/*
 * Copyright (C) 2025 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.documentsui.picker

import android.app.Activity
import android.content.pm.ApplicationInfo
import android.content.pm.PackageManager
import android.content.res.Resources
import androidx.test.filters.SmallTest
import com.android.documentsui.R
import com.android.documentsui.base.Shared
import org.junit.Assert.assertEquals
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.Parameterized
import org.mockito.Mock
import org.mockito.Mockito.eq
import org.mockito.Mockito.`when` as whenever
import org.mockito.MockitoAnnotations

/**
 * When apps are requesting access to a folder using `ACTION_OPEN_DOCUMENT_TREE` the application
 * label is shown in the UI. Let's ensure that the label is appropriately sanitised.
 */
@SmallTest
@RunWith(Parameterized::class)
class ApplicationNameTest {
    @Mock
    private lateinit var mockActivity: Activity

    @Mock
    private lateinit var resources: Resources

    @Mock
    private lateinit var pm: PackageManager

    companion object {
        const val PACKAGE_NAME = "com.package.test"
        const val ANONYMOUS_PACKAGE = "anonymous"

        @Parameterized.Parameters(name = "{index}")
        @JvmStatic
        fun parameters() =
            listOf(
                // Normal labels return their values.
                Pair("label", "label"),

                // Newlines are stripped.
                Pair("label\nlabel", "label label"),

                // Labels are trimmed to 500 characters.
                Pair("a".repeat(600), "a".repeat(500)),

                // An empty label returns the anonymous package name.
                Pair("", ANONYMOUS_PACKAGE)
            )
    }

    @Parameterized.Parameter(0)
    lateinit var testData: Pair<String, String>

    @Before
    fun setUp() {
        MockitoAnnotations.openMocks(this)
        whenever(mockActivity.resources).thenReturn(resources)
        whenever(mockActivity.packageManager).thenReturn(pm)
        whenever(resources.getString(R.string.anonymous_application)).thenReturn(ANONYMOUS_PACKAGE)
        whenever<String>(mockActivity.callingPackage).thenReturn(PACKAGE_NAME)
    }

    @Test
    fun testNameIsSanitized() {
        val info = ApplicationInfo()
        whenever(pm.getApplicationInfo(PACKAGE_NAME, 0)).thenReturn(info)

        whenever(pm.getApplicationLabel(eq(info))).thenReturn(testData.first)
        assertEquals(Shared.getCallingAppName(mockActivity), testData.second)
    }
}