/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.deskclock;

import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Parcelable;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;

import com.android.deskclock.provider.Alarm;
import com.android.deskclock.widget.selector.AlarmSelection;
import com.android.deskclock.widget.selector.AlarmSelectionAdapter;

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

public class AlarmSelectionActivity extends ListActivity {

    /** Used by default when an invalid action provided. */
    private static final int ACTION_INVALID = -1;

    /** Action used to signify alarm should be dismissed on selection. */
    public static final int ACTION_DISMISS = 0;

    public static final String EXTRA_ACTION = "com.android.deskclock.EXTRA_ACTION";
    public static final String EXTRA_ALARMS = "com.android.deskclock.EXTRA_ALARMS";

    private final List<AlarmSelection> mSelections = new ArrayList<>();

    private int mAction;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // this activity is shown if:
        // a) no search mode was specified in which case we show all
        // enabled alarms
        // b) if search mode was next and there was multiple alarms firing next
        // (at the same time) then we only show those alarms firing at the same time
        // c) if search mode was time and there are multiple alarms with that time
        // then we only show those alarms with that time

        super.onCreate(savedInstanceState);
        setContentView(R.layout.selection_layout);

        final Button cancelButton = (Button) findViewById(R.id.cancel_button);
        cancelButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

        final Intent intent = getIntent();
        final Parcelable[] alarmsFromIntent = intent.getParcelableArrayExtra(EXTRA_ALARMS);
        mAction = intent.getIntExtra(EXTRA_ACTION, ACTION_INVALID);

        // reading alarms from intent
        // PickSelection is started only if there are more than 1 relevant alarm
        // so no need to check if alarmsFromIntent is empty
        for (Parcelable parcelable : alarmsFromIntent) {
            final Alarm alarm = (Alarm) parcelable;

            // filling mSelections that go into the UI picker list
            final String label = String.format(Locale.US, "%d %02d", alarm.hour, alarm.minutes);
            mSelections.add(new AlarmSelection(label, alarm));
        }

        setListAdapter(new AlarmSelectionAdapter(this, R.layout.alarm_row, mSelections));
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        // id corresponds to mSelections id because the view adapter used mSelections
        final AlarmSelection selection = mSelections.get((int) id);
        final Alarm alarm = selection.getAlarm();
        if (alarm != null) {
            new ProcessAlarmActionAsync(alarm, this, mAction).execute();
        }
        finish();
    }

    private static class ProcessAlarmActionAsync extends AsyncTask<Void, Void, Void> {

        private final Alarm mAlarm;
        private final Activity mActivity;
        private final int mAction;

        public ProcessAlarmActionAsync(Alarm alarm, Activity activity, int action) {
            mAlarm = alarm;
            mActivity = activity;
            mAction = action;
        }

        @Override
        protected Void doInBackground(Void... parameters) {
            switch (mAction) {
                case ACTION_DISMISS:
                    HandleApiCalls.dismissAlarm(mAlarm, mActivity);
                    break;
                case ACTION_INVALID:
                    LogUtils.i("Invalid action");
            }
            return null;
        }
    }
}