/*
 * Copyright (C) 2023 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.launcher3.ui;

import static androidx.test.core.app.ApplicationProvider.getApplicationContext;

import static com.android.launcher3.BubbleTextView.DISPLAY_ALL_APPS;
import static com.android.launcher3.BubbleTextView.DISPLAY_PREDICTION_ROW;
import static com.android.launcher3.config.FeatureFlags.ENABLE_TWOLINE_ALLAPPS;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;

import android.content.Context;
import android.graphics.Typeface;
import android.view.ViewGroup;

import com.android.launcher3.BubbleTextView;
import com.android.launcher3.Utilities;
import com.android.launcher3.model.data.ItemInfoWithIcon;
import com.android.launcher3.search.StringMatcherUtility;
import com.android.launcher3.util.ActivityContextWrapper;
import com.android.launcher3.util.IntArray;
import com.android.launcher3.util.TestUtil;
import com.android.launcher3.views.BaseDragLayer;

import org.junit.Before;
import org.junit.Test;

/**
 * Unit tests for testing modifyTitleToSupportMultiLine() in BubbleTextView.java
 * This class tests a couple of strings and uses the getMaxLines() to determine if the test passes.
 * Verifying with getMaxLines() is sufficient since BubbleTextView can only be in one line or
 * two lines, and this is enough to ensure whether the string should be specifically wrapped onto
 * the second line and to ensure truncation.
 */
public class BubbleTextViewTest {

    private static final StringMatcherUtility.StringMatcher
            MATCHER = StringMatcherUtility.StringMatcher.getInstance();
    private static final int ONE_LINE = 1;
    private static final int TWO_LINE = 2;
    private static final String TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT = "Battery Stats";
    private static final String TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT_RESULT =
            "Battery\nStats";
    private static final String TEST_LONG_STRING_NO_SPACE_LONGER_THAN_CHAR_LIMIT =
            "flutterappflorafy";
    private static final String TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT =
            "System UWB Field Test";
    private static final String TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT_RESULT =
            "System\nUWB Field Test";
    private static final String TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT =
            "LEGO®Builder";
    private static final String TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT_RESULT =
            "LEGO®\nBuilder";
    private static final String EMPTY_STRING = "";
    private static final int CHAR_CNT = 7;

    private BubbleTextView mBubbleTextView;
    private ItemInfoWithIcon mItemInfoWithIcon;
    private Context mContext;
    private int mLimitedWidth;

    @Before
    public void setUp() throws Exception {
        Utilities.enableRunningInTestHarnessForTests();
        mContext = new ActivityContextWrapper(getApplicationContext());
        mBubbleTextView = new BubbleTextView(mContext);
        mBubbleTextView.reset();

        BubbleTextView testView = new BubbleTextView(mContext);
        testView.setTypeface(Typeface.MONOSPACE);
        testView.setText("B");
        // calculate the maxWidth of the textView by calculating the width of one monospace
        // character * CHAR_CNT
        mLimitedWidth =
                (int) (testView.getPaint().measureText(testView.getText().toString()) * CHAR_CNT);
        // needed otherwise there is a NPE during setText() on checkForRelayout()
        mBubbleTextView.setLayoutParams(
                new ViewGroup.LayoutParams(mLimitedWidth,
                BaseDragLayer.LayoutParams.WRAP_CONTENT));
        mItemInfoWithIcon = new ItemInfoWithIcon() {
            @Override
            public ItemInfoWithIcon clone() {
                return null;
            }
        };
    }

    @Test
    public void testEmptyString_flagOn() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, true)) {
            mItemInfoWithIcon.title = EMPTY_STRING;
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertNotEquals(TWO_LINE, mBubbleTextView.getMaxLines());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void testEmptyString_flagOff() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, false)) {
            mItemInfoWithIcon.title = EMPTY_STRING;
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(ONE_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void testStringWithSpaceLongerThanCharLimit_flagOn() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, true)) {
            // test string: "Battery Stats"
            mItemInfoWithIcon.title = TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(TWO_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void testStringWithSpaceLongerThanCharLimit_flagOff() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, false)) {
            // test string: "Battery Stats"
            mItemInfoWithIcon.title = TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(ONE_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void testLongStringNoSpaceLongerThanCharLimit_flagOn() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, true)) {
            // test string: "flutterappflorafy"
            mItemInfoWithIcon.title = TEST_LONG_STRING_NO_SPACE_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(ONE_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Test
    public void testLongStringNoSpaceLongerThanCharLimit_flagOff() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, false)) {
            // test string: "flutterappflorafy"
            mItemInfoWithIcon.title = TEST_LONG_STRING_NO_SPACE_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(ONE_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw  new RuntimeException(e);
        }
    }

    @Test
    public void testLongStringWithSpaceLongerThanCharLimit_flagOn() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, true)) {
            // test string: "System UWB Field Test"
            mItemInfoWithIcon.title = TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(TWO_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw  new RuntimeException(e);
        }
    }

    @Test
    public void testLongStringWithSpaceLongerThanCharLimit_flagOff() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, false)) {
            // test string: "System UWB Field Test"
            mItemInfoWithIcon.title = TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(ONE_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw  new RuntimeException(e);
        }
    }

    @Test
    public void testLongStringSymbolLongerThanCharLimit_flagOn() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, true)) {
            // test string: "LEGO®Builder"
            mItemInfoWithIcon.title = TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(TWO_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw  new RuntimeException(e);
        }
    }

    @Test
    public void testLongStringSymbolLongerThanCharLimit_flagOff() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, false)) {
            // test string: "LEGO®Builder"
            mItemInfoWithIcon.title = TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setDisplay(DISPLAY_ALL_APPS);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(ONE_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw  new RuntimeException(e);
        }
    }

    @Test
    public void modifyTitleToSupportMultiLine_TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT() {
        // test string: "Battery Stats"
        IntArray breakPoints = StringMatcherUtility.getListOfBreakpoints(
                TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT, MATCHER);
        CharSequence newString = BubbleTextView.modifyTitleToSupportMultiLine(mLimitedWidth,
                TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT, mBubbleTextView.getPaint(),
                breakPoints);
        assertEquals(TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT_RESULT, newString);
    }

    @Test
    public void modifyTitleToSupportMultiLine_TEST_LONG_STRING_NO_SPACE_LONGER_THAN_CHAR_LIMIT() {
        // test string: "flutterappflorafy"
        IntArray breakPoints = StringMatcherUtility.getListOfBreakpoints(
                TEST_LONG_STRING_NO_SPACE_LONGER_THAN_CHAR_LIMIT, MATCHER);
        CharSequence newString = BubbleTextView.modifyTitleToSupportMultiLine(mLimitedWidth,
                TEST_LONG_STRING_NO_SPACE_LONGER_THAN_CHAR_LIMIT, mBubbleTextView.getPaint(),
                breakPoints);
        assertEquals(TEST_LONG_STRING_NO_SPACE_LONGER_THAN_CHAR_LIMIT, newString);
    }

    @Test
    public void modifyTitleToSupportMultiLine_TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT() {
        // test string: "System UWB Field Test"
        IntArray breakPoints = StringMatcherUtility.getListOfBreakpoints(
                TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT, MATCHER);
        CharSequence newString = BubbleTextView.modifyTitleToSupportMultiLine(mLimitedWidth,
                TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT, mBubbleTextView.getPaint(),
                breakPoints);
        assertEquals(TEST_LONG_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT_RESULT, newString);
    }

    @Test
    public void modifyTitleToSupportMultiLine_TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT() {
        // test string: "LEGO®Builder"
        IntArray breakPoints = StringMatcherUtility.getListOfBreakpoints(
                TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT, MATCHER);
        CharSequence newString = BubbleTextView.modifyTitleToSupportMultiLine(mLimitedWidth,
                TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT, mBubbleTextView.getPaint(),
                breakPoints);
        assertEquals(TEST_LONG_STRING_SYMBOL_LONGER_THAN_CHAR_LIMIT_RESULT, newString);
    }

    @Test
    public void testEnsurePredictionRowIsOneLine() {
        try (AutoCloseable flag = TestUtil.overrideFlag(ENABLE_TWOLINE_ALLAPPS, true)) {
            // test string: "Battery Stats"
            mItemInfoWithIcon.title = TEST_STRING_WITH_SPACE_LONGER_THAN_CHAR_LIMIT;
            mBubbleTextView.setDisplay(DISPLAY_PREDICTION_ROW);
            mBubbleTextView.applyLabel(mItemInfoWithIcon);
            mBubbleTextView.setTypeface(Typeface.MONOSPACE);
            mBubbleTextView.measure(mLimitedWidth, 0);
            mBubbleTextView.onPreDraw();
            assertEquals(ONE_LINE, mBubbleTextView.getLineCount());
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}