/*
 * Copyright (C) 2013 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.dialer.calllog;

import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.provider.CallLog.Calls;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.PagerTabStrip;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.style.TypefaceSpan;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

import com.android.dialer.DialtactsActivity;
import com.android.dialer.R;
import com.android.dialer.calllog.CallLogFragment;

public class CallLogActivity extends Activity {

    private ViewPager mViewPager;
    private ViewPagerAdapter mViewPagerAdapter;
    private CallLogFragment mAllCallsFragment;
    private CallLogFragment mMissedCallsFragment;

    private static final int TAB_INDEX_ALL = 0;
    private static final int TAB_INDEX_MISSED = 1;

    private static final int TAB_INDEX_COUNT = 2;

    public class ViewPagerAdapter extends FragmentPagerAdapter {
        public ViewPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            switch (position) {
                case TAB_INDEX_ALL:
                    mAllCallsFragment = new CallLogFragment(CallLogQueryHandler.CALL_TYPE_ALL);
                    return mAllCallsFragment;
                case TAB_INDEX_MISSED:
                    mMissedCallsFragment = new CallLogFragment(Calls.MISSED_TYPE);
                    return mMissedCallsFragment;
            }
            throw new IllegalStateException("No fragment at position " + position);
        }

        @Override
        public int getCount() {
            return TAB_INDEX_COUNT;
        }
    }

    private final TabListener mTabListener = new TabListener() {
        @Override
        public void onTabUnselected(Tab tab, FragmentTransaction ft) {
        }

        @Override
        public void onTabSelected(Tab tab, FragmentTransaction ft) {
            if (mViewPager != null && mViewPager.getCurrentItem() != tab.getPosition()) {
                mViewPager.setCurrentItem(tab.getPosition(), true);
            }
        }

        @Override
        public void onTabReselected(Tab tab, FragmentTransaction ft) {
        }
    };

    private final OnPageChangeListener mOnPageChangeListener = new OnPageChangeListener() {

        @Override
        public void onPageScrolled(
                int position, float positionOffset, int positionOffsetPixels) {}

        @Override
        public void onPageSelected(int position) {
            final ActionBar actionBar = getActionBar();
            actionBar.selectTab(actionBar.getTabAt(position));
        }

        @Override
        public void onPageScrollStateChanged(int arg0) {
        }
    };

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

        setContentView(R.layout.call_log_activity);

        final ActionBar actionBar = getActionBar();
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        actionBar.setDisplayShowHomeEnabled(true);
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setDisplayShowTitleEnabled(true);

        final SpannableString s = new SpannableString(getString(R.string.call_log_activity_title));
        s.setSpan(new TypefaceSpan(getString(R.string.call_log_activity_title_font_family)), 0,
                s.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        actionBar.setTitle(s);

        final Tab allTab = actionBar.newTab();
        final String allTitle = getString(R.string.call_log_all_title);
        allTab.setContentDescription(allTitle);
        allTab.setText(allTitle);
        allTab.setTabListener(mTabListener);
        actionBar.addTab(allTab);

        final Tab missedTab = actionBar.newTab();
        final String missedTitle = getString(R.string.call_log_missed_title);
        missedTab.setContentDescription(missedTitle);
        missedTab.setText(missedTitle);
        missedTab.setTabListener(mTabListener);
        actionBar.addTab(missedTab);

        mViewPager = (ViewPager) findViewById(R.id.call_log_pager);
        mViewPagerAdapter = new ViewPagerAdapter(getFragmentManager());
        mViewPager.setAdapter(mViewPagerAdapter);
        mViewPager.setOnPageChangeListener(mOnPageChangeListener);
        mViewPager.setOffscreenPageLimit(1);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        final MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.call_log_options, menu);
        return true;
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        final MenuItem itemDeleteAll = menu.findItem(R.id.delete_all);

        // If onPrepareOptionsMenu is called before fragments loaded. Don't do anything.
        if (mAllCallsFragment != null && itemDeleteAll != null) {
            final CallLogAdapter adapter = mAllCallsFragment.getAdapter();
            itemDeleteAll.setEnabled(adapter != null && !adapter.isEmpty());
        }
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                final Intent intent = new Intent(this, DialtactsActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(intent);
                return true;
            case R.id.delete_all:
                ClearCallLogDialog.show(getFragmentManager());
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}