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package org.solovyev.android.samples.db;

import android.app.ListActivity;
import android.content.Context;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.solovyev.android.async.CommonAsyncTask;
import org.solovyev.android.list.ListItem;
import org.solovyev.android.list.ListItemArrayAdapter;
import org.solovyev.android.samples.R;
import org.solovyev.android.samples.SamplesApplication;
import org.solovyev.common.text.StringUtils;

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

/**
 * User: serso
 * Date: 8/10/12
 * Time: 4:28 PM
 */
public class SamplesDbActivity extends ListActivity {

    /*
    **********************************************************************
    *
    *                           VIEWS
    *
    **********************************************************************
    */
    @NotNull
    private Button addItemButton;

    @NotNull
    private EditText addButtonName;

    @NotNull
    private Button removeItemButton;

    @NotNull
    private EditText removeItemName;

    @NotNull
    private EditText itemFilter;

    /*
    **********************************************************************
    *
    *                           METHODS
    *
    **********************************************************************
    */

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

        setContentView(R.layout.db_layout);

        addItemButton = (Button) findViewById(R.id.add_item_button);
        addButtonName = (EditText) findViewById(R.id.add_item_name);
        removeItemButton = (Button) findViewById(R.id.remove_item_button);
        removeItemName = (EditText) findViewById(R.id.remove_item_name);
        itemFilter = (EditText) findViewById(R.id.item_filter);

        addItemButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String itemName = addButtonName.getText().toString();
                if (StringUtils.isEmpty(itemName)) {
                    Toast.makeText(SamplesDbActivity.this, getString(R.string.name_is_empty), Toast.LENGTH_SHORT).show();
                } else {
                    addItem(itemName);
                }
            }
        });

        removeItemButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String itemName = removeItemName.getText().toString();
                if (StringUtils.isEmpty(itemName)) {
                    Toast.makeText(SamplesDbActivity.this, getString(R.string.name_is_empty), Toast.LENGTH_SHORT).show();
                } else {
                    removeItem(itemName);
                }
            }
        });

        itemFilter.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
            }

            @Override
            public void afterTextChanged(Editable s) {
                final String filter = s.toString();

                final ListItemArrayAdapter adapter = getListItemAdapter();
                adapter.clear();
                loadDbItems(filter);
            }
        });

        ListItemArrayAdapter.createAndAttach(getListView(), this, new ArrayList());

        loadDbItems(null);
    }

    private void loadDbItems(@Nullable final String filter) {
        new CommonAsyncTask>(this) {

            @Override
            protected List doWork(@NotNull List voids) {

                final Context context = getContext();

                final List result;
                if (context != null) {
                    result = new ArrayList();

                    final List dbItems;
                    if (StringUtils.isEmpty(filter)) {
                        dbItems = getDbItemService().getAllDbItems(context);
                    } else {
                        // NOTE: filter can be applied to Adapter. Usage here only in academical purposes
                        assert filter != null;
                        dbItems = getDbItemService().getAllStartsWith(filter, context);
                    }

                    for (DbItem dbItem : dbItems) {
                        result.add(new DbItemListItem(dbItem));
                    }
                } else {
                    result = Collections.emptyList();
                }

                return result;
            }

            @Override
            protected void onSuccessPostExecute(@Nullable List result) {
                getListItemAdapter().addAll(result);
            }

            @Override
            protected void onFailurePostExecute(@NotNull Exception e) {
                Toast.makeText(getContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }.execute((Void) null);
    }

    @SuppressWarnings("unchecked")
    @NotNull
    private ListItemArrayAdapter getListItemAdapter() {
        return (ListItemArrayAdapter) getListView().getAdapter();
    }

    private void removeItem(@NotNull String itemName) {
        new CommonAsyncTask>(this) {

            @Override
            protected List doWork(@NotNull List params) {
                assert params.size() == 1;
                final String itemName = params.get(0);

                final Context context = getContext();
                if (context != null) {
                    return getDbItemService().removeItemByName(itemName, context);
                }

                return Collections.emptyList();
            }

            @Override
            protected void onSuccessPostExecute(@Nullable List result) {
                assert result != null;

                SamplesDbActivity.this.removeItemName.setText("");
                Toast.makeText(getContext(), getString(R.string.items_removed, result.size()), Toast.LENGTH_SHORT).show();
                final ListItemArrayAdapter adapter = getListItemAdapter();
                for (DbItem dbItem : result) {
                    adapter.remove(new DbItemListItem(dbItem));
                }
            }

            @Override
            protected void onFailurePostExecute(@NotNull Exception e) {
                Toast.makeText(getContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }.execute(itemName);
    }

    private void addItem(@NotNull String itemName) {
        new CommonAsyncTask(this) {

            @Override
            protected DbItem doWork(@NotNull List params) {
                assert params.size() == 1;
                final String itemName = params.get(0);
                final DbItemImpl result = new DbItemImpl(itemName);

                final Context context = getContext();
                if (context != null) {
                    getDbItemService().addItem(result, context);
                }

                return result;
            }

            @Override
            protected void onSuccessPostExecute(@Nullable DbItem result) {
                assert result != null;

                SamplesDbActivity.this.addButtonName.setText("");
                Toast.makeText(getContext(), getString(R.string.item_saved), Toast.LENGTH_SHORT).show();
                getListItemAdapter().add(new DbItemListItem(result));
            }

            @Override
            protected void onFailurePostExecute(@NotNull Exception e) {
                Toast.makeText(getContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
            }
        }.execute(itemName);
    }

    @NotNull
    private DbItemService getDbItemService() {
        return SamplesApplication.getLocator().getDbItemService();
    }
}