/*
 * 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.settings.biometrics.fingerprint;

import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.annotation.Nullable;
import android.app.Dialog;
import android.app.settings.SettingsEnums;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.Animatable2;
import android.graphics.drawable.AnimatedVectorDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.LayerDrawable;
import android.hardware.fingerprint.FingerprintManager;
import android.hardware.fingerprint.FingerprintSensorPropertiesInternal;
import android.media.AudioAttributes;
import android.os.Bundle;
import android.os.VibrationEffect;
import android.os.Vibrator;
import android.text.TextUtils;
import android.util.Log;
import android.view.MotionEvent;
import android.view.OrientationEventListener;
import android.view.Surface;
import android.view.View;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityManager;
import android.view.animation.AnimationUtils;
import android.view.animation.Interpolator;
import android.widget.ProgressBar;
import android.widget.TextView;

import androidx.appcompat.app.AlertDialog;

import com.android.settings.R;
import com.android.settings.biometrics.BiometricEnrollSidecar;
import com.android.settings.biometrics.BiometricUtils;
import com.android.settings.biometrics.BiometricsEnrollEnrolling;
import com.android.settings.core.instrumentation.InstrumentedDialogFragment;

import com.google.android.setupcompat.template.FooterBarMixin;
import com.google.android.setupcompat.template.FooterButton;
import com.google.android.setupcompat.util.WizardManagerHelper;

import java.util.List;

/**
 * Activity which handles the actual enrolling for fingerprint.
 */
public class FingerprintEnrollEnrolling extends BiometricsEnrollEnrolling {

    private static final String TAG = "FingerprintEnrollEnrolling";
    static final String TAG_SIDECAR = "sidecar";

    private static final int PROGRESS_BAR_MAX = 10000;
    private static final int FINISH_DELAY = 250;
    /**
     * Enroll with two center touches before going to guided enrollment.
     */
    private static final int NUM_CENTER_TOUCHES = 2;

    /**
     * If we don't see progress during this time, we show an error message to remind the users that
     * they need to lift the finger and touch again.
     */
    private static final int HINT_TIMEOUT_DURATION = 2500;

    /**
     * How long the user needs to touch the icon until we show the dialog.
     */
    private static final long ICON_TOUCH_DURATION_UNTIL_DIALOG_SHOWN = 500;

    /**
     * How many times the user needs to touch the icon until we show the dialog that this is not the
     * fingerprint sensor.
     */
    private static final int ICON_TOUCH_COUNT_SHOW_UNTIL_DIALOG_SHOWN = 3;

    private static final VibrationEffect VIBRATE_EFFECT_ERROR =
            VibrationEffect.createWaveform(new long[] {0, 5, 55, 60}, -1);
    private static final AudioAttributes FINGERPRINT_ENROLLING_SONFICATION_ATTRIBUTES =
            new AudioAttributes.Builder()
                    .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
                    .setUsage(AudioAttributes.USAGE_ASSISTANCE_SONIFICATION)
                    .build();

    private boolean mCanAssumeUdfps;
    @Nullable private ProgressBar mProgressBar;
    private ObjectAnimator mProgressAnim;
    private TextView mDescriptionText;
    private TextView mErrorText;
    private Interpolator mFastOutSlowInInterpolator;
    private Interpolator mLinearOutSlowInInterpolator;
    private Interpolator mFastOutLinearInInterpolator;
    private int mIconTouchCount;
    private boolean mAnimationCancelled;
    @Nullable private AnimatedVectorDrawable mIconAnimationDrawable;
    @Nullable private AnimatedVectorDrawable mIconBackgroundBlinksDrawable;
    private boolean mRestoring;
    private Vibrator mVibrator;
    private boolean mIsSetupWizard;
    private AccessibilityManager mAccessibilityManager;
    private boolean mIsAccessibilityEnabled;

    private OrientationEventListener mOrientationEventListener;
    private int mPreviousRotation = 0;

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

        final FingerprintManager fingerprintManager = getSystemService(FingerprintManager.class);
        final List<FingerprintSensorPropertiesInternal> props =
                fingerprintManager.getSensorPropertiesInternal();
        mCanAssumeUdfps = props.size() == 1 && props.get(0).isAnyUdfpsType();

        mAccessibilityManager = getSystemService(AccessibilityManager.class);
        mIsAccessibilityEnabled = mAccessibilityManager.isEnabled();

        listenOrientationEvent();

        if (mCanAssumeUdfps) {
            if (BiometricUtils.isReverseLandscape(getApplicationContext())) {
                setContentView(R.layout.udfps_enroll_enrolling_land);
            } else {
                setContentView(R.layout.udfps_enroll_enrolling);
            }
            setDescriptionText(R.string.security_settings_udfps_enroll_start_message);
        } else {
            setContentView(R.layout.fingerprint_enroll_enrolling);
            setDescriptionText(R.string.security_settings_fingerprint_enroll_start_message);
        }

        mIsSetupWizard = WizardManagerHelper.isAnySetupWizard(getIntent());
        if (mCanAssumeUdfps) {
            updateTitleAndDescription();
        } else {
            setHeaderText(R.string.security_settings_fingerprint_enroll_repeat_title);
        }

        mErrorText = findViewById(R.id.error_text);
        mProgressBar = findViewById(R.id.fingerprint_progress_bar);
        mVibrator = getSystemService(Vibrator.class);

        mFooterBarMixin = getLayout().getMixin(FooterBarMixin.class);
        mFooterBarMixin.setSecondaryButton(
                new FooterButton.Builder(this)
                        .setText(R.string.security_settings_fingerprint_enroll_enrolling_skip)
                        .setListener(this::onSkipButtonClick)
                        .setButtonType(FooterButton.ButtonType.SKIP)
                        .setTheme(R.style.SudGlifButton_Secondary)
                        .build()
        );

        final LayerDrawable fingerprintDrawable = mProgressBar != null
                ? (LayerDrawable) mProgressBar.getBackground() : null;
        if (fingerprintDrawable != null) {
            mIconAnimationDrawable = (AnimatedVectorDrawable)
                    fingerprintDrawable.findDrawableByLayerId(R.id.fingerprint_animation);
            mIconBackgroundBlinksDrawable = (AnimatedVectorDrawable)
                    fingerprintDrawable.findDrawableByLayerId(R.id.fingerprint_background);
            mIconAnimationDrawable.registerAnimationCallback(mIconAnimationCallback);
        }

        mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(
                this, android.R.interpolator.fast_out_slow_in);
        mLinearOutSlowInInterpolator = AnimationUtils.loadInterpolator(
                this, android.R.interpolator.linear_out_slow_in);
        mFastOutLinearInInterpolator = AnimationUtils.loadInterpolator(
                this, android.R.interpolator.fast_out_linear_in);
        if (mProgressBar != null) {
            mProgressBar.setOnTouchListener((v, event) -> {
                if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
                    mIconTouchCount++;
                    if (mIconTouchCount == ICON_TOUCH_COUNT_SHOW_UNTIL_DIALOG_SHOWN) {
                        showIconTouchDialog();
                    } else {
                        mProgressBar.postDelayed(mShowDialogRunnable,
                                ICON_TOUCH_DURATION_UNTIL_DIALOG_SHOWN);
                    }
                } else if (event.getActionMasked() == MotionEvent.ACTION_CANCEL
                        || event.getActionMasked() == MotionEvent.ACTION_UP) {
                    mProgressBar.removeCallbacks(mShowDialogRunnable);
                }
                return true;
            });
        }
        mRestoring = savedInstanceState != null;
    }

    @Override
    protected BiometricEnrollSidecar getSidecar() {
        final FingerprintEnrollSidecar sidecar = new FingerprintEnrollSidecar();
        sidecar.setEnrollReason(FingerprintManager.ENROLL_ENROLL);
        return sidecar;
    }

    @Override
    protected boolean shouldStartAutomatically() {
        if (mCanAssumeUdfps) {
            // Continue enrollment if restoring (e.g. configuration changed). Otherwise, wait
            // for the entry animation to complete before starting.
            return mRestoring;
        }
        return true;
    }

    @Override
    protected void onStart() {
        super.onStart();
        updateProgress(false /* animate */);
        updateTitleAndDescription();
        if (mRestoring) {
            startIconAnimation();
        }
    }

    @Override
    public void onEnterAnimationComplete() {
        super.onEnterAnimationComplete();

        if (mCanAssumeUdfps) {
            startEnrollment();
        }

        mAnimationCancelled = false;
        startIconAnimation();
    }

    private void startIconAnimation() {
        if (mIconAnimationDrawable != null) {
            mIconAnimationDrawable.start();
        }
    }

    private void stopIconAnimation() {
        mAnimationCancelled = true;
        if (mIconAnimationDrawable != null) {
            mIconAnimationDrawable.stop();
        }
    }

    @Override
    protected void onStop() {
        super.onStop();
        stopIconAnimation();
    }

    @Override
    protected void onDestroy() {
        stopListenOrientationEvent();
        super.onDestroy();
    }

    private void animateProgress(int progress) {
        if (mCanAssumeUdfps) {
            // UDFPS animations are owned by SystemUI
            if (progress >= PROGRESS_BAR_MAX) {
                // Wait for any animations in SysUI to finish, then proceed to next page
                getMainThreadHandler().postDelayed(mDelayedFinishRunnable, FINISH_DELAY);
            }
            return;
        }
        if (mProgressAnim != null) {
            mProgressAnim.cancel();
        }
        ObjectAnimator anim = ObjectAnimator.ofInt(mProgressBar, "progress",
                mProgressBar.getProgress(), progress);
        anim.addListener(mProgressAnimationListener);
        anim.setInterpolator(mFastOutSlowInInterpolator);
        anim.setDuration(250);
        anim.start();
        mProgressAnim = anim;
    }

    private void animateFlash() {
        if (mIconBackgroundBlinksDrawable != null) {
            mIconBackgroundBlinksDrawable.start();
        }
    }

    protected Intent getFinishIntent() {
        return new Intent(this, FingerprintEnrollFinish.class);
    }

    private void updateTitleAndDescription() {
        if (mSidecar == null || mSidecar.getEnrollmentSteps() == -1) {
            if (mCanAssumeUdfps) {
                // setHeaderText(R.string.security_settings_fingerprint_enroll_udfps_title);
                // Don't use BiometricEnrollBase#setHeaderText, since that invokes setTitle,
                // which gets announced for a11y upon entering the page. For UDFPS, we want to
                // announce a different string for a11y upon entering the page.
                getLayout().setHeaderText(
                        R.string.security_settings_fingerprint_enroll_udfps_title);
                setDescriptionText(R.string.security_settings_udfps_enroll_start_message);

                final CharSequence description = getString(
                        R.string.security_settings_udfps_enroll_a11y);
                getLayout().getHeaderTextView().setContentDescription(description);
                setTitle(description);
            } else {
                setDescriptionText(R.string.security_settings_fingerprint_enroll_start_message);
            }
        } else if (mCanAssumeUdfps && !isCenterEnrollmentComplete()) {
            if (mIsSetupWizard) {
                setHeaderText(R.string.security_settings_udfps_enroll_title_one_more_time);
            } else {
                setHeaderText(R.string.security_settings_fingerprint_enroll_repeat_title);
            }
            setDescriptionText(R.string.security_settings_udfps_enroll_start_message);
        } else {
            if (mCanAssumeUdfps) {
                setHeaderText(R.string.security_settings_fingerprint_enroll_repeat_title);
                if (mIsAccessibilityEnabled) {
                    setDescriptionText(R.string.security_settings_udfps_enroll_repeat_a11y_message);
                } else {
                    setDescriptionText(R.string.security_settings_udfps_enroll_repeat_message);
                }
            } else {
                setDescriptionText(R.string.security_settings_fingerprint_enroll_repeat_message);
            }
        }
    }

    private boolean isCenterEnrollmentComplete() {
        if (mSidecar == null || mSidecar.getEnrollmentSteps() == -1) {
            return false;
        }
        final int stepsEnrolled = mSidecar.getEnrollmentSteps() - mSidecar.getEnrollmentRemaining();
        return stepsEnrolled >= NUM_CENTER_TOUCHES;
    }

    @Override
    public void onEnrollmentHelp(int helpMsgId, CharSequence helpString) {
        if (!TextUtils.isEmpty(helpString)) {
            if (!mCanAssumeUdfps) {
                mErrorText.removeCallbacks(mTouchAgainRunnable);
            }
            showError(helpString);
        }
    }

    @Override
    public void onEnrollmentError(int errMsgId, CharSequence errString) {
        FingerprintErrorDialog.showErrorDialog(this, errMsgId);
        stopIconAnimation();
        if (!mCanAssumeUdfps) {
            mErrorText.removeCallbacks(mTouchAgainRunnable);
        }
    }

    @Override
    public void onEnrollmentProgressChange(int steps, int remaining) {
        updateProgress(true /* animate */);
        updateTitleAndDescription();
        clearError();
        animateFlash();
        if (!mCanAssumeUdfps) {
            mErrorText.removeCallbacks(mTouchAgainRunnable);
            mErrorText.postDelayed(mTouchAgainRunnable, HINT_TIMEOUT_DURATION);
        } else {
            if (mIsAccessibilityEnabled) {
                final int percent = (int) (((float)(steps - remaining) / (float) steps) * 100);
                CharSequence cs = getString(
                        R.string.security_settings_udfps_enroll_progress_a11y_message, percent);
                AccessibilityEvent e = AccessibilityEvent.obtain();
                e.setEventType(AccessibilityEvent.TYPE_ANNOUNCEMENT);
                e.setClassName(getClass().getName());
                e.setPackageName(getPackageName());
                e.getText().add(cs);
                mAccessibilityManager.sendAccessibilityEvent(e);
            }
        }
    }

    private void updateProgress(boolean animate) {
        if (mSidecar == null || !mSidecar.isEnrolling()) {
            Log.d(TAG, "Enrollment not started yet");
            return;
        }

        int progress = getProgress(
                mSidecar.getEnrollmentSteps(), mSidecar.getEnrollmentRemaining());
        if (animate) {
            animateProgress(progress);
        } else {
            if (mProgressBar != null) {
                mProgressBar.setProgress(progress);
            }
            if (progress >= PROGRESS_BAR_MAX) {
                mDelayedFinishRunnable.run();
            }
        }
    }

    private int getProgress(int steps, int remaining) {
        if (steps == -1) {
            return 0;
        }
        int progress = Math.max(0, steps + 1 - remaining);
        return PROGRESS_BAR_MAX * progress / (steps + 1);
    }

    private void showIconTouchDialog() {
        mIconTouchCount = 0;
        new IconTouchDialog().show(getSupportFragmentManager(), null /* tag */);
    }

    private void showError(CharSequence error) {
        if (mCanAssumeUdfps) {
            setHeaderText(error);
            // Show nothing for subtitle when getting an error message.
            setDescriptionText("");
        } else {
            mErrorText.setText(error);
            if (mErrorText.getVisibility() == View.INVISIBLE) {
                mErrorText.setVisibility(View.VISIBLE);
                mErrorText.setTranslationY(getResources().getDimensionPixelSize(
                        R.dimen.fingerprint_error_text_appear_distance));
                mErrorText.setAlpha(0f);
                mErrorText.animate()
                        .alpha(1f)
                        .translationY(0f)
                        .setDuration(200)
                        .setInterpolator(mLinearOutSlowInInterpolator)
                        .start();
            } else {
                mErrorText.animate().cancel();
                mErrorText.setAlpha(1f);
                mErrorText.setTranslationY(0f);
            }
        }
        if (isResumed()) {
            mVibrator.vibrate(VIBRATE_EFFECT_ERROR, FINGERPRINT_ENROLLING_SONFICATION_ATTRIBUTES);
        }
    }

    private void clearError() {
        if (!mCanAssumeUdfps && mErrorText.getVisibility() == View.VISIBLE) {
            mErrorText.animate()
                    .alpha(0f)
                    .translationY(getResources().getDimensionPixelSize(
                            R.dimen.fingerprint_error_text_disappear_distance))
                    .setDuration(100)
                    .setInterpolator(mFastOutLinearInInterpolator)
                    .withEndAction(() -> mErrorText.setVisibility(View.INVISIBLE))
                    .start();
        }
    }

    private void listenOrientationEvent() {
        mOrientationEventListener = new OrientationEventListener(this) {
            @Override
            public void onOrientationChanged(int orientation) {
                final int currentRotation = getDisplay().getRotation();
                if ((mPreviousRotation == Surface.ROTATION_90
                        && currentRotation == Surface.ROTATION_270) || (
                        mPreviousRotation == Surface.ROTATION_270
                                && currentRotation == Surface.ROTATION_90)) {
                    mPreviousRotation = currentRotation;
                    recreate();
                }
            }
        };
        mOrientationEventListener.enable();
        mPreviousRotation = getDisplay().getRotation();
    }

    private void stopListenOrientationEvent() {
        if (mOrientationEventListener != null) {
            mOrientationEventListener.disable();
        }
        mOrientationEventListener = null;
    }

    private final Animator.AnimatorListener mProgressAnimationListener
            = new Animator.AnimatorListener() {

        @Override
        public void onAnimationStart(Animator animation) { }

        @Override
        public void onAnimationRepeat(Animator animation) { }

        @Override
        public void onAnimationEnd(Animator animation) {
            if (mProgressBar.getProgress() >= PROGRESS_BAR_MAX) {
                mProgressBar.postDelayed(mDelayedFinishRunnable, FINISH_DELAY);
            }
        }

        @Override
        public void onAnimationCancel(Animator animation) { }
    };

    // Give the user a chance to see progress completed before jumping to the next stage.
    private final Runnable mDelayedFinishRunnable = new Runnable() {
        @Override
        public void run() {
            launchFinish(mToken);
        }
    };

    private final Animatable2.AnimationCallback mIconAnimationCallback =
            new Animatable2.AnimationCallback() {
        @Override
        public void onAnimationEnd(Drawable d) {
            if (mAnimationCancelled) {
                return;
            }

            // Start animation after it has ended.
            mProgressBar.post(new Runnable() {
                @Override
                public void run() {
                    startIconAnimation();
                }
            });
        }
    };

    private final Runnable mShowDialogRunnable = new Runnable() {
        @Override
        public void run() {
            showIconTouchDialog();
        }
    };

    private final Runnable mTouchAgainRunnable = new Runnable() {
        @Override
        public void run() {
            showError(getString(R.string.security_settings_fingerprint_enroll_lift_touch_again));
        }
    };

    @Override
    public int getMetricsCategory() {
        return SettingsEnums.FINGERPRINT_ENROLLING;
    }

    public static class IconTouchDialog extends InstrumentedDialogFragment {

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
            builder.setTitle(R.string.security_settings_fingerprint_enroll_touch_dialog_title)
                    .setMessage(R.string.security_settings_fingerprint_enroll_touch_dialog_message)
                    .setPositiveButton(R.string.security_settings_fingerprint_enroll_dialog_ok,
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog, int which) {
                                    dialog.dismiss();
                                }
                            });
            return builder.create();
        }

        @Override
        public int getMetricsCategory() {
            return SettingsEnums.DIALOG_FINGERPRINT_ICON_TOUCH;
        }
    }
}