/*
 * Copyright (C) 2014-2022 Arpit Khurana <arpitkh96@gmail.com>, Vishal Nehra <vishalmeham2@gmail.com>,
 * Emmanuel Messulam<emmanuelbendavid@gmail.com>, Raymond Lai <airwave209gt at gmail.com> and Contributors.
 *
 * This file is part of Amaze File Manager.
 *
 * Amaze File Manager is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.amaze.filemanager.ui.dialogs

import android.content.Intent
import android.os.Environment
import androidx.appcompat.widget.AppCompatCheckBox
import androidx.appcompat.widget.AppCompatTextView
import androidx.core.text.HtmlCompat
import androidx.core.text.HtmlCompat.FROM_HTML_MODE_COMPACT
import androidx.preference.PreferenceManager
import com.afollestad.materialdialogs.DialogAction
import com.afollestad.materialdialogs.MaterialDialog
import com.afollestad.materialdialogs.internal.MDButton
import com.amaze.filemanager.R
import com.amaze.filemanager.application.AppConfig
import com.amaze.filemanager.asynchronous.services.EncryptService.TAG_AESCRYPT
import com.amaze.filemanager.asynchronous.services.EncryptService.TAG_ENCRYPT_TARGET
import com.amaze.filemanager.asynchronous.services.EncryptService.TAG_OPEN_MODE
import com.amaze.filemanager.asynchronous.services.EncryptService.TAG_SOURCE
import com.amaze.filemanager.fileoperations.filesystem.OpenMode
import com.amaze.filemanager.filesystem.HybridFileParcelable
import com.amaze.filemanager.filesystem.RandomPathGenerator
import com.amaze.filemanager.filesystem.files.CryptUtil.AESCRYPT_EXTENSION
import com.amaze.filemanager.filesystem.files.CryptUtil.CRYPT_EXTENSION
import com.amaze.filemanager.filesystem.files.EncryptDecryptUtils
import com.amaze.filemanager.test.getString
import com.amaze.filemanager.ui.activities.MainActivity
import com.amaze.filemanager.ui.fragments.preferencefragments.PreferencesConstants
import com.amaze.filemanager.ui.views.WarnableTextInputLayout
import com.google.android.material.textfield.TextInputEditText
import org.junit.Assert.assertEquals
import org.junit.Assert.assertFalse
import org.junit.Assert.assertNull
import org.junit.Assert.assertTrue
import org.junit.Assert.fail
import org.junit.Before
import org.junit.Test
import org.robolectric.shadows.ShadowDialog
import java.io.File
import kotlin.random.Random

/**
 * Logic test for [EncryptAuthenticateDialog].
 */
class EncryptAuthenticateDialogTest : AbstractEncryptDialogTests() {
    private val randomizer = Random(System.currentTimeMillis())
    private lateinit var file: File
    private lateinit var tilFileSaveAs: WarnableTextInputLayout
    private lateinit var tilEncryptPassword: WarnableTextInputLayout
    private lateinit var tilEncryptPasswordConfirm: WarnableTextInputLayout
    private lateinit var editTextFileSaveAs: TextInputEditText
    private lateinit var editTextEncryptPassword: TextInputEditText
    private lateinit var editTextEncryptPasswordConfirm: TextInputEditText
    private lateinit var checkboxUseAze: AppCompatCheckBox
    private lateinit var textViewCryptInfo: AppCompatTextView
    private lateinit var okButton: MDButton

    /**
     * MainActivity setup.
     */
    @Before
    override fun setUp() {
        super.setUp()
        file =
            File(
                Environment.getExternalStorageDirectory(),
                RandomPathGenerator.generateRandomPath(
                    randomizer,
                    16,
                ),
            )
    }

    /**
     * Test simple workflow. Just enter a password and off it go.
     */
    @Test
    @Suppress("StringLiteralDuplication")
    fun testSimpleWorkflow() {
        performTest(
            { _, _, _ ->
                assertEquals("${file.name}$AESCRYPT_EXTENSION", editTextFileSaveAs.text.toString())
                editTextEncryptPassword.setText("abcdefgh")
                editTextEncryptPasswordConfirm.setText("abcdefgh")
                assertTrue(okButton.isEnabled)
                okButton.performClick()
            },
            object : EncryptDecryptUtils.EncryptButtonCallbackInterface {
                override fun onButtonPressed(
                    intent: Intent,
                    password: String,
                ) {
                    assertEquals(file.absolutePath, intent.getStringExtra(TAG_SOURCE))
                    assertTrue(intent.getBooleanExtra(TAG_AESCRYPT, false))
                    assertEquals(
                        "${file.name}$AESCRYPT_EXTENSION",
                        intent.getStringExtra(TAG_ENCRYPT_TARGET),
                    )
                    assertEquals("abcdefgh", password)
                }
            },
        )
    }

    /**
     * Test simple workflow with aze encryption checkbox checked. Also renamed target filename
     */
    @Test
    fun testAzeWorkflow() {
        performTest(
            { _, _, _ ->
                assertEquals("${file.name}$AESCRYPT_EXTENSION", editTextFileSaveAs.text.toString())
                editTextEncryptPassword.setText("abcdefgh")
                editTextEncryptPasswordConfirm.setText("abcdefgh")
                assertTrue(okButton.isEnabled)
                checkboxUseAze.isChecked = true
                assertEquals("${file.name}$CRYPT_EXTENSION", editTextFileSaveAs.text.toString())
                editTextFileSaveAs.setText("testfile$CRYPT_EXTENSION")
                okButton.performClick()
            },
            object : EncryptDecryptUtils.EncryptButtonCallbackInterface {
                override fun onButtonPressed(
                    intent: Intent,
                    password: String,
                ) {
                    assertEquals(file.absolutePath, intent.getStringExtra(TAG_SOURCE))
                    assertFalse(intent.getBooleanExtra(TAG_AESCRYPT, true))
                    assertEquals(
                        "testfile$CRYPT_EXTENSION",
                        intent.getStringExtra(TAG_ENCRYPT_TARGET),
                    )
                    assertEquals("abcdefgh", password)
                }
            },
        )
    }

    /**
     * Test password field validation.
     */
    @Test
    fun testPasswordValidations() {
        performTest({ _, _, _ ->
            editTextEncryptPassword.setText("abc")
            editTextEncryptPasswordConfirm.setText("def")
            assertFalse(okButton.isEnabled)
            assertEquals(
                getString(R.string.password_no_match),
                tilEncryptPasswordConfirm.error,
            )
            editTextEncryptPassword.setText("")
            editTextEncryptPasswordConfirm.setText("")
            assertFalse(okButton.isEnabled)
            assertEquals(getString(R.string.field_empty), tilEncryptPassword.error)
            editTextEncryptPassword.setText("     ")
            editTextEncryptPasswordConfirm.setText("     ")
            assertFalse(okButton.isEnabled)
            assertEquals(getString(R.string.field_empty), tilEncryptPassword.error)
            editTextEncryptPassword.setText("abcdef")
            editTextEncryptPasswordConfirm.setText("abcdef")
            assertTrue(okButton.isEnabled)
            editTextFileSaveAs.setText("")
            assertFalse(okButton.isEnabled)
        })
    }

    /**
     * Test filename field validations.
     */
    @Test
    fun testFilenameValidations() {
        performTest({ _, _, _ ->
            editTextEncryptPassword.setText("abc")
            editTextEncryptPasswordConfirm.setText("abc")
            editTextFileSaveAs.setText("${file.name}.error")
            assertFalse(okButton.isEnabled)
            assertEquals(
                getString(R.string.encrypt_file_must_end_with_aes),
                tilFileSaveAs.error,
            )
            editTextFileSaveAs.setText("${file.name}.aze")
            assertFalse(okButton.isEnabled)
            assertEquals(
                getString(R.string.encrypt_file_must_end_with_aes),
                tilFileSaveAs.error,
            )
            checkboxUseAze.isChecked = true
            assertTrue(okButton.isEnabled)
            assertNull(tilFileSaveAs.error)
            editTextFileSaveAs.setText("${file.name}.error")
            assertFalse(okButton.isEnabled)
            assertEquals(
                getString(R.string.encrypt_file_must_end_with_aze),
                tilFileSaveAs.error,
            )
            editTextFileSaveAs.setText("${file.name}.aes")
            assertFalse(okButton.isEnabled)
            assertEquals(
                getString(R.string.encrypt_file_must_end_with_aze),
                tilFileSaveAs.error,
            )
            editTextFileSaveAs.setText("")
            assertFalse(okButton.isEnabled)
            assertEquals(
                getString(R.string.field_empty),
                tilFileSaveAs.error,
            )
            editTextFileSaveAs.setText("          ")
            assertFalse(okButton.isEnabled)
            assertEquals(
                getString(R.string.field_empty),
                tilFileSaveAs.error,
            )
            editTextFileSaveAs.setText("${file.name}.aze")
            assertTrue(okButton.isEnabled)
            assertNull(tilFileSaveAs.error)
        })
    }

    /**
     * To test how would Amaze legacy encryption dialog pops up.
     */
    @Test
    fun testAzeCryptDialog() {
        performTest({ _, _, _ ->
            checkboxUseAze.isChecked = true
            assertEquals(
                HtmlCompat.fromHtml(
                    getString(R.string.encrypt_option_use_azecrypt_desc),
                    FROM_HTML_MODE_COMPACT,
                )
                    .toString(),
                textViewCryptInfo.text.toString(),
            )
            assertTrue(ShadowDialog.getShownDialogs().size == 2)
            assertTrue(ShadowDialog.getLatestDialog() is MaterialDialog)
            (ShadowDialog.getLatestDialog() as MaterialDialog).run {
                assertEquals(getString(R.string.warning), titleView.text)
                assertEquals(getString(R.string.crypt_warning_key), contentView?.text.toString())
                assertEquals(
                    getString(R.string.warning_never_show),
                    getActionButton(DialogAction.NEGATIVE).text,
                )
                assertEquals(
                    getString(R.string.warning_confirm),
                    getActionButton(DialogAction.POSITIVE).text,
                )
                assertTrue(getActionButton(DialogAction.POSITIVE).performClick())
            }
            assertEquals(2, ShadowDialog.getShownDialogs().size)
            assertFalse(ShadowDialog.getLatestDialog().isShowing)
            assertTrue(true == editTextFileSaveAs.text?.endsWith(CRYPT_EXTENSION))
            checkboxUseAze.isChecked = false
            assertEquals(
                HtmlCompat.fromHtml(
                    getString(R.string.encrypt_option_use_aescrypt_desc),
                    FROM_HTML_MODE_COMPACT,
                )
                    .toString(),
                textViewCryptInfo.text.toString(),
            )
            assertEquals(2, ShadowDialog.getShownDialogs().size)
            assertFalse(ShadowDialog.getLatestDialog().isShowing)
            assertTrue(true == editTextFileSaveAs.text?.endsWith(AESCRYPT_EXTENSION))
            checkboxUseAze.isChecked = true
            assertEquals(
                HtmlCompat.fromHtml(
                    getString(R.string.encrypt_option_use_azecrypt_desc),
                    FROM_HTML_MODE_COMPACT,
                )
                    .toString(),
                textViewCryptInfo.text.toString(),
            )
            assertEquals(3, ShadowDialog.getShownDialogs().size)
            assertTrue(ShadowDialog.getLatestDialog().isShowing)
            assertTrue(true == editTextFileSaveAs.text?.endsWith(CRYPT_EXTENSION))
            (ShadowDialog.getLatestDialog() as MaterialDialog)
                .getActionButton(DialogAction.NEGATIVE).performClick()
            assertEquals(3, ShadowDialog.getShownDialogs().size)
            assertFalse(ShadowDialog.getLatestDialog().isShowing)
            assertTrue(
                PreferenceManager.getDefaultSharedPreferences(AppConfig.getInstance())
                    .getBoolean(PreferencesConstants.PREFERENCE_CRYPT_WARNING_REMEMBER, false),
            )
            checkboxUseAze.isChecked = false
            assertEquals(3, ShadowDialog.getShownDialogs().size) // no new dialog
            checkboxUseAze.isChecked = true
            assertEquals(3, ShadowDialog.getShownDialogs().size)
        })
    }

    /**
     * Test jump across textfields should keep button status.
     */
    @Test
    fun testTextfieldFocusChanges() {
        performTest({ _, _, _ ->
            editTextFileSaveAs.requestFocus()
            assertFalse(okButton.isEnabled)
            editTextEncryptPasswordConfirm.requestFocus()
            assertFalse(okButton.isEnabled)
            editTextEncryptPassword.requestFocus()
            assertFalse(okButton.isEnabled)
        })
    }

    /**
     * prepare MainActivity scenario. Also populate dialog fields to test
     *
     * @param testContent main test function
     * @param callback optional callback for result verification
     */
    private fun performTest(
        testContent: (
            dialog: MaterialDialog,
            intent: Intent,
            activity: MainActivity,
        ) -> Unit,
        callback: EncryptDecryptUtils.EncryptButtonCallbackInterface =
            object : EncryptDecryptUtils.EncryptButtonCallbackInterface {},
    ) {
        scenario.onActivity { activity ->
            Intent().putExtra(TAG_SOURCE, HybridFileParcelable(file.absolutePath))
                .putExtra(TAG_OPEN_MODE, OpenMode.FILE).let { intent ->
                    EncryptAuthenticateDialog.show(
                        activity,
                        intent,
                        activity,
                        activity.appTheme,
                        callback,
                    )
                    ShadowDialog.getLatestDialog()?.run {
                        assertTrue(this is MaterialDialog)
                        (this as MaterialDialog).let {
                            editTextFileSaveAs =
                                findViewById<TextInputEditText>(
                                    R.id.edit_text_encrypt_save_as,
                                )
                            editTextEncryptPassword =
                                findViewById<TextInputEditText>(
                                    R.id.edit_text_dialog_encrypt_password,
                                )
                            editTextEncryptPasswordConfirm =
                                findViewById<TextInputEditText>(
                                    R.id.edit_text_dialog_encrypt_password_confirm,
                                )
                            tilFileSaveAs =
                                findViewById<WarnableTextInputLayout>(
                                    R.id.til_encrypt_save_as,
                                )
                            tilEncryptPassword =
                                findViewById<WarnableTextInputLayout>(
                                    R.id.til_encrypt_password,
                                )
                            tilEncryptPasswordConfirm =
                                findViewById<WarnableTextInputLayout>(
                                    R.id.til_encrypt_password,
                                )
                            checkboxUseAze = findViewById<AppCompatCheckBox>(R.id.checkbox_use_aze)
                            textViewCryptInfo =
                                findViewById<AppCompatTextView>(
                                    R.id.text_view_crypt_info,
                                )
                            okButton = getActionButton(DialogAction.POSITIVE)
                            assertFalse(okButton.isEnabled)
                            assertTrue(true == editTextFileSaveAs.text?.startsWith(file.name))
                            testContent.invoke(it, intent, activity)
                        }
                    } ?: fail("Dialog cannot be seen?")
                }
        }
    }
}