CategoryFragment.java

package com.mozu.mozuandroidinstoreassistant.app.category;

import android.app.Activity;
import android.app.Fragment;
import android.app.SearchManager;
import android.content.Context;
import android.database.MatrixCursor;
import android.os.Bundle;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.TextView;
import android.widget.Toast;

import com.mozu.api.contracts.productruntime.Category;
import com.mozu.mozuandroidinstoreassistant.app.BuildConfig;
import com.mozu.mozuandroidinstoreassistant.app.MainActivity;
import com.mozu.mozuandroidinstoreassistant.app.R;
import com.mozu.mozuandroidinstoreassistant.app.adapters.SearchSuggestionsCursorAdapter;
import com.mozu.mozuandroidinstoreassistant.app.category.adapters.CategoryAdapter;
import com.mozu.mozuandroidinstoreassistant.app.category.loaders.CategoryFetcher;
import com.mozu.mozuandroidinstoreassistant.app.models.RecentSearch;
import com.mozu.mozuandroidinstoreassistant.app.models.UserPreferences;
import com.mozu.mozuandroidinstoreassistant.app.models.authentication.UserAuthenticationStateMachine;
import com.mozu.mozuandroidinstoreassistant.app.models.authentication.UserAuthenticationStateMachineProducer;
import com.mozu.mozuandroidinstoreassistant.app.tasks.CategoryImageUpdateListener;
import com.mozu.mozuandroidinstoreassistant.app.tasks.CategoryImageUpdateTask;

import java.util.ArrayList;
import java.util.List;

import butterknife.ButterKnife;
import butterknife.InjectView;
import rx.Observable;
import rx.android.observables.AndroidObservable;
import rx.functions.Func1;
import rx.schedulers.Schedulers;

public class CategoryFragment extends Fragment implements AdapterView.OnItemClickListener, SearchView.OnQueryTextListener, SearchView.OnSuggestionListener, SwipeRefreshLayout.OnRefreshListener {

    public static final int MAX_NUMBER_OF_SEARCHES = 5;
    private static final int CATEGORY_IMAGELOADER_MENU_ID = 100;
    private static final String CURRENT_CATEGORY = "currentCategory" ;

    @InjectView(R.id.category_grid) GridView mGridOfCategories;
    @InjectView(R.id.category_list) ListView mListOfCategories;

    private UserAuthenticationStateMachine mUserState;
    private CategoryAdapter mCategoryAdapter;
    private Category mCategory;
    private CategoryFragmentListener mListener = sCategoryListener;
    private boolean mIsGridVisible = true;

    private MenuItem mToggleGridItem;

    private SearchView mSearchView;

    private MenuItem mSearchMenuItem;
    private rx.Observable<List<Category>> mCategoryObservable;

    @InjectView(R.id.empty_list) TextView mEmptyListMessageView;
    @InjectView(R.id.category_container) SwipeRefreshLayout mCategoryPullToRefresh;

    public static CategoryFragment getInstance(Category category){
        CategoryFragment fragment = new CategoryFragment();
        Bundle bundle = new Bundle();
        bundle.putSerializable(CURRENT_CATEGORY, category);
        fragment.setArguments(bundle);
        return fragment;
    }


    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        mListener = (CategoryFragmentListener) activity;
    }

    @Override
    public void onDetach() {
        mListener = sCategoryListener;
        super.onDetach();
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putSerializable(CURRENT_CATEGORY,mCategory);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Bundle b = getArguments();
        mCategory = (Category) b.getSerializable(CURRENT_CATEGORY);
        mUserState = UserAuthenticationStateMachineProducer.getInstance(getActivity());
        CategoryFetcher categoryFetcher = new CategoryFetcher();
        mCategoryObservable = AndroidObservable.bindFragment(this, categoryFetcher.getCategoryInformation(mUserState.getTenantId(),mUserState.getSiteId()));
        setRetainInstance(true);
        setHasOptionsMenu(true);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        if (savedInstanceState != null) {
            mCategory = (Category) savedInstanceState.getSerializable(CURRENT_CATEGORY);
        }
        if (mCategory == null || mCategory.getChildrenCategories().size() < 1) {
            reloadData();
        } else {
            updateListGridsToCategory(mCategory.getChildrenCategories());
        }
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View fragmentView = inflater.inflate(R.layout.fragment_category_product_grid, container, false);
        ButterKnife.inject(this, fragmentView);
        mGridOfCategories.setOnItemClickListener(this);
        mListOfCategories.setOnItemClickListener(this);
        mListOfCategories.setDivider(null);
        mEmptyListMessageView.setVisibility(View.GONE);
        mCategoryPullToRefresh.setOnRefreshListener(this);
        mCategoryPullToRefresh.setEnabled(false);
        mCategoryPullToRefresh.setColorScheme(R.color.first_color_swipe_refresh,
                R.color.second_color_swipe_refresh,
                R.color.third_color_swipe_refresh,
                R.color.fourth_color_swipe_refresh);

        return fragmentView;
    }

    public void reloadData(){
        mCategoryPullToRefresh.setRefreshing(true);
        mCategoryObservable.subscribeOn(Schedulers.io())
                .flatMap(new Func1<List<Category>, Observable<Category>>() {
                    @Override
                    public Observable<Category> call(List<Category> categories) {
                        return Observable.from(categories);
                    }
                }).filter(new Func1<Category, Boolean>() {
                    @Override
                     public Boolean call(Category category) {
                        if (mCategory == null) {
                            return true;
                        }
                        return mCategory.getCategoryId().equals(category.getCategoryId());
                     }
                })
                .subscribe(new CategorySubscriber());
    }

    @Override
    public void onHiddenChanged(boolean hidden) {
        super.onHiddenChanged(hidden);
        if (!hidden) {
            ((MainActivity)getActivity()).setProductSelected();
        }
    }
    @Override
    public void onRefresh() {
        reloadData();
    }

    private class CategorySubscriber implements rx.Observer<Category> {

        List<Category> categoryList = new ArrayList<Category>();

        @Override
        public void onCompleted() {
            if (mCategoryPullToRefresh.isRefreshing()) {
                mCategoryPullToRefresh.setRefreshing(false);
            }
            updateListGridsToCategory(categoryList);
        }

        @Override
        public void onError(Throwable e) {
            mCategoryPullToRefresh.setRefreshing(false);
            mGridOfCategories.setVisibility(View.GONE);
            mListOfCategories.setVisibility(View.GONE);
            mEmptyListMessageView.setVisibility(View.VISIBLE);
        }

        @Override
        public void onNext(Category category) {
            categoryList.add(category);
        }
    }


    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        UserPreferences prefs = mUserState.getCurrentUsersPreferences();

        inflater.inflate(R.menu.product, menu);

        mToggleGridItem = menu.findItem(R.id.toggle_view);

        mIsGridVisible = prefs.getShowAsGrids();

        if (mIsGridVisible) {
            mToggleGridItem.setIcon(R.drawable.actionbar_icon_list_button);
            mToggleGridItem.setTitle(getString(R.string.view_as_list_menu_item_text));
        } else {
            mToggleGridItem.setIcon(R.drawable.actionbar_icon_grid_button);
            mToggleGridItem.setTitle(getString(R.string.view_as_grid_menu_item_text));
        }

        if (BuildConfig.DEBUG) {
          //  menu.add(0, CATEGORY_IMAGELOADER_MENU_ID, Menu.NONE, "Load Category Images");
        }

        // Get the SearchView and set the searchable configuration
        SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE);
        mSearchMenuItem = menu.findItem(R.id.action_search);
        mSearchView = (SearchView) mSearchMenuItem.getActionView();
        mSearchView.setBackgroundResource(R.drawable.mozu_edit_text_holo_light);
        mSearchView.setQueryHint(getString(R.string.product_search_hint));
        mSearchView.setMaxWidth(1500);

        mSearchView.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName()));
        mSearchView.setOnQueryTextListener(this);
    }

    private void showSuggestions() {
        UserPreferences prefs = mUserState.getCurrentUsersPreferences();

        List<RecentSearch> recentProductSearches = prefs.getRecentProductSearches();

        // Load data from list to cursor
        String[] columns = new String[] { "_id", "text" };
        Object[] temp = new Object[] { 0, "default" };

        MatrixCursor cursor = new MatrixCursor(columns);

        if (recentProductSearches == null || recentProductSearches.size() < 1) {
            return;
        }

        for(int i = 0; i < recentProductSearches.size(); i++) {

            temp[0] = i;
            temp[1] = recentProductSearches.get(i);

            cursor.addRow(temp);

        }

        mSearchView.setSuggestionsAdapter(new SearchSuggestionsCursorAdapter(getActivity(), cursor, recentProductSearches));

        mSearchView.setOnSuggestionListener(this);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        UserPreferences prefs = mUserState.getCurrentUsersPreferences();

        if (item.getItemId() == R.id.toggle_view) {
            if (mCategoryAdapter == null) {
                return false;
            }

            if (!mIsGridVisible) {
                mIsGridVisible = true;
                mListOfCategories.setVisibility(View.GONE);
                mGridOfCategories.setVisibility(View.VISIBLE);
                mCategoryAdapter.setIsGrid(true);
                mCategoryAdapter.notifyDataSetChanged();
                prefs.setShowAsGrids(true);
                mUserState.updateUserPreferences();

                mToggleGridItem.setIcon(R.drawable.actionbar_icon_list_button);
                mToggleGridItem.setTitle(getString(R.string.view_as_list_menu_item_text));

                return true;

            } else {
                mIsGridVisible = false;
                mListOfCategories.setVisibility(View.VISIBLE);
                mGridOfCategories.setVisibility(View.GONE);
                mCategoryAdapter.setIsGrid(false);
                mCategoryAdapter.notifyDataSetChanged();
                prefs.setShowAsGrids(false);
                mUserState.updateUserPreferences();

                mToggleGridItem.setIcon(R.drawable.actionbar_icon_grid_button);
                mToggleGridItem.setTitle(getString(R.string.view_as_grid_menu_item_text));

                return true;
            }
        } else if (item.getItemId() == R.id.action_search) {
            showSuggestions();
        } else if(item.getItemId() == CATEGORY_IMAGELOADER_MENU_ID){
            List<Category> categories = new ArrayList<Category>();
            if (mCategoryAdapter != null) {
                for (int i = 0; i < mCategoryAdapter.getCount(); i++) {
                    categories.add(mCategoryAdapter.getItem(i));
                }
            }
            loadCategoryImages(categories);
        }else if(item.getItemId() == R.id.refresh_product){
            reloadData();
        }

        return super.onOptionsItemSelected(item);
    }



    private void loadCategoryImages(List<Category> mCategories){
       for(Category category:mCategories) {
            if (category.getContent().getCategoryImages() == null || category.getContent().getCategoryImages().size() <= 0) {
                CategoryImageUpdateTask task = new CategoryImageUpdateTask(mCategoryImageUpdateListener,mUserState.getTenantId(), mUserState.getSiteId(),5);
                task.execute();
            }
        }
    }

    private CategoryImageUpdateListener mCategoryImageUpdateListener = new CategoryImageUpdateListener() {
        @Override
        public void onImageUpdateSucces(String categoryName, String categoryId) {
            Toast.makeText(getActivity(),"Done updating image for "+categoryName,Toast.LENGTH_SHORT).show();
        }
        @Override
        public void onImageUpdateFailure(String message) {
            Toast.makeText(getActivity(),"Failed to update image for ",Toast.LENGTH_SHORT).show();
        }
    };

    private void updateListGridsToCategory(List<Category> categoryList) {
        UserPreferences prefs = mUserState.getCurrentUsersPreferences();

        if (categoryList == null || categoryList.size() < 1) {
            mGridOfCategories.setVisibility(View.GONE);
            mListOfCategories.setVisibility(View.GONE);
            mEmptyListMessageView.setVisibility(View.VISIBLE);
            return;
        } else {
            mEmptyListMessageView.setVisibility(View.GONE);
        }
        if (mCategoryAdapter == null) {
            mCategoryAdapter = new CategoryAdapter(getActivity(), mUserState.getTenantId(), mUserState.getSiteId(), mUserState.getSiteDomain());
            mCategoryAdapter.addAll(categoryList);
        }

        mGridOfCategories.setAdapter(mCategoryAdapter);
        mListOfCategories.setAdapter(mCategoryAdapter);

        if (prefs.getShowAsGrids()) {
            mGridOfCategories.setVisibility(View.VISIBLE);
            mListOfCategories.setVisibility(View.GONE);
            mCategoryAdapter.setIsGrid(true);
            mCategoryAdapter.notifyDataSetChanged();
        } else {
            mGridOfCategories.setVisibility(View.GONE);
            mListOfCategories.setVisibility(View.VISIBLE);
            mCategoryAdapter.setIsGrid(false);
            mCategoryAdapter.notifyDataSetChanged();
        }


    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        //traverse categories adapter, if leaf then, tell activity this is a leaf and to show and retrieve products
        Category categoryAtPosition = mCategoryAdapter.getItem(position);
        mListener.onCategoryChosen(categoryAtPosition);
    }

    private static CategoryFragmentListener sCategoryListener = new CategoryFragmentListener() {

        @Override
        public void onCategoryChosen(Category category) {
            Log.e("TAG", "not implemented");
        }

        @Override
        public void onSearchPerformedFromCategory(int currentCategory, String query) {
            Log.e("TAG", "not implemented");
        }

    };

    @Override
    public boolean onQueryTextSubmit(String query) {
        mSearchMenuItem.collapseActionView();
        int categoryId = -1;
        if (mCategory != null) {
            categoryId = mCategory.getCategoryId();
        }
        mListener.onSearchPerformedFromCategory(categoryId, query);
        //save search to list
        UserPreferences prefs = mUserState.getCurrentUsersPreferences();

        List<RecentSearch> recentProductSearches = prefs.getRecentProductSearches();

        if (recentProductSearches == null) {
            recentProductSearches = new ArrayList<RecentSearch>();
        }
        //if search already exists then dont add it again
        for (int i = 0; i < recentProductSearches.size(); i++) {
            if (recentProductSearches.get(i).getSearchTerm().equalsIgnoreCase(query)) {
                recentProductSearches.remove(i);
                break;
            }
        }

        RecentSearch search = new RecentSearch();
        search.setSearchTerm(query);

        recentProductSearches.add(0, search);

        if (recentProductSearches.size() > MAX_NUMBER_OF_SEARCHES) {
            recentProductSearches.remove(recentProductSearches.size() - 1);
        }

        prefs.setRecentProductSearchs(recentProductSearches);

        mUserState.updateUserPreferences();

        return true;
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        return false;
    }

    @Override
    public boolean onSuggestionSelect(int position) {
        return false;
    }

    @Override
    public boolean onSuggestionClick(int position) {
        UserPreferences prefs = mUserState.getCurrentUsersPreferences();
        List<RecentSearch> recentProductSearches = prefs.getRecentProductSearches();
        onQueryTextSubmit(recentProductSearches.get(position).getSearchTerm());
        return true;
    }
}