
                            switch(drawerItem.getIdentifier()) {
                                case 1:
                                    onKeysSelected();
                                    break;
                                case 2:
                                    onEnDecryptSelected();
                                    break;
                                case 3:
                                    onAppsSelected();
                                    break;
                                case 4:
                                    intent = new Intent(MainActivity.this, SettingsActivity.class);
                                    break;
                                case 5:
                                    intent = new Intent(MainActivity.this, HelpActivity.class);
                                    break;
                            }
                            if (intent != null) {
                                MainActivity.this.startActivity(intent);
                            }
                        }
                    }
                })
                .withSelectedItem(-1)
                .withSavedInstance(savedInstanceState)
                .build();

        // if this is the first time show first time activity
        Preferences prefs = Preferences.getPreferences(this);
        if (prefs.isFirstTime()) {
            Intent intent = new Intent(this, CreateKeyActivity.class);
            intent.putExtra(CreateKeyActivity.EXTRA_FIRST_TIME, true);
            startActivity(intent);
            finish();
            return;
        }

        Intent data = getIntent();
        // If we got an EXTRA_RESULT in the intent, show the notification
        if (data != null && data.hasExtra(OperationResult.EXTRA_RESULT)) {
            OperationResult result = data.getParcelableExtra(OperationResult.EXTRA_RESULT);
            result.createNotify(this).show();
        }
    }

    private void clearFragments() {
        mKeyListFragment = null;
        mAppsListFragment = null;
        mEncryptDecryptOverviewFragment = null;

        getSupportFragmentManager().popBackStack(null, FragmentManager.POP_BACK_STACK_INCLUSIVE);
    }

    private void setFragment(Fragment fragment) {
        setFragment(fragment, true);
    }

    private void setFragment(Fragment fragment, boolean addToBackStack) {
        this.mLastUsedFragment = fragment;
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
        ft.replace(R.id.main_fragment_container, fragment);
        if (addToBackStack) {
            ft.addToBackStack(null);
        }
        ft.commit();
    }

    private boolean onKeysSelected() {
        mToolbar.setTitle(R.string.app_name);
        clearFragments();

        if (mKeyListFragment == null) {
            mKeyListFragment = new KeyListFragment();
        }

        setFragment(mKeyListFragment, false);
        return true;
    }

    private boolean onEnDecryptSelected() {
        mToolbar.setTitle(R.string.nav_encrypt_decrypt);
        clearFragments();
        if (mEncryptDecryptOverviewFragment == null) {
            mEncryptDecryptOverviewFragment = new EncryptDecryptOverviewFragment();
        }

        setFragment(mEncryptDecryptOverviewFragment);
        return true;
    }

    private boolean onAppsSelected() {
        mToolbar.setTitle(R.string.nav_apps);
        clearFragments();
        if (mAppsListFragment == null) {
            mAppsListFragment = new AppsListFragment();
        }

        setFragment(mAppsListFragment);
        return true;
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        //add the values which need to be saved from the drawer to the bundle
        outState = result.saveInstanceState(outState);
        super.onSaveInstanceState(outState);
    }

    @Override
    public void onBackPressed(){
        //handle the back press :D close the drawer first and if the drawer is closed close the activity
        if (result != null && result.isDrawerOpen()) {
            result.closeDrawer();
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public void fabMoveUp(int height) {
        Object fragment = getSupportFragmentManager()
                .findFragmentById(R.id.main_fragment_container);
        if (fragment instanceof FabContainer) {
            ((FabContainer) fragment).fabMoveUp(height);
        }
    }

    @Override
    public void fabRestorePosition() {
        Object fragment = getSupportFragmentManager()
                .findFragmentById(R.id.main_fragment_container);
        if (fragment instanceof FabContainer) {
            ((FabContainer) fragment).fabRestorePosition();
        }
    }

}