/*
 * Copyright (C) 2017 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.systemui.qs;

import static android.app.StatusBarManager.DISABLE2_QUICK_SETTINGS;

import android.content.Context;
import android.content.Intent;
import android.content.pm.UserInfo;
import android.content.res.ColorStateList;
import android.content.res.Configuration;
import android.graphics.PorterDuff.Mode;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.RippleDrawable;
import android.os.UserManager;
import android.support.annotation.Nullable;
import android.support.annotation.VisibleForTesting;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.Toast;

import com.android.internal.logging.MetricsLogger;
import com.android.internal.logging.nano.MetricsProto;
import com.android.keyguard.CarrierText;
import com.android.keyguard.KeyguardUpdateMonitor;
import com.android.settingslib.Utils;
import com.android.settingslib.drawable.UserIconDrawable;
import com.android.settingslib.graph.SignalDrawable;
import com.android.systemui.Dependency;
import com.android.systemui.R;
import com.android.systemui.R.dimen;
import com.android.systemui.plugins.ActivityStarter;
import com.android.systemui.qs.TouchAnimator.Builder;
import com.android.systemui.statusbar.phone.MultiUserSwitch;
import com.android.systemui.statusbar.phone.SettingsButton;
import com.android.systemui.statusbar.policy.DeviceProvisionedController;
import com.android.systemui.statusbar.policy.NetworkController;
import com.android.systemui.statusbar.policy.NetworkController.EmergencyListener;
import com.android.systemui.statusbar.policy.NetworkController.SignalCallback;
import com.android.systemui.statusbar.policy.UserInfoController;
import com.android.systemui.statusbar.policy.UserInfoController.OnUserInfoChangedListener;
import com.android.systemui.tuner.TunerService;

public class QSFooterImpl extends FrameLayout implements QSFooter,
        OnClickListener, OnUserInfoChangedListener, EmergencyListener, SignalCallback {

    private ActivityStarter mActivityStarter;
    private UserInfoController mUserInfoController;
    private SettingsButton mSettingsButton;
    protected View mSettingsContainer;
    private CarrierText mCarrierText;

    private boolean mQsDisabled;
    private QSPanel mQsPanel;

    private boolean mExpanded;

    private boolean mListening;

    private boolean mShowEmergencyCallsOnly;
    private View mDivider;
    protected MultiUserSwitch mMultiUserSwitch;
    private ImageView mMultiUserAvatar;

    protected TouchAnimator mFooterAnimator;
    private float mExpansionAmount;

    protected View mEdit;
    private TouchAnimator mSettingsCogAnimator;

    private View mActionsContainer;
    private View mDragHandle;
    private View mMobileGroup;
    private ImageView mMobileSignal;
    private ImageView mMobileRoaming;
    private final int mColorForeground;
    private final CellSignalState mInfo = new CellSignalState();

    public QSFooterImpl(Context context, AttributeSet attrs) {
        super(context, attrs);
        mColorForeground = Utils.getColorAttr(context, android.R.attr.colorForeground);
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        mDivider = findViewById(R.id.qs_footer_divider);
        mEdit = findViewById(android.R.id.edit);
        mEdit.setOnClickListener(view ->
                Dependency.get(ActivityStarter.class).postQSRunnableDismissingKeyguard(() ->
                        mQsPanel.showEdit(view)));

        mSettingsButton = findViewById(R.id.settings_button);
        mSettingsContainer = findViewById(R.id.settings_button_container);
        mSettingsButton.setOnClickListener(this);

        mMobileGroup = findViewById(R.id.mobile_combo);
        mMobileSignal = findViewById(R.id.mobile_signal);
        mMobileRoaming = findViewById(R.id.mobile_roaming);
        mCarrierText = findViewById(R.id.qs_carrier_text);
        mCarrierText.setDisplayFlags(
                CarrierText.FLAG_HIDE_AIRPLANE_MODE | CarrierText.FLAG_HIDE_MISSING_SIM);

        mMultiUserSwitch = findViewById(R.id.multi_user_switch);
        mMultiUserAvatar = mMultiUserSwitch.findViewById(R.id.multi_user_avatar);

        mDragHandle = findViewById(R.id.qs_drag_handle_view);
        mActionsContainer = findViewById(R.id.qs_footer_actions_container);

        // RenderThread is doing more harm than good when touching the header (to expand quick
        // settings), so disable it for this view
        ((RippleDrawable) mSettingsButton.getBackground()).setForceSoftware(true);

        updateResources();

        mUserInfoController = Dependency.get(UserInfoController.class);
        mActivityStarter = Dependency.get(ActivityStarter.class);
        addOnLayoutChangeListener((v, left, top, right, bottom, oldLeft, oldTop, oldRight,
                oldBottom) -> updateAnimator(right - left));
    }

    private void updateAnimator(int width) {
        int numTiles = QuickQSPanel.getNumQuickTiles(mContext);
        int size = mContext.getResources().getDimensionPixelSize(R.dimen.qs_quick_tile_size)
                - mContext.getResources().getDimensionPixelSize(dimen.qs_quick_tile_padding);
        int remaining = (width - numTiles * size) / (numTiles - 1);
        int defSpace = mContext.getResources().getDimensionPixelOffset(R.dimen.default_gear_space);

        mSettingsCogAnimator = new Builder()
                .addFloat(mSettingsContainer, "translationX",
                        isLayoutRtl() ? (remaining - defSpace) : -(remaining - defSpace), 0)
                .addFloat(mSettingsButton, "rotation", -120, 0)
                .build();

        setExpansion(mExpansionAmount);
    }

    @Override
    protected void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        updateResources();
    }

    @Override
    public void onRtlPropertiesChanged(int layoutDirection) {
        super.onRtlPropertiesChanged(layoutDirection);
        updateResources();
    }

    private void updateResources() {
        updateFooterAnimator();
    }

    private void updateFooterAnimator() {
        mFooterAnimator = createFooterAnimator();
    }

    @Nullable
    private TouchAnimator createFooterAnimator() {
        return new TouchAnimator.Builder()
                .addFloat(mDivider, "alpha", 0, 1)
                .addFloat(mCarrierText, "alpha", 0, 0, 1)
                .addFloat(mMobileGroup, "alpha", 0, 1)
                .addFloat(mActionsContainer, "alpha", 0, 1)
                .addFloat(mDragHandle, "alpha", 1, 0, 0)
                .setStartDelay(0.15f)
                .build();
    }

    @Override
    public void setKeyguardShowing(boolean keyguardShowing) {
        setExpansion(mExpansionAmount);
    }

    @Override
    public void setExpanded(boolean expanded) {
        if (mExpanded == expanded) return;
        mExpanded = expanded;
        updateEverything();
    }

    @Override
    public void setExpansion(float headerExpansionFraction) {
        mExpansionAmount = headerExpansionFraction;
        if (mSettingsCogAnimator != null) mSettingsCogAnimator.setPosition(headerExpansionFraction);

        if (mFooterAnimator != null) {
            mFooterAnimator.setPosition(headerExpansionFraction);
        }
    }

    @Override
    @VisibleForTesting
    public void onDetachedFromWindow() {
        setListening(false);
        super.onDetachedFromWindow();
    }

    @Override
    public void setListening(boolean listening) {
        if (listening == mListening) {
            return;
        }
        mListening = listening;
        updateListeners();
    }

    @Override
    public View getExpandView() {
        return findViewById(R.id.expand_indicator);
    }

    @Override
    public void disable(int state1, int state2, boolean animate) {
        final boolean disabled = (state2 & DISABLE2_QUICK_SETTINGS) != 0;
        if (disabled == mQsDisabled) return;
        mQsDisabled = disabled;
        updateEverything();
    }

    public void updateEverything() {
        post(() -> {
            updateVisibilities();
            setClickable(false);
        });
    }

    private void updateVisibilities() {
        mSettingsContainer.setVisibility(mQsDisabled ? View.GONE : View.VISIBLE);
        mSettingsContainer.findViewById(R.id.tuner_icon).setVisibility(
                TunerService.isTunerEnabled(mContext) ? View.VISIBLE : View.INVISIBLE);
        final boolean isDemo = UserManager.isDeviceInDemoMode(mContext);
        mMultiUserSwitch.setVisibility(showUserSwitcher(isDemo) ? View.VISIBLE : View.INVISIBLE);
        mEdit.setVisibility(isDemo || !mExpanded ? View.INVISIBLE : View.VISIBLE);
    }

    private boolean showUserSwitcher(boolean isDemo) {
        if (!mExpanded || isDemo || !UserManager.supportsMultipleUsers()) {
            return false;
        }
        UserManager userManager = UserManager.get(mContext);
        if (userManager.hasUserRestriction(UserManager.DISALLOW_USER_SWITCH)) {
            return false;
        }
        int switchableUserCount = 0;
        for (UserInfo user : userManager.getUsers(true)) {
            if (user.supportsSwitchToByUser()) {
                ++switchableUserCount;
                if (switchableUserCount > 1) {
                    return true;
                }
            }
        }
        return getResources().getBoolean(R.bool.qs_show_user_switcher_for_single_user);
    }

    private void updateListeners() {
        if (mListening) {
            mUserInfoController.addCallback(this);
            if (Dependency.get(NetworkController.class).hasVoiceCallingFeature()) {
                Dependency.get(NetworkController.class).addEmergencyListener(this);
                Dependency.get(NetworkController.class).addCallback(this);
            }
        } else {
            mUserInfoController.removeCallback(this);
            Dependency.get(NetworkController.class).removeEmergencyListener(this);
            Dependency.get(NetworkController.class).removeCallback(this);
        }
    }

    @Override
    public void setQSPanel(final QSPanel qsPanel) {
        mQsPanel = qsPanel;
        if (mQsPanel != null) {
            mMultiUserSwitch.setQsPanel(qsPanel);
        }
    }

    @Override
    public void onClick(View v) {
        // Don't do anything until view are unhidden
        if (!mExpanded) {
            return;
        }

        if (v == mSettingsButton) {
            if (!Dependency.get(DeviceProvisionedController.class).isCurrentUserSetup()) {
                // If user isn't setup just unlock the device and dump them back at SUW.
                mActivityStarter.postQSRunnableDismissingKeyguard(() -> { });
                return;
            }
            MetricsLogger.action(mContext,
                    mExpanded ? MetricsProto.MetricsEvent.ACTION_QS_EXPANDED_SETTINGS_LAUNCH
                            : MetricsProto.MetricsEvent.ACTION_QS_COLLAPSED_SETTINGS_LAUNCH);
            if (mSettingsButton.isTunerClick()) {
                Dependency.get(ActivityStarter.class).postQSRunnableDismissingKeyguard(() -> {
                    if (TunerService.isTunerEnabled(mContext)) {
                        TunerService.showResetRequest(mContext, () -> {
                            // Relaunch settings so that the tuner disappears.
                            startSettingsActivity();
                        });
                    } else {
                        Toast.makeText(getContext(), R.string.tuner_toast,
                                Toast.LENGTH_LONG).show();
                        TunerService.setTunerEnabled(mContext, true);
                    }
                    startSettingsActivity();

                });
            } else {
                startSettingsActivity();
            }
        }
    }

    private void startSettingsActivity() {
        mActivityStarter.startActivity(new Intent(android.provider.Settings.ACTION_SETTINGS),
                true /* dismissShade */);
    }

    @Override
    public void setEmergencyCallsOnly(boolean show) {
        boolean changed = show != mShowEmergencyCallsOnly;
        if (changed) {
            mShowEmergencyCallsOnly = show;
            if (mExpanded) {
                updateEverything();
            }
        }
    }

    @Override
    public void onUserInfoChanged(String name, Drawable picture, String userAccount) {
        if (picture != null &&
                UserManager.get(mContext).isGuestUser(KeyguardUpdateMonitor.getCurrentUser()) &&
                !(picture instanceof UserIconDrawable)) {
            picture = picture.getConstantState().newDrawable(mContext.getResources()).mutate();
            picture.setColorFilter(
                    Utils.getColorAttr(mContext, android.R.attr.colorForeground),
                    Mode.SRC_IN);
        }
        mMultiUserAvatar.setImageDrawable(picture);
    }

    private void handleUpdateState() {
        mMobileGroup.setVisibility(mInfo.visible ? View.VISIBLE : View.GONE);
        if (mInfo.visible) {
            mMobileRoaming.setVisibility(mInfo.roaming ? View.VISIBLE : View.GONE);
            mMobileRoaming.setImageTintList(ColorStateList.valueOf(mColorForeground));
            SignalDrawable d = new SignalDrawable(mContext);
            d.setDarkIntensity(QuickStatusBarHeader.getColorIntensity(mColorForeground));
            mMobileSignal.setImageDrawable(d);
            mMobileSignal.setImageLevel(mInfo.mobileSignalIconId);

            StringBuilder contentDescription = new StringBuilder();
            if (mInfo.contentDescription != null) {
                contentDescription.append(mInfo.contentDescription).append(", ");
            }
            if (mInfo.roaming) {
                contentDescription
                        .append(mContext.getString(R.string.data_connection_roaming))
                        .append(", ");
            }
            // TODO: show mobile data off/no internet text for 5 seconds before carrier text
            if (TextUtils.equals(mInfo.typeContentDescription,
                    mContext.getString(R.string.data_connection_no_internet))
                || TextUtils.equals(mInfo.typeContentDescription,
                    mContext.getString(R.string.cell_data_off))) {
                contentDescription.append(mInfo.typeContentDescription);
            }
            mMobileSignal.setContentDescription(contentDescription);
        }
    }

    @Override
    public void setMobileDataIndicators(NetworkController.IconState statusIcon,
            NetworkController.IconState qsIcon, int statusType,
            int qsType, boolean activityIn, boolean activityOut,
            String typeContentDescription,
            String description, boolean isWide, int subId, boolean roaming) {
        mInfo.visible = statusIcon.visible;
        mInfo.mobileSignalIconId = statusIcon.icon;
        mInfo.contentDescription = statusIcon.contentDescription;
        mInfo.typeContentDescription = typeContentDescription;
        mInfo.roaming = roaming;
        handleUpdateState();
    }

    @Override
    public void setNoSims(boolean hasNoSims, boolean simDetected) {
        if (hasNoSims) {
            mInfo.visible = false;
        }
        handleUpdateState();
    }

    private final class CellSignalState {
        boolean visible;
        int mobileSignalIconId;
        public String contentDescription;
        String typeContentDescription;
        boolean roaming;
    }
}