/*
 * 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.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.os.Handler;
import android.provider.CallLog;
import android.provider.CallLog.Calls;
import android.support.v13.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.ActionBar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.ViewGroup;

import com.android.contacts.common.interactions.TouchPointManager;
import com.android.contacts.common.list.ViewPagerTabs;
import com.android.contacts.common.util.PermissionsUtil;
import com.android.contacts.commonbind.analytics.AnalyticsUtil;
import com.android.dialer.DialtactsActivity;
import com.android.dialer.R;
import com.android.dialer.TransactionSafeActivity;
import com.android.dialer.logging.Logger;
import com.android.dialer.util.DialerUtils;

public class CallLogActivity extends TransactionSafeActivity implements ViewPager.OnPageChangeListener {
    private ViewPager mViewPager;
    private ViewPagerTabs mViewPagerTabs;
    private ViewPagerAdapter mViewPagerAdapter;
    private CallLogFragment mAllCallsFragment;
    private CallLogFragment mMissedCallsFragment;

    private String[] mTabTitles;

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

    private static final int TAB_INDEX_COUNT = 2;

    private boolean mIsResumed;

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

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

        @Override
        public Fragment getItem(int position) {
            switch (getRtlPosition(position)) {
                case TAB_INDEX_ALL:
                    return new CallLogFragment(
                            CallLogQueryHandler.CALL_TYPE_ALL, true /* isCallLogActivity */);
                case TAB_INDEX_MISSED:
                    return new CallLogFragment(Calls.MISSED_TYPE, true /* isCallLogActivity */);
            }
            throw new IllegalStateException("No fragment at position " + position);
        }

        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            final CallLogFragment fragment =
                    (CallLogFragment) super.instantiateItem(container, position);
            switch (position) {
                case TAB_INDEX_ALL:
                    mAllCallsFragment = fragment;
                    break;
                case TAB_INDEX_MISSED:
                    mMissedCallsFragment = fragment;
                    break;
            }
            return fragment;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return mTabTitles[position];
        }

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

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            TouchPointManager.getInstance().setPoint((int) ev.getRawX(), (int) ev.getRawY());
        }
        return super.dispatchTouchEvent(ev);
    }

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

        setContentView(R.layout.call_log_activity);
        getWindow().setBackgroundDrawable(null);

        final ActionBar actionBar = getSupportActionBar();
        actionBar.setDisplayShowHomeEnabled(true);
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setDisplayShowTitleEnabled(true);
        actionBar.setElevation(0);

        int startingTab = TAB_INDEX_ALL;
        final Intent intent = getIntent();
        if (intent != null) {
            final int callType = intent.getIntExtra(CallLog.Calls.EXTRA_CALL_TYPE_FILTER, -1);
            if (callType == CallLog.Calls.MISSED_TYPE) {
                startingTab = TAB_INDEX_MISSED;
            }
        }

        mTabTitles = new String[TAB_INDEX_COUNT];
        mTabTitles[0] = getString(R.string.call_log_all_title);
        mTabTitles[1] = getString(R.string.call_log_missed_title);

        mViewPager = (ViewPager) findViewById(R.id.call_log_pager);

        mViewPagerAdapter = new ViewPagerAdapter(getFragmentManager());
        mViewPager.setAdapter(mViewPagerAdapter);
        mViewPager.setOffscreenPageLimit(1);
        mViewPager.setOnPageChangeListener(this);

        mViewPagerTabs = (ViewPagerTabs) findViewById(R.id.viewpager_header);

        mViewPagerTabs.setViewPager(mViewPager);
        mViewPager.setCurrentItem(startingTab);
    }

    @Override
    protected void onResume() {
        mIsResumed = true;
        super.onResume();
        sendScreenViewForChildFragment(mViewPager.getCurrentItem());
    }

    @Override
    protected void onPause() {
        mIsResumed = false;
        super.onPause();
    }

    @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 (mAllCallsFragment != null && itemDeleteAll != null) {
            // If onPrepareOptionsMenu is called before fragments are loaded, don't do anything.
            final CallLogAdapter adapter = mAllCallsFragment.getAdapter();
            itemDeleteAll.setVisible(adapter != null && !adapter.isEmpty());
        }
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (!isSafeToCommitTransactions()) {
            return true;
        }

        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);
    }

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

    @Override
    public void onPageSelected(int position) {
        if (mIsResumed) {
            sendScreenViewForChildFragment(position);
        }
        mViewPagerTabs.onPageSelected(position);
    }

    @Override
    public void onPageScrollStateChanged(int state) {
        mViewPagerTabs.onPageScrollStateChanged(state);
    }

    private void sendScreenViewForChildFragment(int position) {
        Logger.logScreenView(CallLogFragment.class.getSimpleName(), this,
                getFragmentTagForPosition(position));
    }

    /**
     * Returns the fragment located at the given position in the {@link ViewPagerAdapter}. May
     * be null if the position is invalid.
     */
    private String getFragmentTagForPosition(int position) {
        switch (position) {
            case TAB_INDEX_ALL:
                return "All";
            case TAB_INDEX_MISSED:
                return "Missed";
        }
        return null;
    }

    private int getRtlPosition(int position) {
        if (DialerUtils.isRtl()) {
            return mViewPagerAdapter.getCount() - 1 - position;
        }
        return position;
    }
}