/*
 * This is the source code of Telegram for Android v. 1.3.x.
 * It is licensed under GNU GPL v. 2 or later.
 * You should have received a copy of the license in this archive (see LICENSE).
 *
 * Copyright Nikolai Kudashov, 2013-2014.
 */

package org.telegram.ui;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

import org.telegram.messenger.FileLog;
import org.telegram.messenger.LocaleController;
import org.telegram.messenger.R;
import org.telegram.messenger.Utilities;
import org.telegram.ui.Adapters.BaseFragmentAdapter;
import org.telegram.ui.Views.ActionBar.ActionBarLayer;
import org.telegram.ui.Views.ActionBar.ActionBarMenu;
import org.telegram.ui.Views.ActionBar.ActionBarMenuItem;
import org.telegram.ui.Views.ActionBar.BaseFragment;

import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;

public class LanguageSelectActivity extends BaseFragment {
    private BaseFragmentAdapter listAdapter;
    private ListView listView;
    private boolean searchWas;
    private boolean searching;
    private BaseFragmentAdapter searchListViewAdapter;
    private TextView emptyTextView;

    private Timer searchTimer;
    public ArrayList<LocaleController.LocaleInfo> searchResult;

    @Override
    public View createView(LayoutInflater inflater, ViewGroup container) {
        if (fragmentView == null) {
            actionBarLayer.setDisplayHomeAsUpEnabled(true, R.drawable.ic_ab_back);
            actionBarLayer.setBackOverlay(R.layout.updating_state_layout);
            actionBarLayer.setTitle(LocaleController.getString("Language", R.string.Language));

            actionBarLayer.setActionBarMenuOnItemClick(new ActionBarLayer.ActionBarMenuOnItemClick() {
                @Override
                public void onItemClick(int id) {
                    if (id == -1) {
                        finishFragment();
                    }
                }
            });

            ActionBarMenu menu = actionBarLayer.createMenu();
            menu.addItem(0, R.drawable.ic_ab_search).setIsSearchField(true).setActionBarMenuItemSearchListener(new ActionBarMenuItem.ActionBarMenuItemSearchListener() {
                @Override
                public void onSearchExpand() {
                    searching = true;
                }

                @Override
                public void onSearchCollapse() {
                    search(null);
                    searching = false;
                    searchWas = false;
                    if (listView != null) {
                        emptyTextView.setVisibility(View.GONE);
                        listView.setAdapter(listAdapter);
                    }
                }

                @Override
                public void onTextChanged(EditText editText) {
                    String text = editText.getText().toString();
                    search(text);
                    if (text.length() != 0) {
                        searchWas = true;
                        if (listView != null) {
                            listView.setPadding(Utilities.dp(16), listView.getPaddingTop(), Utilities.dp(16), listView.getPaddingBottom());
                            listView.setAdapter(searchListViewAdapter);
                            if(android.os.Build.VERSION.SDK_INT >= 11) {
                                listView.setFastScrollAlwaysVisible(false);
                            }
                            listView.setFastScrollEnabled(false);
                            listView.setVerticalScrollBarEnabled(true);
                        }
                        if (emptyTextView != null) {
                            emptyTextView.setText(LocaleController.getString("NoResult", R.string.NoResult));
                        }
                    }
                }
            });

            fragmentView = inflater.inflate(R.layout.language_select_layout, container, false);
            listAdapter = new ListAdapter(getParentActivity());
            listView = (ListView)fragmentView.findViewById(R.id.listView);
            listView.setAdapter(listAdapter);
            emptyTextView = (TextView)fragmentView.findViewById(R.id.searchEmptyView);
            listView.setEmptyView(emptyTextView);
            searchListViewAdapter = new SearchAdapter(getParentActivity());

            listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                    LocaleController.LocaleInfo localeInfo = null;
                    if (searching && searchWas) {
                        if (i >= 0 && i < searchResult.size()) {
                            localeInfo = searchResult.get(i);
                        }
                    } else {
                        if (i >= 0 && i < LocaleController.getInstance().sortedLanguages.size()) {
                            localeInfo = LocaleController.getInstance().sortedLanguages.get(i);
                        }
                    }
                    if (localeInfo != null) {
                        LocaleController.getInstance().applyLanguage(localeInfo, true);
                        getParentActivity().rebuildAllFragmentViews();
                    }
                    finishFragment();
                }
            });

            listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
                @Override
                public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
                    LocaleController.LocaleInfo localeInfo = null;
                    if (searching && searchWas) {
                        if (i >= 0 && i < searchResult.size()) {
                            localeInfo = searchResult.get(i);
                        }
                    } else {
                        if (i >= 0 && i < LocaleController.getInstance().sortedLanguages.size()) {
                            localeInfo = LocaleController.getInstance().sortedLanguages.get(i);
                        }
                    }
                    if (localeInfo == null || localeInfo.pathToFile == null || getParentActivity() == null) {
                        return false;
                    }
                    final LocaleController.LocaleInfo finalLocaleInfo = localeInfo;
                    AlertDialog.Builder builder = new AlertDialog.Builder(getParentActivity());
                    builder.setMessage(LocaleController.getString("DeleteLocalization", R.string.DeleteLocalization));
                    builder.setTitle(LocaleController.getString("AppName", R.string.AppName));
                    builder.setPositiveButton(LocaleController.getString("Delete", R.string.Delete), new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            if (LocaleController.getInstance().deleteLanguage(finalLocaleInfo)) {
                                if (searchResult != null) {
                                    searchResult.remove(finalLocaleInfo);
                                }
                                if (listAdapter != null) {
                                    listAdapter.notifyDataSetChanged();
                                }
                                if (searchListViewAdapter != null) {
                                    searchListViewAdapter.notifyDataSetChanged();
                                }
                            }
                        }
                    });
                    builder.setNegativeButton(LocaleController.getString("Cancel", R.string.Cancel), null);
                    showAlertDialog(builder);
                    return true;
                }
            });

            listView.setOnScrollListener(new AbsListView.OnScrollListener() {
                @Override
                public void onScrollStateChanged(AbsListView absListView, int i) {
                    if (i == SCROLL_STATE_TOUCH_SCROLL && searching && searchWas) {
                        Utilities.hideKeyboard(getParentActivity().getCurrentFocus());
                    }
                }

                @Override
                public void onScroll(AbsListView absListView, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
                }
            });

            searching = false;
            searchWas = false;
        } else {
            ViewGroup parent = (ViewGroup)fragmentView.getParent();
            if (parent != null) {
                parent.removeView(fragmentView);
            }
        }
        return fragmentView;
    }

    @Override
    public void onResume() {
        super.onResume();
        if (listAdapter != null) {
            listAdapter.notifyDataSetChanged();
        }
    }

    public void search(final String query) {
        if (query == null) {
            searchResult = null;
        } else {
            try {
                if (searchTimer != null) {
                    searchTimer.cancel();
                }
            } catch (Exception e) {
                FileLog.e("tmessages", e);
            }
            searchTimer = new Timer();
            searchTimer.schedule(new TimerTask() {
                @Override
                public void run() {
                    try {
                        searchTimer.cancel();
                        searchTimer = null;
                    } catch (Exception e) {
                        FileLog.e("tmessages", e);
                    }
                    processSearch(query);
                }
            }, 100, 300);
        }
    }

    private void processSearch(final String query) {
        Utilities.searchQueue.postRunnable(new Runnable() {
            @Override
            public void run() {

                String q = query.trim().toLowerCase();
                if (q.length() == 0) {
                    updateSearchResults(new ArrayList<LocaleController.LocaleInfo>());
                    return;
                }
                long time = System.currentTimeMillis();
                ArrayList<LocaleController.LocaleInfo> resultArray = new ArrayList<LocaleController.LocaleInfo>();

                for (LocaleController.LocaleInfo c : LocaleController.getInstance().sortedLanguages) {
                    if (c.name.toLowerCase().startsWith(query) || c.nameEnglish.toLowerCase().startsWith(query)) {
                        resultArray.add(c);
                    }
                }

                updateSearchResults(resultArray);
            }
        });
    }

    private void updateSearchResults(final ArrayList<LocaleController.LocaleInfo> arrCounties) {
        Utilities.RunOnUIThread(new Runnable() {
            @Override
            public void run() {
                searchResult = arrCounties;
                searchListViewAdapter.notifyDataSetChanged();
            }
        });
    }

    private class SearchAdapter extends BaseFragmentAdapter {
        private Context mContext;

        public SearchAdapter(Context context) {
            mContext = context;
        }

        @Override
        public boolean areAllItemsEnabled() {
            return true;
        }

        @Override
        public boolean isEnabled(int i) {
            return true;
        }

        @Override
        public int getCount() {
            if (searchResult == null) {
                return 0;
            }
            return searchResult.size();
        }

        @Override
        public Object getItem(int i) {
            return null;
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public boolean hasStableIds() {
            return false;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            if (view == null) {
                LayoutInflater li = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                view = li.inflate(R.layout.settings_row_button_layout, viewGroup, false);
            }
            TextView textView = (TextView)view.findViewById(R.id.settings_row_text);
            View divider = view.findViewById(R.id.settings_row_divider);

            LocaleController.LocaleInfo c = searchResult.get(i);
            textView.setText(c.name);
            if (i == searchResult.size() - 1) {
                divider.setVisibility(View.GONE);
            } else {
                divider.setVisibility(View.VISIBLE);
            }

            return view;
        }

        @Override
        public int getItemViewType(int i) {
            return 0;
        }

        @Override
        public int getViewTypeCount() {
            return 1;
        }

        @Override
        public boolean isEmpty() {
            return searchResult == null || searchResult.size() == 0;
        }
    }

    private class ListAdapter extends BaseFragmentAdapter {
        private Context mContext;

        public ListAdapter(Context context) {
            mContext = context;
        }

        @Override
        public boolean areAllItemsEnabled() {
            return true;
        }

        @Override
        public boolean isEnabled(int i) {
            return true;
        }

        @Override
        public int getCount() {
            if (LocaleController.getInstance().sortedLanguages == null) {
                return 0;
            }
            return LocaleController.getInstance().sortedLanguages.size();
        }

        @Override
        public Object getItem(int i) {
            return null;
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public boolean hasStableIds() {
            return false;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            if (view == null) {
                LayoutInflater li = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                view = li.inflate(R.layout.settings_row_button_layout, viewGroup, false);
            }
            TextView textView = (TextView)view.findViewById(R.id.settings_row_text);
            View divider = view.findViewById(R.id.settings_row_divider);

            LocaleController.LocaleInfo localeInfo = LocaleController.getInstance().sortedLanguages.get(i);
            textView.setText(localeInfo.name);
            if (i == LocaleController.getInstance().sortedLanguages.size() - 1) {
                divider.setVisibility(View.GONE);
            } else {
                divider.setVisibility(View.VISIBLE);
            }

            return view;
        }

        @Override
        public int getItemViewType(int i) {
            return 0;
        }

        @Override
        public int getViewTypeCount() {
            return 1;
        }

        @Override
        public boolean isEmpty() {
            return LocaleController.getInstance().sortedLanguages == null || LocaleController.getInstance().sortedLanguages.size() == 0;
        }
    }
}